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db_xxx.c revision 1.42.4.1 
      1 /*	$NetBSD: db_xxx.c,v 1.42.4.1 2007/05/27 00:15:12 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 1.42.4.1 2007/05/27 00:15:12 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_all_procs(db_expr_t addr, bool haddr,
    119     db_expr_t count, const char *modif)
    120 {
    121 	int i;
    122 
    123 	const char *mode;
    124 	struct proc *p, *pp, *cp;
    125 	struct lwp *l, *cl;
    126 	struct timeval tv[2];
    127 	const struct proclist_desc *pd;
    128 	char nbuf[MAXCOMLEN + 1];
    129 
    130 	if (modif[0] == 0)
    131 		mode = "n";			/* default == normal mode */
    132 	else
    133 		mode = strchr("mawln", modif[0]);
    134 
    135 	if (mode == NULL || *mode == 'm') {
    136 		db_printf("usage: show all procs [/a] [/l] [/n] [/w]\n");
    137 		db_printf("\t/a == show process address info\n");
    138 		db_printf("\t/l == show LWP info\n");
    139 		db_printf("\t/n == show normal process info [default]\n");
    140 		db_printf("\t/w == show process wait/emul info\n");
    141 		return;
    142 	}
    143 
    144 	switch (*mode) {
    145 	case 'a':
    146 		db_printf(" PID       %10s %18s %18s %18s\n",
    147 		    "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
    148 		break;
    149 	case 'l':
    150 		db_printf(" PID        %4s S %9s %18s %18s %-8s\n",
    151 		    "LID", "FLAGS", "STRUCT LWP *", "NAME", "WAIT");
    152 		break;
    153 	case 'n':
    154 		db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
    155 		    "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
    156 		break;
    157 	case 'w':
    158 		db_printf(" PID       %10s %8s %4s %5s %5s %-12s%s\n",
    159 		    "COMMAND", "EMUL", "PRI", "UTIME", "STIME",
    160 		    "WAIT-MSG", "WAIT-CHANNEL");
    161 		break;
    162 	}
    163 
    164 	/* XXX LOCKING XXX */
    165 	pd = proclists;
    166 	cp = curproc;
    167 	cl = curlwp;
    168 	for (pd = proclists; pd->pd_list != NULL; pd++) {
    169 		LIST_FOREACH(p, pd->pd_list, p_list) {
    170 			pp = p->p_pptr;
    171 			if (p->p_stat == 0) {
    172 				continue;
    173 			}
    174 			l = LIST_FIRST(&p->p_lwps);
    175 			db_printf("%c%-10d", (cp == p ? '>' : ' '), p->p_pid);
    176 
    177 			switch (*mode) {
    178 
    179 			case 'a':
    180 				db_printf("%10.10s %18lx %18lx %18lx\n",
    181 				    p->p_comm, (long)p,
    182 				    (long)(l != NULL ? l->l_addr : 0),
    183 				    (long)p->p_vmspace);
    184 				break;
    185 			case 'l':
    186 				 while (l != NULL) {
    187 				 	if (l->l_name != NULL) {
    188 				 		snprintf(nbuf, sizeof(nbuf),
    189 				 		    "%s", l->l_name);
    190 					} else
    191 				 		snprintf(nbuf, sizeof(nbuf),
    192 				 		    "%s", p->p_comm);
    193 					db_printf("%c%4d %d %9x %18lx %18s %-8s\n",
    194 					    (cl == l ? '>' : ' '), l->l_lid,
    195 					    l->l_stat, l->l_flag, (long)l, nbuf,
    196 					    (l->l_wchan && l->l_wmesg) ?
    197 					    l->l_wmesg : "");
    198 
    199 					l = LIST_NEXT(l, l_sibling);
    200 					if (l)
    201 						db_printf("%11s","");
    202 				}
    203 				break;
    204 			case 'n':
    205 				db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
    206 				    pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
    207 				    kauth_cred_getuid(p->p_cred), p->p_stat, p->p_flag,
    208 				    p->p_nlwps, p->p_comm,
    209 				    (p->p_nlwps != 1) ? "*" : (
    210 				    (l->l_wchan && l->l_wmesg) ?
    211 				    l->l_wmesg : ""));
    212 				break;
    213 
    214 			case 'w':
    215 				db_printf("%10s %8s %4d", p->p_comm,
    216 				    p->p_emul->e_name,
    217 				    (l != NULL) ? l->l_priority : -1);
    218 				calcru(p, &tv[0], &tv[1], NULL, NULL);
    219 				for (i = 0; i < 2; ++i) {
    220 					db_printf("%4ld.%1ld",
    221 					    (long)tv[i].tv_sec,
    222 					    (long)tv[i].tv_usec/100000);
    223 				}
    224 				if (p->p_nlwps == 1) {
    225 				if (l->l_wchan && l->l_wmesg) {
    226 					db_printf(" %-12s", l->l_wmesg);
    227 					db_printsym(
    228 					    (db_expr_t)(intptr_t)l->l_wchan,
    229 					    DB_STGY_XTRN, db_printf);
    230 				} } else {
    231 					db_printf(" * ");
    232 				}
    233 				db_printf("\n");
    234 				break;
    235 
    236 			}
    237 		}
    238 	}
    239 }
    240 
    241 void
    242 db_show_all_pools(db_expr_t addr, bool haddr,
    243     db_expr_t count, const char *modif)
    244 {
    245 
    246 	pool_printall(modif, db_printf);
    247 }
    248 
    249 void
    250 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count,
    251     const char *modif)
    252 {
    253 	struct kern_msgbuf *mbp;
    254 	db_expr_t print;
    255 	int ch, newl, skip, i;
    256 	char *p, *bufdata;
    257 
    258         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
    259 		db_printf("message buffer not available\n");
    260 		return;
    261 	}
    262 
    263 	mbp = msgbufp;
    264 	bufdata = &mbp->msg_bufc[0];
    265 
    266 	if (haddr && addr < mbp->msg_bufs)
    267 		print = addr;
    268 	else
    269 		print = mbp->msg_bufs;
    270 
    271 	for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
    272 	    i < mbp->msg_bufs; i++, p++) {
    273 		if (p == bufdata + mbp->msg_bufs)
    274 			p = bufdata;
    275 		if (i < mbp->msg_bufs - print)
    276 			continue;
    277 		ch = *p;
    278 		/* Skip "\n<.*>" syslog sequences. */
    279 		if (skip) {
    280 			if (ch == '>')
    281 				newl = skip = 0;
    282 			continue;
    283 		}
    284 		if (newl && ch == '<') {
    285 			skip = 1;
    286 			continue;
    287 		}
    288 		if (ch == '\0')
    289 			continue;
    290 		newl = ch == '\n';
    291 		db_printf("%c", ch);
    292 	}
    293 	if (!newl)
    294 		db_printf("\n");
    295 }
    296 
    297 #ifdef __HAVE_BIGENDIAN_BITOPS
    298 #define	RQMASK(n) (0x80000000 >> (n))
    299 #else
    300 #define	RQMASK(n) (0x00000001 << (n))
    301 #endif
    302 
    303 void
    304 db_show_sched_qs(db_expr_t addr, bool haddr,
    305     db_expr_t count, const char *modif)
    306 {
    307 	struct prochd *ph;
    308 	struct lwp *l;
    309 	int i, first;
    310 
    311 	for (i = 0; i < RUNQUE_NQS; i++)
    312 	{
    313 		first = 1;
    314 		ph = &sched_qs[i];
    315 		for (l = ph->ph_link; l != (void *)ph; l = l->l_forw) {
    316 			if (first) {
    317 				db_printf("%c%d",
    318 				    (sched_whichqs & RQMASK(i))
    319 				    ? ' ' : '!', i);
    320 				first = 0;
    321 			}
    322 			db_printf("\t%d.%d (%s) pri=%d usrpri=%d\n",
    323 			    l->l_proc->p_pid,
    324 			    l->l_lid, l->l_proc->p_comm,
    325 			    (int)l->l_priority, (int)l->l_usrpri);
    326 		}
    327 	}
    328 }
    329