[retro-gtk/wip/aplazas/reftests] backtrace on segfault

[Adrien Plazas <aplazas src gnome org>]

commit 083f91c1d4b21cc383c11bb9ac67468e2222cc96
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed Apr 25 13:58:41 2018 +0200

    backtrace on segfault

 tests/retro-reftest.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
---
diff --git a/tests/retro-reftest.c b/tests/retro-reftest.c
index d43ef31..63e4c1f 100644
--- a/tests/retro-reftest.c
+++ b/tests/retro-reftest.c
@@ -20,6 +20,8 @@
 
 #include "retro-reftest-file.h"
 
+#include <execinfo.h>
+
 typedef struct {
   guint refs;
   RetroCore *core;
@@ -492,6 +494,19 @@ retro_reftest_setup_for_file (GFile *file)
   g_signal_connect_swapped (data->core, "video-output", (GCallback) retro_reftest_on_video_output, data);
 }
 
+void
+on_sigsegv (int sig)
+{
+  gpointer array[10];
+  gint size;
+
+  size = backtrace (array, 10);
+
+  fprintf (stderr, "Error: signal %d:\n", sig);
+  backtrace_symbols_fd (array, size, STDERR_FILENO);
+  exit (1);
+}
+
 int
 main (int argc,
       gchar **argv)
@@ -500,6 +515,7 @@ main (int argc,
   gint i;
 
   g_setenv ("GDK_RENDERING", "image", FALSE);
+  signal(SIGSEGV, on_sigsegv);
 
   if (!parse_command_line (&argc, &argv))
     return 1;