Cross Reference: /src/lib/libpthread

History log of /src/lib/libpthread
Revision	Date	Author	Comments
1.2	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.1	20-Dec-1993	proven	Copyrights added to each file.
1.100	07-Apr-2025	rillig	libpthread: fix lint build
1.99	22-Nov-2024	riastradh	libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.98	14-Sep-2023	rin	branches: 1.98.2; libpthread/Makefile: trailing whitespace
1.97	14-Jul-2023	lukem	fix rump URLs Link to https://github.com/rumpkernel/ instead of a site now taken over by an SEO squatter. Per discussion on github.com/rumpkernel issues with pooka. PR misc/57501
1.96	11-Nov-2019	joerg	branches: 1.96.8; Update LLVM to 10.0.0git (01f3a59fb3e2542fce74c768718f594d0debd0da)
1.95	22-Sep-2019	brad	Add USE_SHLIBDIR=yes to a number of Makefiles for the libraries used by /sbin/{zfs,zpool,mount_zfs}. The general effect is to move them from /usr/lib to /lib. Compatibility links are installed in /usr/lib and nothing that is installed, say in /usr/pkg, appears to break. With this, it is possible to have a /var and /usr mount using ZFS legacy mounting early on in the boot process. Run tested on amd64 and i386 and compile tested on evbarm.
1.94	07-May-2019	maya	branches: 1.94.2; Make CLEANFILES actually work. .TARGET is not defined when not in a target rule. Thanks xtos for the heads up.
1.93	07-May-2019	maya	Replace the link command for libpthread.a so that we create a single section with all the libpthread symbols in it. This makes -lpthread behave like to -Wl,--whole-archive -lpthread. This avoids a situation where threaded static binaries use some libc thread stubs, which are racy. Fixes PR lib/54001: call_once2_32, call_once2_static test cases failing on amd64 since gcc7 import. Suggested by Jonathan Wakely, thanks!
1.92	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.91	03-Feb-2019	thorpej	Implement support for "pshared" POSIX semaphores. Fixes lib/53273 (and Firefox's multi-process tab feature).
1.90	09-Jun-2018	christos	branches: 1.90.2; But set NOSANITIZER
1.89	09-Jun-2018	christos	We can't build those three with MKSANITIZER, they are used too early.
1.88	25-Feb-2018	chs	branches: 1.88.2; remove hard-coded -fomit-frame-pointer for pthread stuff, let these use the same setting as the rest of the tree. the performance difference is marginal and this allows dtrace ustack() to work better.
1.87	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.86	23-Apr-2016	christos	Add pthread_getcpuclockid(3)
1.85	16-Dec-2014	pooka	Allow for arbitrary MI scheduler implementations. A concrete result is enabling unpatched libpthread to run on the rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler. Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall interfaces (well, "syscall" interfaces in that scenario ;) More specifically about the change itself: 1) instead of calling _lwp_makecontext() followed by _lwp_create() and passing the entry point in ucontext_t (MD) through the calls, roll the calls into pthread__makelwp() and allow alternate implementations for that MI interface. 2) allow compile-time overriding of __lwp_gettcb_fast() or __lwp_getprivate_fast, which are inline and leak MD scheduler/thread details into libpthread Additionally, two small nits: I) define LIB=pthread before including mk.conf so that it's possible to test for LIB==pthread in mk.conf II) make it possible to leave out pthread_cancelstub.c. This is required by the current implementation of rumprun-posix (i.e. rumprun on POSIX hosts) due to symbol collisions. It needs to be fixed properly some day, but for now allows an almost-correct libpthread to run. I am sure @justin will be happy to explain the details ;) no change to NetBSD tested: anita+atf
1.84	10-Aug-2014	matt	MKCOMPAT fixes for when compat MACHINE_CPU != normal MACHINE_CPU
1.83	09-Oct-2013	matt	Use MACHINE_CPU for m68k. Use similar logic for both tests.
1.82	15-Aug-2013	matt	Add support for an optional ARCHSUBDIR/Makefile.inc
1.81	12-Aug-2013	joerg	Some architectures can't create unwind tables without the frame pointer, so don't use -fomit-frame-pointer on those.
1.80	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.79	25-Feb-2013	apb	Explain what PTHREAD__COMPAT is for. This comment in src/libpthread/Makefile is adated from a comment in src/doc/CHANGES.prev.
1.78	31-Jan-2013	riastradh	Add pthread_condattr_setclock(3) man page link.
1.77	04-Aug-2012	matt	branches: 1.77.2; -Wfoo goes into CWARNFLAGS
1.76	04-Apr-2012	joerg	Disable new -Wstring-plus-int warning where needed for now. Adjust various places that add GCC-only options to check for the active compiler first.
1.75	21-Mar-2012	matt	These directories default to WARNS?=5
1.74	12-Mar-2012	joerg	Move pthread_once implementation into a separate file, it doesn't depend on the mutex implementation in any way.
1.73	10-Nov-2011	yamt	branches: 1.73.2; document pthread_curcpu_np
1.72	16-Aug-2011	christos	branches: 1.72.2; document non-literal format strings
1.71	24-Dec-2010	skrll	Add support for DF_1_BIND_NOW, DF_1_NODELETE and DF_1_NOOPEN marked objects, and the RTLD_NODELETE and RTLD_NOLOAD flags to dlopen(3). Mark libpthread as DF_1_NOOPEN and use it to test the functionality. Somewhat taken from FreeBSD. Fixes PR 42029. OK from christos and joerg.
1.70	06-Aug-2010	christos	document pthread_getattr_np
1.69	09-Jul-2010	jruoho	Rationalize by moving pthread_key_delete(3) to pthread_key_create(3); and pthread_setspecific(3) to pthread_getspecific(3)
1.68	09-Jul-2010	jruoho	Rationalize by moving pthread_attr_setname_np(3) to pthread_attr_getname_np(3); and pthread_setname_np(3) to pthread_getname_np(3).
1.67	08-Jul-2010	jruoho	Group also pthread_attr_getschedparam(3) and pthread_attr_getschedpolicy(3), as these two pages fit well together.
1.66	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.65	07-Jul-2010	jruoho	Finally, split pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() to their own page.
1.64	07-Jul-2010	jruoho	Split pthread_attr_getschedparam() and pthread_attr_setschedparam() to a separate page.
1.63	07-Jul-2010	jruoho	Split pthread_attr_getinheritsched() and pthread_attr_setinheritsched() to a separate page, and actually document these.
1.62	07-Jul-2010	jruoho	Move pthread_attr_getguardsize() and pthread_attr_setguardsize() to a separate page, and actually document these.
1.61	07-Jul-2010	jruoho	Move the thread stack attribute functions to a separate page. In addition, document pthread_attr_getstack() and pthread_attr_setstack(). Try to also document these a little better (in particular, note some items in the long list of caveats and questions related to application-controlled thread stack).
1.60	07-Jul-2010	jruoho	Split pthread_attr_getdetachstate(3) and pthread_attr_setdetachstate(3) to a separate page. Once ready, the main page, pthread_attr(3), will contain a summary of the various thread attribute functions.
1.59	07-Jul-2010	jruoho	Move pthread_attr_{g,s}etscope() to a separate page and try to document these better. Should fix PR lib/41831 from Wolfgang Stukenbrock. XXX: Please proofread.
1.58	06-Jul-2010	jruoho	Document pthread_attr_get_np(). Fixes PR lib/39289 from ahoka@.
1.57	19-May-2010	jruoho	Build links for rest of the pthread_attr(3) functions. Hopefully I got all of them right in the setlist...
1.56	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.55	26-Oct-2008	mrg	branches: 1.55.4; check for ${PTHREAD_MACHINE_ARCH} before ${MACHINE_ARCH} or ${MACHINE_CPU}
1.54	08-Oct-2008	ad	Adjust the compat stuff slightly so that the changes are mostly self contained (Makefile, pthread_compat.c).
1.53	29-Sep-2008	ad	make PTHREAD__COMPAT=1 Builds a libpthread that can be dropped into a NetBSD 2/3/4 chroot. This makes threading work in the chroot when using a NetBSD 5 kernel, no other modifications required.
1.52	16-Jun-2008	rmind	- Add affinity(3) manual page, which describes thread affinity, pthread_setaffinity_np(3) and pthread_getaffinity_np(3) functions, provides simple code example. - Add cpuset(3) manual page, which describes API of CPU-sets. Thanks <wiz> for many improvements!
1.51	10-Mar-2008	rmind	branches: 1.51.2; 1.51.4; Add sched(3) manual page, and appropriate links. Thanks <wiz> for review and fixes!
1.50	10-Feb-2008	ad	branches: 1.50.2; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.49	15-Jan-2008	rmind	Implementation of processor-sets, affinity and POSIX real-time extensions. Add schedctl(8) - a program to control scheduling of processes and threads. Notes: - This is supported only by SCHED_M2; - Migration of LWP mechanism will be revisited; Proposed on: <tech-kern>. Reviewed by: <ad>.
1.48	14-Dec-2007	yamt	document following functions. pthread_attr_getname_np pthread_attr_setname_np pthread_getname_np pthread_setname_np
1.47	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.46	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.45	13-Oct-2007	jnemeth	SSP doesn't like alloca...
1.44	04-Oct-2007	ad	Compile pthread_getspecific / pthread_setspecific with -fomit-frame-pointer -falign-functions=32, since these two really get hammered on. To make them faster needs a threadreg or TLS, unless there is a way to tell gcc that a library-local (pthread__threadmask) variable does not need to be PIC.
1.43	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.42	16-Aug-2007	ad	branches: 1.42.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.41	16-Aug-2007	ad	Remove PT_FIXEDSTACKSIZE_LG.
1.40	02-Mar-2007	ad	branches: 1.40.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.39	09-Feb-2007	ad	Sync with kernel changes introduced by merging the newlock2 branch.
1.38	20-Jan-2007	christos	set warns to 4
1.37	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.36	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.35	13-Dec-2005	christos	include libc after our own files to fix ports that have 2 assym.h's. One in pthread and one in libc.
1.34	13-Sep-2005	christos	XXX: Work around libpthread's "intimate" connection with libc.
1.33	17-Jun-2005	peter	Create links for pthread_attr_setschedparam.3 and pthread_attr_getschedparam.3 to pthread_attr.3. From Igor Sobrado in PR/29997.
1.32	17-Jun-2005	peter	Don't create links to pthread_barierattr_init.3 and pthread_barierattr_destroy.3 but to pthread_barrierattr_init.3 and pthread_barrierattr_destroy.3 (note the 2 rs in barrier).
1.31	30-May-2005	thorpej	Use TOOL_GENASSYM. Part of PR toolchain/30350
1.30	03-Feb-2005	christos	branches: 1.30.2; Add charles' mlock fixes, protected with PTHREAD_MLOCK_KLUDGE and enabled by default, until we come up with a real fix.
1.29	14-Dec-2004	yamt	document sched_yield.
1.28	10-Dec-2004	nathanw	Use CPP macros to cause many libpthread functions used by applications to be transformed into the do-nothing-when-libpthread-isn't-linked libc stub names. This will permit library code that uses <pthread.h> and pthread functions "defensively" to not need to link against libpthread and not need to be patched to the threadlib.h API.
1.27	02-Jun-2004	pooka	pthread_spin_lock.3 also describes pthread_spin_trylock(), so link them together
1.26	21-May-2004	christos	add pool code for res state. XXX: could be more efficient.
1.25	02-Jan-2004	lukem	branches: 1.25.4; Add dependencies to assym.h on: pthread.h pthread_int.h pthread_md.h Should help prevent the problem I raised in [kern/23946], based on a hint from Christian Limpach. Add MAKEVERBOSE support.
1.24	27-Nov-2003	cl	Set default stack size to the current limit on the stack size as set with the shell's command to change limits. Make the PTHREAD_STACKSIZE environment variable override the default stack size. The old fixed stack size behaviour can be enable with PT_FIXEDSTACKSIZE_LG when building libpthread.
1.23	12-Nov-2003	christos	Document pthread_attr_setcreatesuspend_np, pthread_suspend_np, pthread_resume_np
1.22	26-Oct-2003	lukem	Use ${HOST_SH} instead of `sh'. If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH; Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.
1.21	13-Aug-2003	nathanw	Split out pthread_{set,get}specific() into a separate file and arrange for that file to not be built with profiling. This makes it reasonable to use pthread_{set,get}specific() to implement thread-safe profiline call counts.
1.20	01-Aug-2003	lukem	Rework how dependency generation is performed: * DPSRCS contains extra dependencies, but is _NOT_ added to CLEANFILES. This is a change of behaviour. If a Makefile wants the clean semantics it must specifically append to CLEANFILES. Resolves PR toolchain/5204. * To recap: .d (depend) files are generated for all files in SRCS and DPSRCS that have a suffix of: .c .m .s .S .C .cc .cpp .cxx * If YHEADER is set, automatically add the .y->.h to DPSRCS & CLEANFILES * Ensure that ${OBJS} ${POBJS} ${LOBJS} ${SOBJS} .d depend upon ${DPSRCS} Deprecate the (short lived) DEPENDSRCS Update the various Makefiles to these new semantics; generally either adding to CLEANFILES (because DPSRCS doesn't do that anymore), or replacing specific .o dependencies with DPSRCS entries. Tested with "make -j 8 distribution" and "make distribution".
1.19	24-Jul-2003	wiz	Add pthread(3), based on one by Hubert Feyrer, improved by yours truly, reviewed by Nathan J. Williams.
1.18	18-Jul-2003	nathanw	pthread.c was getting a bit unwieldly. Move pthread_attr stuff out into a new file, and put the shared private structure definition in pthread_int.h.
1.17	03-Jun-2003	nathanw	Make infrastructure for man pages.
1.16	10-Mar-2003	nathanw	Re-enable nanosleep(); kernel bug is squished (kern_time.c:1.67).
1.15	28-Feb-2003	nathanw	Disable userlevel nanosleep() until I find the timer/alarm bug that it is tickling.
1.14	15-Feb-2003	nathanw	Implement nanosleep() at userlevel. Threaded applications seem to like to sleep a lot, and there's no need for each such thread to consume kernel resources. (accidentally checked the pthread.c part of this in yesterday; no reason not to finish the job)
1.13	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.12	21-Jan-2003	christos	add manual pages.
1.11	20-Jan-2003	christos	add support for p1003.1b semaphores. From FreeBSD
1.10	19-Jan-2003	thorpej	Always allow includes to be installed. This makes it easier for people to get straggling ports bootstrapped (pthread.h is required in order to build libc).
1.9	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.8	08-Oct-1997	scottr	branches: 1.8.2; This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.7	07-Feb-1994	proven	The latest pthread library.
1.6	22-Nov-1993	proven	Fix for older shells that can't handle then;
1.5	16-Nov-1993	proven	Added NOPIC flag.
1.4	15-Nov-1993	cgd	correct my bad advice
1.3	15-Nov-1993	proven	OK one more try at getting it right ...
1.2	15-Nov-1993	proven	Makefile needed a preall to make a few links before compiling sources. CVS doesn't check in symlinks.
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.8.2.21	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.8.2.20	07-Jan-2003	thorpej	Implement the pthread_barrier API.
1.8.2.19	28-Oct-2002	nathanw	Implement POSIX read-write locks.
1.8.2.18	07-Oct-2002	thorpej	Slight adjustment to last -- Only bring in <bsd.lib.mk> if LIB is defined, and bring in <bsd.man.mk> otherwise.
1.8.2.17	07-Oct-2002	thorpej	Issue a warning, but to not error out (just skip it) if we don't yet have pthread support for the platform we're building on.
1.8.2.16	14-Aug-2002	nathanw	Infrastructure for machine-dependent init code.
1.8.2.15	03-May-2002	nathanw	Remove accidentally committed variables.
1.8.2.14	02-May-2002	nathanw	Different way of integrating with libc: Create a vector type for pthread operations; libc will have a pointer to such a vector. When the pthread library is loaded, set libc's pointer to a vector of real operations. This removes the reliance on weak symbol magic, which didn't work for static binaries, and as an aesthetic side effect, we don't have to export a bunch of ugly _libc_pthread_* wrappers.
1.8.2.13	11-Apr-2002	thorpej	This file is exactly the same as include/sched.h; don't bother with the second copy.
1.8.2.12	11-Apr-2002	nathanw	Add "hard" stubs for libc interface. Weak aliases didn't work so well.
1.8.2.11	04-Apr-2002	nathanw	Remove an unnecessary bit of variable indirection.
1.8.2.10	28-Jan-2002	nathanw	Add new files.
1.8.2.9	16-Nov-2001	thorpej	Need bsd.own.mk early due to variable expansion rules and the use of .if exists...
1.8.2.8	06-Sep-2001	nathanw	Add dependancies on assym.h, so that "make depend" is not strictly necessary.
1.8.2.7	08-Aug-2001	nathanw	Implement thread-specific data.
1.8.2.6	25-Jul-2001	nathanw	WARNS=2
1.8.2.5	25-Jul-2001	nathanw	Implement most of condition variables (pthread_cond_timedwait() is not yet done).
1.8.2.4	17-Jul-2001	nathanw	Add a mechanisim for debugging that is less likely to change scheduling behaviour than using printf (writing to a shared memory segment), and a simple tool for dumping the buffer. Partly inspired by the kernel msgbuf code.
1.8.2.3	13-Jul-2001	nathanw	Make userlevel-only *context functions part of libpthread rather than libc.
1.8.2.2	13-Jul-2001	nathanw	Add the new headers.
1.8.2.1	08-Mar-2001	nathanw	Forgot this file, somehow.
1.25.4.1	21-Jun-2005	riz	Pull up revision 1.32 (requested by peter in ticket #2002): Don't create links to pthread_barierattr_init.3 and pthread_barierattr_destroy.3 but to pthread_barrierattr_init.3 and pthread_barrierattr_destroy.3 (note the 2 rs in barrier).
1.30.2.2	18-Jun-2005	tron	Pull up revision 1.33 (requested by peter in ticket #473): Create links for pthread_attr_setschedparam.3 and pthread_attr_getschedparam.3 to pthread_attr.3. From Igor Sobrado in PR/29997.
1.30.2.1	18-Jun-2005	tron	Pull up revision 1.32 (requested by peter in ticket #473): Don't create links to pthread_barierattr_init.3 and pthread_barierattr_destroy.3 but to pthread_barrierattr_init.3 and pthread_barrierattr_destroy.3 (note the 2 rs in barrier).
1.40.2.2	10-Sep-2007	skrll	Sync with HEAD.
1.40.2.1	03-Sep-2007	skrll	Sync with HEAD.
1.42.2.3	23-Mar-2008	matt	sync with HEAD
1.42.2.2	09-Jan-2008	matt	sync with HEAD
1.42.2.1	06-Nov-2007	matt	sync with HEAD
1.50.2.1	24-Mar-2008	keiichi	sync with head.
1.51.4.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.51.2.1	17-Jun-2008	yamt	sync with head.
1.55.4.2	26-Oct-2008	mrg	check for ${PTHREAD_MACHINE_ARCH} before ${MACHINE_ARCH} or ${MACHINE_CPU}
1.55.4.1	26-Oct-2008	mrg	file Makefile was added on branch christos-time_t on 2008-10-26 00:00:28 +0000
1.72.2.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.72.2.2	30-Oct-2012	yamt	sync with head
1.72.2.1	17-Apr-2012	yamt	sync with head
1.73.2.1	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.77.2.3	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.77.2.2	23-Jun-2013	tls	resync from head
1.77.2.1	25-Feb-2013	tls	resync with head
1.88.2.1	25-Jun-2018	pgoyette	Sync with HEAD
1.90.2.2	13-Apr-2020	martin	Mostly merge changes from HEAD upto 20200411
1.90.2.1	10-Jun-2019	christos	Sync with HEAD
1.94.2.1	27-Sep-2019	martin	Pull up following revision(s) (requested by brad in ticket #252): external/cddl/osnet/lib/libzpool/Makefile: revision 1.13 lib/libpthread/Makefile: revision 1.95 external/cddl/osnet/lib/libuutil/Makefile: revision 1.6 distrib/sets/lists/base/shl.mi: revision 1.871 external/cddl/osnet/lib/libzfs_core/Makefile: revision 1.2 external/cddl/osnet/lib/libnvpair/Makefile: revision 1.11 external/cddl/osnet/lib/libzfs/Makefile: revision 1.10 external/cddl/osnet/lib/libavl/Makefile: revision 1.6 distrib/sets/lists/debug/shl.mi: revision 1.230 external/cddl/osnet/lib/libumem/Makefile: revision 1.7 Add USE_SHLIBDIR=yes to a number of Makefiles for the libraries used by /sbin/{zfs,zpool,mount_zfs}. The general effect is to move them from /usr/lib to /lib. Compatibility links are installed in /usr/lib and nothing that is installed, say in /usr/pkg, appears to break. With this, it is possible to have a /var and /usr mount using ZFS legacy mounting early on in the boot process. Run tested on amd64 and i386 and compile tested on evbarm. Fix MKDEBUG distrib sets Add libpthread, libnvpair and ZFS libs to dynamicroot.
1.96.8.1	20-Sep-2024	martin	Pull up following revision(s) (requested by rin in ticket #889): lib/librumpuser/configure.ac: revision 1.6 lib/librumpuser/rumpuser_port.h: revision 1.53 lib/libpthread/Makefile: revision 1.97 sys/rump/share/man/man3/rumpuser.3: revision 1.4 sys/rump/share/man/man7/rumpkernel.7: revision 1.4 sys/rump/share/man/man7/rumpkernel.7: revision 1.5 fix rump URLs in man pages Link to https://github.com/rumpkernel/wiki/wiki instead of a site now taken over by an SEO squatter. Per discussion on github.com/rumpkernel issues with pooka. PR misc/57501 fix rump URLs Link to https://github.com/rumpkernel/ instead of a site now taken over by an SEO squatter. Per discussion on github.com/rumpkernel issues with pooka. PR misc/57501 use rumpkernel.github.io as the entry point
1.98.2.1	02-Aug-2025	perseant	Sync with HEAD
1.7	08-Feb-2017	kamil	libpthread_dbg(3) deletion from the base distribution libpthread_dbg(3) is a remnant library from the M:N thread model (pre-NetBSD-5.0) API to introspect threads within a process and for use of debuggers. Currently in the 1:1 model it's not used in GDB neither in LLDB and it's not either planned to be used. It's current function to read pthread_t structures is realizable within a regular debugger capable to instrospect objects within a tracee (GDB, LLDB...). Remaining users of this API can still use this library from pkgsrc/devel/libpthread_dbg. Sponsored by <The NetBSD Foundation>
1.6	16-Apr-2009	wiz	branches: 1.6.28; 1.6.32; Add CAVEATS section: Due to limitations in the current pthread implementation, makecontext(3) and sigaltstack(2) should not be used in programs which link against libpthread (whether threads are used or not). Wording from drochner@ and ad@ Bump date for man pages. Add note in libpthread/README so it's not forgotten to update the man pages when the problem is fixed.
1.5	16-Oct-2007	ad	branches: 1.5.2; 1.5.18; Note that libpthread_dbg needs to be checked after making changes to libpthread.
1.4	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.3	07-Feb-1994	proven	The latest pthread library.
1.2	15-Nov-1993	proven	Makefile needed a preall to make a few links before compiling sources. CVS doesn't check in symlinks.
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.5.18.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.5.2.2	06-Nov-2007	matt	sync with HEAD
1.5.2.1	16-Oct-2007	matt	file README was added on branch matt-armv6 on 2007-11-06 23:11:38 +0000
1.6.32.1	21-Apr-2017	bouyer	Sync with HEAD
1.6.28.1	20-Mar-2017	pgoyette	Sync with HEAD
1.19	02-Jul-2017	joerg	Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.18	08-Feb-2017	kamil	branches: 1.18.4; libpthread_dbg(3) deletion from the base distribution libpthread_dbg(3) is a remnant library from the M:N thread model (pre-NetBSD-5.0) API to introspect threads within a process and for use of debuggers. Currently in the 1:1 model it's not used in GDB neither in LLDB and it's not either planned to be used. It's current function to read pthread_t structures is realizable within a regular debugger capable to instrospect objects within a tracee (GDB, LLDB...). Remaining users of this API can still use this library from pkgsrc/devel/libpthread_dbg. Sponsored by <The NetBSD Foundation>
1.17	03-Feb-2012	joerg	branches: 1.17.22; 1.17.26; ld.elf_so is reentrant.
1.16	09-Jul-2010	jruoho	branches: 1.16.6; As per (now closed) PR lib/43581, add a note about unsupported modifications to the red zone size.
1.15	24-Jan-2009	wiz	Fix typo.
1.14	10-Feb-2008	ad	We've got the priority/class stuff now.
1.13	24-Dec-2007	ad	Update.
1.12	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.11	08-Sep-2007	ad	Update.
1.10	23-Aug-2007	ad	branches: 1.10.2; Update.
1.9	04-Aug-2007	ad	branches: 1.9.2; Update.
1.8	02-Mar-2007	ad	branches: 1.8.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.7	02-Mar-2007	ad	Don't grab the state lock to check for cancellation around condition variables, as _lwp_wakeup/lwp_park provide the necessary barrier.
1.6	15-Feb-2007	yamt	fix a race between pthread_exit and pthread_create. inefficient, but better than crashing.
1.5	25-Dec-2006	ad	Add some items for 1:1 threads.
1.4	25-Nov-2003	christos	Update list of items.
1.3	06-Feb-2003	jdolecek	pthread_kill() was implemented, remove from list pthread_cond_timedwait() now works even before SA initialization, but some other routines do not; update the paragraph for this
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file TODO was initially added on branch nathanw_sa.
1.1.2.19	13-Jan-2003	thorpej	Implement recursive and errorcheck mutexes.
1.1.2.18	07-Jan-2003	thorpej	In the "ideas to play with" section, make a note about registers reserved by the ABI for thread-specific data.
1.1.2.17	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.16	30-Oct-2002	skrll	Nathan added pthread_rwlock.c
1.1.2.15	02-Oct-2002	thorpej	One more signal-reliated item.
1.1.2.14	02-Oct-2002	thorpej	libc: Internally rename __sigaction14 to __libc_sigaction14. Provide a weak alias of __sigaction14 -> __libc_sigaction14. libpthread: Use __libc_sigaction14 to actually register the signal handler, rather than using __sigaction_sigtramp() directly with a hard-coded trampoline version. While we don't actually use the libc trampoline, we want to avoid depending on any COMPAT_* kernel options down the road (this is already the case for the VAX port). Be explicit about which version of the signal interface we're interposing (...14), and build pthread_sig.c with __LIBC12_SOURCE__ (required to get the libc-internal interfaces).
1.1.2.13	02-Oct-2002	thorpej	...and another.
1.1.2.12	02-Oct-2002	thorpej	Add another item to the "bugs to fix" list.
1.1.2.11	02-Oct-2002	thorpej	Add some TODO items.
1.1.2.10	25-Mar-2002	nathanw	Remove a couple of fixed items.
1.1.2.9	28-Jan-2002	nathanw	Update a bit.
1.1.2.8	16-Nov-2001	thorpej	Note that real flockfile()/funclockfile()/ftrylockfile() routines need to be written.
1.1.2.7	08-Aug-2001	nathanw	pthread_malloc() and pthread_free() are superfluous.
1.1.2.6	08-Aug-2001	nathanw	Fixed one.
1.1.2.5	08-Aug-2001	nathanw	Another open issue.
1.1.2.4	07-Aug-2001	nathanw	Add a bug I don't feel like fixing tonight.
1.1.2.3	06-Aug-2001	nathanw	Update and reorganize.
1.1.2.2	08-Mar-2001	nathanw	Couple more things.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.8.2.3	10-Sep-2007	skrll	Sync with HEAD.
1.8.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.8.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.9.2.2	04-Aug-2007	ad	Update.
1.9.2.1	04-Aug-2007	ad	file TODO was added on branch matt-mips64 on 2007-08-04 13:46:05 +0000
1.10.2.3	23-Mar-2008	matt	sync with HEAD
1.10.2.2	09-Jan-2008	matt	sync with HEAD
1.10.2.1	06-Nov-2007	matt	sync with HEAD
1.16.6.1	17-Apr-2012	yamt	sync with head
1.17.26.1	21-Apr-2017	bouyer	Sync with HEAD
1.17.22.1	20-Mar-2017	pgoyette	Sync with HEAD
1.18.4.1	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #234): sys/arch/amd64/include/vmparam.h: revision 1.43 sys/kern/exec_subr.c: revision 1.79 lib/libpthread/pthread_int.h: revision 1.94 sys/arch/mips/include/vmparam.h: revision 1.58 sys/arch/mips/include/vmparam.h: revision 1.59 lib/libpthread/TODO: revision 1.19 sys/arch/powerpc/include/vmparam.h: revision 1.20 sys/arch/riscv/include/vmparam.h: revision 1.2 sys/arch/riscv/include/vmparam.h: revision 1.3 sys/arch/i386/include/vmparam.h: revision 1.85 tests/lib/libpthread/t_join.c: revision 1.9 sys/uvm/uvm_meter.c: revision 1.66 sys/uvm/uvm_param.h: revision 1.36 sys/kern/exec_subr.c: revision 1.80 sys/uvm/uvm_param.h: revision 1.37 sys/kern/exec_subr.c: revision 1.81 sys/kern/exec_subr.c: revision 1.82 lib/libpthread/pthread_attr_getguardsize.3: revision 1.4 lib/libpthread/pthread.c: revision 1.148 lib/libpthread/pthread_attr.c: revision 1.17 sys/arch/amd64/include/vmparam.h: revision 1.42 Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Revert for the moment, creates problems on i386. Recommit exec_subr.c revision 1.79: Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Additionally, change VM_DEFAULT_ADDRESS_TOPDOWN to include user_stack_guard_size in the size reservation. Update VM_DEFAULT_ADDRESS32_TOPDOWN to include guard area. Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.1	31-Mar-2013	agc	branches: 1.1.2; file Version.map was initially added on branch agc-symver.
1.1.2.1	31-Mar-2013	agc	add symbol versioning information for libpthread
1.10	25-Feb-2025	riastradh	libpthread/affinity.3: Fix error reporting in example. pthread_setaffinity_np does not set errno, so err(...) is wrong. Instead, it returns the error number, which requires either errc(..., error, ...) or errno = error; err(...).
1.9	21-Feb-2025	wiz	slightly expand example
1.8	05-Dec-2011	wiz	branches: 1.8.52; Do not xref to itself.
1.7	04-Dec-2011	jym	Improvements in secmodel(9). Document secmodel_register(9), _deregister(9) and _eval(9). Add secmodel_extensions(9), and indicate the new sysctl(7) to let ordinary users control the CPU affinity (user_set_cpu_affinity).
1.6	09-Jul-2010	wiz	branches: 1.6.6; Sort sections.
1.5	09-Jul-2010	jruoho	Add a compatibility note. Also some minor improvements.
1.4	20-Jan-2009	rmind	- Make thread-affinity and processor-set interfaces mutually exlusive. - pset_assign: when CPU is assigned, migrate out all LWPs from it.
1.3	18-Oct-2008	rmind	branches: 1.3.2; 1.3.4; Do not recommend to mix affinity(3) with pset(3).
1.2	12-Sep-2008	rmind	Arguments were swapped for cpuset_set(), cpuset_clr(), cpuset_isset() functions, but man pages were not updated (hi Christos!).
1.1	16-Jun-2008	rmind	branches: 1.1.2; 1.1.4; - Add affinity(3) manual page, which describes thread affinity, pthread_setaffinity_np(3) and pthread_getaffinity_np(3) functions, provides simple code example. - Add cpuset(3) manual page, which describes API of CPU-sets. Thanks <wiz> for many improvements!
1.1.4.3	24-Sep-2008	wrstuden	Merge in changes between wrstuden-revivesa-base-2 and wrstuden-revivesa-base-3.
1.1.4.2	23-Jun-2008	wrstuden	Add files to branch that were added on -current. After this, all that's left of update is to merge some changes that had conflicts.
1.1.4.1	16-Jun-2008	wrstuden	file affinity.3 was added on branch wrstuden-revivesa on 2008-06-23 05:02:11 +0000
1.1.2.2	17-Jun-2008	yamt	sync with head.
1.1.2.1	16-Jun-2008	yamt	file affinity.3 was added on branch yamt-pf42 on 2008-06-17 09:13:39 +0000
1.3.4.2	18-Oct-2008	rmind	Do not recommend to mix affinity(3) with pset(3).
1.3.4.1	18-Oct-2008	rmind	file affinity.3 was added on branch christos-time_t on 2008-10-18 03:37:42 +0000
1.3.2.1	22-Jan-2009	snj	Pull up following revision(s) (requested by rmind in ticket #291): lib/libpthread/affinity.3: revision 1.4 lib/librt/pset.3: revision 1.8 sys/kern/sys_pset.c: revision 1.10 sys/kern/sys_sched.c: revision 1.32 - Make thread-affinity and processor-set interfaces mutually exlusive. - pset_assign: when CPU is assigned, migrate out all LWPs from it.
1.6.6.1	17-Apr-2012	yamt	sync with head
1.8.52.1	02-Aug-2025	perseant	Sync with HEAD
1.2	27-Apr-2019	wiz	branches: 1.2.2; Fix some typos, improve wording.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	27-Apr-2019	christos	file call_once.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.2	24-Apr-2019	kamil	branches: 1.2.2; Drop error path from C11 call_once The original implementation of C11 threads(3) contained check for error paths, but it was stripped in the calls that are documented to return no status from an operation. Do the same in call_once(3).
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	24-Apr-2019	christos	file call_once.c was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.3	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.2	27-Apr-2019	wiz	branches: 1.2.2; 1.2.14; Fix some typos, improve wording.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.14.1	02-Aug-2025	perseant	Sync with HEAD
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	27-Apr-2019	christos	file cnd.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.1	24-Apr-2019	kamil	branches: 1.1.2; Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.1.2.2	10-Jun-2019	christos	Sync with HEAD
1.1.2.1	24-Apr-2019	christos	file cnd.c was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.8	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.7	02-Mar-2007	ad	branches: 1.7.6; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	14-Dec-2006	ad	Set _IOLBF on stdout.
1.5	20-Aug-2003	martin	Include <stdlib.h> for exit() prototype.
1.4	25-Jun-2003	nathanw	More printf format size tweaks.
1.3	27-Jan-2003	nathanw	printf format fixes.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	17-Jul-2001	nathanw	branches: 1.1.2; file debuglog.c was initially added on branch nathanw_sa.
1.1.2.4	20-May-2002	nathanw	Add a way to dump the raw debuglog. Use fwrite() instead of printf() so that we get the entire log if, somehow, there is a NUL in the log. Add a flag to keep the log and not update the read pointer.
1.1.2.3	31-Jul-2001	nathanw	Use the new "force" argument to pthread__debuglog_init(), and remove the copy of the buffer-initialization code.
1.1.2.2	24-Jul-2001	nathanw	Instead of always doing the equivalent of tail -f on the log, add a -f option to do that and make the default simply to display the log. Add a -i option to initialize (clear) the log. Oh, and add getopt framework and usage().
1.1.2.1	17-Jul-2001	nathanw	Add a mechanisim for debugging that is less likely to change scheduling behaviour than using printf (writing to a shared memory segment), and a simple tool for dumping the buffer. Partly inspired by the kernel msgbuf code.
1.7.6.1	09-Jan-2008	matt	sync with HEAD
1.4	30-May-2005	thorpej	Use TOOL_GENASSYM. Part of PR toolchain/30350
1.3	15-Dec-2003	jmc	Clean up tmp files on exit. Fixes PR#23723
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file genassym.sh was initially added on branch nathanw_sa.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.3	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.2	27-Apr-2019	wiz	branches: 1.2.2; 1.2.14; Fix some typos, improve wording.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.14.1	02-Aug-2025	perseant	Sync with HEAD
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	27-Apr-2019	christos	file mtx.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.1	24-Apr-2019	kamil	branches: 1.1.2; Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.1.2.2	10-Jun-2019	christos	Sync with HEAD
1.1.2.1	24-Apr-2019	christos	file mtx.c was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.18	23-Oct-2017	wiz	Remove superfluous Tn.
1.17	08-Feb-2017	kamil	libpthread_dbg(3) deletion from the base distribution libpthread_dbg(3) is a remnant library from the M:N thread model (pre-NetBSD-5.0) API to introspect threads within a process and for use of debuggers. Currently in the 1:1 model it's not used in GDB neither in LLDB and it's not either planned to be used. It's current function to read pthread_t structures is realizable within a regular debugger capable to instrospect objects within a tracee (GDB, LLDB...). Remaining users of this API can still use this library from pkgsrc/devel/libpthread_dbg. Sponsored by <The NetBSD Foundation>
1.16	24-Nov-2016	wiz	branches: 1.16.2; Bump date for previous.
1.15	22-Nov-2016	kamil	Add reference in SEE ALSO to pthread_dbg(3) Sponsored by <The NetBSD Foundation>
1.14	16-May-2010	jruoho	branches: 1.14.28; Add the Butenhof's book to SEE ALSO. (It was decent enough when I read it years ago, but if there are better ones, please feel free to add those.)
1.13	16-May-2010	jruoho	Enumerate the functions in a table instead of a big SEE ALSO. Also some stylistic changes.
1.12	05-Oct-2009	rmind	pthread(3): mention that we use 1:1 threading model; remove descriptions of no longer used environment variables.
1.11	16-Apr-2009	wiz	Add CAVEATS section: Due to limitations in the current pthread implementation, makecontext(3) and sigaltstack(2) should not be used in programs which link against libpthread (whether threads are used or not). Wording from drochner@ and ad@ Bump date for man pages. Add note in libpthread/README so it's not forgotten to update the man pages when the problem is fixed.
1.10	11-Apr-2009	wiz	Remove trailing whitespace.
1.9	08-Oct-2008	ad	branches: 1.9.2; 1.9.4; 1.9.6; Clarifications for PTHREAD_DIAGASSERT.
1.8	09-May-2008	wiz	Assign to TNF. Make 2-clause instead of 3. Ok: co-copyright owner hubertf@.
1.7	19-Nov-2007	ad	branches: 1.7.6; 1.7.8; Sync with reality, and note that programs must link against the dynamic libpthread in order to remain compatible with future releases of NetBSD.
1.6	19-May-2007	wiz	branches: 1.6.6; Remove scheduler activations references. Bump date.
1.5	05-Mar-2007	ad	- Sync with reality. - Minor cosmetic changes.
1.4	01-Feb-2005	daniel	Document PTHREAD_CONCURRENCY, ack by wiz@.
1.3	27-Nov-2003	cl	branches: 1.3.2; 1.3.4; Set default stack size to the current limit on the stack size as set with the shell's command to change limits. Make the PTHREAD_STACKSIZE environment variable override the default stack size. The old fixed stack size behaviour can be enable with PT_FIXEDSTACKSIZE_LG when building libpthread.
1.2	26-Jul-2003	salo	netbsd.org->NetBSD.org
1.1	24-Jul-2003	wiz	Add pthread(3), based on one by Hubert Feyrer, improved by yours truly, reviewed by Nathan J. Williams.
1.3.4.1	17-Mar-2005	tron	Pull up revision 1.4 (requested by daniel in ticket #1166): Document PTHREAD_CONCURRENCY, ack by wiz@.
1.3.2.1	17-Mar-2005	tron	Pull up revision 1.4 (requested by daniel in ticket #1166): Document PTHREAD_CONCURRENCY, ack by wiz@.
1.6.6.1	09-Jan-2008	matt	sync with HEAD
1.7.8.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.7.6.1	18-May-2008	yamt	sync with head.
1.9.6.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.9.4.2	08-Oct-2008	ad	Clarifications for PTHREAD_DIAGASSERT.
1.9.4.1	08-Oct-2008	ad	file pthread.3 was added on branch christos-time_t on 2008-10-08 10:11:12 +0000
1.9.2.1	25-Apr-2009	snj	Pull up following revision(s) (requested by rmind in ticket #727): lib/libc/gen/makecontext.3: revision 1.6 lib/libc/sys/sigaltstack.2: revision 1.22 lib/libpthread/pthread.3: revision 1.11 Add CAVEATS section: Due to limitations in the current pthread implementation, makecontext(3) and sigaltstack(2) should not be used in programs which link against libpthread (whether threads are used or not). Wording from drochner@ and ad@ Bump date for man pages.
1.14.28.2	20-Mar-2017	pgoyette	Sync with HEAD
1.14.28.1	07-Jan-2017	pgoyette	Sync with HEAD. (Note that most of these changes are simply $NetBSD$ tag issues.)
1.16.2.1	21-Apr-2017	bouyer	Sync with HEAD
1.188	06-Oct-2025	riastradh	libc: Expose some more pthread stubs. Additionally, provide the option for pthread.h to expose pthread_create so that libc can provide a weak stub for it, if you define _NETBSD_PTHREAD_CREATE_WEAK. This allows libraries to use the functions without linking against libpthread for applications that don't need threads. For example, with OpenSSL's libcrypto, as long as you don't try to raise OSSL_set_max_threads above 0, it won't ever try pthread_create. New pthread.h macros defined: pthread_attr_destroy __libc_thr_attr_destroy pthread_attr_init __libc_thr_attr_init pthread_attr_setdetachstate __libc_thr_attr_setdetachstate pthread_detach __libc_thr_detach pthread_join __libc_thr_join New pthread.h macros defined if _NETBSD_PTHREAD_CREATE_WEAK is defined first: pthread_create __libc_thr_create New symbols defined by libc as weak aliases for stubs that always fail but can be overridden by libpthread: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that libc already defined __libc_thr_create. New internal stubs, not for overriding: __libc_thr_detach_stub __libc_thr_join_stub These were formerly called __libc_pthread_detach and __libc_pthread_join, respectively, and libc has defined weak aliases pthread_detach and pthread_join for them since 2013. I retained all four of those symbols, but defined new ones in the __ namespace that match the pattern for other thread stubs to avoid raising questions about why the pattern seems to be broken. I left a comment noting this fact too. New pthread strong aliases to override the libc symbols: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that pthread already defined a strong __libc_thr_create alias for the real pthread_create, so there is no need to add a new one. PR lib/59685: libcrypto should not depend on libpthread
1.187	02-Apr-2025	riastradh	pthread_cancel(3): Use _Atomic consistently with C11 atomics. Should fix clang build: /home/source/ab/HEAD-llvm/src/lib/libpthread/pthread.c:1264:8: error: address argument to atomic operation must be a pointer to _Atomic type ('volatile unsigned int *' invalid) (atomic_load_relaxed(&self->pt_cancel) & ^ ~~~~~~~~~~~~~~~~ /home/source/ab/HEAD-llvm/src/lib/libpthread/pthread.c:74:2: note: expanded from macro 'atomic_load_relaxed' atomic_load_explicit(p, memory_order_relaxed) ^ ~ /home/builds/ab/HEAD-llvm/amd64/202504020240Z-dest/usr/include/clang-13.0/stdatomic.h:121:30: note: expanded from macro 'atomic_load_explicit' #define atomic_load_explicit __c11_atomic_load PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.186	31-Mar-2025	riastradh	pthread_cancel(3): Rework. Make pthread_setcancelstate(3) async-signal-safe. (As a side effect, this also makes pthread_setcanceltype(3) async-signal-safe, although that is not required.) PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.185	08-Jun-2024	hannken	branches: 1.185.2; Fix resource leak in pthread_create(). Pthread field "pt_lwpctl" must not be accessed after _lwp_exit() as the kernel may free it, attach it to another thread and change its "lc_curcpu". The "pthread__deadqueue" will fill up with pthreads with an invalid "pt_lwpctl" and allocated stack that never get reused. Replace the test "lc_curcpu == LWPCTL_CPU_EXITED" with test "_lwp_kill(newthread->pt_lid, 0) == -1 && errno == ESRCH" to make sure this thread has finished its _lwp_exit(). PR lib/57831 "Memory leaks in libpthread/libc"
1.184	28-Nov-2023	riastradh	pthread: Don't adjust user-allocated stack addresses by guardsize. PR lib/57721 XXX pullup-10 XXX pullup-9 XXX pullup-8
1.183	07-Sep-2023	ad	raise() has understood threads for a long time, don't reimplment it.
1.182	24-Mar-2023	joerg	Use snprintf_ss in pthread__assertfunc and update comment in pthread__errorfunc. snprintf can use locks in some code paths and we only care about the restricted subset here.
1.181	31-May-2022	riastradh	branches: 1.181.2; libpthread(3): Fix a marvellous interaction with rtld. Patch from chs@. Comment explaining the story by me. This patch may not be optimal -- maybe it would be better in pthread__init, or better for rtld to call _lwp_unpark after _lwp_park in the contened case -- but we've tested this version and it's annoying to reproduce, so let's take this version and worry about testing improvements later.
1.180	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.179	13-Apr-2021	mrg	fake-use alloca()'s return value to quieten -Werror=unused-result
1.178	22-Jul-2020	msaitoh	s/reseting/resetting/
1.177	14-Jun-2020	ad	Don't need to ignore ESRCH from _lwp_park() any more.
1.176	11-Jun-2020	ad	Drop self->pt_lock before clearing TSD / malloc TSD.
1.175	10-Jun-2020	ad	- Make pthread_condvar and pthread_mutex work on the stack rather than in pthread_t, so there's less chance of bad things happening if someone calls (for example) pthread_cond_broadcast() from a signal handler. - Remove all the deferred waiter handling except for the one case that really matters which is transferring waiters from condvar -> mutex on wakeup, and do that by splicing the condvar's waiters onto the mutex. - Remove the mutex waiters bit as it's another complication that's not strictly needed.
1.174	04-Jun-2020	joerg	If _malloc_thread_cleanup is implement, call it from libpthread. Provide the hook from modern jemalloc to avoid using TSD for the thread destruction cleanup as it can result in reentrancy crashes if fork is called from a thread that never called malloc as it will result in a late malloc from the pre-fork synchronisation handler.
1.173	03-Jun-2020	ad	Deal with a couple of problems with threads being awoken early due to timeouts or cancellation where: - The restarting thread calls _lwp_exit() before another thread gets around to waking it with _lwp_unpark(), leading to ESRCH (observed by joerg@). (I may have removed a similar check mistakenly over the weekend.) - The restarting thread considers itself gone off the sleep queue but at the same time another thread is part way through waking it, and hasn't fully completed that operation yet by setting thread->pt_mutexwait = 0. I think that could have potentially lead to the list of waiters getting messed up given the right circumstances.
1.172	02-Jun-2020	joerg	Pass down errno when calling pthread__errorfunc after a system call. Allow format arguments for that reason and use (v)snprintf_ss in pthread_errorfunc to avoid race conditions and the like.
1.171	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.170	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.169	15-May-2020	joerg	Lock/unlock/reinit pthread__deadqueue_lock over fork.
1.168	14-Apr-2020	joerg	Drop most of the logic associated with pthread__started. The pthread_cond logic is a questionable optimisation at best and the post-fork logic is plainly broken.
1.167	16-Feb-2020	kamil	Revert "Enhance the pthread(3) + malloc(3) init model" It is reported to hand on aarch64 with gzip.
1.166	16-Feb-2020	kamil	Set __isthreaded before bootstrapping malloc(3) jemalloc depends on the __isthreaded dynamic state logic. Reported by <wiz> for mpv and by <tih> for gzip.
1.165	15-Feb-2020	kamil	Enhance the pthread(3) + malloc(3) init model Separate the pthread_atfork(3) call from pthread_tsd_init() and move it into a distinct function. Call inside pthread__init() late TSD initialization route, just after "pthread_atfork(NULL, NULL, pthread__fork_callback);". Document that malloc(3) initialization is now controlled again and called during the first pthread_atfork(3) call. Remove #if 0 code from pthread_mutex.c as we no longer initialize malloc prematurely.
1.164	08-Feb-2020	kamil	Change the behavior of pthread_equal() On error when not aborting, do not return EINVAL as it has a side effect of being interpreted as matching threads. For invalid threads return unmatched. Check pthreads for NULL, before accessing pt_magic field. This avoids faults on comparision with a NULL pointer. This behavior is in the scope of UB, but should be easier to deal with buggy software.
1.163	05-Feb-2020	ryoon	Remove trailing whiteapaces and tab
1.162	29-Jan-2020	ad	- pthread_join(): remove temporary hack now kernel returns correct errno. - kill(getpid(), SIGABRT) -> _lwp_kill(_lwp_self(), SIGABRT)
1.161	29-Jan-2020	kamil	Chack thread->pt_magic with PT_MAGIC promptly Rearrange some checks to avoid verifying pthread_t after using it.
1.160	29-Jan-2020	kamil	Revert previous Two assignments are correct.
1.159	29-Jan-2020	kamil	Do not set stackbase2 twice for !__MACHINE_STACK_GROWS_UP
1.158	28-Jan-2020	ad	pthread_join(): add a temporary hack to make lib/libpthread/t_detach pass. The correct fix is to do this in kernel (I have that change, but it's part of the wider change to index LWPs in a tree).
1.157	27-Jan-2020	ad	pthread_detach(), pthread_join(): go back to using _lwp_detach() and _lwp_wait(), rather than doing it all in userspace. There's less to go wrong. Doesn't seem to be a performance penalty.
1.156	25-Jan-2020	ad	pthread_exit(): it looks there there is at least one path through which a thread can exit with waiters still hanging off it (cancellation when waiting on a condvar) so deal with all/any crappy failure like that and make sure there are never any waiters left before exiting. Maybe of help for: PR: bin/50350: rump/rumpkern/t_sp/stress_{long,short} fail on Core 2
1.155	25-Jan-2020	ad	- Fix a race between the kernel and libpthread, where a new thread can start life without its self->pt_lid being filled in. - Fix an error path in _lwp_create(). If the new LID can't be copied out, then get rid of the new LWP (i.e. either succeed or fail, not both). - Mark l_dopreempt and l_nopreempt volatile in struct lwp.
1.154	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.153	05-Mar-2019	christos	branches: 1.153.2; Transfer all the keys that were created in the libc stub implementation to the pthread tsd implementation when the main thread is created. This corrects a problem where a process created keys before libpthread was loaded (either from the libc constructor or because libpthread was dlopened later). This fixes a problem with jemalloc which creates keys in the constructor.
1.152	19-Aug-2018	kamil	Drop a duplicate instruction line No functional change intended.
1.151	08-Dec-2017	kre	branches: 1.151.2; 1.151.4; Deal with more lwp_park() timestamp unconsting
1.150	11-Jul-2017	joerg	Implement __cxa_thread_atexit and __cxa_thread_atexit_impl. This functions are used for destructors of thread_local objects. If a pending destructor exists, prevent unloading of shared objects. Introduce __dl_cxa_refcount interface for this purpose. When the last reference is gone and the object has been dlclose'd before, the unloading is finalized. Ideally, __cxa_thread_atexit_impl wouldn't exist, but libstdc++ insists on providing __cxa_thread_atexit as direct wrapper without further patching.
1.149	02-Jul-2017	joerg	Do not look at environmental variables for suid/guid binaries.
1.148	02-Jul-2017	joerg	Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.147	29-May-2015	christos	branches: 1.147.8; Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly.
1.146	29-May-2015	manu	Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256.
1.145	16-Dec-2014	pooka	Allow for arbitrary MI scheduler implementations. A concrete result is enabling unpatched libpthread to run on the rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler. Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall interfaces (well, "syscall" interfaces in that scenario ;) More specifically about the change itself: 1) instead of calling _lwp_makecontext() followed by _lwp_create() and passing the entry point in ucontext_t (MD) through the calls, roll the calls into pthread__makelwp() and allow alternate implementations for that MI interface. 2) allow compile-time overriding of __lwp_gettcb_fast() or __lwp_getprivate_fast, which are inline and leak MD scheduler/thread details into libpthread Additionally, two small nits: I) define LIB=pthread before including mk.conf so that it's possible to test for LIB==pthread in mk.conf II) make it possible to leave out pthread_cancelstub.c. This is required by the current implementation of rumprun-posix (i.e. rumprun on POSIX hosts) due to symbol collisions. It needs to be fixed properly some day, but for now allows an almost-correct libpthread to run. I am sure @justin will be happy to explain the details ;) no change to NetBSD tested: anita+atf
1.144	31-Jan-2014	christos	branches: 1.144.4; remove compatibility code for handling CLOCK_MONOTONIC and handle it in the syscall directly.
1.143	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.142	01-Jan-2013	dsl	Don't rely on sys/lwp.h includeing sys/resource.h for us.
1.141	14-Nov-2012	christos	add argsused
1.140	06-Nov-2012	apb	Remove duplicate "const" modifier found by clang -Wduplicate-decl-specifier
1.139	03-Nov-2012	rmind	libpthread: replace the use of obsolete sys/tree.h interface with rbtree(9).
1.138	03-Nov-2012	christos	cast return of sysconf
1.137	15-Aug-2012	drochner	branches: 1.137.2; return errno if pthread_create hits the system limit, not just -1 (this is not entirely correct because it can return ENOMEM which is not mentioned in the spec, but there are other places in pthread_create whete ENOMEM is returned -- it at all, this should be fixed everywhere)
1.136	02-Aug-2012	joerg	Prefer sysconf to obtain number of CPUs.
1.135	04-May-2012	joerg	Simplify check for TLS definition to not hide code. Drop it in another place as it is redundant.
1.134	26-Apr-2012	enami	Store allocated lwpctl state in the thread actually forked, which is the only thread lives in the child process. The problem originally reported here: https://bugs.ruby-lang.org/issues/6341
1.133	22-Mar-2012	drochner	don't reuse a dynamically allocated stack if a fixed one is requested
1.132	12-Mar-2012	joerg	Keep track of the size of the guard area, in case we want to make it modifiable later. Only reuse the stack if it was allocated by libpthread and if the expected thread size matches the current stack size.
1.131	12-Mar-2012	joerg	Further refine stack allocation. If the stack was provided by the user, don't bother with setting up a guard page. Otherwise, round up the size to page size. Point stack inside the guarded area, without the guard page. Fix size when mprotect failed.
1.130	10-Mar-2012	joerg	Use correct size.
1.129	09-Mar-2012	drochner	-fix initial stacksize rounding -minor indentation fix
1.128	08-Mar-2012	joerg	Actually use the stack thread attributes when creating a new thread.
1.127	08-Mar-2012	joerg	Fix the stack base pointer for the initial thread on !HPPA. AT_STACKBASE is pointing to the start of the stack, which is the upper limit on platforms where the stack grows down.
1.126	02-Mar-2012	joerg	Separate pthread_t from thread stack. Drop additional alignment restrictions on the thread stack. Remove remaining parts of stackid.
1.125	02-Oct-2011	christos	branches: 1.125.2; 1.125.4; put back pthread__dbg variable; this is set to no zero by td_open() when debugging to avoid multiple td_open() mess.
1.124	16-Sep-2011	joerg	Use __dead
1.123	30-Mar-2011	joerg	Rework TLS initialisation: - Update TCB for the initial thread in pthread__initthread, not pthread__init to get it valid as soon as possible. - Don't overwrite the pt_tls field in pthread__initthread. - Don't deallocate pt_tls in pthread__scrubthread. This worked more by chance than by design. - Handle freeing the TLS area in pthread_create after removing the thread instance from the dead queue.
1.122	12-Mar-2011	matt	Use __lwp_gettcb_fast if present.
1.121	09-Mar-2011	joerg	Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports _rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to setup the thread private area of all new threads. ld.elf_so is responsible for setting up the private area for the initial thread. Similar functions are called from _libc_init for static binaries, using dl_iterate_phdr to access the ELF Program Header. Add test cases to exercise the different TLS storage models. Test cases are compiled and installed on all platforms, but are skipped on platforms not marked for TLS support. This material is based upon work partially supported by The NetBSD Foundation under a contract with Joerg Sonnenberger. It is inspired by the TLS support in FreeBSD by Doug Rabson and the clean ups of the DragonFly port of the original FreeBSD modifications.
1.120	22-Dec-2010	christos	use pthread__stacksize since size has not been initialized yet.
1.119	22-Dec-2010	christos	only mprotect base if we moved it.
1.118	18-Dec-2010	christos	I've had this patch in my tree for a while and since it only improves the situation, I decided to commit it. There is an inherent problem with ASLR and the way the pthread library is using the thread stack. Our pthread library chooses that stack for each thread strategically so that it can locate the location of the pthread struct for each thread by masking the stack pointer and looking just below the red zone it creates. Unfortunately with ASLR you get many random values for the initial stack, and there are situations where the masked stack base ends up below the base of the stack. (this happens on x86 when the stack base happens to be 0x???02000 for example and your mask is stackmask is 0xffe00000). To fix this, we detect the pathological cases (this happens only in the main thread), allocate more stack, and mprotect it appropriately. Then we stash the main base and the main struct, so that when we look for the pthread struct in pthread__id, we can special case the main thread. Another way to work around the problem is unlimiting stacksize, but the proper way is to use TLS to find the thread structure and not to play games with the thread stacks.
1.117	14-Nov-2010	tron	Don't use internal libc function __findenv().
1.116	08-Jul-2010	rmind	pthread_create: simplify error path slightly.
1.115	25-Mar-2010	explorer	fix the pthread pt_lid in the fork callback function that runs in the child instead of a function that may be going away. KNFify
1.114	24-Mar-2010	explorer	Correctly set pt_lid in the child, after a fork
1.113	03-Oct-2009	christos	Don't just look only at the first element in the deadqueue to find lwp's to reuse, because if we lose the race with the kernel we are never going to reuse any elements. Look in the whole list instead. XXX: should be pulled up to 5.x
1.112	02-Jul-2009	joerg	Restore use of _lwp_makecontext, the AMD64 bug has been fixed.
1.111	25-Jun-2009	joerg	Partially revert 1.110: Use makecontext again until the problems with _lwp_makecontext are solved.
1.110	17-May-2009	ad	- Convert from makecontext() -> _lwp_makecontext(). - Rely on _lwp_makecontext() to set up the thread identity register. This is not currently done (a bug), nor does libpthread use the threadreg yet. I'm doing this so it the code can be used by the person working on TLS to verify that their threadreg code is working.
1.109	01-Apr-2009	drochner	Fix the comparision function used by the red-black tree global thread list implementation: -don't return a difference, this can overflow -don't try to substract typed pointers which don't belong to the same object, this gives undefined results This fixes instabilities of programs which use more than a handful of threads, eg spuriously failing pthread_join().
1.108	30-Mar-2009	ad	Revert the _lwp_ctl which is causing problem. I did test this locally, I guess not well enough.
1.107	29-Mar-2009	ad	- Make the threadreg code use _lwp_setprivate() instead of MD hooks. XXX This must not be enabled by default because the LWP private mechanism is reserved for TLS. It is provided only as a test/demo. XXX Since ucontext_t does not contain the thread private variable, for a short time after threads are created their thread specific data is unset. If a signal arrives during that time we are screwed. - No longer need pthread__osrev. - Rearrange _lwp_ctl() calls slightly.
1.106	08-Oct-2008	ad	branches: 1.106.2; 1.106.4; 1.106.6; Disable diagnostic assertions by default and just return error codes like other systems. Allows poorly written applications to appear working. If you are developing pthread apps please turn it on manually by setting the environment variable.
1.105	02-Aug-2008	matt	Change some type to eliminate some lint warnings.
1.104	28-Jun-2008	ad	Minor correction to previous.
1.103	28-Jun-2008	ad	Now that we have all the scheduling gunk, make these do something useful: pthread_attr_get_np pthread_attr_setschedparam pthread_attr_getschedparam pthread_attr_setschedpolicy pthread_attr_getschedpolicy
1.102	25-Jun-2008	ad	pthread_join: explicitly test for cancellation.
1.101	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.100	28-Apr-2008	martin	branches: 1.100.2; Remove clause 3 and 4 from TNF licenses
1.99	22-Mar-2008	ad	branches: 1.99.2; Back out previous. It seems to expose another bug in libpthread/libc, potentially errno being used before threading is up and running.
1.98	21-Mar-2008	ad	Move pthread__errno() into pthread_specific.c so it gets the "no stack frame" treatment.
1.97	08-Mar-2008	ad	Complain if _lwp_ctl() fails.
1.96	08-Jan-2008	christos	branches: 1.96.2; add missing static decls.
1.95	24-Dec-2007	ad	- Use pthread__cancelled() in more places. - pthread_join(): assert that pthread_cond_wait() returns zero.
1.94	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.93	11-Dec-2007	ad	Remove test of pthread__osrev that is no longer needed.
1.92	04-Dec-2007	yamt	remove unnecessary assignments.
1.91	01-Dec-2007	ad	- On 64-bit platforms 1/2 the default tsd values were garbage. Fix it. - The lwpctl block is now needed on uniprocessors, for pthread_curcpu_np().
1.90	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.89	14-Nov-2007	drochner	Add pthread_equal() to libc stubs; this makes a lot of sense for threadsafe libraries implementing own locking functions. Ride on yesterday's minor version bumps.
1.88	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.87	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.86	07-Nov-2007	ad	Use _lwp_setname() to pass thread names to the kernel.
1.85	16-Oct-2007	ad	... but preserve the linked list, for the debugger only.
1.84	16-Oct-2007	ad	Replace the global thread list with a red-black tree. From joerg@.
1.83	11-Sep-2007	ad	Put new threads on the tail of pthread__allqueue, for the debugger.
1.82	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.81	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.80	23-Aug-2007	ad	branches: 1.80.2; Acquire the correct lock in pthread_detach(). Spotted by Jan Kryl.
1.79	17-Aug-2007	ad	pthread_suspend_np, pthread_resume_np, pthread_detach: return correct code on error.
1.78	16-Aug-2007	ad	Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.77	16-Aug-2007	ad	- Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.76	16-Aug-2007	ad	Remove PT_FIXEDSTACKSIZE_LG.
1.75	16-Aug-2007	ad	Cache thread context for creation instead of setting it up every time. Speeds create/join loop by about 10-15% on i386.
1.74	15-Aug-2007	ad	Simplify pthread_join(). Knocks about 5% off pthread_create/join in a loop.
1.73	07-Aug-2007	ad	Missed variable rename..
1.72	07-Aug-2007	ad	Change the signature of _lwp_park() to accept an lwpid_t and second hint pointer, but do so in a way that remains compatible with older pthread libraries. This can be used to wake another thread before the calling thread goes asleep, saving at least one syscall + involuntary context switch. This turns out to be a fairly large win on the condvar benchmarks that I have tried.
1.71	04-Aug-2007	ad	branches: 1.71.2; Make libpthread_dbg build again.
1.70	04-Aug-2007	ad	Fix error in previous.
1.69	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.68	24-Mar-2007	ad	branches: 1.68.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.67	14-Mar-2007	ad	- pthread__park: always check for cancellation. - pthread__unpark: cosmetic changes.
1.66	05-Mar-2007	ad	- Simplify the interface to pthread__park() and friends slightly. - If sysctl() fails, complain.
1.65	02-Mar-2007	ad	Silence a gcc/lint warning.
1.64	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.63	02-Mar-2007	ad	pthread_detach: acquire the join lock before changing pt_flags.
1.62	21-Feb-2007	ad	- Put detached & exiting threads on the tail of the deadqueue, not head. - Don't forget to set PT_FLAG_DETACHED.
1.61	21-Feb-2007	ad	Minor optimisation to previous: only check for continued existence of the thread if it was detached.
1.60	15-Feb-2007	yamt	fix a race between pthread_exit and pthread_create. inefficient, but better than crashing.
1.59	09-Feb-2007	ad	Cast the return value of _lwp_unpark_all(), just in case.
1.58	31-Jan-2007	christos	use __func__ instead of __FUNCTION__ which is a gcc extension.
1.57	20-Jan-2007	ad	pthread_create(): clear newthread->pt_sleeponq before calling _lwp_create().
1.56	20-Jan-2007	christos	add a missing volatile.
1.55	16-Jan-2007	ad	Fix a race between pthread_exit() and pthread_join().
1.54	16-Jan-2007	ad	Fix a race between pthread_create() and pthread_exit() in the 1:1 case.
1.53	16-Jan-2007	ad	Pass in the 'hint' argument when parking/unparking LWPs.
1.52	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.51	23-Dec-2006	ad	Add another comment.
1.50	23-Dec-2006	ad	Add a comment.
1.49	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.48	24-Apr-2006	drochner	branches: 1.48.4; 1.48.6; There is no point in using the internal sigprocmask() to initialize the process' signal mask -- this ends up in a no-op. Use the system call directly instead. (This might be done in pthread_sig.c, but for now I wanted a simple patch which is easily tested and pulled up.)
1.47	12-Feb-2006	yamt	- do PTHREAD_MLOCK_KLUDGE in pthread__stackid_setup, rather than callers, so that the main thread is not different from others. as a side effect, fix memory leak in pthread_create on error. - make pthread__stackid_setup return a error rather than calling err(2).
1.46	19-Oct-2005	chs	if mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.45	19-Oct-2005	chs	starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. I also noticed that there's a "sem2" test that has never worked in its single-threaded form. the problem there is that a signal handler tries to take a sem_t interlock which is already held when the signal is received. fix this too, by adding a single-threaded case for sig_trywait() that blocks signals instead of using the userland interlock.
1.44	16-Oct-2005	chs	in pthread_kill() and pthread_suspend_np(), return without doing anything if the target thread is a zombie. in all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). clean up some debugging stuff.
1.43	16-Oct-2005	chs	in pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. fixes PR 20256, PR 24241, PR 25722, PR 26096.
1.42	01-Jul-2005	yamt	make this compile without PTHREAD_MLOCK_KLUDGE.
1.41	26-Feb-2005	nathanw	branches: 1.41.2; Keep the kernel updated with signal action signal masks (act.sa_mask) until threads are started, since before that the traditional signal invocation method will be used. Fixes regress/lib/libpthread/sigmask2.
1.40	10-Feb-2005	christos	Default back pthread__concurrency to 1 until we fix the regression test related to pthread_kill().
1.39	10-Feb-2005	christos	If $PTHREAD_CONCURRENCY is not set, set it to ncpu
1.38	03-Feb-2005	christos	Add charles' mlock fixes, protected with PTHREAD_MLOCK_KLUDGE and enabled by default, until we come up with a real fix.
1.37	06-Jan-2005	mycroft	Add some additional assertions and debugging printf()s.
1.36	12-Aug-2004	yamt	- fix pthread_detach with an already exit'ed thread. namely, put the thread to deadqueue rather than just leaking it. - fix a race between pthread_detach/join and pthread_exit, which also causes dead thread leaks.
1.35	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.34	25-Jun-2004	drochner	const'ify the arguments to pthread__assertfunc and _errorfunc; needed because the __func__ pseudo-var is strictly "const*" in gcc-3.4
1.33	14-Mar-2004	cl	branches: 1.33.2; add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.32	31-Dec-2003	cl	Handle block/unblock for threads in critical section without sa_unblockyield. XXX g/c sa_unblockyield in kernel later
1.31	18-Dec-2003	christos	PR/23791: Patrick Latify: Fix memory leak on thread creation failure.
1.30	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.29	13-Aug-2003	nathanw	Split out pthread_{set,get}specific() into a separate file and arrange for that file to not be built with profiling. This makes it reasonable to use pthread_{set,get}specific() to implement thread-safe profiline call counts.
1.28	21-Jul-2003	nathanw	Lock accesses to pt_flags and pt_cancel. When disabling cancellation, clear the pt_cancel flag if it was set and note the cancellation request with PT_FLAG_CS_PENDING. This avoids a problem where a cancellation request entered but not acted upon before pthread_setcanclstate(PTHREAD_CANCEL_DISABLE) is called would still be aceted upon before cancellation was re-enabled.
1.27	21-Jul-2003	nathanw	Use _sys_write() instead of write() in the assertion and error functions, to avoid invoking the cancellation machinery in the middle of trying to print an assertion or error message.
1.26	21-Jul-2003	nathanw	Move initialization of variable 'nthreads' so that pthread_exit() from the main thread, with no other threads created, exits cleanly instead of triggering an assertion in pthread_next().
1.25	18-Jul-2003	nathanw	pthread.c was getting a bit unwieldly. Move pthread_attr stuff out into a new file, and put the shared private structure definition in pthread_int.h.
1.24	18-Jul-2003	nathanw	Implement a bunch of pthread_attr_() functions, which genuinely set and examine pthread_attr_t objects, although most of the properties being set don't really affect threads yet: pthread_attr_{get,set}guardsize() pthread_attr_{get,set}inheritsched() pthread_attr_{get,set}scope() pthread_attr_{get,set}stack() pthread_attr_setstack{size,addr}() Remove some useless assertions and error checks in the existing pthread_attr() routines. Implement pthread_attr_get_np(), to examine the attributes of an existing thread. Idea and interface from FreeBSD. Change PTHREAD_ERRORMODE environment variable to PTHREAD_DIAGASSERT, and make it behave like libc's LIBC_DIAGASSERT. The way to disable error-checking and aborting is now "PTHREAD_DIAGASSERT=AEL", rather than "PTHREAD_ERRORMODE=ignore".
1.23	18-Jul-2003	nathanw	Add strong alias for setcancelstate.
1.22	26-Jun-2003	nathanw	Initialize pt_trapuc in pthread__initthread().
1.21	06-Jun-2003	nathanw	Tiny bit of infrastructure for ABI-supported thread-ID storage.
1.20	02-Jun-2003	christos	Add pthread_attr_getstack{,size,addr} needed by jdk
1.19	27-May-2003	christos	pass lint: 1. add new pthread__abort() and change pthread_assert(0) to it. 2. put constcond in the right place (in the macro). 3. no space after pthread__assert macro.
1.18	28-Apr-2003	nathanw	Move call to pthread__alarm_init() from pthread_init() (called at load time) to pthread__start() (called on the first call of pthread_create()), so that there's no opportunity for a fork() to clear the per-process timer. Problem pointed out by a test program from Mihai CHELARU on current-users.
1.17	23-Apr-2003	nathanw	Introduce a pthread__error() macro, for detected application errors as opposed to internal errors. The setting of the PTHREAD_ERRORMODE environment variable determines the runtime behavior. Valid settings are "ignore", "abort", and "print". The default is currently "abort".
1.16	07-Apr-2003	nathanw	When threads are started, register an atfork callback to clear pthread__started in the child process. This lets sleep() work in the child, as required by POSIX.
1.15	10-Mar-2003	nathanw	Re-enable nanosleep(); kernel bug is squished (kern_time.c:1.67).
1.14	08-Mar-2003	lukem	add __RCSID()
1.13	28-Feb-2003	nathanw	Disable userlevel nanosleep() until I find the timer/alarm bug that it is tickling.
1.12	26-Feb-2003	nathanw	In pthread_create(), rearrange name-setting code so that name is set to NULL when the attribute structure does not have a private field allocated.
1.11	26-Feb-2003	thorpej	Add support for naming a thread, using an API compatible with Tru64 Unix: * pthread_attr_getname_np() * pthread_attr_setname_np() * pthread_getname_np() * pthread_setname_np() In addition to being query'able by the application (for log messages, etc.), it is intended that these names can show up in the debugger. Reviewed by nathanw.
1.10	22-Feb-2003	nathanw	In pthread_exit(), clear pt_canceled in addition to setting PT_FLAG_CS_DISABLED in pt_flags. Prevents cancellation cleanup handlers from thinking that they've been canceled and exiting mid-handler. Problem spotted by Matt Thomas.
1.9	15-Feb-2003	nathanw	Define a pthread-specific assert function, pthread__assert(), that bails out without trying to flush stdio buffers.
1.8	31-Jan-2003	nathanw	Use pthread__sched_sleepers() instead of iterating over sleep queues ourself.
1.7	29-Jan-2003	drochner	cosmetics
1.6	25-Jan-2003	nathanw	Make pthread_join() accomodate spurious wakeups from pthread__block().
1.5	19-Jan-2003	thorpej	Add some threadlib stubs that are used by X: * thr_create() (stub in libc aborts) * thr_exit() (stub in libc calls exit()) * thr_yield() (stub in libc does nothing) Also make the libc thr_self() stub not abort. XXX Should we add thrattr_*() stubs for setting the detach-state?
1.4	19-Jan-2003	christos	- constify the get functions - remove argument variable names since they pollute the namespace - add mock implementation of the missing stack functions XXX: we need to do this right [i.e. actually get and set sizes and addresses] but the current stack setup makes this a bit complicated.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread.c was initially added on branch nathanw_sa.
1.1.2.44	11-Jan-2003	nathanw	Add some debug logging to pthread__idle(). Be more agressive about the assertion if we return from sa_yield() by creating an artifical lock-count, so it doesn't get reclaimed mid-assert.
1.1.2.43	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.42	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.41	03-Jan-2003	nathanw	Silent failures are annoying. Sprinkle some assert(0) after NOTREACHED points.
1.1.2.40	02-Jan-2003	nathanw	Oops, left a few too many extern declarations around. (Save buffers before commiting!)
1.1.2.39	02-Jan-2003	nathanw	Clean up the namespace a bit; make a few more things static, and make sure all private globals are prefixed with pthread__.
1.1.2.38	02-Jan-2003	nathanw	Newline police.
1.1.2.37	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.36	20-Dec-2002	nathanw	Set the type of an idle thread to PT_THREAD_IDLE only when it is created, not every time it's scheduled (left over from vestigal any-thread-can-be-idle code).
1.1.2.35	18-Dec-2002	nathanw	Start debugging subsystem later, after the main() thread has been created, so that lockcounts (called back by mutexes locked by libc) aren't referencing garbage.
1.1.2.34	16-Dec-2002	nathanw	More debugging hooks.
1.1.2.33	18-Nov-2002	skrll	Typo in comment.
1.1.2.32	28-Oct-2002	nathanw	Implement sched_yield(). Clean up trailing whitespace.
1.1.2.31	28-Oct-2002	nathanw	As pointed out recently on comp.programming.threads, POSIX requires that pthread_detach() and pthread_join() must return ESRCH, not invoke undefined behavior, even if handed completely nonsensical pthread_t values. So, search through the list of threads to see if the pthread_t value is valid.
1.1.2.30	27-Oct-2002	thorpej	Cosmetic changes.
1.1.2.29	22-Oct-2002	nathanw	Use _INITCONTEXT_U() instead of _getucontext_u() to prime a fresh context.
1.1.2.28	07-Oct-2002	nathanw	Rename started to pthread__started and make it avaliable to other files.
1.1.2.27	07-Oct-2002	nathanw	Comment formatting.
1.1.2.26	14-Aug-2002	nathanw	Infrastructure for machine-dependent init code.
1.1.2.25	20-May-2002	nathanw	Many signal improvements: - Implement sigsuspend() - Take pending signals that are unblocked in pthread_sigmask(). - Tweak the signal mask passed by sigaction() to permit us to manage our own thread-specific signal masks. - Don't try to deliver signals to zombie threads. - Prevent a race between deciding a thread can take a signal and actually taking it. - Don't put threads that are blocked in a syscall on the run queue. - Add debug logging.
1.1.2.24	02-May-2002	nathanw	Different way of integrating with libc: Create a vector type for pthread operations; libc will have a pointer to such a vector. When the pthread library is loaded, set libc's pointer to a vector of real operations. This removes the reliance on weak symbol magic, which didn't work for static binaries, and as an aesthetic side effect, we don't have to export a bunch of ugly _libc_pthread_* wrappers.
1.1.2.23	28-Apr-2002	nathanw	Explicitly set the state of the first thread to RUNNING.
1.1.2.22	26-Apr-2002	nathanw	Track the object (and queue and lock!) when sleeping to join a thread.
1.1.2.21	24-Apr-2002	nathanw	Create pthread IDs.
1.1.2.20	11-Apr-2002	nathanw	Revert weak aliases. Recycle the thread structures and stacks of threads that have been put on on the dead queue, so that pthread_create() ... pthread_join() isn't a resource leak.
1.1.2.19	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.18	01-Mar-2002	nathanw	Loop-hoist a comment.
1.1.2.17	21-Feb-2002	nathanw	Block signals in idle threads.
1.1.2.16	19-Feb-2002	nathanw	Move alarm initialization into pthread_alarms.c.
1.1.2.15	06-Feb-2002	nathanw	Move a couple of debugging declarations to pthread_debug.c, where they belong. Add a debug routine to print the pthread event counters if the environment variable PTHREAD_DEBUGCOUNTERS is set.
1.1.2.14	28-Jan-2002	nathanw	Cancellation support. This includes implementing pthread_cancel() and pthread_testcancel(), making pthread_join() and pthread_cond_wait() cancellation points, introducing new states to distinguish waiting on a sleep queue from waiting in the kernel, and introducing a locking protocol around changing a thread's run state.
1.1.2.13	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t. Implement basic cancellation functions. Implement pthread__errno().
1.1.2.12	25-Sep-2001	nathanw	Use getcontext() instead of _getcontext() before initializing the new thread state with makecontext(), since the callee-save registers saved by _getcontext() may not include the registers needed by makecontext(). Unfortunately, this implies a syscall for every new thread creation.
1.1.2.11	04-Sep-2001	nathanw	#include <string.h> for memset prototype.
1.1.2.10	08-Aug-2001	nathanw	pthread_malloc() and pthread_free() are superfluous.
1.1.2.9	08-Aug-2001	nathanw	Keep track of the total number of normal threads, and exit() from pthread_exit() if the count goes to 0.
1.1.2.8	08-Aug-2001	nathanw	Split pthread__start() into pthread__start() and pthread__init(); pthread__init() is the code that needs to run whenever the thread library is linked in and usable; pthread__start() doesn't run until the first new thread is created.
1.1.2.7	01-Aug-2001	nathanw	Initialize pt_sleepuc and pt_switchto (!).
1.1.2.6	24-Jul-2001	nathanw	Unlock the correct spinlock (Ye gods).
1.1.2.5	17-Jul-2001	nathanw	Add a mechanisim for debugging that is less likely to change scheduling behaviour than using printf (writing to a shared memory segment), and a simple tool for dumping the buffer. Partly inspired by the kernel msgbuf code.
1.1.2.4	17-Jul-2001	nathanw	Create more idle threads. In the current system, we need one for every level of preemption nesting.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Convert to new queue type. Remove a level of indirection in the pthread_attr_t type.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.33.2.1	30-Aug-2004	tron	Pull up revision 1.36 (requested by yamt in ticket #801): - fix pthread_detach with an already exit'ed thread. namely, put the thread to deadqueue rather than just leaking it. - fix a race between pthread_detach/join and pthread_exit, which also causes dead thread leaks.
1.41.2.2	13-May-2006	tron	Pull up following revision(s) (requested by drochner in ticket #1314): lib/libpthread/pthread.c: revision 1.48 There is no point in using the internal sigprocmask() to initialize the process' signal mask -- this ends up in a no-op. Use the system call directly instead. (This might be done in pthread_sig.c, but for now I wanted a simple patch which is easily tested and pulled up.)
1.41.2.1	01-Nov-2005	jmc	Pullup revs 1.43-1.46 (requested by chs in ticket #926) In pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. PR#20256, PR#24241, PR#25722, PR#26096 Fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. PR#30348 In pthread_kill() and pthread_suspend_np(), return without doing anything f the target thread is a zombie. In all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). Starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. If mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.48.6.4	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.48.6.3	19-Oct-2007	wrstuden	Work on cleaning up lock ordering. Turns out that there's not too much to do, other than fixing an issue in join and one I introduced. Add volumous comment in pthread_int.h describing how I understand the current locking to work. pthread_join() considered pt_flaglock to be a higher-priority lock than pt_join_lock. Life makes more sense if we flip that. To not make a lot of routines messy, pthread__runqueue_lock has to be lower in the lock ordering than pt_statelock. Adapt the changes I made to sched_yield() to this ordering. There still is a wart regarding setting the state of a thread we are taking off of the run (or idle) queue. We can't lock its pt_statelock as we have the runqueue lock held. For now, go back to what the old code did which was just write over the info. This isn't that bad as the only things that should be changing the state of this thread should be run-queue savy. I need to check this though....
1.48.6.2	25-Sep-2007	wrstuden	Rename pt_blockedlwp to pt_lastlwp, and set it whenever we switch to a new pthread. This way we always know on what lwp a given thread is running.
1.48.6.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.48.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.68.2.3	10-Sep-2007	skrll	Sync with HEAD.
1.68.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.68.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.71.2.2	04-Aug-2007	ad	Make libpthread_dbg build again.
1.71.2.1	04-Aug-2007	ad	file pthread.c was added on branch matt-mips64 on 2007-08-04 18:54:13 +0000
1.80.2.3	23-Mar-2008	matt	sync with HEAD
1.80.2.2	09-Jan-2008	matt	sync with HEAD
1.80.2.1	06-Nov-2007	matt	sync with HEAD
1.96.2.1	24-Mar-2008	keiichi	sync with head.
1.99.2.2	04-Jun-2008	yamt	sync with head
1.99.2.1	18-May-2008	yamt	sync with head.
1.100.2.2	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.100.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.106.6.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.106.4.2	08-Oct-2008	ad	Disable diagnostic assertions by default and just return error codes like other systems. Allows poorly written applications to appear working. If you are developing pthread apps please turn it on manually by setting the environment variable.
1.106.4.1	08-Oct-2008	ad	file pthread.c was added on branch christos-time_t on 2008-10-08 10:03:29 +0000
1.106.2.5	20-Oct-2013	bouyer	Pull up following revision(s) (requested by riastradh in ticket #1881): lib/libpthread/pthread.c: revision 1.137 via patch return errno if pthread_create hits the system limit, not just -1 (this is not entirely correct because it can return ENOMEM which is not mentioned in the spec, but there are other places in pthread_create whete ENOMEM is returned -- it at all, this should be fixed everywhere)
1.106.2.4	19-May-2012	riz	Pull up following revision(s) (requested by enami in ticket #1753): lib/libpthread/pthread.c: revision 1.134 Store allocated lwpctl state in the thread actually forked, which is the only thread lives in the child process. The problem originally reported here: https://bugs.ruby-lang.org/issues/6341
1.106.2.3	20-May-2010	snj	Pull up following revision(s) (requested by explorer in ticket #1353): lib/libpthread/pthread.c: revision 1.114, 1.115 Correctly set pt_lid in the child, after a fork -- fix the pthread pt_lid in the fork callback function that runs in the child instead of a function that may be going away. KNFify
1.106.2.2	11-Jan-2010	snj	Pull up following revision(s) (requested by christos in ticket #1235): lib/libpthread/pthread.c: revision 1.113 Don't just look only at the first element in the deadqueue to find lwp's to reuse, because if we lose the race with the kernel we are never going to reuse any elements. Look in the whole list instead.
1.106.2.1	03-Apr-2009	snj	branches: 1.106.2.1.4; Pull up following revision(s) (requested by drochner in ticket #648): lib/libpthread/pthread.c: revision 1.109 Fix the comparision function used by the red-black tree global thread list implementation: -don't return a difference, this can overflow -don't try to substract typed pointers which don't belong to the same object, this gives undefined results This fixes instabilities of programs which use more than a handful of threads, eg spuriously failing pthread_join().
1.106.2.1.4.2	20-May-2011	matt	bring matt-nb5-mips64 up to date with netbsd-5-1-RELEASE (except compat).
1.106.2.1.4.1	21-Apr-2010	matt	sync to netbsd-5
1.125.4.4	26-Sep-2013	riz	Pull up following revision(s) (requested by riastradh in ticket #959): lib/libpthread/pthread.c: revision 1.137 return errno if pthread_create hits the system limit, not just -1 (this is not entirely correct because it can return ENOMEM which is not mentioned in the spec, but there are other places in pthread_create whete ENOMEM is returned -- it at all, this should be fixed everywhere)
1.125.4.3	29-Apr-2013	riz	branches: 1.125.4.3.2; Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.125.4.2	03-Dec-2012	jdc	Apply patch (requested by riastradh in ticket #735) to fix the unchecked assumption that sizeof(struct __pthread_st) <= pagesize, as observed in PR 47271.
1.125.4.1	07-May-2012	riz	branches: 1.125.4.1.4; Pull up following revision(s) (requested by enami in ticket #209): lib/libpthread/pthread.c: revision 1.134 Store allocated lwpctl state in the thread actually forked, which is the only thread lives in the child process. The problem originally reported here: https://bugs.ruby-lang.org/issues/6341
1.125.4.3.2.1	26-Sep-2013	riz	Pull up following revision(s) (requested by riastradh in ticket #959): lib/libpthread/pthread.c: revision 1.137 return errno if pthread_create hits the system limit, not just -1 (this is not entirely correct because it can return ENOMEM which is not mentioned in the spec, but there are other places in pthread_create whete ENOMEM is returned -- it at all, this should be fixed everywhere)
1.125.4.1.4.1	26-Sep-2013	riz	Pull up following revision(s) (requested by riastradh in ticket #959): lib/libpthread/pthread.c: revision 1.137 return errno if pthread_create hits the system limit, not just -1 (this is not entirely correct because it can return ENOMEM which is not mentioned in the spec, but there are other places in pthread_create whete ENOMEM is returned -- it at all, this should be fixed everywhere)
1.125.2.6	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.125.2.5	23-Jan-2013	yamt	sync with head
1.125.2.4	16-Jan-2013	yamt	sync with (a bit old) head
1.125.2.3	30-Oct-2012	yamt	sync with head
1.125.2.2	23-May-2012	yamt	sync with head.
1.125.2.1	17-Apr-2012	yamt	sync with head
1.137.2.4	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.137.2.3	23-Jun-2013	tls	resync from head
1.137.2.2	25-Feb-2013	tls	resync with head
1.137.2.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.144.4.1	24-Nov-2015	martin	Pull up following revision(s) (requested by manu in ticket #829): lib/libpthread_dbg/pthread_dbg.c: revision 1.43 (via patch) lib/libpthread/pthread_int.h: revision 1.91-1.92 (via patch) lib/libc/stdlib/jemalloc.c: revision 1.37-1.38 lib/libpthread/pthread_tsd.c: revision 1.12-1.14 (via patch) include/limits.h: revision 1.34 (via patch) lib/libpthread/pthread.c: revision 1.146-1.147 (via patch) lib/libpthread/pthread_key_create.3: revision 1.7 (via patch) libpthread: Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256. Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly. Thanks rump for not letting us use even mmap during initialization. libc/jemalloc: Fix non _REENTRANT build. Defer using pthread keys until we are threaded. From Christos, fixes PR port-arm/50087 by allowing malloc calls prior to libpthread initialization.
1.147.8.4	09-Dec-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1924): tests/lib/libpthread/Makefile: revision 1.16 lib/libpthread/pthread.c: revision 1.184 distrib/sets/lists/debug/mi: revision 1.424 distrib/sets/lists/tests/mi: revision 1.1297 tests/lib/libpthread/t_stack.c: revision 1.1 tests/lib/libpthread/t_stack.c: revision 1.2 tests/lib/libpthread/t_stack.c: revision 1.3 tests/lib/libpthread/t_stack.c: revision 1.4 tests/lib/libpthread/t_stack.c: revision 1.5 tests/lib/libpthread/t_stack.c: revision 1.6 pthread: Add tests for pthread user stack allocation. PR lib/57721 libpthread/t_stack: Make this more robust to the guard size bug. Make sure to allocate enough space for the thread's stack for a guard even though there shouldn't be one, so that when we run the thread, it doesn't start with the stack pointer pointing into someone else's allocation (like malloc) causing stack frames to trash another data structure -- or causing the user of that data structure to trash the stack frames. PR lib/57721 libpthread/t_stack: Omit needless cast in previous. Arose from an earlier draft of the change. PR lib/57721 libpthread/t_stack: Appease gcc12 maybe-uninitialized warning. The jmp_buf is not, in fact, uninitialized at the point of use, but it doesn't hurt to narrow the scope a bit to between when the jmp_buf is initialized by setjmp, and when the signal handler might be called after sigaction. Noted by prlw1. PR lib/57721 libpthread/t_stack: Fix format string for size_t. Tested this on i386 since that had been crashing before, but i386 doesn't see %zu for unsigned int as a problem. PR lib/57721 pthread: Don't adjust user-allocated stack addresses by guardsize. PR lib/57721
1.147.8.3	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #234): sys/arch/amd64/include/vmparam.h: revision 1.43 sys/kern/exec_subr.c: revision 1.79 lib/libpthread/pthread_int.h: revision 1.94 sys/arch/mips/include/vmparam.h: revision 1.58 sys/arch/mips/include/vmparam.h: revision 1.59 lib/libpthread/TODO: revision 1.19 sys/arch/powerpc/include/vmparam.h: revision 1.20 sys/arch/riscv/include/vmparam.h: revision 1.2 sys/arch/riscv/include/vmparam.h: revision 1.3 sys/arch/i386/include/vmparam.h: revision 1.85 tests/lib/libpthread/t_join.c: revision 1.9 sys/uvm/uvm_meter.c: revision 1.66 sys/uvm/uvm_param.h: revision 1.36 sys/kern/exec_subr.c: revision 1.80 sys/uvm/uvm_param.h: revision 1.37 sys/kern/exec_subr.c: revision 1.81 sys/kern/exec_subr.c: revision 1.82 lib/libpthread/pthread_attr_getguardsize.3: revision 1.4 lib/libpthread/pthread.c: revision 1.148 lib/libpthread/pthread_attr.c: revision 1.17 sys/arch/amd64/include/vmparam.h: revision 1.42 Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Revert for the moment, creates problems on i386. Recommit exec_subr.c revision 1.79: Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Additionally, change VM_DEFAULT_ADDRESS_TOPDOWN to include user_stack_guard_size in the size reservation. Update VM_DEFAULT_ADDRESS32_TOPDOWN to include guard area. Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.147.8.2	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #232): lib/libpthread/pthread.c: revision 1.149 Do not look at environmental variables for suid/guid binaries.
1.147.8.1	29-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #127): tests/libexec/ld.elf_so/h_thread_local_dtor.c: revision 1.1 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv6/c++config.h: revision 1.14 external/gpl3/gcc/lib/libstdc++-v3/arch/earmeb/c++config.h: revision 1.17 lib/libc/stdlib/atexit.h: file removal lib/libc/stdlib/exit.c: revision 1.16 external/gpl3/gcc/lib/libstdc++-v3/arch/powerpc64/c++config.h: revision 1.8 lib/libc/stdlib/exit.c: revision 1.17 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv7hf/c++config.h: revision 1.14 distrib/sets/lists/debug/shl.mi: revision 1.178 external/gpl3/gcc/lib/libstdc++-v3/arch/sh3el/c++config.h: revision 1.21 distrib/sets/lists/debug/shl.mi: revision 1.179 distrib/sets/lists/debug/mi: revision 1.219 lib/libpthread/pthread.c: revision 1.150 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv7/c++config.h: revision 1.14 libexec/ld.elf_so/symbols.map: revision 1.2 include/dlfcn.h: revision 1.25 external/gpl3/gcc/lib/libstdc++-v3/arch/arm/c++config.h: revision 1.21 external/gpl3/gcc/lib/libstdc++-v3/arch/x86_64/c++config.h: revision 1.23 external/gpl3/gcc/lib/libstdc++-v3/arch/mips64el/c++config.h: revision 1.18 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv4eb/c++config.h: revision 1.14 external/gpl3/gcc/lib/libstdc++-v3/arch/earm/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/mipsel/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/ia64/c++config.h: revision 1.5 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv6eb/c++config.h: revision 1.14 external/gpl3/gcc/lib/libstdc++-v3/arch/earmhf/c++config.h: revision 1.17 distrib/sets/lists/tests/mi: revision 1.755 external/gpl3/gcc/lib/libstdc++-v3/arch/mips64eb/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/i386/c++config.h: revision 1.20 external/gpl3/gcc/lib/libstdc++-v3/arch/vax/c++config.h: revision 1.21 external/gpl3/gcc/lib/libstdc++-v3/arch/armeb/c++config.h: revision 1.21 external/gpl3/gcc/lib/libstdc++-v3/arch/sparc/c++config.h: revision 1.20 lib/libc/dlfcn/dlfcn_elf.c: revision 1.14 tests/libexec/ld.elf_so/t_thread_local_dtor.sh: revision 1.1 tests/lib/libpthread/t_thread_local_dtor.sh: revision 1.1 lib/libc/stdlib/Makefile.inc: revision 1.93 lib/libc/include/atexit.h: revision 1.1 lib/libc/include/atexit.h: revision 1.2 external/gpl3/gcc/lib/libstdc++-v3/arch/m68k/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv6hf/c++config.h: revision 1.14 distrib/sets/lists/debug/shl.mi: revision 1.180 external/gpl3/gcc/lib/libstdc++-v3/arch/sparc64/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv6hfeb/c++config.h: revision 1.14 external/gpl3/gcc/lib/libstdc++-v3/arch/hppa/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv7hfeb/c++config.h: revision 1.14 lib/libc/stdlib/cxa_thread_atexit.c: revision 1.1 tests/libexec/ld.elf_so/helper_dso3/h_helper_dso3.cpp: revision 1.1 tests/libexec/ld.elf_so/helper_dso3/Makefile: revision 1.1 external/gpl3/gcc/lib/libstdc++-v3/arch/riscv64/c++config.h: revision 1.5 libexec/ld.elf_so/rtld.c: revision 1.185 external/gpl3/gcc/lib/libstdc++-v3/arch/sh3eb/c++config.h: revision 1.19 external/gpl3/gcc/lib/libstdc++-v3/arch/riscv32/c++config.h: revision 1.5 external/gpl3/gcc/lib/libstdc++-v3/arch/m68000/c++config.h: revision 1.15 external/gpl3/gcc/lib/libstdc++-v3/arch/mipseb/c++config.h: revision 1.21 external/gpl3/gcc/lib/libstdc++-v3/arch/coldfire/c++config.h: revision 1.12 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv4/c++config.h: revision 1.14 external/gpl3/gcc/lib/libstdc++-v3/arch/earmhfeb/c++config.h: revision 1.15 external/gpl3/gcc/lib/libstdc++-v3/arch/alpha/c++config.h: revision 1.19 tests/libexec/ld.elf_so/Makefile: revision 1.9 external/gpl3/gcc/lib/libstdc++-v3/arch/powerpc/c++config.h: revision 1.20 external/gpl3/gcc/lib/libstdc++-v3/arch/earmv7eb/c++config.h: revision 1.14 tests/lib/libpthread/h_thread_local_dtor.cpp: revision 1.1 distrib/sets/lists/tests/shl.mi: revision 1.11 tests/lib/libpthread/Makefile: revision 1.13 libexec/ld.elf_so/rtld.h: revision 1.129 external/gpl3/gcc/lib/libstdc++-v3/arch/or1k/c++config.h: revision 1.6 Implement __cxa_thread_atexit and __cxa_thread_atexit_impl. This functions are used for destructors of thread_local objects. If a pending destructor exists, prevent unloading of shared objects. Introduce __dl_cxa_refcount interface for this purpose. When the last reference is gone and the object has been dlclose'd before, the unloading is finalized. Ideally, __cxa_thread_atexit_impl wouldn't exist, but libstdc++ insists on providing __cxa_thread_atexit as direct wrapper without further patching. Fix filename of new debug file Add misising DEBUGLIB file Avoid common declaration. Drop TLS variant checks, emutls is enough for VAX and Sun2.
1.151.4.3	21-Apr-2020	martin	Sync with HEAD
1.151.4.2	08-Apr-2020	martin	Merge changes from current as of 20200406
1.151.4.1	10-Jun-2019	christos	Sync with HEAD
1.151.2.1	06-Sep-2018	pgoyette	Sync with HEAD Resolve a couple of conflicts (result of the uimin/uimax changes)
1.153.2.3	09-Dec-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1775): tests/lib/libpthread/Makefile: revision 1.16 lib/libpthread/pthread.c: revision 1.184 distrib/sets/lists/debug/mi: revision 1.424 distrib/sets/lists/tests/mi: revision 1.1297 tests/lib/libpthread/t_stack.c: revision 1.1 tests/lib/libpthread/t_stack.c: revision 1.2 tests/lib/libpthread/t_stack.c: revision 1.3 tests/lib/libpthread/t_stack.c: revision 1.4 tests/lib/libpthread/t_stack.c: revision 1.5 tests/lib/libpthread/t_stack.c: revision 1.6 pthread: Add tests for pthread user stack allocation. PR lib/57721 libpthread/t_stack: Make this more robust to the guard size bug. Make sure to allocate enough space for the thread's stack for a guard even though there shouldn't be one, so that when we run the thread, it doesn't start with the stack pointer pointing into someone else's allocation (like malloc) causing stack frames to trash another data structure -- or causing the user of that data structure to trash the stack frames. PR lib/57721 libpthread/t_stack: Omit needless cast in previous. Arose from an earlier draft of the change. PR lib/57721 libpthread/t_stack: Appease gcc12 maybe-uninitialized warning. The jmp_buf is not, in fact, uninitialized at the point of use, but it doesn't hurt to narrow the scope a bit to between when the jmp_buf is initialized by setjmp, and when the signal handler might be called after sigaction. Noted by prlw1. PR lib/57721 libpthread/t_stack: Fix format string for size_t. Tested this on i386 since that had been crashing before, but i386 doesn't see %zu for unsigned int as a problem. PR lib/57721 pthread: Don't adjust user-allocated stack addresses by guardsize. PR lib/57721
1.153.2.2	08-Aug-2022	martin	Apply patch, requested by riastradh in ticket #1498: lib/libpthread/pthread.c 1.181 (via patch) libpthread(3): Fix a marvellous interaction with rtld. Patch from chs@. Comment explaining the story by me. This patch may not be optimal -- maybe it would be better in pthread__init, or better for rtld to call _lwp_unpark after _lwp_park in the contened case -- but we've tested this version and it's annoying to reproduce, so let's take this version and worry about testing improvements later.
1.153.2.1	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.181.2.3	20-Jul-2024	martin	Pull up following revision(s) (requested by rin in ticket #757): lib/libpthread/pthread.c: revision 1.182 Use snprintf_ss in pthread__assertfunc and update comment in pthread__errorfunc. snprintf can use locks in some code paths and we only care about the restricted subset here.
1.181.2.2	20-Jun-2024	martin	Pull up following revision(s) (requested by hannken in ticket #711): lib/libpthread/pthread.c: revision 1.185 Fix resource leak in pthread_create(). Pthread field "pt_lwpctl" must not be accessed after _lwp_exit() as the kernel may free it, attach it to another thread and change its "lc_curcpu". The "pthread__deadqueue" will fill up with pthreads with an invalid "pt_lwpctl" and allocated stack that never get reused. Replace the test "lc_curcpu == LWPCTL_CPU_EXITED" with test "_lwp_kill(newthread->pt_lid, 0) == -1 && errno == ESRCH" to make sure this thread has finished its _lwp_exit(). PR lib/57831 "Memory leaks in libpthread/libc"
1.181.2.1	28-Nov-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #478): tests/lib/libpthread/Makefile: revision 1.16 lib/libpthread/pthread.c: revision 1.184 distrib/sets/lists/debug/mi: revision 1.424 distrib/sets/lists/tests/mi: revision 1.1297 tests/lib/libpthread/t_stack.c: revision 1.1 tests/lib/libpthread/t_stack.c: revision 1.2 tests/lib/libpthread/t_stack.c: revision 1.3 tests/lib/libpthread/t_stack.c: revision 1.4 tests/lib/libpthread/t_stack.c: revision 1.5 tests/lib/libpthread/t_stack.c: revision 1.6 pthread: Add tests for pthread user stack allocation. PR lib/57721 libpthread/t_stack: Make this more robust to the guard size bug. Make sure to allocate enough space for the thread's stack for a guard even though there shouldn't be one, so that when we run the thread, it doesn't start with the stack pointer pointing into someone else's allocation (like malloc) causing stack frames to trash another data structure -- or causing the user of that data structure to trash the stack frames. PR lib/57721 libpthread/t_stack: Omit needless cast in previous. Arose from an earlier draft of the change. PR lib/57721 libpthread/t_stack: Appease gcc12 maybe-uninitialized warning. The jmp_buf is not, in fact, uninitialized at the point of use, but it doesn't hurt to narrow the scope a bit to between when the jmp_buf is initialized by setjmp, and when the signal handler might be called after sigaction. Noted by prlw1. PR lib/57721 libpthread/t_stack: Fix format string for size_t. Tested this on i386 since that had been crashing before, but i386 doesn't see %zu for unsigned int as a problem. PR lib/57721 pthread: Don't adjust user-allocated stack addresses by guardsize. PR lib/57721
1.185.2.1	02-Aug-2025	perseant	Sync with HEAD
1.2	22-Nov-2024	riastradh	libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.1	21-Nov-2024	riastradh	libpthread: Add expected symbols list. PR lib/58838: shared libraries in base should all have expsym lists
1.42	06-Oct-2025	riastradh	libc: Expose some more pthread stubs. Additionally, provide the option for pthread.h to expose pthread_create so that libc can provide a weak stub for it, if you define _NETBSD_PTHREAD_CREATE_WEAK. This allows libraries to use the functions without linking against libpthread for applications that don't need threads. For example, with OpenSSL's libcrypto, as long as you don't try to raise OSSL_set_max_threads above 0, it won't ever try pthread_create. New pthread.h macros defined: pthread_attr_destroy __libc_thr_attr_destroy pthread_attr_init __libc_thr_attr_init pthread_attr_setdetachstate __libc_thr_attr_setdetachstate pthread_detach __libc_thr_detach pthread_join __libc_thr_join New pthread.h macros defined if _NETBSD_PTHREAD_CREATE_WEAK is defined first: pthread_create __libc_thr_create New symbols defined by libc as weak aliases for stubs that always fail but can be overridden by libpthread: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that libc already defined __libc_thr_create. New internal stubs, not for overriding: __libc_thr_detach_stub __libc_thr_join_stub These were formerly called __libc_pthread_detach and __libc_pthread_join, respectively, and libc has defined weak aliases pthread_detach and pthread_join for them since 2013. I retained all four of those symbols, but defined new ones in the __ namespace that match the pattern for other thread stubs to avoid raising questions about why the pattern seems to be broken. I left a comment noting this fact too. New pthread strong aliases to override the libc symbols: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that pthread already defined a strong __libc_thr_create alias for the real pthread_create, so there is no need to add a new one. PR lib/59685: libcrypto should not depend on libpthread
1.41	20-Feb-2018	kamil	Remove namespace restriction from pthread_condattr_{g,s}etclock(3) These functions were marked as _NETBSD_SOURCE when introduced to the sources. In fact they are regular POSIX threading functions available since the 2001 standard. There is an older mention about alignment with "IEEE Std 1003.1j-2000". This corrects usage of these functions when a source code is compiled with a POSIX namespace option.
1.40	06-Feb-2018	christos	fix duplicate declaration of pthread_atfork in unistd.h
1.39	26-Dec-2017	christos	Needs to be protected since it has a timespec argument. Found by lint(1)
1.38	30-Oct-2016	kamil	branches: 1.38.6; POSIX harder the pthread_mutex_timedlock(3) prototype Add missing __restrict keyword to the first pointer parameter. It was already used for the second argument, should not be a functional change and generated code should be the same. This new form is now aligned with POSIX.
1.37	03-Jul-2016	christos	branches: 1.37.2; GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.36	23-Apr-2016	christos	Add pthread_getcpuclockid(3)
1.35	03-Nov-2012	christos	add pthread_condattr_setclock(3)
1.34	06-Aug-2010	christos	branches: 1.34.6; 1.34.8; 1.34.12; Add pthread_getattr_np()
1.33	11-Jan-2009	christos	merge christos-time_t
1.32	18-Jul-2008	pooka	branches: 1.32.6; add pthread_cond_has_waiters_np()
1.31	05-Jun-2008	ad	Back out previous because it breaks the build.
1.30	05-Jun-2008	ad	glibc compatibile PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP, requested by rafal@.
1.29	28-Apr-2008	martin	branches: 1.29.2; Remove clause 3 and 4 from TNF licenses
1.28	26-Jan-2008	rmind	branches: 1.28.4; sched_setparam: fix the case when incorrect (according to the class) in-kernel priority is used. Reported by <drochner>. Minor fixes for scheduling calls to conform the POSIX: - If pid is equal to zero, use the calling process; - In case of permission problem, return EPERM instead of EACESS; - sched_setscheduler() should return previously used policy; - pthread_* calls should return the error code or zero; Should fix the namespace problems (and builds of some packages): - Move cpuset_t defintion from pset.h to sched.h; - Remove the #include of pset.h in pthread.h;
1.27	19-Jan-2008	christos	s/set/test/
1.26	19-Jan-2008	christos	only include <sys/pset.h> if _NETBSD_SOURCE
1.25	15-Jan-2008	rmind	Implementation of processor-sets, affinity and POSIX real-time extensions. Add schedctl(8) - a program to control scheduling of processes and threads. Notes: - This is supported only by SCHED_M2; - Migration of LWP mechanism will be revisited; Proposed on: <tech-kern>. Reviewed by: <ad>.
1.24	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.23	27-Nov-2007	ad	Add thr_curcpu(), pthread_curcpu_np().
1.22	14-Nov-2007	drochner	Add pthread_equal() to libc stubs; this makes a lot of sense for threadsafe libraries implementing own locking functions. Ride on yesterday's minor version bumps.
1.21	21-Mar-2005	kleink	branches: 1.21.12; Add restrict qualifiers to <pthread.h> function arguments.
1.20	29-Dec-2004	nathanw	branches: 1.20.2; Implement pthread_attr_{set,get}schedpolicy() at the same level as the other scheduling stuff: only handle SCHED_OTHER. Like the rest of the scheduling stuff, this is for the benefit of code that can't be bothered to test against _POSIX_THREAD_PRIORITY_SCHEDULING.
1.19	15-Dec-2004	wiz	Fix typo in comment.
1.18	13-Dec-2004	nathanw	Add #defines to make use of libc stubs for pthread_cond_wait() and pthread_cond_timedwait(). XXX as noted in the comments, in the situations where these are useful, they should never be called in a single-threaded process. Perhaps they should die rather than return 0. Addresses xsrc/28630.
1.17	10-Dec-2004	nathanw	Use CPP macros to cause many libpthread functions used by applications to be transformed into the do-nothing-when-libpthread-isn't-linked libc stub names. This will permit library code that uses <pthread.h> and pthread functions "defensively" to not need to link against libpthread and not need to be patched to the threadlib.h API.
1.16	07-Dec-2003	christos	Add pthread_{g,s}etschedparam, that do nothing.
1.15	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.14	18-Jul-2003	nathanw	Add prototypes and necessary symbols for a bunch of pthread_attr_*() functions, including (interface borrowed from FreeBSD) pthread_attr_get_np(). Remove a few limit-indicating symbols that don't actually need to be defined (and if they did need to be defined, it would be in limits.h, not here).
1.13	18-Jul-2003	lukem	#include <pthread_types.h> instead of "pthread_types.h"
1.12	17-Jul-2003	nathanw	Define PTHREAD_* structure initializers from _PTHREAD_* macros from pthread_types.h.
1.11	16-Jul-2003	nathanw	pthread_kill() prototype moved to <signal.h>.
1.10	02-Jun-2003	christos	Add pthread_attr_getstack{,size,addr} needed by jdk
1.9	26-Feb-2003	thorpej	Add support for naming a thread, using an API compatible with Tru64 Unix: * pthread_attr_getname_np() * pthread_attr_setname_np() * pthread_getname_np() * pthread_setname_np() In addition to being query'able by the application (for log messages, etc.), it is intended that these names can show up in the debugger. Reviewed by nathanw.
1.8	13-Feb-2003	nathanw	Implement pthread_atfork() (in libc, because the required threadlib stub behavior is exactly the same as the usual behavior).
1.7	19-Jan-2003	thorpej	Remove the dummy stack attr routines -- best to catch broken applications and fix them to use the proper feature test instead (as has already been done with the openldap package).
1.6	19-Jan-2003	skrll	Move _POSIX_THREADS to the right place and define a few other symbolic constants for the features we gained with the merge of the nathanw_sa branch. Ok'd by thorpej. Closes my PR 19930.
1.5	19-Jan-2003	wiz	Remove another variable name.
1.4	19-Jan-2003	christos	- constify the get functions - remove argument variable names since they pollute the namespace - add mock implementation of the missing stack functions XXX: we need to do this right [i.e. actually get and set sizes and addresses] but the current stack setup makes this a bit complicated.
1.3	19-Jan-2003	jdolecek	'destructor' is a bit too generic; use 'destruct' instead for pthread_key_create() prototype this fixes compilation of Python 2.2 with thread support XXX perhaps should drop all variable names from prototypes?
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread.h was initially added on branch nathanw_sa.
1.1.2.21	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.20	13-Jan-2003	thorpej	Implement recursive and errorcheck mutexes.
1.1.2.19	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.18	07-Jan-2003	thorpej	Implement the pthread_barrier API.
1.1.2.17	03-Nov-2002	skrll	Whitespace in comments
1.1.2.16	01-Nov-2002	thorpej	* Default to a 100mS round-robin timer; there are a great many applications that assume concurrency even on a uniprocessor. (These applications are, of course, broken, but there's not much we can do about it.) * Add pthread_getrrtimer_np() and pthread_setrrtimer_np() functions which provide access to the round-robin timer to application programs. Setting the rrtimer to 0 will disable timeslicing. Per discussion with Loren Rittle (on libstdc++@gcc.gnu.org) and Nathan Williams (privately). The 100mS default interval is chosen because timeslicing is largely for user-visible parallelism, and the 100mS interval results in less overhead while still providing a reasonable amount of user-visible parallelism.
1.1.2.15	28-Oct-2002	nathanw	Implement POSIX read-write locks.
1.1.2.14	27-Oct-2002	thorpej	Remove duplicate <sched.h>
1.1.2.13	27-Oct-2002	thorpej	Cosmetic changes.
1.1.2.12	24-Jun-2002	nathanw	C++ protection. From Nick Hudson.
1.1.2.11	02-May-2002	nathanw	Different way of integrating with libc: Create a vector type for pthread operations; libc will have a pointer to such a vector. When the pthread library is loaded, set libc's pointer to a vector of real operations. This removes the reliance on weak symbol magic, which didn't work for static binaries, and as an aesthetic side effect, we don't have to export a bunch of ugly _libc_pthread_* wrappers.
1.1.2.10	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.9	01-Mar-2002	nathanw	Declare POSIX spinlock interfaces: pthread_spin_*() and pthread_spinlock_t. Move the internal spinlock interface declarations back to the internal header.
1.1.2.8	28-Jan-2002	nathanw	Cancellation support. This includes implementing pthread_cancel() and pthread_testcancel(), making pthread_join() and pthread_cond_wait() cancellation points, introducing new states to distinguish waiting on a sleep queue from waiting in the kernel, and introducing a locking protocol around changing a thread's run state.
1.1.2.7	30-Dec-2001	nathanw	Declare cancellation routines and define cancellation constants. Define pthread_cleanup_push() and pthread_cleanup_pop(). Rename pt_spin_t to pthread_spin_t. Add pthread__errno() interface, for use by libc.
1.1.2.6	08-Aug-2001	nathanw	Add the __noreturn__ attribute to pthread_exit(). Add pthread_once and thread-specific data functions. Expose pthread spinlock functions.
1.1.2.5	06-Aug-2001	nathanw	broadacst->broadcast (Regression tests can also catch spelling errors!)
1.1.2.4	25-Jul-2001	nathanw	Remove obsolete PTHREAD_COND_INITIALIZER definition. Add pthread_mutexattr_{init,destroy}(). Remove optional pthread_condattr functions.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Move some of the more internal types to another file, to improve readability. C sucks, or I'd take them out of the application visibility completely.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.20.2.1	22-Mar-2005	tron	Pull up revision 1.21 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.21.12.2	23-Mar-2008	matt	sync with HEAD
1.21.12.1	09-Jan-2008	matt	sync with HEAD
1.28.4.1	18-May-2008	yamt	sync with head.
1.29.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.32.6.2	05-Jan-2009	christos	protect functions that use timespec, but don't bother defining compat versions since we are going to bump. Fixes lint issues in libc.
1.32.6.1	18-Jul-2008	christos	file pthread.h was added on branch christos-time_t on 2009-01-05 01:28:26 +0000
1.34.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.34.8.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #722): lib/libpthread/pthread_cond.c: revision 1.58 lib/libpthread/pthread_condattr.3: revision 1.8 lib/libpthread/pthread.h: revision 1.35 add pthread_condattr_setclock(3)
1.34.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.37.2.1	04-Nov-2016	pgoyette	Sync with HEAD
1.38.6.1	25-Feb-2018	snj	Pull up following revision(s) (requested by kamil in ticket #562): lib/libpthread/pthread.h: 1.41 Remove namespace restriction from pthread_condattr_{g,s}etclock(3) These functions were marked as _NETBSD_SOURCE when introduced to the sources. In fact they are regular POSIX threading functions available since the 2001 standard. There is an older mention about alignment with "IEEE Std 1003.1j-2000". This corrects usage of these functions when a source code is compiled with a POSIX namespace option.
1.15	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.14	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.13	19-Mar-2006	christos	Coverity CID 882: Avoid NULL deref.
1.12	06-Jan-2005	mycroft	gettimeofday();TIMEVAL_TO_TIMESPEC(); is exactly equivalent to clock_gettime(CLOCK_REALTIME), except the latter may have more preicison some day. So, use that.
1.11	29-Dec-2004	nathanw	Avoid passing zero-valued timespecs to timer_settime() when we want to set a timer, as that will clear the timer instead. Pass in a safely in-the-past value instead. Addresses PR lib/28700. (XXX passing in values between 0 and 1000 nanoseconds will still fail, but that bug needs to be fixed in timer_settime(), not here)
1.10	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.9	14-Mar-2004	cl	branches: 1.9.4; add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.8	07-Apr-2003	nathanw	Consistently use pthread__assert() rather than err() to assert that timer_settime() worked, and don't bother calling err() after a pthread__assert() call.
1.7	11-Mar-2003	nathanw	Remove debugging code accidentally committed.
1.6	11-Mar-2003	nathanw	* Use a <= comparison rather than a < comparison when searching for alarms to process. * Remove a redundant assignment. * Make a debug message more consistent with the others.
1.5	08-Mar-2003	lukem	add __RCSID()
1.4	15-Feb-2003	nathanw	Adapt to pthread__assert() and remove local debug toggle.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Jan-2002	nathanw	branches: 1.1.2; file pthread_alarms.c was initially added on branch nathanw_sa.
1.1.2.8	11-Jan-2003	skrll	Improve error checking. OK'd by Nathan.
1.1.2.7	16-Dec-2002	nathanw	Adjust the locking protocol for alarms to prevent deletion of running alarms.
1.1.2.6	22-Oct-2002	nathanw	In pthread__alarm_process(), initialize "next" to the same value as "iterator", so that the timer always gets reset, even if the current time is before the first timer on the list. XXX the situation that this avoids shouldn't happen and should be looked into XXX more closely.
1.1.2.5	16-Jul-2002	nathanw	Make the caller of the alarm functions supply the alarm data structure, instead of malloc'ing() it. "malloc() inside spinlocks considered harmful." Duh.
1.1.2.4	20-May-2002	nathanw	Add a bunch of debug logging and assertions. In pthread__alarm_process(), reset the timer to the next alarm in the queue.
1.1.2.3	19-Feb-2002	nathanw	Move alarm initialization into pthread_alarms.c.
1.1.2.2	30-Jan-2002	nathanw	Initialize the temporary queue.
1.1.2.1	28-Jan-2002	nathanw	Add an alarm-queue and callback system. Currently useful for pthread_cond_timedwait(); will also be useful for pthread_mutex_timedlock().
1.9.4.1	08-Apr-2005	tron	Pull up revision 1.11 (requested by nathanw in ticket #1064): Avoid passing zero-valued timespecs to timer_settime() when we want to set a timer, as that will clear the timer instead. Pass in a safely in-the-past value instead. Addresses PR lib/28700. (XXX passing in values between 0 and 1000 nanoseconds will still fail, but that bug needs to be fixed in timer_settime(), not here)
1.22	10-Nov-2012	uwe	Each get function "has" a set counterpart, it doesn't "contain" it.
1.21	09-Jul-2010	jruoho	branches: 1.21.6; 1.21.12; Update conformance to the 2001 revision.
1.20	08-Jul-2010	wiz	Add missing word.
1.19	08-Jul-2010	jruoho	Rewrite and include a short summary.
1.18	07-Jul-2010	jruoho	Finally, split pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() to their own page.
1.17	07-Jul-2010	jruoho	Split pthread_attr_getschedparam() and pthread_attr_setschedparam() to a separate page.
1.16	07-Jul-2010	jruoho	Split pthread_attr_getinheritsched() and pthread_attr_setinheritsched() to a separate page, and actually document these.
1.15	07-Jul-2010	jruoho	Move pthread_attr_getguardsize() and pthread_attr_setguardsize() to a separate page, and actually document these.
1.14	07-Jul-2010	jruoho	Move the thread stack attribute functions to a separate page. In addition, document pthread_attr_getstack() and pthread_attr_setstack(). Try to also document these a little better (in particular, note some items in the long list of caveats and questions related to application-controlled thread stack).
1.13	07-Jul-2010	jruoho	Split pthread_attr_getdetachstate(3) and pthread_attr_setdetachstate(3) to a separate page. Once ready, the main page, pthread_attr(3), will contain a summary of the various thread attribute functions.
1.12	07-Jul-2010	jruoho	Remove pthread_attr_getscope() and pthread_attr_setscope().
1.11	05-Oct-2009	rmind	pthread_attr(3): sync with reality i.e. uncomment descriptions about various functions we support. Fix license style.
1.10	11-Apr-2009	wiz	Avoid duplicate .Pp.
1.9	11-Apr-2009	joerg	.\" are comments, not ./"
1.8	19-Oct-2008	snj	branches: 1.8.4; 1.8.6; s/explicitely/explicitly/
1.7	04-May-2008	martin	Move TNF licenses to 2 clause form
1.6	01-Dec-2007	wiz	branches: 1.6.6; Use more markup. New sentence, new line.
1.5	21-Mar-2007	ad	branches: 1.5.6; PR lib/34931: PTHREAD_ATTR(3) doesn't document PTHREAD_CREATE_JOINABLE and PTHREAD_CREATE_DETACHED macros. From Matthew Mondor.
1.4	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.3	26-Jun-2003	wiz	branches: 1.3.6; Remove trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.6.1	22-Mar-2005	tron	Pull up revision 1.4 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.5.6.1	09-Jan-2008	matt	sync with HEAD
1.6.6.1	18-May-2008	yamt	sync with head.
1.8.6.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.8.4.2	19-Oct-2008	snj	s/explicitely/explicitly/
1.8.4.1	19-Oct-2008	snj	file pthread_attr.3 was added on branch christos-time_t on 2008-10-19 21:27:47 +0000
1.21.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.21.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.22	06-Oct-2025	riastradh	libc: Expose some more pthread stubs. Additionally, provide the option for pthread.h to expose pthread_create so that libc can provide a weak stub for it, if you define _NETBSD_PTHREAD_CREATE_WEAK. This allows libraries to use the functions without linking against libpthread for applications that don't need threads. For example, with OpenSSL's libcrypto, as long as you don't try to raise OSSL_set_max_threads above 0, it won't ever try pthread_create. New pthread.h macros defined: pthread_attr_destroy __libc_thr_attr_destroy pthread_attr_init __libc_thr_attr_init pthread_attr_setdetachstate __libc_thr_attr_setdetachstate pthread_detach __libc_thr_detach pthread_join __libc_thr_join New pthread.h macros defined if _NETBSD_PTHREAD_CREATE_WEAK is defined first: pthread_create __libc_thr_create New symbols defined by libc as weak aliases for stubs that always fail but can be overridden by libpthread: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that libc already defined __libc_thr_create. New internal stubs, not for overriding: __libc_thr_detach_stub __libc_thr_join_stub These were formerly called __libc_pthread_detach and __libc_pthread_join, respectively, and libc has defined weak aliases pthread_detach and pthread_join for them since 2013. I retained all four of those symbols, but defined new ones in the __ namespace that match the pattern for other thread stubs to avoid raising questions about why the pattern seems to be broken. I left a comment noting this fact too. New pthread strong aliases to override the libc symbols: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that pthread already defined a strong __libc_thr_create alias for the real pthread_create, so there is no need to add a new one. PR lib/59685: libcrypto should not depend on libpthread
1.21	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.20	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.19	29-Jan-2020	kamil	Use the pta_magic field in pthread attribute Set PT_ATTR_DEAD on pthread_attr_destroy(). Check pta_magic before using pthread_attr_t in a bunch of other functions.
1.18	01-Aug-2017	martin	branches: 1.18.4; pthread__attr_init_private: malloc+memset -> calloc. Also initialize all values to the proper defaults. This fixes the "rustc panic" discussed on pkgsrc-users. OK: joerg
1.17	02-Jul-2017	joerg	Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.16	02-Mar-2012	joerg	branches: 1.16.24; Separate pthread_t from thread stack. Drop additional alignment restrictions on the thread stack. Remove remaining parts of stackid.
1.15	06-Aug-2010	christos	branches: 1.15.6; move namespace protection before inclusion.
1.14	06-Aug-2010	christos	Add a weak alias for pthread_attr_get_np. Noted my Matthias Drochner.
1.13	06-Aug-2010	christos	Add pthread_getattr_np()
1.12	18-Jan-2009	lukem	fix -Wsign-compare issues
1.11	10-Oct-2008	ad	branches: 1.11.4; pthread_attr_getschedparam: allow without preceding setparam on the attr structure.
1.10	28-Jun-2008	ad	Now that we have all the scheduling gunk, make these do something useful: pthread_attr_get_np pthread_attr_setschedparam pthread_attr_getschedparam pthread_attr_setschedpolicy pthread_attr_getschedpolicy
1.9	25-Jun-2008	ad	pthread_attr_setstacksize: EINVAL if the requested size is less than sysconf(_SC_THREAD_STACK_MIN).
1.8	28-Apr-2008	martin	branches: 1.8.2; Remove clause 3 and 4 from TNF licenses
1.7	08-Jan-2008	christos	branches: 1.7.4; add missing static decls.
1.6	16-Aug-2007	ad	branches: 1.6.2; Remove PT_FIXEDSTACKSIZE_LG.
1.5	21-Sep-2005	tv	branches: 1.5.8; pthread_attr_getschedpolicy() wasn't setting the return buffer at all. SCHED_OTHER happens to be 0, so this assignment to "int *" succeeds, and becomes a no-op. Fix by dereferencing "policy" to do the assignment, thus filling the return buffer with 0.
1.4	29-Dec-2004	nathanw	branches: 1.4.2; Implement pthread_attr_{set,get}schedpolicy() at the same level as the other scheduling stuff: only handle SCHED_OTHER. Like the rest of the scheduling stuff, this is for the benefit of code that can't be bothered to test against _POSIX_THREAD_PRIORITY_SCHEDULING.
1.3	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.2	11-Sep-2003	christos	sprinkle ARGSUSED for good cheer.
1.1	18-Jul-2003	nathanw	pthread.c was getting a bit unwieldly. Move pthread_attr stuff out into a new file, and put the shared private structure definition in pthread_int.h.
1.4.2.1	27-Sep-2005	tron	Pull up following revision(s) (requested by tv in ticket #818): lib/libpthread/pthread_attr.c: revision 1.5 pthread_attr_getschedpolicy() wasn't setting the return buffer at all. SCHED_OTHER happens to be 0, so this assignment to "int *" succeeds, and becomes a no-op. Fix by dereferencing "policy" to do the assignment, thus filling the return buffer with 0.
1.5.8.1	03-Sep-2007	skrll	Sync with HEAD.
1.6.2.1	23-Mar-2008	matt	sync with HEAD
1.7.4.1	18-May-2008	yamt	sync with head.
1.8.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.11.4.2	10-Oct-2008	ad	pthread_attr_getschedparam: allow without preceding setparam on the attr structure.
1.11.4.1	10-Oct-2008	ad	file pthread_attr.c was added on branch christos-time_t on 2008-10-10 09:13:21 +0000
1.15.6.1	17-Apr-2012	yamt	sync with head
1.16.24.2	01-Oct-2017	snj	Pull up following revision(s) (requested by martin in ticket #295): lib/libpthread/pthread_attr.c: revision 1.18 pthread__attr_init_private: malloc+memset -> calloc. Also initialize all values to the proper defaults. This fixes the "rustc panic" discussed on pkgsrc-users. OK: joerg
1.16.24.1	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #234): sys/arch/amd64/include/vmparam.h: revision 1.43 sys/kern/exec_subr.c: revision 1.79 lib/libpthread/pthread_int.h: revision 1.94 sys/arch/mips/include/vmparam.h: revision 1.58 sys/arch/mips/include/vmparam.h: revision 1.59 lib/libpthread/TODO: revision 1.19 sys/arch/powerpc/include/vmparam.h: revision 1.20 sys/arch/riscv/include/vmparam.h: revision 1.2 sys/arch/riscv/include/vmparam.h: revision 1.3 sys/arch/i386/include/vmparam.h: revision 1.85 tests/lib/libpthread/t_join.c: revision 1.9 sys/uvm/uvm_meter.c: revision 1.66 sys/uvm/uvm_param.h: revision 1.36 sys/kern/exec_subr.c: revision 1.80 sys/uvm/uvm_param.h: revision 1.37 sys/kern/exec_subr.c: revision 1.81 sys/kern/exec_subr.c: revision 1.82 lib/libpthread/pthread_attr_getguardsize.3: revision 1.4 lib/libpthread/pthread.c: revision 1.148 lib/libpthread/pthread_attr.c: revision 1.17 sys/arch/amd64/include/vmparam.h: revision 1.42 Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Revert for the moment, creates problems on i386. Recommit exec_subr.c revision 1.79: Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Additionally, change VM_DEFAULT_ADDRESS_TOPDOWN to include user_stack_guard_size in the size reservation. Update VM_DEFAULT_ADDRESS32_TOPDOWN to include guard area. Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.18.4.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.5	22-Oct-2017	abhinav	Add pthread_getattr_np to the NAME section
1.4	06-Aug-2010	christos	document pthread_getattr_np
1.3	07-Jul-2010	wiz	Sort sections.
1.2	06-Jul-2010	njoly	Add missing list end.
1.1	06-Jul-2010	jruoho	Document pthread_attr_get_np(). Fixes PR lib/39289 from ahoka@.
1.4	23-Oct-2017	wiz	Remove superfluous Tn.
1.3	22-Oct-2017	abhinav	Add pthread_attr_setdetachstate to NAME section
1.2	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.1	07-Jul-2010	jruoho	Split pthread_attr_getdetachstate(3) and pthread_attr_setdetachstate(3) to a separate page. Once ready, the main page, pthread_attr(3), will contain a summary of the various thread attribute functions.
1.6	07-Dec-2023	riastradh	pthread: Document the setstack vs setguardsize bug. Suggest the safe, compatible workaround.
1.5	22-Oct-2017	abhinav	branches: 1.5.14; Add missing function names in the NAME section for rest of the man pages in libpthread
1.4	02-Jul-2017	joerg	Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.3	07-Apr-2016	dholland	branches: 1.3.8; _SC_PAGESIZE is not the page size; it's a symbolic code for retrieving the page size.
1.2	08-Jul-2010	wiz	Whitespace nit.
1.1	07-Jul-2010	jruoho	Move pthread_attr_getguardsize() and pthread_attr_setguardsize() to a separate page, and actually document these.
1.3.8.1	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #234): sys/arch/amd64/include/vmparam.h: revision 1.43 sys/kern/exec_subr.c: revision 1.79 lib/libpthread/pthread_int.h: revision 1.94 sys/arch/mips/include/vmparam.h: revision 1.58 sys/arch/mips/include/vmparam.h: revision 1.59 lib/libpthread/TODO: revision 1.19 sys/arch/powerpc/include/vmparam.h: revision 1.20 sys/arch/riscv/include/vmparam.h: revision 1.2 sys/arch/riscv/include/vmparam.h: revision 1.3 sys/arch/i386/include/vmparam.h: revision 1.85 tests/lib/libpthread/t_join.c: revision 1.9 sys/uvm/uvm_meter.c: revision 1.66 sys/uvm/uvm_param.h: revision 1.36 sys/kern/exec_subr.c: revision 1.80 sys/uvm/uvm_param.h: revision 1.37 sys/kern/exec_subr.c: revision 1.81 sys/kern/exec_subr.c: revision 1.82 lib/libpthread/pthread_attr_getguardsize.3: revision 1.4 lib/libpthread/pthread.c: revision 1.148 lib/libpthread/pthread_attr.c: revision 1.17 sys/arch/amd64/include/vmparam.h: revision 1.42 Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Revert for the moment, creates problems on i386. Recommit exec_subr.c revision 1.79: Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Additionally, change VM_DEFAULT_ADDRESS_TOPDOWN to include user_stack_guard_size in the size reservation. Update VM_DEFAULT_ADDRESS32_TOPDOWN to include guard area. Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.5.14.1	20-Jul-2024	martin	Pull up following revision(s) (requested by rin in ticket #758): lib/libpthread/pthread_attr_getstack.3: revision 1.9 lib/libpthread/pthread_attr_getguardsize.3: revision 1.6 pthread: Document the setstack vs setguardsize bug. Suggest the safe, compatible workaround.
1.5	27-Feb-2025	andvar	s/tread/thread/
1.4	22-Oct-2017	abhinav	branches: 1.4.16; Add missing function names in the NAME section for rest of the man pages in libpthread
1.3	10-May-2013	christos	s/inherited/inherit/
1.2	08-Jul-2010	wiz	branches: 1.2.6; 1.2.12; Sort sections.
1.1	07-Jul-2010	jruoho	Split pthread_attr_getinheritsched() and pthread_attr_setinheritsched() to a separate page, and actually document these.
1.2.12.1	23-Jun-2013	tls	resync from head
1.2.6.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.4.16.1	02-Aug-2025	perseant	Sync with HEAD
1.7	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.6	09-Jul-2010	jruoho	Add missing prototypes. Noted by wiz@ -- thanks.
1.5	09-Jul-2010	wiz	Sort errors.
1.4	09-Jul-2010	jruoho	Rationalize by moving pthread_attr_setname_np(3) to pthread_attr_getname_np(3); and pthread_setname_np(3) to pthread_getname_np(3).
1.3	07-Jul-2010	wiz	Sort sections.
1.2	06-Jul-2010	jruoho	Same here; fix LIBRARY, add COMPATIBILITY/ERRORS, etc.
1.1	14-Dec-2007	yamt	branches: 1.1.2; document following functions. pthread_attr_getname_np pthread_attr_setname_np pthread_getname_np pthread_setname_np
1.1.2.2	09-Jan-2008	matt	sync with HEAD
1.1.2.1	14-Dec-2007	matt	file pthread_attr_getname_np.3 was added on branch matt-armv6 on 2008-01-09 01:36:32 +0000
1.3	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.2	08-Jul-2010	jruoho	Group also pthread_attr_getschedparam(3) and pthread_attr_getschedpolicy(3), as these two pages fit well together.
1.1	07-Jul-2010	jruoho	Split pthread_attr_getschedparam() and pthread_attr_setschedparam() to a separate page.
1.2	08-Jul-2010	jruoho	Group also pthread_attr_getschedparam(3) and pthread_attr_getschedpolicy(3), as these two pages fit well together.
1.1	07-Jul-2010	jruoho	Finally, split pthread_attr_getschedpolicy() and pthread_attr_setschedpolicy() to their own page.
1.4	23-Oct-2017	wiz	Remove superfluous Tn.
1.3	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.2	07-Jul-2010	njoly	Add missing list end.
1.1	07-Jul-2010	jruoho	Move pthread_attr_{g,s}etscope() to a separate page and try to document these better. Should fix PR lib/41831 from Wolfgang Stukenbrock. XXX: Please proofread.
1.9	07-Dec-2023	riastradh	pthread: Document the setstack vs setguardsize bug. Suggest the safe, compatible workaround.
1.8	23-Oct-2017	wiz	branches: 1.8.14; Remove superfluous Tn.
1.7	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.6	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.5	09-Jul-2010	jruoho	Note also alignment via mmap(2), as done in NetBSD.
1.4	09-Jul-2010	jruoho	Use .Ss for non-standard subtitle.
1.3	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.2	07-Jul-2010	jruoho	Fix some minor errors/typos and clarify.
1.1	07-Jul-2010	jruoho	Move the thread stack attribute functions to a separate page. In addition, document pthread_attr_getstack() and pthread_attr_setstack(). Try to also document these a little better (in particular, note some items in the long list of caveats and questions related to application-controlled thread stack).
1.8.14.1	20-Jul-2024	martin	Pull up following revision(s) (requested by rin in ticket #758): lib/libpthread/pthread_attr_getstack.3: revision 1.9 lib/libpthread/pthread_attr_getguardsize.3: revision 1.6 pthread: Document the setstack vs setguardsize bug. Suggest the safe, compatible workaround.
1.4	09-Jul-2010	jruoho	Add the last compatibility note for the NetBSD extensions.
1.3	30-Apr-2008	martin	branches: 1.3.8; Convert TNF licenses to new 2 clause variant
1.2	12-Nov-2003	wiz	branches: 1.2.32; Various fixes.
1.1	12-Nov-2003	christos	Document pthread_attr_setcreatesuspend_np, pthread_suspend_np, pthread_resume_np
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.3.8.1	30-Apr-2008	martin	file pthread_attr_setcreatesuspend_np.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.5	09-Jul-2010	jruoho	Rationalize by moving pthread_attr_setname_np(3) to pthread_attr_getname_np(3); and pthread_setname_np(3) to pthread_getname_np(3).
1.4	07-Jul-2010	wiz	Sort sections.
1.3	06-Jul-2010	jruoho	Same here; fix LIBRARY, add COMPATIBILITY/ERRORS, etc.
1.2	26-May-2008	wiz	branches: 1.2.6; Remove trailing whitespace.
1.1	14-Dec-2007	yamt	branches: 1.1.2; 1.1.6; 1.1.8; document following functions. pthread_attr_getname_np pthread_attr_setname_np pthread_getname_np pthread_setname_np
1.1.8.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.1.6.1	04-Jun-2008	yamt	sync with head
1.1.2.2	09-Jan-2008	matt	sync with HEAD
1.1.2.1	14-Dec-2007	matt	file pthread_attr_setname_np.3 was added on branch matt-armv6 on 2008-01-09 01:36:33 +0000
1.2.6.2	26-May-2008	wiz	Remove trailing whitespace.
1.2.6.1	26-May-2008	wiz	file pthread_attr_setname_np.3 was added on branch christos-time_t on 2008-05-26 08:41:43 +0000
1.8	22-Oct-2017	abhinav	Remove description of pthread_barrierattr_getpshared and pthread_barrierattr_setpshared These functions are described in pthread_barrierattr(3) man page
1.7	22-Oct-2017	abhinav	Add rest of the pthread_barrier functions in the NAME section
1.6	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.5	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.4	09-Jul-2010	jruoho	Update ERRORS, tidy SEE ALSO.
1.3	08-Jul-2010	wiz	Add comma in enumeration, sort errors.
1.2	08-Jul-2010	jruoho	Split long lines, .Dv NULL, note pthread_barrierattr_init(3).
1.1	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.23	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.22	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.21	29-Jan-2020	kamil	Use pthread_barrierattr_t and pthread_barrier_t magic fields Set respectively _PT_BARRIER_DEAD for pthread_barrier_destroy() and _PT_BARRIERATTR_DEAD for pthread_barrierattr_destroy(). Validate _PT_BARRIER_MAGIC in pthread_barrier_t and _PT_BARRIERATTR_MAGIC in pthread_barrierattr_t accordingly.
1.20	03-Jul-2016	christos	branches: 1.20.16; GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.19	29-Jan-2009	ad	pthread_barrier: Fix numerous stupid bugs. Surprising that nobody complained yet.
1.18	25-May-2008	ad	branches: 1.18.4; 1.18.6; PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.17	28-Apr-2008	martin	branches: 1.17.2; Remove clause 3 and 4 from TNF licenses
1.16	19-Nov-2007	ad	branches: 1.16.6; Remove the debuglog stuff. ktrace is more useful now.
1.15	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.14	16-Aug-2007	ad	branches: 1.14.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.13	04-Aug-2007	ad	branches: 1.13.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.12	24-Mar-2007	ad	branches: 1.12.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.11	05-Mar-2007	ad	Update to match changed pthread__park() interface.
1.10	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.9	17-Jan-2007	hubertf	Remove more duplicate #includes, and a few spurious whitespaces at EOL From Slava Semushin <slava.semushin@gmail.com>
1.8	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.7	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.6	08-Mar-2003	lukem	branches: 1.6.16; 1.6.18; add __RCSID()
1.5	15-Feb-2003	nathanw	Remove unnecessary inclusion of <assert.h>.
1.4	31-Jan-2003	nathanw	Use pthread__sched_sleepers() instead of iterating over sleep queues ourself.
1.3	25-Jan-2003	nathanw	Make pthread_barrier_wait() handle spurious wakeups from pthread__block() by adding a generation number to the barrier structure and incrementing it when the barrier fires. XXX this is an ABI change for anything using barriers, but the library is new enough and nothing in the tree uses barriers so I'm going to let it slide. Using the private data pointer for a field that will always be present would be excessive.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	07-Jan-2003	thorpej	branches: 1.1.2; file pthread_barrier.c was initially added on branch nathanw_sa.
1.1.2.1	07-Jan-2003	thorpej	Implement the pthread_barrier API.
1.6.18.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.6.16.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.12.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.12.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.13.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.13.2.1	04-Aug-2007	ad	file pthread_barrier.c was added on branch matt-mips64 on 2007-08-04 13:37:50 +0000
1.14.2.1	09-Jan-2008	matt	sync with HEAD
1.16.6.2	04-Jun-2008	yamt	sync with head
1.16.6.1	18-May-2008	yamt	sync with head.
1.17.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.18.6.2	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.18.6.1	25-May-2008	ad	file pthread_barrier.c was added on branch christos-time_t on 2008-05-25 17:05:29 +0000
1.18.4.1	02-Feb-2009	snj	Pull up following revision(s) (requested by ad in ticket #379): lib/libpthread/pthread_barrier.c: revision 1.19 pthread_barrier: Fix numerous stupid bugs. Surprising that nobody complained yet.
1.20.16.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.8	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.7	26-May-2008	wiz	branches: 1.7.6; Sort ERRORS.
1.6	30-Apr-2008	martin	branches: 1.6.2; Convert TNF licenses to new 2 clause variant
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3	04-Jul-2003	wiz	branches: 1.3.4; 1.3.6; Fix SEE ALSO.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.3.6.1	18-Jun-2005	tron	Pull up revision 1.4 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3.4.1	21-Jun-2005	riz	Pull up revision 1.4 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.5.20.2	04-Jun-2008	yamt	sync with head
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.7.6.2	26-May-2008	wiz	Sort ERRORS.
1.7.6.1	26-May-2008	wiz	file pthread_barrier_destroy.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.10	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.9	26-May-2008	wiz	branches: 1.9.6; Sort ERRORS.
1.8	30-Apr-2008	martin	branches: 1.8.2; Convert TNF licenses to new 2 clause variant
1.7	17-Jun-2005	peter	branches: 1.7.20; Fix various spelling errors. From Igor Sobrado in PR/29997.
1.6	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.5	04-Jul-2003	wiz	branches: 1.5.4; 1.5.6; Fix SEE ALSO.
1.4	04-Jul-2003	wiz	Drop trailing whitespace.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.5.6.2	18-Jun-2005	tron	Pull up revision 1.7 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.5.6.1	22-Mar-2005	tron	Pull up revision 1.6 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.5.4.1	21-Jun-2005	riz	Pull up revision 1.7 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.7.20.2	04-Jun-2008	yamt	sync with head
1.7.20.1	18-May-2008	yamt	sync with head.
1.8.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.9.6.2	26-May-2008	wiz	Sort ERRORS.
1.9.6.1	26-May-2008	wiz	file pthread_barrier_init.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.8	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.7	30-Apr-2008	martin	branches: 1.7.8; Convert TNF licenses to new 2 clause variant
1.6	17-Jun-2005	wiz	branches: 1.6.20; New sentence, new line. Break much too long line.
1.5	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4	04-Jul-2003	wiz	branches: 1.4.4; 1.4.6; Fix SEE ALSO.
1.3	04-Jul-2003	wiz	Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.4.6.2	18-Jun-2005	tron	Pull up revision 1.6 (requested by peter in ticket #473): New sentence, new line. Break much too long line.
1.4.6.1	18-Jun-2005	tron	Pull up revision 1.5 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4.4.1	21-Jun-2005	riz	Pull up revision 1.5 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.6.20.1	18-May-2008	yamt	sync with head.
1.7.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.7.8.1	30-Apr-2008	martin	file pthread_barrier_wait.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.14	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.13	22-Oct-2017	abhinav	branches: 1.13.16; All the four functions described in the man page conform to POSIX.1
1.12	22-Oct-2017	abhinav	Add missing word in the sentence
1.11	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.10	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.9	09-Jul-2010	wiz	Add missing word.
1.8	08-Jul-2010	jruoho	Ups. pthread_barrierattr_destroy(3) may fail with EINVAL.
1.7	08-Jul-2010	jruoho	Cleanup errors; no error returns are defined in NetBSD. (The error codes should be audited, and tested, for all pthread functions. Also the used separation between "shall fail" and "may fail" should probably be removed.)
1.6	30-Apr-2008	martin	branches: 1.6.8; Convert TNF licenses to new 2 clause variant
1.5	17-Jun-2005	peter	branches: 1.5.20; Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4	02-Nov-2003	wiz	branches: 1.4.4; 1.4.6; Typo; from Jared Yanovich via jmc@openbsd.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.4.6.1	18-Jun-2005	tron	Pull up revision 1.5 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4.4.1	21-Jun-2005	riz	Pull up revision 1.5 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.6.8.1	30-Apr-2008	martin	file pthread_barrierattr.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.13.16.1	02-Aug-2025	perseant	Sync with HEAD
1.6	12-Mar-2014	dholland	typo
1.5	09-Jul-2010	jruoho	branches: 1.5.6; 1.5.12; Rewrite this for clarity. Also remove AUTHORS; someone was proud enough to put himself as the author, even though the page was directly cut-and-pasted from the Open Group's specification.
1.4	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.3	30-Apr-2008	martin	branches: 1.3.8; Convert TNF licenses to new 2 clause variant
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.3.8.1	30-Apr-2008	martin	file pthread_cancel.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.5.12.1	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.5.6.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.51	04-Apr-2025	riastradh	pthread_cancelstub.c: Use restrict, not __restrict. Only reason to use __restrict is to make header files safe for pre-C99 clients, but we have built this code as C99 for many years (and we build it as C11 now anyway). No functional change intended. PR lib/59240: POSIX.1-2024: cancellation point audit
1.50	04-Apr-2025	riastradh	libpthread: Sort cancelstub definitions. No functional change intended. PR lib/59240: POSIX.1-2024: cancellation point audit
1.49	04-Apr-2025	riastradh	libpthread: Use typeof rather than copying signatures of cancelstubs. This would have caught my previous mistake with paccept. Omit needless declarations that are already covered by the compat//.h header files. No functional change intended. This is purely an improvement to build-time error detection. PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe PR lib/59247: pthread_cancelstub.c is inadequately tested
1.48	02-Apr-2025	riastradh	libpthread: Fix signature of _sys_paccept symbol for paccept(2). This is not, in fact, an alias for accept4(2): it has an extra argument for a signal mask to restore while sleeping. It would be nice if we had a .h file which could check the signature in both definition and use, but that might be tricky to arrange. PR lib/59240: POSIX.1-2024: cancellation point audit
1.47	31-Mar-2025	riastradh	libpthread(3): Add missing cancellation points. - accept4 - tcdrain XXX Should our nonstandard alias paccept(2) also be a cancellation point? PR lib/59240: POSIX.1-2024: cancellation point audit
1.46	31-Mar-2025	riastradh	pthread_cancel(3): Rework. Make pthread_setcancelstate(3) async-signal-safe. (As a side effect, this also makes pthread_setcanceltype(3) async-signal-safe, although that is not required.) PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.45	19-Jan-2024	christos	branches: 1.45.2; Add missing headers
1.44	28-Jul-2023	christos	Add epoll(2) from Theodore Preduta as part of GSoC 2023
1.43	19-Apr-2022	rillig	lib: remove CONSTCOND comment Since 2021-01-31, lint doesn't need it anymore for the common pattern of 'do ... while (0)'.
1.42	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.41	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.40	01-Oct-2021	christos	remove parameter names from decls.
1.39	01-Oct-2021	christos	PR/56424: Clay Mayers: recvfrom() is not a cancelation point as documented in pthread_setcanceltype.3
1.38	21-Mar-2013	christos	branches: 1.38.32; - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.37	04-Apr-2012	christos	branches: 1.37.2; trailing whitespace police.
1.36	04-Apr-2012	agc	Add a pthread cancel stub for sigwait, following Onno van der Linden's analysis in PR 45131. Kindly tested by Hisashi T Fujinaka (using csup as the test case) with a successful outcome. OK martin@
1.35	22-Apr-2011	joerg	branches: 1.35.4; 1.35.6; Don't kill the read(2) stub, just the magic around it.
1.34	21-Apr-2011	joerg	Disable Fortification for pthread and rump stubs.
1.33	21-Apr-2011	martin	Backout previous, it causes lots of test failures (tests/fs/nfs for example).
1.32	12-Apr-2011	christos	Fix SSP builds (Vladimir Kirillov)
1.31	26-Jan-2011	christos	make the code more re-usable
1.30	26-Jan-2011	christos	Moving the ssp check inside the source code does not work properly because the compiler loses information about the size of the object. So instead of the hacky #define mess we did before, add a way to inject our function between the user call and the system call.
1.29	25-Jan-2011	christos	Fix SSP build. XXX: This is gross.
1.28	06-Aug-2010	christos	branches: 1.28.2; make kevent(2) a cancelation point, and document properly all the cancelation points we currently support.
1.27	12-Aug-2009	enami	Make nanosleep cancelable again.
1.26	13-Jan-2009	christos	fix __sigtimedwait50
1.25	11-Jan-2009	christos	merge christos-time_t
1.24	29-Dec-2008	christos	branches: 1.24.2; revert previous. It was meant for the branch
1.23	28-Dec-2008	christos	adjust for time_t 64
1.22	08-Oct-2008	ad	branches: 1.22.2; 1.22.6; Adjust the compat stuff slightly so that the changes are mostly self contained (Makefile, pthread_compat.c).
1.21	29-Sep-2008	ad	make PTHREAD__COMPAT=1 Builds a libpthread that can be dropped into a NetBSD 2/3/4 chroot. This makes threading work in the chroot when using a NetBSD 5 kernel, no other modifications required.
1.20	28-Jun-2008	ad	Shut lint up.
1.19	28-Apr-2008	martin	branches: 1.19.2; Remove clause 3 and 4 from TNF licenses
1.18	02-Feb-2008	christos	branches: 1.18.4; PR/37932: Yakovetsky Vladimir: build distribution with USE_FORT fails Avoid read redefinition
1.17	24-Dec-2007	ad	- Use pthread__cancelled() in more places. - pthread_join(): assert that pthread_cond_wait() returns zero.
1.16	19-Nov-2007	ad	int -> ssize_t in a couple of places.
1.15	09-Oct-2007	rmind	Add cancellation stubs in libpthread for POSIX messages queues and asynchronous I/O. OK by <ad>.
1.14	04-Mar-2007	ad	branches: 1.14.6; Add __sigsuspend14, sigtimedwait as cancellation points.
1.13	13-Sep-2005	christos	XXX: Work around libpthread's "intimate" connection with libc.
1.12	21-Mar-2005	kleink	Include <sys/select.h> explicitly rather than relying on other headers to do it.
1.11	18-Mar-2005	kleink	Interpose cancellation points in pollts() and pselect(), bringing us to libc.so.12.127 and libpthread.so.0.6.
1.10	10-Mar-2005	kleink	branches: 1.10.2; Move up the definition of __LIBC12_SOURCE__; since <poll.h> now includes <sys/sigtypes.h> this is needed earlier.
1.9	21-May-2004	kleink	IEEE Std 1003.1-2001/Cor 2-2004, item XSH/TC2/D6/5: fdatasync() shall have cancellation points. Note: we ride today's resolver-related version bumps.
1.8	24-Nov-2003	cl	add CONSTCOND in constant condition.
1.7	21-Nov-2003	nathanw	Manually inline pthread__testcancel in these routines; two function calls' worth of overhead per cancellable syscall is overkill.
1.6	18-Nov-2003	thorpej	Userland portion of fsync_range(2), written by Bill Studenmund, and contributed by Wasabi Systems, Inc.
1.5	08-Mar-2003	lukem	add __RCSID()
1.4	15-Feb-2003	nathanw	Implement nanosleep() at userlevel. Threaded applications seem to like to sleep a lot, and there's no need for each such thread to consume kernel resources. (accidentally checked the pthread.c part of this in yesterday; no reason not to finish the job)
1.3	27-Jan-2003	nathanw	Add cancellation stubs for accept() and connect().
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Jan-2002	nathanw	branches: 1.1.2; file pthread_cancelstub.c was initially added on branch nathanw_sa.
1.1.2.6	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.5	03-Nov-2002	skrll	Whitespace.
1.1.2.4	14-Aug-2002	nathanw	Oops, re-add nanosleep stub, which had been accidentally deleted.
1.1.2.3	02-Aug-2002	nathanw	Adapt to new syscall stub names. Create strong aliases for override functions.
1.1.2.2	20-May-2002	nathanw	Many signal improvements: - Implement sigsuspend() - Take pending signals that are unblocked in pthread_sigmask(). - Tweak the signal mask passed by sigaction() to permit us to manage our own thread-specific signal masks. - Don't try to deliver signals to zombie threads. - Prevent a race between deciding a thread can take a signal and actually taking it. - Don't put threads that are blocked in a syscall on the run queue. - Add debug logging.
1.1.2.1	28-Jan-2002	nathanw	Add cancellation-wrapped syscall stubs that override the weak symbols in libsyscall.
1.10.2.2	21-Mar-2005	tron	Pull up revision 1.12 (requested by kleink in ticket #38): Include <sys/select.h> explicitly rather than relying on other headers to do it.
1.10.2.1	20-Mar-2005	tron	Pull up revision 1.11 (requested by kleink in ticket #27): Interpose cancellation points in pollts() and pselect(), bringing us to libc.so.12.127 and libpthread.so.0.6.
1.14.6.3	23-Mar-2008	matt	sync with HEAD
1.14.6.2	09-Jan-2008	matt	sync with HEAD
1.14.6.1	06-Nov-2007	matt	sync with HEAD
1.18.4.1	18-May-2008	yamt	sync with head.
1.19.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.22.6.1	21-Apr-2010	matt	sync to netbsd-5
1.22.2.1	05-Sep-2009	bouyer	Pull up following revision(s) (requested by enami in ticket #921): lib/libpthread/pthread_misc.c: revision 1.14 via patch lib/libpthread/pthread_cancelstub.c: revision 1.27 via patch Make nanosleep cancelable again.
1.24.2.3	10-Jan-2009	christos	use the proper sigtimedwait.
1.24.2.2	29-Dec-2008	christos	commit changes to the right branch.
1.24.2.1	29-Dec-2008	christos	file pthread_cancelstub.c was added on branch christos-time_t on 2008-12-29 15:10:58 +0000
1.28.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.35.6.2	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.35.6.1	09-Apr-2012	riz	Pull up following revision(s) (requested by agc in ticket #174): lib/libpthread/pthread_cancelstub.c: revision 1.36 Add a pthread cancel stub for sigwait, following Onno van der Linden's analysis in PR 45131. Kindly tested by Hisashi T Fujinaka (using csup as the test case) with a successful outcome. OK martin@
1.35.4.2	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.35.4.1	17-Apr-2012	yamt	sync with head
1.37.2.1	23-Jun-2013	tls	resync from head
1.38.32.1	05-Oct-2021	martin	Pull up following revision(s) (requested by christos in ticket #1355): lib/libpthread/pthread_cancelstub.c: revision 1.39 lib/libc/sys/Makefile.inc: revision 1.247 lib/libpthread/pthread_cancelstub.c: revision 1.40 PR/56424: Clay Mayers: recvfrom() is not a cancelation point as documented in pthread_setcanceltype.3 remove parameter names from decls.
1.45.2.1	02-Aug-2025	perseant	Sync with HEAD
1.6	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.5	04-May-2008	martin	branches: 1.5.8; Move TNF licenses to 2 clause form
1.4	04-Jul-2003	wiz	branches: 1.4.32; .Pp fixes.
1.3	04-Jul-2003	wiz	Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.4.32.1	18-May-2008	yamt	sync with head.
1.5.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.5.8.1	04-May-2008	martin	file pthread_cleanup_push.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.7	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.6	08-Dec-2017	kre	Revert last 2 updates - these are, of course, not needed at all...
1.5	08-Dec-2017	kre	This time do _lwp_park() timeout unconsting correctly not just compilably.
1.4	08-Dec-2017	kre	Deal with more lwp_park() timestamp unconsting
1.3	31-Jan-2014	christos	remove compatibility code for handling CLOCK_MONOTONIC and handle it in the syscall directly.
1.2	08-Oct-2008	ad	branches: 1.2.4; 1.2.20; 1.2.26; Adjust the compat stuff slightly so that the changes are mostly self contained (Makefile, pthread_compat.c).
1.1	29-Sep-2008	ad	make PTHREAD__COMPAT=1 Builds a libpthread that can be dropped into a NetBSD 2/3/4 chroot. This makes threading work in the chroot when using a NetBSD 5 kernel, no other modifications required.
1.2.26.1	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.2.20.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.2.4.2	08-Oct-2008	ad	Adjust the compat stuff slightly so that the changes are mostly self contained (Makefile, pthread_compat.c).
1.2.4.1	08-Oct-2008	ad	file pthread_compat.c was added on branch christos-time_t on 2008-10-08 08:27:08 +0000
1.9	28-Jul-2018	kre	PR lib/53477 (rudolf at eq.cz) - correct an obvious mistake.
1.8	22-Oct-2017	abhinav	branches: 1.8.2; 1.8.4; Add missing function names in the NAME section for rest of the man pages in libpthread
1.7	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.6	12-Nov-2012	uwe	Use .Vt type var No = Dv INITIALIZER; to provide examples of static initialization in SYNOPSIS section. .Va macro does the wrong thing (check groff PostScript output) and the need for .Pp kludge (now dropped) should have been an indication too. While here move static initialization example to be right after the declaration of *_init().
1.5	09-Jul-2010	wiz	branches: 1.5.6; 1.5.12; Fix typo.
1.4	09-Jul-2010	jruoho	Rearrange, reword, clarify. Remove duplicate paragraphs and recurring sentences. Update the ERRORS to reflect reality in NetBSD.
1.3	09-Jul-2010	wiz	Mark up NULL.
1.2	08-Jul-2010	wiz	Sort errors.
1.1	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.5.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.5.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.8.4.1	10-Jun-2019	christos	Sync with HEAD
1.8.2.1	06-Sep-2018	pgoyette	Sync with HEAD Resolve a couple of conflicts (result of the uimin/uimax changes)
1.78	31-Mar-2025	riastradh	pthread_cancel(3): Rework. Make pthread_setcancelstate(3) async-signal-safe. (As a side effect, this also makes pthread_setcanceltype(3) async-signal-safe, although that is not required.) PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.77	12-Feb-2022	riastradh	branches: 1.77.4; libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.76	14-Jun-2020	ad	Another bug. The CAS loop in pthread_cond_signal() could race against the thread it is trying to awake. The thread could exit the condvar and then reinsert itself at the head of the list with a new waiter behind it. It's likely possible to fix this in a way that's wait-free but for now just fix the bug.
1.75	13-Jun-2020	riastradh	Nix trailing whitespace.
1.74	10-Jun-2020	ad	- Make pthread_condvar and pthread_mutex work on the stack rather than in pthread_t, so there's less chance of bad things happening if someone calls (for example) pthread_cond_broadcast() from a signal handler. - Remove all the deferred waiter handling except for the one case that really matters which is transferring waiters from condvar -> mutex on wakeup, and do that by splicing the condvar's waiters onto the mutex. - Remove the mutex waiters bit as it's another complication that's not strictly needed.
1.73	06-Jun-2020	ad	Adjust previous. In the condvar case the wakeup might already have been eaten.
1.72	04-Jun-2020	riastradh	Nix trailing whitespace. NFCI.
1.71	03-Jun-2020	ad	Deal with a couple of problems with threads being awoken early due to timeouts or cancellation where: - The restarting thread calls _lwp_exit() before another thread gets around to waking it with _lwp_unpark(), leading to ESRCH (observed by joerg@). (I may have removed a similar check mistakenly over the weekend.) - The restarting thread considers itself gone off the sleep queue but at the same time another thread is part way through waking it, and hasn't fully completed that operation yet by setting thread->pt_mutexwait = 0. I think that could have potentially lead to the list of waiters getting messed up given the right circumstances.
1.70	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.69	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.68	14-Apr-2020	joerg	Drop most of the logic associated with pthread__started. The pthread_cond logic is a questionable optimisation at best and the post-fork logic is plainly broken.
1.67	29-Jan-2020	kamil	Use pthread_condattr_t and pthread_cond_t magic fields Validate _PT_CONDATTR_MAGIC and _PT_COND_MAGIC respectively.
1.66	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.65	08-Dec-2017	christos	branches: 1.65.4; 1.65.6; unconst the timestamp
1.64	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.63	31-Jan-2014	christos	remove compatibility code for handling CLOCK_MONOTONIC and handle it in the syscall directly.
1.62	31-Jan-2014	christos	PR/44756: Sad Clouds: Prevent leakage of errno = ESRCH from _lwp_park. This has two parts: - in pthread_cond_timedwait() if the thread we are trying to unpark exited, retry the the _lwp_park call without it. - pthread_mutex() was affecting errno since it is calling _lwp_park() from pthread_mutex_lock_slow(). preserve the original errno. Note that the example problem still causes an occassional deadlock on machines with many CPUs and it is the same deadlock we observe with named.
1.61	01-Apr-2013	christos	for safety, declare mono on the outermost block it is used.
1.60	28-Mar-2013	christos	PR/47703: Yasushi Oshima: pthread_cond_timedwait() does not wait after call pthread_condattr_setclock(CLOCK_MONOTONIC) _lwp_park(2) expects a realtime clock, and it gets passed a monotonic one. Since monotonic < real, it never sleeps. This patch adjusts the monotonic clock to be a real one before it passes is to _lwp_park(2). This is the minimal hacky fix and it will be fixed properly in _lwp_park(2) in the future. XXX: pullup to 6.
1.59	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.58	03-Nov-2012	christos	add pthread_condattr_setclock(3)
1.57	15-Jun-2012	joerg	branches: 1.57.2; Do not mark pthread_cond_timedwait explicitly as inlineable, since it calls pthread__self, which is static.
1.56	02-Nov-2010	skrll	branches: 1.56.6; 1.56.8; Spell immediately correctly.
1.55	23-Mar-2010	drochner	catch up with the __RENAME of nanosleep(2) a while ago, otherwise we get the compatibility function which assumes a different struct timespec
1.54	18-Jan-2009	lukem	fix -Wsign-compare issues
1.53	25-Oct-2008	yamt	branches: 1.53.2; 1.53.4; remove ; after __weak_alias()
1.52	02-Aug-2008	matt	Change some type to eliminate some lint warnings.
1.51	18-Jul-2008	pooka	add pthread_cond_has_waiters_np()
1.50	28-Jun-2008	ad	Avoid spurious assertion failure.
1.49	23-Jun-2008	ad	Split cond_signal/cond_broadcast into inline and non-inline parts, like the kernel.
1.48	21-Jun-2008	ad	PR lib/38948: libpthread, java: thread awakening itself
1.47	26-May-2008	ad	Add a comment describing some limitiations of this implementation.
1.46	26-May-2008	ad	- Eliminate one test+branch. - Fix a comment. - Fix a lock leak.
1.45	25-May-2008	ad	pthread_cond_timedwait: don't leak EINTR or EALREADY to the caller.
1.44	25-May-2008	ad	Fix error in previous.
1.43	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.42	28-Apr-2008	martin	branches: 1.42.2; Remove clause 3 and 4 from TNF licenses
1.41	14-Feb-2008	ad	branches: 1.41.4; Adjust mutex/rwlock definitions to match reality now that there is only one implementation of each. PR lib/38030.
1.40	24-Dec-2007	ad	- Use pthread__cancelled() in more places. - pthread_join(): assert that pthread_cond_wait() returns zero.
1.39	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.38	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.37	13-Sep-2007	ad	Add a per-mutex deferred wakeup flag so that threads doing something like the following do not wake other threads early: pthread_mutex_lock(&mutex); pthread_cond_broadcast(&cond); foo = malloc(100); /* takes libc mutexes */ pthread_mutex_unlock(&mutex);
1.36	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.35	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.34	16-Aug-2007	ad	branches: 1.34.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.33	07-Aug-2007	ad	Change the signature of _lwp_park() to accept an lwpid_t and second hint pointer, but do so in a way that remains compatible with older pthread libraries. This can be used to wake another thread before the calling thread goes asleep, saving at least one syscall + involuntary context switch. This turns out to be a fairly large win on the condvar benchmarks that I have tried.
1.32	04-Aug-2007	ad	branches: 1.32.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.31	12-Apr-2007	ad	branches: 1.31.2; Mirror a fix made to the kernel's condvars: After resuming execution, the thread must check to see if it has been restarted as a result of pthread_cond_signal(). If it has, but cannot take the wakeup (because of eg a pending Unix signal or timeout) then try to ensure that another thread sees it. This is necessary because there may be multiple waiters, and at least one should take the wakeup if possible.
1.30	24-Mar-2007	ad	- Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.29	21-Mar-2007	ad	Move PTHREADD_ADD(PTHREADD_COND_WOKEUP) back to the correct spot.
1.28	20-Mar-2007	ad	- When signalling waiters, try not to awaken them immediatley. If we hold the mutex that the waiters are using to synchronise, then transfer them to the mutex's waiters list so that the wakeup is deferred until release of the mutex. Improves the timings for CV sleep/wakeup by between 30-100% in tests conducted locally on a UP system. There can be a penalty for MP systems when only one thread is being awoken, but in practice I think it won't be be an issue. - pthread_signal: search for a thread that does not have a pending wakeup. Threads can have a pending wakeup and still be on the waiters list if we clash with an earlier pthread_cond_broadcast().
1.27	14-Mar-2007	ad	Cosmetic changes.
1.26	05-Mar-2007	ad	- Update to match changed pthread__park() interface. - Fix a bug where a thread could be "reentered" onto the waiters queue.
1.25	05-Mar-2007	ad	Undo previous, it matches IEEE 1003.1.
1.24	05-Mar-2007	ad	Drop the interlock if cancelled.
1.23	02-Mar-2007	ad	Fix a sleep/wakeup race with condvars.
1.22	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.21	02-Mar-2007	ad	Don't grab the state lock to check for cancellation around condition variables, as _lwp_wakeup/lwp_park provide the necessary barrier.
1.20	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.19	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.18	06-Jan-2005	mycroft	branches: 1.18.10; 1.18.12; gettimeofday();TIMEVAL_TO_TIMESPEC(); is exactly equivalent to clock_gettime(CLOCK_REALTIME), except the latter may have more preicison some day. So, use that.
1.17	10-Dec-2004	nathanw	Correctly return ETIMEDOUT when the absolute time is in the past, in the nonthreaded case. Fixes, and fix from, PR lib/25961.
1.16	27-Jul-2004	nathanw	In cond_wait() and cond_timedwait(), do the ERRORCHECK testing of the waiters list in all cases, not just on cancellation; there are other sources of spurious wakeups, such as single-stepping in the debugger. regress/lib/libpthread/conddestroy1 now passes.
1.15	03-May-2004	kleink	In the nothread version, don't return EINTR if select() was interrupted since this value is explicitly ruled out by POSIX. Instead, return 0, like a spurious wakeup. From YAMAMOTO Takashi in PR standards/24240.
1.14	24-Nov-2003	cl	branches: 1.14.2; Update mutex/rwlock/sem code to match recent change in cond code.
1.13	24-Nov-2003	nathanw	Fix a race between timed wait callbacks and manual signal/broadcasting accidentally introduced in rev. 1.5. Noted by Christian Limpach.
1.12	21-Nov-2003	nathanw	Prevent ptc_mutex from remaining set if a CV sleep is woken by cancellation: * Arrange to not set ptc_mutex until after the pre-sleep cancellation test. * In the post-sleep cancellation test, check if there are no more sleepers and clear ptc_mutex if so. While here, sprinkle some __predict_false() around the cancellation tests.
1.11	23-Apr-2003	nathanw	Use pthread__error() instead of pthread__abort().
1.10	18-Apr-2003	nathanw	More agressive assertions. Change a number of detected conditions, which officially have undefined behavior, from returning an error code to raising an assertion failure. Also, don't bother to explicitly test for (illegal) null pointers and return an error; they'll bomb out soon enough.
1.9	16-Apr-2003	nathanw	When a thread sleeps on a mutex or cv, have it put itself on the front of the sleep queue rather than the back. This is more cache-friendly behavior and within the (lack of) constraints on wakeup ordering imposed on equal-priority threads.
1.8	08-Mar-2003	lukem	add __RCSID()
1.7	15-Feb-2003	nathanw	Remove debug toggle and add debug counter for signals and broadcasts that actually wake another thread up.
1.6	01-Feb-2003	nathanw	Arrange to pause for a while if pthread_cond_wait() or pthread_cond_timedwait() is called before any threads have been created and the SA infrastructure is up and running. Addresses PR lib/20139. XXX probably need to do this for all of the pthread_*_timedlock() functions, too.
1.5	31-Jan-2003	nathanw	Use pthread__sched_sleepers() instead of iterating over sleep queues ourself.
1.4	31-Jan-2003	nathanw	Do a similar tuneup on pthread_cond_signal() and pthread_cond_broadcast(): use double-checked locking to avoid pthread__self() and pthread_spinlock() when signaling or broadcasting on a condition variable with no waiters.
1.3	27-Jan-2003	nathanw	Add debug counters for mutex and condvar operations.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	25-Jul-2001	nathanw	branches: 1.1.2; file pthread_cond.c was initially added on branch nathanw_sa.
1.1.2.18	11-Jan-2003	skrll	Improve error checking. OK'd by Nathan.
1.1.2.17	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.16	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.15	16-Dec-2002	nathanw	Ensure that only one of an alarm callback or a signal/broadcast wakeup can remove a thread from a condition-variable sleep and schedule it. Don't call pthread__alarm_fired() until after pthread__alarm_del().
1.1.2.14	28-Oct-2002	nathanw	A little whitespace cleanup, and use PTQ_INIT() rather than a structure copy to clear the blocked queue in pthread_cond_broadcast().
1.1.2.13	07-Oct-2002	nathanw	Put all assigning and testing of ptc_mutex inside #ifdef ERRORCHECK.
1.1.2.12	16-Jul-2002	nathanw	Adapt to alarm changes.
1.1.2.11	16-Jul-2002	nathanw	Clear the ptc_mutex field in the pthread_cond_wait() callback if the timed_wait was the last waiter.
1.1.2.10	20-May-2002	nathanw	Record the sleep object in pthread_cond_timedwait(). Add debug logging (disabled by default).
1.1.2.9	26-Apr-2002	nathanw	Track the synchronization object being slept on.
1.1.2.8	11-Apr-2002	nathanw	Revert weak aliases.
1.1.2.7	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.6	28-Jan-2002	nathanw	Implement pthread_cond_timedwait(). Cancellation support.
1.1.2.5	30-Dec-2001	nathanw	pt_queue_t -> pthread_queue_t.
1.1.2.4	07-Aug-2001	nathanw	Initialize the mutex in the condition variable structure in pthread_cond_init().
1.1.2.3	06-Aug-2001	nathanw	broadacst->broadcast (Regression tests can also catch spelling errors!)
1.1.2.2	25-Jul-2001	nathanw	Stadardize and clean up use of ERRORCHECK. Implement pthread_{cond,mutex}attr_{init,destroy} and make the relevant functions check for their validity. (No non-default attribute values are supported, but these interfaces are required anyway).
1.1.2.1	25-Jul-2001	nathanw	Implement most of condition variables (pthread_cond_timedwait() is not yet done).
1.14.2.2	04-Oct-2004	jmc	branches: 1.14.2.2.2; Pullup rev 1.16 (requested by oster in ticket #885) In cond_wait() and cond_timedwait(), do the ERRORCHECK testing of the waiters list in all cases, not just on cancellation; there are other sources of spurious wakeups, such as single-stepping in the debugger.
1.14.2.1	06-May-2004	jmc	Pullup rev 1.15 (requested by kleink in ticket #255) In the nothread version, don't return EINTR if select() was interrupted since this value is explicitly ruled out by POSIX. Instead, return 0, like a spurious wakeup. PR#24240.
1.14.2.2.2.1	08-Apr-2005	tron	Pull up revision 1.17 (requested by nathanw in ticket #1065): Correctly return ETIMEDOUT when the absolute time is in the past, in the nonthreaded case. Fixes, and fix from, PR lib/25961.
1.18.12.2	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.18.12.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.18.10.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.31.2.5	10-Sep-2007	skrll	Reduce diff to HEAD.
1.31.2.4	10-Sep-2007	skrll	Sync with HEAD.
1.31.2.3	03-Sep-2007	skrll	Sync with HEAD.
1.31.2.2	15-Aug-2007	skrll	Sync with HEAD.
1.31.2.1	18-Jul-2007	skrll	Initial work on provided correctly aligned __cpu_simple_lock_t for hppa and first attempt at adapting i386 to the changes. More to come.
1.32.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.32.2.1	04-Aug-2007	ad	file pthread_cond.c was added on branch matt-mips64 on 2007-08-04 13:37:50 +0000
1.34.2.3	23-Mar-2008	matt	sync with HEAD
1.34.2.2	09-Jan-2008	matt	sync with HEAD
1.34.2.1	06-Nov-2007	matt	sync with HEAD
1.41.4.2	04-Jun-2008	yamt	sync with head
1.41.4.1	18-May-2008	yamt	sync with head.
1.42.2.2	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.42.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.53.4.2	25-Oct-2008	yamt	remove ; after __weak_alias()
1.53.4.1	25-Oct-2008	yamt	file pthread_cond.c was added on branch christos-time_t on 2008-10-25 14:14:12 +0000
1.53.2.1	20-Feb-2014	sborrill	Pull up the following revisions(s) (requested by prlw1 in ticket #1898): lib/libpthread/pthread_cond.c: revision 1.62 lib/libpthread/pthread_mutex.c: revision 1.57,1.59 Partial fix for thread deadlock commonly observed with named. Also address PR/44756.
1.56.8.4	20-Feb-2014	sborrill	Pull up the following revisions(s) (requested by prlw1 in ticket #1029): lib/libpthread/pthread_cond.c: revision 1.62 lib/libpthread/pthread_mutex.c: revision 1.57,1.59 Partial fix for thread deadlock commonly observed with named. Also address PR/44756.
1.56.8.3	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.56.8.2	20-Apr-2013	bouyer	Pull up following revision(s) (requested by christos in ticket #862): lib/libpthread/pthread_cond.c: revision 1.60 lib/libpthread/pthread_cond.c: revision 1.61 PR/47703: Yasushi Oshima: pthread_cond_timedwait() does not wait after call pthread_condattr_setclock(CLOCK_MONOTONIC) _lwp_park(2) expects a realtime clock, and it gets passed a monotonic one. Since monotonic < real, it never sleeps. This patch adjusts the monotonic clock to be a real one before it passes is to _lwp_park(2). This is the minimal hacky fix and it will be fixed properly in _lwp_park(2) in the future. XXX: pullup to 6. for safety, declare mono on the outermost block it is used.
1.56.8.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #722): lib/libpthread/pthread_cond.c: revision 1.58 lib/libpthread/pthread_condattr.3: revision 1.8 lib/libpthread/pthread.h: revision 1.35 add pthread_condattr_setclock(3)
1.56.6.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.56.6.2	16-Jan-2013	yamt	sync with (a bit old) head
1.56.6.1	30-Oct-2012	yamt	sync with head
1.57.2.3	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.57.2.2	23-Jun-2013	tls	resync from head
1.57.2.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.65.6.1	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.65.4.2	21-Apr-2020	martin	Sync with HEAD
1.65.4.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.77.4.1	02-Aug-2025	perseant	Sync with HEAD
1.8	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.7	26-May-2008	wiz	branches: 1.7.6; Remove trailing whitespace.
1.6	26-May-2008	ad	Note that when calling pthread_cond_broadcast/signal, the same mutex as passed to wait/timedwait must be held.
1.5	04-May-2008	martin	branches: 1.5.2; Move TNF licenses to 2 clause form
1.4	17-Jun-2005	peter	branches: 1.4.20; Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3	04-Jul-2003	wiz	branches: 1.3.4; 1.3.6; Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.6.1	18-Jun-2005	tron	Pull up revision 1.4 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3.4.1	21-Jun-2005	riz	Pull up revision 1.4 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4.20.2	04-Jun-2008	yamt	sync with head
1.4.20.1	18-May-2008	yamt	sync with head.
1.5.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.7.6.2	26-May-2008	wiz	Remove trailing whitespace.
1.7.6.1	26-May-2008	wiz	file pthread_cond_broadcast.3 was added on branch christos-time_t on 2008-05-26 08:42:21 +0000
1.5	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.4	26-May-2008	wiz	branches: 1.4.6; Sort ERRORS.
1.3	04-May-2008	martin	branches: 1.3.2; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.2	04-Jun-2008	yamt	sync with head
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.4.6.2	26-May-2008	wiz	Sort ERRORS.
1.4.6.1	26-May-2008	wiz	file pthread_cond_destroy.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.11	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.10	20-May-2010	jruoho	Note the initializer macros.
1.9	26-May-2008	wiz	branches: 1.9.6; Sort ERRORS.
1.8	04-May-2008	martin	branches: 1.8.2; Move TNF licenses to 2 clause form
1.7	17-Jun-2005	wiz	branches: 1.7.20; New sentence, new line.
1.6	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.5	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.4	04-Jul-2003	wiz	branches: 1.4.4; 1.4.6; Fix typo.
1.3	04-Jul-2003	wiz	Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.4.6.2	18-Jun-2005	tron	Pull up revision 1.6 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4.6.1	22-Mar-2005	tron	Pull up revision 1.5 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.4.4.1	21-Jun-2005	riz	Pull up revision 1.6 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.7.20.2	04-Jun-2008	yamt	sync with head
1.7.20.1	18-May-2008	yamt	sync with head.
1.8.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.9.6.2	26-May-2008	wiz	Sort ERRORS.
1.9.6.1	26-May-2008	wiz	file pthread_cond_init.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.16	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.15	20-May-2010	jruoho	.Fa -> .Fn.
1.14	18-May-2010	jruoho	Xref timespec(3).
1.13	02-Jul-2009	rumble	"unblocks the mutex" -> "unlocks the mutex"
1.12	11-Jan-2009	christos	merge christos-time_t
1.11	31-Dec-2008	wiz	Bump date for previous.
1.10	31-Dec-2008	christos	mention that these may fail with EPERM. From Anon Ymous
1.9	26-May-2008	wiz	branches: 1.9.6; Remove duplicate (pasto?) RETURN VALUES section.
1.8	26-May-2008	ad	More blurb about the mutex and limitations.
1.7	04-May-2008	martin	branches: 1.7.2; Move TNF licenses to 2 clause form
1.6	21-Mar-2005	kleink	branches: 1.6.20; Add restrict qualifiers to <pthread.h> function arguments.
1.5	04-Jul-2003	wiz	branches: 1.5.6; New sentence, new line.
1.4	04-Jul-2003	wiz	Fix SEE ALSO.
1.3	04-Jul-2003	wiz	Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.5.6.1	22-Mar-2005	tron	Pull up revision 1.6 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.6.20.2	04-Jun-2008	yamt	sync with head
1.6.20.1	18-May-2008	yamt	sync with head.
1.7.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.9.6.2	11-Jan-2009	christos	merge with head.
1.9.6.1	26-May-2008	christos	file pthread_cond_wait.3 was added on branch christos-time_t on 2009-01-11 01:21:59 +0000
1.13	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.12	28-Mar-2017	maya	branches: 1.12.24; Remove outdated CAVEATS. Not sure everything is standards compliant, but I've been told non-default values are supported and pshared exists.
1.11	05-Jul-2016	wiz	branches: 1.11.2; 1.11.4; Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.10	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.9	03-Nov-2012	wiz	Fix pasto.
1.8	03-Nov-2012	christos	add pthread_condattr_setclock(3)
1.7	09-Jul-2010	jruoho	branches: 1.7.6; 1.7.8; 1.7.12; Re-add EINVAL for pthread_condattr_destroy(3) (misread the pthread__error()).
1.6	09-Jul-2010	jruoho	Remove error conditions. Add CAVEATS to note the questionable value of the functions in NetBSD, which does not support additional condition attributes. Note that these do not conform to SUSv4, where two additional attributes are mandated.
1.5	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.4	04-May-2008	martin	branches: 1.4.8; Move TNF licenses to 2 clause form
1.3	17-Jun-2005	peter	branches: 1.3.20; Fix various spelling errors. From Igor Sobrado in PR/29997.
1.2	08-Jun-2003	thorpej	branches: 1.2.4; 1.2.6; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.6.1	18-Jun-2005	tron	Pull up revision 1.3 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.2.4.1	21-Jun-2005	riz	Pull up revision 1.3 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3.20.1	18-May-2008	yamt	sync with head.
1.4.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.4.8.1	04-May-2008	martin	file pthread_condattr.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.7.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.7.8.2	29-Apr-2013	riz	Pull up following revision(s) (requested by enami in ticket #877): lib/libpthread/pthread_condattr.3: revision 1.9 Fix pasto.
1.7.8.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #722): lib/libpthread/pthread_cond.c: revision 1.58 lib/libpthread/pthread_condattr.3: revision 1.8 lib/libpthread/pthread.h: revision 1.35 add pthread_condattr_setclock(3)
1.7.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.11.4.1	21-Apr-2017	bouyer	Sync with HEAD
1.11.2.1	26-Apr-2017	pgoyette	Sync with HEAD
1.12.24.1	02-Aug-2025	perseant	Sync with HEAD
1.9	29-Apr-2023	uwe	pthread_create(3): minor markup tweaks
1.8	29-Apr-2023	jschauma	delete spurious space
1.7	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.6	07-Jun-2010	dholland	Improve wording describing the behavior of the attributes argument, and add reference to pthread_attr(3), as requested in PR 42871. The text added is different from but based on a suggestion by Matthew Mondor.
1.5	02-May-2008	martin	branches: 1.5.8; Move TNF licenses to 2 clause form
1.4	21-Mar-2005	kleink	branches: 1.4.20; Add restrict qualifiers to <pthread.h> function arguments.
1.3	04-Jul-2003	wiz	branches: 1.3.6; Mark up a defined value.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.6.1	22-Mar-2005	tron	Pull up revision 1.4 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.4.20.1	18-May-2008	yamt	sync with head.
1.5.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.5.8.1	02-May-2008	martin	file pthread_create.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.2	10-Nov-2011	wiz	branches: 1.2.4; Fix typo.
1.1	10-Nov-2011	yamt	document pthread_curcpu_np
1.2.4.2	17-Apr-2012	yamt	sync with head
1.2.4.1	10-Nov-2011	yamt	file pthread_curcpu_np.3 was added on branch yamt-pagecache on 2012-04-17 00:05:31 +0000
1.15	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.14	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.13	16-Aug-2007	ad	branches: 1.13.2; - Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.12	02-Mar-2007	ad	branches: 1.12.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.11	20-Jan-2007	christos	remove unused variable/code.
1.10	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.9	14-Dec-2006	ad	pthread__debuglog_printf(): check for linebuf == NULL.
1.8	14-Mar-2004	cl	add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.7	02-Jan-2004	cl	logging/debugging changes: - add PTHREAD_PID_DEBUG which prints the pid before each debuglog line - output thread returned in pthread__next - add asserts in pthread__sched akin to asserts in pthread__sched_bulk: check if scheduled thread is at front/end of queue - pthread__upcall: output event/interrupted LWP count instead of LWPid of the first event/interrupted LWP (since unblock upcalls can have multiple event LWPs). - pthread__find_interrupted: output LWPid here
1.6	16-Jun-2003	nathanw	Dodge a potential race condition in pthread__debuglog_printf(). It's still possible for multiple threads to write into the same space, but they shouldn't be able to corrupt the write pointer in the process. Also, check for pointer-lapping a bit more carefully in the wrap vs. non-wrap case.
1.5	16-Apr-2003	nathanw	Fix a fencepost error in writing to the debug buffer.
1.4	08-Mar-2003	lukem	add __RCSID()
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	17-Jul-2001	nathanw	branches: 1.1.2; file pthread_debug.c was initially added on branch nathanw_sa.
1.1.2.12	13-Jan-2003	nathanw	Textual names for event counters.
1.1.2.11	22-Oct-2002	nathanw	Copy the debug counters before printing anything out, to avoid observing the effect of printing them.
1.1.2.10	20-May-2002	nathanw	The temporary sprintf buffer doesn't need to be static.
1.1.2.9	24-Apr-2002	nathanw	Add a variable that tracks whether the process is being debugged.
1.1.2.8	06-Feb-2002	nathanw	Move a couple of debugging declarations to pthread_debug.c, where they belong. Add a debug routine to print the pthread event counters if the environment variable PTHREAD_DEBUGCOUNTERS is set.
1.1.2.7	28-Jan-2002	nathanw	Create the debug log with wider permissions. Clean up a couple of error messages.
1.1.2.6	30-Dec-2001	nathanw	Only do debug logging if the environment variable PTHREAD_DEBUGLOG is set.
1.1.2.5	31-Jul-2001	nathanw	Add a "force" argument to pthread__debuglog_init(), to reset buffer parameters even when the magic value seems okay.
1.1.2.4	27-Jul-2001	nathanw	Account for the size of the header structure when computing the usable debug buffer size.
1.1.2.3	25-Jul-2001	nathanw	Fix printf-style varargs to err(); add some includes.
1.1.2.2	24-Jul-2001	nathanw	Log the PID as well as the program name when starting up.
1.1.2.1	17-Jul-2001	nathanw	Add a mechanisim for debugging that is less likely to change scheduling behaviour than using printf (writing to a shared memory segment), and a simple tool for dumping the buffer. Partly inspired by the kernel msgbuf code.
1.12.2.1	03-Sep-2007	skrll	Sync with HEAD.
1.13.2.1	09-Jan-2008	matt	sync with HEAD
1.13	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.12	24-Sep-2007	ad	Kill PTHREAD_SPIN_DEBUG - it's not must use with 1:1.
1.11	16-Aug-2007	ad	branches: 1.11.2; - Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.10	01-Aug-2007	ad	branches: 1.10.2; Remove unused counters.
1.9	02-Mar-2007	ad	branches: 1.9.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.8	14-Mar-2004	cl	branches: 1.8.16; 1.8.18; add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.7	02-Jan-2004	cl	logging/debugging changes: - add PTHREAD_PID_DEBUG which prints the pid before each debuglog line - output thread returned in pthread__next - add asserts in pthread__sched akin to asserts in pthread__sched_bulk: check if scheduled thread is at front/end of queue - pthread__upcall: output event/interrupted LWP count instead of LWPid of the first event/interrupted LWP (since unblock upcalls can have multiple event LWPs). - pthread__find_interrupted: output LWPid here
1.6	04-Jul-2003	skrll	Typos in comments.
1.5	15-Feb-2003	nathanw	Move module-specific debugging definitions here.
1.4	27-Jan-2003	nathanw	Add debug counters for mutex and condvar operations.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Jan-2003	nathanw	branches: 1.1.2; file pthread_debug.h was initially added on branch nathanw_sa.
1.1.2.2	13-Jan-2003	nathanw	Textual names for event counters.
1.1.2.1	13-Jan-2003	nathanw	Move debug-only stuff into its own header.
1.8.18.1	25-Sep-2007	wrstuden	In preparation for sending ourselves upcalls, keep track of them (give them a counter) and don't consider receiving one of them an error.
1.8.16.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.9.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.9.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.10.2.2	01-Aug-2007	ad	Remove unused counters.
1.10.2.1	01-Aug-2007	ad	file pthread_debug.h was added on branch matt-mips64 on 2007-08-01 21:48:20 +0000
1.11.2.2	09-Jan-2008	matt	sync with HEAD
1.11.2.1	06-Nov-2007	matt	sync with HEAD
1.4	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_detach.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.4	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_equal.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.5	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.4	02-May-2008	martin	branches: 1.4.8; Move TNF licenses to 2 clause form
1.3	04-Jul-2003	wiz	branches: 1.3.32; New sentence, new line.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.32.1	18-May-2008	yamt	sync with head.
1.4.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.4.8.1	02-May-2008	martin	file pthread_exit.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.5	05-Mar-2017	njoly	Fix man page ERRORS section for (clock,pthread}_getcpuclockid to match reality.
1.4	04-Mar-2017	njoly	Fix {clock,pthread}_getcpuclockid to return an error number on failure, to match OpenGroup specifications.
1.3	24-Apr-2016	wiz	branches: 1.3.2; 1.3.4; Formatting, typos, whitespace fixes.
1.2	24-Apr-2016	christos	commit the right file.
1.1	23-Apr-2016	christos	Add pthread_getcpuclockid(3)
1.3.4.1	21-Apr-2017	bouyer	Sync with HEAD
1.3.2.1	20-Mar-2017	pgoyette	Sync with HEAD
1.4	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.3	29-Jan-2020	kamil	Chack thread->pt_magic with PT_MAGIC promptly Rearrange some checks to avoid verifying pthread_t after using it.
1.2	04-Mar-2017	njoly	branches: 1.2.12; Fix {clock,pthread}_getcpuclockid to return an error number on failure, to match OpenGroup specifications.
1.1	23-Apr-2016	christos	branches: 1.1.2; 1.1.4; Add pthread_getcpuclockid(3)
1.1.4.1	21-Apr-2017	bouyer	Sync with HEAD
1.1.2.1	20-Mar-2017	pgoyette	Sync with HEAD
1.2.12.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.5	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.4	09-Jul-2010	jruoho	Rationalize by moving pthread_attr_setname_np(3) to pthread_attr_getname_np(3); and pthread_setname_np(3) to pthread_getname_np(3).
1.3	07-Jul-2010	wiz	Sort sections.
1.2	06-Jul-2010	jruoho	Fix LIBRARY. Add ERRORS and COMPATIBILITY. And some small improvements.
1.1	14-Dec-2007	yamt	branches: 1.1.2; document following functions. pthread_attr_getname_np pthread_attr_setname_np pthread_getname_np pthread_setname_np
1.1.2.2	09-Jan-2008	matt	sync with HEAD
1.1.2.1	14-Dec-2007	matt	file pthread_getname_np.3 was added on branch matt-armv6 on 2008-01-09 01:36:35 +0000
1.6	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.5	09-Jul-2010	wiz	Mark up NULL, remove double space.
1.4	09-Jul-2010	jruoho	Rationalize by moving pthread_key_delete(3) to pthread_key_create(3); and pthread_setspecific(3) to pthread_getspecific(3)
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_getspecific.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.114	02-Apr-2025	riastradh	pthread_cancel(3): Use _Atomic consistently with C11 atomics. Should fix clang build: /home/source/ab/HEAD-llvm/src/lib/libpthread/pthread.c:1264:8: error: address argument to atomic operation must be a pointer to _Atomic type ('volatile unsigned int *' invalid) (atomic_load_relaxed(&self->pt_cancel) & ^ ~~~~~~~~~~~~~~~~ /home/source/ab/HEAD-llvm/src/lib/libpthread/pthread.c:74:2: note: expanded from macro 'atomic_load_relaxed' atomic_load_explicit(p, memory_order_relaxed) ^ ~ /home/builds/ab/HEAD-llvm/amd64/202504020240Z-dest/usr/include/clang-13.0/stdatomic.h:121:30: note: expanded from macro 'atomic_load_explicit' #define atomic_load_explicit __c11_atomic_load PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.113	31-Mar-2025	riastradh	pthread_cancel(3): Rework. Make pthread_setcancelstate(3) async-signal-safe. (As a side effect, this also makes pthread_setcanceltype(3) async-signal-safe, although that is not required.) PR lib/59134: POSIX-1.2024: pthread_setcancelstate must be async-signal-safe
1.112	30-Nov-2024	christos	Create a new header lwp_private.h to contain _lwp_getprivate_fast, _lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that: 1. we don't need special hacks to hide them 2. we can include <lwp.h> where needed to get the necessary prototypes without redefining them locally.
1.111	25-May-2023	riastradh	branches: 1.111.2; libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.110	25-May-2023	riastradh	libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) XXX pullup-10
1.109	19-Apr-2022	rillig	branches: 1.109.2; lib: remove CONSTCOND comment Since 2021-01-31, lint doesn't need it anymore for the common pattern of 'do ... while (0)'.
1.108	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.107	10-Jun-2020	ad	- Make pthread_condvar and pthread_mutex work on the stack rather than in pthread_t, so there's less chance of bad things happening if someone calls (for example) pthread_cond_broadcast() from a signal handler. - Remove all the deferred waiter handling except for the one case that really matters which is transferring waiters from condvar -> mutex on wakeup, and do that by splicing the condvar's waiters onto the mutex. - Remove the mutex waiters bit as it's another complication that's not strictly needed.
1.106	02-Jun-2020	joerg	Pass down errno when calling pthread__errorfunc after a system call. Allow format arguments for that reason and use (v)snprintf_ss in pthread_errorfunc to avoid race conditions and the like.
1.105	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.104	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.103	16-Feb-2020	kamil	Revert "Enhance the pthread(3) + malloc(3) init model" It is reported to hand on aarch64 with gzip.
1.102	15-Feb-2020	kamil	Enhance the pthread(3) + malloc(3) init model Separate the pthread_atfork(3) call from pthread_tsd_init() and move it into a distinct function. Call inside pthread__init() late TSD initialization route, just after "pthread_atfork(NULL, NULL, pthread__fork_callback);". Document that malloc(3) initialization is now controlled again and called during the first pthread_atfork(3) call. Remove #if 0 code from pthread_mutex.c as we no longer initialize malloc prematurely.
1.101	05-Feb-2020	kamil	Retire ifdef ERRORCHECK in pthread(3) It is enabled unconditionally since 2003 and used only for rwlocks and spinlocks. LLVM sanitizers make assumptions that these checks are enabled always.
1.100	28-Jan-2020	ad	- A bit more alignment in __pthread_st especially for the rbtree node. - Use COHERENCY_UNIT from sys/param.h.
1.99	27-Jan-2020	ad	pthread_detach(), pthread_join(): go back to using _lwp_detach() and _lwp_wait(), rather than doing it all in userspace. There's less to go wrong. Doesn't seem to be a performance penalty.
1.98	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.97	18-Dec-2019	joerg	Bump PTHREAD__UNPARK_MAX to 128 as bandaid for locking related hangs.
1.96	16-Dec-2019	uwe	G/c unused rwlock owner macros copy-pasted from the kernel. They were brought along with the rwlock flags but never used and never even adapted to the new home (the struct member name is different here). I looked at adapting and using them, but they don't really help readability that much and there are cases where we need to deal with "fused" owner values anyway and so can't use them.
1.95	05-Mar-2019	christos	branches: 1.95.2; Transfer all the keys that were created in the libc stub implementation to the pthread tsd implementation when the main thread is created. This corrects a problem where a process created keys before libpthread was loaded (either from the libc constructor or because libpthread was dlopened later). This fixes a problem with jemalloc which creates keys in the constructor.
1.94	02-Jul-2017	joerg	branches: 1.94.6; Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.93	08-Feb-2017	kamil	branches: 1.93.4; libpthread_dbg(3) deletion from the base distribution libpthread_dbg(3) is a remnant library from the M:N thread model (pre-NetBSD-5.0) API to introspect threads within a process and for use of debuggers. Currently in the 1:1 model it's not used in GDB neither in LLDB and it's not either planned to be used. It's current function to read pthread_t structures is realizable within a regular debugger capable to instrospect objects within a tracee (GDB, LLDB...). Remaining users of this API can still use this library from pkgsrc/devel/libpthread_dbg. Sponsored by <The NetBSD Foundation>
1.92	29-May-2015	christos	branches: 1.92.2; 1.92.4; Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly.
1.91	29-May-2015	manu	Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256.
1.90	16-Dec-2014	pooka	Allow for arbitrary MI scheduler implementations. A concrete result is enabling unpatched libpthread to run on the rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler. Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall interfaces (well, "syscall" interfaces in that scenario ;) More specifically about the change itself: 1) instead of calling _lwp_makecontext() followed by _lwp_create() and passing the entry point in ucontext_t (MD) through the calls, roll the calls into pthread__makelwp() and allow alternate implementations for that MI interface. 2) allow compile-time overriding of __lwp_gettcb_fast() or __lwp_getprivate_fast, which are inline and leak MD scheduler/thread details into libpthread Additionally, two small nits: I) define LIB=pthread before including mk.conf so that it's possible to test for LIB==pthread in mk.conf II) make it possible to leave out pthread_cancelstub.c. This is required by the current implementation of rumprun-posix (i.e. rumprun on POSIX hosts) due to symbol collisions. It needs to be fixed properly some day, but for now allows an almost-correct libpthread to run. I am sure @justin will be happy to explain the details ;) no change to NetBSD tested: anita+atf
1.89	21-Mar-2013	christos	branches: 1.89.8; - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.88	21-Nov-2012	christos	Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads.
1.87	03-Nov-2012	rmind	libpthread: replace the use of obsolete sys/tree.h interface with rbtree(9).
1.86	16-Aug-2012	matt	branches: 1.86.2; Add a pthread__smt_wake and add support for it on arm along with pthread__smt_pause. These are implemented using the ARM instructions SEV (wake) and WFE (pause). These are treated as NOPs on ARM CPUs that don't support them.
1.85	04-May-2012	joerg	Simplify check for TLS definition to not hide code. Drop it in another place as it is redundant.
1.84	12-Mar-2012	joerg	Keep track of the size of the guard area, in case we want to make it modifiable later. Only reuse the stack if it was allocated by libpthread and if the expected thread size matches the current stack size.
1.83	02-Mar-2012	joerg	Separate pthread_t from thread stack. Drop additional alignment restrictions on the thread stack. Remove remaining parts of stackid.
1.82	17-Jan-2012	joerg	branches: 1.82.2; Introduce __HAVE_NO___THREAD for sun2 and vax to disable the TLS usage. Require __HAVE_TLS_VARIANT_I or __HAVE_TLS_VARIANT_II as well as __lwp_getprivate_fast / __lwp_gettcb_fast to exist for libpthread. Define VAX as going to use TLS variant I, if it is ever implemented.
1.81	06-Oct-2011	christos	branches: 1.81.2; Include limits.h to get PTHREAD_KEYS_MAX, and move its definition there.
1.80	16-Sep-2011	joerg	Use __dead
1.79	05-Aug-2011	lukem	fix spello in comment
1.78	17-Mar-2011	matt	Add __HAVE___LWP_GETTCB_FAST support (for mips and powerpc).
1.77	16-Mar-2011	joerg	If TLS support is present, use it for pthread__self(). The initialisation order is correct in this case as _lwp_setprivate has been called already by ld.elf_so for dynamic programs or _libc_init for statically linked ones.
1.76	09-Mar-2011	joerg	Add TLS support infrastructure. For dynamic binaries, ld.elf_so exports _rtld_tls_allocate and _rtld_tls_free. libpthread uses this functions to setup the thread private area of all new threads. ld.elf_so is responsible for setting up the private area for the initial thread. Similar functions are called from _libc_init for static binaries, using dl_iterate_phdr to access the ELF Program Header. Add test cases to exercise the different TLS storage models. Test cases are compiled and installed on all platforms, but are skipped on platforms not marked for TLS support. This material is based upon work partially supported by The NetBSD Foundation under a contract with Joerg Sonnenberger. It is inspired by the TLS support in FreeBSD by Doug Rabson and the clean ups of the DragonFly port of the original FreeBSD modifications.
1.75	25-Feb-2011	joerg	Back out using the thread register (if present) for now. libgcc_s's __register_frame_info gets called from libc's CSU code before the libc constructors are run. __register_frame_info in turn calls pthread_mutex_lock. libpthread is not initialised at this point and therefore pthread__self() traps when deferencing the thread register. This worked before because the garbage from pthread__self() is effectively ignored.
1.74	24-Feb-2011	joerg	Allow storing and receiving the LWP private pointer via ucontext_t on all platforms except VAX and IA64. Add fast access via register for AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace the stack based pthread_self(). Implement skeleton support for Alpha, HPPA, PowerPC, SPARC and SPARC64, but leave it disabled. Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in machine/types.h and a corresponding __lwp_getprivate_fast in machine/mcontext.h. This material is based upon work partially supported by The NetBSD Foundation under a contract with Joerg Sonnenberger.
1.73	18-Dec-2010	christos	branches: 1.73.2; I've had this patch in my tree for a while and since it only improves the situation, I decided to commit it. There is an inherent problem with ASLR and the way the pthread library is using the thread stack. Our pthread library chooses that stack for each thread strategically so that it can locate the location of the pthread struct for each thread by masking the stack pointer and looking just below the red zone it creates. Unfortunately with ASLR you get many random values for the initial stack, and there are situations where the masked stack base ends up below the base of the stack. (this happens on x86 when the stack base happens to be 0x???02000 for example and your mask is stackmask is 0xffe00000). To fix this, we detect the pathological cases (this happens only in the main thread), allocate more stack, and mprotect it appropriately. Then we stash the main base and the main struct, so that when we look for the pthread struct in pthread__id, we can special case the main thread. Another way to work around the problem is unlimiting stacksize, but the proper way is to use TLS to find the thread structure and not to play games with the thread stacks.
1.72	17-May-2009	ad	- Convert from makecontext() -> _lwp_makecontext(). - Rely on _lwp_makecontext() to set up the thread identity register. This is not currently done (a bug), nor does libpthread use the threadreg yet. I'm doing this so it the code can be used by the person working on TLS to verify that their threadreg code is working.
1.71	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.70	28-Jun-2008	ad	branches: 1.70.6; Now that we have all the scheduling gunk, make these do something useful: pthread_attr_get_np pthread_attr_setschedparam pthread_attr_getschedparam pthread_attr_setschedpolicy pthread_attr_getschedpolicy
1.69	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.68	28-Apr-2008	martin	branches: 1.68.2; Remove clause 3 and 4 from TNF licenses
1.67	14-Feb-2008	ad	branches: 1.67.4; Adjust mutex/rwlock definitions to match reality now that there is only one implementation of each. PR lib/38030.
1.66	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.65	08-Jan-2008	christos	add missing static decls.
1.64	24-Dec-2007	ad	- Use pthread__cancelled() in more places. - pthread_join(): assert that pthread_cond_wait() returns zero.
1.63	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.62	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.61	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.60	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.59	16-Oct-2007	ad	Note that libpthread_dbg needs to be checked after making changes to libpthread.
1.58	16-Oct-2007	ad	... but preserve the linked list, for the debugger only.
1.57	16-Oct-2007	ad	Replace the global thread list with a red-black tree. From joerg@.
1.56	24-Sep-2007	skrll	Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.55	13-Sep-2007	ad	Add a per-mutex deferred wakeup flag so that threads doing something like the following do not wake other threads early: pthread_mutex_lock(&mutex); pthread_cond_broadcast(&cond); foo = malloc(100); /* takes libc mutexes */ pthread_mutex_unlock(&mutex);
1.54	11-Sep-2007	ad	Make the new mutexes faster: - Eliminate mutexattr_private and just set a bit in ptm_owner if the mutex is recursive. This forces the slow path to be taken for recursive mutexes. Overload an unused field in pthread_mutex_t to record whether or not it's an errorcheck mutex. - Streamline pthread_mutex_lock / pthread_mutex_unlock a bit more. As a side effect makes it possible to have assembly stubs for them.
1.53	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.52	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.51	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.50	07-Sep-2007	ad	Add: pthread__atomic_cas_ptr, pthread__atomic_swap_ptr, pthread__membar_full This is a stopgap until the thorpej-atomic branch is complete.
1.49	16-Aug-2007	ad	branches: 1.49.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.48	16-Aug-2007	ad	- Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.47	16-Aug-2007	ad	Remove PT_FIXEDSTACKSIZE_LG.
1.46	16-Aug-2007	ad	Cache thread context for creation instead of setting it up every time. Speeds create/join loop by about 10-15% on i386.
1.45	07-Aug-2007	ad	Change the signature of _lwp_park() to accept an lwpid_t and second hint pointer, but do so in a way that remains compatible with older pthread libraries. This can be used to wake another thread before the calling thread goes asleep, saving at least one syscall + involuntary context switch. This turns out to be a fairly large win on the condvar benchmarks that I have tried.
1.44	04-Aug-2007	ad	branches: 1.44.2; Make libpthread_dbg build again.
1.43	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.42	12-Apr-2007	ad	branches: 1.42.2; Mirror a fix made to the kernel's condvars: After resuming execution, the thread must check to see if it has been restarted as a result of pthread_cond_signal(). If it has, but cannot take the wakeup (because of eg a pending Unix signal or timeout) then try to ensure that another thread sees it. This is necessary because there may be multiple waiters, and at least one should take the wakeup if possible.
1.41	24-Mar-2007	ad	- Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.40	20-Mar-2007	ad	- Maintain a per-thread pointer to the last mutex acquired by the app, to be used only as as a hint. Clear the pointer when releasing the mutex. - When releasing a mutex, wake all waiters. Makes it possible to tranfer waiters from another object to a mutex.
1.39	05-Mar-2007	ad	- Simplify the interface to pthread__park() and friends slightly. - If sysctl() fails, complain.
1.38	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.37	06-Feb-2007	ad	Build without sys/sa.h present.
1.36	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.35	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.34	03-Oct-2006	yamt	branches: 1.34.2; 1.34.4; remove unused IDLESPINS.
1.33	19-Oct-2005	chs	starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. I also noticed that there's a "sem2" test that has never worked in its single-threaded form. the problem there is that a signal handler tries to take a sem_t interlock which is already held when the signal is received. fix this too, by adding a single-threaded case for sig_trywait() that blocks signals instead of using the userland interlock.
1.32	16-Oct-2005	chs	in pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. fixes PR 20256, PR 24241, PR 25722, PR 26096.
1.31	26-Feb-2005	nathanw	Keep the kernel updated with signal action signal masks (act.sa_mask) until threads are started, since before that the traditional signal invocation method will be used. Fixes regress/lib/libpthread/sigmask2.
1.30	12-Oct-2004	mycroft	Remove pt_blockuc. If the debugger attempts to muck with the state of a blocked thread, return an error; this should be done through ptrace(2).
1.29	24-Aug-2004	nathanw	Local whitespace police.
1.28	24-Aug-2004	nathanw	Add a flag that indicates that a thread took a signal.
1.27	25-Jun-2004	drochner	const'ify the arguments to pthread__assertfunc and _errorfunc; needed because the __func__ pseudo-var is strictly "const*" in gcc-3.4
1.26	14-Mar-2004	cl	add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.25	02-Feb-2004	nathanw	Rename pt_stacksize, pt_stacksize_lg, and pt_stackmask to pthread_*. External symbols can't start with pt_, as that is in the application namespace.
1.24	02-Jan-2004	cl	userland part of no-syscall upcall stack return - add pt_stackinfo to struct __pthread_st - add pthread__stackinfo_offset returning the offset from ss_sp to pt_stackinfo - pass stackinfo_offset to sa_register and set SA_FLAG_STACKINFO to make the kernel use it - call pthread__sa_recycle in pthread__resolve_locks; g/c recycleq and pthread__recycle_bulk - return stack in pthread__sa_recycle by incrementing sasi_stackgen - make pthread__sa_recycle debugging output formatting conditional on pthread__debug_newline
1.23	31-Dec-2003	cl	Handle block/unblock for threads in critical section without sa_unblockyield. XXX g/c sa_unblockyield in kernel later
1.22	27-Nov-2003	cl	Set default stack size to the current limit on the stack size as set with the shell's command to change limits. Make the PTHREAD_STACKSIZE environment variable override the default stack size. The old fixed stack size behaviour can be enable with PT_FIXEDSTACKSIZE_LG when building libpthread.
1.21	25-Nov-2003	christos	GC sigcontext<->mcontext code and __HAVE_SIGINFO. All supported archs have siginfo implemented.
1.20	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.19	12-Sep-2003	christos	convert to use siginfo/ucontext style of signal delivery instead of sigcontext. Approved by nathanw.
1.18	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.17	21-Jul-2003	nathanw	Add a lock on the pt_flags field.
1.16	18-Jul-2003	nathanw	pthread.c was getting a bit unwieldly. Move pthread_attr stuff out into a new file, and put the shared private structure definition in pthread_int.h.
1.15	17-Jul-2003	nathanw	Adapt to internal structure name changes. Add a couple of useful flags and symbols.
1.14	26-Jun-2003	nathanw	Introduce a new pointer, pt_trapuc, that stores thread context captured by the kernel. Separating this from pt_uc makes it possible to avoid a race condition in pt_uc management near the STACK_SWITCH part of pthread__switch() and pthread__locked_switch(). Remove pt_sleepuc pointer, which was made obsolete by the previous round of UC juggling but still present in the assembler files.
1.13	06-Jun-2003	nathanw	Tiny bit of infrastructure for ABI-supported thread-ID storage.
1.12	27-May-2003	christos	pass lint: 1. add new pthread__abort() and change pthread_assert(0) to it. 2. put constcond in the right place (in the macro). 3. no space after pthread__assert macro.
1.11	23-Apr-2003	nathanw	Introduce a pthread__error() macro, for detected application errors as opposed to internal errors. The setting of the PTHREAD_ERRORMODE environment variable determines the runtime behavior. Valid settings are "ignore", "abort", and "print". The default is currently "abort".
1.10	18-Apr-2003	nathanw	Use a __predict_true() in the definition of pthread__assert().
1.9	26-Feb-2003	thorpej	Add support for naming a thread, using an API compatible with Tru64 Unix: * pthread_attr_getname_np() * pthread_attr_setname_np() * pthread_getname_np() * pthread_setname_np() In addition to being query'able by the application (for log messages, etc.), it is intended that these names can show up in the debugger. Reviewed by nathanw.
1.8	15-Feb-2003	jdolecek	interposition sigtimedwait() with a thread-aware version, which uses single proxy thread to do the actual syscall, and blocks other threads in userland
1.7	15-Feb-2003	nathanw	Define a pthread-specific assert function, pthread__assert(), that bails out without trying to flush stdio buffers.
1.6	04-Feb-2003	jdolecek	minor whitespace changes
1.5	31-Jan-2003	nathanw	Add a new internal function, pthread__sched_sleepers(), which iterates over a sleep queue and puts everything on the run queue. This permits the iteration to be inside the acquisition of the run queue spinlock, avoiding repetitive acquire/release cycles.
1.4	25-Jan-2003	nathanw	More signal rearranging: - Signal handlers now simply continue executing the current thread, rather than trying to put themselves back on the queue that they came from, which was rather fragile. As a result, all callers of pthread__block() must be prepared to handle spurious wakeups. - When a signal arrives for a thread that is blocked in the kernel, note this in another field in pthread_st and set a flag. Process the signal and set up the trampoline for the handler after the thread unblocks, so that both the trampoline and the returned state from the kernel are preserved. - Factor out some code into a pthread__deliver_signal() routine; the signal-taking code in pthread_sigmask() should be able to use this soon. This is still gross, and there are still some terrible MP issues lurking here, but progress crawls along.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_int.h was initially added on branch nathanw_sa.
1.1.2.41	16-Jan-2003	thorpej	Back out previous, and fix the problem by only providing the ucontext prototypes if the names are not already #define'd.
1.1.2.40	16-Jan-2003	skrll	Put the #include "pthread_md.h" back where it was so the #define stuff in i386/pthread_md.h works again.
1.1.2.39	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.38	13-Jan-2003	nathanw	Move debug-only stuff into its own header.
1.1.2.37	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.36	16-Dec-2002	nathanw	Add a lock to the alarm structure, and adjust the alarm__fired() function to take a properly typed pointer.
1.1.2.35	03-Nov-2002	skrll	Whitespace.
1.1.2.34	28-Oct-2002	nathanw	As pointed out recently on comp.programming.threads, POSIX requires that pthread_detach() and pthread_join() must return ESRCH, not invoke undefined behavior, even if handed completely nonsensical pthread_t values. So, search through the list of threads to see if the pthread_t value is valid.
1.1.2.33	28-Oct-2002	nathanw	Compact timer magic slightly.
1.1.2.32	22-Oct-2002	nathanw	Define a new macro _INITCONTEXT_U() which initializes a ucontext_t to "blank" values cheaply. Include _INITCONTEXT_U_MD() for setting machine-specific registers that must be set to have a valid context.
1.1.2.31	21-Oct-2002	nathanw	Implement a somewhat crude forced round-robin scheduling option, enabled by setting PTHREAD_RRTIME to the number of milliseconds between timer events. Makes use of CLOCK_VIRTUAL POSIX timers.
1.1.2.30	02-Oct-2002	thorpej	Fix a typo in a comment.
1.1.2.29	14-Aug-2002	nathanw	Infrastructure for machine-dependent init code.
1.1.2.28	12-Aug-2002	nathanw	Move inclusion of pthread_md.h down to just where it's needed.
1.1.2.27	02-Aug-2002	nathanw	Add a flag indicating that the thread should be woken up on a signal.
1.1.2.26	16-Jul-2002	nathanw	Make the caller of the alarm functions supply the alarm data structure, instead of malloc'ing() it. "malloc() inside spinlocks considered harmful." Duh.
1.1.2.25	20-May-2002	nathanw	Increase the thread stack size from 64k to 256k. This is necessary for some stack-hogging apps like Apache, and for systems with page sizes larger than 16k.
1.1.2.24	20-May-2002	nathanw	Many signal improvements: - Implement sigsuspend() - Take pending signals that are unblocked in pthread_sigmask(). - Tweak the signal mask passed by sigaction() to permit us to manage our own thread-specific signal masks. - Don't try to deliver signals to zombie threads. - Prevent a race between deciding a thread can take a signal and actually taking it. - Don't put threads that are blocked in a syscall on the run queue. - Add debug logging.
1.1.2.23	26-Apr-2002	nathanw	Track the object being slept on.
1.1.2.22	24-Apr-2002	nathanw	Add a numeric ID to the pthread structure. Add a "Running" state, distinct from "Runnable".
1.1.2.21	07-Mar-2002	nathanw	Oops. It's slightly less confusing if PT_ALARMTIMER_MAGIC and _PT_MUTEX_MAGIC have different values.
1.1.2.20	01-Mar-2002	nathanw	Declare POSIX spinlock interfaces: pthread_spin_*() and pthread_spinlock_t. Move the internal spinlock interface declarations back to the internal header.
1.1.2.19	19-Feb-2002	nathanw	Move alarm initialization into pthread_alarms.c.
1.1.2.18	28-Jan-2002	nathanw	Cancellation support. This includes implementing pthread_cancel() and pthread_testcancel(), making pthread_join() and pthread_cond_wait() cancellation points, introducing new states to distinguish waiting on a sleep queue from waiting in the kernel, and introducing a locking protocol around changing a thread's run state.
1.1.2.17	30-Dec-2001	nathanw	Rename pt_spin_t to pthread_spin_t for namespace cleanliness. Define cleanup data structures: cleanup queue, cancel state.
1.1.2.16	04-Sep-2001	nathanw	Define a "_UC_USER" flag to b eused in ucontext.uc_flags to indicate that only "user" (callee-save) state is stored.
1.1.2.15	08-Aug-2001	nathanw	pthread_malloc() and pthread_free() are superfluous.
1.1.2.14	08-Aug-2001	nathanw	Add thread-specific data area to thread structure. Declare pthread_init() startup function. Declare pthread__destroy_tsd() utility function. Move spinlock functions to pthread.h.
1.1.2.13	01-Aug-2001	nathanw	Oops, that's old_preempt, not new_preempt.
1.1.2.12	01-Aug-2001	nathanw	Add a field to the pthread structure to hold the "real" ucontext pointer for threads preempted in the early stage of locked_switch.
1.1.2.11	31-Jul-2001	nathanw	Prototype "force" argument to pthread__debuglog_init().
1.1.2.10	26-Jul-2001	nathanw	pthread__switch() no longer needs to be implemeted in assembler, and doesn't have a lock parameter.
1.1.2.9	25-Jul-2001	nathanw	Enable ERRORCHECK. Standardize MAGIC/DEAD values.
1.1.2.8	24-Jul-2001	nathanw	Some whitespace cleanup.
1.1.2.7	20-Jul-2001	nathanw	The _*context_u functions are now in the pthread library.
1.1.2.6	17-Jul-2001	nathanw	Add a mechanisim for debugging that is less likely to change scheduling behaviour than using printf (writing to a shared memory segment), and a simple tool for dumping the buffer. Partly inspired by the kernel msgbuf code.
1.1.2.5	17-Jul-2001	nathanw	Create more idle threads. In the current system, we need one for every level of preemption nesting.
1.1.2.4	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.3	13-Jul-2001	nathanw	Shrink the per-thread stack to a more reasonable size.
1.1.2.2	13-Jul-2001	nathanw	Use the new queue type and type headers. Prototype pthread_lockinit(). A little whitespace cleanup.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.34.4.5	04-Jan-2008	wrstuden	Fix comment.
1.34.4.4	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.34.4.3	19-Oct-2007	wrstuden	Work on cleaning up lock ordering. Turns out that there's not too much to do, other than fixing an issue in join and one I introduced. Add volumous comment in pthread_int.h describing how I understand the current locking to work. pthread_join() considered pt_flaglock to be a higher-priority lock than pt_join_lock. Life makes more sense if we flip that. To not make a lot of routines messy, pthread__runqueue_lock has to be lower in the lock ordering than pt_statelock. Adapt the changes I made to sched_yield() to this ordering. There still is a wart regarding setting the state of a thread we are taking off of the run (or idle) queue. We can't lock its pt_statelock as we have the runqueue lock held. For now, go back to what the old code did which was just write over the info. This isn't that bad as the only things that should be changing the state of this thread should be run-queue savy. I need to check this though....
1.34.4.2	25-Sep-2007	wrstuden	Rename pt_blockedlwp to pt_lastlwp, and set it whenever we switch to a new pthread. This way we always know on what lwp a given thread is running.
1.34.4.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.34.2.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.42.2.3	10-Sep-2007	skrll	Sync with HEAD.
1.42.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.42.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.44.2.2	04-Aug-2007	ad	Make libpthread_dbg build again.
1.44.2.1	04-Aug-2007	ad	file pthread_int.h was added on branch matt-mips64 on 2007-08-04 18:54:14 +0000
1.49.2.3	23-Mar-2008	matt	sync with HEAD
1.49.2.2	09-Jan-2008	matt	sync with HEAD
1.49.2.1	06-Nov-2007	matt	sync with HEAD
1.67.4.2	04-Jun-2008	yamt	sync with head
1.67.4.1	18-May-2008	yamt	sync with head.
1.68.2.2	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.68.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.70.6.2	28-Jun-2008	ad	Now that we have all the scheduling gunk, make these do something useful: pthread_attr_get_np pthread_attr_setschedparam pthread_attr_getschedparam pthread_attr_setschedpolicy pthread_attr_getschedpolicy
1.70.6.1	28-Jun-2008	ad	file pthread_int.h was added on branch christos-time_t on 2008-06-28 10:29:38 +0000
1.73.2.1	05-Mar-2011	bouyer	Sync with HEAD
1.81.2.5	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.81.2.4	16-Jan-2013	yamt	sync with (a bit old) head
1.81.2.3	30-Oct-2012	yamt	sync with head
1.81.2.2	23-May-2012	yamt	sync with head.
1.81.2.1	17-Apr-2012	yamt	sync with head
1.82.2.3	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.82.2.2	02-Dec-2012	riz	Back out ticket #724 (libpthread changes) until they can be better understood, as they broke threaded programs on (at least) i386 and amd64.
1.82.2.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #724): lib/libpthread/pthread_specific.c: revision 1.24 lib/libpthread/pthread_tsd.c: revision 1.10 lib/libpthread/pthread_tsd.c: revision 1.9 lib/libpthread/pthread_int.h: revision 1.88 Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads. Don't call the destructor in pthread_key_delete() following the standard.
1.86.2.3	23-Jun-2013	tls	resync from head
1.86.2.2	25-Feb-2013	tls	resync with head
1.86.2.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.89.8.1	24-Nov-2015	martin	Pull up following revision(s) (requested by manu in ticket #829): lib/libpthread_dbg/pthread_dbg.c: revision 1.43 (via patch) lib/libpthread/pthread_int.h: revision 1.91-1.92 (via patch) lib/libc/stdlib/jemalloc.c: revision 1.37-1.38 lib/libpthread/pthread_tsd.c: revision 1.12-1.14 (via patch) include/limits.h: revision 1.34 (via patch) lib/libpthread/pthread.c: revision 1.146-1.147 (via patch) lib/libpthread/pthread_key_create.3: revision 1.7 (via patch) libpthread: Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256. Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly. Thanks rump for not letting us use even mmap during initialization. libc/jemalloc: Fix non _REENTRANT build. Defer using pthread keys until we are threaded. From Christos, fixes PR port-arm/50087 by allowing malloc calls prior to libpthread initialization.
1.92.4.1	21-Apr-2017	bouyer	Sync with HEAD
1.92.2.1	20-Mar-2017	pgoyette	Sync with HEAD
1.93.4.2	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.93.4.1	31-Aug-2017	bouyer	Pull up following revision(s) (requested by joerg in ticket #234): sys/arch/amd64/include/vmparam.h: revision 1.43 sys/kern/exec_subr.c: revision 1.79 lib/libpthread/pthread_int.h: revision 1.94 sys/arch/mips/include/vmparam.h: revision 1.58 sys/arch/mips/include/vmparam.h: revision 1.59 lib/libpthread/TODO: revision 1.19 sys/arch/powerpc/include/vmparam.h: revision 1.20 sys/arch/riscv/include/vmparam.h: revision 1.2 sys/arch/riscv/include/vmparam.h: revision 1.3 sys/arch/i386/include/vmparam.h: revision 1.85 tests/lib/libpthread/t_join.c: revision 1.9 sys/uvm/uvm_meter.c: revision 1.66 sys/uvm/uvm_param.h: revision 1.36 sys/kern/exec_subr.c: revision 1.80 sys/uvm/uvm_param.h: revision 1.37 sys/kern/exec_subr.c: revision 1.81 sys/kern/exec_subr.c: revision 1.82 lib/libpthread/pthread_attr_getguardsize.3: revision 1.4 lib/libpthread/pthread.c: revision 1.148 lib/libpthread/pthread_attr.c: revision 1.17 sys/arch/amd64/include/vmparam.h: revision 1.42 Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Revert for the moment, creates problems on i386. Recommit exec_subr.c revision 1.79: Always include a 1MB guard area beyond the end of stack. While ASLR will normally create a guard area as well, this provides a deterministic area for all binaries. Mitigates the rest of CVE-2017-1000374 and CVE-2017-1000375 from Qualys. Additionally, change VM_DEFAULT_ADDRESS_TOPDOWN to include user_stack_guard_size in the size reservation. Update VM_DEFAULT_ADDRESS32_TOPDOWN to include guard area. Export the guard size of the main thread via vm.guard_size. Add a complementary writable sysctl for the initial guard size of threads created via pthread_create. Let the existing attribut accessors do the right thing. Raise the default guard size for threads to 64KB.
1.94.6.2	08-Apr-2020	martin	Merge changes from current as of 20200406
1.94.6.1	10-Jun-2019	christos	Sync with HEAD
1.95.2.3	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.95.2.2	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.95.2.1	18-Dec-2019	martin	Pull up following revision(s) (requested by joerg in ticket #571): lib/libpthread/pthread_int.h: revision 1.97 Bump PTHREAD__UNPARK_MAX to 128 as bandaid for locking related hangs.
1.109.2.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.111.2.1	02-Aug-2025	perseant	Sync with HEAD
1.6	09-Jul-2010	wiz	Mark up NULL.
1.5	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.4	02-May-2008	martin	branches: 1.4.8; Move TNF licenses to 2 clause form
1.3	04-Jul-2003	wiz	branches: 1.3.32; Mark up a defined value.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.32.1	18-May-2008	yamt	sync with head.
1.4.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.4.8.1	02-May-2008	martin	file pthread_join.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.9	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.8	29-May-2015	wiz	Bump date for previous. New sentence, new line.
1.7	29-May-2015	manu	Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256.
1.6	09-Jul-2010	wiz	branches: 1.6.24; Mark up NULL.
1.5	09-Jul-2010	jruoho	Rationalize by moving pthread_key_delete(3) to pthread_key_create(3); and pthread_setspecific(3) to pthread_getspecific(3)
1.4	02-May-2008	martin	branches: 1.4.8; Move TNF licenses to 2 clause form
1.3	04-Jul-2003	wiz	branches: 1.3.32; Mark up a defined value.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.32.1	18-May-2008	yamt	sync with head.
1.4.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.4.8.1	02-May-2008	martin	file pthread_key_create.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.6.24.1	24-Nov-2015	martin	Pull up following revision(s) (requested by manu in ticket #829): lib/libpthread_dbg/pthread_dbg.c: revision 1.43 (via patch) lib/libpthread/pthread_int.h: revision 1.91-1.92 (via patch) lib/libc/stdlib/jemalloc.c: revision 1.37-1.38 lib/libpthread/pthread_tsd.c: revision 1.12-1.14 (via patch) include/limits.h: revision 1.34 (via patch) lib/libpthread/pthread.c: revision 1.146-1.147 (via patch) lib/libpthread/pthread_key_create.3: revision 1.7 (via patch) libpthread: Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256. Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly. Thanks rump for not letting us use even mmap during initialization. libc/jemalloc: Fix non _REENTRANT build. Defer using pthread keys until we are threaded. From Christos, fixes PR port-arm/50087 by allowing malloc calls prior to libpthread initialization.
1.7	09-Jul-2010	jruoho	Rationalize by moving pthread_key_delete(3) to pthread_key_create(3); and pthread_setspecific(3) to pthread_getspecific(3)
1.6	02-May-2008	martin	branches: 1.6.8; Move TNF licenses to 2 clause form
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	04-Jul-2003	wiz	Sort sections.
1.3	04-Jul-2003	wiz	.Pp fixes.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.6.8.1	02-May-2008	martin	file pthread_key_delete.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.9	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.8	26-May-2008	wiz	branches: 1.8.6; Sort ERRORS.
1.7	04-May-2008	martin	branches: 1.7.2; Move TNF licenses to 2 clause form
1.6	30-Oct-2003	wiz	branches: 1.6.32; sigwait(2), not (3).
1.5	30-Oct-2003	jdolecek	bump date too
1.4	30-Oct-2003	jdolecek	xref sigwait(3)
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.6.32.2	04-Jun-2008	yamt	sync with head
1.6.32.1	18-May-2008	yamt	sync with head.
1.7.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.8.6.2	26-May-2008	wiz	Sort ERRORS.
1.8.6.1	26-May-2008	wiz	file pthread_kill.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.1	11-Apr-2002	nathanw	branches: 1.1.2; file pthread_libcstubs.c was initially added on branch nathanw_sa.
1.1.2.2	02-May-2002	nathanw	Different way of integrating with libc: Create a vector type for pthread operations; libc will have a pointer to such a vector. When the pthread library is loaded, set libc's pointer to a vector of real operations. This removes the reliance on weak symbol magic, which didn't work for static binaries, and as an aesthetic side effect, we don't have to export a bunch of ugly _libc_pthread_* wrappers.
1.1.2.1	11-Apr-2002	nathanw	Add "hard" stubs for libc interface. Weak aliases didn't work so well.
1.36	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.35	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.34	28-Apr-2008	martin	branches: 1.34.8; Remove clause 3 and 4 from TNF licenses
1.33	05-Jan-2008	ad	branches: 1.33.4; machine/lock.h, not sys/lock.h
1.32	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.31	04-Oct-2007	ad	Drop PTHREAD__NSPINS back from 1000 to 64. Setting the waiters bits and preparing to sleep on a mutex are slow in relative terms, so this allows us to recover from short lock holds without blocking, while not wasting too much time on longer holds.
1.30	24-Sep-2007	ad	Kill PTHREAD_SPIN_DEBUG - it's not must use with 1:1.
1.29	24-Sep-2007	skrll	Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.28	17-Sep-2007	skrll	Mostly fix the restartable atomic sequences by reversing the sense of the lock check and test for return value. At least alpha looks broken me and some are sub-optimal. "Looks good to me" from ad.
1.27	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.26	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.25	07-Sep-2007	ad	If a libpthread internal spinlock is held, nanosleep() for a tick instead of yielding. This is a nasty band-aid but with many threads, looping over sched_yield() wastes a huge amount of CPU time. It would be nice to have a way to temporarily disable preemption, but it turns out that's yet another no-brain concept that has been patented and the patent holder seems to be suing people lately. Another alternative is probably to have kernel-assisted spinlocks.
1.24	16-Aug-2007	ad	branches: 1.24.2; Minor correction for debug code and a cosmetic change.
1.23	16-Aug-2007	ad	Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.22	16-Aug-2007	ad	- Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.21	04-Aug-2007	ad	branches: 1.21.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.20	24-Mar-2007	ad	branches: 1.20.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.19	05-Mar-2007	ad	Cosmetic and minor debugging changes.
1.18	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.17	02-Mar-2007	ad	On x86, issue the pause instruction while spinning.
1.16	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.15	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.14	17-Mar-2005	jwise	branches: 1.14.4; 1.14.6; Lint warning police -- don't use `//' for comments in C code.
1.13	06-Jan-2005	mycroft	Add some additional assertions and debugging printf()s.
1.12	14-Mar-2004	he	It appears that <sys/lock.h> requires <sys/types.h>, so include that as well.
1.11	14-Mar-2004	cl	add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.10	03-Mar-2004	thorpej	Use the new RAS_*() macros.
1.9	13-Feb-2004	wiz	Uppercase CPU, plural is CPUs.
1.8	19-Jan-2004	kleink	; may be a comment character in assembly, use \n as a separator instead. This instance spotted by Martin Husemann.
1.7	16-May-2003	scw	Both pthread__lock_ras_start and pthread__lock_ras_end need to be explicitly declared global in the asm() statements for the benefit of SH5 binutils. Otherwise, the assembler/linker (I haven't figured out which) botches the SHmedia bit when generating GOT references for these symbols in the shared version of the library. Ok'd by Nathan.
1.6	08-Mar-2003	lukem	add __RCSID()
1.5	15-Feb-2003	nathanw	Adapt to pthread__assert() and remove local debug toggle.
1.4	22-Jan-2003	scw	pthread__lock_ras_start and pthread__lock_ras_end need to be declared as function pointers, not character arrays, for the benefit of platforms (e.g. SH5) where the two types are quite distinct.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_lock.c was initially added on branch nathanw_sa.
1.1.2.14	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.13	18-Dec-2002	nathanw	Log lock counts in debug messages.
1.1.2.12	14-Nov-2002	nathanw	Use PTHREAD_SPIN_DEBUG here instead of PTHREAD_SA_DEBUG. Add some checks, conditional on PTHREAD_SPIN_DEBUG, that the spinlock count is positive. Bail out manually instead of calling abort(), because abort() will call signal functions, which will try to use spinlocks....
1.1.2.11	03-Nov-2002	skrll	Whitespace.
1.1.2.10	22-Oct-2002	nathanw	Revert 1.1.2.7 (don't switch if we're an upcall) and the assertion in 1.1.2.6 that encountering a locked spinlock is a bug. Since upcalls can hold spinlocks (signal system, recycle lock, alarm queue, condition variable interlocks via alarm queue callbacks) it is possible that an upcall that has itself been preempted will try to acquire a spinlock that is held by another thread in the lock-resolution code. In this case, the proper thing to do is to transfer control via the preempted-while-spinning code, rather than raising an assertion failure. This will permit the other thread to make forward progress in its critical region, after which this upcall will run again and can aquire the spinlock
1.1.2.9	16-Oct-2002	nathanw	Whitespace.
1.1.2.8	01-Mar-2002	nathanw	Implement POSIX spinlock functions.
1.1.2.7	08-Feb-2002	nathanw	Efficency tweak: don't take preemption-jumps out of switch routines if we're an upcall; the handler will just continue us at the same point anyway until we finish our business.
1.1.2.6	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t. Add some debug logging and assertions.
1.1.2.5	26-Jul-2001	nathanw	pthread__switch() no longer needs to be implemeted in assembler, and doesn't have a lock parameter.
1.1.2.4	20-Jul-2001	nathanw	Reduce excessive header inclusion.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Add pthread_lockinit().
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.14.6.1	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.14.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.20.2.4	03-Sep-2007	skrll	Sync with HEAD.
1.20.2.3	15-Aug-2007	skrll	Sync with HEAD.
1.20.2.2	15-Aug-2007	skrll	Simplify the pthread__simple_lock_try RAS.
1.20.2.1	18-Jul-2007	skrll	Initial work on provided correctly aligned __cpu_simple_lock_t for hppa and first attempt at adapting i386 to the changes. More to come.
1.21.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.21.2.1	04-Aug-2007	ad	file pthread_lock.c was added on branch matt-mips64 on 2007-08-04 13:37:50 +0000
1.24.2.2	09-Jan-2008	matt	sync with HEAD
1.24.2.1	06-Nov-2007	matt	sync with HEAD
1.33.4.1	18-May-2008	yamt	sync with head.
1.34.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.34.8.1	28-Apr-2008	martin	file pthread_lock.c was added on branch christos-time_t on 2008-04-28 20:23:02 +0000
1.1	16-Dec-2014	pooka	Allow for arbitrary MI scheduler implementations. A concrete result is enabling unpatched libpthread to run on the rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler. Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall interfaces (well, "syscall" interfaces in that scenario ;) More specifically about the change itself: 1) instead of calling _lwp_makecontext() followed by _lwp_create() and passing the entry point in ucontext_t (MD) through the calls, roll the calls into pthread__makelwp() and allow alternate implementations for that MI interface. 2) allow compile-time overriding of __lwp_gettcb_fast() or __lwp_getprivate_fast, which are inline and leak MD scheduler/thread details into libpthread Additionally, two small nits: I) define LIB=pthread before including mk.conf so that it's possible to test for LIB==pthread in mk.conf II) make it possible to leave out pthread_cancelstub.c. This is required by the current implementation of rumprun-posix (i.e. rumprun on POSIX hosts) due to symbol collisions. It needs to be fixed properly some day, but for now allows an almost-correct libpthread to run. I am sure @justin will be happy to explain the details ;) no change to NetBSD tested: anita+atf
1.3	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.2	17-Dec-2014	pooka	include correct header for "last minute just-in-case defensive addition that's too trivial to check"
1.1	16-Dec-2014	pooka	Allow for arbitrary MI scheduler implementations. A concrete result is enabling unpatched libpthread to run on the rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler. Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall interfaces (well, "syscall" interfaces in that scenario ;) More specifically about the change itself: 1) instead of calling _lwp_makecontext() followed by _lwp_create() and passing the entry point in ucontext_t (MD) through the calls, roll the calls into pthread__makelwp() and allow alternate implementations for that MI interface. 2) allow compile-time overriding of __lwp_gettcb_fast() or __lwp_getprivate_fast, which are inline and leak MD scheduler/thread details into libpthread Additionally, two small nits: I) define LIB=pthread before including mk.conf so that it's possible to test for LIB==pthread in mk.conf II) make it possible to leave out pthread_cancelstub.c. This is required by the current implementation of rumprun-posix (i.e. rumprun on POSIX hosts) due to symbol collisions. It needs to be fixed properly some day, but for now allows an almost-correct libpthread to run. I am sure @justin will be happy to explain the details ;) no change to NetBSD tested: anita+atf
1.3	06-Oct-2025	riastradh	libc: Expose some more pthread stubs. Additionally, provide the option for pthread.h to expose pthread_create so that libc can provide a weak stub for it, if you define _NETBSD_PTHREAD_CREATE_WEAK. This allows libraries to use the functions without linking against libpthread for applications that don't need threads. For example, with OpenSSL's libcrypto, as long as you don't try to raise OSSL_set_max_threads above 0, it won't ever try pthread_create. New pthread.h macros defined: pthread_attr_destroy __libc_thr_attr_destroy pthread_attr_init __libc_thr_attr_init pthread_attr_setdetachstate __libc_thr_attr_setdetachstate pthread_detach __libc_thr_detach pthread_join __libc_thr_join New pthread.h macros defined if _NETBSD_PTHREAD_CREATE_WEAK is defined first: pthread_create __libc_thr_create New symbols defined by libc as weak aliases for stubs that always fail but can be overridden by libpthread: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that libc already defined __libc_thr_create. New internal stubs, not for overriding: __libc_thr_detach_stub __libc_thr_join_stub These were formerly called __libc_pthread_detach and __libc_pthread_join, respectively, and libc has defined weak aliases pthread_detach and pthread_join for them since 2013. I retained all four of those symbols, but defined new ones in the __ namespace that match the pattern for other thread stubs to avoid raising questions about why the pattern seems to be broken. I left a comment noting this fact too. New pthread strong aliases to override the libc symbols: __libc_thr_attr_destroy __libc_thr_attr_init __libc_thr_attr_setdetachstate __libc_thr_detach __libc_thr_join Note that pthread already defined a strong __libc_thr_create alias for the real pthread_create, so there is no need to add a new one. PR lib/59685: libcrypto should not depend on libpthread
1.2	31-Mar-2025	riastradh	branches: 1.2.4; libpthread(3): Add missing cancellation points. - accept4 - tcdrain XXX Should our nonstandard alias paccept(2) also be a cancellation point? PR lib/59240: POSIX.1-2024: cancellation point audit
1.1	22-Nov-2024	riastradh	libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.2.4.2	02-Aug-2025	perseant	Sync with HEAD
1.2.4.1	31-Mar-2025	perseant	file pthread_mi.expsym was added on branch perseant-exfatfs on 2025-08-02 05:54:55 +0000
1.19	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.18	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.17	29-Jan-2020	kamil	Check thread->pt_magic with PT_MAGIC promptly
1.16	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.15	21-Mar-2013	christos	branches: 1.15.30; 1.15.32; - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.14	12-Aug-2009	enami	branches: 1.14.6; 1.14.8; 1.14.12; Make nanosleep cancelable again.
1.13	11-Jan-2009	christos	merge christos-time_t
1.12	29-Dec-2008	christos	branches: 1.12.2; revert previous. It was meant for the branch
1.11	28-Dec-2008	christos	adjust for time_t 64
1.10	28-Jun-2008	ad	branches: 1.10.4; 1.10.8; Shut lint up.
1.9	24-Jun-2008	ad	pthread_kill, pthread_sigmask: return errno, not the return from the system call. Found by VSTHlite.
1.8	28-Apr-2008	martin	branches: 1.8.2; Remove clause 3 and 4 from TNF licenses
1.7	10-Feb-2008	ad	branches: 1.7.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.6	09-Feb-2008	yamt	update for _sched_{get,set}param changes. from rmind@.
1.5	26-Jan-2008	rmind	sched_setparam: fix the case when incorrect (according to the class) in-kernel priority is used. Reported by <drochner>. Minor fixes for scheduling calls to conform the POSIX: - If pid is equal to zero, use the calling process; - In case of permission problem, return EPERM instead of EACESS; - sched_setscheduler() should return previously used policy; - pthread_* calls should return the error code or zero; Should fix the namespace problems (and builds of some packages): - Move cpuset_t defintion from pset.h to sched.h; - Remove the #include of pset.h in pthread.h;
1.4	15-Jan-2008	rmind	Implementation of processor-sets, affinity and POSIX real-time extensions. Add schedctl(8) - a program to control scheduling of processes and threads. Notes: - This is supported only by SCHED_M2; - Migration of LWP mechanism will be revisited; Proposed on: <tech-kern>. Reviewed by: <ad>.
1.3	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.2	16-Aug-2007	ad	branches: 1.2.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.1	02-Mar-2007	ad	branches: 1.1.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.1.2.1	03-Sep-2007	skrll	Sync with HEAD.
1.2.2.2	23-Mar-2008	matt	sync with HEAD
1.2.2.1	09-Jan-2008	matt	sync with HEAD
1.7.4.1	18-May-2008	yamt	sync with head.
1.8.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.10.8.1	21-Apr-2010	matt	sync to netbsd-5
1.10.4.1	05-Sep-2009	bouyer	Pull up following revision(s) (requested by enami in ticket #921): lib/libpthread/pthread_misc.c: revision 1.14 via patch lib/libpthread/pthread_cancelstub.c: revision 1.27 via patch Make nanosleep cancelable again.
1.12.2.2	29-Dec-2008	christos	commit changes to the right branch.
1.12.2.1	29-Dec-2008	christos	file pthread_misc.c was added on branch christos-time_t on 2008-12-29 15:10:58 +0000
1.14.12.1	23-Jun-2013	tls	resync from head
1.14.8.1	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.14.6.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.15.32.1	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.15.30.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.12	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.11	27-Dec-2019	msaitoh	branches: 1.11.10; s/sucess/success/ in comment.
1.10	22-Oct-2017	abhinav	branches: 1.10.4; Add missing function names in the NAME section for rest of the man pages in libpthread
1.9	30-Oct-2016	kamil	POSIX harder the pthread_mutex_timedlock(3) prototype Add missing __restrict keyword to the first pointer parameter. It was already used for the second argument, should not be a functional change and generated code should be the same. This new form is now aligned with POSIX.
1.8	05-Jul-2016	wiz	branches: 1.8.2; Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.7	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.6	12-Nov-2012	uwe	Use .Vt type var No = Dv INITIALIZER; to provide examples of static initialization in SYNOPSIS section. .Va macro does the wrong thing (check groff PostScript output) and the need for .Pp kludge (now dropped) should have been an indication too. While here move static initialization example to be right after the declaration of *_init().
1.5	09-Jul-2010	wiz	branches: 1.5.6; 1.5.12; Mark up NULL.
1.4	08-Jul-2010	wiz	Add comma in enumeration, sort errors.
1.3	08-Jul-2010	jruoho	Add missing word.
1.2	08-Jul-2010	jruoho	Continue the discussion with few remarks and rearrange slightly.
1.1	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.5.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.5.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.8.2.1	04-Nov-2016	pgoyette	Sync with HEAD
1.10.4.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.11.10.1	02-Aug-2025	perseant	Sync with HEAD
1.83	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.82	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.81	11-Jun-2020	ad	Adjust memory barriers.
1.80	10-Jun-2020	ad	- Make pthread_condvar and pthread_mutex work on the stack rather than in pthread_t, so there's less chance of bad things happening if someone calls (for example) pthread_cond_broadcast() from a signal handler. - Remove all the deferred waiter handling except for the one case that really matters which is transferring waiters from condvar -> mutex on wakeup, and do that by splicing the condvar's waiters onto the mutex. - Remove the mutex waiters bit as it's another complication that's not strictly needed.
1.79	03-Jun-2020	ad	Deal with a couple of problems with threads being awoken early due to timeouts or cancellation where: - The restarting thread calls _lwp_exit() before another thread gets around to waking it with _lwp_unpark(), leading to ESRCH (observed by joerg@). (I may have removed a similar check mistakenly over the weekend.) - The restarting thread considers itself gone off the sleep queue but at the same time another thread is part way through waking it, and hasn't fully completed that operation yet by setting thread->pt_mutexwait = 0. I think that could have potentially lead to the list of waiters getting messed up given the right circumstances.
1.78	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.77	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.76	16-Feb-2020	kamil	Revert "Enhance the pthread(3) + malloc(3) init model" It is reported to hand on aarch64 with gzip.
1.75	15-Feb-2020	kamil	Enhance the pthread(3) + malloc(3) init model Separate the pthread_atfork(3) call from pthread_tsd_init() and move it into a distinct function. Call inside pthread__init() late TSD initialization route, just after "pthread_atfork(NULL, NULL, pthread__fork_callback);". Document that malloc(3) initialization is now controlled again and called during the first pthread_atfork(3) call. Remove #if 0 code from pthread_mutex.c as we no longer initialize malloc prematurely.
1.74	01-Feb-2020	kamil	Revert previous 'git grep' breaks now.
1.73	01-Feb-2020	kamil	Remove 'ifdef 0' hacks It is no longer needed as the proper fix avoiding premature malloc() landed the sources.
1.72	31-Jan-2020	kamil	Refactor libpthread checks for invalid arguments Switch from manual functions to pthread__error().
1.71	31-Jan-2020	christos	In the same spirit as the previous pthread_mutex_init change for jemalloc, make pthread_mutexattr_init do always a full initialization, so that the attribute that will be used later when we become threaded is properly initialized.
1.70	29-Jan-2020	kamil	Use pthread_mutexattr_t and pthread_mutex_t magic fields Validate _PT_MUTEX_MAGIC in pthread_mutex_t and _PT_MUTEXATTR_MAGIC in pthread_mutexattr_t accordingly.
1.69	29-Jan-2020	kamil	Mark destroyed pthread_mutexattr_t as dead
1.68	25-Jan-2020	ad	Adjustment to previous: don't call _lwp_unpark_all() with nwaiters == 0.
1.67	25-Jan-2020	ad	pthread__mutex_unlock_slow(): ignore the DEFERRED bit. It's only purpose is to get the thread to go through the slow path. If there are waiters, process them there and then. Should not affect well behaved apps. Maybe of help for: PR bin/50350: rump/rumpkern/t_sp/stress_{long,short} fail on Core 2 Quad
1.66	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.65	05-Mar-2019	christos	branches: 1.65.2; Jemalloc initializes mutexes before we become threaded and expects to use them later.
1.64	08-Dec-2017	kre	branches: 1.64.4; Deal with more lwp_park() timestamp unconsting
1.63	31-Oct-2016	christos	Don't spin if we already own the mutex, otherwise we will get stuck spinning forever, fixes timemutex{1,2} tests.
1.62	17-Jul-2016	skrll	Use anonymous union for ptm_ceiling and old __pthread_spin_t field to maintain backward compatibility and fix hppa build. hppa has an non- integer type __pthread_spin_t
1.61	16-Jul-2016	skrll	KNF
1.60	03-Jul-2016	christos	branches: 1.60.2; GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.59	03-Feb-2014	rmind	pthread__mutex_lock_slow: fix the handling of a potential race with the non-interlocked CAS in the fast unlock path -- it is unsafe to test for the waiters-bit while the owner thread is running, we have to spin for the owner or its state change to be sure about the presence of the bit. Split off the logic into the pthread__mutex_setwaiters() routine. This is a partial fix to the named lockup problem (also see PR/44756). It seems there is another race which can be reproduced on faster CPUs.
1.58	31-Jan-2014	christos	remove compatibility code for handling CLOCK_MONOTONIC and handle it in the syscall directly.
1.57	31-Jan-2014	christos	PR/44756: Sad Clouds: Prevent leakage of errno = ESRCH from _lwp_park. This has two parts: - in pthread_cond_timedwait() if the thread we are trying to unpark exited, retry the the _lwp_park call without it. - pthread_mutex() was affecting errno since it is calling _lwp_park() from pthread_mutex_lock_slow(). preserve the original errno. Note that the example problem still causes an occassional deadlock on machines with many CPUs and it is the same deadlock we observe with named.
1.56	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.55	06-Mar-2013	yamt	add comments whitespace
1.54	16-Aug-2012	matt	branches: 1.54.2; Add a pthread__smt_wake and add support for it on arm along with pthread__smt_pause. These are implemented using the ARM instructions SEV (wake) and WFE (pause). These are treated as NOPs on ARM CPUs that don't support them.
1.53	13-Mar-2012	joerg	Move the pthread_once alias where it belongs.
1.52	12-Mar-2012	joerg	Move pthread_once implementation into a separate file, it doesn't depend on the mutex implementation in any way.
1.51	02-Aug-2008	matt	branches: 1.51.2; 1.51.4; 1.51.6; 1.51.22; Change pthread_mutex_t to use the amount of space as and be congruent to the version used in the SA version of pthreads. This preserves binary compatibility between both versions of the library.
1.50	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.49	25-May-2008	ad	Add some general comments about the mutex implementation.
1.48	28-Apr-2008	martin	branches: 1.48.2; Remove clause 3 and 4 from TNF licenses
1.47	07-Mar-2008	ad	branches: 1.47.2; pthread__mutex_lock_slow: - don't stop spinning if there are already waiters on the mutex, there is no point. - cosmetic change.
1.46	23-Feb-2008	ad	Fix pthread_mutex_trylock() for recursive mutexes. PR lib/38087. Based on a patch provided by rafal@.
1.45	14-Feb-2008	ad	branches: 1.45.2; Adjust mutex/rwlock definitions to match reality now that there is only one implementation of each. PR lib/38030.
1.44	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.43	25-Jan-2008	rafal	Make this compile after Andrew's fix (remove now-unused variables)
1.42	25-Jan-2008	ad	pthread_mutex_lock_slow: remove "deliberate deadlock" code that's not needed with 1:1. PR lib/37524.
1.41	08-Jan-2008	christos	add missing static decls.
1.40	05-Jan-2008	ad	machine/lock.h, not sys/lock.h
1.39	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.38	19-Nov-2007	ad	Remove the debuglog stuff. ktrace is more useful now.
1.37	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.36	13-Sep-2007	ad	Add a per-mutex deferred wakeup flag so that threads doing something like the following do not wake other threads early: pthread_mutex_lock(&mutex); pthread_cond_broadcast(&cond); foo = malloc(100); /* takes libc mutexes */ pthread_mutex_unlock(&mutex);
1.35	11-Sep-2007	ad	Fix inverted test after merge of nick-csl-alignment.
1.34	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.33	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.32	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.31	16-Aug-2007	ad	branches: 1.31.2; One more micro-optimization..
1.30	16-Aug-2007	ad	Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.29	04-Aug-2007	ad	branches: 1.29.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.28	24-Mar-2007	ad	branches: 1.28.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.27	20-Mar-2007	ad	- Maintain a per-thread pointer to the last mutex acquired by the app, to be used only as as a hint. Clear the pointer when releasing the mutex. - When releasing a mutex, wake all waiters. Makes it possible to tranfer waiters from another object to a mutex.
1.26	05-Mar-2007	ad	Update to match changed pthread__park() interface.
1.25	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.24	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.23	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.22	22-Aug-2006	wrstuden	branches: 1.22.2; 1.22.4; Close a window in which we can not notice a recently-slept-on-our mutex thread, thus leaving a thread sleeping on an unlocked mutex. Reviewed by myself and Christos. Problem reported by Arne H. Juul, arnej at pvv dot ntnu dot no, in PR 26208. This fix represents option 1 presented in the PR.
1.21	19-Oct-2005	chs	branches: 1.21.2; starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. I also noticed that there's a "sem2" test that has never worked in its single-threaded form. the problem there is that a signal handler tries to take a sem_t interlock which is already held when the signal is received. fix this too, by adding a single-threaded case for sig_trywait() that blocks signals instead of using the userland interlock.
1.20	16-Oct-2005	chs	in pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. fixes PR 20256, PR 24241, PR 25722, PR 26096.
1.19	16-Jul-2005	nathanw	Add cancellation protection to pthread_once() as per the standard; if the once routine is cancelled, the effect on once_control is as if pthread_once() was never called. Bug report and fix from PR lib/30734.
1.18	14-Mar-2004	cl	branches: 1.18.6; add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.17	24-Nov-2003	cl	Update mutex/rwlock/sem code to match recent change in cond code.
1.16	27-May-2003	christos	add missing notreached lint comment.
1.15	16-May-2003	nathanw	Separately report unlocking an unlocked mutex and unlocking a mutex owned by another thread.
1.14	23-Apr-2003	nathanw	Use pthread__error() instead of pthread__abort().
1.13	18-Apr-2003	nathanw	More agressive assertions. Change a number of detected conditions, which officially have undefined behavior, from returning an error code to raising an assertion failure. Also, don't bother to explicitly test for (illegal) null pointers and return an error; they'll bomb out soon enough.
1.12	16-Apr-2003	nathanw	pthread_mutex_trylock(): It's not an error to call trylock() on a mutex already locked by the calling thread, even for non-recursive mutexes.
1.11	16-Apr-2003	nathanw	When a thread sleeps on a mutex or cv, have it put itself on the front of the sleep queue rather than the back. This is more cache-friendly behavior and within the (lack of) constraints on wakeup ordering imposed on equal-priority threads.
1.10	08-Mar-2003	lukem	add __RCSID()
1.9	15-Feb-2003	nathanw	Remove unnecessary inclusion of <assert.h>.
1.8	31-Jan-2003	nathanw	Mutex tuneup. * Use a double-checked locking technique to avoid taking the interlock in pthread_mutex_unlock(). * In pthread_mutex_lock() and pthread_mutex_trylock(), only store the stack pointer, not the thread ID, in ptm_owner. Do the translation to a thread ID in the slow-lock, errorcheck, and recursive mutex cases rather than in the common path. * Juggle where pthread__self() is called, to move it out of the fast path. Overall, this means that neither pthread_self() nor pthread_spin[un]lock() are used in the course of locking and unlocking an uncontested mutex. Speeds up the fast path by 40-50%, and eliminates about 98% of spinlocks used by a couple of large threaded applications. (Still a GET_MUTEX_PRIVATE() in the fast path... perhaps the type should be in the main body of the mutex).
1.7	27-Jan-2003	nathanw	Add debug counters for mutex and condvar operations.
1.6	22-Jan-2003	scw	Need to include <string.h> for memcmp() prototype.
1.5	19-Jan-2003	thorpej	Fix typo.
1.4	19-Jan-2003	thorpej	Add mutexattr_init(), mutexattr_destroy(), and mutexattr_settype() (recursive mutexes are used by the X libraries).
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_mutex.c was initially added on branch nathanw_sa.
1.1.2.20	14-Jan-2003	thorpej	Move a comment to a more logical location.
1.1.2.19	13-Jan-2003	thorpej	Implement recursive and errorcheck mutexes.
1.1.2.18	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.17	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.16	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.15	26-Oct-2002	nathanw	Whitespace in comments.
1.1.2.14	23-Oct-2002	nathanw	Revert previous. There's still a race condition whose avoidance requires checking the blocked queue with the interlock held.
1.1.2.13	22-Oct-2002	nathanw	Speed up pthread_mutex_unlock() similarly to what was done to pthread_mutex_lock(): heavily optimize for the case of a mutex with no waiters, and defer the waiter case to a separate function. Uncontested mutexes now no longer use library spin locks.
1.1.2.12	04-Oct-2002	nathanw	Tweak pthread_mutex_lock(): Move the "slow" code to another function and only call pthread_self() inside that function. Don't use pthread_self() to track ownership; just stash the stack pointer. Translation to thread IDs can be done post-mortem if necessary (Thanks to Greg Hudson for pointing this out).
1.1.2.11	26-Apr-2002	nathanw	Track the synchronization object being slept on.
1.1.2.10	11-Apr-2002	nathanw	Revert weak aliases.
1.1.2.9	25-Mar-2002	nathanw	Oops, that function is pthread_once(), not pthread_mutex_once().
1.1.2.8	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.7	28-Jan-2002	nathanw	Cancellation support. This includes implementing pthread_cancel() and pthread_testcancel(), making pthread_join() and pthread_cond_wait() cancellation points, introducing new states to distinguish waiting on a sleep queue from waiting in the kernel, and introducing a locking protocol around changing a thread's run state.
1.1.2.6	08-Aug-2001	nathanw	Implement pthread_once().
1.1.2.5	25-Jul-2001	nathanw	Stadardize and clean up use of ERRORCHECK. Implement pthread_{cond,mutex}attr_{init,destroy} and make the relevant functions check for their validity. (No non-default attribute values are supported, but these interfaces are required anyway).
1.1.2.4	24-Jul-2001	nathanw	Remove some unnecessary includes. Prefix some application-visible preprocessor symbols with an underscore. Modify pthread_mutex_unlock() to only wake up one waiter.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Convert to new queue type. Remove a level of indirection in the definition and use of pthread_mutex_t. Add a note about Pthreads memory visibility rules. Use an optimistic simple-lock approach for locking mutexes. Should be faster in the common case.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.18.6.2	25-Aug-2006	ghen	Pull up following revision(s) (requested by wrstuden in ticket #1474): lib/libpthread/pthread_mutex.c: revision 1.22 Close a window in which we can not notice a recently-slept-on-our mutex thread, thus leaving a thread sleeping on an unlocked mutex. Reviewed by myself and Christos. Problem reported by Arne H. Juul, arnej at pvv dot ntnu dot no, in PR 26208. This fix represents option 1 presented in the PR.
1.18.6.1	01-Nov-2005	jmc	branches: 1.18.6.1.2; Pullup revs 1.20-1.21 (requested by chs in ticket #926) In pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. PR#20256, PR#24241, PR#25722, PR#26096 Fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. PR#30348 In pthread_kill() and pthread_suspend_np(), return without doing anything f the target thread is a zombie. In all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). Starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. If mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.18.6.1.2.1	25-Aug-2006	ghen	Pull up following revision(s) (requested by wrstuden in ticket #1474): lib/libpthread/pthread_mutex.c: revision 1.22 Close a window in which we can not notice a recently-slept-on-our mutex thread, thus leaving a thread sleeping on an unlocked mutex. Reviewed by myself and Christos. Problem reported by Arne H. Juul, arnej at pvv dot ntnu dot no, in PR 26208. This fix represents option 1 presented in the PR.
1.21.2.1	25-Aug-2006	ghen	Pull up following revision(s) (requested by wrstuden in ticket #52): lib/libpthread/pthread_mutex.c: revision 1.22 Close a window in which we can not notice a recently-slept-on-our mutex thread, thus leaving a thread sleeping on an unlocked mutex. Reviewed by myself and Christos. Problem reported by Arne H. Juul, arnej at pvv dot ntnu dot no, in PR 26208. This fix represents option 1 presented in the PR.
1.22.4.2	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.22.4.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.22.2.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.28.2.4	10-Sep-2007	skrll	Sync with HEAD.
1.28.2.3	03-Sep-2007	skrll	Sync with HEAD.
1.28.2.2	15-Aug-2007	skrll	Sync with HEAD.
1.28.2.1	18-Jul-2007	skrll	Initial work on provided correctly aligned __cpu_simple_lock_t for hppa and first attempt at adapting i386 to the changes. More to come.
1.29.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.29.2.1	04-Aug-2007	ad	file pthread_mutex.c was added on branch matt-mips64 on 2007-08-04 13:37:50 +0000
1.31.2.3	23-Mar-2008	matt	sync with HEAD
1.31.2.2	09-Jan-2008	matt	sync with HEAD
1.31.2.1	06-Nov-2007	matt	sync with HEAD
1.45.2.1	24-Mar-2008	keiichi	sync with head.
1.47.2.2	04-Jun-2008	yamt	sync with head
1.47.2.1	18-May-2008	yamt	sync with head.
1.48.2.2	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.48.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.51.22.2	20-Feb-2014	sborrill	Pull up the following revisions(s) (requested by prlw1 in ticket #1029): lib/libpthread/pthread_cond.c: revision 1.62 lib/libpthread/pthread_mutex.c: revision 1.57,1.59 Partial fix for thread deadlock commonly observed with named. Also address PR/44756.
1.51.22.1	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.51.6.2	02-Aug-2008	matt	Change pthread_mutex_t to use the amount of space as and be congruent to the version used in the SA version of pthreads. This preserves binary compatibility between both versions of the library.
1.51.6.1	02-Aug-2008	matt	file pthread_mutex.c was added on branch christos-time_t on 2008-08-02 19:46:31 +0000
1.51.4.1	20-Feb-2014	sborrill	Pull up the following revisions(s) (requested by prlw1 in ticket #1898): lib/libpthread/pthread_cond.c: revision 1.62 lib/libpthread/pthread_mutex.c: revision 1.57,1.59 Partial fix for thread deadlock commonly observed with named. Also address PR/44756.
1.51.2.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.51.2.2	30-Oct-2012	yamt	sync with head
1.51.2.1	17-Apr-2012	yamt	sync with head
1.54.2.2	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.54.2.1	23-Jun-2013	tls	resync from head
1.60.2.2	04-Nov-2016	pgoyette	Sync with HEAD
1.60.2.1	26-Jul-2016	pgoyette	Sync with HEAD
1.64.4.2	08-Apr-2020	martin	Merge changes from current as of 20200406
1.64.4.1	10-Jun-2019	christos	Sync with HEAD
1.65.2.1	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_mutex.h was initially added on branch nathanw_sa.
1.1.2.2	13-Jul-2001	nathanw	Contents have moved to other headers.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.18	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.17	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.16	07-Dec-2007	ad	pthread__mutex_lock_slow: avoid entering the waiters list if a race to acquire the mutex is lost. Removing the current thread from the waiters list requires at least one syscall.
1.15	04-Dec-2007	yamt	pthread__mutex_wakeup: ignore ESRCH from _lwp_unpark. once we clear pt_sleeponq, the target thread can proceed further and even do pthread_exit.
1.14	04-Dec-2007	yamt	remove unnecessary assignments.
1.13	27-Nov-2007	ad	Fix a warning with _LP64.
1.12	14-Nov-2007	ad	Don't try to block if there are already waiters; it doesn't make sense.
1.11	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.10	04-Oct-2007	ad	branches: 1.10.2; Fix a thinko.
1.9	21-Sep-2007	ad	Adjust previous for clarity.
1.8	21-Sep-2007	ad	pthread__mutex_unlock_slow: always catch up with deferred wakeups, because pthread_mutex_unlock clears the per-mutex indicator.
1.7	13-Sep-2007	ad	Add a per-mutex deferred wakeup flag so that threads doing something like the following do not wake other threads early: pthread_mutex_lock(&mutex); pthread_cond_broadcast(&cond); foo = malloc(100); /* takes libc mutexes */ pthread_mutex_unlock(&mutex);
1.6	11-Sep-2007	ad	Make the new mutexes faster: - Eliminate mutexattr_private and just set a bit in ptm_owner if the mutex is recursive. This forces the slow path to be taken for recursive mutexes. Overload an unused field in pthread_mutex_t to record whether or not it's an errorcheck mutex. - Streamline pthread_mutex_lock / pthread_mutex_unlock a bit more. As a side effect makes it possible to have assembly stubs for them.
1.5	11-Sep-2007	ad	Fix broken pthread_mutex_trylock().
1.4	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.3	09-Sep-2007	ad	branches: 1.3.2; Fix recursive mutexes to work again in non-threaded applications.
1.2	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.1	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.3.2.2	10-Sep-2007	skrll	Sync with HEAD.
1.3.2.1	09-Sep-2007	skrll	file pthread_mutex2.c was added on branch nick-csl-alignment on 2007-09-10 10:54:06 +0000
1.10.2.4	23-Mar-2008	matt	sync with HEAD
1.10.2.3	09-Jan-2008	matt	sync with HEAD
1.10.2.2	06-Nov-2007	matt	sync with HEAD
1.10.2.1	04-Oct-2007	matt	file pthread_mutex2.c was added on branch matt-armv6 on 2007-11-06 23:11:43 +0000
1.5	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.4	26-May-2008	wiz	branches: 1.4.6; Sort ERRORS.
1.3	04-May-2008	martin	branches: 1.3.2; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.2	04-Jun-2008	yamt	sync with head
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.4.6.2	26-May-2008	wiz	Sort ERRORS.
1.4.6.1	26-May-2008	wiz	file pthread_mutex_destroy.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.7	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.6	20-May-2010	jruoho	Note the initializer macros.
1.5	26-May-2008	wiz	branches: 1.5.6; Sort ERRORS.
1.4	04-May-2008	martin	branches: 1.4.2; Move TNF licenses to 2 clause form
1.3	21-Mar-2005	kleink	branches: 1.3.20; Add restrict qualifiers to <pthread.h> function arguments.
1.2	08-Jun-2003	thorpej	branches: 1.2.6; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.6.1	22-Mar-2005	tron	Pull up revision 1.3 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.3.20.2	04-Jun-2008	yamt	sync with head
1.3.20.1	18-May-2008	yamt	sync with head.
1.4.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.5.6.2	26-May-2008	wiz	Sort ERRORS.
1.5.6.1	26-May-2008	wiz	file pthread_mutex_init.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.7	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.6	26-May-2008	wiz	branches: 1.6.6; Sort ERRORS.
1.5	04-May-2008	martin	branches: 1.5.2; Move TNF licenses to 2 clause form
1.4	04-Jul-2003	wiz	branches: 1.4.32; Drop trailing whitespace.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.4.32.2	04-Jun-2008	yamt	sync with head
1.4.32.1	18-May-2008	yamt	sync with head.
1.5.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.6.6.2	26-May-2008	wiz	Sort ERRORS.
1.6.6.1	26-May-2008	wiz	file pthread_mutex_lock.3 was added on branch christos-time_t on 2008-05-26 08:43:58 +0000
1.4	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.3	04-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	04-May-2008	martin	file pthread_mutex_unlock.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.15	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.14	02-Feb-2017	njoly	branches: 1.14.24; Fix a typo : pthread_mutexaddr_init -> pthread_mutexattr_init.
1.13	05-Jul-2016	wiz	branches: 1.13.2; 1.13.4; Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.12	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.11	08-Jul-2010	jruoho	.Xr instaed of .Fn for pthread_mutex_init(3), update the error codes, cleanup STANDARDS, etc.
1.10	20-May-2010	jruoho	Use a list with the mutex type. Note, from the standard, that recursive mutexes should be avoided when condition variables are used.
1.9	11-Apr-2009	wiz	Avoid duplicate .Pp.
1.8	04-May-2008	martin	branches: 1.8.8; 1.8.10; Move TNF licenses to 2 clause form
1.7	17-Apr-2007	heinz	branches: 1.7.12; Fixed spelling error.
1.6	17-Jun-2005	wiz	New sentence, new line.
1.5	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.3	04-Jul-2003	wiz	branches: 1.3.4; 1.3.6; Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.6.2	18-Jun-2005	tron	Pull up revision 1.5 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3.6.1	22-Mar-2005	tron	Pull up revision 1.4 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.3.4.1	21-Jun-2005	riz	Pull up revision 1.5 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.7.12.1	18-May-2008	yamt	sync with head.
1.8.10.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.8.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.8.8.1	04-May-2008	martin	file pthread_mutexattr.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.13.4.1	21-Apr-2017	bouyer	Sync with HEAD
1.13.2.1	20-Mar-2017	pgoyette	Sync with HEAD
1.14.24.1	02-Aug-2025	perseant	Sync with HEAD
1.10	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.9	12-Nov-2012	uwe	Refer to init_routine in the DESCRIPTION section with .Fa instead of .Fn
1.8	12-Nov-2012	uwe	Use .Vt type var No = Dv INITIALIZER; to provide examples of static initialization in SYNOPSIS section. .Va macro does the wrong thing (check groff PostScript output) and the need for .Pp kludge (now dropped) should have been an indication too. While here move static initialization example to be right after the declaration of *_init().
1.7	09-Jul-2010	jruoho	branches: 1.7.6; 1.7.12; Update conformance to the 2001 revision.
1.6	20-May-2010	jruoho	Use similar markup than in pthread_mutex_init(3) etc. with the initializer macro. Improve wording slightly.
1.5	16-May-2010	jruoho	.Dv.
1.4	22-Mar-2010	joerg	Use .In instead of .Ar Pa
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_once.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.7.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.7.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.5	04-Mar-2025	riastradh	pthread_once(3): Add missing memory barriers. PR lib/59126: pthread_once(3): missing memory ordering
1.4	12-Feb-2022	riastradh	branches: 1.4.4; libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.3	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.2	13-Mar-2012	joerg	branches: 1.2.2; 1.2.4; Move the pthread_once alias where it belongs.
1.1	12-Mar-2012	joerg	Move pthread_once implementation into a separate file, it doesn't depend on the mutex implementation in any way.
1.2.4.1	23-Jun-2013	tls	resync from head
1.2.2.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.2.2.2	17-Apr-2012	yamt	sync with head
1.2.2.1	13-Mar-2012	yamt	file pthread_once.c was added on branch yamt-pagecache on 2012-04-17 00:05:31 +0000
1.4.4.1	02-Aug-2025	perseant	Sync with HEAD
1.7	19-Apr-2022	rillig	lib: remove CONSTCOND comment Since 2021-01-31, lint doesn't need it anymore for the common pattern of 'do ... while (0)'.
1.6	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.5	05-Oct-2009	rmind	Add check to avoid multiple inclusions and redefinitions. KNF while here.
1.4	28-Apr-2008	martin	branches: 1.4.8; Remove clause 3 and 4 from TNF licenses
1.3	18-Jan-2003	christos	branches: 1.3.32; de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Jul-2001	nathanw	branches: 1.1.2; file pthread_queue.h was initially added on branch nathanw_sa.
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	13-Jul-2001	nathanw	A statically-initializable tail queue, necessary for various pthread structures.
1.3.32.1	18-May-2008	yamt	sync with head.
1.4.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.4.8.1	28-Apr-2008	martin	file pthread_queue.h was added on branch christos-time_t on 2008-04-28 20:23:02 +0000
1.1	22-Nov-2024	riastradh	branches: 1.1.4; libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.1.4.2	02-Aug-2025	perseant	Sync with HEAD
1.1.4.1	22-Nov-2024	perseant	file pthread_ras.expsym was added on branch perseant-exfatfs on 2025-08-02 05:54:55 +0000
1.24	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.23	20-Jan-2007	christos	sprinkle volatile.
1.22	16-Jan-2007	ad	For 1:1 threads: __strong_alias(__libc_thr_yield,_sys_sched_yield)
1.21	08-Jan-2007	drochner	bring sched_yield() back which got lost recently
1.20	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.19	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.18	06-Jan-2005	mycroft	branches: 1.18.10; 1.18.12; Replace the even-odd test for incrementing unblockgen with a simple blockgen!=unblockgen. I'm not sure this is 100% correct, but it partly alleviates a problem with multiple unblocks for the same thread getting stacked up.
1.17	14-Mar-2004	cl	add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.16	16-Jan-2004	cl	- delay making a thread unblocked until it's put on the runqueue. - simplify handling of blocked idle threads. This should fix the ``assertion "target->pt_state != PT_STATE_RUNNING \|\| target->pt_blockgen != target->pt_unblockgen" failed'' problem reported by Marc Recht and Steve Bellovin on current-users. Also g/c unused pthread__sched_bulk call left over from pthread_sa.c rev. 1.22 change.
1.15	02-Jan-2004	cl	logging/debugging changes: - add PTHREAD_PID_DEBUG which prints the pid before each debuglog line - output thread returned in pthread__next - add asserts in pthread__sched akin to asserts in pthread__sched_bulk: check if scheduled thread is at front/end of queue - pthread__upcall: output event/interrupted LWP count instead of LWPid of the first event/interrupted LWP (since unblock upcalls can have multiple event LWPs). - pthread__find_interrupted: output LWPid here
1.14	07-Dec-2003	christos	Add pthread_{g,s}etschedparam, that do nothing.
1.13	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.12	16-Sep-2003	cl	fix SA/pthread pagefault failure: - prevent BLOCKED upcalls on double page faults and during upcalls - make libpthread handle blocked threads which hold locks - prevent UNBLOCKED upcalls from overtaking their BLOCKED upcall this adds a new syscall sa_unblockyield see also http://mail-index.netbsd.org/tech-kern/2003/09/15/0020.html
1.11	26-Jun-2003	nathanw	Clear pt_trapuc when idling threads.
1.10	27-May-2003	christos	pass lint: 1. add new pthread__abort() and change pthread_assert(0) to it. 2. put constcond in the right place (in the macro). 3. no space after pthread__assert macro.
1.9	04-Apr-2003	nathanw	Don't call pthread__locked_switch() to switch to ourself. Bad stack mangling results. Fixes regression in test yield2, dating to 2003/1/2 when pthread__locked_switch() was changed to not store the saved-context pointer until after switching stacks. Note to self: regression tests exist to be run.
1.8	08-Mar-2003	lukem	add __RCSID()
1.7	15-Feb-2003	nathanw	Adapt to pthread__assert() and remove local debug toggle.
1.6	31-Jan-2003	tron	Add a missing bracket to make this compile.
1.5	31-Jan-2003	nathanw	Add a new internal function, pthread__sched_sleepers(), which iterates over a sleep queue and puts everything on the run queue. This permits the iteration to be inside the acquisition of the run queue spinlock, avoiding repetitive acquire/release cycles.
1.4	30-Jan-2003	nathanw	Set a thread's state to RUNNABLE when yielding.
1.3	19-Jan-2003	thorpej	Add some threadlib stubs that are used by X: * thr_create() (stub in libc aborts) * thr_exit() (stub in libc calls exit()) * thr_yield() (stub in libc does nothing) Also make the libc thr_self() stub not abort. XXX Should we add thrattr_*() stubs for setting the detach-state?
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_run.c was initially added on branch nathanw_sa.
1.1.2.20	02-Jan-2003	nathanw	Clean up the namespace a bit; make a few more things static, and make sure all private globals are prefixed with pthread__.
1.1.2.19	20-Dec-2002	nathanw	Set the type of an idle thread to PT_THREAD_IDLE only when it is created, not every time it's scheduled (left over from vestigal any-thread-can-be-idle code).
1.1.2.18	16-Dec-2002	nathanw	Don't let pthread__sched_idle2 operate on a thread that's part of a interrupted chain (pt_next != NULL). Clear pt_next when removing an idle thread from the chain.
1.1.2.17	14-Nov-2002	nathanw	Couple of spinlocks == 0 assertions.
1.1.2.16	28-Oct-2002	nathanw	Implement sched_yield(). Clean up trailing whitespace.
1.1.2.15	22-Oct-2002	nathanw	Use _INITCONTEXT_U() instead of _getucontext_u() to prime a fresh context.
1.1.2.14	14-Oct-2002	nathanw	Oops, correct typos in previous.
1.1.2.13	14-Oct-2002	nathanw	Explicitly clear the UC_USER bit from uc_flags after calling _getcontext_u() if we're going to call makecontext(), because makecontext() needs to affect registers other than the caller-save regs.
1.1.2.12	24-Apr-2002	nathanw	Track "Running" state.
1.1.2.11	08-Feb-2002	nathanw	Remove a redundant set of #defines for SDPRINTF. Wrap per-thread debugging counters in #ifdef PTHREAD__DEBUG.
1.1.2.10	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t. Add debug logging and assertions.
1.1.2.9	01-Aug-2001	nathanw	Whitespace style.
1.1.2.8	31-Jul-2001	nathanw	No, it turns out we can't have a C pthread__switch().
1.1.2.7	26-Jul-2001	nathanw	pthread__switch() no longer needs to be implemeted in assembler, and doesn't have a lock parameter.
1.1.2.6	25-Jul-2001	nathanw	Re-add a necessary include file (should have read those lint errors more carefully).
1.1.2.5	20-Jul-2001	nathanw	Reduce excessive header inclusion.
1.1.2.4	17-Jul-2001	nathanw	Clean up the state of used idle threads more carefully.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Convert to new queue type.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.18.12.4	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.18.12.3	19-Oct-2007	wrstuden	Work on cleaning up lock ordering. Turns out that there's not too much to do, other than fixing an issue in join and one I introduced. Add volumous comment in pthread_int.h describing how I understand the current locking to work. pthread_join() considered pt_flaglock to be a higher-priority lock than pt_join_lock. Life makes more sense if we flip that. To not make a lot of routines messy, pthread__runqueue_lock has to be lower in the lock ordering than pt_statelock. Adapt the changes I made to sched_yield() to this ordering. There still is a wart regarding setting the state of a thread we are taking off of the run (or idle) queue. We can't lock its pt_statelock as we have the runqueue lock held. For now, go back to what the old code did which was just write over the info. This isn't that bad as the only things that should be changing the state of this thread should be run-queue savy. I need to check this though....
1.18.12.2	25-Sep-2007	wrstuden	Rename pt_blockedlwp to pt_lastlwp, and set it whenever we switch to a new pthread. This way we always know on what lwp a given thread is running.
1.18.12.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.18.10.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.7	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.6	05-Jul-2016	wiz	Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.5	12-Nov-2012	uwe	Mark up (unsupported) PTHREAD_PROCESS_SHARED with .Dv macro.
1.4	12-Nov-2012	uwe	Use .Vt type var No = Dv INITIALIZER; to provide examples of static initialization in SYNOPSIS section. .Va macro does the wrong thing (check groff PostScript output) and the need for .Pp kludge (now dropped) should have been an indication too. While here move static initialization example to be right after the declaration of *_init().
1.3	09-Jul-2010	wiz	branches: 1.3.6; 1.3.12; Mark up NULL.
1.2	08-Jul-2010	wiz	Add comma in enumeration, sort errors.
1.1	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.3.12.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.3.6.1	16-Jan-2013	yamt	sync with (a bit old) head
1.44	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.43	11-Feb-2022	riastradh	libpthread: Fix membars around rwlocks. 1. After loading self->pt_rwlocked, membar_enter() must not be conditional on PTHREAD__ATOMIC_IS_MEMBAR because there is no atomic r/m/w operation here which could imply the acquire barrier. (This should maybe just be a load-acquire operation, but we don't have atomic_load_acquire in userland at the moment -- TBD.) 2. Before storing thread->pt_rwlocked, must issue membar_exit() so that this is a store-release operation -- except if we had just done an atomic r/m/w and PTHREAD__ATOMIC_IS_MEMBAR is set, in which case it can be elided. The second membar_exit() added here might be safely hoisted out of the loop but I'm not sure -- needs more analysis to prove that would be safe.
1.42	02-Jun-2020	joerg	Pass down errno when calling pthread__errorfunc after a system call. Allow format arguments for that reason and use (v)snprintf_ss in pthread_errorfunc to avoid race conditions and the like.
1.41	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.40	16-May-2020	ad	- Try to eliminate a hang in "parked" I've been seeing while stress testing. Centralise wakeup of deferred waiters in pthread__clear_waiters() and use throughout libpthread. Make fewer assumptions. Be more conservative in pthread_mutex when dealing with pending waiters. - Remove the "hint" argument everywhere since the kernel doesn't use it any more.
1.39	05-Feb-2020	kamil	Retire ifdef ERRORCHECK in pthread(3) It is enabled unconditionally since 2003 and used only for rwlocks and spinlocks. LLVM sanitizers make assumptions that these checks are enabled always.
1.38	31-Jan-2020	kamil	Refactor libpthread checks for invalid arguments Switch from manual functions to pthread__error().
1.37	13-Jan-2020	ad	Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.36	16-Dec-2019	uwe	pthread__rwlock_spin - clarify the test. It's more pedantically correct to check RW_WRITE_LOCKED before obtaining the thread id of the owner. And since there must be an owner annotate the guard NULL check as unlinkely. No functional change intended. Ok ad@.
1.35	15-Dec-2019	uwe	_DIAGASSERT that RW_FLAGMASK bits are not set in a thread pointer. rwlock uses lower bits of a thread pointer for flags in the lock owner field. Assert that the pointer is properly aligned and those bits are actually free to use. This may not be the case when a program uses its own allocator that can return less aligned pointers.
1.34	03-Jul-2016	christos	branches: 1.34.16; 1.34.18; GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.33	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.32	25-Oct-2008	yamt	branches: 1.32.4; 1.32.20; 1.32.22; 1.32.26; remove ; after __weak_alias()
1.31	23-Jun-2008	ad	Move call to pthread__self() later.
1.30	25-May-2008	ad	PR lib/38741 priority inversion in libpthread breaks apps that use SCHED_FIFO threads - Change condvar sync so that we never take the condvar's spinlock without first holding the caller-provided mutex. Previously, the spinlock was only taken without the mutex in an error path, but it was enough to trigger the problem described in the PR. - Even with this change, applications calling pthread_cond_signal/broadcast without holding the interlocking mutex are still subject to the problem described in the PR. POSIX discourages this saying that it leads to undefined scheduling behaviour, which seems good enough for the time being. - Elsewhere, use a hash of mutexes instead of per-object spinlocks to synchronize entry/exit from sleep queues. - Simplify how sleep queues are maintained.
1.29	28-Apr-2008	martin	branches: 1.29.2; Remove clause 3 and 4 from TNF licenses
1.28	08-Mar-2008	ad	branches: 1.28.2; _pthread_rwlock_held_np: if write locked, only return true if held by the current thread.
1.27	10-Feb-2008	ad	branches: 1.27.2; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.26	31-Jan-2008	ad	pthread_rwlock_wrheld_np: return true only if locked by the calling thread.
1.25	31-Jan-2008	mlelstv	use the correct symbols
1.24	08-Jan-2008	christos	no semis after weak alias.
1.23	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.22	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.21	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.20	16-Aug-2007	ad	branches: 1.20.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.19	04-Aug-2007	ad	branches: 1.19.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.18	24-Mar-2007	ad	branches: 1.18.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.17	05-Mar-2007	ad	Update to match changed pthread__park() interface.
1.16	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.15	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.14	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.13	19-Oct-2005	chs	branches: 1.13.4; 1.13.6; starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. I also noticed that there's a "sem2" test that has never worked in its single-threaded form. the problem there is that a signal handler tries to take a sem_t interlock which is already held when the signal is received. fix this too, by adding a single-threaded case for sig_trywait() that blocks signals instead of using the userland interlock.
1.12	16-Oct-2005	chs	in pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. fixes PR 20256, PR 24241, PR 25722, PR 26096.
1.11	09-Jan-2005	nathanw	branches: 1.11.2; pthread_rwlock_timedrdlock() and pthread_rwlock_timedwrlock(): After exiting the try-again loop, make one more test of the lock conditions, in case it was released while a signal handler kept the thread busy past the alarm expiration.
1.10	09-Jan-2005	nathanw	pthread_rwlock_timedrdlock() and pthread_rwlock_timedwrlock(): Expand the test for valid values of abs_timeout to check for negative values of tv_sec and tv_nsec.
1.9	03-Aug-2004	yamt	pthread_rwlock_timedrdlock/pthread_rwlock_timedwrlock: fix lock/unlock inversions in ERRORCHECK.
1.8	03-Aug-2004	yamt	pthread_rwlock_timedwrlock: return ETIMEDOUT appropriately.
1.7	09-Jan-2004	cl	branches: 1.7.2; - add deadlock check to pthread_rwlock_wrlock and pthread_rwlock_timedwrlock - return EPERM when unlocking a lock which isn't held => prevent the failure in PR 24023, where the citrus code had a deadlocking code path - remove deadlock check in pthread_rwlock_tryrdlock, return EBUSY instead => makes pthread_rwlock_tryrdlock standards compliant
1.6	24-Nov-2003	cl	Update mutex/rwlock/sem code to match recent change in cond code.
1.5	08-Mar-2003	lukem	add __RCSID()
1.4	15-Feb-2003	nathanw	Remove unnecessary inclusion of <assert.h>.
1.3	31-Jan-2003	nathanw	Use pthread__sched_sleepers() instead of iterating over sleep queues ourself.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Oct-2002	nathanw	branches: 1.1.2; file pthread_rwlock.c was initially added on branch nathanw_sa.
1.1.2.5	11-Jan-2003	skrll	Improve error checking. OK'd by Nathan.
1.1.2.4	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.3	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.2	18-Dec-2002	nathanw	Analagous to the fixes in pthread_cond.c, ensure that only one of an alarm callback or an unlock can remove a thread from a timed lock sleep and schedule it. Don't call pthread__alarm_fired() until after pthread__alarm_del().
1.1.2.1	28-Oct-2002	nathanw	Implement POSIX read-write locks.
1.7.2.2	12-Aug-2004	jmc	Pullup rev 1.9 (requested by yamt in ticket #751) pthread_rwlock_timedrdlock/pthread_rwlock_timedwrlock: fix lock/unlock inversions in ERRORCHECK.
1.7.2.1	12-Aug-2004	jmc	Pullup rev 1.8 (requested by yamt in ticket #749) pthread_rwlock_timedwrlock: return ETIMEDOUT appropriately.
1.11.2.1	01-Nov-2005	jmc	Pullup revs 1.12-1.13 (requested by chs in ticket #926) In pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. PR#20256, PR#24241, PR#25722, PR#26096 Fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. PR#30348 In pthread_kill() and pthread_suspend_np(), return without doing anything f the target thread is a zombie. In all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). Starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. If mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.13.6.2	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.13.6.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.13.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.18.2.3	10-Sep-2007	skrll	Sync with HEAD.
1.18.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.18.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.19.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.19.2.1	04-Aug-2007	ad	file pthread_rwlock.c was added on branch matt-mips64 on 2007-08-04 13:37:51 +0000
1.20.2.3	23-Mar-2008	matt	sync with HEAD
1.20.2.2	09-Jan-2008	matt	sync with HEAD
1.20.2.1	06-Nov-2007	matt	sync with HEAD
1.27.2.1	24-Mar-2008	keiichi	sync with head.
1.28.2.2	04-Jun-2008	yamt	sync with head
1.28.2.1	18-May-2008	yamt	sync with head.
1.29.2.2	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.29.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.32.26.1	23-Jun-2013	tls	resync from head
1.32.22.1	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.32.20.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.32.4.2	25-Oct-2008	yamt	remove ; after __weak_alias()
1.32.4.1	25-Oct-2008	yamt	file pthread_rwlock.c was added on branch christos-time_t on 2008-10-25 14:14:12 +0000
1.34.18.1	26-Jan-2020	martin	Pull up following revision(s) (requested by ad in ticket #647): lib/libpthread/pthread_rwlock.c: revision 1.37 (patch) lib/libpthread/pthread_misc.c: revision 1.16 lib/libpthread/pthread.c: revision 1.154 lib/libpthread/pthread_int.h: revision 1.98 lib/libpthread/pthread_cond.c: revision 1.66 lib/libpthread/pthread_mutex.c: revision 1.66 Rip out some very ambitious optimisations around pthread_mutex that are don't buy much. This stuff is hard enough to get right in the kernel let alone userspace, and I don't trust that it's right.
1.34.16.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.10	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.9	31-Jan-2008	ad	pthread_rwlock_wrheld_np: return true only if locked by the calling thread.
1.8	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.7	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.6	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.5	21-Sep-2007	ad	branches: 1.5.2; pthread_rwlock_unlock: return EPERM if the caller tries to release a rwlock that is write held, but not by the caller.
1.4	21-Sep-2007	ad	pthread_rwlock_unlock - Allow callers to try and release an unheld rwlock. Just return EPERM as mandated by IEEE Std 1003.1. - Use pthread__atomic_swap_ptr() to set in the new lock value. At this point the lock word can't have changed. pthread__rwlock_wrlock, pthread__rwlock_rdlock: - Mask out the waiter bits in the lock word before checking to see if the current thread is about to lock against itself.
1.3	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.2	08-Sep-2007	ad	branches: 1.2.2; - Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.1	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.2.2.2	10-Sep-2007	skrll	Sync with HEAD.
1.2.2.1	08-Sep-2007	skrll	file pthread_rwlock2.c was added on branch nick-csl-alignment on 2007-09-10 10:54:08 +0000
1.5.2.4	23-Mar-2008	matt	sync with HEAD
1.5.2.3	09-Jan-2008	matt	sync with HEAD
1.5.2.2	06-Nov-2007	matt	sync with HEAD
1.5.2.1	21-Sep-2007	matt	file pthread_rwlock2.c was added on branch matt-armv6 on 2007-11-06 23:11:44 +0000
1.7	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.6	04-May-2008	martin	branches: 1.6.8; Move TNF licenses to 2 clause form
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	04-Jul-2003	wiz	Fix SEE ALSO.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.6.8.1	04-May-2008	martin	file pthread_rwlock_destroy.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.10	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.9	20-May-2010	jruoho	Note the initializer macros.
1.8	04-May-2008	martin	branches: 1.8.8; Move TNF licenses to 2 clause form
1.7	17-Jun-2005	wiz	branches: 1.7.20; New sentence, new line.
1.6	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.5	04-Jul-2003	wiz	branches: 1.5.6; Fix typo.
1.4	04-Jul-2003	wiz	Sort sections.
1.3	04-Jul-2003	wiz	Fix SEE ALSO.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.5.6.1	22-Mar-2005	tron	Pull up revision 1.6 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.7.20.1	18-May-2008	yamt	sync with head.
1.8.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.8.8.1	04-May-2008	martin	file pthread_rwlock_init.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.11	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.10	04-May-2008	martin	branches: 1.10.8; Move TNF licenses to 2 clause form
1.9	17-Jun-2005	wiz	branches: 1.9.20; New sentence, new line.
1.8	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.7	04-Jul-2003	wiz	branches: 1.7.6; Add comma.
1.6	04-Jul-2003	wiz	Remove superfluous word.
1.5	04-Jul-2003	wiz	Fix SEE ALSO.
1.4	04-Jul-2003	wiz	Drop trailing whitespace.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.7.6.1	22-Mar-2005	tron	Pull up revision 1.8 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.9.20.1	18-May-2008	yamt	sync with head.
1.10.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.10.8.1	04-May-2008	martin	file pthread_rwlock_rdlock.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.8	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.7	04-May-2008	martin	branches: 1.7.8; Move TNF licenses to 2 clause form
1.6	17-Jun-2005	wiz	branches: 1.6.20; New sentence, new line.
1.5	04-Jul-2003	wiz	Fix SEE ALSO.
1.4	04-Jul-2003	wiz	Drop trailing whitespace.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.6.20.1	18-May-2008	yamt	sync with head.
1.7.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.7.8.1	04-May-2008	martin	file pthread_rwlock_unlock.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.9	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.8	04-May-2008	martin	branches: 1.8.8; Move TNF licenses to 2 clause form
1.7	17-Jun-2005	wiz	branches: 1.7.20; New sentence, new line.
1.6	21-Mar-2005	kleink	Add restrict qualifiers to <pthread.h> function arguments.
1.5	04-Jul-2003	wiz	branches: 1.5.6; Remove superfluous word.
1.4	04-Jul-2003	wiz	Fix SEE ALSO.
1.3	04-Jul-2003	wiz	Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.5.6.1	22-Mar-2005	tron	Pull up revision 1.6 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.7.20.1	18-May-2008	yamt	sync with head.
1.8.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.8.8.1	04-May-2008	martin	file pthread_rwlock_wrlock.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.11	10-Feb-2025	riastradh	libpthread: Say `restrict', not `__restrict', in man pages. The private macro __restrict exists only to make .h files work with legacy C/C++ versions without support for the `restrict' keyword. It's only distracting to use in a man page.
1.10	05-Jul-2016	wiz	branches: 1.10.28; Fix some lint. Too much or too little whitespace; improve macro usage; add missing .El; merge error sections for same error code.
1.9	03-Jul-2016	christos	GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.8	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.7	04-May-2008	martin	branches: 1.7.8; Move TNF licenses to 2 clause form
1.6	17-Jun-2005	wiz	branches: 1.6.20; New sentence, new line.
1.5	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4	04-Jul-2003	wiz	branches: 1.4.4; 1.4.6; Drop trailing whitespace.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.4.6.1	18-Jun-2005	tron	Pull up revision 1.5 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.4.4.1	21-Jun-2005	riz	Pull up revision 1.5 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.6.20.1	18-May-2008	yamt	sync with head.
1.7.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.7.8.1	04-May-2008	martin	file pthread_rwlockattr.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.10.28.1	02-Aug-2025	perseant	Sync with HEAD
1.40	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.39	06-Feb-2007	ad	Build without sys/sa.h present.
1.38	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.37	17-Mar-2005	jwise	branches: 1.37.4; 1.37.6; Lint warning police -- don't use `//' for comments in C code.
1.36	06-Jan-2005	mycroft	Fix a pasto.
1.35	06-Jan-2005	mycroft	Add some additional assertions and debugging printf()s.
1.34	06-Jan-2005	mycroft	Use TIMER_RELTIME rather than the constant 0 in one place.
1.33	12-Oct-2004	mycroft	Remove pt_blockuc. If the debugger attempts to muck with the state of a blocked thread, return an error; this should be done through ptrace(2).
1.32	20-Jul-2004	he	Cast result of pthread__uc_pc() via intptr_t before using as a pointer. Fixes compile problem for evbsh5.
1.31	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.30	14-Mar-2004	cl	add libpthread part of concurrency support for SA on MP systems - enable concurrency according to environment variable PTHREAD_CONCURRENCY - add idle VP wakeup if there are additional jobs and idle VPs - make reidlequeue per VP - enable spinning for locks - fix race condition in alarm processing - fix race condition in mutex locking - make debugging output line buffered and add VP prefix to debug lines
1.29	24-Feb-2004	wiz	Spell interrupt with two rs. From Peter Postma.
1.28	24-Feb-2004	wiz	occured -> occurred. From Peter Postma.
1.27	16-Jan-2004	cl	- delay making a thread unblocked until it's put on the runqueue. - simplify handling of blocked idle threads. This should fix the ``assertion "target->pt_state != PT_STATE_RUNNING \|\| target->pt_blockgen != target->pt_unblockgen" failed'' problem reported by Marc Recht and Steve Bellovin on current-users. Also g/c unused pthread__sched_bulk call left over from pthread_sa.c rev. 1.22 change.
1.26	02-Jan-2004	cl	userland part of no-syscall upcall stack return - add pt_stackinfo to struct __pthread_st - add pthread__stackinfo_offset returning the offset from ss_sp to pt_stackinfo - pass stackinfo_offset to sa_register and set SA_FLAG_STACKINFO to make the kernel use it - call pthread__sa_recycle in pthread__resolve_locks; g/c recycleq and pthread__recycle_bulk - return stack in pthread__sa_recycle by incrementing sasi_stackgen - make pthread__sa_recycle debugging output formatting conditional on pthread__debug_newline
1.25	02-Jan-2004	cl	- libc.so.12.109 and libpthread.so.0.4 - add ssize_t stackinfo_offset argument to sa_register syscall - remove sa_unblockyield syscall - make __sigprocmask14 syscall weak - in pthread__sa_start: catch up with 4-argument sa_register syscall
1.24	02-Jan-2004	cl	pthread__upcall: output LWPid in SA_UPCALL_BLOCKED case
1.23	02-Jan-2004	cl	logging/debugging changes: - add PTHREAD_PID_DEBUG which prints the pid before each debuglog line - output thread returned in pthread__next - add asserts in pthread__sched akin to asserts in pthread__sched_bulk: check if scheduled thread is at front/end of queue - pthread__upcall: output event/interrupted LWP count instead of LWPid of the first event/interrupted LWP (since unblock upcalls can have multiple event LWPs). - pthread__find_interrupted: output LWPid here
1.22	31-Dec-2003	cl	Handle block/unblock for threads in critical section without sa_unblockyield. XXX g/c sa_unblockyield in kernel later
1.21	17-Nov-2003	cl	- delay processing unblocked threads until after locks are resolved: without the blocked/unblocked upcall ordering, an interrupted blocked upcall might put the blocked thread on the intqueue because it needs to be continued. With the delayed processing, we avoid putting such a thread twice on the runqueue. - fix putting a thread on the intqueue when it needs to be continued after it blocked. Also check return value when returning a single stack.
1.20	12-Nov-2003	cl	check deferred signals for all unblocked threads
1.19	29-Oct-2003	cl	remove incorrect assert: regular threads can block in the kernel while holding (libpthread) locks and have to be continued XXX if the blocked upcall is preempted, the blocked threads syscall XXX return value can get lost
1.18	24-Oct-2003	yamt	update a comment.
1.17	29-Sep-2003	wiz	available, not avaliable. From miod@openbsd.
1.16	16-Sep-2003	cl	fix SA/pthread pagefault failure: - prevent BLOCKED upcalls on double page faults and during upcalls - make libpthread handle blocked threads which hold locks - prevent UNBLOCKED upcalls from overtaking their BLOCKED upcall this adds a new syscall sa_unblockyield see also http://mail-index.netbsd.org/tech-kern/2003/09/15/0020.html
1.15	12-Sep-2003	christos	convert to use siginfo/ucontext style of signal delivery instead of sigcontext. Approved by nathanw.
1.14	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.13	21-Jul-2003	nathanw	Lock accesses to pt_flags and pt_cancel. When disabling cancellation, clear the pt_cancel flag if it was set and note the cancellation request with PT_FLAG_CS_PENDING. This avoids a problem where a cancellation request entered but not acted upon before pthread_setcanclstate(PTHREAD_CANCEL_DISABLE) is called would still be aceted upon before cancellation was re-enabled.
1.12	26-Jun-2003	nathanw	Adapt to pt_trapuc: Store context obtained from upcalls there, clear it in switchto targets and vitims, and print it in debug messages (including indication of whether a context is trap or user context). Remove obsolete pt_sleepuc handling.
1.11	25-Jun-2003	nathanw	Complain clearly if SA syscalls aren't avaliable.
1.10	12-Jun-2003	nathanw	In pthread__resolve_locks(), change the conditions for removing a normal thread from the continuation chain: Not only must it have released all spinlocks, but it must have signaled completion by finishing pthread__switch or by having stored into pt_switchto. Together with the previous pthread_switch.S changes, this fixes a couple of crasehes caused by race conditions in the examination and use of pt_next, and by switching to empty pt_switchtouc's.
1.9	27-May-2003	christos	pass lint: 1. add new pthread__abort() and change pthread_assert(0) to it. 2. put constcond in the right place (in the macro). 3. no space after pthread__assert macro.
1.8	26-May-2003	nathanw	* Recycle upcall stacks as soon as possible rather than waiting to accumulate half of the total number. There are too many ways for the SA subsystem to deadlock waiting for stacks that userland has no reason to recycle. * Consolidate switchto handling in pthread_resolve_locks(). * Add code to re-chain the preempting parents of switchtos. * Tweak debuglog output in a couple of cases.
1.7	08-Mar-2003	lukem	add __RCSID()
1.6	15-Feb-2003	nathanw	Adapt to pthread__assert() and remove local debug toggle.
1.5	30-Jan-2003	nathanw	Simplify pthread__upcall() a bit by moving lock resolution before the big switch statement, and moving upcall-type-specific code into that switch. Beneficial side effect: don't manipulate a statelock before lock resolution occurs.
1.4	25-Jan-2003	nathanw	More signal rearranging: - Signal handlers now simply continue executing the current thread, rather than trying to put themselves back on the queue that they came from, which was rather fragile. As a result, all callers of pthread__block() must be prepared to handle spurious wakeups. - When a signal arrives for a thread that is blocked in the kernel, note this in another field in pthread_st and set a flag. Process the signal and set up the trampoline for the handler after the thread unblocks, so that both the trampoline and the returned state from the kernel are preserved. - Factor out some code into a pthread__deliver_signal() routine; the signal-taking code in pthread_sigmask() should be able to use this soon. This is still gross, and there are still some terrible MP issues lurking here, but progress crawls along.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_sa.c was initially added on branch nathanw_sa.
1.1.2.37	14-Jan-2003	nathanw	Clear _UC_SIGMASK from a thread's ucontext; the pthread library has no desire to reset the sigmask in a setcontext() call.
1.1.2.36	02-Jan-2003	nathanw	Clean up the namespace a bit; make a few more things static, and make sure all private globals are prefixed with pthread__.
1.1.2.35	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.34	16-Dec-2002	nathanw	Don't let pthread__sched_idle2 operate on a thread that's part of a interrupted chain (pt_next != NULL). Clear pt_next when removing an idle thread from the chain.
1.1.2.33	11-Dec-2002	martin	Adapt to siginfo changes - hope this is right, someone please sanit check it!
1.1.2.32	01-Nov-2002	thorpej	* Default to a 100mS round-robin timer; there are a great many applications that assume concurrency even on a uniprocessor. (These applications are, of course, broken, but there's not much we can do about it.) * Add pthread_getrrtimer_np() and pthread_setrrtimer_np() functions which provide access to the round-robin timer to application programs. Setting the rrtimer to 0 will disable timeslicing. Per discussion with Loren Rittle (on libstdc++@gcc.gnu.org) and Nathan Williams (privately). The 100mS default interval is chosen because timeslicing is largely for user-visible parallelism, and the 100mS interval results in less overhead while still providing a reasonable amount of user-visible parallelism.
1.1.2.31	29-Oct-2002	nathanw	Add a note about why PT_RRTIMER_MAGIC doesn't need explicit handling in sa_upcall(). Fix a couple of err() calls that should be errx().
1.1.2.30	22-Oct-2002	nathanw	Run the alarm queue after spinlock resolution, since alarm handling uses locks.
1.1.2.29	21-Oct-2002	nathanw	Debug-count sigev upcalls. A little whitespace fiddling.
1.1.2.28	21-Oct-2002	nathanw	Implement a somewhat crude forced round-robin scheduling option, enabled by setting PTHREAD_RRTIME to the number of milliseconds between timer events. Makes use of CLOCK_VIRTUAL POSIX timers.
1.1.2.27	16-Oct-2002	nathanw	Track the largest LWP we've seen, to aid debuggers. (XXX probably better handled with a ptrace query, but that will require more careful consideration)
1.1.2.26	31-Aug-2002	nathanw	Adapt to the flag argument for sa_register. If the environment variable PTHREAD_PREEMPT (possiboly a poor choice if name) is set, then set the flag that requests upcalls whenever a kernel preempt() event happens. Defaults to off, as this can lead to upcall stack exhaustion in some pathalogical cases.
1.1.2.25	20-May-2002	nathanw	Set upcall thread state to running upon entering the upcall handler. Paranoia: remove an upcall from the normal queue before putting it on the recycle queue. Reset the next/parent/state fields of an upcall in pthread__sa_recycle(). Lots of whitespace and comment tweaks.
1.1.2.24	24-Apr-2002	nathanw	Track "Running" state. Help create thread IDs. Stash the context pointer of blocked threads so that a debugger can backtrace it.
1.1.2.23	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.22	19-Feb-2002	nathanw	Only run the alarm queue when the siginfo_t has the right magic number. Run signals after putting resolved threads back on their queues so that signal handling doesn't have to deal with threads that aren't on any queue at all.
1.1.2.21	13-Feb-2002	nathanw	In pthread__find_interrupted(), keep idle threads that have set PT_FLAG_IDLED and that don't need lock resolution off of the resumption queue. Prevents mangling of the idle queue and losing threads in certain situations.
1.1.2.20	13-Feb-2002	nathanw	Change resumecount to just resume, and don't bother counting threads that need resumption handling, just whether or not there are any.
1.1.2.19	08-Feb-2002	nathanw	Properly handle idle threads in pthread__resolve_locks(). As always, add some more debugging.
1.1.2.18	08-Feb-2002	nathanw	pthread__resolve_locks(): Make sure that upcalls on the interrupted queue update the next pointer, so that they're on the queue for the next pass if there are non-upcalls later in the queue.
1.1.2.17	08-Feb-2002	nathanw	Make pthread__upcall() non-static; it didn't really serve any purpose for it to be static, and made debugging more annoying. Wrap counters in #ifdef PTHREAD__DEBUG, so that libpthread builds when that's not defined. Add a little bit of debugging information.
1.1.2.16	28-Jan-2002	nathanw	Add SA_SIGEV handling for the alarm queue. Adjust for cancellation-oriented thread state management.
1.1.2.15	02-Jan-2002	nathanw	Work around the fact that the sa_enable() syscall doesn't really return from the kernel, but is continued by being jumped to from an upcall, which can result in stuffing a bogus value into errno. Fixes errno1 test on i386, and possibly elsewhere.
1.1.2.14	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t. pt_queue_t -> pthread_queue_t.
1.1.2.13	17-Nov-2001	nathanw	Update for new signal interface.
1.1.2.12	14-Nov-2001	briggs	Add pthread__uc_pc() to pthread_md.h instead of making assumptions about the contents of the m.d. mcontext.
1.1.2.11	25-Sep-2001	nathanw	A few more asserts and debuglog entries.
1.1.2.10	01-Aug-2001	nathanw	Add some debugging framework I've been using a lot (can easily be compiled out). Bugfix 1: In the new_preempt case, it is possible for victim and switchto to point to the same thing. Don't but one thread on the runqueue twice when this happens. Bugfix 2 (along with changes to pthread_switch.S and pthread_int.h): Restore the useful ucontext of a thread that is preempted on the original stack in pthread__locked_switch().
1.1.2.9	31-Jul-2001	nathanw	Clear pt_next and pt_parent for threads that had been making locked switches.
1.1.2.8	31-Jul-2001	nathanw	It is no longer necessary that a switchto's pt_next and pt_parent be NULL. In fact, they will often not be null: a thread that hits a new_preempt case in pthread__locked_switch() or pthread__upcall_switch() will have itself as its switchto victim.
1.1.2.7	26-Jul-2001	nathanw	pthread__switch() no longer needs to be implemeted in assembler, and doesn't have a lock parameter.
1.1.2.6	24-Jul-2001	nathanw	Add an assert() after a /* NOTREACHED */.
1.1.2.5	19-Jul-2001	nathanw	Make an effort to recycle idle threads on every upcall. Remove some obsolete debugging code.
1.1.2.4	13-Jul-2001	nathanw	Remove obsolete debugging code.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Convert to new queue type.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.37.6.5	04-Jan-2008	wrstuden	Add preliminary support for a SA_UPCALL_USER to notice pending signals. Not fully tested yet as we don't send them.
1.37.6.4	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.37.6.3	25-Sep-2007	wrstuden	In preparation for sending ourselves upcalls, keep track of them (give them a counter) and don't consider receiving one of them an error.
1.37.6.2	25-Sep-2007	wrstuden	Rename pt_blockedlwp to pt_lastlwp, and set it whenever we switch to a new pthread. This way we always know on what lwp a given thread is running.
1.37.6.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.37.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.8	03-Jul-2017	wiz	Remove workaround for ancient HTML generation code.
1.7	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.6	07-Jul-2010	jruoho	Xref pthread_attr_getschedparam(3) and sched(3). Use a list for clarity.
1.5	04-May-2008	martin	branches: 1.5.8; Move TNF licenses to 2 clause form
1.4	21-Mar-2005	kleink	branches: 1.4.20; Add restrict qualifiers to <pthread.h> function arguments.
1.3	04-Jul-2003	wiz	branches: 1.3.6; > -> \*[Gt]
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.6.1	22-Mar-2005	tron	Pull up revision 1.4 (requested by kleink in ticket #46): Add restrict qualifiers to <pthread.h> function arguments.
1.4.20.1	18-May-2008	yamt	sync with head.
1.5.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.5.8.1	04-May-2008	martin	file pthread_schedparam.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.5	23-Oct-2017	wiz	Remove superfluous Tn.
1.4	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_self.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.5	09-Jul-2010	jruoho	Rationalize by moving pthread_attr_setname_np(3) to pthread_attr_getname_np(3); and pthread_setname_np(3) to pthread_getname_np(3).
1.4	07-Jul-2010	wiz	Sort sections.
1.3	06-Jul-2010	jruoho	Fix LIBRARY. Add ERRORS and COMPATIBILITY. And some small improvements.
1.2	26-May-2008	wiz	branches: 1.2.6; Remove trailing whitespace.
1.1	14-Dec-2007	yamt	branches: 1.1.2; 1.1.6; 1.1.8; document following functions. pthread_attr_getname_np pthread_attr_setname_np pthread_getname_np pthread_setname_np
1.1.8.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.1.6.1	04-Jun-2008	yamt	sync with head
1.1.2.2	09-Jan-2008	matt	sync with HEAD
1.1.2.1	14-Dec-2007	matt	file pthread_setname_np.3 was added on branch matt-armv6 on 2008-01-09 01:36:39 +0000
1.2.6.2	26-May-2008	wiz	Remove trailing whitespace.
1.2.6.1	26-May-2008	wiz	file pthread_setname_np.3 was added on branch christos-time_t on 2008-05-26 08:43:42 +0000
1.4	09-Jul-2010	jruoho	Rationalize by moving pthread_key_delete(3) to pthread_key_create(3); and pthread_setspecific(3) to pthread_getspecific(3)
1.3	02-May-2008	martin	branches: 1.3.8; Move TNF licenses to 2 clause form
1.2	08-Jun-2003	thorpej	branches: 1.2.32; $NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	02-May-2008	martin	Move TNF licenses to 2 clause form
1.3.8.1	02-May-2008	martin	file pthread_setspecific.3 was added on branch christos-time_t on 2008-05-02 18:11:05 +0000
1.50	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.49	22-Jan-2007	christos	Add another volatile, mentioned in current-users from a cross-build on amd64.
1.48	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.47	24-Nov-2006	christos	branches: 1.47.2; 1.47.4; fix spelling of accommodate; from Zapher.
1.46	12-Jun-2006	chuck	sigtimedwait: if we collect a queued signal via pt_siglist, do not forget to clear it out of pt_siglist, otherwise we will keep getting it over and over again. fixes a problem introduced in rev 1.43. problem observed with mysqld where sending it a SIGHUP after it has set an alarm (e.g. due to some package like rt3 using it) caused the signal handler thread to go into a tight loop (collecting a SIGALRM [via sigwait() in mysqld.cc] that would not go away due to the above issue). mysqld appears to get a SIGHUP when /etc/rc exits, so it can go into this tight loop after a reboot (but not if you restart it by hand). the bad sequence is: /etc/rc runs: - starts mysqld - starts web server with rt3 fastcgi starts - fastcgi/rt3 talks to mysqld (causing it to set an alarm) - /etc/rc exits, SIGHUP goes to mysqld - mysqld catches SIGHUP, signal handler thread gets stuck in loop (database continues to operate, slowly). you can also trigger the problem by sending mysqld a SIGHUP by hand after you've caused it to set an alarm by connecting to it.
1.45	24-Apr-2006	snj	It's "its."
1.44	16-Oct-2005	chs	in pthread_kill() and pthread_suspend_np(), return without doing anything if the target thread is a zombie. in all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). clean up some debugging stuff.
1.43	16-Oct-2005	chs	fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. fixes PR 30348.
1.42	13-Sep-2005	christos	XXX: Work around libpthread's "intimate" connection with libc.
1.41	26-Jul-2005	christos	Revert part of previous; we need to merge acts.sa_mask into our pthread mask. Thanks martin...
1.40	26-Jul-2005	christos	- removed bogus acts.sa_mask setting. - unblock the signal we are currently delivering, because it might have been blocked if we are woken up by another thread.
1.39	27-Feb-2005	nathanw	branches: 1.39.2; Correct the order of arguments to __sigplusset() in two places to correct the signal mask experienced by signal handlers in threaded programs. Fixes regress/lib/libpthread/sigmask3.
1.38	26-Feb-2005	nathanw	Keep the kernel updated with signal action signal masks (act.sa_mask) until threads are started, since before that the traditional signal invocation method will be used. Fixes regress/lib/libpthread/sigmask2.
1.37	26-Feb-2005	nathanw	Fetch the old signal mask for the signal action whether or not we're setting a new signal action; this makes sigaction(sig, NULL, &oact) return a sensible value in the signal mask instead of stack trash. Addresses PR lib/29536. XXX the mask seen by signal handlers in a program linked with libpthread but not yet multithreaded will not reflect masks set here.
1.36	24-Aug-2004	nathanw	Mark when a thread has taken a signal.
1.35	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.34	24-Mar-2004	lha	Fix a problem where pthread_kill can set a signal while the process have the signal blocked, this ends up making target thread getting later stuck in a loop if it uses pthread_sigmask. ok, cl and christos
1.33	02-Jan-2004	cl	make siglongjmp out of a signal handler work: - strong alias __sigprocmask14 to pthread_sigmask - call _sys___sigprocmask14 where appropriate - make pthread_sigmask not set the signal mask lazily when pthreads aren't started yet
1.32	31-Dec-2003	cl	Handle block/unblock for threads in critical section without sa_unblockyield. XXX g/c sa_unblockyield in kernel later
1.31	25-Nov-2003	cl	Save the old mask in the old context, not in the new one.
1.30	25-Nov-2003	cl	Honor SA_NODEFER in pthread__deliver_signal(). This should help code which makes a longjmp out of a signal handler. Also add missing si_code argument to debugging printf in pthread__kill().
1.29	25-Nov-2003	christos	GC sigcontext<->mcontext code and __HAVE_SIGINFO. All supported archs have siginfo implemented.
1.28	25-Nov-2003	christos	- don't store sigmask on the stack, we could store it in the right place [in the context] - this has the side effect of fixing the problem of the signal mask not being preserved properly upon signal return, found and fixed by cl. - add si_code to the tramp debugging output (requested by cl).
1.27	20-Nov-2003	uwe	Follow-up to previous. In pthread__signal_tramp() maskp is below siginfo on the stack, so get it from there. ss_sp no longer points to the the mask. Pointed out by cl@.
1.26	20-Nov-2003	uwe	Undo previous. In pthread__deliver_signal set uc->uc_stack.ss_sp = uc; (as it used to be before 1.1.2.12) so that makecontext doesn't stomp on the data we allocated on the stack. Correct the debugging printf to print olduc instead of target->pt_uc (we have pt_trapuc now, and olduc can be pt_trapuc).
1.25	20-Nov-2003	yamt	pthread__deliver_signal: swap oldmask and siginfo so that signal handler's stack doesn't stomp siginfo. this also fixes !__HAVE_SIGINFO, in that case pthread__signal_tramp assumes uc->uc_stack.ss_sp points the old signal mask. pointed by uwe@.
1.24	09-Nov-2003	christos	Add: int pthread_attr_setcreatesuspend_np(pthread_attr_t *); int pthread_suspend_np(pthread_t); int pthread_resume_np(pthread_t); needed for java. Approved and fixed by cl.
1.23	16-Oct-2003	yamt	in pthread__deliver_signal(), copy siginfo_t into the stack of the target thread rather than relying on the luck that on-stack siginfo_t stay valid.
1.22	13-Sep-2003	christos	fix syntax; thanks aymeric
1.21	13-Sep-2003	christos	explicitly use a sigset_t * variable to recover the signal mask pointer.
1.20	12-Sep-2003	drochner	make it compile with PTHREAD_SIG_DEBUG again
1.19	12-Sep-2003	kleink	Fix pasto in previous.
1.18	12-Sep-2003	christos	convert to use siginfo/ucontext style of signal delivery instead of sigcontext. Approved by nathanw.
1.17	22-Aug-2003	nathanw	In pthread__deliver_signal(), correctly use pt_trapuc or pt_uc as the context-to-restore instead of always using pt_uc. Fixes a problem with signal handlers for synchronous signals noted by Matthias Drochner on current-users.
1.16	21-Jul-2003	nathanw	Lock accesses to pt_flags and pt_cancel. When disabling cancellation, clear the pt_cancel flag if it was set and note the cancellation request with PT_FLAG_CS_PENDING. This avoids a problem where a cancellation request entered but not acted upon before pthread_setcanclstate(PTHREAD_CANCEL_DISABLE) is called would still be aceted upon before cancellation was re-enabled.
1.15	17-Jul-2003	fvdl	Take the normal return path in sigtimedwait when the current thread was canceled as well. From Stephan Uphoff.
1.14	27-May-2003	christos	pass lint: 1. add new pthread__abort() and change pthread_assert(0) to it. 2. put constcond in the right place (in the macro). 3. no space after pthread__assert macro.
1.13	20-Mar-2003	nathanw	Use pthread__assert() instead of plain assert(), as the latter has locking issues.
1.12	14-Mar-2003	nathanw	Add a wrapper for the execve() system call that arranges for the current thread sigal mask to be propagated into the new process image.
1.11	08-Mar-2003	lukem	add __RCSID()
1.10	28-Feb-2003	lha	If pthreads hasn't started yet when calling sigsuspend, use the systemcall
1.9	15-Feb-2003	jdolecek	interposition sigtimedwait() with a thread-aware version, which uses single proxy thread to do the actual syscall, and blocks other threads in userland
1.8	15-Feb-2003	nathanw	Move debug toggle to pthread_debug.h.
1.7	30-Jan-2003	nathanw	More rototilling: * Implement pthread_kill(). * Return the old thread mask, not the old process mask, in our interpositioned sigaction call. * Refer to _NSIG, not NSIG. * Gut pthread_sigmask(). It was handling a lot of corner cases that weren't legal anyway. Handle unblocked signals with a new pthread__kill_self() routine (also used by pthread_kill()). * Be more consistent with locking around pt_sigacts[].
1.6	28-Jan-2003	jdolecek	__sigaction14(): sanity check 'sig' before use, same way as sigaction1() in kernel
1.5	25-Jan-2003	nathanw	More signal rearranging: - Signal handlers now simply continue executing the current thread, rather than trying to put themselves back on the queue that they came from, which was rather fragile. As a result, all callers of pthread__block() must be prepared to handle spurious wakeups. - When a signal arrives for a thread that is blocked in the kernel, note this in another field in pthread_st and set a flag. Process the signal and set up the trampoline for the handler after the thread unblocks, so that both the trampoline and the returned state from the kernel are preserved. - Factor out some code into a pthread__deliver_signal() routine; the signal-taking code in pthread_sigmask() should be able to use this soon. This is still gross, and there are still some terrible MP issues lurking here, but progress crawls along.
1.4	24-Jan-2003	jdolecek	unlock pt_statelock _after_ changing pt_state, not before problem found and fix suggested by Nick Hudson
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_sig.c was initially added on branch nathanw_sa.
1.1.2.28	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.27	14-Jan-2003	nathanw	Subtract off STACKSPACE before using space on the victim's stack. Overwriting the contents of STACKSPACE with a signal mask has bad side effects.
1.1.2.26	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.25	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.24	03-Jan-2003	nathanw	Silent failures are annoying. Sprinkle some assert(0) after NOTREACHED points.
1.1.2.23	02-Jan-2003	nathanw	Clean up the namespace a bit; make a few more things static, and make sure all private globals are prefixed with pthread__.
1.1.2.22	20-Dec-2002	thorpej	Include <stdint.h> to ensure we have uintptr_t.
1.1.2.21	19-Dec-2002	thorpej	If _UC_UCONTEXT_ALIGN is defined, use it to align the ucontext_t that is used to provide the signal delivery context. (This is only needed because we're using our own userland versions of the context routines; this is not needed if we use the kernel versions of the routines...)
1.1.2.20	02-Nov-2002	nathanw	In pthread_sigmask(), be careful to only unlock the spinlocks that were locked.
1.1.2.19	27-Oct-2002	thorpej	Cosmetic changes.
1.1.2.18	22-Oct-2002	nathanw	Use _INITCONTEXT_U() instead of _getucontext_u() to prime a fresh context.
1.1.2.17	16-Oct-2002	nathanw	In pthread__signal(), lock the pt_siglock of a directly-targeted thread.
1.1.2.16	14-Oct-2002	nathanw	Oops, correct typos in previous.
1.1.2.15	14-Oct-2002	nathanw	Explicitly clear the UC_USER bit from uc_flags after calling _getcontext_u() if we're going to call makecontext(), because makecontext() needs to affect registers other than the caller-save regs.
1.1.2.14	02-Oct-2002	thorpej	libc: Internally rename __sigaction14 to __libc_sigaction14. Provide a weak alias of __sigaction14 -> __libc_sigaction14. libpthread: Use __libc_sigaction14 to actually register the signal handler, rather than using __sigaction_sigtramp() directly with a hard-coded trampoline version. While we don't actually use the libc trampoline, we want to avoid depending on any COMPAT_* kernel options down the road (this is already the case for the VAX port). Be explicit about which version of the signal interface we're interposing (...14), and build pthread_sig.c with __LIBC12_SOURCE__ (required to get the libc-internal interfaces).
1.1.2.13	02-Aug-2002	nathanw	Adapt to new syscall stubs for sigaction override. Use SIGCATCH flag instead of special-casing the sigsuspended queue.
1.1.2.12	20-May-2002	nathanw	Many signal improvements: - Implement sigsuspend() - Take pending signals that are unblocked in pthread_sigmask(). - Tweak the signal mask passed by sigaction() to permit us to manage our own thread-specific signal masks. - Don't try to deliver signals to zombie threads. - Prevent a race between deciding a thread can take a signal and actually taking it. - Don't put threads that are blocked in a syscall on the run queue. - Add debug logging.
1.1.2.11	24-Apr-2002	nathanw	Track "Running" state.
1.1.2.10	11-Apr-2002	nathanw	Revert weak aliases.
1.1.2.9	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.8	19-Feb-2002	nathanw	Carefully lock queues when manipulating threads taking signals. Handle signals beling delivered to queie-locked threads.
1.1.2.7	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t.
1.1.2.6	26-Nov-2001	nathanw	Whitespace cleanup (including removal of some weird one-column indents).
1.1.2.5	17-Nov-2001	nathanw	Clean up and update for new signal interface.
1.1.2.4	25-Sep-2001	nathanw	Comment more verbosely and correctly. Set the size of the stack-adjust better.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Convert to new queue type.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.39.2.4	13-Jun-2006	tron	Pull up following revision(s) (requested by chuck in ticket #1376): lib/libpthread/pthread_sig.c: revision 1.46 sigtimedwait: if we collect a queued signal via pt_siglist, do not forget to clear it out of pt_siglist, otherwise we will keep getting it over and over again. fixes a problem introduced in rev 1.43. problem observed with mysqld where sending it a SIGHUP after it has set an alarm (e.g. due to some package like rt3 using it) caused the signal handler thread to go into a tight loop (collecting a SIGALRM [via sigwait() in mysqld.cc] that would not go away due to the above issue). mysqld appears to get a SIGHUP when /etc/rc exits, so it can go into this tight loop after a reboot (but not if you restart it by hand). the bad sequence is: /etc/rc runs: - starts mysqld - starts web server with rt3 fastcgi starts - fastcgi/rt3 talks to mysqld (causing it to set an alarm) - /etc/rc exits, SIGHUP goes to mysqld - mysqld catches SIGHUP, signal handler thread gets stuck in loop (database continues to operate, slowly). you can also trigger the problem by sending mysqld a SIGHUP by hand after you've caused it to set an alarm by connecting to it.
1.39.2.3	01-Nov-2005	jmc	branches: 1.39.2.3.2; Pullup revs 1.43-1.44 (requested by chs in ticket #926) In pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. PR#20256, PR#24241, PR#25722, PR#26096 Fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. PR#30348 In pthread_kill() and pthread_suspend_np(), return without doing anything f the target thread is a zombie. In all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). Starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. If mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.39.2.2	12-Aug-2005	snj	Pull up revision 1.41 (requested by christos in ticket #642): Revert part of previous; we need to merge acts.sa_mask into our pthread mask. Thanks martin...
1.39.2.1	12-Aug-2005	snj	Pull up revision 1.40 (requested by christos in ticket #642): - removed bogus acts.sa_mask setting. - unblock the signal we are currently delivering, because it might have been blocked if we are woken up by another thread.
1.39.2.3.2.1	13-Jun-2006	tron	Pull up following revision(s) (requested by chuck in ticket #1376): lib/libpthread/pthread_sig.c: revision 1.46 sigtimedwait: if we collect a queued signal via pt_siglist, do not forget to clear it out of pt_siglist, otherwise we will keep getting it over and over again. fixes a problem introduced in rev 1.43. problem observed with mysqld where sending it a SIGHUP after it has set an alarm (e.g. due to some package like rt3 using it) caused the signal handler thread to go into a tight loop (collecting a SIGALRM [via sigwait() in mysqld.cc] that would not go away due to the above issue). mysqld appears to get a SIGHUP when /etc/rc exits, so it can go into this tight loop after a reboot (but not if you restart it by hand). the bad sequence is: /etc/rc runs: - starts mysqld - starts web server with rt3 fastcgi starts - fastcgi/rt3 talks to mysqld (causing it to set an alarm) - /etc/rc exits, SIGHUP goes to mysqld - mysqld catches SIGHUP, signal handler thread gets stuck in loop (database continues to operate, slowly). you can also trigger the problem by sending mysqld a SIGHUP by hand after you've caused it to set an alarm by connecting to it.
1.47.4.8	03-May-2008	wrstuden	pthread_kill() won't correctly deliver signals to a thread that is in sigwait() waiting for them. Problem is we need to kick the "master" waiter out of the kernel, and it has to correctly handle this. It either has to realize we now have a signal we were waiting for, or we have to ignore it (and keep waiting for other signals). Do it. Fixes PR kern/30348 even though it's totally a library bug.
1.47.4.7	04-Nov-2007	wrstuden	Add an #ifdef PTHREAD__DEBUG variable, __pthread_running_kills. Incriment it each time we kill a running thread. Will be used by a new regression test to verify the defsig code.
1.47.4.6	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.47.4.5	25-Sep-2007	wrstuden	Add code to handle delivering a signal to a running thread. At present, it only adds the signal to the blocked set for the thread. This change does not add support for the kernel preempting the thread. A minor detail is that the upcall handler doesn't handle it right yet. The main reason is so that we can test to see if the signal catching code that I recently sprinkled throught the library actually works right.
1.47.4.4	25-Sep-2007	wrstuden	Fix a comment about MP locking. Remove it and adapt the code to close a race window. Only grab the target's state lock at most once; don't lock it, release it, then lock it again. Remember if we locked it early.
1.47.4.3	25-Sep-2007	wrstuden	Rename pt_blockedlwp to pt_lastlwp, and set it whenever we switch to a new pthread. This way we always know on what lwp a given thread is running.
1.47.4.2	11-Sep-2007	wrstuden	While examining the target's state, grab the target's statelock, not our own.
1.47.4.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.47.2.3	10-Apr-2009	snj	Apply patch (requested by dholland in ticket #1301): In the pthreads wrapper for __sigaction14, return -1 and set errno rather than returning an error number directly like many pthreads functions do. Fixes a problem where sigaction(-1, ...) returns EINVAL instead of failing with EINVAL, reported by Matteo Beccati in PR lib/41085.
1.47.2.2	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.47.2.1	25-Sep-2007	xtraeme	Pull up following revision(s) (requested by wrstuden in ticket #892): lib/libpthread/pthread_sig.c: revision 1.47.4.2 While examining the target's state, grab the target's statelock, not our own.
1.9	09-Jul-2010	wiz	Mark up NULL.
1.8	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.7	04-May-2008	martin	branches: 1.7.8; Move TNF licenses to 2 clause form
1.6	07-Jan-2006	kleink	branches: 1.6.20; pthread_sigmask(): Add restrict qualifier to set, oset args.
1.5	30-Oct-2003	wiz	sigwait(2), not (3).
1.4	30-Oct-2003	jdolecek	bump date too
1.3	30-Oct-2003	jdolecek	xref sigwait(3)
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.6.20.1	18-May-2008	yamt	sync with head.
1.7.8.2	04-May-2008	martin	Move TNF licenses to 2 clause form
1.7.8.1	04-May-2008	martin	file pthread_sigmask.3 was added on branch christos-time_t on 2008-05-04 19:43:06 +0000
1.9	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.8	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.7	19-Apr-2005	nathanw	branches: 1.7.4; 1.7.6; Avoid passing along a timespec with a negative number of seconds if the current time plus the caller-supplied time to sleep wraps the time_t. Instead, sleep until INT_MAX.
1.6	06-Jan-2005	mycroft	branches: 1.6.2; gettimeofday();TIMEVAL_TO_TIMESPEC(); is exactly equivalent to clock_gettime(CLOCK_REALTIME), except the latter may have more preicison some day. So, use that.
1.5	24-Aug-2004	nathanw	In nanosleep(), loop until the timer fires or a signal is taken; other spurious wakeups (such as those caused by gdb) should not cause nanosleep to return prematurely.
1.4	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.3	24-Jun-2004	nathanw	If the sleep sleeps for its full time and rmtp is non-NULL, clear it; sleep(3) expects this, even though it's not a documented property of nanosleep(). Fixes a problem where sleep() in a threaded program would return nonzero even on success.
1.2	08-Mar-2003	lukem	branches: 1.2.4; add __RCSID()
1.1	15-Feb-2003	nathanw	Implement nanosleep() at userlevel. Threaded applications seem to like to sleep a lot, and there's no need for each such thread to consume kernel resources. (accidentally checked the pthread.c part of this in yesterday; no reason not to finish the job)
1.2.4.1	12-May-2005	riz	Pull up revision 1.7 (requested by nathanw in ticket #1443): Avoid passing along a timespec with a negative number of seconds if the current time plus the caller-supplied time to sleep wraps the time_t. Instead, sleep until INT_MAX.
1.6.2.1	21-Apr-2005	tron	Pull up revision 1.7 (requested by nathanw in ticket #181): Avoid passing along a timespec with a negative number of seconds if the current time plus the caller-supplied time to sleep wraps the time_t. Instead, sleep until INT_MAX.
1.7.6.2	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.7.6.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.7.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.28	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.27	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.26	21-Mar-2013	christos	- Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.25	06-Mar-2013	yamt	add assertions
1.24	21-Nov-2012	christos	Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads.
1.23	12-Sep-2012	matt	Only copy the ucontext_t in pthread_setcontext if _UC_TLSBASE is set. Conditionalize the test on _UC_TLSBASE being defined.
1.22	12-Sep-2012	manu	branches: 1.22.2; setcontext() used to be incompatible with -lpthread since it affected the TLS pointer, therefore wrecking the pthread environement. Some ports had _UC_TLSBASE flag or equivalent (_UC_UNIQUE on alpha) that controlled whether setcontext() would change the TLS pointer. This change let libpthread override setcontext() with its own version that unsets _UC_TLSBASE, enabling safe usage of setcontext() with -lpthread. We also have the following required changes here: - rename alpha's _UC_UNIQUE into _UC_TLSBASE - add _UC_TLSBASE definition in header file for all ports (powerpc, sh3, sparc and sparc64 lack the implementation for now) - introduce a libc stub that can be overriden for setcontext() - modify MD libcs swapcontext() implementations so that they use the setcontext() libc stub instead of doing a plain system call. While we are there: - document various MD _UC_* flags in header file - add libc and libpthread tests for swapcontext() behavior (hopefully helpful to spot MD problems introduced with this change) Future work: - Deciding whether kernel support or _UC_TLSBASE should be added for powerpc, sh3, sparc and sparc64 is left to portmasters sparc64 Approved by core@
1.21	23-Jun-2008	ad	branches: 1.21.2; 1.21.6; 1.21.22; pthread_curcpu_np: remove hack for pthread_dummy_lwpctl.
1.20	28-Apr-2008	martin	branches: 1.20.2; Remove clause 3 and 4 from TNF licenses
1.19	22-Mar-2008	ad	branches: 1.19.2; Back out previous. It seems to expose another bug in libpthread/libc, potentially errno being used before threading is up and running.
1.18	21-Mar-2008	ad	Move pthread__errno() into pthread_specific.c so it gets the "no stack frame" treatment.
1.17	08-Jan-2008	christos	cast -1 to unsigned int.
1.16	07-Jan-2008	yamt	pthread_curcpu_np: map LWPCTL_CPU_NONE to 0 so that this works in the case of _lwp_ctl failure.
1.15	07-Dec-2007	ad	Back out previous now that libc/libpthread are initialized first.
1.14	01-Dec-2007	ad	Hack around ld.so initializing pthread users before libpthread/libc.
1.13	27-Nov-2007	ad	Add thr_curcpu(), pthread_curcpu_np().
1.12	13-Nov-2007	ad	Cosmetic change.
1.11	16-Aug-2007	ad	branches: 1.11.2; - Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.10	13-Aug-2003	nathanw	branches: 1.10.20; Split out pthread_{set,get}specific() into a separate file and arrange for that file to not be built with profiling. This makes it reasonable to use pthread_{set,get}specific() to implement thread-safe profiline call counts.
1.9	17-Jul-2003	nathanw	Don't use PTHREAD_DESTRUCTOR_ITERATIONS; the constant is going away.
1.8	15-May-2003	wiz	Fix typo in comment.
1.7	15-May-2003	nathanw	Remove an unnecessary test in pthread_getspecific().
1.6	08-Mar-2003	lukem	add __RCSID()
1.5	15-Feb-2003	nathanw	Remove unused #include <assert.h>
1.4	21-Jan-2003	nathanw	Don't bother acquiring the tsd_lock and reading the destructor function if the corresponding TSD entry is empty. Cuts down lock/unlock pairs for this operation from 256 to the number of active TSD entries; sicne this is done when every thread exits, it saves many total lock/unlock pairs.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	08-Aug-2001	nathanw	branches: 1.1.2; file pthread_specific.c was initially added on branch nathanw_sa.
1.1.2.9	09-Jan-2003	thorpej	Remove trailing semicolon from __strong_alias().
1.1.2.8	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.7	07-Oct-2002	nathanw	Protect operations on the destructor array with mutexes. Add a lot of verbiage about how broken the specification of pthread_key_delete() is, and change the implementation to the least-damaging option: clearing the destructor and not permitting key reuse.
1.1.2.6	26-Apr-2002	nathanw	Make the names of the thread-specific data arrays visible.
1.1.2.5	11-Apr-2002	nathanw	Revert weak aliases.
1.1.2.4	25-Mar-2002	nathanw	Provide interfaces to libc.
1.1.2.3	01-Mar-2002	nathanw	Add a comment noting the dissent about what pthread_key_delete() should really do.
1.1.2.2	30-Dec-2001	nathanw	pt_spin_t -> pthread_spin_t.
1.1.2.1	08-Aug-2001	nathanw	Implement thread-specific data.
1.10.20.1	03-Sep-2007	skrll	Sync with HEAD.
1.11.2.2	23-Mar-2008	matt	sync with HEAD
1.11.2.1	09-Jan-2008	matt	sync with HEAD
1.19.2.1	18-May-2008	yamt	sync with head.
1.20.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.21.22.3	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.21.22.2	02-Dec-2012	riz	Back out ticket #724 (libpthread changes) until they can be better understood, as they broke threaded programs on (at least) i386 and amd64.
1.21.22.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #724): lib/libpthread/pthread_specific.c: revision 1.24 lib/libpthread/pthread_tsd.c: revision 1.10 lib/libpthread/pthread_tsd.c: revision 1.9 lib/libpthread/pthread_int.h: revision 1.88 Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads. Don't call the destructor in pthread_key_delete() following the standard.
1.21.6.2	23-Jun-2008	ad	pthread_curcpu_np: remove hack for pthread_dummy_lwpctl.
1.21.6.1	23-Jun-2008	ad	file pthread_specific.c was added on branch christos-time_t on 2008-06-23 10:38:40 +0000
1.21.2.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.21.2.2	16-Jan-2013	yamt	sync with (a bit old) head
1.21.2.1	30-Oct-2012	yamt	sync with head
1.22.2.3	23-Jun-2013	tls	resync from head
1.22.2.2	25-Feb-2013	tls	resync with head
1.22.2.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.6	22-Oct-2017	abhinav	Add missing function names in the NAME section for rest of the man pages in libpthread
1.5	09-Jul-2010	wiz	Mark up NULL.
1.4	09-Jul-2010	wiz	Remove empty line.
1.3	08-Jul-2010	jruoho	Add some remarks and clarifications, simplify RETURN VALUES, grammar, etc.
1.2	08-Jul-2010	wiz	Add comma in enumeration, remove Xr to itself from SEE ALSO.
1.1	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.11	25-May-2023	riastradh	libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.10	10-Apr-2022	riastradh	branches: 1.10.2; pthread: Nix trailing whitespace.
1.9	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.8	05-Feb-2020	kamil	Retire ifdef ERRORCHECK in pthread(3) It is enabled unconditionally since 2003 and used only for rwlocks and spinlocks. LLVM sanitizers make assumptions that these checks are enabled always.
1.7	31-Jan-2020	kamil	Refactor libpthread checks for invalid arguments Switch from manual functions to pthread__error().
1.6	16-Aug-2012	matt	branches: 1.6.24; 1.6.32; 1.6.34; Add a pthread__smt_wake and add support for it on arm along with pthread__smt_pause. These are implemented using the ARM instructions SEV (wake) and WFE (pause). These are treated as NOPs on ARM CPUs that don't support them.
1.5	28-Apr-2008	martin	branches: 1.5.4; 1.5.8; Remove clause 3 and 4 from TNF licenses
1.4	05-Jan-2008	ad	branches: 1.4.4; machine/lock.h, not sys/lock.h
1.3	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.2	10-Sep-2007	skrll	Merge nick-csl-alignment.
1.1	16-Aug-2007	ad	branches: 1.1.2; 1.1.4; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.1.4.3	10-Sep-2007	skrll	Fix inverted test.
1.1.4.2	03-Sep-2007	skrll	Sync with HEAD.
1.1.4.1	16-Aug-2007	skrll	file pthread_spin.c was added on branch nick-csl-alignment on 2007-09-03 10:14:16 +0000
1.1.2.2	09-Jan-2008	matt	sync with HEAD
1.1.2.1	06-Nov-2007	matt	sync with HEAD
1.4.4.1	18-May-2008	yamt	sync with head.
1.5.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.5.8.1	28-Apr-2008	martin	file pthread_spin.c was added on branch christos-time_t on 2008-04-28 20:23:02 +0000
1.5.4.1	30-Oct-2012	yamt	sync with head
1.6.34.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.6.32.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.6.24.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.10.2.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.7	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.6	26-May-2008	wiz	branches: 1.6.6; Sort sections. Use more markup.
1.5	26-May-2008	ad	Note that apps with real-time threads shouldn't use spinlocks because of the danger of deadlock, and note that in general spinlocks suck and mutexes should be used instead!
1.4	30-Apr-2008	martin	branches: 1.4.2; Convert TNF licenses to new 2 clause variant
1.3	17-Jun-2005	wiz	branches: 1.3.20; New sentence, new line.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.3.20.2	04-Jun-2008	yamt	sync with head
1.3.20.1	18-May-2008	yamt	sync with head.
1.4.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.6.6.2	26-May-2008	wiz	Sort sections. Use more markup.
1.6.6.1	26-May-2008	wiz	file pthread_spin_destroy.3 was added on branch christos-time_t on 2008-05-26 08:45:56 +0000
1.9	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.8	26-May-2008	wiz	branches: 1.8.6; Sort sections. Use more markup.
1.7	26-May-2008	ad	Note that apps with real-time threads shouldn't use spinlocks because of the danger of deadlock, and note that in general spinlocks suck and mutexes should be used instead!
1.6	30-Apr-2008	martin	branches: 1.6.2; Convert TNF licenses to new 2 clause variant
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	17-Jun-2005	peter	Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3	04-Jul-2003	wiz	branches: 1.3.4; 1.3.6; Drop trailing whitespace.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.3.6.1	18-Jun-2005	tron	Pull up revision 1.4 (requested by peter in ticket #473): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.3.4.1	21-Jun-2005	riz	Pull up revision 1.4 (requested by peter in ticket #2002): Fix various spelling errors. From Igor Sobrado in PR/29997.
1.5.20.2	04-Jun-2008	yamt	sync with head
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.8.6.2	26-May-2008	wiz	Sort sections. Use more markup.
1.8.6.1	26-May-2008	wiz	file pthread_spin_init.3 was added on branch christos-time_t on 2008-05-26 08:45:56 +0000
1.9	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.8	26-May-2008	wiz	branches: 1.8.6; Sort sections. Use more markup.
1.7	26-May-2008	ad	Note that apps with real-time threads shouldn't use spinlocks because of the danger of deadlock, and note that in general spinlocks suck and mutexes should be used instead!
1.6	30-Apr-2008	martin	branches: 1.6.2; Convert TNF licenses to new 2 clause variant
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	04-Jul-2003	wiz	New sentence, new line.
1.3	04-Jul-2003	wiz	Fix SEE ALSO.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.5.20.2	04-Jun-2008	yamt	sync with head
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.8.6.2	26-May-2008	wiz	Sort sections. Use more markup.
1.8.6.1	26-May-2008	wiz	file pthread_spin_lock.3 was added on branch christos-time_t on 2008-05-26 08:45:56 +0000
1.9	08-Jul-2010	rmind	Merge/group man pages: - pthread_barrier_{init,destroy,wait} into pthread_barrier(3). - pthread_cond_* into pthread_cond(3). - pthread_mutex_* into pthread_mutex(3). - pthread_rwlock_* into pthread_rwlock(3). - pthread_spin_* into pthread_spin(3). Cross-link amongst groups. OK jruoho@
1.8	26-May-2008	wiz	branches: 1.8.6; Sort sections. Use more markup.
1.7	26-May-2008	ad	Note that apps with real-time threads shouldn't use spinlocks because of the danger of deadlock, and note that in general spinlocks suck and mutexes should be used instead!
1.6	30-Apr-2008	martin	branches: 1.6.2; Convert TNF licenses to new 2 clause variant
1.5	17-Jun-2005	wiz	branches: 1.5.20; New sentence, new line.
1.4	04-Jul-2003	wiz	Fix SEE ALSO.
1.3	01-Jul-2003	wiz	We do not want empty lines in mdoc.
1.2	08-Jun-2003	thorpej	$NetBSD$, not $Header$.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, written by Stephen Degler.
1.5.20.2	04-Jun-2008	yamt	sync with head
1.5.20.1	18-May-2008	yamt	sync with head.
1.6.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.8.6.2	26-May-2008	wiz	Sort sections. Use more markup.
1.8.6.1	26-May-2008	wiz	file pthread_spin_unlock.3 was added on branch christos-time_t on 2008-05-26 08:45:56 +0000
1.22	16-Aug-2007	ad	Remove PT_FIXEDSTACKSIZE_LG.
1.21	16-Aug-2007	ad	Cache thread context for creation instead of setting it up every time. Speeds create/join loop by about 10-15% on i386.
1.20	02-Mar-2007	ad	branches: 1.20.2; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.19	20-Jan-2007	christos	add casts to pacify lint.
1.18	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.17	12-Feb-2006	yamt	- do PTHREAD_MLOCK_KLUDGE in pthread__stackid_setup, rather than callers, so that the main thread is not different from others. as a side effect, fix memory leak in pthread_create on error. - make pthread__stackid_setup return a error rather than calling err(2).
1.16	17-Aug-2004	chs	redo the fix for PR 26392 differently: instead of changing the stack bounds for the initial stack, just change the initial thread's pt_uc to point to the opposite end of the stack (away from the argv, environment, etc).
1.15	25-Jul-2004	chs	in pthread__initmain(), don't reuse the part of the initial stack that is occupied by the argv and environment (and MD stuff like the page-table mapping on x86). fixes PR 26392.
1.14	20-Jul-2004	chs	fix some stack-pointer math in the previous revision.
1.13	18-Jul-2004	chs	enhance MI pthreads code to support hppa: - statically initialize all global spin locks. on hppa, 0 means the lock is held, so leaving them with the default value doesn't work. - compare functions pointers using a function-pointer type rather than an integral type. on hppa, function pointers may be indirect, so we need to trigger gcc to emit calls to the function-pointer canonicalization routines in the millicode. - on hppa the stack grows up, so handle that using the STACK_* macros.
1.12	14-Mar-2004	cl	branches: 1.12.2; fix comment for recent pthread_stack* var rename
1.11	02-Feb-2004	nathanw	Rename pt_stacksize, pt_stacksize_lg, and pt_stackmask to pthread_*. External symbols can't start with pt_, as that is in the application namespace.
1.10	02-Jan-2004	cl	userland part of no-syscall upcall stack return - add pt_stackinfo to struct __pthread_st - add pthread__stackinfo_offset returning the offset from ss_sp to pt_stackinfo - pass stackinfo_offset to sa_register and set SA_FLAG_STACKINFO to make the kernel use it - call pthread__sa_recycle in pthread__resolve_locks; g/c recycleq and pthread__recycle_bulk - return stack in pthread__sa_recycle by incrementing sasi_stackgen - make pthread__sa_recycle debugging output formatting conditional on pthread__debug_newline
1.9	27-Nov-2003	cl	Set default stack size to the current limit on the stack size as set with the shell's command to change limits. Make the PTHREAD_STACKSIZE environment variable override the default stack size. The old fixed stack size behaviour can be enable with PT_FIXEDSTACKSIZE_LG when building libpthread.
1.8	17-Jul-2003	nathanw	Simplify pthread__stackalloc() by using the newish aligned-mmap() feature.
1.7	08-Mar-2003	lukem	add __RCSID()
1.6	15-Feb-2003	nathanw	Remove unnecessary inclusion of <assert.h>.
1.5	19-Jan-2003	thorpej	Remove the dummy stack attr routines -- best to catch broken applications and fix them to use the proper feature test instead (as has already been done with the openldap package).
1.4	19-Jan-2003	christos	- constify the get functions - remove argument variable names since they pollute the namespace - add mock implementation of the missing stack functions XXX: we need to do this right [i.e. actually get and set sizes and addresses] but the current stack setup makes this a bit complicated.
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_stack.c was initially added on branch nathanw_sa.
1.1.2.9	20-Dec-2002	thorpej	Include <stdint.h> to ensure we have uintptr_t.
1.1.2.8	20-Dec-2002	nathanw	Align space for new ucontext_t, if necessary.
1.1.2.7	03-Nov-2002	skrll	Remove trailing newlines.
1.1.2.6	27-Oct-2002	thorpej	Cosmetic changes.
1.1.2.5	04-Sep-2002	nathanw	Use mprotect(PROT_NONE) instead of munmap() to mark the thread stack red zone. Problem pointed out by Joel Schopp.
1.1.2.4	25-Jul-2001	nathanw	Remove an unused variable.
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	13-Jul-2001	nathanw	Use munmap() to redzone-protect the end of the stack allocations.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.12.2.2	22-Aug-2004	tron	Pull up revision 1.16 via patch (requested by chs in ticket #768): redo the fix for PR 26392 differently: instead of changing the stack bounds for the initial stack, just change the initial thread's pt_uc to point to the opposite end of the stack (away from the argv, environment, etc).
1.12.2.1	26-Jul-2004	tron	Pull up revision 1.15 via patch (requested by chs in ticket #714): in pthread__initmain(), don't reuse the part of the initial stack that is occupied by the argv and environment (and MD stuff like the page-table mapping on x86). fixes PR 26392.
1.20.2.1	03-Sep-2007	skrll	Sync with HEAD.
1.5	09-Jul-2010	jruoho	Fix the return values; pthread_resume_np() may fail with ESRCH. In addition, some improvements to markup and wording.
1.4	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.3	30-Apr-2008	martin	branches: 1.3.8; Convert TNF licenses to new 2 clause variant
1.2	12-Nov-2003	wiz	branches: 1.2.32; Various fixes.
1.1	12-Nov-2003	christos	Document pthread_attr_setcreatesuspend_np, pthread_suspend_np, pthread_resume_np
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.3.8.1	30-Apr-2008	martin	file pthread_suspend_np.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.10	05-Mar-2025	riastradh	pthread_testcancel(3): Add a colon for clarity in man page. `No punctual change intended.'
1.9	18-Mar-2014	riastradh	branches: 1.9.38; Merge riastradh-drm2 to HEAD.
1.8	20-Jul-2013	wiz	Use Mt for email addresses.
1.7	06-Aug-2010	wiz	branches: 1.7.6; 1.7.12; 1.7.16; Fix typo.
1.6	06-Aug-2010	christos	make kevent(2) a cancelation point, and document properly all the cancelation points we currently support.
1.5	09-Jul-2010	jruoho	Update conformance to the 2001 revision.
1.4	30-Apr-2008	martin	branches: 1.4.8; Convert TNF licenses to new 2 clause variant
1.3	18-Nov-2003	thorpej	branches: 1.3.32; Userland portion of fsync_range(2), written by Bill Studenmund, and contributed by Wasabi Systems, Inc.
1.2	04-Jul-2003	wiz	.Pp fixes.
1.1	03-Jun-2003	nathanw	Man pages for libpthread, adapted from FreeBSD by Stephen Degler.
1.3.32.1	18-May-2008	yamt	sync with head.
1.4.8.2	30-Apr-2008	martin	Convert TNF licenses to new 2 clause variant
1.4.8.1	30-Apr-2008	martin	file pthread_testcancel.3 was added on branch christos-time_t on 2008-04-30 13:10:53 +0000
1.7.16.1	23-Jul-2013	riastradh	sync with HEAD
1.7.12.1	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.7.6.1	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.9.38.1	02-Aug-2025	perseant	Sync with HEAD
1.26	01-Mar-2025	christos	Explain that the pthread_atfork() call will not call malloc from here.
1.25	10-Apr-2022	riastradh	branches: 1.25.4; pthread: Nix trailing whitespace.
1.24	12-Feb-2022	riastradh	libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.23	11-Jun-2020	ad	Drop self->pt_lock before clearing TSD / malloc TSD.
1.22	19-Apr-2020	joerg	Improve TSD behavior Optimistically check whether the key has been used by this thread already and avoid locking in that case. This avoids the atomic operation in the hot path. When the value is set to non-NULL for the first time, put the entry on the to-be-freed list and keep it their until destruction or thread exit. Setting the key to NULL and back is common enough and updating the list is more expensive than the extra check on the final round.
1.21	19-Apr-2020	joerg	Reinit TSD mutex in the child to avoid issues with former waiters
1.20	16-Feb-2020	kamil	Revert "Enhance the pthread(3) + malloc(3) init model" It is reported to hand on aarch64 with gzip.
1.19	15-Feb-2020	kamil	Enhance the pthread(3) + malloc(3) init model Separate the pthread_atfork(3) call from pthread_tsd_init() and move it into a distinct function. Call inside pthread__init() late TSD initialization route, just after "pthread_atfork(NULL, NULL, pthread__fork_callback);". Document that malloc(3) initialization is now controlled again and called during the first pthread_atfork(3) call. Remove #if 0 code from pthread_mutex.c as we no longer initialize malloc prematurely.
1.18	25-Dec-2019	joerg	Since pthread_setspecific requires locks, ensure that they are acquired before fork and dropped in both parent and child. At least Python depends on TSD after fork, even though it is undefined behavior in POSIX.
1.17	05-Mar-2019	christos	Transfer all the keys that were created in the libc stub implementation to the pthread tsd implementation when the main thread is created. This corrects a problem where a process created keys before libpthread was loaded (either from the libc constructor or because libpthread was dlopened later). This fixes a problem with jemalloc which creates keys in the constructor.
1.16	09-Jul-2017	christos	branches: 1.16.6; PR/52386: Use the number of iterations we document.
1.15	25-Aug-2015	pooka	branches: 1.15.8; Revert 1.14 now that the arduous task of fixing rumphijack to allow mmap() in early init has been completed.
1.14	30-May-2015	christos	Thanks rump for not letting us use even mmap during initialization.
1.13	29-May-2015	christos	Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly.
1.12	29-May-2015	manu	Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256.
1.11	21-Mar-2013	christos	branches: 1.11.8; - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.10	22-Nov-2012	christos	Don't call the destructor in pthread_key_delete() following the standard.
1.9	21-Nov-2012	christos	Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads.
1.8	02-Mar-2012	joerg	branches: 1.8.2; Fix indentation.
1.7	28-Apr-2008	martin	branches: 1.7.4; 1.7.8; 1.7.24; Remove clause 3 and 4 from TNF licenses
1.6	08-Mar-2008	ad	branches: 1.6.2; Add a cast to make lint happy.
1.5	07-Mar-2008	ad	pthread_key_create: instead of using a simple 1/0 value to record a key as allocated, use an array of pointers and save __builtin_return_address(0) so keys can be identified when doing post-mortem debugging.
1.4	24-Dec-2007	ad	branches: 1.4.2; - Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.3	16-Aug-2007	ad	branches: 1.3.2; - Reinitialize the absolute minimum when recycling user thread state. Chops another ~10% off create/join in a loop on i386. - Disable low level debugging as this is stable. Improves benchmarks across the board by a small percentage. Uncontested mutex acquire and release in a loop becomes about 8% quicker. - Minor cleanup.
1.2	29-Sep-2003	wiz	branches: 1.2.20; available, not avaliable. From miod@openbsd.
1.1	13-Aug-2003	nathanw	Split out pthread_{set,get}specific() into a separate file and arrange for that file to not be built with profiling. This makes it reasonable to use pthread_{set,get}specific() to implement thread-safe profiline call counts.
1.2.20.1	03-Sep-2007	skrll	Sync with HEAD.
1.3.2.2	23-Mar-2008	matt	sync with HEAD
1.3.2.1	09-Jan-2008	matt	sync with HEAD
1.4.2.1	24-Mar-2008	keiichi	sync with head.
1.6.2.1	18-May-2008	yamt	sync with head.
1.7.24.3	29-Apr-2013	riz	Pull up following revision(s) (requested by manu in ticket #869): lib/libpthread/pthread_rwlock.c: revision 1.33 lib/libc/include/reentrant.h: revision 1.16 lib/libpthread/pthread_cond.c: revision 1.59 lib/libpthread/pthread_misc.c: revision 1.15 lib/libc/thread-stub/thread-stub.c: revision 1.23 lib/libpthread/pthread_cancelstub.c: revision 1.38 lib/libpthread/pthread_specific.c: revision 1.26 lib/libpthread/pthread_mutex.c: revision 1.56 lib/libpthread/pthread_tsd.c: revision 1.11 lib/libpthread/Makefile: revision 1.80 lib/libpthread/pthread.c: revision 1.143 lib/libpthread/pthread_int.h: revision 1.89 - Allow libpthread to be dlopened again, by providing libc stubs to libpthread. - Fail if the dlopened libpthread does pthread_create(). From manu@ - Discussed at length in the mailing lists; approved by core@ - This was chosen as the least intrusive patch that will provide the necessary functionality. XXX: pullup to 6
1.7.24.2	02-Dec-2012	riz	Back out ticket #724 (libpthread changes) until they can be better understood, as they broke threaded programs on (at least) i386 and amd64.
1.7.24.1	28-Nov-2012	riz	Pull up following revision(s) (requested by christos in ticket #724): lib/libpthread/pthread_specific.c: revision 1.24 lib/libpthread/pthread_tsd.c: revision 1.10 lib/libpthread/pthread_tsd.c: revision 1.9 lib/libpthread/pthread_int.h: revision 1.88 Replace the simple implementation of pthread_key_{create,destroy} and pthread_{g,s}etspecific functions, to one that invalidates values of keys in other threads when pthread_key_delete() is called. This fixes chromium, which expects pthread_key_delete() to do cleanup in all threads. Don't call the destructor in pthread_key_delete() following the standard.
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file pthread_tsd.c was added on branch christos-time_t on 2008-04-28 20:23:02 +0000
1.7.4.3	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.7.4.2	16-Jan-2013	yamt	sync with (a bit old) head
1.7.4.1	17-Apr-2012	yamt	sync with head
1.8.2.2	23-Jun-2013	tls	resync from head
1.8.2.1	25-Feb-2013	tls	resync with head
1.11.8.1	24-Nov-2015	martin	Pull up following revision(s) (requested by manu in ticket #829): lib/libpthread_dbg/pthread_dbg.c: revision 1.43 (via patch) lib/libpthread/pthread_int.h: revision 1.91-1.92 (via patch) lib/libc/stdlib/jemalloc.c: revision 1.37-1.38 lib/libpthread/pthread_tsd.c: revision 1.12-1.14 (via patch) include/limits.h: revision 1.34 (via patch) lib/libpthread/pthread.c: revision 1.146-1.147 (via patch) lib/libpthread/pthread_key_create.3: revision 1.7 (via patch) libpthread: Make PTHREAD_KEYS_MAX dynamically adjustable NetBSD's PTHREAD_KEYS_MAX is set to 256, which is low compared to other systems like Linux (1024) or MacOS X (512). As a result some setups tested on Linux will exhibit problems on NetBSD because of pthread_keys usage beyond the limit. This happens for instance on Apache with various module loaded, and in this case no particular developper can be blamed for going beyond the limit, since several modules from different sources contribute to the problem. This patch makes the limit conigurable through the PTHREAD_KEYS_MAX environement variable. If undefined, the default remains unchanged (256). In any case, the value cannot be lowered below POSIX-mandated _POSIX_THREAD_KEYS_MAX (128). While there: - use EXIT_FAILURE instead of 1 when calling err(3) in libpthread. - Reset _POSIX_THREAD_KEYS_MAX to POSIX mandated 128, instead of 256. Fix previous: Can't use calloc/malloc before we complete initialization of the thread library, because malloc uses pthread_foo_specific, and it will end up initializing itself incorrectly. Thanks rump for not letting us use even mmap during initialization. libc/jemalloc: Fix non _REENTRANT build. Defer using pthread keys until we are threaded. From Christos, fixes PR port-arm/50087 by allowing malloc calls prior to libpthread initialization.
1.15.8.1	24-Jul-2017	snj	Pull up following revision(s) (requested by kamil in ticket #119): lib/libpthread/pthread_tsd.c: revision 1.16 PR/52386: Use the number of iterations we document.
1.16.6.3	21-Apr-2020	martin	Sync with HEAD
1.16.6.2	08-Apr-2020	martin	Merge changes from current as of 20200406
1.16.6.1	10-Jun-2019	christos	Sync with HEAD
1.25.4.1	02-Aug-2025	perseant	Sync with HEAD
1.27	10-Apr-2022	riastradh	pthread: Nix trailing whitespace.
1.26	10-Mar-2021	christos	Use __pthread_volatile for ptc_waiters (Greg A. Woods)
1.25	10-Jun-2020	ad	- Make pthread_condvar and pthread_mutex work on the stack rather than in pthread_t, so there's less chance of bad things happening if someone calls (for example) pthread_cond_broadcast() from a signal handler. - Remove all the deferred waiter handling except for the one case that really matters which is transferring waiters from condvar -> mutex on wakeup, and do that by splicing the condvar's waiters onto the mutex. - Remove the mutex waiters bit as it's another complication that's not strictly needed.
1.24	01-Jun-2020	ad	In the interests of reliability simplify waiter handling more and redo condvars to manage the list of waiters with atomic ops.
1.23	09-Sep-2017	kamil	Support <pthread_typs.h> on C89 compilers Clang 5.0.0(svn) reports warnings on <pthread_types.h> for C99 constructs when used with strict -std=c89. Restrict designated initializers usage to C99 or newer code. C89 and C++ will share the same code without extension of designated initializers. PR 52285
1.22	20-Jul-2016	christos	unnamed unions need special treatment since they need braced initializers for old style initializations.
1.21	20-Jul-2016	christos	cplusplus does not like complex named initializers...
1.20	20-Jul-2016	christos	use named initializers
1.19	17-Jul-2016	skrll	Use anonymous union for ptm_ceiling and old __pthread_spin_t field to maintain backward compatibility and fix hppa build. hppa has an non- integer type __pthread_spin_t
1.18	03-Jul-2016	christos	branches: 1.18.2; GSoC 2016 Charles Cui: Implement thread priority protection based on work by Andy Doran. Also document the get/set pshared thread calls as not implemented, and add a skeleton implementation that is disabled. XXX: document _sched_protect(2).
1.17	27-Aug-2015	pooka	Fix PTHREAD_FOO_INITIALIZER for C++ by not using volatile in the relevant pthread types in C++ builds, attempt 2. The problem with attempt 1 was making assumptions of what the MD __cpu_simple_lock_t (declared volatile) looks like. To get a same type except non-volatile, we change the MD type to __cpu_simple_lock_nv_t and typedef __cpu_simple_lock_t as a volatile __cpu_simple_lock_nv_t. IMO, __cpu_simple_lock_t should not be volatile at all, but changing it now is too risky. Fixes at least Rumprun w/ gcc 5.1/5.2. Furthermore, the mpd application (and possibly others) will no longer require NetBSD-specific patches. Tested: build.sh for i386, Rumprun for x86_64 w/ gcc 5.2. Based on the patch from Christos in lib/49989.
1.16	26-Jun-2015	pooka	Rev 1.14 was nice except it didn't work with _INITIALIZER, which sort of negates the whole point ... so revert everything while in drawing board mode.
1.15	26-Jun-2015	pooka	Don't depend on __CPU_SIMPLE_LOCK_PAD to determine the type of __cpu_simple_lock_t (because it doesn't). Instead, use sizeof/alignof with a struct { uchar[] }. Fixes problem in previous commit, caught by Nick Hudson.
1.14	26-Jun-2015	pooka	C++ (namely libc++) expects to be using PTHREAD_FOO_INITIALIZER as a member initializer. This does not work for volatile types. Since C++ does not touch the guts of those types, redefine them as non-volatile. Fixes libc++ compilation with g++ 5.1, as reported in PR lib/49989.
1.13	02-Aug-2008	matt	branches: 1.13.6; Change pthread_mutex_t to use the amount of space as and be congruent to the version used in the SA version of pthreads. This preserves binary compatibility between both versions of the library.
1.12	05-Jun-2008	ad	Back out previous because it breaks the build.
1.11	05-Jun-2008	ad	glibc compatibile PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP, requested by rafal@.
1.10	28-Apr-2008	martin	branches: 1.10.2; Remove clause 3 and 4 from TNF licenses
1.9	14-Feb-2008	ad	branches: 1.9.4; Adjust mutex/rwlock definitions to match reality now that there is only one implementation of each. PR lib/38030.
1.8	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.7	04-Aug-2007	ad	branches: 1.7.2; 1.7.4; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.6	02-May-2007	ad	branches: 1.6.2; Remove obsolete comment.
1.5	26-Sep-2003	nathanw	Don't include <machine/lock.h> anymore; instead, we now get __cpu_simple_lock_t and __SIMPLELOCK_{UN,}LOCKED from <sys/types.h>. Should prevent the massive namespace pollution by way of dragging in many MD headers that has been observed to break stuff.
1.4	17-Jul-2003	nathanw	Prepare for inclusion in sys/types.h by ensuring that all the symbols defined end with _t or start with _[A-Z_].
1.3	25-Jan-2003	nathanw	Make pthread_barrier_wait() handle spurious wakeups from pthread__block() by adding a generation number to the barrier structure and incrementing it when the barrier fires. XXX this is an ABI change for anything using barriers, but the library is new enough and nothing in the tree uses barriers so I'm going to let it slide. Using the private data pointer for a field that will always be present would be excessive.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Jul-2001	nathanw	branches: 1.1.2; file pthread_types.h was initially added on branch nathanw_sa.
1.1.2.12	07-Jan-2003	thorpej	Implement the pthread_barrier API.
1.1.2.11	06-Jan-2003	nathanw	ABI change, while this is still on the branch: Add pointers to private storage to major exposed data structures. This should redudce the need for ABI changes with future expansion.
1.1.2.10	30-Dec-2002	thorpej	Add support for using RAS lock primitives on uniprocessors where RAS is available.
1.1.2.9	28-Oct-2002	nathanw	Implement POSIX read-write locks.
1.1.2.8	01-Mar-2002	nathanw	Declare POSIX spinlock interfaces: pthread_spin_*() and pthread_spinlock_t. Move the internal spinlock interface declarations back to the internal header.
1.1.2.7	30-Dec-2001	nathanw	Avoid including pthread_queue.h and thereby exposing the PTQ_* macros to userland, by #defining a local _PTQ_HEAD, identical to PTQ_HEAD in pthread_queue.h, and using {NULL, NULL} in place of PTQ_HEAD_INITIALIZER. Rename struct pt_queue_t to struct pthread_queue_t. Rename pt_spin_t to pthread_spin_t.
1.1.2.6	08-Aug-2001	nathanw	Add pthread_once and thread-specific data types.
1.1.2.5	25-Jul-2001	nathanw	Standardize MAGIC/DEAD values. Fix PTHREAD_MUTEX_INITIALIZER. Create pthread_mutexattr_t and pthread_condattr_t types. Creat PTHREAD_COND_INITIALIZER.
1.1.2.4	25-Jul-2001	nathanw	Implement most of condition variables (pthread_cond_timedwait() is not yet done).
1.1.2.3	24-Jul-2001	nathanw	Prefix some application-visible symbols with an underscore.
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	13-Jul-2001	nathanw	Move some of the more internal types to another file, to improve readability. C sucks, or I'd take them out of the application visibility completely.
1.6.2.2	10-Sep-2007	skrll	Sync with HEAD.
1.6.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.7.4.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.7.4.1	04-Aug-2007	ad	file pthread_types.h was added on branch matt-mips64 on 2007-08-04 13:37:51 +0000
1.7.2.2	23-Mar-2008	matt	sync with HEAD
1.7.2.1	06-Nov-2007	matt	sync with HEAD
1.9.4.1	18-May-2008	yamt	sync with head.
1.10.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.13.6.2	02-Aug-2008	matt	Change pthread_mutex_t to use the amount of space as and be congruent to the version used in the SA version of pthreads. This preserves binary compatibility between both versions of the library.
1.13.6.1	02-Aug-2008	matt	file pthread_types.h was added on branch christos-time_t on 2008-08-02 19:46:31 +0000
1.18.2.1	26-Jul-2016	pgoyette	Sync with HEAD
1.8	15-Dec-2024	riastradh	libpthread: Zero-initialize res_state objects. PR lib/58888
1.7	12-Feb-2022	riastradh	branches: 1.7.2; 1.7.4; libpthread: Move namespacing include to top of .c files. Stuff like libc's namespace.h, or atomic_op_namespace.h, which does namespacing tricks like `#define atomic_cas_uint _atomic_cas_uint', has to go at the top of each .c file. If it goes in the middle, it might be too late to affect the declarations, and result in compile errors. I tripped over this by including <sys/atomic.h> in mips <machine/lock.h>. (Maybe we should create a new pthread_namespace.h file for the purpose, but this'll do for now.)
1.6	28-Apr-2008	martin	branches: 1.6.8; 1.6.66; Remove clause 3 and 4 from TNF licenses
1.5	13-Nov-2007	ad	branches: 1.5.6; For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.4	03-Jun-2004	christos	branches: 1.4.18; simplify and make more efficient (YAMAMOTO Takashi)
1.3	24-May-2004	christos	Oops, forgot to commit this.
1.2	22-May-2004	christos	Provide access to _res in the non-threaded case, and abort in the threaded case.
1.1	21-May-2004	christos	add pool code for res state. XXX: could be more efficient.
1.4.18.1	09-Jan-2008	matt	sync with HEAD
1.5.6.1	18-May-2008	yamt	sync with head.
1.6.66.1	15-Dec-2024	martin	Pull up following revision(s) (requested by riastradh in ticket #1930): lib/libpthread/res_state.c: revision 1.8 libpthread: Zero-initialize res_state objects. PR lib/58888
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file res_state.c was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7.4.1	02-Aug-2025	perseant	Sync with HEAD
1.7.2.1	15-Dec-2024	martin	Pull up following revision(s) (requested by riastradh in ticket #1029): lib/libpthread/res_state.c: revision 1.8 libpthread: Zero-initialize res_state objects. PR lib/58888
1.5	15-Jan-2008	rmind	Implementation of processor-sets, affinity and POSIX real-time extensions. Add schedctl(8) - a program to control scheduling of processes and threads. Notes: - This is supported only by SCHED_M2; - Migration of LWP mechanism will be revisited; Proposed on: <tech-kern>. Reviewed by: <ad>.
1.4	09-Oct-2005	kleink	branches: 1.4.12; Change the sched_*() functions to return -1 and set errno to ENOSYS (per the standard) instead of returning ENOSYS. Noted by Ian Zagorskih in PR kern/30970.
1.3	08-Mar-2003	lukem	branches: 1.3.4; 1.3.6; add __RCSID()
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file sched.c was initially added on branch nathanw_sa.
1.1.2.4	08-Jan-2003	thorpej	Rewrite the way libpthread provides thread primitives to libc, using strong and weak aliases (the way cancelation points are handled). Work around lame Unix static library semantics which could cause the wrong thread primitives or cancelation point functions to be included in a statically-linked program. THIS IS AN ABI CHANGE. People running the nathanw_sa branch should ensure that their libc and libpthread are in sync after updating.
1.1.2.3	27-Oct-2002	thorpej	Cosmetic changes.
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.3.6.1	10-Oct-2005	tron	Pull up following revision(s) (requested by kleink in ticket #875): include/sched.h: revision 1.8 lib/libpthread/sched.c: revision 1.4 Change the sched_*() functions to return -1 and set errno to ENOSYS (per the standard) instead of returning ENOSYS. Noted by Ian Zagorskih in PR kern/30970.
1.3.4.1	28-Oct-2005	jmc	Pullup from trunk 1.3->1.4
1.4.12.1	23-Mar-2008	matt	sync with HEAD
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file sched.h was initially added on branch nathanw_sa.
1.1.2.6	11-Apr-2002	thorpej	This file is exactly the same as include/sched.h; don't bother with the second copy.
1.1.2.5	30-Dec-2001	nathanw	Make a comment more clear.
1.1.2.4	17-Nov-2001	thorpej	Whitespace nit.
1.1.2.3	16-Nov-2001	thorpej	Since this file goes in <sched.h>, add the things that are in src/include/sched.h to this header file. We will deprecate src/include/sched.h when this is pulled down onto the trunk.
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.3	10-Mar-2008	rmind	Add sched(3) manual page, and appropriate links. Thanks <wiz> for review and fixes!
1.2	15-Dec-2004	wiz	branches: 1.2.18; 1.2.24; Grammar improvements.
1.1	14-Dec-2004	yamt	document sched_yield.
1.2.24.1	24-Mar-2008	keiichi	sync with head.
1.2.18.1	23-Mar-2008	matt	sync with HEAD
1.25	03-Feb-2019	thorpej	Implement support for "pshared" POSIX semaphores. Fixes lib/53273 (and Firefox's multi-process tab feature).
1.24	10-Mar-2012	joerg	branches: 1.24.32; Fix error handling
1.23	08-Mar-2012	joerg	Implement sem_timedwait.
1.22	07-Mar-2012	joerg	Remove libpthread's semaphore implementation and always use the kernel one. The implementation doesn't provide an async-safe sem_post and can't without a lot of work on the pthread primitives. Remove bogus time out requirement in test case, it should have been a "known failure" if anything.
1.21	14-Nov-2008	ad	branches: 1.21.2; 1.21.10; Replace semid_t with intptr_t. No function change. This is a libc/kernel private interface and so the name change should not affect any third party code.
1.20	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.19	24-Dec-2007	ad	branches: 1.19.4; - Use pthread__cancelled() in more places. - pthread_join(): assert that pthread_cond_wait() returns zero.
1.18	14-Sep-2007	tnn	sem_post(): pthread__self() is no longer used here.
1.17	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.16	16-Aug-2007	ad	branches: 1.16.2; Trim fat off libpthread internal spinlock operations. Makes a mesurable improvement across the board.
1.15	04-Aug-2007	ad	branches: 1.15.2; Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.14	24-Mar-2007	ad	branches: 1.14.2; - Test+branch is usually cheaper than making an indirect function call, so avoid making them. - When parking an LWP on a condition variable, point the hint argument at the mutex's waiters queue. Chances are we will be awoken from that later.
1.13	05-Mar-2007	ad	- Update to match changed pthread__park() interface. - Simplify the locking in sem_wait().
1.12	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.11	24-Dec-2006	ad	Fix bugs with and improve upon previous.
1.10	23-Dec-2006	ad	Conditionalised support for 1:1 threads. Needs associated kernel changes and more work to be useful.
1.9	19-Oct-2005	chs	branches: 1.9.4; 1.9.6; starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. I also noticed that there's a "sem2" test that has never worked in its single-threaded form. the problem there is that a signal handler tries to take a sem_t interlock which is already held when the signal is received. fix this too, by adding a single-threaded case for sig_trywait() that blocks signals instead of using the userland interlock.
1.8	16-Oct-2005	chs	in pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. fixes PR 20256, PR 24241, PR 25722, PR 26096.
1.7	24-Nov-2003	cl	branches: 1.7.6; Update mutex/rwlock/sem code to match recent change in cond code.
1.6	08-Mar-2003	lukem	add __RCSID()
1.5	24-Jan-2003	thorpej	Correct omission in notice.
1.4	22-Jan-2003	thorpej	sem_init(): oops, only destroy the ksem on error if it is a ksem.
1.3	22-Jan-2003	thorpej	Rewrite to use our internal scheduling primitives.
1.2	20-Jan-2003	christos	more sem to _sem_st
1.1	20-Jan-2003	christos	add support for p1003.1b semaphores. From FreeBSD
1.7.6.1	01-Nov-2005	jmc	Pullup revs 1.8-1.9 (requested by chs in ticket #926) In pthread_mutex_lock_slow(), pthread_rwlock_timedrdlock() and sem_wait(), call pthread__start() if it hasn't already been called. this avoids an internal assertion from the library if these routines are used before any threads are created and they need to sleep. PR#20256, PR#24241, PR#25722, PR#26096 Fix the interaction between sigtimedwait() and pthread_kill(), both waking up a sleeping thread and avoiding going to sleep if a signal is already pending. PR#30348 In pthread_kill() and pthread_suspend_np(), return without doing anything f the target thread is a zombie. In all the functions that didn't do so already, verify a pthread_t before dereferencing it (under #ifdef ERRORCHECK, since these checks are not mandated by the standard). Starting the pthread library (ie. calling pthread__start()) before any threads are created turned out to be not such a good idea. there are stronger requirements on what has to work in a forked child while a process is still single-threaded. so take all that stuff back out and fix the problems with single-threaded programs that are linked with libpthread differently, by checking if the library has been started and doing completely different stuff if it hasn't been: - for pthread_rwlock_timedrdlock(), just fail with EDEADLK immediately. - for sem_wait(), the only thing that can unlock the semaphore is a signal handler, so use sigsuspend() to wait for a signal. - for pthread_mutex_lock_slow(), just go into an infinite loop waiting for signals. If mlock() fails in pthread_create(), return EAGAIN instead of failing an assertion.
1.9.6.2	04-Nov-2007	wrstuden	Check in changes to locking behavior. pthread__sched() now takes a parameter indicating if the run queue is already locked. Useful in cases where we already hold pthread__runqueue_lock. pthread__suspend() now requires callers explicitly lock pthread__runqueue_lock so we avoid issues with locking order regarding pt_statelock. Adjsut our lock hierarchy. pthread__runqueue_lock is now above pt_statelock, triggering the above adjustments. Adjust a lot of routines as a result. Also move pt_siglock way up in the hierarchy, making pthread__kill() not violate locking. Add a few extra locks to the list. Adjust a botch in how pthread_join() used pthread-spintrylock(). pthread_cancel() now correctly walks up the locks with thread->pt_sleeplock. We can't just lock it, as it points to a lock in the top locking rung. So try locking, and if it fails, unlock and re-lock. Add code to cope with the target thread not being in the expected state (which was on a blocked queue) after we get all the locks. Add comments to describe what's going on in places that I got confused. Now that pt_statelock is lower in the locking order than pthread__runqueue_lock, we can explicitly lock a thread's state before we take it off the run queue. Adjust sched_yield() accordingly and add some locking calls that were commented out before (as they'd have been locking violations). pthread_next(): now that we can lock the state lock while holding the run queue lock, do so. Set a thread's state to PT_STATE_RUNNING before we pull it off the run queue. Since we always are going to switch to it, set pt_vpid and pt_lastlwp while setting the state. pthread_next callers now _don't_ set these values. pthread__kill(): grab pthread__runqueue_lock before target->pt_statelock. If we want to target a thread that is on a blocked queue, do the pthread_spintrylock() dance. Unlock all three locks we're running around with, lock target->pt_sleeplock, then re-lock them all. After we lock, make sure that the thread's still on a blocked queue before proceeding. If it's not, either exit (if we wanted to wake out of sigtimedwait()) or start it all over. If the thread has gone live, it may have blocked our signal and it'd be quite weird to get a signal you'd disabled, just because the signaller had been running before you blocked it.
1.9.6.1	10-Sep-2007	wrstuden	Check in first step towards having pthread_kill() kill a thread running on another CPU. This change adds initial support for deferred signal handling. Just before we go to sleep and while we hold &self->pt_statelock, check to see if we have any deferred signals (blocked signals) pending. These are signals that are not masked in our mask and which have been sent to us. We were running when they came in. Further, since they are being handled this way, there's a signal handler defined for them. So unlock, run the signal handler(s), then carry on. For condition variables, we consider this a spurious wakeup, so we just return 0, having not unlocked the mutex. We run the handler with the mutex held. This shouldn't matter, as you aren't supposed to play with mutexes in signal handlers. :-) For nanosleep(), we just process signals, then go to sleep. For all other cases, we are in a loop with some external predicate. So we process the signal then roll around the loop to see if it still applies. In sched_yield(), spin until all deferred signals are gone. Since we hold self->pt_statelock and that lock has to be held before sending a deferred signal, no new deferred signals will come in until we're asleep. While here, be more careful about locking while changing pt_state to PT_STATE_RUNNING. Grab pt_statelock while doing it, and also set next->pt_vpid to self->pt_vpid holding the same lock. Will make the test to determine how to deliver a signal work right (since a thread's vpid will soon matter in the general case). No longer set next->pt_vpid in pthread__next().
1.9.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.14.2.3	10-Sep-2007	skrll	Sync with HEAD.
1.14.2.2	03-Sep-2007	skrll	Sync with HEAD.
1.14.2.1	15-Aug-2007	skrll	Sync with HEAD.
1.15.2.2	04-Aug-2007	ad	Some significant performance improvements, and a fix for a race with pthread detach/join. - Make mutex acquire spin for a short time, as done with spinlocks. - Make the number of spins controllable with the env var PTHREAD_NSPINS. - Reduce the amount of time that libpthread internal spinlocks are held. - Rely more on the barrier effects of park/unpark to avoid taking spinlocks. - Simplify the locking around pthreads and the global queues. - Align per-thread sync data on a 128 byte boundary. - Offset thread stacks by a small amount to try and reduce cache thrash.
1.15.2.1	04-Aug-2007	ad	file sem.c was added on branch matt-mips64 on 2007-08-04 13:37:51 +0000
1.16.2.2	09-Jan-2008	matt	sync with HEAD
1.16.2.1	06-Nov-2007	matt	sync with HEAD
1.19.4.1	18-May-2008	yamt	sync with head.
1.21.10.1	17-Apr-2012	yamt	sync with head
1.21.2.2	14-Nov-2008	ad	Replace semid_t with intptr_t. No function change. This is a libc/kernel private interface and so the name change should not affect any third party code.
1.21.2.1	14-Nov-2008	ad	file sem.c was added on branch christos-time_t on 2008-11-14 15:49:21 +0000
1.24.32.1	10-Jun-2019	christos	Sync with HEAD
1.3	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.2	21-Jan-2003	wiz	Replace -1 with \-1.
1.1	21-Jan-2003	christos	add manual pages.
1.3	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.2	21-Jan-2003	wiz	New sentence, new line.
1.1	21-Jan-2003	christos	add manual pages.
1.2	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.1	21-Jan-2003	christos	add manual pages.
1.3	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.2	21-Jan-2003	wiz	Replace -1 with \-1.
1.1	21-Jan-2003	christos	add manual pages.
1.2	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.1	21-Jan-2003	christos	add manual pages.
1.4	24-Jan-2003	thorpej	p1003.1b semaphore manual pages have been moved to librt.
1.3	21-Jan-2003	wiz	New sentence, new line.
1.2	21-Jan-2003	jdolecek	.Rv needs a function name as parameter
1.1	21-Jan-2003	christos	add manual pages.
1.20	31-Mar-2025	riastradh	libpthread(3): Add missing cancellation points. - accept4 - tcdrain XXX Should our nonstandard alias paccept(2) also be a cancellation point? PR lib/59240: POSIX.1-2024: cancellation point audit
1.19	24-Apr-2019	kamil	branches: 1.19.12; Bump the libpthread(3) minor number to 4 Added C11 Threading library support.
1.18	09-Sep-2018	maya	Add a todo item for a future major bump (rename many symbols)
1.17	23-Apr-2016	christos	branches: 1.17.14; 1.17.16; bump
1.16	03-Apr-2013	christos	bump for pthread_cond_setclock
1.15	08-Mar-2012	joerg	branches: 1.15.2; Implement sem_timedwait.
1.14	11-Jan-2009	christos	branches: 1.14.8; 1.14.10; merge christos-time_t
1.13	28-Dec-2008	ad	branches: 1.13.2; Some things to do on major bump.
1.12	24-Dec-2007	ad	- Fix pthread_rwlock_trywrlock() which was broken. - Add new functions: pthread_mutex_held_np, mutex_owner_np, rwlock_held_np, rwlock_wrheld_np, rwlock_rdheld_np. These match the kernel's locking primitives and can be used when porting kernel code to userspace. - Always create LWPs detached. Do join/exit sync mostly in userland. When looped on a dual core box this seems ~30% quicker than using lwp_wait(). Reduce number of lock acquire/release ops during thread exit.
1.11	27-Nov-2007	ad	Bump libc/libpthread minor for thr_curcpu()/pthread_curcpu_np().
1.10	13-Nov-2007	ad	Crank libpthread to 0.8. It now uses _lwp_ctl(), and it's handy to keep 0.7 hanging around for old kernels.
1.9	09-Feb-2007	ad	branches: 1.9.6; Bump libpthread & libpthread_dbg minor versions so that an old SA copy gets kept in the file system. Requested by pavel.
1.8	18-Mar-2005	kleink	Interpose cancellation points in pollts() and pselect(), bringing us to libc.so.12.127 and libpthread.so.0.6.
1.7	21-May-2004	christos	branches: 1.7.2; bump the version of this too.
1.6	02-Jan-2004	cl	- libc.so.12.109 and libpthread.so.0.4 - add ssize_t stackinfo_offset argument to sa_register syscall - remove sa_unblockyield syscall - make __sigprocmask14 syscall weak - in pthread__sa_start: catch up with 4-argument sa_register syscall
1.5	18-Nov-2003	thorpej	Bump libc to 12.107 and libpthread to 0.3 for fsync_range(2).
1.4	26-Feb-2003	thorpej	Add support for naming a thread, using an API compatible with Tru64 Unix: * pthread_attr_getname_np() * pthread_attr_setname_np() * pthread_getname_np() * pthread_setname_np() In addition to being query'able by the application (for log messages, etc.), it is intended that these names can show up in the debugger. Reviewed by nathanw.
1.3	20-Jan-2003	christos	add support for p1003.1b semaphores. From FreeBSD
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file shlib_version was initially added on branch nathanw_sa.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.7.2.1	20-Mar-2005	tron	Pull up revision 1.8 (requested by kleink in ticket #27): Interpose cancellation points in pollts() and pselect(), bringing us to libc.so.12.127 and libpthread.so.0.6.
1.9.6.1	09-Jan-2008	matt	sync with HEAD
1.13.2.2	28-Dec-2008	ad	Some things to do on major bump.
1.13.2.1	28-Dec-2008	ad	file shlib_version was added on branch christos-time_t on 2008-12-28 11:01:59 +0000
1.14.10.1	20-Apr-2013	bouyer	Pull up following revision(s) (requested by christos in ticket #863) via patch: distrib/sets/lists/base/ad.mips64eb: patch distrib/sets/lists/base/ad.mips64el: patch distrib/sets/lists/base/md.amd64: patch distrib/sets/lists/base/md.sparc64: patch distrib/sets/lists/base/shl.mi: patch distrib/sets/lists/comp/ad.mips64eb: patch distrib/sets/lists/comp/ad.mips64el: patch distrib/sets/lists/comp/md.amd64: patch distrib/sets/lists/comp/md.sparc64: patch distrib/sets/lists/comp/shl.mi: patch lib/libpthread/shlib_version: patch bump libpthread minor for pthread_cond_setclock to libpthread.so.1.1. Note that this is not the same as libpthread.so.1.1 from HEAD.
1.14.8.2	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.14.8.1	17-Apr-2012	yamt	sync with head
1.15.2.1	23-Jun-2013	tls	resync from head
1.17.16.1	10-Jun-2019	christos	Sync with HEAD
1.17.14.1	30-Sep-2018	pgoyette	Ssync with HEAD
1.19.12.1	02-Aug-2025	perseant	Sync with HEAD
1.3	27-Apr-2019	wiz	branches: 1.3.2; Fix some typos, improve wording.
1.2	24-Apr-2019	kamil	Introduce minor changes to the C11 threading library Switch tss_t type from int to pthread_key_t (no functional change as pthread_key_t was already typedefed as int). Noted by <enh from Google>. Use C11 _Noreturn in thrd_exit(3) instead of NetBSD specific __dead. The former is documented in the standard as an attribute of thrd_exit(3), the latter is more portable to pre-C11 compilers, however C11 thread support library needs C11 compiler for TLS anyway. __dead made a little bit more point 3 years ago than today as 3 years ago pre-C11 compilers were more common.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.3.2.2	10-Jun-2019	christos	Sync with HEAD
1.3.2.1	27-Apr-2019	christos	file thrd.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.4	10-Sep-2019	kamil	Switch back _Noreturn to __dead in C11 threads There is an ongoing discussion to unify unreturn attribute between C and C++, making a compatible version, shared between languages. Instead of picking C11-only approach here, switch back to __dead that wraps the compiler extension for the same purpose. This change makes this header more compatible with C++ and pre-C11. Reference: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf
1.3	29-Apr-2019	kamil	branches: 1.3.2; 1.3.4; Avoid incompatible function pointer casts in thrd_create(3) Use an intermediate function trampoline to workaround different function pointer prototypes. While there, correct scenario returning thrd_nomem from thrd_create(3). In practice ENOMEM is rarely returned from pthread(3). Older code worked on tested ports, but was depending on unneeded UB.
1.2	24-Apr-2019	kamil	Introduce minor changes to the C11 threading library Switch tss_t type from int to pthread_key_t (no functional change as pthread_key_t was already typedefed as int). Noted by <enh from Google>. Use C11 _Noreturn in thrd_exit(3) instead of NetBSD specific __dead. The former is documented in the standard as an attribute of thrd_exit(3), the latter is more portable to pre-C11 compilers, however C11 thread support library needs C11 compiler for TLS anyway. __dead made a little bit more point 3 years ago than today as 3 years ago pre-C11 compilers were more common.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.3.4.1	13-Sep-2019	martin	Pull up following revision(s) (requested by kamil in ticket #198): lib/libpthread/thrd.c: revision 1.4 lib/libpthread/threads.h: revision 1.3 Switch back _Noreturn to __dead in C11 threads There is an ongoing discussion to unify unreturn attribute between C and C++, making a compatible version, shared between languages. Instead of picking C11-only approach here, switch back to __dead that wraps the compiler extension for the same purpose. This change makes this header more compatible with C++ and pre-C11. Reference: <a rel="nofollow" href="http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf">http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf</a>
1.3.2.3	13-Apr-2020	martin	Mostly merge changes from HEAD upto 20200411
1.3.2.2	10-Jun-2019	christos	Sync with HEAD
1.3.2.1	29-Apr-2019	christos	file thrd.c was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.2	27-Apr-2019	wiz	branches: 1.2.2; Fix some typos, improve wording.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	27-Apr-2019	christos	file threads.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.3	10-Sep-2019	kamil	Switch back _Noreturn to __dead in C11 threads There is an ongoing discussion to unify unreturn attribute between C and C++, making a compatible version, shared between languages. Instead of picking C11-only approach here, switch back to __dead that wraps the compiler extension for the same purpose. This change makes this header more compatible with C++ and pre-C11. Reference: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf
1.2	24-Apr-2019	kamil	branches: 1.2.2; 1.2.4; Introduce minor changes to the C11 threading library Switch tss_t type from int to pthread_key_t (no functional change as pthread_key_t was already typedefed as int). Noted by <enh from Google>. Use C11 _Noreturn in thrd_exit(3) instead of NetBSD specific __dead. The former is documented in the standard as an attribute of thrd_exit(3), the latter is more portable to pre-C11 compilers, however C11 thread support library needs C11 compiler for TLS anyway. __dead made a little bit more point 3 years ago than today as 3 years ago pre-C11 compilers were more common.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.4.1	13-Sep-2019	martin	Pull up following revision(s) (requested by kamil in ticket #198): lib/libpthread/thrd.c: revision 1.4 lib/libpthread/threads.h: revision 1.3 Switch back _Noreturn to __dead in C11 threads There is an ongoing discussion to unify unreturn attribute between C and C++, making a compatible version, shared between languages. Instead of picking C11-only approach here, switch back to __dead that wraps the compiler extension for the same purpose. This change makes this header more compatible with C++ and pre-C11. Reference: <a rel="nofollow" href="http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf">http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2410.pdf</a>
1.2.2.3	13-Apr-2020	martin	Mostly merge changes from HEAD upto 20200411
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	24-Apr-2019	christos	file threads.h was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.2	27-Apr-2019	wiz	branches: 1.2.2; Fix some typos, improve wording.
1.1	24-Apr-2019	kamil	Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.2.2.2	10-Jun-2019	christos	Sync with HEAD
1.2.2.1	27-Apr-2019	christos	file tss.3 was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.2	15-Dec-2019	uwe	Drop bogus _DIAGASSERT that don't even compile.
1.1	24-Apr-2019	kamil	branches: 1.1.2; Add a complete C11 threads(3) implementation C11 Thread support library is a portable threading C API between OSs, similar to std::threads in the C++ world. The library is implemented as a thin shim over POSIX interfaces. NetBSD implements the API as a part of the POSIX threading library (libpthread(3)). C11 threads(3) are in the process of making them an integral part of the POSIX standard. The interface has been implemented in major OSs and used with stopgap libraries for older versions of them. C11 threading library is already used (with a stopgap implementation) in the NetBSD distribution in MESA. Original implementation by myself from 2016. ATF tests are new and cover almost all interfaces. Proposed on tech-userlevel@.
1.1.2.3	08-Apr-2020	martin	Merge changes from current as of 20200406
1.1.2.2	10-Jun-2019	christos	Sync with HEAD
1.1.2.1	24-Apr-2019	christos	file tss.c was added on branch phil-wifi on 2019-06-10 22:05:26 +0000
1.2	25-May-2023	riastradh	libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.1	10-Aug-2014	matt	branches: 1.1.4; 1.1.18; 1.1.28; 1.1.36; Preliminary files for AARCH64 (64-bit ARM) support. Enough for a distribution build.
1.1.36.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.1.28.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.1.18.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.1.4.2	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.1.4.1	10-Aug-2014	tls	file pthread_md.h was added on branch tls-maxphys on 2014-08-20 00:02:20 +0000
1.5	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.4	28-Apr-2008	martin	branches: 1.4.8; Remove clause 3 and 4 from TNF licenses
1.3	08-Oct-2007	skrll	branches: 1.3.6; Provide PTHREAD__ASM_RASOPS for alpha. The gcc generated lock try RAS is broken as the store needs to be the last instruction.
1.2	18-Jan-2003	thorpej	branches: 1.2.24; Merge the nathanw_sa branch.
1.1	25-Sep-2001	nathanw	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.3	14-Jan-2003	nathanw	Save and restore process-unique value.
1.1.2.2	17-Dec-2001	nathanw	Update to work with Klaus's mcontext code. Save and restore FP registers.
1.1.2.1	25-Sep-2001	nathanw	Alpha MD files for the pthread lib.
1.2.24.1	06-Nov-2007	matt	sync with HEAD
1.3.6.1	18-May-2008	yamt	sync with head.
1.4.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.4.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	28-Apr-2008	martin	branches: 1.7.8; Remove clause 3 and 4 from TNF licenses
1.6	02-Mar-2007	ad	branches: 1.6.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	17-Jul-2003	nathanw	Adapt to structure name changes.
1.3	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	25-Sep-2001	nathanw	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.3	14-Jan-2003	nathanw	Save and restore process-unique value.
1.1.2.2	17-Dec-2001	nathanw	Update to work with Klaus's mcontext code.
1.1.2.1	25-Sep-2001	nathanw	Alpha MD files for the pthread lib.
1.6.12.1	18-May-2008	yamt	sync with head.
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.1	18-May-2009	njoly	Restore PTHREAD__ASM_RASOPS for alpha (from _context_u.S), that was lost in previous cleanup. ok by ad@.
1.1	22-Nov-2024	riastradh	branches: 1.1.4; libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.1.4.2	02-Aug-2025	perseant	Sync with HEAD
1.1.4.1	22-Nov-2024	perseant	file pthread_md.expsym was added on branch perseant-exfatfs on 2025-08-02 05:54:56 +0000
1.7	25-Jan-2011	christos	make pthread__sp unsigned long.
1.6	16-May-2009	ad	branches: 1.6.2; Remove unused code that's confusing when using cscope/opengrok.
1.5	28-Apr-2008	martin	branches: 1.5.8; Remove clause 3 and 4 from TNF licenses
1.4	08-Oct-2007	skrll	branches: 1.4.6; Provide PTHREAD__ASM_RASOPS for alpha. The gcc generated lock try RAS is broken as the store needs to be the last instruction.
1.3	24-Dec-2005	perry	branches: 1.3.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	25-Sep-2001	nathanw	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.7	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.6	06-Dec-2002	nathanw	ucontext/sigcontext glue.
1.1.2.5	22-Oct-2002	nathanw	Define _INITCONTEXT_U_MD() to set the status register to a reasonable value.
1.1.2.4	06-Aug-2002	nathanw	Add struct reg/mcontext conversion glue.
1.1.2.3	17-Dec-2001	nathanw	Update to work with Klaus's mcontext code.
1.1.2.2	14-Nov-2001	briggs	Add pthread__uc_pc() to pthread_md.h instead of making assumptions about the contents of the m.d. mcontext.
1.1.2.1	25-Sep-2001	nathanw	Alpha MD files for the pthread lib.
1.3.12.1	06-Nov-2007	matt	sync with HEAD
1.4.6.1	18-May-2008	yamt	sync with head.
1.5.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.5.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.6.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.6	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.3	12-Jun-2003	nathanw	Two fixes: * In switch-away cases, write PT_SWITCHTO last (after PT_SWITCHTOUC), so that pthread__resolve_locks() doesn't see an empty SWITCHTOUC value. This also permits pthread__resolve_locks() to use the presence of PT_SWITCHTO as a sign that the thread has done all of its necessary chain work. * Make the return-point of pthread__switch global and visible, so that its address can be compared to the PC of a thread, again as a sign that its chain-work is done. (other architectures in progress, after they get the previous asm fix...)
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	25-Sep-2001	nathanw	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.3	13-Jan-2003	nathanw	Rewrite pthread__switch() and adjust pthread__locked_switch() to avoid storing the new saved-context pointer while still using the old stack. This avoids a race condition with pthread__find_interrupted() where a thread could lose its old state if it was interrupted in a certain window in pthread__switch().
1.1.2.2	17-Dec-2001	nathanw	Update to work with Klaus's mcontext code.
1.1.2.1	25-Sep-2001	nathanw	Alpha MD files for the pthread lib.
1.5	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.4	21-Aug-2004	rearnsha	Use RET macro for returning.
1.3	05-Apr-2003	bjh21	NetBSD/acorn26 has used APCS-32 for years, so unifdef -U__APCS_26__.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	16-Nov-2001	thorpej	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.8	27-Nov-2001	bjh21	In GETC(), rather than faking a CPSR, save the real one if we're can, and zero otherwise (ie if we're on a 26-bit CPU). I suspect this isn't actually necessary, but it's cheap, and it should make it easier for debuggers and suchlike to work out what's going on.
1.1.2.7	22-Nov-2001	bjh21	_UC_USER \| _UC_CPU happens to be a valid ARM constant, so we can load it in a single cycle.
1.1.2.6	22-Nov-2001	thorpej	In the GETC() macro, don't actually save r14 (lr) and r15 (pc). r14 is caller-save, so we don't need to save it in the _REG_LR slot. Instead, we save it in the _REG_PC slot so that when the context is resumed, we end up at the insn after the call site. Fixes the "cu6" test in Nathan's test suite. "cu1" - "cu5" also function correctly (as they did before this change).
1.1.2.5	21-Nov-2001	thorpej	ome improvements, based on suggestions from Ben Harris: * Don't need to save CPSR in GETC(), since it's a caller-saved register. However, stuff a fake one (that indicates USR32 mode) into the ucontext in case it is used later in a setcontext(2) system call (as is done in one of Nathan's regression tests; this last bit from me). * Only restore CPSR if ! _UC_USER (i.e. context was created by getcontext(2)). * Determine at run-time if we're in USR26 or USR32 by forcing the Z flag to be set and then comparing the PC portion of R15 to all of R15 (if they're not equal, we're in 26-bit mode). * Restore banked regs properly in 26-bit mode. Plus one from me: Don't or _UC_USER \| _UC_CPU into uc_flags; set uc_flags to that value instead.
1.1.2.4	20-Nov-2001	thorpej	Clean up SAVE_FLAGS/RESTORE_FLAGS, and make sure to fetch the flags from the correct place in the ucontext (not past the END of the ucontext) in the SETC() macro.
1.1.2.3	20-Nov-2001	thorpej	Make sure to set _UC_CPU in _getcontext_u().
1.1.2.2	18-Nov-2001	thorpej	Note that we need to think about what to do regarding hard and soft FP context.
1.1.2.1	16-Nov-2001	thorpej	First cut at machine-dependent pthread bits for ARM.
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	17-Jul-2003	nathanw	Adapt to structure name changes.
1.4	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.3	13-Mar-2003	thorpej	Include <sys/types> before <sys/lock.h>, shuffle <ucontext.h>.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	16-Nov-2001	thorpej	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.2	22-Nov-2001	thorpej	Move the _REG_PC definition up with the other _REG_* definitions.
1.1.2.1	16-Nov-2001	thorpej	First cut at machine-dependent pthread bits for ARM.
1.13	25-May-2023	riastradh	libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.12	25-May-2023	riastradh	libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) XXX pullup-10
1.11	22-Nov-2018	skrll	branches: 1.11.2; 1.11.10; G/C __APCS_26__ support
1.10	17-Jul-2017	skrll	branches: 1.10.2; 1.10.4; 1.10.6; Typo in comment
1.9	15-Aug-2013	matt	branches: 1.9.18; Use the thumb1 versions of sev/wfe for thumb && armv6+. if using armv5t don't do anything for thumb.
1.8	19-Sep-2012	matt	Use .inst instead of wfe/sev to shut up gas.
1.7	16-Aug-2012	matt	branches: 1.7.2; Add a pthread__smt_wake and add support for it on arm along with pthread__smt_pause. These are implemented using the ARM instructions SEV (wake) and WFE (pause). These are treated as NOPs on ARM CPUs that don't support them.
1.6	25-Jan-2011	christos	branches: 1.6.4; make pthread__sp unsigned long.
1.5	16-May-2009	ad	branches: 1.5.2; Remove unused code that's confusing when using cscope/opengrok.
1.4	24-Dec-2005	perry	Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	18-Jan-2003	christos	add missing backslash
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	16-Nov-2001	thorpej	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.4	17-Jan-2003	nathanw	Add _INITCONTEXT_U_MD() code that sets up the PC or CPSR. Adjust PTHREAD_UCONTEXT_TO_REG() to set a plausable value in reg->r_cpsr when _UC_USER is set in the ucontext; otherwise, GDB gets very confused and thinks it's dealing with 26-bit ARM state.
1.1.2.3	20-Dec-2002	thorpej	Update for mcontext_t changes.
1.1.2.2	06-Aug-2002	thorpej	Add glue for libpthread_dbg.
1.1.2.1	16-Nov-2001	thorpej	First cut at machine-dependent pthread bits for ARM.
1.5.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.6.4.2	22-May-2014	yamt	sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments")
1.6.4.1	30-Oct-2012	yamt	sync with head
1.7.2.2	20-Aug-2014	tls	Rebase to HEAD as of a few days ago.
1.7.2.1	20-Nov-2012	tls	Resync to 2012-11-19 00:00:00 UTC
1.9.18.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.10.6.1	10-Jun-2019	christos	Sync with HEAD
1.10.4.1	26-Nov-2018	pgoyette	Sync with HEAD, resolve a couple of conflicts
1.10.2.2	17-Jul-2017	skrll	2167115
1.10.2.1	17-Jul-2017	skrll	file pthread_md.h was added on branch perseant-stdc-iso10646 on 2017-07-17 20:24:08 +0000
1.11.10.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.11.2.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.9	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.8	21-Aug-2004	rearnsha	Use RET macro for returning.
1.7	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.6	24-Jul-2003	skrll	Typo in comment.
1.5	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.4	12-Jun-2003	nathanw	Two fixes: * In switch-away cases, write PT_SWITCHTO last (after PT_SWITCHTOUC), so that pthread__resolve_locks() doesn't see an empty SWITCHTOUC value. This also permits pthread__resolve_locks() to use the presence of PT_SWITCHTO as a sign that the thread has done all of its necessary chain work. * Make the return-point of pthread__switch global and visible, so that its address can be compared to the PC of a thread, again as a sign that its chain-work is done. (other architectures in progress, after they get the previous asm fix...)
1.3	05-Apr-2003	bjh21	NetBSD/acorn26 has used APCS-32 for years, so unifdef -U__APCS_26__.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	16-Nov-2001	thorpej	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.3	14-Jan-2003	nathanw	Rewrite pthread__switch() to avoid storing the new saved-context pointer while still using the old stack. This avoids a race condition with pthread__find_interrupted() where a thread could lose its old state if it was interrupted in a certain window in pthread__switch().
1.1.2.2	22-Nov-2001	bjh21	Correct a typo in STACK_SWITCH(), where it used the wrong register to compute the stack pointer. This patch gets test "cond2" working on ARM.
1.1.2.1	16-Nov-2001	thorpej	First cut at machine-dependent pthread bits for ARM.
1.5	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.4	11-Aug-2008	skrll	branches: 1.4.6; Remove unnecessary include.
1.3	28-Apr-2008	martin	branches: 1.3.2; Remove clause 3 and 4 from TNF licenses
1.2	24-Sep-2007	skrll	branches: 1.2.6; Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.1	19-Jul-2004	chs	branches: 1.1.18; add hppa MD libpthread bits. translated from MIPS.
1.1.18.1	06-Nov-2007	matt	sync with HEAD
1.2.6.1	18-May-2008	yamt	sync with head.
1.3.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.4.6.2	11-Aug-2008	skrll	Remove unnecessary include.
1.4.6.1	11-Aug-2008	skrll	file _context_u.S was added on branch christos-time_t on 2008-08-11 21:45:25 +0000
1.4	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.3	28-Apr-2008	martin	branches: 1.3.8; Remove clause 3 and 4 from TNF licenses
1.2	02-Mar-2007	ad	branches: 1.2.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.1	19-Jul-2004	chs	add hppa MD libpthread bits. translated from MIPS.
1.2.12.1	18-May-2008	yamt	sync with head.
1.3.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.3.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.2	19-May-2022	skrll	Use RAS_{START,END}_ASM_HIDDEN
1.1	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.1	22-Nov-2024	riastradh	branches: 1.1.4; libpthread: Fix expected symbols on alpha and hppa. These have PTHREAD__ASM_RASOPS and define a different subset of symbols which get exported. None of these pthread__ras_* and pthread__lock_* symbols _should_ be exported but we can fix that in a future revbump. PR lib/58838: shared libraries in base should all have expsym lists
1.1.4.2	02-Aug-2025	perseant	Sync with HEAD
1.1.4.1	22-Nov-2024	perseant	file pthread_md.expsym was added on branch perseant-exfatfs on 2025-08-02 05:54:56 +0000
1.8	25-Jan-2011	christos	make pthread__sp unsigned long.
1.7	16-May-2009	ad	branches: 1.7.2; Remove unused code that's confusing when using cscope/opengrok.
1.6	28-Apr-2008	martin	branches: 1.6.8; Remove clause 3 and 4 from TNF licenses
1.5	10-Feb-2008	ad	branches: 1.5.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.4	24-Sep-2007	skrll	Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.3	24-Dec-2005	perry	branches: 1.3.12; __asm__ -> __asm
1.2	24-Dec-2005	perry	Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.1	19-Jul-2004	chs	add hppa MD libpthread bits. translated from MIPS.
1.3.12.2	23-Mar-2008	matt	sync with HEAD
1.3.12.1	06-Nov-2007	matt	sync with HEAD
1.5.4.1	18-May-2008	yamt	sync with head.
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.2	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.1	19-Jul-2004	chs	add hppa MD libpthread bits. translated from MIPS.
1.3	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.2	07-Jan-1994	mycroft	Delete special rules for syscall.S; they are not needed, and one of them is wrong anyway.
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.10	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.9	28-Apr-2008	martin	branches: 1.9.8; Remove clause 3 and 4 from TNF licenses
1.8	10-Feb-2008	ad	branches: 1.8.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.7	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.6	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.5	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.4	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.3	07-Sep-2007	ad	Add: pthread__atomic_cas_ptr, pthread__atomic_swap_ptr, pthread__membar_full This is a stopgap until the thorpej-atomic branch is complete.
1.2	18-Jan-2003	thorpej	branches: 1.2.20; 1.2.24; Merge the nathanw_sa branch.
1.1	13-Jul-2001	nathanw	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.10	06-Sep-2002	nathanw	In the xmm case, FPSAVE should be "fxsave", and FPLOAD should be "fxrstor", not the other way around. Note to self: Lay off the crack.
1.1.2.9	14-Aug-2002	nathanw	Define, initialize, and use function pointers for _{set,get,swap}context_u routines, with different versions for saving FP state with fnsave or fxsave, depending on the machdep.osfxsr sysctl.
1.1.2.8	24-Apr-2002	nathanw	Save FP state in user context switches. XXX1: doing something clever about lazy-FP-switching would be good. XXX2: coping with SSE/SSE2 regsisters would also be good.
1.1.2.7	01-Mar-2002	nathanw	Restore FP state if the kernel handed us any. [xmms no longer sounds like it's playing Play-Skool LPs]
1.1.2.6	11-Feb-2002	nathanw	Implement _UC_USER for i386: only save callee-save registers, and set a flag saying so; on restore, if that flag is set, only restore the callee-save registers. Speeds up the user-only version of these routines by 35-40% on a Pentium MMX 233.
1.1.2.5	04-Sep-2001	nathanw	Generate and use symbolic constants for register offsets in mcontext_t, instead of hand-coding offset numbers.
1.1.2.4	02-Aug-2001	nathanw	Don't bother even storing 0s into the fields for the caller-save registers (eax, ecx, edx) and unused fields (esp, trapno, err). Still need to deal more sanely with segment registers.
1.1.2.3	02-Aug-2001	nathanw	Adjust SETC (used by _setcontext_u and _getcontext_u) to not set the new stack pointer until all the possibly-interesting data below the new SP has been preserved. Unfortunately, it's about 3% slower.
1.1.2.2	31-Jul-2001	nathanw	Whitespace cleanup.
1.1.2.1	13-Jul-2001	nathanw	Make userlevel-only *context functions part of libpthread rather than libc.
1.2.24.3	23-Mar-2008	matt	sync with HEAD
1.2.24.2	09-Jan-2008	matt	sync with HEAD
1.2.24.1	06-Nov-2007	matt	sync with HEAD
1.2.20.1	10-Sep-2007	skrll	Sync with HEAD.
1.8.4.1	18-May-2008	yamt	sync with head.
1.9.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.9.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.9	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.8	07-Jul-2008	gmcgarry	branches: 1.8.6; Selector registers are 16-bit and binutils 2.18 insists that only 16-bit accesses are permitted on them. Therefore, change movl to movw. No change to machine code generated.
1.7	28-Apr-2008	martin	branches: 1.7.2; Remove clause 3 and 4 from TNF licenses
1.6	20-Jan-2007	christos	branches: 1.6.12; fix warning about indirect call without *
1.5	30-Nov-2004	nathanw	Punt to setcontext() system call if the PSL_T bit (single-step trap) is set, so that the single-step trap happens in the thread's context and not in the middle of _setcontext_u. XXX might be able to do something here with iret, too, but it needs more testing.
1.4	10-Nov-2004	kent	save&restore %fs and %gs registers for USER_LDT applications. PR#26900
1.3	30-Oct-2003	yamt	branches: 1.3.2; use explicit "l" suffixes. (eg. lea -> leal)
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	14-Aug-2002	nathanw	branches: 1.1.2; file _getsetc.S was initially added on branch nathanw_sa.
1.1.2.4	22-Oct-2002	skrll	RCSId police.
1.1.2.3	04-Sep-2002	nathanw	The _UC_USER_BIT case of SETC (currently) needs to load FP state. Found by inspection.
1.1.2.2	15-Aug-2002	nathanw	Bit values are not the same as bit positions; fix the test for the _UC_FPU flag.
1.1.2.1	14-Aug-2002	nathanw	Define, initialize, and use function pointers for _{set,get,swap}context_u routines, with different versions for saving FP state with fnsave or fxsave, depending on the machdep.osfxsr sysctl.
1.3.2.1	12-Nov-2004	jmc	Pullup rev 1.4 (requested by kent in ticket #969) save&restore %fs and %gs registers for USER_LDT applications. PR#26900
1.6.12.1	18-May-2008	yamt	sync with head.
1.7.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.8.6.2	07-Jul-2008	gmcgarry	Selector registers are 16-bit and binutils 2.18 insists that only 16-bit accesses are permitted on them. Therefore, change movl to movw. No change to machine code generated.
1.8.6.1	07-Jul-2008	gmcgarry	file _getsetc.S was added on branch christos-time_t on 2008-07-07 13:07:56 +0000
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	28-Apr-2008	martin	branches: 1.7.8; Remove clause 3 and 4 from TNF licenses
1.6	02-Mar-2007	ad	branches: 1.6.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	17-Jul-2003	nathanw	Adapt to structure name changes.
1.3	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.9	14-Aug-2002	nathanw	Define, initialize, and use function pointers for _{set,get,swap}context_u routines, with different versions for saving FP state with fnsave or fxsave, depending on the machdep.osfxsr sysctl.
1.1.2.8	25-Mar-2002	nathanw	Define a couple of constants for FP register use.
1.1.2.7	11-Feb-2002	nathanw	Implement _UC_USER for i386: only save callee-save registers, and set a flag saying so; on restore, if that flag is set, only restore the callee-save registers. Speeds up the user-only version of these routines by 35-40% on a Pentium MMX 233.
1.1.2.6	04-Sep-2001	nathanw	Generate and use symbolic constants for register offsets in mcontext_t, instead of hand-coding offset numbers.
1.1.2.5	04-Sep-2001	nathanw	Define STACKSPACE in pthread_md.h, not directly in pthread_switch.S
1.1.2.4	01-Aug-2001	nathanw	Create an offset for pt_sleepuc.
1.1.2.3	31-Jul-2001	nathanw	Create an asm symbol for the offset of EIP in the ucontext.
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.6.12.1	18-May-2008	yamt	sync with head.
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.4	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.3	07-Feb-1994	proven	More wrapper functions, and some hacks for machine independent sleep mechanisms.
1.2	20-Dec-1993	proven	Copyrights added to each file.
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.4	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.3	20-Dec-1993	proven	Copyrights added to each file.
1.2	15-Nov-1993	proven	OK one more try at getting it right ...
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.7	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.6	29-Mar-2009	ad	- Make the threadreg code use _lwp_setprivate() instead of MD hooks. XXX This must not be enabled by default because the LWP private mechanism is reserved for TLS. It is provided only as a test/demo. XXX Since ucontext_t does not contain the thread private variable, for a short time after threads are created their thread specific data is unset. If a signal arrives during that time we are screwed. - No longer need pthread__osrev. - Rearrange _lwp_ctl() calls slightly.
1.5	28-Apr-2008	martin	branches: 1.5.8; 1.5.10; Remove clause 3 and 4 from TNF licenses
1.4	13-Nov-2007	ad	branches: 1.4.6; Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.3	08-Mar-2003	lukem	branches: 1.3.24; add __RCSID()
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	15-Aug-2002	nathanw	branches: 1.1.2; file pthread_md.c was initially added on branch nathanw_sa.
1.1.2.1	15-Aug-2002	nathanw	Actually add this file.
1.3.24.1	09-Jan-2008	matt	sync with HEAD
1.4.6.1	18-May-2008	yamt	sync with head.
1.5.10.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.5.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.5.8.1	28-Apr-2008	martin	file pthread_md.c was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.21	25-May-2023	riastradh	libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.20	02-Mar-2012	joerg	branches: 1.20.24; 1.20.34; 1.20.42; Avoid getcontext() as it triggers clobbering warnings. Use inline assembler to get the fields directly. Saves a system call as side effect.
1.19	24-Feb-2011	joerg	branches: 1.19.4; Allow storing and receiving the LWP private pointer via ucontext_t on all platforms except VAX and IA64. Add fast access via register for AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace the stack based pthread_self(). Implement skeleton support for Alpha, HPPA, PowerPC, SPARC and SPARC64, but leave it disabled. Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in machine/types.h and a corresponding __lwp_getprivate_fast in machine/mcontext.h. This material is based upon work partially supported by The NetBSD Foundation under a contract with Joerg Sonnenberger.
1.18	25-Jan-2011	christos	make pthread__sp unsigned long.
1.17	16-May-2009	ad	branches: 1.17.2; Remove unused code that's confusing when using cscope/opengrok.
1.16	29-Mar-2009	ad	- Make the threadreg code use _lwp_setprivate() instead of MD hooks. XXX This must not be enabled by default because the LWP private mechanism is reserved for TLS. It is provided only as a test/demo. XXX Since ucontext_t does not contain the thread private variable, for a short time after threads are created their thread specific data is unset. If a signal arrives during that time we are screwed. - No longer need pthread__osrev. - Rearrange _lwp_ctl() calls slightly.
1.15	23-Jun-2008	ad	branches: 1.15.6; 1.15.8; pthread__threadreg_get: mark it const.
1.14	28-Apr-2008	martin	branches: 1.14.2; Remove clause 3 and 4 from TNF licenses
1.13	22-Mar-2008	ad	branches: 1.13.2; Cheat and add inlines for _atomic_cas_ptr() to work around gcc emitting unneeded PIC stuff in mutex_lock() and mutex_unlock(), when a thread register is used.
1.12	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.11	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.10	24-Sep-2007	skrll	Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.9	08-Sep-2007	ad	- Get rid of self->pt_mutexhint and use pthread__mutex_owned() instead. - Update some comments and fix minor bugs. Minor cosmetic changes. - Replace some spinlocks with mutexes and rwlocks. - Change the process private semaphores to use mutexes and condition variables instead of doing the synchronization directly. Spinlocks are no longer used by the semaphore code.
1.8	07-Sep-2007	ad	Add: pthread__atomic_cas_ptr, pthread__atomic_swap_ptr, pthread__membar_full This is a stopgap until the thorpej-atomic branch is complete.
1.7	29-Mar-2006	cube	branches: 1.7.8; 1.7.12; Instead of using hard-coded values for various registers, get them from the current context. Valid values can change depending on how the kernel is setup. i386 and amd64 happen to be setup differently.
1.6	24-Dec-2005	perry	Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.5	11-Feb-2004	nathanw	branches: 1.5.4; 1.5.6; Add ucontext conversion macros for an "extra" register set.
1.4	18-Jan-2003	christos	delint
1.3	18-Jan-2003	christos	de-lint
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.11	17-Jan-2003	thorpej	Include <sys/ucontext.h> to get ucontext_t for prototypes.
1.1.2.10	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.9	06-Dec-2002	nathanw	Clear _UC_USER bit when converting from sigcontext to ucontext.
1.1.2.8	22-Oct-2002	nathanw	Define _INITCONTEXT_U_MD() to set segment registers and flag register to sensible values.
1.1.2.7	21-Oct-2002	nathanw	Add some macros to convert between ucontext_t and struct sigcontext.
1.1.2.6	14-Aug-2002	nathanw	Define, initialize, and use function pointers for _{set,get,swap}context_u routines, with different versions for saving FP state with fnsave or fxsave, depending on the machdep.osfxsr sysctl.
1.1.2.5	24-Apr-2002	nathanw	Add macros to convert between struct ucontext and struct reg/fpreg.
1.1.2.4	14-Nov-2001	briggs	Add pthread__uc_pc() to pthread_md.h instead of making assumptions about the contents of the m.d. mcontext.
1.1.2.3	04-Sep-2001	nathanw	Define STACKSPACE in pthread_md.h, not directly in pthread_switch.S
1.1.2.2	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.5.6.1	19-Apr-2006	tron	Pull up following revision(s) (requested by cube in ticket #1265): lib/libpthread/arch/i386/pthread_md.h: revision 1.7 Instead of using hard-coded values for various registers, get them from the current context. Valid values can change depending on how the kernel is setup. i386 and amd64 happen to be setup differently.
1.5.4.1	21-Apr-2006	tron	Pull up following revision(s) (requested by cube in ticket #10448): lib/libpthread/arch/i386/pthread_md.h: revision 1.7 Instead of using hard-coded values for various registers, get them from the current context. Valid values can change depending on how the kernel is setup. i386 and amd64 happen to be setup differently.
1.7.12.3	23-Mar-2008	matt	sync with HEAD
1.7.12.2	09-Jan-2008	matt	sync with HEAD
1.7.12.1	06-Nov-2007	matt	sync with HEAD
1.7.8.1	10-Sep-2007	skrll	Sync with HEAD.
1.13.2.1	18-May-2008	yamt	sync with head.
1.14.2.1	18-Sep-2008	wrstuden	Sync with wrstuden-revivesa-base-2.
1.15.8.1	13-May-2009	jym	Sync with HEAD. Third (and last) commit. See http://mail-index.netbsd.org/source-changes/2009/05/13/msg221222.html
1.15.6.2	23-Jun-2008	ad	pthread__threadreg_get: mark it const.
1.15.6.1	23-Jun-2008	ad	file pthread_md.h was added on branch christos-time_t on 2008-06-23 10:39:39 +0000
1.17.2.2	05-Mar-2011	bouyer	Sync with HEAD
1.17.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.19.4.1	17-Apr-2012	yamt	sync with head
1.20.42.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.20.34.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.20.24.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.10	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.9	04-Jan-2006	skrll	A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.8	23-Apr-2004	simonb	branches: 1.8.2; s/the the/the/ (only in sources that aren't regularly imported from elsewhere).
1.7	30-Oct-2003	yamt	use explicit "l" suffixes. (eg. lea -> leal)
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.4	12-Jun-2003	nathanw	Two fixes: * In switch-away cases, write PT_SWITCHTO last (after PT_SWITCHTOUC), so that pthread__resolve_locks() doesn't see an empty SWITCHTOUC value. This also permits pthread__resolve_locks() to use the presence of PT_SWITCHTO as a sign that the thread has done all of its necessary chain work. * Make the return-point of pthread__switch global and visible, so that its address can be compared to the PC of a thread, again as a sign that its chain-work is done. (other architectures in progress, after they get the previous asm fix...)
1.3	10-Feb-2003	fvdl	Continue at the plain switch return point in pthread__switch, not the locked one, in the !PIC case. From Tor Egge via Havard Eidnes.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	05-Mar-2001	nathanw	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.18	02-Jan-2003	nathanw	Rewrite pthread__switch() and adjust pthread__locked_switch() to avoid storing the new saved-context pointer while still using the old stack. This avoids a race condition with pthread__find_interrupted() where a thread could lose its old state if it was interrupted in a certain window in pthread__switch() or pthread__locked_switch() (the latter was never actually observed, but appeared possible).
1.1.2.17	18-Dec-2002	nathanw	Comment whitespace.
1.1.2.16	18-Dec-2002	nathanw	Tweak ucontext-alignment code so that it consumes at most 12 bytes of stack space instead of 16, leaving 20 bytes avaliable.
1.1.2.15	16-Sep-2002	skrll	Fix typo in comment.
1.1.2.14	06-Sep-2002	nathanw	Ensure that stack regions allocated for storing ucontext_t's are aligned to 16-byte boundaries; this ensures that the XMM save areas are also 16-byte aligned, which is a requirement for use of the fxsave and fxrstor instructions.
1.1.2.13	14-Aug-2002	nathanw	Define, initialize, and use function pointers for _{set,get,swap}context_u routines, with different versions for saving FP state with fnsave or fxsave, depending on the machdep.osfxsr sysctl.
1.1.2.12	04-Sep-2001	nathanw	Define STACKSPACE in pthread_md.h, not directly in pthread_switch.S
1.1.2.11	01-Aug-2001	nathanw	Rework the whole" ucontext vs. temporary crud on the bottom of the stack" thing again, placing the burden of weirdness on STACK_SWITCH. Add a lot of comments to explain why this is so tricky, and document which functions are external. In the old_preempt case of pthread__locked switch, save the thread's real context so we don't try to switch back into the middle of this code more than once.
1.1.2.10	31-Jul-2001	nathanw	Increase paranoia about keeping the ucontext on the bottom of the stack: Find the location to put it, but don't move $esp there, so that subsequent caller-save arguments and return addresses are above it rather than below it.
1.1.2.9	31-Jul-2001	nathanw	Actually, we do need pthread__switch in assembler, in order that the ucontext_t be the last thing on the stack. Otherwise, the switch code will overwrite stack data, since it sets the stack to pt_uc. Use the UT_EIP symbolic constant. When performing a new_preempt, store into pt_switchto and pt_switchtouc of the new thread, so that resolve_locks stands a chance of finding the switchto victim.
1.1.2.8	26-Jul-2001	nathanw	pthread__switch() no longer needs to be implemeted in assembler, and doesn't have a lock parameter.
1.1.2.7	24-Jul-2001	nathanw	Substantial rework: - Make pthread__switch() just a plain switch, and move the switch-to-next code to pthread__switch_away. Saves a stack switch, test, and branch in the pthread_switch case, a _getcontext_u() and associated stack frobbing in the switch_away case, and several points of sanity. - Remove a poorly-thought-out ucontext-dodge in STACK_SWITCH. - Fill in PT_SWITCHTO and PT_SWITCHTOUC in the new_preempt path as well as the old_preempt path in pthread__locked_switch() and pthread__upcall_switch().
1.1.2.6	23-Jul-2001	nathanw	Pushing parameters on the stack is not the same as preserving their values.
1.1.2.5	20-Jul-2001	nathanw	The %esi and %edi registers are callee-save, not caller-save.
1.1.2.4	16-Jul-2001	nathanw	Make pthread__switch() actually decrement fake spinlock counts when told to do so by pthread__upcall_switch() or pthread__lock_switch().
1.1.2.3	13-Jul-2001	nathanw	Note copyright. Standardize RCS IDs.
1.1.2.2	29-Mar-2001	nathanw	Don't frob pt_spinlocks in pthread__switch; we don't use it for switching with locks held.
1.1.2.1	05-Mar-2001	nathanw	The beginnings of a scheduler activations-based pthread library.
1.8.2.1	08-Jan-2006	riz	Pull up following revision(s) (requested by skrll in ticket #1093): lib/libpthread/arch/sparc/pthread_switch.S: revision 1.8 lib/libpthread/arch/x86_64/pthread_switch.S: revision 1.11 lib/libpthread/arch/sparc64/pthread_switch.S: revision 1.9 lib/libpthread/arch/i386/pthread_switch.S: revision 1.9 A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.4	08-Oct-1997	scottr	This incarnation of the pthreads library is ancient and not useful, and should have been mothballed some time ago...
1.3	07-Feb-1994	proven	More wrapper functions, and some hacks for machine independent sleep mechanisms.
1.2	27-Jan-1994	mycroft	Stylistic change.
1.1	14-Nov-1993	proven	branches: 1.1.1; Initial revision
1.1.1.1	14-Nov-1993	proven	Initial release of the POSIX 1003.4a Draft 7 thread implementation.
1.1	17-Apr-2015	martin	Dummy ia64 support
1.6	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.5	28-Apr-2008	martin	branches: 1.5.8; Remove clause 3 and 4 from TNF licenses
1.4	12-Oct-2003	chs	branches: 1.4.32; fix typo in previous.
1.3	01-Mar-2003	scw	Don't use FP instructions when building for m68010. Fixes broken sun2 build. G/C some unused code.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	18-Nov-2001	scw	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.7	01-Dec-2001	scw	Small cleanup of FP register context goo.
1.1.2.6	25-Nov-2001	scw	Checkpoint user-land context switch glue. This code still needs some more thought, specifically for FPU context save/restore. On m68k, it is not possible to completely save/restore full FPU context from user-mode.
1.1.2.5	21-Nov-2001	scw	Don't bother stashing the CCR in the saved context; it's effectively a caller saved register. Instead, clear the full 32-bit REG_PS value in the context since the kernel's setcontext() call validates all 32-bits. Also overwrite uc_flags with _UC_CPU instead of a logical OR.
1.1.2.4	20-Nov-2001	scw	Can't "rts" at the end of _getcontext_u() since we've already popped the return address. Fortunately, it's in %a1 so just jmp to it.
1.1.2.3	19-Nov-2001	scw	Set the UC_CPU bit in UC_FLAGS for the GETC case. Pointed out by Nathan Williams.
1.1.2.2	19-Nov-2001	scw	Tweak the context save/restore code; the first cut was a bit too simplistic.
1.1.2.1	18-Nov-2001	scw	Initial cut of m68k-specific pthreads backend. Compiles, but testing will have to wait until I've had some sleep.
1.4.32.1	18-May-2008	yamt	sync with head.
1.5.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.5.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	28-Apr-2008	martin	branches: 1.7.8; Remove clause 3 and 4 from TNF licenses
1.6	02-Mar-2007	ad	branches: 1.6.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	17-Jul-2003	nathanw	Adapt to structure name changes.
1.3	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	18-Nov-2001	scw	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.4	01-Dec-2001	scw	Small cleanup of FP register context goo.
1.1.2.3	25-Nov-2001	scw	Add defines for FP registers and for some more uc_flags values. Ditch CONTEXTSIZE in favour of RND_CTXSIZE which ensure the stack is always longword aligned (and it brings m68k into line with most other ports).
1.1.2.2	19-Nov-2001	scw	Tweak the context save/restore code; the first cut was a bit too simplistic.
1.1.2.1	18-Nov-2001	scw	Initial cut of m68k-specific pthreads backend. Compiles, but testing will have to wait until I've had some sleep.
1.6.12.1	18-May-2008	yamt	sync with head.
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.6	25-Nov-2003	christos	This is not needed anymore.
1.5	22-Sep-2003	cl	SA_SIGINFO support for m68k (libpthread)
1.4	26-Jul-2003	mrg	need <string.h>
1.3	08-Mar-2003	lukem	add __RCSID()
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	16-Jan-2003	thorpej	branches: 1.1.2; file pthread_md.c was initially added on branch nathanw_sa.
1.1.2.1	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.8	25-Jan-2011	christos	make pthread__sp unsigned long.
1.7	16-May-2009	ad	branches: 1.7.2; Remove unused code that's confusing when using cscope/opengrok.
1.6	28-Apr-2008	martin	branches: 1.6.8; Remove clause 3 and 4 from TNF licenses
1.5	10-Feb-2008	ad	branches: 1.5.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.4	24-Dec-2005	perry	branches: 1.4.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	25-Nov-2003	christos	m68k does not sigcontext<->mcontext anymore.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	18-Nov-2001	scw	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.5	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.4	06-Aug-2002	nathanw	struct reg/ucontext conversion glue.
1.1.2.3	28-Jul-2002	gmcgarry	_REG_SP -> _REG_A7 to match definition in mcontext.h.
1.1.2.2	19-Nov-2001	scw	The right value for STACKSPACE is 12, for 3 integer values in this implementation. (Actually, we only need 10; 2 ints, 1 short, but best to keep the stack long-word aligned).
1.1.2.1	18-Nov-2001	scw	Initial cut of m68k-specific pthreads backend. Compiles, but testing will have to wait until I've had some sleep.
1.4.12.1	23-Mar-2008	matt	sync with HEAD
1.5.4.1	18-May-2008	yamt	sync with head.
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.8	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.7	23-Apr-2004	simonb	s/the the/the/ (only in sources that aren't regularly imported from elsewhere).
1.6	17-Sep-2003	cl	fix pt_trapuc handling errors: - movl to address register doesn't set flags (add explicit test) - clr only clears a word (use clrl)
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.3	13-Jun-2003	scw	Apply Nathan's switch-away fix and previous save-PT_UC from new stack fix. Compile-tested only.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	18-Nov-2001	scw	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.4	01-Dec-2001	scw	G/C a superfluous assignment, and fix a PT_SWITCHTOUC bogon which managed to creep in with the last change...
1.1.2.3	25-Nov-2001	scw	Cleanup of the thread switching MD glue. With these changes, m68k now passes all Nathan's pthreads tests.
1.1.2.2	20-Nov-2001	scw	Fix a botched reference to a local label.
1.1.2.1	18-Nov-2001	scw	Initial cut of m68k-specific pthreads backend. Compiles, but testing will have to wait until I've had some sleep.
1.4	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.3	07-Aug-2003	agc	branches: 1.3.48; Move UCB-licensed code from 4-clause to 3-clause licence. Patches provided by Joel Baker in PR 22280, verified by myself.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Nov-2001	wdk	branches: 1.1.2; file SYS.h was initially added on branch nathanw_sa.
1.1.2.5	01-Dec-2002	wdk	Remove nop
1.1.2.4	24-Nov-2002	wdk	Use __ABICALLS__
1.1.2.3	23-Nov-2002	wdk	PIC_CALL macros had a major side effect - last instruction has a jump with an unfilled bdslot. Add nop instruction to ensure no side effect and let the assembler try and remove it.
1.1.2.2	20-Nov-2002	wdk	Jump could not represent target in direct addressing mode. Error discovered by current toolchain.
1.1.2.1	28-Nov-2001	wdk	Initial pthread support for Mips processors.
1.3.48.1	16-Aug-2009	matt	Make ABI agonstic (first pass).
1.4	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.3	28-Apr-2008	martin	branches: 1.3.8; 1.3.14; Remove clause 3 and 4 from TNF licenses
1.2	18-Jan-2003	thorpej	branches: 1.2.34; Merge the nathanw_sa branch.
1.1	28-Nov-2001	wdk	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.3	01-Dec-2002	wdk	- Use LEAF functions when nexted calls are not used. - Reorder branch-delay slots and let teh assembler do the hard work.
1.1.2.2	29-Nov-2001	wdk	setcontext macro incorrectly used the RA (return address) as the target PC to start the new context (RA == PC in getcontext so one may be lead to believe it wouldn't matter). Since the pthread__locked_switch() function updates the PC value we must use the PC value in the context. While we are the use T9 register for target PC value to maintain calling conventions.
1.1.2.1	28-Nov-2001	wdk	Initial pthread support for Mips processors.
1.2.34.1	18-May-2008	yamt	sync with head.
1.3.14.3	29-Apr-2011	matt	Pull in fixes from -current.
1.3.14.2	24-Aug-2009	matt	Fix typo
1.3.14.1	16-Aug-2009	matt	Make ABI agonstic (first pass).
1.3.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.3.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	28-Apr-2008	martin	branches: 1.7.8; 1.7.14; Remove clause 3 and 4 from TNF licenses
1.6	02-Mar-2007	ad	branches: 1.6.14; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	17-Jul-2003	nathanw	Adapt to structure name changes.
1.3	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Nov-2001	wdk	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.1	28-Nov-2001	wdk	Initial pthread support for Mips processors.
1.6.14.1	18-May-2008	yamt	sync with head.
1.7.14.1	16-Aug-2009	matt	Make ABI agonstic (first pass).
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.9	25-Jan-2011	christos	make pthread__sp unsigned long.
1.8	16-May-2009	ad	branches: 1.8.2; Remove unused code that's confusing when using cscope/opengrok.
1.7	28-Apr-2008	martin	branches: 1.7.8; Remove clause 3 and 4 from TNF licenses
1.6	24-Dec-2005	perry	branches: 1.6.22; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.5	03-Jul-2004	simonb	Catch up with changes to __fpregset_t. In __longjmp14(), copy the FP CSR from the correct array and array slot. Completes fix for PR port-mips/25942.
1.4	26-Nov-2003	he	branches: 1.4.2; Hide the register number constants behind an _R_ prefix, and also rename FPBASE to _FPBASE, so that we avoid polluting the user's name space when e.g. <sys/ptrace.h> is included. Previously, the PC symbol in mips/regnum.h would conflict with the declaration of the external variable by the same name in termcap.h, as discovered by the ``okheaders'' regression test.
1.3	12-Jun-2003	nathanw	STACKSPACE of 16 is too small, given the use of CALLFRAME_SIZ; increase to match.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Nov-2001	wdk	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.5	20-Dec-2002	thorpej	Update for mcontext_t changes.
1.1.2.4	05-Dec-2002	thorpej	Fix the reg <--> mcontext conversion macros. The reg structure is equivalent to the frame structure, which has a slightly different layout from the mcontext.
1.1.2.3	01-Dec-2002	wdk	Implement libpthread_dbg conversion macros.
1.1.2.2	29-Nov-2001	wdk	Drop STACKSPACE to 16 bytes
1.1.2.1	28-Nov-2001	wdk	Initial pthread support for Mips processors.
1.4.2.1	04-Jul-2004	he	Pull up revision 1.5 (requested by simonb in ticket #591): Changes fixing PR#25942: o Catch up with changes to __fpregset_t. In __longjmp14(), copy the FP CSR from the correct array and array slot.
1.6.22.1	18-May-2008	yamt	sync with head.
1.7.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.7.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.8.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.7	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.4	12-Jun-2003	nathanw	Oops, that's switch_return_point, not locked_return_point. The perils of cut-and-paste.
1.3	12-Jun-2003	nathanw	Apply switch-away fix and previous save-PT_UC from new stack fix.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	28-Nov-2001	wdk	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.4	01-Dec-2002	wdk	Reorder branch-delay slot usage, and remove nop's cond5 test with type 5 upcalls now work!!
1.1.2.3	24-Nov-2002	wdk	Use __ABICALLS__
1.1.2.2	20-Nov-2002	wdk	Use CALLFRAME_RA and CALLFRAME_SIZ instead of static contants.
1.1.2.1	28-Nov-2001	wdk	Initial pthread support for Mips processors.
1.1	03-Sep-2014	matt	New files for OR1K support
1.6	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.5	10-Jul-2004	nathanw	When _SOFT_FLOAT is defined, don't save or restore user FP context. (note: still needs some mk rules tweaking for MKSOFTFLOAT=yes to pass -msoft-float to asm builds).
1.4	02-Jun-2004	nathanw	Remove a comment made obsolete by the previous commit.
1.3	12-Jun-2003	nathanw	branches: 1.3.4; Don't need to set the MSR field here; _INITCONTEXT_U_MD() takes care of that where necessary.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Nov-2001	briggs	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.7	08-Aug-2002	nathanw	Use register prefixes everywhere, now that asm.h no longer provides the intermediate-format macros.
1.1.2.6	21-Nov-2001	briggs	Preserve LR and use CTR to hold new PC when setting new context.
1.1.2.5	21-Nov-2001	briggs	Save FP state as well as integer state. Save reasonable constant in MSR (supervisor-only).
1.1.2.4	20-Nov-2001	briggs	Some cleanup.
1.1.2.3	19-Nov-2001	briggs	Use r prefixes for registers.
1.1.2.2	17-Nov-2001	briggs	Change SETC to use a fixed register (r4).
1.1.2.1	13-Nov-2001	briggs	Initial stab at pthread support for PPC.
1.3.4.1	18-May-2005	riz	Pull up revision 1.4 (requested by matt in ticket #1526): Remove a comment made obsolete by the previous commit.
1.8	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.7	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	17-Jul-2003	nathanw	Adapt to structure name changes.
1.4	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.3	20-Jan-2003	matt	Add _REG_foo to ppc mcontext and use them instead of constants.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Nov-2001	briggs	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.2	21-Nov-2001	briggs	Save FP state as well as integer state. Save reasonable constant in MSR (supervisor-only).
1.1.2.1	13-Nov-2001	briggs	Initial stab at pthread support for PPC.
1.9	11-Apr-2020	rin	Revert previous: http://mail-index.netbsd.org/source-changes/2020/02/20/msg114173.html Comment turned out to be wrong, and KASSERT fires for oea. XXX Need to revisit shortly...
1.8	20-Feb-2020	rin	libpthread sets initial value of MSR for lwp's. However, appropriate value differs b/w oea/booke/ibm4xx, and there's no way to obtain it from userland. Therefore, this initial value should be corrected by cpu_setmcontext(). - Comment this in libpthread - Add KASSERT in cpu_mcontext_validate()
1.7	25-Jan-2011	christos	branches: 1.7.44; 1.7.46; make pthread__sp unsigned long.
1.6	16-May-2009	ad	branches: 1.6.2; Remove unused code that's confusing when using cscope/opengrok.
1.5	24-Dec-2005	perry	Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.4	11-Feb-2004	nathanw	Add ucontext conversion macros for an "extra" register set.
1.3	20-Jan-2003	matt	Add _REG_foo to ppc mcontext and use them instead of constants.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Nov-2001	briggs	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.8	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.7	06-Dec-2002	nathanw	sigcontext/ucontext glue.
1.1.2.6	22-Oct-2002	nathanw	Define _INITCONTEXT_U_MD() to set the MSR to a reasonable value.
1.1.2.5	24-Apr-2002	nathanw	Add macros to convert between struct ucontext and struct reg/fpreg.
1.1.2.4	23-Mar-2002	nathanw	Change operand constraint of "mr %0,1" from "=g" to "=r", since mr really wants a register. This fixes -g powerpc builds.
1.1.2.3	20-Nov-2001	briggs	Some cleanup.
1.1.2.2	14-Nov-2001	briggs	Add pthread__uc_pc() to pthread_md.h instead of making assumptions about the contents of the m.d. mcontext.
1.1.2.1	13-Nov-2001	briggs	Initial stab at pthread support for PPC.
1.6.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.7.46.2	12-Apr-2020	martin	Pull up following revision(s) (requested by rin in ticket #826): lib/libpthread/arch/powerpc/pthread_md.h: revision 1.9 sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.48 Revert previous: http://mail-index.netbsd.org/source-changes/2020/02/20/msg114173.html Comment turned out to be wrong, and KASSERT fires for oea. XXX Need to revisit shortly...
1.7.46.1	27-Feb-2020	martin	Pull up following revision(s) (requested by rin in ticket #736): lib/libpthread/arch/powerpc/pthread_md.h: revision 1.8 sys/arch/powerpc/powerpc/sig_machdep.c: revision 1.47 libpthread sets initial value of MSR for lwp's. However, appropriate value differs b/w oea/booke/ibm4xx, and there's no way to obtain it from userland. Therefore, this initial value should be corrected by cpu_setmcontext(). - Comment this in libpthread - Add KASSERT in cpu_mcontext_validate()
1.7.44.2	13-Apr-2020	martin	Mostly merge changes from HEAD upto 20200411
1.7.44.1	08-Apr-2020	martin	Merge changes from current as of 20200406
1.11	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.10	08-Jul-2006	ross	remove unreferenced temporary label
1.9	07-Jul-2004	nathanw	Fix a comment to say "Edit" instead of "Exit".
1.8	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.7	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.6	24-Jun-2003	nathanw	Oops, reordering the PT_STATE/PT_SWITCHTOUC/PT_SWITCHTO assembly killed a live value too soon. Fix by using a different register for the PT_STATE immediate.
1.5	23-Jun-2003	nathanw	Update the switch_return point name in the static case.
1.4	12-Jun-2003	nathanw	Two fixes: * In switch-away cases, write PT_SWITCHTO last (after PT_SWITCHTOUC), so that pthread__resolve_locks() doesn't see an empty SWITCHTOUC value. This also permits pthread__resolve_locks() to use the presence of PT_SWITCHTO as a sign that the thread has done all of its necessary chain work. * Make the return-point of pthread__switch global and visible, so that its address can be compared to the PC of a thread, again as a sign that its chain-work is done. (other architectures in progress, after they get the previous asm fix...)
1.3	06-Jun-2003	nathanw	Fix typo in comment.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	13-Nov-2001	briggs	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.10	14-Jan-2003	nathanw	Rewrite pthread__switch() and adjust pthread__locked_switch() to avoid storing the new saved-context pointer while still using the old stack. This avoids a race condition with pthread__find_interrupted() where a thread could lose its old state if it was interrupted in a certain window in pthread__switch().
1.1.2.9	09-Nov-2002	nathanw	Make pthread__locked_switch() work in a PIC world, now that the linker is less lenient. XXX the stack usage is probably overkill for the required alignment.
1.1.2.8	08-Aug-2002	nathanw	Use register prefixes everywhere, now that asm.h no longer provides the intermediate-format macros.
1.1.2.7	02-May-2002	nathanw	Restore all three registers that are saved before the call to pthread__sa_recycle. Fixes a problem where pt_switchtouc would end up containing a small integer, rather than the ucontext pointer.
1.1.2.6	26-Nov-2001	briggs	Correct offset of ucontext on stack in pthread__switch(). Correct saved ucontext in PT_SLEEPUC in pthread__locked_switch().
1.1.2.5	21-Nov-2001	briggs	Update a couple of offsets I missed in earlier stack alignment.
1.1.2.4	20-Nov-2001	briggs	Some cleanup.
1.1.2.3	19-Nov-2001	briggs	Use r prefixes for registers.
1.1.2.2	16-Nov-2001	briggs	What crack was I on to use reg 0 in an addi instruction?
1.1.2.1	13-Nov-2001	briggs	Initial stab at pthread support for PPC.
1.3	07-May-2023	skrll	RISC-V support that works on QEMU with a single hart. Thanks for Simon Burge for plic(4).
1.2	31-Mar-2015	matt	We have _REG_SP so use it.
1.1	19-Sep-2014	matt	New files for Userland support of UCB RISC-V (both 32-bit and 64-bit)
1.7	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.6	01-Jun-2008	uwe	branches: 1.6.6; Recycle unused _REG_EXPEVT slot in mcontext for _REG_GBR. As the size of mcontext is not changed, we avoid the hassle of versioning all the calls that use it. _REG_EXPEVT was never used by any code in the tree. Reporting EXPEVT makes sense only for signals and in that case we pass it to userland in ksi_trap already which is official MI way to get this (MD) information. Old binaries running on new kernels will now have their GBR set from new mcontext, but that's ok too, as GBR was not properly supported by old kernels (not saved in trapframe), so old binaries couldn't have possibly used it anyway.
1.5	04-Jan-2006	uwe	branches: 1.5.20; 1.5.22; In PIC code call setcontext(2) via PLT to avoid text reloc in the shared library.
1.4	17-Nov-2003	uwe	branches: 1.4.6; Cause SIGTRAP if NOTREACHED code is reached.
1.3	05-Jul-2003	uwe	Not that the branch in SETC doens't have a delay slot, remove the .empty comment as it's no longer pertinent.
1.2	05-Jul-2003	marcus	PIC patch from Valeriy E. Ushakov applied. Also, removed bogus delay slot flag from branch instruction.
1.1	23-Jun-2003	uwe	First bits of SH3 support. Only _context_u.S is implemented (passess cu[1-6] tests), the pthread_switch.S is stubbed out for now. Code posted by Christian Groessler (cpg at aladdin dot de) to port-sh3.
1.4.6.1	11-Jan-2006	tron	Pull up following revision(s) (requested by uwe in ticket #1095): lib/libpthread/arch/sh3/_context_u.S: revision 1.5 In PIC code call setcontext(2) via PLT to avoid text reloc in the shared library.
1.5.22.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.5.20.1	04-Jun-2008	yamt	sync with head
1.6.6.2	01-Jun-2008	uwe	Recycle unused _REG_EXPEVT slot in mcontext for _REG_GBR. As the size of mcontext is not changed, we avoid the hassle of versioning all the calls that use it. _REG_EXPEVT was never used by any code in the tree. Reporting EXPEVT makes sense only for signals and in that case we pass it to userland in ksi_trap already which is official MI way to get this (MD) information. Old binaries running on new kernels will now have their GBR set from new mcontext, but that's ok too, as GBR was not properly supported by old kernels (not saved in trapframe), so old binaries couldn't have possibly used it anyway.
1.6.6.1	01-Jun-2008	uwe	file _context_u.S was added on branch christos-time_t on 2008-06-01 23:07:21 +0000
1.9	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.8	01-Jun-2008	uwe	branches: 1.8.6; Recycle unused _REG_EXPEVT slot in mcontext for _REG_GBR. As the size of mcontext is not changed, we avoid the hassle of versioning all the calls that use it. _REG_EXPEVT was never used by any code in the tree. Reporting EXPEVT makes sense only for signals and in that case we pass it to userland in ksi_trap already which is official MI way to get this (MD) information. Old binaries running on new kernels will now have their GBR set from new mcontext, but that's ok too, as GBR was not properly supported by old kernels (not saved in trapframe), so old binaries couldn't have possibly used it anyway.
1.7	28-Apr-2008	martin	branches: 1.7.2; Remove clause 3 and 4 from TNF licenses
1.6	02-Mar-2007	ad	branches: 1.6.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.5	18-Nov-2003	uwe	Add necessary symbols.
1.4	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.3	17-Jul-2003	nathanw	Adapt to structure name changes.
1.2	05-Jul-2003	marcus	The field "pt_sleepuc" doesn't exist in struct pthread_st.
1.1	23-Jun-2003	uwe	First bits of SH3 support. Only _context_u.S is implemented (passess cu[1-6] tests), the pthread_switch.S is stubbed out for now. Code posted by Christian Groessler (cpg at aladdin dot de) to port-sh3.
1.6.12.2	04-Jun-2008	yamt	sync with head
1.6.12.1	18-May-2008	yamt	sync with head.
1.7.2.1	23-Jun-2008	wrstuden	Sync w/ -current. 34 merge conflicts to follow.
1.8.6.2	01-Jun-2008	uwe	Recycle unused _REG_EXPEVT slot in mcontext for _REG_GBR. As the size of mcontext is not changed, we avoid the hassle of versioning all the calls that use it. _REG_EXPEVT was never used by any code in the tree. Reporting EXPEVT makes sense only for signals and in that case we pass it to userland in ksi_trap already which is official MI way to get this (MD) information. Old binaries running on new kernels will now have their GBR set from new mcontext, but that's ok too, as GBR was not properly supported by old kernels (not saved in trapframe), so old binaries couldn't have possibly used it anyway.
1.8.6.1	01-Jun-2008	uwe	file genassym.cf was added on branch christos-time_t on 2008-06-01 23:07:21 +0000
1.8	25-Jan-2011	christos	make pthread__sp unsigned long.
1.7	16-May-2009	ad	branches: 1.7.2; Remove unused code that's confusing when using cscope/opengrok.
1.6	27-Oct-2008	uwe	branches: 1.6.4; Fix typo in comment.
1.5	27-Oct-2008	uwe	Pull down revision 1.3.6.1 by skrll@ (adapted to include reg::r_gbr). struct mcontext != struct reg on sh3. Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT to deal with this.
1.4	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.3	24-Dec-2005	perry	branches: 1.3.4; 1.3.6; 1.3.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.2	20-Nov-2003	uwe	Add _INITCONTEXT_U_MD, we need to clean _REG_SR.
1.1	23-Jun-2003	uwe	First bits of SH3 support. Only _context_u.S is implemented (passess cu[1-6] tests), the pthread_switch.S is stubbed out for now. Code posted by Christian Groessler (cpg at aladdin dot de) to port-sh3.
1.3.12.1	23-Mar-2008	matt	sync with HEAD
1.3.6.1	26-Feb-2008	skrll	struct mcontext != struct reg on sh3. Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT to deal with this.
1.3.4.1	16-Sep-2008	bouyer	Sync with the following revisions (requested by skrll in ticket #1196): gnu/dist/gdb removed gnu/usr.bin/gdb53 removed distrib/cats/instkernel/Makefile 1.14.6.1 gnu/dist/gdb6/bfd/config.bfd 1.3.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.c 1.1.1.2.6.1 gnu/dist/gdb6/bfd/elfxx-sparc.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/Makefile.in 1.2.2.1.2.2 gnu/dist/gdb6/gdb/alpha-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alpha-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/alphabsd-nat.h 1.1.2.1 gnu/dist/gdb6/gdb/alphabsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphabsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/alphanbsd-nat.c 1.1.2.1 gnu/dist/gdb6/gdb/alphanbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/amd64nbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/amd64nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/arm-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/armbsd-tdep.c 1.1.2.1 gnu/dist/gdb6/gdb/armnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/armnbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure 1.1.1.2.6.1 gnu/dist/gdb6/gdb/configure.ac 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386bsd-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/i386nbsd-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/m68kbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/mipsnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/nbsd-thread.c 1.1.2.3 gnu/dist/gdb6/gdb/ppcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/ppcnbsd-tdep.c 1.3.6.1 gnu/dist/gdb6/gdb/sh-tdep.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/shnbsd-nat.c 1.1.1.2.6.3 gnu/dist/gdb6/gdb/shnbsd-tdep.c 1.1.1.2.6.4 gnu/dist/gdb6/gdb/shnbsd-tdep.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc-nat.c 1.1.1.2.6.1 gnu/dist/gdb6/gdb/sparc64nbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/sparcnbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/tramp-frame.h 1.1.1.2.6.1 gnu/dist/gdb6/gdb/vaxbsd-nat.c 1.1.1.2.6.2 gnu/dist/gdb6/gdb/config/alpha/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/arm/nbsd.mt 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/arm/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/i386/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/m68k/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/mips/nbsd.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/powerpc/nbsd.mh 1.1.1.2.6.1 gnu/dist/gdb6/gdb/config/sh/nbsd.mh 1.1.1.1.6.2 gnu/dist/gdb6/gdb/config/sh/tm-nbsd.h 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsd64.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/sparc/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/gdb/config/vax/nbsdelf.mh 1.1.1.1.6.1 gnu/dist/gdb6/opcodes/configure 1.1.1.2.6.1 gnu/dist/gdb6/opcodes/configure.in 1.1.1.2.6.1 gnu/usr.bin/Makefile 1.126.4.1 gnu/usr.bin/gdb6/arch/alpha/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/alpha/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/init.c 1.2.6.1 gnu/usr.bin/gdb6/arch/alpha/nm.h 1.2.6.1 gnu/usr.bin/gdb6/arch/arm/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/arm/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/defs.mk 1.1.6.3 gnu/usr.bin/gdb6/arch/armeb/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/armeb/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/i386/defs.mk 1.4.4.1 gnu/usr.bin/gdb6/arch/i386/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/m68000/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/m68k/defs.mk 1.1.4.1 gnu/usr.bin/gdb6/arch/m68k/init.c 1.1.4.1 gnu/usr.bin/gdb6/arch/mipseb/config.h 1.3.4.1 gnu/usr.bin/gdb6/arch/mipseb/defs.mk 1.2.6.2 gnu/usr.bin/gdb6/arch/mipseb/init.c 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/config.h 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/defs.mk 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/init.c 1.2.6.3 gnu/usr.bin/gdb6/arch/mipsel/tm.h 1.2.6.2 gnu/usr.bin/gdb6/arch/mipsel/version.c 1.2.6.2 gnu/usr.bin/gdb6/arch/powerpc/defs.mk 1.3.6.1 gnu/usr.bin/gdb6/arch/powerpc/init.c 1.3.6.1 gnu/usr.bin/gdb6/arch/sh3eb/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3eb/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3eb/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3eb/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3eb/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/config.h 1.2.2.2 gnu/usr.bin/gdb6/arch/sh3el/defs.mk 1.2.8.3 gnu/usr.bin/gdb6/arch/sh3el/init.c 1.1.8.3 gnu/usr.bin/gdb6/arch/sh3el/nm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/tm.h 1.1.8.2 gnu/usr.bin/gdb6/arch/sh3el/version.c 1.1.8.2 gnu/usr.bin/gdb6/arch/sparc/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/sparc64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/sparc64/init.c 1.1.6.1 gnu/usr.bin/gdb6/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/init.c 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/tm.h 1.1.6.2 gnu/usr.bin/gdb6/arch/vax/version.c 1.1.6.2 gnu/usr.bin/gdb6/arch/x86_64/defs.mk 1.2.6.1 gnu/usr.bin/gdb6/arch/x86_64/init.c 1.1.6.1 gnu/usr.bin/gdb6/bfd/arch/armeb/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3eb/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfd.h 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/sh3el/bfdver.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/bfd/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/bfd/arch/vax/bfd.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/bfdver.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/bfd/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/gdb/Makefile 1.5.2.1.2.2 gnu/usr.bin/gdb6/gdbtui/Makefile 1.2.6.1 gnu/usr.bin/gdb6/libiberty/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/libiberty/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/libiberty/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3eb/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/opcodes/arch/sh3el/defs.mk 1.1.8.3 gnu/usr.bin/gdb6/opcodes/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/opcodes/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/armeb/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/m68000/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/mipsel/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3eb/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/config.h 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/sh3el/defs.mk 1.1.8.2 gnu/usr.bin/gdb6/readline/arch/vax/config.h 1.1.6.2 gnu/usr.bin/gdb6/readline/arch/vax/defs.mk 1.1.6.2 gnu/usr.bin/gdb6/sim/arch/mipseb/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipseb/defs.mk 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/cconfig.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/config.h 1.1.2.1 gnu/usr.bin/gdb6/sim/arch/mipsel/defs.mk 1.1.2.1 lib/libkvm/kvm_sparc64.c 1.10.18.2 lib/libpthread/pthread.c 1.48.6.4 lib/libpthread/pthread_barrier.c 1.6.18.1 lib/libpthread/pthread_cond.c 1.18.12.2 lib/libpthread/pthread_debug.h 1.8.18.1 lib/libpthread/pthread_int.h 1.34.4.5 lib/libpthread/pthread_lock.c 1.14.6.1 lib/libpthread/pthread_mutex.c 1.22.4.2 lib/libpthread/pthread_run.c 1.18.12.4 lib/libpthread/pthread_rwlock.c 1.13.6.2 lib/libpthread/pthread_sa.c 1.37.6.5 lib/libpthread/pthread_sig.c 1.47.4.8 lib/libpthread/pthread_sleep.c 1.7.6.2 lib/libpthread/sem.c 1.9.6.2 lib/libpthread/arch/sh3/pthread_md.h 1.3.6.1 regress/lib/libpthread/resolv/Makefile 1.1.12.1 regress/lib/libpthread/sigrunning/Makefile 1.1.2.1 regress/lib/libpthread/sigrunning/sigrunning.c 1.1.2.1 share/mk/bsd.own.mk 1.489.4.3 sys/arch/amd64/amd64/locore.S 1.18.14.1 sys/arch/amd64/amd64/machdep.c 1.44.2.3.2.1 sys/arch/amd64/conf/kern.ldscript 1.1.70.1 sys/arch/cats/conf/Makefile.cats.inc 1.17.30.1 sys/arch/shark/conf/Makefile.shark.inc 1.6.30.1 sys/arch/sparc64/conf/kern.ldscript 1.7.26.2 sys/arch/sparc64/conf/kern32.ldscript 1.6.26.2 sys/arch/sparc64/include/kcore.h 1.4.92.2 sys/arch/sparc64/sparc64/locore.s 1.232.4.4 sys/arch/sparc64/sparc64/machdep.c 1.193.4.3 sys/arch/sparc64/sparc64/pmap.c 1.184.2.1.2.4 sys/conf/newvers.sh 1.42.26.2 sys/kern/kern_sa.c 1.87.4.11 sys/kern/kern_synch.c 1.173.4.2 sys/sys/savar.h 1.20.10.2 tools/gdb/Makefile 1.9.4.1 tools/gdb/mknative-gdb 1.1.6.1 pullup the wrstuden-fixsa CVS branch to netbsd-4: toolchain/35540 - GDB 6 support for pthreads. port-sparc64/37534 - ktrace firefox gives kernel trap 30: data access expection GDB changes: - delete gdb53 - enable gdb6 on all architectures - add support for amd64 crash dumps - add support for sparc64 crash dumps - add support for /proc pid to executable filename for all archs - enable thread support for all architectures - add a note section to kernels to all platforms - support detection/unwinding of signals for most architectures. - Fix PTHREAD_UCONTEXT_TO_REG / PTHREAD_REG_TO_UCONTEXT on sh3. - Apply fix from binutils-current so that sparc gdb can be cross built on a 64bit host. SA/pthread changes: Pre-allocate memory needed for event delivery. Eliminates dropped interrupts under load. Deliver intra-process signals to running threads Eliminate some deadlock scenarios Fix intra-process signal delivery when delivering to a thread waiting for signals. Makes afs work again!
1.6.4.2	27-Oct-2008	uwe	Fix typo in comment.
1.6.4.1	27-Oct-2008	uwe	file pthread_md.h was added on branch christos-time_t on 2008-10-27 00:52:08 +0000
1.7.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.8	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.7	06-Jan-2006	uwe	Use PLT for PIC calls to avoid text relocs in the shared library.
1.6	31-Dec-2005	uwe	Adapt to new PIC macros that are now in <machine/asm.h>. Same binary code is generated (still with text relocs, but eliminating them is the next step).
1.5	28-May-2004	uwe	branches: 1.5.2; Fix typo in comment.
1.4	20-Nov-2003	uwe	Do not move incoming paramters to callee-save registers when not necessary. Saves about a dozen of instructions.
1.3	20-Nov-2003	uwe	In pthread__locked_switch set self->pt_uc only when the context is inited. In STACK_SWITCH subtract STACKSPACE, not add it (it's zero for now anyway).
1.2	18-Nov-2003	uwe	First cut at pthreads MD code for sh3. Based on m68k version. Regression tests still failing: sem, sigalarm.
1.1	23-Jun-2003	uwe	First bits of SH3 support. Only _context_u.S is implemented (passess cu[1-6] tests), the pthread_switch.S is stubbed out for now. Code posted by Christian Groessler (cpg at aladdin dot de) to port-sh3.
1.5.2.2	11-Jan-2006	tron	Pull up following revision(s) (requested by uwe in ticket #1099): lib/libpthread/arch/sh3/pthread_switch.S: revision 1.7 Use PLT for PIC calls to avoid text relocs in the shared library.
1.5.2.1	11-Jan-2006	tron	Pull up following revision(s) (requested by uwe in ticket #1094): lib/libpthread/arch/sh3/pthread_switch.S: revision 1.6 Adapt to new PIC macros that are now in <machine/asm.h>. Same binary code is generated (still with text relocs, but eliminating them is the next step).
1.4	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.3	28-Apr-2008	martin	branches: 1.3.8; Remove clause 3 and 4 from TNF licenses
1.2	18-Jan-2003	thorpej	branches: 1.2.32; Merge the nathanw_sa branch.
1.1	23-Nov-2002	martin	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.4	07-Jan-2003	thorpej	UC_GREG -> UC_GREGS
1.1.2.3	29-Nov-2002	uwe	Add _UC_USER to genassym.cf and use it instead of hardcoded magic number.
1.1.2.2	28-Nov-2002	uwe	Save nPC in _getcontext_u() too, so that we can setcontext(2) it. Cosmetic changes. All context tests now work.
1.1.2.1	23-Nov-2002	martin	Port of Andrey Petrovs sparc64 support to sparc. With input from Valeriy E. Ushakov. Not yet tested.
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.3.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.9	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.8	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.7	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.6	29-Jul-2003	kleink	Remove PT_SLEEPUC, which somehow wasn't.
1.5	17-Jul-2003	nathanw	Adapt to structure name changes.
1.4	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.3	31-Jan-2003	pk	Include <sys/types.h> Remove v9 register defs.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	23-Nov-2002	martin	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.3	18-Dec-2002	skrll	Fix up after change to mcontext.h
1.1.2.2	29-Nov-2002	uwe	Add _UC_USER to genassym.cf and use it instead of hardcoded magic number.
1.1.2.1	23-Nov-2002	martin	Port of Andrey Petrovs sparc64 support to sparc. With input from Valeriy E. Ushakov. Not yet tested.
1.8	25-Jan-2011	christos	make pthread__sp unsigned long.
1.7	16-May-2009	ad	branches: 1.7.2; Remove unused code that's confusing when using cscope/opengrok.
1.6	28-Apr-2008	martin	branches: 1.6.8; Remove clause 3 and 4 from TNF licenses
1.5	10-Feb-2008	ad	branches: 1.5.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.4	24-Dec-2005	perry	branches: 1.4.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	10-Nov-2003	martin	All the ucontext <-> {fp}reg macros were slightly simplistic and untested before (old gdb support on sparc did not use this). Pointed out by Christian Limpach.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	23-Nov-2002	martin	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.2	18-Dec-2002	skrll	Fix up after change to mcontext.h
1.1.2.1	23-Nov-2002	martin	Port of Andrey Petrovs sparc64 support to sparc. With input from Valeriy E. Ushakov. Not yet tested.
1.4.12.1	23-Mar-2008	matt	sync with HEAD
1.5.4.1	18-May-2008	yamt	sync with head.
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.9	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.8	04-Jan-2006	skrll	A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.7	07-Sep-2003	cl	branches: 1.7.6; Remove possible race condition in upcall recycling.
1.6	07-Sep-2003	uwe	Use delay slot in STACK_SWITCH (catching up with sparc64 changes).
1.5	07-Sep-2003	uwe	Use correct context to switch to. From sparc64 fix by Andrey Petrov <petrov@netbsd>.
1.4	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.3	17-Jun-2003	martin	Catch up with Nathan's changes to other archs.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	23-Nov-2002	martin	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.3	07-Jan-2003	thorpej	UC_GREG -> UC_GREGS
1.1.2.2	28-Nov-2002	uwe	Remove few remaining sparc64'isms. Some cosmetic changes.
1.1.2.1	23-Nov-2002	martin	Port of Andrey Petrovs sparc64 support to sparc. With input from Valeriy E. Ushakov. Not yet tested.
1.7.6.1	08-Jan-2006	riz	Pull up following revision(s) (requested by skrll in ticket #1093): lib/libpthread/arch/sparc/pthread_switch.S: revision 1.8 lib/libpthread/arch/x86_64/pthread_switch.S: revision 1.11 lib/libpthread/arch/sparc64/pthread_switch.S: revision 1.9 lib/libpthread/arch/i386/pthread_switch.S: revision 1.9 A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.4	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.3	28-Apr-2008	martin	branches: 1.3.8; Remove clause 3 and 4 from TNF licenses
1.2	18-Jan-2003	thorpej	branches: 1.2.32; Merge the nathanw_sa branch.
1.1	22-Feb-2002	petrov	branches: 1.1.2; file _context_u.S was initially added on branch nathanw_sa.
1.1.2.5	23-Nov-2002	martin	Minor style nits, express frame size by apropriate macro and reorder one load sequence to avoid pipeline interlocks. From Valeriy E. Ushakov.
1.1.2.4	19-Sep-2002	petrov	PIC aware, remove debug cruft.
1.1.2.3	21-May-2002	petrov	STACK_SWITCH fix, added debug.
1.1.2.2	26-Apr-2002	petrov	round 2: simplify _get(set)context_u, add pthread__locked_switch.
1.1.2.1	22-Feb-2002	petrov	Initial pthreads support
1.2.32.1	18-May-2008	yamt	sync with head.
1.3.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.3.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.9	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.8	28-Apr-2008	martin	branches: 1.8.8; Remove clause 3 and 4 from TNF licenses
1.7	02-Mar-2007	ad	branches: 1.7.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	17-Jul-2003	nathanw	Adapt to structure name changes.
1.4	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.3	07-May-2003	petrov	Add missing include and copyright.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	22-Feb-2002	petrov	branches: 1.1.2; file genassym.cf was initially added on branch nathanw_sa.
1.1.2.1	22-Feb-2002	petrov	Initial pthreads support
1.7.12.1	18-May-2008	yamt	sync with head.
1.8.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.8.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7	25-Jan-2011	christos	make pthread__sp unsigned long.
1.6	16-May-2009	ad	branches: 1.6.2; Remove unused code that's confusing when using cscope/opengrok.
1.5	28-Apr-2008	martin	branches: 1.5.8; Remove clause 3 and 4 from TNF licenses
1.4	24-Dec-2005	perry	branches: 1.4.20; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	11-Nov-2003	martin	Fix ucontext conversion macros. From Christian Limpach.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	22-Feb-2002	petrov	branches: 1.1.2; file pthread_md.h was initially added on branch nathanw_sa.
1.1.2.4	16-Jan-2003	thorpej	* Move the pthread_sigmask() prototype to <signal.h>. * Don't include <signal.h> in <pthread.h>. * Add code to the signal trampoline to convert from the ucontext to a sigcontext, and back again (XXX though, only callee-save regs for _UC_USER contexts). This is necessary in order to support e.g. GCC's libjava, which depends on the traditional Unix semantics of changes made to the sigcontext being visible when the handler returns.
1.1.2.3	10-Sep-2002	petrov	regs/mcontext conversion macros.
1.1.2.2	26-Apr-2002	petrov	round 2: simplify _get(set)context_u, add pthread__locked_switch.
1.1.2.1	22-Feb-2002	petrov	Initial pthreads support
1.4.20.1	18-May-2008	yamt	sync with head.
1.5.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.5.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.6.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.10	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.9	04-Jan-2006	skrll	A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.8	07-Sep-2003	cl	branches: 1.8.6; Remove possible race condition in upcall recycling.
1.7	26-Aug-2003	petrov	typo in previous commit, annul isn't good there, noticed by Eduardo Horvath.
1.6	25-Aug-2003	petrov	Use branch-slot in STACK_SWITCH, suggested by Martin Husemann.
1.5	25-Aug-2003	petrov	Use correct context to switch to.
1.4	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.3	15-Jun-2003	martin	Catch up with changes Nathan did to other archs.
1.2	18-Jan-2003	thorpej	Merge the nathanw_sa branch.
1.1	22-Feb-2002	petrov	branches: 1.1.2; file pthread_switch.S was initially added on branch nathanw_sa.
1.1.2.6	20-Sep-2002	petrov	minor clean-up.
1.1.2.5	19-Sep-2002	petrov	PIC aware, remove debug cruft.
1.1.2.4	22-May-2002	petrov	more fixes.
1.1.2.3	21-May-2002	petrov	STACK_SWITCH fix, added debug.
1.1.2.2	26-Apr-2002	petrov	round 2: simplify _get(set)context_u, add pthread__locked_switch.
1.1.2.1	22-Feb-2002	petrov	Implementation of pthread__switch only so far.
1.8.6.1	08-Jan-2006	riz	Pull up following revision(s) (requested by skrll in ticket #1093): lib/libpthread/arch/sparc/pthread_switch.S: revision 1.8 lib/libpthread/arch/x86_64/pthread_switch.S: revision 1.11 lib/libpthread/arch/sparc64/pthread_switch.S: revision 1.9 lib/libpthread/arch/i386/pthread_switch.S: revision 1.9 A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.5	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.4	28-Apr-2008	martin	branches: 1.4.8; Remove clause 3 and 4 from TNF licenses
1.3	09-Apr-2005	matt	branches: 1.3.20; Rework and cleanup. Don't use REI, fake a call frame instead.
1.2	19-Jan-2003	matt	Set _UC_USER in ucontext. Call setcontext if _UC_USER is not in _setcontext_u
1.1	19-Jan-2003	matt	VAX versions of _getcontext_u/_setcontext_u/_swapcontext_u
1.3.20.1	18-May-2008	yamt	sync with head.
1.4.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.4.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.9	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.8	28-Apr-2008	martin	branches: 1.8.8; Remove clause 3 and 4 from TNF licenses
1.7	02-Mar-2007	ad	branches: 1.7.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	09-Apr-2005	matt	Add STACKSPACE
1.5	01-Dec-2004	skrll	pt_sleepuc was removed a long time ago.
1.4	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.3	25-Aug-2003	ragge	Add PT_TRAPUC and pthread__switch_return_point. Not tested (as most of the pthread stuff on vax) but at least allow the system to compile.
1.2	17-Jul-2003	nathanw	Adapt to structure name changes.
1.1	19-Jan-2003	matt	Add of pthread support for VAX.
1.7.12.1	18-May-2008	yamt	sync with head.
1.8.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.8.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.8	25-Jan-2011	christos	make pthread__sp unsigned long.
1.7	16-May-2009	ad	branches: 1.7.2; Remove unused code that's confusing when using cscope/opengrok.
1.6	28-Apr-2008	martin	branches: 1.6.8; Remove clause 3 and 4 from TNF licenses
1.5	10-Feb-2008	ad	branches: 1.5.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.4	24-Dec-2005	perry	branches: 1.4.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	20-Jan-2003	matt	Define FPREG macros even though we don't have any.
1.2	19-Jan-2003	matt	Need to define STACKSIZE (even though we don't need any).
1.1	19-Jan-2003	matt	Add of pthread support for VAX.
1.4.12.1	23-Mar-2008	matt	sync with HEAD
1.5.4.1	18-May-2008	yamt	sync with head.
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.7	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.6	09-Apr-2005	matt	Merge updates to algorithms from i386 switch code.
1.5	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.4	25-Aug-2003	ragge	Add PT_TRAPUC and pthread__switch_return_point. Not tested (as most of the pthread stuff on vax) but at least allow the system to compile.
1.3	09-Jul-2003	matt	Update to new world order. not tested But will allow builds to finish.
1.2	20-Jan-2003	matt	Add myself to the authors list.
1.1	19-Jan-2003	matt	Add of pthread support for VAX.
1.12	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.11	28-Apr-2008	martin	branches: 1.11.8; Remove clause 3 and 4 from TNF licenses
1.10	10-Feb-2008	ad	branches: 1.10.4; - Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.9	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.8	13-Nov-2007	ad	For PR bin/37347: - Override __libc_thr_init() instead of using our own constructor. - Add pthread__getenv() and use instead of getenv(). This is used before we are up and running and unfortunatley getenv() takes locks. Other changes: - Cache the spinlock vectors in pthread__st. Internal spinlock operations now take 1 function call instead of 3 (i386). - Use pthread__self() internally, not pthread_self(). - Use __attribute__ ((visibility("hidden"))) in some places. - Kill PTHREAD_MAIN_DEBUG.
1.7	11-Sep-2007	ad	Fix a dodgy bit of assembly.
1.6	07-Sep-2007	ad	- Don't take the mutex's spinlock (ptr_interlock) in pthread_cond_wait(). Instead, make the deferred wakeup list a per-thread array and pass down the lwpid_t's that way. - In pthread_cond_wait(), take the mutex before dealing with early wakeup. In this way there should never be contention on the CV's spinlock if the app follows POSIX rules (there should only be contention on the user-provided mutex). - Add a port of the kernel's rwlocks. The rwlock's spinlock is only taken if there is contention. This is enabled where atomic ops are available. Right now that is only i386 and amd64 because I don't have other hardware to test with. It's trivial to add stubs for other architectures as long as they have compare-and-swap. When we have proper atomic ops the old rwlock code can be removed. - Add a new mutex implementation that's similar to the kernel's mutexes, but uses compare-and-swap to maintain the waiters list, so no spinlocks are involved. Same caveats apply as for the rwlocks.
1.5	07-Sep-2007	ad	Add: pthread__atomic_cas_ptr, pthread__atomic_swap_ptr, pthread__membar_full This is a stopgap until the thorpej-atomic branch is complete.
1.4	21-Oct-2004	fvdl	branches: 1.4.14; 1.4.18; Fix thread context switching to take the stack ABI into account. From Wolfgang Solfrank.
1.3	08-Nov-2003	fvdl	branches: 1.3.2; Restore %rax correctly during a full context restore (oops).
1.2	26-Jul-2003	salo	netbsd.org->NetBSD.org
1.1	30-Jan-2003	fvdl	libpthread support for x86_64.
1.3.2.1	12-Nov-2004	jmc	Pullup rev 1.4 (requested by fvdl in ticket #956) Fix thread context switching to take the stack ABI into account.
1.4.18.3	23-Mar-2008	matt	sync with HEAD
1.4.18.2	09-Jan-2008	matt	sync with HEAD
1.4.18.1	06-Nov-2007	matt	sync with HEAD
1.4.14.1	10-Sep-2007	skrll	Sync with HEAD.
1.10.4.1	18-May-2008	yamt	sync with head.
1.11.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.11.8.1	28-Apr-2008	martin	file _context_u.S was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.7	16-May-2009	ad	Remove unused code that's confusing when using cscope/opengrok.
1.6	28-Apr-2008	martin	branches: 1.6.8; Remove clause 3 and 4 from TNF licenses
1.5	02-Mar-2007	ad	branches: 1.5.12; Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.4	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.3	17-Jul-2003	nathanw	Adapt to structure name changes.
1.2	26-Jun-2003	nathanw	Remove PT_SLEEPUC and add PT_TRAPUC.
1.1	30-Jan-2003	fvdl	libpthread support for x86_64.
1.5.12.1	18-May-2008	yamt	sync with head.
1.6.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.6.8.1	28-Apr-2008	martin	file genassym.cf was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.13	25-May-2023	riastradh	libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437 XXX pullup-10
1.12	25-Jan-2011	christos	branches: 1.12.36; 1.12.46; 1.12.54; make pthread__sp unsigned long.
1.11	16-May-2009	ad	branches: 1.11.2; Remove unused code that's confusing when using cscope/opengrok.
1.10	28-Apr-2008	martin	branches: 1.10.8; Remove clause 3 and 4 from TNF licenses
1.9	22-Mar-2008	ad	branches: 1.9.2; Cheat and add inlines for _atomic_cas_ptr() to work around gcc emitting unneeded PIC stuff in mutex_lock() and mutex_unlock(), when a thread register is used.
1.8	10-Feb-2008	ad	- Remove libpthread's atomic ops. - Remove the old spinlock-based mutex and rwlock implementations. - Use the atomic ops from libc.
1.7	13-Nov-2007	ad	Mutexes: - Play scrooge again and chop more cycles off acquire/release. - Spin while the lock holder is running on another CPU (adaptive mutexes). - Do non-atomic release. Threadreg: - Add the necessary hooks to use a thread register. - Add the code for i386, using %gs. - Leave i386 code disabled until xen and COMPAT_NETBSD32 have the changes.
1.6	24-Sep-2007	skrll	Resurrect the function pointers for lock operations and allow each architecture to provide asm versions of the RAS operations. We do this because relying on the compiler to get the RAS right is not sensible. (It gets alpha wrong and hppa is suboptimal) Provide asm RAS ops for hppa. (A slightly different version) reviewed by Andrew Doran.
1.5	07-Sep-2007	ad	Add: pthread__atomic_cas_ptr, pthread__atomic_swap_ptr, pthread__membar_full This is a stopgap until the thorpej-atomic branch is complete.
1.4	24-Dec-2005	perry	branches: 1.4.8; 1.4.12; Remove leading __ from __(const\|inline\|signed\|volatile) -- it is obsolete.
1.3	26-Jul-2003	salo	netbsd.org->NetBSD.org
1.2	17-Apr-2003	fvdl	Catch up with changed struct reg (same as gregs in mcontext now).
1.1	30-Jan-2003	fvdl	libpthread support for x86_64.
1.4.12.3	23-Mar-2008	matt	sync with HEAD
1.4.12.2	09-Jan-2008	matt	sync with HEAD
1.4.12.1	06-Nov-2007	matt	sync with HEAD
1.4.8.1	10-Sep-2007	skrll	Sync with HEAD.
1.9.2.1	18-May-2008	yamt	sync with head.
1.10.8.2	28-Apr-2008	martin	Remove clause 3 and 4 from TNF licenses
1.10.8.1	28-Apr-2008	martin	file pthread_md.h was added on branch christos-time_t on 2008-04-28 20:23:03 +0000
1.11.2.1	08-Feb-2011	bouyer	Sync with HEAD
1.12.54.1	01-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #296): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.12.46.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1700): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.12.36.1	04-Aug-2023	martin	Pull up following revision(s) (requested by riastradh in ticket #1878): lib/libpthread/arch/x86_64/pthread_md.h: revision 1.13 lib/libpthread/pthread_int.h: revision 1.110 lib/libpthread/pthread_int.h: revision 1.111 lib/libpthread/arch/i386/pthread_md.h: revision 1.21 lib/libpthread/arch/arm/pthread_md.h: revision 1.12 lib/libpthread/arch/arm/pthread_md.h: revision 1.13 lib/libpthread/pthread_spin.c: revision 1.11 lib/libpthread/arch/aarch64/pthread_md.h: revision 1.2 libpthread: Use __nothing, not /* nothing */, for empty macros. No functional change intended -- just safer to do it this way in case the macros are used in if branches or comma expressions. PR port-arm/57437 (pthread__smt_pause/wake issue) libpthread: New pthread__smt_wait to put CPU in low power for spin. This is now distinct from pthread__smt_pause, which is for spin lock backoff with no paired wakeup. On Arm, there is a single-bit event register per CPU, and there are two instructions to manage it: - wfe, wait for event -- if event register is clear, enter low power mode and wait until event register is set; then exit low power mode and clear event register - sev, signal event -- sets event register on all CPUs (other circumstances like interrupts also set the event register and cause wfe to wake) These can be used to reduce the power consumption of spinning for a lock, but only if they are actually paired -- if there's no sev, wfe might hang indefinitely. Currently only pthread_spin(3) actually pairs them; the other lock primitives (internal lock, mutex, rwlock) do not -- they have spin lock backoff loops, but no corresponding wakeup to cancel a wfe. It may be worthwhile to teach the other lock primitives to pair wfe/sev, but that requires some performance measurement to verify it's actually worthwhile. So for now, we just make sure not to use wfe when there's no sev, and keep everything else the same -- this should fix severe performance degredation in libpthread on Arm without hurting anything else. No change in the generated code on amd64 and i386. No change in the generated code for pthread_spin.c on arm and aarch64 -- changes only the generated code for pthread_lock.c, pthread_mutex.c, and pthread_rwlock.c, as intended. PR port-arm/57437
1.13	02-Mar-2007	ad	Remove the PTHREAD_SA option. If M:N threads is reimplemented it's better off done with a seperate library.
1.12	09-Jan-2006	skrll	I was a bit over zealous with my last change so revert the locked_return_point change. Loading the instruction at locked_return_point as a return value didn't work so well. Thanks to uwe, cube, and dsl.
1.11	04-Jan-2006	skrll	A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.
1.10	23-Apr-2004	simonb	branches: 1.10.2; s/the the/the/ (only in sources that aren't regularly imported from elsewhere).
1.9	08-Nov-2003	fvdl	Make register usage more consistent, also in comparison with the i386 version, for easier maintenance.
1.8	20-Oct-2003	fvdl	Correct and simplify computing the return point; just use PC-relative addressing.
1.7	19-Oct-2003	fvdl	Make sure the stack stays aligned.
1.6	07-Sep-2003	cl	Remove possible race condition in upcall recycling.
1.5	26-Jul-2003	salo	netbsd.org->NetBSD.org
1.4	26-Jun-2003	nathanw	Adapt to pt_trapuc: change STACK_SWITCH to check for a value in pt_trapuc and use it preferentially to a value in pt_uc, clearing it once on the new stack. Move stores into pt_uc back to before the stack switch; storing after the stack switch opened a one-instruction race condition where an upcall that had just started a chain could be preempted again, and would bomb when restarted due to its pt_uc not yet having been updated. Now that pt_trapuc is what the upcall code writes to, it is safe to store to pt_uc before switching stacks. Remove obsolete pt_sleepuc code.
1.3	12-Jun-2003	fvdl	Apply Nathan's switch-away fix.
1.2	10-Feb-2003	fvdl	Continue at the plain switch return point in pthread__switch, not the locked one, in the !PIC case. From Tor Egge via Havard Eidnes.
1.1	30-Jan-2003	fvdl	libpthread support for x86_64.
1.10.2.2	11-Jan-2006	tron	Pull up following revision(s) (requested by skrll in ticket #1115): lib/libpthread/arch/x86_64/pthread_switch.S: revision 1.12 I was a bit over zealous with my last change so revert the locked_return_point change. Loading the instruction at locked_return_point as a return value didn't work so well. Thanks to uwe, cube, and dsl.
1.10.2.1	08-Jan-2006	riz	Pull up following revision(s) (requested by skrll in ticket #1093): lib/libpthread/arch/sparc/pthread_switch.S: revision 1.8 lib/libpthread/arch/x86_64/pthread_switch.S: revision 1.11 lib/libpthread/arch/sparc64/pthread_switch.S: revision 1.9 lib/libpthread/arch/i386/pthread_switch.S: revision 1.9 A couple of fixes to make libpthread really shared, i.e. not have text re- locations: - Don't declare pthread__switch_away global - Do the PIC dance for pthread__switch_return_point and pthread__locked_switch. Ideally these (and other) symbols would be hidden. Thanks to uwe@, dyoung@ and elad@ for help. XXX sh3 is still to be done. XXX vax does strange things.

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