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db_xxx.c revision 1.45 
      1 /*	$NetBSD: db_xxx.c,v 1.45 2007/07/09 21:10:47 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 "opt_kgdb.h"
     40 
     41 #include <sys/cdefs.h>
     42 __KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.45 2007/07/09 21:10:47 ad Exp $");
     43 
     44 #include <sys/param.h>
     45 #include <sys/systm.h>
     46 #include <sys/kernel.h>
     47 #include <sys/proc.h>
     48 #include <sys/msgbuf.h>
     49 
     50 #include <sys/callout.h>
     51 #include <sys/signalvar.h>
     52 #include <sys/resourcevar.h>
     53 #include <sys/pool.h>
     54 #include <sys/kauth.h>
     55 
     56 #include <machine/db_machdep.h>
     57 
     58 #include <ddb/db_access.h>
     59 #include <ddb/db_command.h>
     60 #include <ddb/db_interface.h>
     61 #include <ddb/db_lex.h>
     62 #include <ddb/db_output.h>
     63 #include <ddb/db_sym.h>
     64 #include <ddb/db_extern.h>
     65 #ifdef KGDB
     66 #include <sys/kgdb.h>
     67 #endif
     68 
     69 void
     70 db_kill_proc(db_expr_t addr, bool haddr,
     71     db_expr_t count, const char *modif)
     72 {
     73 	struct proc *p;
     74 	db_expr_t pid, sig;
     75 	int t;
     76 
     77 	/* What pid? */
     78 	if (!db_expression(&pid)) {
     79 		db_error("pid?\n");
     80 		/*NOTREACHED*/
     81 	}
     82 	/* What sig? */
     83 	t = db_read_token();
     84 	if (t == tCOMMA) {
     85 		if (!db_expression(&sig)) {
     86 			db_error("sig?\n");
     87 			/*NOTREACHED*/
     88 		}
     89 	} else {
     90 		db_unread_token(t);
     91 		sig = 15;
     92 	}
     93 	if (db_read_token() != tEOL) {
     94 		db_error("?\n");
     95 		/*NOTREACHED*/
     96 	}
     97 
     98 	p = pfind((pid_t)pid);
     99 	if (p == NULL) {
    100 		db_error("no such proc\n");
    101 		/*NOTREACHED*/
    102 	}
    103 	psignal(p, (int)sig);
    104 }
    105 
    106 #ifdef KGDB
    107 void
    108 db_kgdb_cmd(db_expr_t addr, bool haddr,
    109     db_expr_t count, const char *modif)
    110 {
    111 	kgdb_active++;
    112 	kgdb_trap(db_trap_type, DDB_REGS);
    113 	kgdb_active--;
    114 }
    115 #endif
    116 
    117 void
    118 db_show_aio_jobs(db_expr_t addr, bool haddr,
    119     db_expr_t count, const char *modif)
    120 {
    121 	aio_print_jobs(db_printf);
    122 }
    123 
    124 void
    125 db_show_all_procs(db_expr_t addr, bool haddr,
    126     db_expr_t count, const char *modif)
    127 {
    128 	int i;
    129 
    130 	const char *mode;
    131 	struct proc *p, *pp, *cp;
    132 	struct lwp *l, *cl;
    133 	struct timeval tv[2];
    134 	const struct proclist_desc *pd;
    135 	char nbuf[MAXCOMLEN + 1];
    136 
    137 	if (modif[0] == 0)
    138 		mode = "n";			/* default == normal mode */
    139 	else
    140 		mode = strchr("mawln", modif[0]);
    141 
    142 	if (mode == NULL || *mode == 'm') {
    143 		db_printf("usage: show all procs [/a] [/l] [/n] [/w]\n");
    144 		db_printf("\t/a == show process address info\n");
    145 		db_printf("\t/l == show LWP info\n");
    146 		db_printf("\t/n == show normal process info [default]\n");
    147 		db_printf("\t/w == show process wait/emul info\n");
    148 		return;
    149 	}
    150 
    151 	switch (*mode) {
    152 	case 'a':
    153 		db_printf(" PID       %10s %18s %18s %18s\n",
    154 		    "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
    155 		break;
    156 	case 'l':
    157 		db_printf(" PID        %4s S %9s %18s %18s %-8s\n",
    158 		    "LID", "FLAGS", "STRUCT LWP *", "NAME", "WAIT");
    159 		break;
    160 	case 'n':
    161 		db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
    162 		    "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
    163 		break;
    164 	case 'w':
    165 		db_printf(" PID       %10s %8s %4s %5s %5s %-12s%s\n",
    166 		    "COMMAND", "EMUL", "PRI", "UTIME", "STIME",
    167 		    "WAIT-MSG", "WAIT-CHANNEL");
    168 		break;
    169 	}
    170 
    171 	/* XXX LOCKING XXX */
    172 	pd = proclists;
    173 	cp = curproc;
    174 	cl = curlwp;
    175 	for (pd = proclists; pd->pd_list != NULL; pd++) {
    176 		LIST_FOREACH(p, pd->pd_list, p_list) {
    177 			pp = p->p_pptr;
    178 			if (p->p_stat == 0) {
    179 				continue;
    180 			}
    181 			l = LIST_FIRST(&p->p_lwps);
    182 			db_printf("%c%-10d", (cp == p ? '>' : ' '), p->p_pid);
    183 
    184 			switch (*mode) {
    185 
    186 			case 'a':
    187 				db_printf("%10.10s %18lx %18lx %18lx\n",
    188 				    p->p_comm, (long)p,
    189 				    (long)(l != NULL ? l->l_addr : 0),
    190 				    (long)p->p_vmspace);
    191 				break;
    192 			case 'l':
    193 				 while (l != NULL) {
    194 				 	if (l->l_name != NULL) {
    195 				 		snprintf(nbuf, sizeof(nbuf),
    196 				 		    "%s", l->l_name);
    197 					} else
    198 				 		snprintf(nbuf, sizeof(nbuf),
    199 				 		    "%s", p->p_comm);
    200 					db_printf("%c%4d %d %9x %18lx %18s %-8s\n",
    201 					    (cl == l ? '>' : ' '), l->l_lid,
    202 					    l->l_stat, l->l_flag, (long)l, nbuf,
    203 					    (l->l_wchan && l->l_wmesg) ?
    204 					    l->l_wmesg : "");
    205 
    206 					l = LIST_NEXT(l, l_sibling);
    207 					if (l)
    208 						db_printf("%11s","");
    209 				}
    210 				break;
    211 			case 'n':
    212 				db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
    213 				    pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
    214 				    kauth_cred_getuid(p->p_cred), p->p_stat, p->p_flag,
    215 				    p->p_nlwps, p->p_comm,
    216 				    (p->p_nlwps != 1) ? "*" : (
    217 				    (l->l_wchan && l->l_wmesg) ?
    218 				    l->l_wmesg : ""));
    219 				break;
    220 
    221 			case 'w':
    222 				db_printf("%10s %8s %4d", p->p_comm,
    223 				    p->p_emul->e_name,
    224 				    (l != NULL) ? l->l_priority : -1);
    225 				calcru(p, &tv[0], &tv[1], NULL, NULL);
    226 				for (i = 0; i < 2; ++i) {
    227 					db_printf("%4ld.%1ld",
    228 					    (long)tv[i].tv_sec,
    229 					    (long)tv[i].tv_usec/100000);
    230 				}
    231 				if (p->p_nlwps == 1) {
    232 				if (l->l_wchan && l->l_wmesg) {
    233 					db_printf(" %-12s", l->l_wmesg);
    234 					db_printsym(
    235 					    (db_expr_t)(intptr_t)l->l_wchan,
    236 					    DB_STGY_XTRN, db_printf);
    237 				} } else {
    238 					db_printf(" * ");
    239 				}
    240 				db_printf("\n");
    241 				break;
    242 
    243 			}
    244 		}
    245 	}
    246 }
    247 
    248 void
    249 db_show_all_pools(db_expr_t addr, bool haddr,
    250     db_expr_t count, const char *modif)
    251 {
    252 
    253 	pool_printall(modif, db_printf);
    254 }
    255 
    256 void
    257 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count,
    258     const char *modif)
    259 {
    260 	struct kern_msgbuf *mbp;
    261 	db_expr_t print;
    262 	int ch, newl, skip, i;
    263 	char *p, *bufdata;
    264 
    265         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
    266 		db_printf("message buffer not available\n");
    267 		return;
    268 	}
    269 
    270 	mbp = msgbufp;
    271 	bufdata = &mbp->msg_bufc[0];
    272 
    273 	if (haddr && addr < mbp->msg_bufs)
    274 		print = addr;
    275 	else
    276 		print = mbp->msg_bufs;
    277 
    278 	for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
    279 	    i < mbp->msg_bufs; i++, p++) {
    280 		if (p == bufdata + mbp->msg_bufs)
    281 			p = bufdata;
    282 		if (i < mbp->msg_bufs - print)
    283 			continue;
    284 		ch = *p;
    285 		/* Skip "\n<.*>" syslog sequences. */
    286 		if (skip) {
    287 			if (ch == '>')
    288 				newl = skip = 0;
    289 			continue;
    290 		}
    291 		if (newl && ch == '<') {
    292 			skip = 1;
    293 			continue;
    294 		}
    295 		if (ch == '\0')
    296 			continue;
    297 		newl = ch == '\n';
    298 		db_printf("%c", ch);
    299 	}
    300 	if (!newl)
    301 		db_printf("\n");
    302 }
    303 
    304 void
    305 db_show_sched_qs(db_expr_t addr, bool haddr,
    306     db_expr_t count, const char *modif)
    307 {
    308 
    309 	sched_print_runqueue(db_printf);
    310 }
    311