Bug 129792 – [Mac] Leak: dispatch_semaphore leak allocated in MediaPlayerPrivateAVFoundationObjC::waitForVideoOutputMediaDataWillChange

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Joseph Pecoraro]

Seen on the leaks bot:
<http://build.webkit.org/builders/Apple%20MountainLion%20%28Leaks%29/builds/9535/steps/layout-test/logs/stdio>

Leak: 0x7fb97b2a39b0  size=112  zone: DefaultMallocZone_0x100eb0000   OS_dispatch_semaphore  ObjC  libdispatch.dylib
	0x781082a8 0x00007fff 0x00000000 0x00000000 	...x............
	0x89abcdef 0xffffffff 0x78109d00 0x00007fff 	...........x....
	0x00000000 0x00000000 0x00000000 0x00000000 	................
	0x00000000 0x00000000 0x00000000 0x00000000 	................
	0x00000000 0x00000000 0x00000000 0x00000000 	................
	0x0000232b 0x00000000 0x00000000 0x00000000 	+#..............
	0x00000000 0x00000000 0x00000000 0x00000000 	................
	Call stack: [thread 0x7fff78de5180]: 
        | 0x2 
        | start 
        | main DumpRenderTreeMain.mm:30 
        | DumpRenderTreeMain(int, char const**) DumpRenderTree.mm:1277 
        | dumpRenderTree(int, char const**) DumpRenderTree.mm:1169 
        | runTestingServerLoop() DumpRenderTree.mm:1085 
        | runTest(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) DumpRenderTree.mm:1821 
        | CFRunLoopRunSpecific 
        | __CFRunLoopRun 
        | __CFRunLoopDoTimer 
        | __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ 
        | WebCore::timerFired(__CFRunLoopTimer*, void*) SharedTimerMac.mm:134 
        | WebCore::ThreadTimers::sharedTimerFired() ThreadTimers.cpp:108 
        | WebCore::ThreadTimers::sharedTimerFiredInternal() ThreadTimers.cpp:135 
        | WebCore::Timer<WebCore::GenericEventQueue>::fired() Timer.h:133 
        | std::__1::function<void ()>::operator()() const functional:1435 
        | std::__1::__function::__func<std::__1::__bind<void (WebCore::GenericEventQueue::*)(WebCore::Timer<WebCore::GenericEventQueue>&)&, WebCore::GenericEventQueue*&, std::__1::reference_wrapper<WebCore::Timer<WebCore::GenericEventQueue> > >, std::__1::allocator<std::__1::__bind<void (WebCore::GenericEventQueue::*)(WebCore::Timer<WebCore::GenericEventQueue>&)&, WebCore::GenericEventQueue*&, std::__1::reference_wrapper<WebCore::Timer<WebCore::GenericEventQueue> > > >, void ()>::operator()() functional:1059 
        | WebCore::GenericEventQueue::timerFired(WebCore::Timer<WebCore::GenericEventQueue>&) GenericEventQueue.cpp:72 
        | WebCore::Node::dispatchEvent(WTF::PassRefPtr<WebCore::Event>) Node.cpp:2028 
        | WebCore::EventDispatcher::dispatchEvent(WebCore::Node*, WTF::PassRefPtr<WebCore::Event>) EventDispatcher.cpp:326 
        | WebCore::dispatchEventInDOM(WebCore::Event&, WebCore::EventPath const&, WebCore::WindowEventContext&) EventDispatcher.cpp:271 
        | WebCore::EventContext::handleLocalEvents(WebCore::Event&) const EventContext.cpp:55 
        | WebCore::Node::handleLocalEvents(WebCore::Event&) Node.cpp:2014 
        | WebCore::EventTarget::fireEventListeners(WebCore::Event*) EventTarget.cpp:197 
        | WebCore::EventTarget::fireEventListeners(WebCore::Event*, WebCore::EventTargetData*, WTF::Vector<WebCore::RegisteredEventListener, 1ul, WTF::CrashOnOverflow>&) EventTarget.cpp:247 
        | WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) JSEventListener.cpp:126 
        | WebCore::JSMainThreadExecState::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) JSMainThreadExecState.h:55 
        | JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) CallData.cpp:39 
        | JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) Interpreter.cpp:994 
        | JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) JITCode.cpp:47 
        | callToJavaScript 
        | llint_op_call 
        | llint_op_call 
        | llint_op_call 
        | llint_op_call 
        | 0x5d028c80103a 
        | WebCore::jsWebGLRenderingContextPrototypeFunctionTexImage2D(JSC::ExecState*) JSWebGLRenderingContext.cpp:3313 
        | WebCore::jsWebGLRenderingContextPrototypeFunctionTexImage2D5(JSC::ExecState*) JSWebGLRenderingContext.cpp:3295 
        | WebCore::WebGLRenderingContext::texImage2D(unsigned int, int, unsigned int, unsigned int, unsigned int, WebCore::HTMLVideoElement*, int&) WebGLRenderingContext.cpp:3974 
        | WebCore::WebGLRenderingContext::videoFrameToImage(WebCore::HTMLVideoElement*, WebCore::BackingStoreCopy, int&) WebGLRenderingContext.cpp:3945 
        | WebCore::HTMLVideoElement::paintCurrentFrameInContext(WebCore::GraphicsContext*, WebCore::IntRect const&) HTMLVideoElement.cpp:256 
        | WebCore::MediaPlayer::setVisible(bool) MediaPlayer.cpp:738 
        | WebCore::MediaPlayerPrivateAVFoundation::setVisible(bool) MediaPlayerPrivateAVFoundation.cpp:593 
        | WebCore::MediaPlayerPrivateAVFoundation::setUpVideoRendering() MediaPlayerPrivateAVFoundation.cpp:139 
        | WebCore::MediaPlayerPrivateAVFoundationObjC::createContextVideoRenderer() MediaPlayerPrivateAVFoundationObjC.mm:434 
        | WebCore::MediaPlayerPrivateAVFoundationObjC::createVideoOutput() MediaPlayerPrivateAVFoundationObjC.mm:1424 
        | WebCore::MediaPlayerPrivateAVFoundationObjC::waitForVideoOutputMediaDataWillChange() MediaPlayerPrivateAVFoundationObjC.mm:1569 
        | dispatch_semaphore_create 
        | _os_object_alloc 
        | class_createInstance 
        | calloc 
        | malloc_zone_calloc 

Looks like it is not released in the destructor.

[Joseph Pecoraro]

Created attachment 225969 [details]
[PATCH] Proposed Fix

[WebKit Commit Bot]

Comment on attachment 225969 [details]
[PATCH] Proposed Fix

Clearing flags on attachment: 225969

Committed r165195: <http://trac.webkit.org/changeset/165195>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.