From 3e56ac4b377a3f39f040556beffb7c58cc2baea4 Mon Sep 17 00:00:00 2001
From: Yehuda Sadeh <yehuda@hq.newdream.net>
Date: Tue, 5 Oct 2010 12:04:07 -0700
Subject: [PATCH] dump backtrace when getting sigsegv and sigabrt

---
 src/config.cc | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/config.cc b/src/config.cc
index c2c028e5c8f9c..0d9c8d802fb74 100644
--- a/src/config.cc
+++ b/src/config.cc
@@ -19,6 +19,7 @@
 
 #include "common/Clock.h"
 #include "common/Logger.h"
+#include "common/BackTrace.h"
 
 #include <fstream>
 #include <stdlib.h>
@@ -210,6 +211,25 @@ void sighup_handler(int signum)
   logger_reopen_all();
 }
 
+static void (*old_sigsegv_handler)(int);
+static void (*old_sigabrt_handler)(int);
+
+void sigsegv_handler(int signum)
+{
+  BackTrace bt(0);
+  bt.print(*_dout);
+
+  old_sigsegv_handler(signum);
+}
+
+void sigabrt_handler(int signum)
+{
+  BackTrace bt(0);
+  bt.print(*_dout);
+
+  old_sigabrt_handler(signum);
+}
+
 #define _STR(x) #x
 #define STRINGIFY(x) _STR(x)
 
@@ -1177,6 +1197,8 @@ void parse_config_options(std::vector<const char*>& args)
   }
 
   signal(SIGHUP, sighup_handler);
+  old_sigsegv_handler = signal(SIGSEGV, sigsegv_handler);
+  old_sigabrt_handler = signal(SIGABRT, sigabrt_handler);
 
   args = nargs;
 }
-- 
2.39.5