From 547f9dd4c0302fe9a571e1811a4a92dd82ef89f6 Mon Sep 17 00:00:00 2001
From: Kostya Serebryany <kcc@google.com>
Date: Fri, 18 Oct 2013 17:46:43 +0000
Subject: [asan] fix stack trace printing on Mac

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@192990 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/asan/asan_stack.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/asan/asan_stack.cc b/lib/asan/asan_stack.cc
index aec75818..cbc151cc 100644
--- a/lib/asan/asan_stack.cc
+++ b/lib/asan/asan_stack.cc
@@ -25,6 +25,10 @@ static bool MaybeCallAsanSymbolize(const void *pc, char *out_buffer,
 }
 
 void PrintStack(const uptr *trace, uptr size) {
+  if (!trace) {
+    Printf("<empty stack>\n");
+    return;
+  }
   StackTrace::PrintStack(trace, size, common_flags()->symbolize,
                          MaybeCallAsanSymbolize);
 }
-- 
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