On Fri, 2013-06-28 at 22:24 -0400, Dave Jones wrote:
> I've beem holding off on cutting a new release of trinity until I've nailed
> this one last bug[1].
>
> When it happens, the watchdog process is in Z state, and the child processes
> are all blocked on sockets (and no progress is made because the watchdog
> died).
>
> In the one case I've managed to catch a core from the watchdog, it makes no
> damn sense..
>
> Program terminated with signal 8, Arithmetic exception.
> #0 check_shm_sanity () at watchdog.c:47
> if (shm->running_childs == 0)
>
> what the hell does that even mean ?
>
> 'shm' is valid, shm->running_childs is '4'.
>
> Any ideas ?
You could add a SIGFPE handler and check whether it's coming from
another process or not.
Something like:
void sighandler(int signal, siginfo_t *siginfo, void *ucontext)
{
printf("Took signal %d\n", signal);
printf("Sent by process %d (uid %d)\n",
siginfo->si_pid, siginfo->si_uid);
}
struct sigaction sigfpe_action = {
.sa_sigaction = sighandler,
.sa_flags = SA_SIGINFO,
};
if (sigaction(SIGFPE, &sigfpe_action, NULL)) {
perror("sigaction");
return 1;
}
cheers
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