From: Koundinya Veluri <kouvel@users.noreply.github.com>
Date: Thu, 23 Aug 2018 05:13:28 +0000 (-0700)
Subject: Fix a PAL spin lock issue (#62)
X-Git-Tag: submit/tizen/20190813.035844~83
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c6779d1a49fc911f9c705744ecf77e9591e9701c;p=platform%2Fcore%2Fdotnet%2Fdiagnostics.git

Fix a PAL spin lock issue (#62)

Fix for https://github.com/dotnet/coreclr/issues/18486
- Lock release needs to be at least volatile

coreclr master PR: https://github.com/dotnet/coreclr/pull/19604
---

diff --git a/src/pal/src/thread/thread.cpp b/src/pal/src/thread/thread.cpp
index 175ff0ad6..663dd3573 100644
--- a/src/pal/src/thread/thread.cpp
+++ b/src/pal/src/thread/thread.cpp
@@ -458,7 +458,7 @@ void SPINLOCKAcquire (LONG * lock, unsigned int flags)
 
 void SPINLOCKRelease (LONG * lock)
 {
-    *lock = 0;
+    VolatileStore(lock, 0);
 }
 
 DWORD SPINLOCKTryAcquire (LONG * lock)