I came up with my own patch so I could kill -ABRT when I want
a core dump so I could debug at a later time. It seemed to ignore
kill -SEGV and kill -ABRT. If you are going make a change could
you make sure kill -ABRT makes it dump core and exit.
Here was the path that I was using:
% cat autofs-5.0.4-abortable
--- autofs-5.0.4/daemon/automount.c 2009-03-17 17:56:22.000000000 -0700
+++ autofs-5.0.4-hack1/daemon/automount.c 2009-03-17
17:56:57.000000000 -0700
@@ -1331,11 +1331,18 @@
case SIGUSR1:
do_signals(master_list, sig);
break;
-
case SIGHUP:
do_hup_signal(master_list, time(NULL));
break;
+ case SIGABRT:
+ abort();
+ break;
+
+ case SIGSEGV:
+ abort();
+ break;
+
default:
logerr("got unexpected signal %d!", sig);
continue;
On Fri, Jun 19, 2009 at 12:06 PM, Jeff Moyer <[email protected]> wrote:
> Hi,
>
> Right now, the automount daemon blocks all signals. We should at least
> unblock those that will cause us to dump core. Otherwise, I think the
> behaviour could be, umm, interesting.
>
> I tested this by sending SIGBUS and SIGSEGV to the automount daemon.
>
> Cheers,
> Jeff
>
> Signed-off-by: Jeff Moyer <[email protected]>
>
> diff --git a/daemon/automount.c b/daemon/automount.c
> index 80691fa..04fa304 100644
> --- a/daemon/automount.c
> +++ b/daemon/automount.c
> @@ -1324,6 +1324,10 @@ static void *statemachine(void *arg)
> sigfillset(&signalset);
> sigdelset(&signalset, SIGCHLD);
> sigdelset(&signalset, SIGCONT);
> + sigdelset(&signalset, SIGBUS);
> + sigdelset(&signalset, SIGSEGV);
> + sigdelset(&signalset, SIGILL);
> + sigdelset(&signalset, SIGFPE);
>
> while (1) {
> sigwait(&signalset, &sig);
> @@ -1817,6 +1821,11 @@ int main(int argc, char *argv[])
> };
>
> sigfillset(&allsigs);
> + /* allow for the dropping of core files */
> + sigdelset(&allsigs, SIGBUS);
> + sigdelset(&allsigs, SIGSEGV);
> + sigdelset(&allsigs, SIGILL);
> + sigdelset(&allsigs, SIGFPE);
> sigprocmask(SIG_BLOCK, &allsigs, NULL);
>
> program = argv[0];
>
> _______________________________________________
> autofs mailing list
> [email protected]
> http://linux.kernel.org/mailman/listinfo/autofs
>
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