Home | History | Annotate | Line # | Download | only in ddb
db_xxx.c revision 1.32 
      1 /*	$NetBSD: db_xxx.c,v 1.32 2005/10/15 17:29:11 yamt 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 1.32 2005/10/15 17:29:11 yamt 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 
     54 #include <machine/db_machdep.h>
     55 
     56 #include <ddb/db_access.h>
     57 #include <ddb/db_command.h>
     58 #include <ddb/db_interface.h>
     59 #include <ddb/db_lex.h>
     60 #include <ddb/db_output.h>
     61 #include <ddb/db_sym.h>
     62 #include <ddb/db_extern.h>
     63 #ifdef KGDB
     64 #include <sys/kgdb.h>
     65 #endif
     66 
     67 void
     68 db_kill_proc(db_expr_t addr, int haddr, db_expr_t count, const char *modif)
     69 {
     70 	struct proc *p;
     71 	db_expr_t pid, sig;
     72 	int t;
     73 
     74 	/* What pid? */
     75 	if (!db_expression(&pid)) {
     76 		db_error("pid?\n");
     77 		/*NOTREACHED*/
     78 	}
     79 	/* What sig? */
     80 	t = db_read_token();
     81 	if (t == tCOMMA) {
     82 		if (!db_expression(&sig)) {
     83 			db_error("sig?\n");
     84 			/*NOTREACHED*/
     85 		}
     86 	} else {
     87 		db_unread_token(t);
     88 		sig = 15;
     89 	}
     90 	if (db_read_token() != tEOL) {
     91 		db_error("?\n");
     92 		/*NOTREACHED*/
     93 	}
     94 
     95 	p = pfind((pid_t)pid);
     96 	if (p == NULL) {
     97 		db_error("no such proc\n");
     98 		/*NOTREACHED*/
     99 	}
    100 	psignal(p, (int)sig);
    101 }
    102 
    103 #ifdef KGDB
    104 void
    105 db_kgdb_cmd(db_expr_t addr, int haddr, db_expr_t count, const char *modif)
    106 {
    107 	kgdb_active++;
    108 	kgdb_trap(db_trap_type, DDB_REGS);
    109 	kgdb_active--;
    110 }
    111 #endif
    112 
    113 void
    114 db_show_all_procs(db_expr_t addr, int haddr, db_expr_t count, const char *modif)
    115 {
    116 	int i;
    117 
    118 	const char *mode;
    119 	struct proc *p, *pp, *cp;
    120 	struct lwp *l, *cl;
    121 	struct timeval tv[2];
    122 	const struct proclist_desc *pd;
    123 
    124 	if (modif[0] == 0)
    125 		mode = "n";			/* default == normal mode */
    126 	else
    127 		mode = strchr("mawln", modif[0]);
    128 
    129 	if (mode == NULL || *mode == 'm') {
    130 		db_printf("usage: show all procs [/a] [/n] [/w]\n");
    131 		db_printf("\t/a == show process address info\n");
    132 		db_printf("\t/l == show LWP info\n");
    133 		db_printf("\t/n == show normal process info [default]\n");
    134 		db_printf("\t/w == show process wait/emul info\n");
    135 		return;
    136 	}
    137 
    138 	switch (*mode) {
    139 	case 'a':
    140 		db_printf(" PID       %10s %18s %18s %18s\n",
    141 		    "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
    142 		break;
    143 	case 'l':
    144 		db_printf(" PID        %4s S %9s %18s %18s %-12s\n",
    145 		    "LID", "FLAGS", "STRUCT LWP *", "UAREA *", "WAIT");
    146 		break;
    147 	case 'n':
    148 		db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
    149 		    "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
    150 		break;
    151 	case 'w':
    152 		db_printf(" PID       %10s %8s %4s %5s %5s %-12s%s\n",
    153 		    "COMMAND", "EMUL", "PRI", "UTIME", "STIME",
    154 		    "WAIT-MSG", "WAIT-CHANNEL");
    155 		break;
    156 	}
    157 
    158 	/* XXX LOCKING XXX */
    159 	pd = proclists;
    160 	cp = curproc;
    161 	cl = curlwp;
    162 	for (pd = proclists; pd->pd_list != NULL; pd++) {
    163 		LIST_FOREACH(p, pd->pd_list, p_list) {
    164 			pp = p->p_pptr;
    165 			if (p->p_stat == 0) {
    166 				continue;
    167 			}
    168 			l = LIST_FIRST(&p->p_lwps);
    169 			db_printf("%c%-10d", " >"[cp == p], p->p_pid);
    170 
    171 			switch (*mode) {
    172 
    173 			case 'a':
    174 				db_printf("%10.10s %18p %18p %18p\n",
    175 				    p->p_comm, p,
    176 				    l != NULL ? l->l_addr : 0,
    177 				    p->p_vmspace);
    178 				break;
    179 			case 'l':
    180 				 while (l != NULL) {
    181 					db_printf("%c%4d %d %#9x %18p %18p %s\n",
    182 					    " >"[cl == l], l->l_lid,
    183 					    l->l_stat, l->l_flag, l,
    184 					    l->l_addr,
    185 					    (l->l_wchan && l->l_wmesg) ?
    186 					    l->l_wmesg : "");
    187 
    188 					l = LIST_NEXT(l, l_sibling);
    189 					if (l)
    190 						db_printf("%11s","");
    191 				}
    192 				break;
    193 			case 'n':
    194 				db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
    195 				    pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
    196 				    p->p_cred->p_ruid, p->p_stat, p->p_flag,
    197 				    p->p_nlwps, p->p_comm,
    198 				    (p->p_nlwps != 1) ? "*" : (
    199 				    (l->l_wchan && l->l_wmesg) ?
    200 				    l->l_wmesg : ""));
    201 				break;
    202 
    203 			case 'w':
    204 				db_printf("%10s %8s %4d", p->p_comm,
    205 				    p->p_emul->e_name,
    206 				    (l != NULL) ? l->l_priority : -1);
    207 				calcru(p, &tv[0], &tv[1], NULL);
    208 				for (i = 0; i < 2; ++i) {
    209 					db_printf("%4ld.%1ld",
    210 					    (long)tv[i].tv_sec,
    211 					    (long)tv[i].tv_usec/100000);
    212 				}
    213 				if (p->p_nlwps == 1) {
    214 				if (l->l_wchan && l->l_wmesg) {
    215 					db_printf(" %-12s", l->l_wmesg);
    216 					db_printsym(
    217 					    (db_expr_t)(intptr_t)l->l_wchan,
    218 					    DB_STGY_XTRN, db_printf);
    219 				} } else {
    220 					db_printf(" * ");
    221 				}
    222 				db_printf("\n");
    223 				break;
    224 
    225 			}
    226 		}
    227 	}
    228 }
    229 
    230 void
    231 db_dmesg(db_expr_t addr, int haddr, db_expr_t count, const char *modif)
    232 {
    233 	struct kern_msgbuf *mbp;
    234 	db_expr_t print;
    235 	int ch, newl, skip, i;
    236 	char *p, *bufdata;
    237 
    238         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
    239 		db_printf("message buffer not available\n");
    240 		return;
    241 	}
    242 
    243 	mbp = msgbufp;
    244 	bufdata = &mbp->msg_bufc[0];
    245 
    246 	if (haddr && addr < mbp->msg_bufs)
    247 		print = addr;
    248 	else
    249 		print = mbp->msg_bufs;
    250 
    251 	for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
    252 	    i < mbp->msg_bufs; i++, p++) {
    253 		if (p == bufdata + mbp->msg_bufs)
    254 			p = bufdata;
    255 		if (i < mbp->msg_bufs - print)
    256 			continue;
    257 		ch = *p;
    258 		/* Skip "\n<.*>" syslog sequences. */
    259 		if (skip) {
    260 			if (ch == '>')
    261 				newl = skip = 0;
    262 			continue;
    263 		}
    264 		if (newl && ch == '<') {
    265 			skip = 1;
    266 			continue;
    267 		}
    268 		if (ch == '\0')
    269 			continue;
    270 		newl = ch == '\n';
    271 		db_printf("%c", ch);
    272 	}
    273 	if (!newl)
    274 		db_printf("\n");
    275 }
    276 
    277 #ifdef __HAVE_BIGENDIAN_BITOPS
    278 #define	RQMASK(n) (0x80000000 >> (n))
    279 #else
    280 #define	RQMASK(n) (0x00000001 << (n))
    281 #endif
    282 
    283 void
    284 db_show_sched_qs(db_expr_t addr, int haddr, db_expr_t count, const char *modif)
    285 {
    286 	struct prochd *ph;
    287 	struct lwp *l;
    288 	int i, first;
    289 
    290 	for (i = 0; i < RUNQUE_NQS; i++)
    291 	{
    292 		first = 1;
    293 		ph = &sched_qs[i];
    294 		for (l = ph->ph_link; l != (struct lwp *)ph; l = l->l_forw) {
    295 			if (first) {
    296 				db_printf("%c%d",
    297 				    (sched_whichqs & RQMASK(i))
    298 				    ? ' ' : '!', i);
    299 				first = 0;
    300 			}
    301 			db_printf("\t%d.%d (%s) pri=%d usrpri=%d\n",
    302 			    l->l_proc->p_pid,
    303 			    l->l_lid, l->l_proc->p_comm,
    304 			    (int)l->l_priority, (int)l->l_usrpri);
    305 		}
    306 	}
    307 }
    308