From: Devang Patel <dpatel@apple.com>
Date: Wed, 9 Sep 2009 17:44:26 +0000 (+0000)
Subject: Take lock before removing a node from MDNodeSet.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=88cfd964a3341ad7c89dd5e176f24db1fef6f287;p=oota-llvm.git

Take lock before removing a node from MDNodeSet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81356 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/VMCore/Metadata.cpp b/lib/VMCore/Metadata.cpp
index 8e025b6d7a2..1163b4709ce 100644
--- a/lib/VMCore/Metadata.cpp
+++ b/lib/VMCore/Metadata.cpp
@@ -115,7 +115,11 @@ void MDNode::dropAllReferences() {
 }
 
 MDNode::~MDNode() {
-  getType()->getContext().pImpl->MDNodeSet.RemoveNode(this);
+  {
+    LLVMContextImpl *pImpl = getType()->getContext().pImpl;
+    sys::SmartScopedWriter<true> Writer(pImpl->ConstantsLock);
+    pImpl->MDNodeSet.RemoveNode(this);
+  }
   dropAllReferences();
 }