From c6b8be742d1197ad24f0d1735db36892a6b4c1aa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jes=C3=BAs=20Garc=C3=ADa=20S=C3=A1ez?= <jgarcia@zentyal.com>
Date: Tue, 4 Mar 2014 16:40:41 +0100
Subject: [PATCH] use execinfo.h to get backtrace

Really poor backtrace because it will only have the frames from oc side,
I don't know why callStackSymbols is returning null, compilation flags?
---
 OpenChange/MAPIStoreSOGo.m | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/OpenChange/MAPIStoreSOGo.m b/OpenChange/MAPIStoreSOGo.m
index dba78b5f1..97d1d7d7c 100644
--- a/OpenChange/MAPIStoreSOGo.m
+++ b/OpenChange/MAPIStoreSOGo.m
@@ -49,6 +49,7 @@
 
 #include <mapistore/mapistore.h>
 #include <mapistore/mapistore_errors.h>
+#include <execinfo.h>
 
 static Class MAPIStoreContextK = Nil;
 static BOOL leakDebugging = NO;
@@ -69,8 +70,18 @@ sogo_backend_unexpected_error()
 static enum mapistore_error
 sogo_backend_handle_objc_exception(NSException *e, const char *fn_name, const int line_no)
 {
-  NSLog(@"[SOGo: %s:%d] - EXCEPTION: %@, reason: %@, stackframe: %@",
+  NSLog(@"[SOGo: %s:%d] - EXCEPTION: %@, reason: %@, backtrace: %@",
         fn_name, line_no, e.name, e.reason, [e callStackSymbols]);
+  if (![e callStackSymbols])
+    {
+      void *frames[128];
+      int i, len = backtrace(frames, 128);
+      char **symbols = backtrace_symbols(frames, len);
+      NSLog(@"Backtrace using execinfo.h:");
+      for (i = 0; i < len; ++i)
+        NSLog(@"\t%s", symbols[i]);
+      free(symbols);
+    }
   if ([[e name] isEqual:@"NotImplementedException"])
     {
       return MAPISTORE_ERR_NOT_IMPLEMENTED;