From 6a2e20ad14ac2fa09ddd5a81a8324de57bbf680b Mon Sep 17 00:00:00 2001
From: perkj <perkj@webrtc.org>
Date: Wed, 30 Nov 2016 04:53:08 -0800
Subject: [PATCH] Make sure GetLastError on a PlatformThread return an error
 that is relevant to the thread.

BUG=none

Review-Url: https://codereview.webrtc.org/2541003002
Cr-Commit-Position: refs/heads/master@{#15328}
---
 webrtc/base/platform_thread.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/webrtc/base/platform_thread.cc b/webrtc/base/platform_thread.cc
index 286bee95f1..0b025f2af0 100644
--- a/webrtc/base/platform_thread.cc
+++ b/webrtc/base/platform_thread.cc
@@ -119,6 +119,11 @@ PlatformThread::~PlatformThread() {
 
 #if defined(WEBRTC_WIN)
 DWORD WINAPI PlatformThread::StartThread(void* param) {
+  // The GetLastError() function only returns valid results when it is called
+  // after a Win32 API function that returns a "failed" result. A crash dump
+  // contains the result from GetLastError() and to make sure it does not
+  // falsely report a Windows error we call SetLastError here.
+  ::SetLastError(ERROR_SUCCESS);
   static_cast<PlatformThread*>(param)->Run();
   return 0;
 }