From 70296dde9a4237ec07adbffae2a4acf40fc8bf6a Mon Sep 17 00:00:00 2001
From: Fabio Bas <ctrlaltca@gmail.com>
Date: Sun, 19 Apr 2015 19:39:05 +0200
Subject: [PATCH] Simple stack trace for singla handler (unix only)

---
 servatrice/src/main.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/servatrice/src/main.cpp b/servatrice/src/main.cpp
index 6c29e8be..22048ca0 100644
--- a/servatrice/src/main.cpp
+++ b/servatrice/src/main.cpp
@@ -33,8 +33,12 @@
 #include <google/protobuf/stubs/common.h>
 #ifdef Q_OS_UNIX
 #include <signal.h>
+#include <execinfo.h>
+#include <unistd.h>
 #endif
 
+#define SIGSEGV_TRACE_LINES 40
+
 RNG_Abstract *rng;
 ServerLogger *logger;
 QThread *loggerThread;
@@ -129,6 +133,16 @@ void myMessageOutput2(QtMsgType /*type*/, const QMessageLogContext &, const QStr
 #ifdef Q_OS_UNIX
 void sigSegvHandler(int sig)
 {
+    void *array[SIGSEGV_TRACE_LINES];
+    size_t size;
+
+    // get void*'s for all entries on the stack
+    size = backtrace(array, SIGSEGV_TRACE_LINES);
+
+    // print out all the frames to stderr
+    fprintf(stderr, "Error: signal %d:\n", sig);
+    backtrace_symbols_fd(array, size, STDERR_FILENO);
+
 	if (sig == SIGSEGV)
 		logger->logMessage("CRASH: SIGSEGV");
 	else if (sig == SIGABRT)