From add5ea661a315b1c6833cc1f3c7966ab74046e7f Mon Sep 17 00:00:00 2001
From: Yaron Keren <yaron.keren@gmail.com>
Date: Tue, 19 May 2015 13:31:25 +0000
Subject: [PATCH] Prevent Cleanup() from running more than once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237694 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/Windows/Signals.inc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Support/Windows/Signals.inc b/lib/Support/Windows/Signals.inc
index d81d3c8b90b..26c3c6e111a 100644
--- a/lib/Support/Windows/Signals.inc
+++ b/lib/Support/Windows/Signals.inc
@@ -441,6 +441,9 @@ void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
 }
 
 static void Cleanup() {
+  if (CleanupExecuted)
+    return;
+
   EnterCriticalSection(&CriticalSection);
 
   // Prevent other thread from registering new files and directories for
-- 
2.34.1