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db_xxx.c revision 1.54 
      1 /*	$NetBSD: db_xxx.c,v 1.54 2008/11/25 15:14:07 ad Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1982, 1986, 1989, 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	from: kern_proc.c	8.4 (Berkeley) 1/4/94
     32  */
     33 
     34 /*
     35  * Miscellaneous DDB functions that are intimate (xxx) with various
     36  * data structures and functions used by the kernel (proc, callout).
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.54 2008/11/25 15:14:07 ad Exp $");
     41 
     42 #include "opt_kgdb.h"
     43 #include "opt_aio.h"
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/kernel.h>
     48 #include <sys/proc.h>
     49 #include <sys/msgbuf.h>
     50 
     51 #include <sys/callout.h>
     52 #include <sys/file.h>
     53 #include <sys/filedesc.h>
     54 #include <sys/lockdebug.h>
     55 #include <sys/signalvar.h>
     56 #include <sys/resourcevar.h>
     57 #include <sys/pool.h>
     58 #include <sys/kauth.h>
     59 #include <sys/mqueue.h>
     60 #include <sys/vnode.h>
     61 #include <sys/module.h>
     62 
     63 #include <machine/db_machdep.h>
     64 
     65 #include <ddb/db_access.h>
     66 #include <ddb/db_command.h>
     67 #include <ddb/db_interface.h>
     68 #include <ddb/db_lex.h>
     69 #include <ddb/db_output.h>
     70 #include <ddb/db_sym.h>
     71 #include <ddb/db_extern.h>
     72 #ifdef KGDB
     73 #include <sys/kgdb.h>
     74 #endif
     75 
     76 void
     77 db_kill_proc(db_expr_t addr, bool haddr,
     78     db_expr_t count, const char *modif)
     79 {
     80 	struct proc *p;
     81 	db_expr_t pid, sig;
     82 	int t;
     83 
     84 	/* What pid? */
     85 	if (!db_expression(&pid)) {
     86 		db_error("pid?\n");
     87 		/*NOTREACHED*/
     88 	}
     89 	/* What sig? */
     90 	t = db_read_token();
     91 	if (t == tCOMMA) {
     92 		if (!db_expression(&sig)) {
     93 			db_error("sig?\n");
     94 			/*NOTREACHED*/
     95 		}
     96 	} else {
     97 		db_unread_token(t);
     98 		sig = 15;
     99 	}
    100 	if (db_read_token() != tEOL) {
    101 		db_error("?\n");
    102 		/*NOTREACHED*/
    103 	}
    104 
    105 	p = pfind((pid_t)pid);
    106 	if (p == NULL) {
    107 		db_error("no such proc\n");
    108 		/*NOTREACHED*/
    109 	}
    110 	psignal(p, (int)sig);
    111 }
    112 
    113 #ifdef KGDB
    114 void
    115 db_kgdb_cmd(db_expr_t addr, bool haddr,
    116     db_expr_t count, const char *modif)
    117 {
    118 	kgdb_active++;
    119 	kgdb_trap(db_trap_type, DDB_REGS);
    120 	kgdb_active--;
    121 }
    122 #endif
    123 
    124 void
    125 db_show_files_cmd(db_expr_t addr, bool haddr,
    126 	      db_expr_t count, const char *modif)
    127 {
    128 	struct proc *p;
    129 	int i;
    130 	filedesc_t *fdp;
    131 	fdfile_t *ff;
    132 	file_t *fp;
    133 	struct vnode *vn;
    134 	bool full = false;
    135 
    136 	if (modif[0] == 'f')
    137 		full = true;
    138 
    139 	p = (struct proc *) (uintptr_t) addr;
    140 
    141 	fdp = p->p_fd;
    142 	for (i = 0; i < fdp->fd_nfiles; i++) {
    143 		if ((ff = fdp->fd_ofiles[i]) == NULL)
    144 			continue;
    145 
    146 		fp = ff->ff_file;
    147 
    148 		/* Only look at vnodes... */
    149 		if ((fp != NULL) && (fp->f_type == DTYPE_VNODE)) {
    150 			if (fp->f_data != NULL) {
    151 				vn = (struct vnode *) fp->f_data;
    152 				vfs_vnode_print(vn, full, db_printf);
    153 
    154 #ifdef LOCKDEBUG
    155 				db_printf("\nv_uobj.vmobjlock lock details:\n");
    156 				lockdebug_lock_print(&(vn->v_uobj.vmobjlock),
    157 					     db_printf);
    158 				db_printf("\n");
    159 #endif
    160 			}
    161 		}
    162 	}
    163 }
    164 
    165 #ifdef AIO
    166 void
    167 db_show_aio_jobs(db_expr_t addr, bool haddr,
    168     db_expr_t count, const char *modif)
    169 {
    170 	aio_print_jobs(db_printf);
    171 }
    172 #endif
    173 
    174 void
    175 db_show_mqueue_cmd(db_expr_t addr, bool haddr,
    176     db_expr_t count, const char *modif)
    177 {
    178 	mqueue_print_list(db_printf);
    179 }
    180 
    181 void
    182 db_show_module_cmd(db_expr_t addr, bool haddr,
    183     db_expr_t count, const char *modif)
    184 {
    185 	module_print_list(db_printf);
    186 }
    187 
    188 void
    189 db_show_all_procs(db_expr_t addr, bool haddr,
    190     db_expr_t count, const char *modif)
    191 {
    192 	const char *mode;
    193 	struct proc *p, *pp, *cp;
    194 	struct lwp *l, *cl;
    195 	const struct proclist_desc *pd;
    196 	char db_nbuf[MAXCOMLEN + 1];
    197 
    198 	if (modif[0] == 0)
    199 		mode = "n";			/* default == normal mode */
    200 	else
    201 		mode = strchr("mawln", modif[0]);
    202 
    203 	if (mode == NULL || *mode == 'm') {
    204 		db_printf("usage: show all procs [/a] [/l] [/n] [/w]\n");
    205 		db_printf("\t/a == show process address info\n");
    206 		db_printf("\t/l == show LWP info\n");
    207 		db_printf("\t/n == show normal process info [default]\n");
    208 		db_printf("\t/w == show process wait/emul info\n");
    209 		return;
    210 	}
    211 
    212 	switch (*mode) {
    213 	case 'a':
    214 		db_printf(" PID       %10s %18s %18s %18s\n",
    215 		    "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
    216 		break;
    217 	case 'l':
    218 		db_printf(" PID        %4s S %9s %18s %18s %-8s\n",
    219 		    "LID", "FLAGS", "STRUCT LWP *", "NAME", "WAIT");
    220 		break;
    221 	case 'n':
    222 		db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
    223 		    "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
    224 		break;
    225 	case 'w':
    226 		db_printf(" PID       %4s %16s %8s %4s %-12s%s\n",
    227 		    "LID", "COMMAND", "EMUL", "PRI", "WAIT-MSG",
    228 		    "WAIT-CHANNEL");
    229 		break;
    230 	}
    231 
    232 	/* XXX LOCKING XXX */
    233 	pd = proclists;
    234 	cp = curproc;
    235 	cl = curlwp;
    236 	for (pd = proclists; pd->pd_list != NULL; pd++) {
    237 		LIST_FOREACH(p, pd->pd_list, p_list) {
    238 			pp = p->p_pptr;
    239 			if (p->p_stat == 0) {
    240 				continue;
    241 			}
    242 			l = LIST_FIRST(&p->p_lwps);
    243 			db_printf("%c%-10d", (cp == p ? '>' : ' '), p->p_pid);
    244 
    245 			switch (*mode) {
    246 
    247 			case 'a':
    248 				db_printf("%10.10s %18lx %18lx %18lx\n",
    249 				    p->p_comm, (long)p,
    250 				    (long)(l != NULL ? l->l_addr : 0),
    251 				    (long)p->p_vmspace);
    252 				break;
    253 			case 'l':
    254 				 while (l != NULL) {
    255 				 	if (l->l_name != NULL) {
    256 				 		snprintf(db_nbuf,
    257 							 sizeof(db_nbuf),
    258 				 		    "%s", l->l_name);
    259 					} else
    260 				 		snprintf(db_nbuf,
    261 						    sizeof(db_nbuf),
    262 				 		    "%s", p->p_comm);
    263 					db_printf("%c%4d %d %9x %18lx %18s %-8s\n",
    264 					    (cl == l ? '>' : ' '), l->l_lid,
    265 					    l->l_stat, l->l_flag, (long)l,
    266 						  db_nbuf,
    267 					    (l->l_wchan && l->l_wmesg) ?
    268 					    l->l_wmesg : "");
    269 
    270 					l = LIST_NEXT(l, l_sibling);
    271 					if (l)
    272 						db_printf("%11s","");
    273 				}
    274 				break;
    275 			case 'n':
    276 				db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
    277 				    pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
    278 				    kauth_cred_getuid(p->p_cred), p->p_stat, p->p_flag,
    279 				    p->p_nlwps, p->p_comm,
    280 				    (p->p_nlwps != 1) ? "*" : (
    281 				    (l->l_wchan && l->l_wmesg) ?
    282 				    l->l_wmesg : ""));
    283 				break;
    284 
    285 			case 'w':
    286 				 while (l != NULL) {
    287 					db_printf(
    288 					    "%4d %16s %8s %4d %-12s %-18lx\n",
    289 					    l->l_lid, p->p_comm,
    290 					    p->p_emul->e_name, l->l_priority,
    291 					    (l->l_wchan && l->l_wmesg) ?
    292 					    l->l_wmesg : "", (long)l->l_wchan);
    293 					l = LIST_NEXT(l, l_sibling);
    294 					if (l != NULL) {
    295 						db_printf("%c%-10d", (cp == p ?
    296 						    '>' : ' '), p->p_pid);
    297 					}
    298 				}
    299 				break;
    300 			}
    301 		}
    302 	}
    303 }
    304 
    305 void
    306 db_show_all_pools(db_expr_t addr, bool haddr,
    307     db_expr_t count, const char *modif)
    308 {
    309 
    310 	pool_printall(modif, db_printf);
    311 }
    312 
    313 void
    314 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count,
    315     const char *modif)
    316 {
    317 	struct kern_msgbuf *mbp;
    318 	db_expr_t print;
    319 	int ch, newl, skip, i;
    320 	char *p, *bufdata;
    321 
    322         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
    323 		db_printf("message buffer not available\n");
    324 		return;
    325 	}
    326 
    327 	mbp = msgbufp;
    328 	bufdata = &mbp->msg_bufc[0];
    329 
    330 	if (haddr && addr < mbp->msg_bufs)
    331 		print = addr;
    332 	else
    333 		print = mbp->msg_bufs;
    334 
    335 	for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
    336 	    i < mbp->msg_bufs; i++, p++) {
    337 		if (p == bufdata + mbp->msg_bufs)
    338 			p = bufdata;
    339 		if (i < mbp->msg_bufs - print)
    340 			continue;
    341 		ch = *p;
    342 		/* Skip "\n<.*>" syslog sequences. */
    343 		if (skip) {
    344 			if (ch == '>')
    345 				newl = skip = 0;
    346 			continue;
    347 		}
    348 		if (newl && ch == '<') {
    349 			skip = 1;
    350 			continue;
    351 		}
    352 		if (ch == '\0')
    353 			continue;
    354 		newl = ch == '\n';
    355 		db_printf("%c", ch);
    356 	}
    357 	if (!newl)
    358 		db_printf("\n");
    359 }
    360 
    361 void
    362 db_show_sched_qs(db_expr_t addr, bool haddr,
    363     db_expr_t count, const char *modif)
    364 {
    365 
    366 	sched_print_runqueue(db_printf);
    367 }
    368