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If the position of the formatted panic string can be found in the

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message buffer, use that instead of the raw panic string.

Suggested by Jason Thorpe eons ago.
This commit is contained in:
simonb 2001-05-06 13:36:51 +00:00
parent 6a2acde042
commit 1547b056d0
1 changed files with 83 additions and 14 deletions
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97
sbin/savecore/savecore.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: savecore.c,v 1.50 2001/01/11 20:27:12 martin Exp $ */
/* $NetBSD: savecore.c,v 1.51 2001/05/06 13:36:51 simonb Exp $ */
/*-
* Copyright (c) 1986, 1992, 1993
@ -43,13 +43,13 @@ __COPYRIGHT("@(#) Copyright (c) 1986, 1992, 1993\n\
#if 0
static char sccsid[] = "@(#)savecore.c 8.5 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: savecore.c,v 1.50 2001/01/11 20:27:12 martin Exp $");
__RCSID("$NetBSD: savecore.c,v 1.51 2001/05/06 13:36:51 simonb Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/msgbuf.h>
#include <sys/syslog.h>
#include <sys/time.h>
@ -58,6 +58,7 @@ __RCSID("$NetBSD: savecore.c,v 1.50 2001/01/11 20:27:12 martin Exp $");
#include <fcntl.h>
#include <nlist.h>
#include <paths.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -69,24 +70,30 @@ __RCSID("$NetBSD: savecore.c,v 1.50 2001/01/11 20:27:12 martin Exp $");
extern FILE *zopen(const char *fname, const char *mode);
#define KREAD(kd, addr, p)\
#define KREAD(kd, addr, p)\
(kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p)))
struct nlist current_nl[] = { /* Namelist for currently running system. */
#define X_DUMPDEV 0
#define X_DUMPDEV 0
{ "_dumpdev" },
#define X_DUMPLO 1
#define X_DUMPLO 1
{ "_dumplo" },
#define X_TIME 2
#define X_TIME 2
{ "_time" },
#define X_DUMPSIZE 3
{ "_dumpsize" },
#define X_VERSION 4
#define X_VERSION 4
{ "_version" },
#define X_PANICSTR 5
{ "_panicstr" },
#define X_DUMPMAG 6
#define X_DUMPMAG 5
{ "_dumpmag" },
#define X_PANICSTR 6
{ "_panicstr" },
#define X_PANICSTART 7
{ "_panicstart" },
#define X_PANICEND 8
{ "_panicend" },
#define X_MSGBUF 9
{ "_msgbufp" },
{ NULL },
};
int cursyms[] = { X_DUMPDEV, X_DUMPLO, X_VERSION, X_DUMPMAG, -1 };
@ -98,8 +105,11 @@ struct nlist dump_nl[] = { /* Name list for dumped system. */
{ "_time" },
{ "_dumpsize" },
{ "_version" },
{ "_panicstr" },
{ "_dumpmag" },
{ "_panicstr" },
{ "_panicstart" },
{ "_panicend" },
{ "_msgbufp" },
{ NULL },
};
@ -314,8 +324,9 @@ kmem_setup(void)
void
check_kmem(void)
{
char *cp;
long panicloc;
char *cp, *bufdata;
struct kern_msgbuf msgbuf, *bufp;
long panicloc, panicstart, panicend;
char core_vers[1024];
(void)kvm_read(kd_dump, dump_nl[X_VERSION].n_value, core_vers,
@ -327,6 +338,64 @@ check_kmem(void)
"warning: %s version mismatch:\n\t%s\nand\t%s\n",
kernel, vers, core_vers);
panicstart = panicend = 0;
if (KREAD(kd_dump, dump_nl[X_PANICSTART].n_value, &panicstart) != 0) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (KREAD(kd_dump, dump_nl[X_PANICEND].n_value, &panicend) != 0) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (panicstart != 0 && panicend != 0) {
if (KREAD(kd_dump, dump_nl[X_MSGBUF].n_value, &bufp)) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (kvm_read(kd_dump, (long)bufp, &msgbuf,
offsetof(struct kern_msgbuf, msg_bufc)) !=
offsetof(struct kern_msgbuf, msg_bufc)) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
if (msgbuf.msg_magic != MSG_MAGIC) {
if (verbose)
syslog(LOG_WARNING, "msgbuf magic incorrect");
goto nomsguf;
}
bufdata = malloc(msgbuf.msg_bufs);
if (bufdata == NULL) {
if (verbose)
syslog(LOG_WARNING, "couldn't allocate space for msgbuf data");
goto nomsguf;
}
if (kvm_read(kd_dump, (long)&bufp->msg_bufc, bufdata,
msgbuf.msg_bufs) != msgbuf.msg_bufs) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));
goto nomsguf;
}
cp = panic_mesg;
while (panicstart != panicend && cp < &panic_mesg[sizeof(panic_mesg)-1]) {
*cp++ = bufdata[panicstart];
panicstart++;
if (panicstart >= msgbuf.msg_bufs)
panicstart = 0;
}
/* Don't end in a new-line */
cp = &panic_mesg[strlen(panic_mesg)] - 1;
if (*cp == '\n')
*cp = '\0';
panic_mesg[sizeof(panic_mesg) - 1] = '\0';
panicstr = 1; /* anything not zero */
return;
}
nomsguf:
if (KREAD(kd_dump, dump_nl[X_PANICSTR].n_value, &panicstr) != 0) {
if (verbose)
syslog(LOG_WARNING, "kvm_read: %s", kvm_geterr(kd_dump));