diff options
Diffstat (limited to 'sys/kern/kern_shutdown.c')
| -rw-r--r-- | sys/kern/kern_shutdown.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/sys/kern/kern_shutdown.c b/sys/kern/kern_shutdown.c index 13a9c7a..f8f676e 100644 --- a/sys/kern/kern_shutdown.c +++ b/sys/kern/kern_shutdown.c @@ -40,6 +40,8 @@ */ #include "opt_ddb.h" +#include "opt_ddb_trace.h" +#include "opt_ddb_unattended.h" #include "opt_hw_wdog.h" #include "opt_panic.h" #include "opt_show_busybufs.h" @@ -91,6 +93,14 @@ int debugger_on_panic = 1; #endif SYSCTL_INT(_debug, OID_AUTO, debugger_on_panic, CTLFLAG_RW, &debugger_on_panic, 0, "Run debugger on kernel panic"); + +#ifdef DDB_TRACE +int trace_on_panic = 1; +#else +int trace_on_panic = 0; +#endif +SYSCTL_INT(_debug, OID_AUTO, trace_on_panic, CTLFLAG_RW, + &trace_on_panic, 0, "Print stack trace on kernel panic"); #endif int sync_on_panic = 1; @@ -434,7 +444,7 @@ void panic(const char *fmt, ...) { struct thread *td = curthread; - int bootopt; + int bootopt, newpanic; va_list ap; static char buf[256]; @@ -453,10 +463,13 @@ panic(const char *fmt, ...) #endif bootopt = RB_AUTOBOOT | RB_DUMP; + newpanic = 0; if (panicstr) bootopt |= RB_NOSYNC; - else + else { panicstr = fmt; + newpanic = 1; + } va_start(ap, fmt); (void)vsnprintf(buf, sizeof(buf), fmt, ap); @@ -475,6 +488,8 @@ panic(const char *fmt, ...) #endif #if defined(DDB) + if (newpanic && trace_on_panic) + db_print_backtrace(); if (debugger_on_panic) Debugger ("panic"); #ifdef RESTARTABLE_PANICS |
