# HG changeset patch
# User nkeynes
# Date 1194435953 0
# Node ID 4db4702b07785fc7d92232ae989622993ab6bc7d
# Parent  67c133a17400ccd0d19f94b4e8424ad78865d4aa
Add crash handler to get a backtrace via gdb

--- a/src/dream.h	Tue Nov 06 12:23:25 2007 +0000
+++ b/src/dream.h	Wed Nov 07 11:45:53 2007 +0000
@@ -1,5 +1,5 @@
 /**
- * $Id: dream.h,v 1.16 2007-10-31 09:10:23 nkeynes Exp $
+ * $Id: dream.h,v 1.17 2007-11-07 11:45:53 nkeynes Exp $
  *
  * Miscellaneous application-wide declarations (mainly logging atm)
  *
@@ -95,6 +95,8 @@
 void fwrite_dump32( unsigned int *buf, unsigned int length, FILE *f );
 void fwrite_dump32v( unsigned int *buf, unsigned int length, int wordsPerLine, FILE *f );
 
+void install_crash_handler(void);
+
 gboolean write_png_to_stream( FILE *f, frame_buffer_t );
 frame_buffer_t read_png_from_stream( FILE *f );
 
--- a/src/main.c	Tue Nov 06 12:23:25 2007 +0000
+++ b/src/main.c	Wed Nov 07 11:45:53 2007 +0000
@@ -1,5 +1,5 @@
 /**
- * $Id: main.c,v 1.34 2007-10-31 11:53:35 nkeynes Exp $
+ * $Id: main.c,v 1.35 2007-11-07 11:45:53 nkeynes Exp $
  *
  * Main program, initializes dreamcast and gui, then passes control off to
  * the gtk main loop (currently). 
@@ -64,6 +64,8 @@
 {
     int opt, i;
     double t;
+
+    install_crash_handler();
 #ifdef ENABLE_NLS
     bindtextdomain (PACKAGE, PACKAGE_LOCALE_DIR);
     textdomain (PACKAGE);
--- a/src/util.c	Tue Nov 06 12:23:25 2007 +0000
+++ b/src/util.c	Wed Nov 07 11:45:53 2007 +0000
@@ -1,5 +1,5 @@
 /**
- * $Id: util.c,v 1.12 2007-10-31 12:05:23 nkeynes Exp $
+ * $Id: util.c,v 1.13 2007-11-07 11:45:53 nkeynes Exp $
  *
  * Miscellaneous utility functions.
  *
@@ -16,11 +16,14 @@
  * GNU General Public License for more details.
  */
 
+#define HAVE_EXECINFO_H 1
+
 #include <assert.h>
 #include <ctype.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <signal.h>
 #include <time.h>
 #include <zlib.h>
 #include <glib.h>
@@ -31,7 +34,30 @@
 #include "sh4/sh4core.h"
 
 char *msg_levels[] = { "FATAL", "ERROR", "WARN", "INFO", "DEBUG", "TRACE" };
-int global_msg_level = EMIT_WARN;
+int global_msg_level = EMIT_INFO;
+
+static void report_crash( int signo, siginfo_t *info, void *ptr )
+{
+    char buf[128];
+
+    fprintf( stderr, "--- Aborting with signal %d ---\n", signo );
+    // Get gdb to print a nice backtrace for us
+    snprintf( buf, 128, "gdb -batch -f --quiet --pid=%d -ex bt", getpid() );
+    system(buf);
+
+    abort();
+}
+
+void install_crash_handler(void)
+{
+    struct sigaction sa;
+
+    sa.sa_sigaction = report_crash;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = SA_RESETHAND|SA_SIGINFO;
+    sigaction( SIGSEGV, &sa, NULL );
+}
+
 
 void fwrite_string( const char *s, FILE *f )
 {