From 87c77a8ef7a4478198e45d4b195fdfd41449ab7f Mon Sep 17 00:00:00 2001
From:  <dbaron@dbaron.org>
Date: Wed, 23 May 2007 08:55:36 -0700
Subject: [PATCH] Hook into glib's logging function so we can get stacks for
 glib assertions/warnings.  b=381133  r=bsmedberg

---
 xpfe/bootstrap/nsSigHandlers.cpp | 38 ++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/xpfe/bootstrap/nsSigHandlers.cpp b/xpfe/bootstrap/nsSigHandlers.cpp
index 0affa7b08aea..54b5130c97fd 100644
--- a/xpfe/bootstrap/nsSigHandlers.cpp
+++ b/xpfe/bootstrap/nsSigHandlers.cpp
@@ -157,6 +157,31 @@ void beos_signal_handler(int signum) {
 }
 #endif
 
+#ifdef MOZ_WIDGET_GTK2
+
+#include <glib.h>
+
+static GLogFunc orig_log_func = NULL;
+
+extern "C" {
+static void
+my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
+                 const gchar *message, gpointer user_data);
+}
+
+/* static */ void
+my_glib_log_func(const gchar *log_domain, GLogLevelFlags log_level,
+                 const gchar *message, gpointer user_data)
+{
+  orig_log_func(log_domain, log_level, message, NULL);
+
+  if (log_level & (G_LOG_LEVEL_ERROR | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING)) {
+    NS_DebugBreak(NS_DEBUG_ASSERTION, message, "glib assertion", __FILE__, __LINE__);
+  }
+}
+
+#endif
+
 void InstallUnixSignalHandlers(const char *ProgramName)
 {
   PL_strncpy(_progname,ProgramName, (sizeof(_progname)-1) );
@@ -228,4 +253,17 @@ void InstallUnixSignalHandlers(const char *ProgramName)
 #ifdef XP_BEOS
 	signal(SIGTERM, beos_signal_handler);
 #endif
+
+#ifdef MOZ_WIDGET_GTK2
+  const char *assertString = PR_GetEnv("XPCOM_DEBUG_BREAK");
+  if (assertString &&
+      (!strcmp(assertString, "suspend") ||
+       !strcmp(assertString, "stack") ||
+       !strcmp(assertString, "abort") ||
+       !strcmp(assertString, "trap") ||
+       !strcmp(assertString, "break"))) {
+    // Override the default glib logging function so we get stacks for it too.
+    orig_log_func = g_log_set_default_handler(my_glib_log_func, NULL);
+  }
+#endif
 }