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Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-9-4-RELEASE netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base netbsd-9-3-RELEASE cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 netbsd-9-2-RELEASE cjep_staticlib_x-base netbsd-9-1-RELEASE phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406 netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609
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1.6 |
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28-May-2019 |
kamil |
branches: 1.6.2;
Correct the example in kcov(4)
mmap(2) has to be called with MAP_SHARED, not MAP_PRIVATE.
Reported by Maciej Grochowski.
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1.5 |
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26-May-2019 |
kamil |
Drop no longer needed macros KCOV_STORE() KCOV_LOAD() in kcov(4)
Corrently KCOV_STORE() and KCOV_LOAD() are equivalent to x=y.
Obtained from <R3x>
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1.4 |
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10-Mar-2019 |
kamil |
Add support for trace type selection in kcov(4)
Allow to specify mode in KCOV_IOC_ENABLE synchronizing the functionality
with Linux, FreeBSD and OpenBSD. As a NetBSD (and OpenBSD) specific of
the ioctl(2) interface, the mode argument has to be specified as &value
rather than value.
There are 3 modes available:
1. KCOV_MODE_NONE -- no trace specified, useful for testing purposes
2. KCOV_MODE_TRACE_PC -- trace the kernel program counter
3. KCOV_MODE_TRACE_CMP -- trace comparison instructions and switch statements
Adapt the ATF tests and documentation for new API.
The KCOV_MODE_TRACE_CMP mode is implemented but still awaits for the
GCC 8.x upgrade or selection of Clang/LLVM as the kernel compiler.
Obtained from OpenBSD and adapted for NetBSD by myself.
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1.3 |
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10-Mar-2019 |
kamil |
Add support for multiple threads in kcov(4)
Reuse the fd_clone() API to associate kcov descriptors (KD) with a file
descriptor. Each fd (/dev/kcov) can be reused for a single LWP.
Add new ATF regression tests and cleanup existing code there. All tests
pass.
Refresh the kcov(4) man page documentation.
Developed with help from <maxv>.
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1.2 |
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23-Feb-2019 |
wiz |
New sentence, new line.
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1.1 |
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23-Feb-2019 |
kamil |
Add KCOV - kernel code coverage tracing device
The KCOV driver implements collection of code coverage inside the kernel.
It can be enabled on a per process basis from userland, allowing the kernel
program counter to be collected during syscalls triggered by the same
process.
The device is oriented towards kernel fuzzers, in particular syzkaller.
Currently the only supported coverage type is -fsanitize-coverage=trace-pc.
The KCOV driver was initially developed in Linux. A driver based on the
same concept was then implemented in FreeBSD and OpenBSD.
Documentation is borrowed from OpenBSD and ATF tests from FreeBSD.
This patch has been prepared by Siddharth Muralee, improved by <maxv>
and polished by myself before importing into the mainline tree.
All ATF tests pass.
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