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author | phk <phk@FreeBSD.org> | 2003-01-04 20:54:58 +0000 |
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committer | phk <phk@FreeBSD.org> | 2003-01-04 20:54:58 +0000 |
commit | cd57ad899fc4b16669e8bd6f0ddc0d798d9b323f (patch) | |
tree | 03615131ce3e84045e995356032ffae0ee90cabe | |
parent | 1be94e24775ebfa19199eaee7957dca3b333efd2 (diff) | |
download | FreeBSD-src-cd57ad899fc4b16669e8bd6f0ddc0d798d9b323f.zip FreeBSD-src-cd57ad899fc4b16669e8bd6f0ddc0d798d9b323f.tar.gz |
Introduce the
void backtrace(void);
function which will print a backtrace if DDB is in the kernel and an
explanation if not.
This is useful for recording backtraces in non-fatal circumstances and
does not require pollution with DDB #includes in the files where it
is used.
It would of course be nice to have a non-DDB dependent version too,
but since the meat of a backtrace is MD it is probably not worth it.
-rw-r--r-- | sys/kern/kern_shutdown.c | 14 | ||||
-rw-r--r-- | sys/sys/systm.h | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/sys/kern/kern_shutdown.c b/sys/kern/kern_shutdown.c index 1867b8a..d63ece6 100644 --- a/sys/kern/kern_shutdown.c +++ b/sys/kern/kern_shutdown.c @@ -438,6 +438,20 @@ shutdown_reset(void *junk, int howto) /* NOTREACHED */ /* assuming reset worked */ } +/* + * Print a backtrace if we can. + */ + +void +backtrace(void) +{ +#ifdef DDB + db_print_backtrace(); +#else + printf("Sorry, need DDB option to print backtrace"); +#endif +} + #ifdef SMP static u_int panic_cpu = NOCPU; #endif diff --git a/sys/sys/systm.h b/sys/sys/systm.h index e3b3a2a..1126762 100644 --- a/sys/sys/systm.h +++ b/sys/sys/systm.h @@ -135,6 +135,7 @@ void panic(const char *, ...) __printflike(1, 2); void panic(const char *, ...) __dead2 __printflike(1, 2); #endif +void backtrace(void); void cpu_boot(int); void cpu_rootconf(void); extern uint32_t crc32_tab[]; |