164715 2016-11-14 10:35:49 -0800 REGRESSION (r208606?): LayoutTest fast/mediastream/enumerating-crash.html is a flaky crash 2016-11-20 20:38:57 -0800 1 1 1 Unclassified WebKit New Bugs Other Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=164798 InRadar P2 Normal --- 1 ryanhaddad eric.carlson cdumez commit-queue eric.carlson oldest_to_newest 1251024 0 ryanhaddad 2016-11-14 10:35:49 -0800 LayouTest fast/mediastream/enumerating-crash.html is a flaky crash https://build.webkit.org/results/Apple%20El%20Capitan%20Debug%20WK2%20(Tests)/r208684%20(9417)/results.html 1251033 1 ryanhaddad 2016-11-14 10:55:08 -0800 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x000000010adcd4f7 WTFCrash + 39 (Assertions.cpp:323) 1 com.apple.JavaScriptCore 0x000000010adcd519 WTFCrashWithSecurityImplication + 9 2 com.apple.WebKit 0x00000001067a8ecf WTF::match_constness<WebCore::ScriptExecutionContext, WebCore::Document>::type* WTF::downcast<WebCore::Document, WebCore::ScriptExecutionContext>(WebCore::ScriptExecutionContext*) + 79 (TypeCasts.h:89) 3 com.apple.WebKit 0x00000001067a826d WebCore::UserMediaRequest::document() const + 29 (UserMediaRequest.h:74) 4 com.apple.WebKit 0x00000001067a77c8 WebKit::UserMediaPermissionRequestManager::removeMediaRequestFromMaps(WebCore::UserMediaRequest&) + 56 (UserMediaPermissionRequestManager.cpp:126) 5 com.apple.WebKit 0x00000001067a777b WebKit::UserMediaPermissionRequestManager::cancelUserMediaRequest(WebCore::UserMediaRequest&) + 107 (UserMediaPermissionRequestManager.cpp:108) 6 com.apple.WebKit 0x0000000106cefe39 WebKit::WebUserMediaClient::cancelUserMediaAccessRequest(WebCore::UserMediaRequest&) + 41 (WebUserMediaClient.cpp:51) 7 com.apple.WebCore 0x000000010fe366a3 WebCore::UserMediaController::cancelUserMediaAccessRequest(WebCore::UserMediaRequest&) + 51 (UserMediaController.h:64) 8 com.apple.WebCore 0x000000010fe34386 WebCore::UserMediaRequest::contextDestroyed() + 70 (UserMediaRequest.cpp:235) 9 com.apple.WebCore 0x000000010f864450 WebCore::ScriptExecutionContext::~ScriptExecutionContext() + 144 (ScriptExecutionContext.cpp:127) 10 com.apple.WebCore 0x000000010db1ace0 WebCore::Document::~Document() + 8320 (Document.cpp:656) 11 com.apple.WebCore 0x000000010e074395 WebCore::HTMLDocument::~HTMLDocument() + 117 (HTMLDocument.cpp:93) 12 com.apple.WebCore 0x000000010e0743b5 WebCore::HTMLDocument::~HTMLDocument() + 21 (HTMLDocument.cpp:93) 13 com.apple.WebCore 0x000000010e074439 WebCore::HTMLDocument::~HTMLDocument() + 25 (HTMLDocument.cpp:92) 14 com.apple.WebCore 0x000000010db3d31d WebCore::Document::decrementReferencingNodeCount() + 189 (Document.h:324) 15 com.apple.WebCore 0x000000010f2721c1 WebCore::Node::~Node() + 737 (Node.cpp:310) 16 com.apple.WebCore 0x000000010d75ea49 WebCore::ContainerNode::~ContainerNode() + 105 (ContainerNode.cpp:156) 17 com.apple.WebCore 0x000000010dca876f WebCore::Element::~Element() + 495 (Element.cpp:203) 18 com.apple.WebCore 0x000000010facf7c7 WebCore::StyledElement::~StyledElement() + 87 (StyledElement.cpp:139) 19 com.apple.WebCore 0x000000010d583c35 WebCore::HTMLElement::~HTMLElement() + 21 (HTMLElement.h:38) 20 com.apple.WebCore 0x000000010e169265 WebCore::HTMLSpanElement::~HTMLSpanElement() + 21 (HTMLSpanElement.h:32) 21 com.apple.WebCore 0x000000010e1691c5 WebCore::HTMLSpanElement::~HTMLSpanElement() + 21 (HTMLSpanElement.h:32) 22 com.apple.WebCore 0x000000010e1691e9 WebCore::HTMLSpanElement::~HTMLSpanElement() + 25 (HTMLSpanElement.h:32) 23 com.apple.WebCore 0x000000010f27b94d WebCore::Node::removedLastRef() + 93 (Node.cpp:2327) 24 com.apple.WebCore 0x000000010d3fa8ae WebCore::Node::deref() + 382 (Node.h:724) 25 com.apple.WebCore 0x000000010f2747f5 WebCore::Node::derefEventTarget() + 21 (Node.cpp:750) 26 com.apple.WebCore 0x000000010db794d6 WebCore::EventTarget::deref() + 22 (EventTarget.h:65) 27 com.apple.WebCore 0x000000010dc444bd WTF::Ref<WebCore::EventTarget>::~Ref() + 45 (Ref.h:60) 28 com.apple.WebCore 0x000000010dc36805 WTF::Ref<WebCore::EventTarget>::~Ref() + 21 (Ref.h:60) 29 com.apple.WebCore 0x000000010e803dcc WebCore::JSDOMWrapper<WebCore::EventTarget>::~JSDOMWrapper() + 28 (JSDOMWrapper.h:76) 30 com.apple.WebCore 0x000000010e803da5 WebCore::JSEventTarget::~JSEventTarget() + 21 (JSEventTarget.h:30) 31 com.apple.WebCore 0x000000010e8037f5 WebCore::JSEventTarget::~JSEventTarget() + 21 (JSEventTarget.h:30) 32 com.apple.WebCore 0x000000010e801cbd WebCore::JSEventTarget::destroy(JSC::JSCell*) + 29 (JSEventTarget.cpp:197) 33 com.apple.JavaScriptCore 0x0000000109bbc12b JSC::JSCell::callDestructor(JSC::VM&) + 203 (JSCellInlines.h:291) 34 com.apple.JavaScriptCore 0x000000010a985942 JSC::FreeList JSC::MarkedBlock::Handle::specializedSweep<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepMode)0, (JSC::DestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)1, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1, (JSC::MarkedBlock::Handle::MarksMode)1>() + 306 (MarkedBlock.cpp:126) 35 com.apple.JavaScriptCore 0x000000010a984fe3 JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectMarksMode<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::MarkedBlock::Handle::SweepMode)0, (JSC::DestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)1, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1>() + 83 (MarkedBlock.cpp:230) 36 com.apple.JavaScriptCore 0x000000010a98431e JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectSweepMode<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::DestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)1, (JSC::MarkedBlock::Handle::NewlyAllocatedMode)1>(JSC::MarkedBlock::Handle::SweepMode) + 78 (MarkedBlock.cpp:222) 37 com.apple.JavaScriptCore 0x000000010a982cec JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectHasNewlyAllocated<(JSC::MarkedBlock::Handle::EmptyMode)1, (JSC::DestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)1>(JSC::MarkedBlock::Handle::SweepMode) + 92 (MarkedBlock.cpp:214) 38 com.apple.JavaScriptCore 0x000000010a982ba3 JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectEmptyMode<(JSC::DestructionMode)1, (JSC::MarkedBlock::Handle::ScribbleMode)1>(JSC::MarkedBlock::Handle::SweepMode) + 99 (MarkedBlock.cpp:206) 39 com.apple.JavaScriptCore 0x000000010a9822b4 JSC::FreeList JSC::MarkedBlock::Handle::sweepHelperSelectScribbleMode<(JSC::DestructionMode)1>(JSC::MarkedBlock::Handle::SweepMode) + 68 (MarkedBlock.cpp:189) 40 com.apple.JavaScriptCore 0x000000010a9810d5 JSC::MarkedBlock::Handle::sweep(JSC::MarkedBlock::Handle::SweepMode) + 341 (MarkedBlock.cpp:181) 41 com.apple.JavaScriptCore 0x000000010a5ebeeb JSC::IncrementalSweeper::sweepNextBlock() + 187 (IncrementalSweeper.cpp:87) 42 com.apple.JavaScriptCore 0x000000010a5ebdd2 JSC::IncrementalSweeper::doSweep(double) + 34 (IncrementalSweeper.cpp:60) 43 com.apple.JavaScriptCore 0x000000010a5ebda2 JSC::IncrementalSweeper::doWork() + 34 (IncrementalSweeper.cpp:56) 44 com.apple.JavaScriptCore 0x000000010a5e81e7 JSC::HeapTimer::timerDidFire(__CFRunLoopTimer*, void*) + 183 (HeapTimer.cpp:93) 45 com.apple.CoreFoundation 0x00007fff8997fb94 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20 46 com.apple.CoreFoundation 0x00007fff8997f823 __CFRunLoopDoTimer + 1075 47 com.apple.CoreFoundation 0x00007fff8997f37a __CFRunLoopDoTimers + 298 48 com.apple.CoreFoundation 0x00007fff89976871 __CFRunLoopRun + 1841 49 com.apple.CoreFoundation 0x00007fff89975ed8 CFRunLoopRunSpecific + 296 50 com.apple.HIToolbox 0x00007fff8b2be935 RunCurrentEventLoopInMode + 235 51 com.apple.HIToolbox 0x00007fff8b2be76f ReceiveNextEventCommon + 432 52 com.apple.HIToolbox 0x00007fff8b2be5af _BlockUntilNextEventMatchingListInModeWithFilter + 71 53 com.apple.AppKit 0x00007fff90186df6 _DPSNextEvent + 1067 54 com.apple.AppKit 0x00007fff90186226 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 55 com.apple.AppKit 0x00007fff9017ad80 -[NSApplication run] + 682 56 com.apple.AppKit 0x00007fff90144368 NSApplicationMain + 1176 57 libxpc.dylib 0x00007fff94c0c194 _xpc_objc_main + 795 58 libxpc.dylib 0x00007fff94c0abbe xpc_main + 494 59 com.apple.WebKit.WebContent 0x0000000106260080 main + 800 60 libdyld.dylib 0x00007fff824d65ad start + 1 1251123 2 ryanhaddad 2016-11-14 13:47:45 -0800 Related to http://trac.webkit.org/projects/webkit/changeset/208606? 1251355 3 294804 eric.carlson 2016-11-14 21:09:27 -0800 Created attachment 294804 Proposed patch. 1251426 4 294804 commit-queue 2016-11-15 04:27:14 -0800 Comment on attachment 294804 Proposed patch. Clearing flags on attachment: 294804 Committed r208730: <http://trac.webkit.org/changeset/208730> 1251427 5 commit-queue 2016-11-15 04:27:18 -0800 All reviewed patches have been landed. Closing bug. 1251671 6 ap 2016-11-15 15:15:11 -0800 This is still happening, just saw this crash with ToT. 1251672 7 ryanhaddad 2016-11-15 15:16:21 -0800 (In reply to comment #6) > This is still happening, just saw this crash with ToT. Seen with fast/regions/cssom/webkit-named-flow-event-target.html here: https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK2%20(Tests)/r208748%20(16238)/results.html 1251673 8 ap 2016-11-15 15:17:08 -0800 <rdar://problem/29277180> 1252568 9 295125 eric.carlson 2016-11-17 19:32:36 -0800 Created attachment 295125 Proposed patch. 1252713 10 295125 ap 2016-11-18 10:09:30 -0800 Comment on attachment 295125 Proposed patch. r=me. Looking at the code, I wonder if there is a mistake in ScriptExecutionContext here: virtual bool isDocument() const { return false; } virtual bool isWorkerGlobalScope() const { return false; } Don't we want to ASSERT_NOT_REACHED here, or just to leave it unimplemented? 1252719 11 cdumez 2016-11-18 10:15:50 -0800 (In reply to comment #10) > Comment on attachment 295125 [details] > Proposed patch. > > r=me. > > Looking at the code, I wonder if there is a mistake in > ScriptExecutionContext here: > > virtual bool isDocument() const { return false; } > virtual bool isWorkerGlobalScope() const { return false; } > > Don't we want to ASSERT_NOT_REACHED here, or just to leave it unimplemented? If you use ASSERT_NOT_REACHED() here or make them pure virtual then each subclass will have to overwrite both of this virtual functions. Currently, each subclass only has to override one of them, which is nice. This seems to be a common pattern in WebKit. I guess here you could make the argument that there are only 2 virtual functions and it is not a big deal to override all of them in each subclass. However, if you consider other base classes like Node or Element, this does not scale very well. 1253183 12 295125 commit-queue 2016-11-20 20:38:52 -0800 Comment on attachment 295125 Proposed patch. Clearing flags on attachment: 295125 Committed r208938: <http://trac.webkit.org/changeset/208938> 1253184 13 commit-queue 2016-11-20 20:38:57 -0800 All reviewed patches have been landed. Closing bug. 294804 2016-11-14 21:09:27 -0800 2016-11-15 04:27:14 -0800 Proposed patch. crash_fix_patch_1.txt text/plain 3170 eric.carlson SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDIwODY1OSkKKysrIFNvdXJjZS9XZWJDb3JlL0NoYW5n ZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDE4IEBACisyMDE2LTExLTE0ICBFcmljIENh cmxzb24gIDxlcmljLmNhcmxzb25AYXBwbGUuY29tPgorCisgICAgICAgIFJFR1JFU1NJT04gKHIy MDg2MDY/KTogTGF5b3V0VGVzdCBmYXN0L21lZGlhc3RyZWFtL2VudW1lcmF0aW5nLWNyYXNoLmh0 bWwgaXMgYSBmbGFreSBjcmFzaAorICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93 X2J1Zy5jZ2k/aWQ9MTY0NzE1CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISku CisKKyAgICAgICAgTm8gbmV3IHRlc3RzLCBmaXhlcyBhIGNyYXNoIGluIGFuIGV4aXN0aW5nIHRl c3QuCisKKyAgICAgICAgKiBNb2R1bGVzL21lZGlhc3RyZWFtL1VzZXJNZWRpYVJlcXVlc3QuY3Bw OgorICAgICAgICAoV2ViQ29yZTo6VXNlck1lZGlhUmVxdWVzdDo6ZG9jdW1lbnQpOiBSZXR1cm4g 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