Author: avg
Date: Tue Sep 21 15:07:44 2010
New Revision: 212964
URL: http://svn.freebsd.org/changeset/base/212964
Log:
kdb_backtrace: stack(9)-based code to print backtrace without any backend
The idea is to add KDB and KDB_TRACE options to GENERIC kernels on
stable branches, so that at least the minimal information is produced
for non-specific panics like traps on page faults.
The GENERICs in stable branches seem to already include STACK option.
Reviewed by: attilio
MFC after: 2 weeks
Modified:
head/sys/kern/subr_kdb.c
Modified: head/sys/kern/subr_kdb.c
==============================================================================
--- head/sys/kern/subr_kdb.c Tue Sep 21 12:57:43 2010 (r212963)
+++ head/sys/kern/subr_kdb.c Tue Sep 21 15:07:44 2010 (r212964)
@@ -28,6 +28,7 @@
__FBSDID("$FreeBSD$");
#include "opt_kdb.h"
+#include "opt_stack.h"
#include <sys/param.h>
#include <sys/systm.h>
@@ -37,6 +38,7 @@ __FBSDID("$FreeBSD$");
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/smp.h>
+#include <sys/stack.h>
#include <sys/sysctl.h>
#include <machine/kdb.h>
@@ -300,6 +302,15 @@ kdb_backtrace(void)
printf("KDB: stack backtrace:\n");
kdb_dbbe->dbbe_trace();
}
+#ifdef STACK
+ else {
+ struct stack st;
+
+ printf("KDB: stack backtrace:\n");
+ stack_save(&st);
+ stack_print(&st);
+ }
+#endif
}
/*
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