173628 2017-06-20 17:27:31 -0700 [mac-wk1] requestAnimationFrame callbacks may not get serviced 2017-06-25 01:09:32 -0700 1 1 1 Unclassified WebKit Tools / Tests WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=173326 https://bugs.webkit.org/show_bug.cgi?id=173626 https://bugs.webkit.org/show_bug.cgi?id=173681 https://bugs.webkit.org/show_bug.cgi?id=173751 https://bugs.webkit.org/show_bug.cgi?id=173821 P2 Normal --- 1 graouts cdumez ap buildbot cdumez commit-queue dbates dino esprehn+autocc jonlee kangil.han lforschler simon.fraser oldest_to_newest 1321321 0 graouts 2017-06-20 17:27:31 -0700 As we found in https://bugs.webkit.org/show_bug.cgi?id=168409, and in other flaky tests, we have an issue where some media/modern-media-controls tests time out due to requestAnimationFrame callbacks not being serviced. We added some logging to identify when ScriptedAnimationController would get suspended in webkit.org/b/173326. This logging points to the fact that the reason rAF callbacks aren't serviced is because Document::requestAnimationFrame() suspends rAF when the page reports that scripted animations ought to be suspended, which is true when m_scriptedAnimationsSuspended is true. We are adding more logging to track this with https://bugs.webkit.org/show_bug.cgi?id=173626. This bug tracks the general issue until it is fixed. 1322186 1 graouts 2017-06-22 21:36:01 -0700 During https://build.webkit.org/builders/Apple%20El%20Capitan%20Release%20WK1%20(Tests)/builds/2788, media/modern-media-controls/airplay-button/airplay-button-on.html starts with ScriptedAnimationController suspended as Document::requestAnimationFrame() is called and page()->scriptedAnimationsSuspended() is true. For this worker and this Page instance, the last previous call to Page::suspendScriptedAnimations() is made while running fast/events/page-visibility-transition-test.html as a result of Page::setIsVisibleInternal(false) being called. Here's the backtrace: 1 0x109b848bf WebCore::Page::setActivityState(unsigned int) 2 0x10be0381c -[WebView(WebPrivate) _setVisibilityState:isInitialState:] 3 0x106613b45 setPageVisibilityCallback(OpaqueJSContext const*, OpaqueJSValue*, OpaqueJSValue*, unsigned long, OpaqueJSValue const* const*, OpaqueJSValue const**) 4 0x106e6e4dd long long JSC::APICallbackFunction::call<JSC::JSCallbackFunction>(JSC::ExecState*) 5 0x106fc0bb5 JSC::LLInt::setUpCall(JSC::ExecState*, JSC::Instruction*, JSC::CodeSpecializationKind, JSC::JSValue, JSC::LLIntCallLinkInfo*) 6 0x106fc8800 llint_entry 7 0x106fc880e llint_entry 8 0x106fc880e llint_entry 9 0x106fc1bbb vmEntryToJavaScript 10 0x106e1643f JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) 11 0x106ddb0e4 JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) 12 0x10699b2dd JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) 13 0x1096e5722 WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext*, WebCore::Event*) 14 0x10923f484 WebCore::EventTarget::fireEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener>, 1ul, WTF::CrashOnOverflow, 16ul>) 15 0x10923f11e WebCore::EventTarget::fireEventListeners(WebCore::Event&) 16 0x1091ba7b6 WebCore::DOMWindow::dispatchEvent(WebCore::Event&, WebCore::EventTarget*) 17 0x1091c1482 WebCore::DOMWindow::dispatchLoadEvent() 18 0x109161dc5 WebCore::Document::implicitClose() 19 0x1092dc76f WebCore::FrameLoader::checkCompleted() 20 0x1092db2c0 WebCore::FrameLoader::finishedParsing() 21 0x10916f69a WebCore::Document::finishedParsing() 22 0x1093a0c42 WebCore::HTMLDocumentParser::prepareToStopParsing() 23 0x1093a1cb3 WebCore::HTMLDocumentParser::finish() 24 0x1091a17da WebCore::DocumentWriter::end() 25 0x10918a1ec WebCore::DocumentLoader::finishedLoading() 26 0x108f6b6f9 WebCore::CachedResource::checkNotify() 27 0x108f675bc WebCore::CachedRawResource::finishLoading(WebCore::SharedBuffer*) 28 0x109f8485a WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) 29 0x109ddadd2 WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle*) 30 0x7fff9634a4a5 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke 31 0x7fff9634a3ba -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] 1322193 2 graouts 2017-06-22 22:18:38 -0700 I can finally reproduce this issue, or at least one reason it occurs: OpenSource > Tools/Scripts/run-webkit-tests --no-retry --no-sample-on-timeout --time-out-ms=5000 --release -1 --child-processes=1 --verbose fast/events/page-visibility-transition-test.html media/modern-media-controls/airplay-button/airplay-button-on.html 1322197 3 cdumez 2017-06-22 22:32:36 -0700 (In reply to Antoine Quint from comment #2) > I can finally reproduce this issue, or at least one reason it occurs: > > OpenSource > Tools/Scripts/run-webkit-tests --no-retry > --no-sample-on-timeout --time-out-ms=5000 --release -1 --child-processes=1 > --verbose fast/events/page-visibility-transition-test.html > media/modern-media-controls/airplay-button/airplay-button-on.html Interestingly, document.hidden return false when running the second test. So it *is* visible but somehow scripted animations are still suspended. 1322209 4 313693 cdumez 2017-06-22 23:42:58 -0700 Created attachment 313693 Patch 1322210 5 cdumez 2017-06-22 23:43:33 -0700 Found the bug! 1322295 6 313693 commit-queue 2017-06-23 08:44:33 -0700 Comment on attachment 313693 Patch Clearing flags on attachment: 313693 Committed r218747: <http://trac.webkit.org/changeset/218747> 1322296 7 commit-queue 2017-06-23 08:44:35 -0700 All reviewed patches have been landed. Closing bug. 1322677 8 graouts 2017-06-25 01:09:32 -0700 We're removing the logging code we added to diagnose this issue in https://bugs.webkit.org/show_bug.cgi?id=173821. 313693 2017-06-22 23:42:58 -0700 2017-06-23 08:44:33 -0700 Patch bug-173628-20170622234257.patch text/plain 8336 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjE4NzI0CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggNjEyYmVlZDBjMmRmYjFh ZmQzYzg1NGVkNDc5ODFlYzVhY2I3ODE2ZS4uMTEzNjUxOThkMTRjNDVmNmUwMjdjYzVhY2E4OTk5 NzVmY2M1OGJiNCAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDM1IEBACisyMDE3LTA2LTIyICBDaHJp cyBEdW1leiAgPGNkdW1lekBhcHBsZS5jb20+CisKKyAgICAgICAgW21hYy13azFdIHJlcXVlc3RB bmltYXRpb25GcmFtZSBjYWxsYmFja3MgbWF5IG5vdCBnZXQgc2VydmljZWQKKyAgICAgICAgaHR0 cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE3MzYyOAorCisgICAgICAgIFJl dmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIFBhZ2U6OnNldElzVmlzaWJsZUlu 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