commit 4881a23ca8127768c212ba271ca6ec4fe8930893
author Matt Morehouse <mascasa@google.com> Wed Sep 20 22:53:08 2017 +0000
committer Matt Morehouse <mascasa@google.com> Wed Sep 20 22:53:08 2017 +0000
tree 1320adf7bb10b43aea4b807bfb768de544c02807
parent d44afff1b6ae85678c939a682e5f9df64536ef9a

[MSan] Disable sanitization for __sanitizer_dtor_callback.

Summary:
Eliminate unnecessary instrumentation at __sanitizer_dtor_callback
call sites.  Fixes https://github.com/google/sanitizers/issues/861.

Reviewers: eugenis, kcc

Reviewed By: eugenis

Subscribers: vitalybuka, llvm-commits, cfe-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D38063

llvm-svn: 313831

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index b7c6271..3b33ced 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -2588,6 +2588,7 @@
 
   void visitCallSite(CallSite CS) {
     Instruction &I = *CS.getInstruction();
+    if (I.getMetadata("nosanitize")) return;
     assert((CS.isCall() || CS.isInvoke()) && "Unknown type of CallSite");
     if (CS.isCall()) {
       CallInst *Call = cast<CallInst>(&I);