[PATCH weston v2] Added handler for SIGABRT

[Giulio Camuffo]

Awesome, thanks, this was badly needed. Looks good to me.

2013/3/27 Peter Maatman <blackwolf12333 at gmail.com>:
> ---
>  src/compositor.c | 29 ++++++++++++++++++-----------
>  1 file changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/src/compositor.c b/src/compositor.c
> index a2860fd..e750cbe 100644
> --- a/src/compositor.c
> +++ b/src/compositor.c
> @@ -3221,17 +3221,17 @@ print_backtrace(void)
>  #endif
>
>  static void
> -on_segv_signal(int s, siginfo_t *siginfo, void *context)
> +on_caught_signal(int s, siginfo_t *siginfo, void *context)
>  {
> -       /* This SIGSEGV handler will do a best-effort backtrace, and
> +       /* This signal handler will do a best-effort backtrace, and
>          * then call the backend restore function, which will switch
>          * back to the vt we launched from or ungrab X etc and then
>          * raise SIGTRAP.  If we run weston under gdb from X or a
> -        * different vt, and tell gdb "handle SIGSEGV nostop", this
> +        * different vt, and tell gdb "handle *s* nostop", this
>          * will allow weston to switch back to gdb on crash and then
> -        * gdb will catch the crash with SIGTRAP. */
> +        * gdb will catch the crash with SIGTRAP.*/
>
> -       weston_log("caught segv\n");
> +       weston_log("caught signal: %d\n", s);
>
>         print_backtrace();
>
> @@ -3240,7 +3240,6 @@ on_segv_signal(int s, siginfo_t *siginfo, void *context)
>         raise(SIGTRAP);
>  }
>
> -
>  static void *
>  load_module(const char *name, const char *entrypoint)
>  {
> @@ -3393,6 +3392,18 @@ usage(int error_code)
>         exit(error_code);
>  }
>
> +static void
> +catch_signals()
> +{
> +       struct sigaction action;
> +
> +       action.sa_flags = SA_SIGINFO | SA_RESETHAND;
> +       action.sa_sigaction = on_caught_signal;
> +       sigemptyset(&action.sa_mask);
> +       sigaction(SIGSEGV, &action, NULL);
> +       sigaction(SIGABRT, &action, NULL);
> +}
> +
>  int main(int argc, char *argv[])
>  {
>         int ret = EXIT_SUCCESS;
> @@ -3400,7 +3411,6 @@ int main(int argc, char *argv[])
>         struct weston_compositor *ec;
>         struct wl_event_source *signals[4];
>         struct wl_event_loop *loop;
> -       struct sigaction segv_action;
>         struct weston_compositor
>                 *(*backend_init)(struct wl_display *display,
>                                  int *argc, char *argv[], const char *config_file);
> @@ -3491,10 +3501,7 @@ int main(int argc, char *argv[])
>                 exit(EXIT_FAILURE);
>         }
>
> -       segv_action.sa_flags = SA_SIGINFO | SA_RESETHAND;
> -       segv_action.sa_sigaction = on_segv_signal;
> -       sigemptyset(&segv_action.sa_mask);
> -       sigaction(SIGSEGV, &segv_action, NULL);
> +       catch_signals();
>         segv_compositor = ec;
>
>         ec->option_idle_time = idle_time;
> --
> 1.8.2
>
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