Patch forthcoming.
Created attachment 262474 [details] the patch
Comment on attachment 262474 [details] the patch View in context: https://bugs.webkit.org/attachment.cgi?id=262474&action=review r=me > Source/JavaScriptCore/dfg/DFGPlan.cpp:648 > + // NOTE: From here on, this method can return anything and still be sounds. It's sound to return "be sounds" => "be sound"
Created attachment 262481 [details] performance
Landed in http://trac.webkit.org/changeset/190599
This made many perf tests randomly crash, rolling out. https://build.webkit.org/builders/Apple%20Mavericks%20Release%20WK2%20(Perf)?numbuilds=50 Oct 05 21:15 190602 failure #5939 Failed 11 perf tests failed Oct 05 19:42 190599 failure #5938 Failed 10 perf tests failed Oct 05 17:23 190589 failure #5937 Failed 2 perf tests failed Oct 05 15:04 190579 success #5936 Build successful Oct 05 12:45 190567 failure #5935 Failed 1 perf tests failed Oct 05 10:20 190560 success #5934 Build successful https://build.webkit.org/builders/Apple%20Yosemite%20Release%20WK2%20(Perf)?numbuilds=50 Oct 05 21:19 190601 failure #3076 Failed 9 perf tests failed Oct 05 19:13 190597 failure #3075 Failed 1 perf tests failed Oct 05 17:01 190587 success #3074 Build successful https://build.webkit.org/builders/Apple%20El%20Capitan%20Release%20WK2%20(Perf)?numbuilds=50 Oct 05 21:15 190601 failure #47 Failed 7 perf tests failed Oct 05 19:15 190597 failure #46 Failed 1 perf tests failed Oct 05 17:08 190591 failure #45 Failed 1 perf tests failed Oct 05 14:58 190579 success #44 Build successful Thread 10 Crashed:: WTF Parallel Helper Thread 0 com.apple.JavaScriptCore 0x000000011122daca JSC::speculationFromCell(JSC::JSCell*) + 58 1 com.apple.JavaScriptCore 0x0000000110c52e72 JSC::CodeBlock::updateAllPredictionsAndCountLiveness(unsigned int&, unsigned int&) + 258 2 com.apple.JavaScriptCore 0x0000000110c4fa07 JSC::CodeBlock::stronglyVisitStrongReferences(JSC::SlotVisitor&) + 567 3 com.apple.JavaScriptCore 0x0000000110c4f786 JSC::CodeBlock::visitChildren(JSC::SlotVisitor&) + 342 4 com.apple.JavaScriptCore 0x0000000111229ff5 JSC::SlotVisitor::drain() + 277 5 com.apple.JavaScriptCore 0x000000011122a1f8 JSC::SlotVisitor::drainFromShared(JSC::SlotVisitor::SharedDrainMode) + 104 6 com.apple.JavaScriptCore 0x0000000110f2d86d WTF::SharedTaskFunctor<JSC::Heap::markRoots(double, void*, void*, int (&) [37])::$_0>::run() + 285 7 com.apple.JavaScriptCore 0x00000001112cd56c WTF::ParallelHelperClient::runTask(WTF::RefPtr<WTF::SharedTask>) + 44 8 com.apple.JavaScriptCore 0x00000001112cdd30 WTF::ParallelHelperPool::helperThreadBody() + 224 9 com.apple.JavaScriptCore 0x00000001112dd593 WTF::threadEntryPoint(void*) + 179 10 com.apple.JavaScriptCore 0x00000001112dd9cf WTF::wtfThreadEntryPoint(void*) + 15
Re-opened since this is blocked by bug 149836
Another stack trace from a bot; I'm not sure which is caused by this, and which by bug 149727. Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 com.apple.JavaScriptCore 0x0000000111c90cde WTFCrash + 62 1 com.apple.JavaScriptCore 0x000000011163a8ed JSC::CodeBlock::setOptimizationThresholdBasedOnCompilationResult(JSC::CompilationResult) + 877 2 com.apple.JavaScriptCore 0x00000001119e7c46 JSC::JITToDFGDeferredCompilationCallback::compilationDidComplete(JSC::CodeBlock*, JSC::CodeBlock*, JSC::CompilationResult) + 150 3 com.apple.JavaScriptCore 0x000000011186c4c1 JSC::DFG::Worklist::completeAllReadyPlansForVM(JSC::VM&, JSC::DFG::CompilationKey) + 257 4 com.apple.JavaScriptCore 0x00000001119c9757 operationOptimize + 727 5 ??? 0x000032e6adc4836e 0 + 55966339203950 6 ??? 0x000032e6adc15fc0 0 + 55966338998208 7 com.apple.JavaScriptCore 0x0000000111ae3f7c vmEntryToJavaScript + 299 8 com.apple.JavaScriptCore 0x00000001119aa9ae JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*) + 158 9 com.apple.JavaScriptCore 0x0000000111986e95 JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 453 10 com.apple.JavaScriptCore 0x000000011161b007 JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, WTF::NakedPtr<JSC::Exception>&) + 71 11 com.apple.WebCore 0x0000000112e58019 WebCore::ScheduledAction::executeFunctionInContext(JSC::JSGlobalObject*, JSC::JSValue, WebCore::ScriptExecutionContext&) + 537 (JSMainThreadExecState.h:93) 12 com.apple.WebCore 0x0000000112e57c5a WebCore::ScheduledAction::execute(WebCore::Document&) + 138 (ScheduledAction.cpp:125) 13 com.apple.WebCore 0x0000000112426cf9 WebCore::DOMTimer::fired() + 553 (InspectorInstrumentation.h:284)
This got fixed.