From: Amir Ayupov <aaupov@fb.com>
Date: Thu, 10 Mar 2022 04:27:15 +0000 (-0800)
Subject: [BOLT][NFC] Fix print-cfg data race
X-Git-Tag: upstream/15.0.7~14065
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d1638cb0b5b24fc4895902721d622216d08fc186;p=platform%2Fupstream%2Fllvm.git

[BOLT][NFC] Fix print-cfg data race

Addresses ThreadSanitizer warning

Reviewed By: rafauler

Differential Revision: https://reviews.llvm.org/D121337
---

diff --git a/bolt/lib/Rewrite/RewriteInstance.cpp b/bolt/lib/Rewrite/RewriteInstance.cpp
index ea2cee1..b814862 100644
--- a/bolt/lib/Rewrite/RewriteInstance.cpp
+++ b/bolt/lib/Rewrite/RewriteInstance.cpp
@@ -2950,8 +2950,10 @@ void RewriteInstance::buildFunctionsCFG() {
         if (!BF.buildCFG(AllocId))
           return;
 
-        if (opts::PrintAll)
+        if (opts::PrintAll) {
+          auto L = BC->scopeLock();
           BF.print(outs(), "while building cfg", true);
+        }
       };
 
   ParallelUtilities::PredicateTy SkipPredicate = [&](const BinaryFunction &BF) {