b5329c1d85
message buffer has not yet been set up, mimicking code from the top of the sysctl routine for retrieving the message buffer. (2) Add a /l modifier to the trace command. This makes it print the backtrace using printf() instead of db_printf(), which has the nice side-effect of also putting it into the message buffer. A kernel with ddb in it but disabled (ie, ddb.onpanic set to zero) will print a backtrace (which ends up in the message buffer) before dumping (or not, depending on the value of kern.dump_on_panic) and rebooting, but if ddb is not disabled, the backtrace is not printed, and there's no way to get it to display a backtrace such that you can retrieve it after the dump. The backtrace printed by gdb is sometimes a little different. (3) Documentation for the above.
271 lines
6.9 KiB
C
271 lines
6.9 KiB
C
/* $NetBSD: db_xxx.c,v 1.22 2003/05/15 13:18:18 atatat Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1986, 1989, 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: kern_proc.c 8.4 (Berkeley) 1/4/94
|
|
*/
|
|
|
|
/*
|
|
* Miscellaneous DDB functions that are intimate (xxx) with various
|
|
* data structures and functions used by the kernel (proc, callout).
|
|
*/
|
|
|
|
#include "opt_kgdb.h"
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.22 2003/05/15 13:18:18 atatat Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/msgbuf.h>
|
|
|
|
#include <sys/callout.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/resourcevar.h>
|
|
|
|
#include <machine/db_machdep.h>
|
|
|
|
#include <ddb/db_access.h>
|
|
#include <ddb/db_command.h>
|
|
#include <ddb/db_interface.h>
|
|
#include <ddb/db_lex.h>
|
|
#include <ddb/db_output.h>
|
|
#include <ddb/db_sym.h>
|
|
#include <ddb/db_extern.h>
|
|
#ifdef KGDB
|
|
#include <sys/kgdb.h>
|
|
#endif
|
|
|
|
void
|
|
db_kill_proc(db_expr_t addr, int haddr, db_expr_t count, char *modif)
|
|
{
|
|
struct proc *p;
|
|
db_expr_t pid, sig;
|
|
int t;
|
|
|
|
/* What pid? */
|
|
if (!db_expression(&pid)) {
|
|
db_error("pid?\n");
|
|
/*NOTREACHED*/
|
|
}
|
|
/* What sig? */
|
|
t = db_read_token();
|
|
if (t == tCOMMA) {
|
|
if (!db_expression(&sig)) {
|
|
db_error("sig?\n");
|
|
/*NOTREACHED*/
|
|
}
|
|
} else {
|
|
db_unread_token(t);
|
|
sig = 15;
|
|
}
|
|
if (db_read_token() != tEOL) {
|
|
db_error("?\n");
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
p = pfind((pid_t)pid);
|
|
if (p == NULL) {
|
|
db_error("no such proc\n");
|
|
/*NOTREACHED*/
|
|
}
|
|
psignal(p, (int)sig);
|
|
}
|
|
|
|
#ifdef KGDB
|
|
void
|
|
db_kgdb_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif)
|
|
{
|
|
kgdb_active++;
|
|
kgdb_trap(db_trap_type, DDB_REGS);
|
|
kgdb_active--;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
db_show_all_procs(db_expr_t addr, int haddr, db_expr_t count, char *modif)
|
|
{
|
|
int i;
|
|
|
|
char *mode;
|
|
struct proc *p, *pp, *cp;
|
|
struct lwp *l, *cl;
|
|
struct timeval tv[2];
|
|
const struct proclist_desc *pd;
|
|
|
|
if (modif[0] == 0)
|
|
modif[0] = 'n'; /* default == normal mode */
|
|
|
|
mode = strchr("mawln", modif[0]);
|
|
if (mode == NULL || *mode == 'm') {
|
|
db_printf("usage: show all procs [/a] [/n] [/w]\n");
|
|
db_printf("\t/a == show process address info\n");
|
|
db_printf("\t/l == show LWP info\n");
|
|
db_printf("\t/n == show normal process info [default]\n");
|
|
db_printf("\t/w == show process wait/emul info\n");
|
|
return;
|
|
}
|
|
|
|
switch (*mode) {
|
|
case 'a':
|
|
db_printf(" PID %10s %18s %18s %18s\n",
|
|
"COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
|
|
break;
|
|
case 'l':
|
|
db_printf(" PID %4s S %7s %18s %18s %-12s\n",
|
|
"LID", "FLAGS", "STRUCT LWP *", "UAREA *", "WAIT");
|
|
break;
|
|
case 'n':
|
|
db_printf(" PID %8s %8s %10s S %7s %4s %16s %7s\n",
|
|
"PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
|
|
break;
|
|
case 'w':
|
|
db_printf(" PID %10s %8s %4s %5s %5s %-12s%s\n",
|
|
"COMMAND", "EMUL", "PRI", "UTIME", "STIME",
|
|
"WAIT-MSG", "WAIT-CHANNEL");
|
|
break;
|
|
}
|
|
|
|
/* XXX LOCKING XXX */
|
|
pd = proclists;
|
|
cp = curproc;
|
|
cl = curlwp;
|
|
for (pd = proclists; pd->pd_list != NULL; pd++) {
|
|
LIST_FOREACH(p, pd->pd_list, p_list) {
|
|
pp = p->p_pptr;
|
|
if (p->p_stat == 0) {
|
|
continue;
|
|
}
|
|
l = LIST_FIRST(&p->p_lwps);
|
|
db_printf("%c%-10d", " >"[cp == p], p->p_pid);
|
|
|
|
switch (*mode) {
|
|
|
|
case 'a':
|
|
db_printf("%10.10s %18p %18p %18p\n",
|
|
p->p_comm, p,
|
|
l != NULL ? l->l_addr : 0,
|
|
p->p_vmspace);
|
|
break;
|
|
case 'l':
|
|
while (l != NULL) {
|
|
db_printf("%c%4d %d %#7x %18p %18p %s\n",
|
|
" >"[cl == l], l->l_lid,
|
|
l->l_stat, l->l_flag, l,
|
|
l->l_addr,
|
|
(l->l_wchan && l->l_wmesg) ?
|
|
l->l_wmesg : "");
|
|
|
|
l = LIST_NEXT(l, l_sibling);
|
|
if (l)
|
|
db_printf("%11s","");
|
|
}
|
|
break;
|
|
case 'n':
|
|
db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
|
|
pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
|
|
p->p_cred->p_ruid, p->p_stat, p->p_flag,
|
|
p->p_nlwps, p->p_comm,
|
|
(p->p_nlwps != 1) ? "*" : (
|
|
(l->l_wchan && l->l_wmesg) ?
|
|
l->l_wmesg : ""));
|
|
break;
|
|
|
|
case 'w':
|
|
db_printf("%10s %8s %4d", p->p_comm,
|
|
p->p_emul->e_name,
|
|
(l != NULL) ? l->l_priority : -1);
|
|
calcru(p, &tv[0], &tv[1], NULL);
|
|
for (i = 0; i < 2; ++i) {
|
|
db_printf("%4ld.%1ld",
|
|
(long)tv[i].tv_sec,
|
|
(long)tv[i].tv_usec/100000);
|
|
}
|
|
if (p->p_nlwps == 1) {
|
|
if (l->l_wchan && l->l_wmesg) {
|
|
db_printf(" %-12s", l->l_wmesg);
|
|
db_printsym(
|
|
(db_expr_t)(intptr_t)l->l_wchan,
|
|
DB_STGY_XTRN, db_printf);
|
|
} } else {
|
|
db_printf(" * ");
|
|
}
|
|
db_printf("\n");
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
db_dmesg(db_expr_t addr, int haddr, db_expr_t count, char *modif)
|
|
{
|
|
struct kern_msgbuf *mbp;
|
|
int ch, newl, skip, i;
|
|
char *p, *bufdata;
|
|
|
|
if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
|
|
db_printf("message buffer not available\n");
|
|
return;
|
|
}
|
|
|
|
mbp = msgbufp;
|
|
bufdata = &mbp->msg_bufc[0];
|
|
|
|
for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
|
|
i < mbp->msg_bufs; i++, p++) {
|
|
if (p == bufdata + mbp->msg_bufs)
|
|
p = bufdata;
|
|
ch = *p;
|
|
/* Skip "\n<.*>" syslog sequences. */
|
|
if (skip) {
|
|
if (ch == '>')
|
|
newl = skip = 0;
|
|
continue;
|
|
}
|
|
if (newl && ch == '<') {
|
|
skip = 1;
|
|
continue;
|
|
}
|
|
if (ch == '\0')
|
|
continue;
|
|
newl = ch == '\n';
|
|
db_printf("%c", ch);
|
|
}
|
|
if (!newl)
|
|
db_printf("\n");
|
|
}
|