Thread::Stop() must be called before any subclass's destructor completes.
Update Thread documentation, fix all subclasses that had a problem.
This is to avoid a data racing between the destructor modifying the vtable, and
Thread::PreRun calling virtual method Run at the same time.
For example:
[ RUN ] FileMediaEngineTest.TestGetCapabilities
==================
WARNING: ThreadSanitizer: data race on vptr (ctor/dtor vs virtual call) (pid=2967)
Read of size 8 at 0x7d480000bd00 by thread T1:
#0 talk_base::Thread::PreRun(void*) /mnt/data/b/build/slave/Linux_Tsan_v2/build/src/out/Release/../../talk/base/thread.cc:353 (libjingle_media_unittest+0x000000234da8)
Previous write of size 8 at 0x7d480000bd00 by main thread:
#0 talk_base::Thread::~Thread() /mnt/data/b/build/slave/Linux_Tsan_v2/build/src/out/Release/../../talk/base/thread.cc:158 (libjingle_media_unittest+0x00000023478c)
#1 ~RtpSenderReceiver /mnt/data/b/build/slave/Linux_Tsan_v2/build/src/out/Release/../../talk/media/base/filemediaengine.cc:122 (libjingle_media_unittest+0x0000001b551f)
...
RISK=P2
TESTED=try bots and tsan
BUG=2078,2080
R=fischman@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/2428004
git-svn-id: http://webrtc.googlecode.com/svn/trunk@4999 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/base/logging_unittest.cc b/talk/base/logging_unittest.cc
index b0c219f..53cab66 100644
--- a/talk/base/logging_unittest.cc
+++ b/talk/base/logging_unittest.cc
@@ -87,6 +87,12 @@
// Ensure we don't crash when adding/removing streams while threads are going.
// We should restore the correct global state at the end.
class LogThread : public Thread {
+ public:
+ virtual ~LogThread() {
+ Stop();
+ }
+
+ private:
void Run() {
// LS_SENSITIVE to avoid cluttering up any real logging going on
LOG(LS_SENSITIVE) << "LOG";