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db_xxx.c revision 1.40 
      1 /*	$NetBSD: db_xxx.c,v 1.40 2006/11/16 01:32:44 christos 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 1.40 2006/11/16 01:32:44 christos 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, int 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, int 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, int 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 
    129 	if (modif[0] == 0)
    130 		mode = "n";			/* default == normal mode */
    131 	else
    132 		mode = strchr("mawln", modif[0]);
    133 
    134 	if (mode == NULL || *mode == 'm') {
    135 		db_printf("usage: show all procs [/a] [/l] [/n] [/w]\n");
    136 		db_printf("\t/a == show process address info\n");
    137 		db_printf("\t/l == show LWP info\n");
    138 		db_printf("\t/n == show normal process info [default]\n");
    139 		db_printf("\t/w == show process wait/emul info\n");
    140 		return;
    141 	}
    142 
    143 	switch (*mode) {
    144 	case 'a':
    145 		db_printf(" PID       %10s %18s %18s %18s\n",
    146 		    "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
    147 		break;
    148 	case 'l':
    149 		db_printf(" PID        %4s S %9s %18s %18s %-12s\n",
    150 		    "LID", "FLAGS", "STRUCT LWP *", "UAREA *", "WAIT");
    151 		break;
    152 	case 'n':
    153 		db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
    154 		    "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
    155 		break;
    156 	case 'w':
    157 		db_printf(" PID       %10s %8s %4s %5s %5s %-12s%s\n",
    158 		    "COMMAND", "EMUL", "PRI", "UTIME", "STIME",
    159 		    "WAIT-MSG", "WAIT-CHANNEL");
    160 		break;
    161 	}
    162 
    163 	/* XXX LOCKING XXX */
    164 	pd = proclists;
    165 	cp = curproc;
    166 	cl = curlwp;
    167 	for (pd = proclists; pd->pd_list != NULL; pd++) {
    168 		LIST_FOREACH(p, pd->pd_list, p_list) {
    169 			pp = p->p_pptr;
    170 			if (p->p_stat == 0) {
    171 				continue;
    172 			}
    173 			l = LIST_FIRST(&p->p_lwps);
    174 			db_printf("%c%-10d", (cp == p ? '>' : ' '), p->p_pid);
    175 
    176 			switch (*mode) {
    177 
    178 			case 'a':
    179 				db_printf("%10.10s %18p %18p %18p\n",
    180 				    p->p_comm, p,
    181 				    l != NULL ? l->l_addr : 0,
    182 				    p->p_vmspace);
    183 				break;
    184 			case 'l':
    185 				 while (l != NULL) {
    186 					db_printf("%c%4d %d %#9x %18p %18p %s\n",
    187 					    (cl == l ? '>' : ' '), l->l_lid,
    188 					    l->l_stat, l->l_flag, l,
    189 					    l->l_addr,
    190 					    (l->l_wchan && l->l_wmesg) ?
    191 					    l->l_wmesg : "");
    192 
    193 					l = LIST_NEXT(l, l_sibling);
    194 					if (l)
    195 						db_printf("%11s","");
    196 				}
    197 				break;
    198 			case 'n':
    199 				db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
    200 				    pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
    201 				    kauth_cred_getuid(p->p_cred), p->p_stat, p->p_flag,
    202 				    p->p_nlwps, p->p_comm,
    203 				    (p->p_nlwps != 1) ? "*" : (
    204 				    (l->l_wchan && l->l_wmesg) ?
    205 				    l->l_wmesg : ""));
    206 				break;
    207 
    208 			case 'w':
    209 				db_printf("%10s %8s %4d", p->p_comm,
    210 				    p->p_emul->e_name,
    211 				    (l != NULL) ? l->l_priority : -1);
    212 				calcru(p, &tv[0], &tv[1], NULL);
    213 				for (i = 0; i < 2; ++i) {
    214 					db_printf("%4ld.%1ld",
    215 					    (long)tv[i].tv_sec,
    216 					    (long)tv[i].tv_usec/100000);
    217 				}
    218 				if (p->p_nlwps == 1) {
    219 				if (l->l_wchan && l->l_wmesg) {
    220 					db_printf(" %-12s", l->l_wmesg);
    221 					db_printsym(
    222 					    (db_expr_t)(intptr_t)l->l_wchan,
    223 					    DB_STGY_XTRN, db_printf);
    224 				} } else {
    225 					db_printf(" * ");
    226 				}
    227 				db_printf("\n");
    228 				break;
    229 
    230 			}
    231 		}
    232 	}
    233 }
    234 
    235 void
    236 db_show_all_pools(db_expr_t addr, int haddr,
    237     db_expr_t count, const char *modif)
    238 {
    239 
    240 	pool_printall(modif, db_printf);
    241 }
    242 
    243 void
    244 db_dmesg(db_expr_t addr, int haddr, db_expr_t count,
    245     const char *modif)
    246 {
    247 	struct kern_msgbuf *mbp;
    248 	db_expr_t print;
    249 	int ch, newl, skip, i;
    250 	char *p, *bufdata;
    251 
    252         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
    253 		db_printf("message buffer not available\n");
    254 		return;
    255 	}
    256 
    257 	mbp = msgbufp;
    258 	bufdata = &mbp->msg_bufc[0];
    259 
    260 	if (haddr && addr < mbp->msg_bufs)
    261 		print = addr;
    262 	else
    263 		print = mbp->msg_bufs;
    264 
    265 	for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
    266 	    i < mbp->msg_bufs; i++, p++) {
    267 		if (p == bufdata + mbp->msg_bufs)
    268 			p = bufdata;
    269 		if (i < mbp->msg_bufs - print)
    270 			continue;
    271 		ch = *p;
    272 		/* Skip "\n<.*>" syslog sequences. */
    273 		if (skip) {
    274 			if (ch == '>')
    275 				newl = skip = 0;
    276 			continue;
    277 		}
    278 		if (newl && ch == '<') {
    279 			skip = 1;
    280 			continue;
    281 		}
    282 		if (ch == '\0')
    283 			continue;
    284 		newl = ch == '\n';
    285 		db_printf("%c", ch);
    286 	}
    287 	if (!newl)
    288 		db_printf("\n");
    289 }
    290 
    291 #ifdef __HAVE_BIGENDIAN_BITOPS
    292 #define	RQMASK(n) (0x80000000 >> (n))
    293 #else
    294 #define	RQMASK(n) (0x00000001 << (n))
    295 #endif
    296 
    297 void
    298 db_show_sched_qs(db_expr_t addr, int haddr,
    299     db_expr_t count, const char *modif)
    300 {
    301 	struct prochd *ph;
    302 	struct lwp *l;
    303 	int i, first;
    304 
    305 	for (i = 0; i < RUNQUE_NQS; i++)
    306 	{
    307 		first = 1;
    308 		ph = &sched_qs[i];
    309 		for (l = ph->ph_link; l != (void *)ph; l = l->l_forw) {
    310 			if (first) {
    311 				db_printf("%c%d",
    312 				    (sched_whichqs & RQMASK(i))
    313 				    ? ' ' : '!', i);
    314 				first = 0;
    315 			}
    316 			db_printf("\t%d.%d (%s) pri=%d usrpri=%d\n",
    317 			    l->l_proc->p_pid,
    318 			    l->l_lid, l->l_proc->p_comm,
    319 			    (int)l->l_priority, (int)l->l_usrpri);
    320 		}
    321 	}
    322 }
    323