| Summary: | [Qt] There are parallel GC related crashes regularly | ||||||
|---|---|---|---|---|---|---|---|
| Product: | WebKit | Reporter: | Csaba Osztrogonác <ossy> | ||||
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> | ||||
| Status: | RESOLVED FIXED | ||||||
| Severity: | Critical | CC: | allan.jensen, fpizlo, ggaren, kadam, ossy, pvarga, rafael.lobo, yong.li.webkit, zan, zarvai, zherczeg | ||||
| Priority: | P1 | Keywords: | Gtk, InRadar, LayoutTestFailure, Qt, QtTriaged | ||||
| Version: | 528+ (Nightly build) | ||||||
| Hardware: | All | ||||||
| OS: | All | ||||||
| Bug Depends on: | 116854, 116855 | ||||||
| Bug Blocks: | 79668 | ||||||
| Attachments: |
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Description
Csaba Osztrogonác
2012-07-11 02:11:10 PDT
fast/js/random-array-gc-stress.html crashed on Qt 4.8, 64 bit, release, r122291: --------------------------------------------------------------------------------- crash log for DumpRenderTree (pid 390): STDOUT: <empty> STDERR: 1 0x421b68 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x421b68] STDERR: 2 0x7f5746781ff0 /lib/libpthread.so.0(+0xeff0) [0x7f5746781ff0] STDERR: 3 0x7f574d486f62 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11CopiedSpace19tryAllocateSlowCaseEmPPv+0xe2) [0x7f574d486f62] STDERR: 4 0x7f574d656b79 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC7JSArray14finishCreationERNS_12JSGlobalDataEj+0x79) [0x7f574d656b79] STDERR: 5 0x7f574d4dc58b /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(+0x1e9d58b) [0x7f574d4dc58b] STDERR: 6 0x7f5700c96a7b [0x7f5700c96a7b] fast/js/non-object-proto.html crashed on Qt 4.8, 64 bit, release, r122237: --------------------------------------------------------------------------------- crash log for DumpRenderTree (pid 2341): STDOUT: <empty> STDERR: 1 0x421cb8 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x421cb8] STDERR: 2 0x7ff22d477ff0 /lib/libpthread.so.0(+0xeff0) [0x7ff22d477ff0] STDERR: 3 0x7ff23418b9fc /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC15MarkedAllocator13allocateBlockEv+0x9c) [0x7ff23418b9fc] STDERR: 4 0x7ff23418bdf5 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC15MarkedAllocator16allocateSlowCaseEv+0xd5) [0x7ff23418bdf5] STDERR: 5 0x7ff233e2216e /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14JSHTMLDocument15createPrototypeEPN3JSC9ExecStateEPNS1_14JSGlobalObjectE+0xde) [0x7ff233e2216e] STDERR: 6 0x7ff233107beb /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore4toJSEPN3JSC9ExecStateEPNS_17JSDOMGlobalObjectEPNS_8DocumentE+0x63b) [0x7ff233107beb] STDERR: 7 0x7ff233135ebe /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore13createWrapperEPN3JSC9ExecStateEPNS_17JSDOMGlobalObjectEPNS_4NodeE+0x18e) [0x7ff233135ebe] STDERR: 8 0x7ff2330fa4ce /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore15JSDOMWindowBase14updateDocumentEv+0x34e) [0x7ff2330fa4ce] STDERR: 9 0x7ff23314ce3f /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore16ScriptController14updateDocumentEv+0xaf) [0x7ff23314ce3f] STDERR: 10 0x7ff2336e6612 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore5Frame11setDocumentEN3WTF10PassRefPtrINS_8DocumentEEE+0x72) [0x7ff2336e6612] STDERR: 11 0x7ff23363cc0c /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14DocumentWriter5beginERKNS_4KURLEbPNS_8DocumentE+0x17c) [0x7ff23363cc0c] STDERR: 12 0x7ff233635f88 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14DocumentLoader10commitDataEPKcm+0x58) [0x7ff233635f88] STDERR: 13 0x7ff23302e2b6 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore19FrameLoaderClientQt13committedLoadEPNS_14DocumentLoaderEPKci+0x156) [0x7ff23302e2b6] STDERR: 14 0x7ff23363246d /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14DocumentLoader10commitLoadEPKci+0x5d) [0x7ff23363246d] STDERR: 15 0x7ff233677f31 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14ResourceLoader14didReceiveDataEPKcixb+0x41) [0x7ff233677f31] STDERR: 16 0x7ff233663ad5 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore18MainResourceLoader14didReceiveDataEPKcixb+0x65) [0x7ff233663ad5] STDERR: 17 0x7ff233677c35 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore14ResourceLoader14didReceiveDataEPNS_14ResourceHandleEPKcii+0xb5) [0x7ff233677c35] STDERR: 18 0x7ff2339d9588 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore20QNetworkReplyHandler11forwardDataEv+0x78) [0x7ff2339d9588] STDERR: 19 0x7ff2339d9bd9 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore29QNetworkReplyHandlerCallQueue5flushEv+0x59) [0x7ff2339d9bd9] STDERR: 20 0x7ff2339da390 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore20QNetworkReplyWrapper19emitMetaDataChangedEv+0xd0) [0x7ff2339da390] STDERR: 21 0x7ff2339db9d8 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore20QNetworkReplyWrapper15receiveMetaDataEv+0x228) [0x7ff2339db9d8] STDERR: 22 0x7ff22dab7b76 /usr/local/Trolltech/Qt-4.8.0/lib/libQtCore.so.4(_ZN11QMetaObject8activateEP7QObjectPKS_iPPv+0x326) [0x7ff22dab7b76] STDERR: 23 0x7ff22dab37fe /usr/local/Trolltech/Qt-4.8.0/lib/libQtCore.so.4(_ZN7QObject5eventEP6QEvent+0x38e) [0x7ff22dab37fe] STDERR: 24 0x7ff22e36f19c /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4(_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0xac) [0x7ff22e36f19c] STDERR: 25 0x7ff22e37606d /usr/local/Trolltech/Qt-4.8.0/lib/libQtGui.so.4(_ZN12QApplication6notifyEP7QObjectP6QEvent+0x13d) [0x7ff22e37606d] STDERR: 26 0x7ff22daa10ec /usr/local/Trolltech/Qt-4.8.0/lib/libQtCore.so.4(_ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent+0x8c) [0x7ff22daa10ec] STDERR: 27 0x7ff22daa5953 /usr/local/Trolltech/Qt-4.8.0/lib/libQtCore.so.4(_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x3d3) [0x7ff22daa5953] STDERR: 28 0x7ff22dad2623 /usr/local/Trolltech/Qt-4.8.0/lib/libQtCore.so.4(+0x1cc623) [0x7ff22dad2623] STDERR: 29 0x7ff22fced6f2 /lib/libglib-2.0.so.0(g_main_context_dispatch+0x1f2) [0x7ff22fced6f2] STDERR: 30 0x7ff22fcf1568 /lib/libglib-2.0.so.0(+0x42568) [0x7ff22fcf1568] STDERR: 31 0x7ff22fcf171c /lib/libglib-2.0.so.0(g_main_context_iteration+0x6c) [0x7ff22fcf171c] fast/js/nested-object-gc.html crashed on Qt 4.8, 64 bit, release, r122235 : ---------------------------------------------------------------------------- crash log for DumpRenderTree (pid 15154): STDOUT: <empty> STDERR: 1 0x421cb8 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x421cb8] STDERR: 2 0x7f7e17aa8ff0 /lib/libpthread.so.0(+0xeff0) [0x7f7e17aa8ff0] STDERR: 3 0x7f7e1e7bc9fc /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC15MarkedAllocator13allocateBlockEv+0x9c) [0x7f7e1e7bc9fc] STDERR: 4 0x7f7e1e7bcdf5 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC15MarkedAllocator16allocateSlowCaseEv+0xd5) [0x7f7e1e7bcdf5] STDERR: 5 0x7f7e1e80118a /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(+0x1e9b18a) [0x7f7e1e80118a] STDERR: 6 0x7f7dd1f7ef70 [0x7f7dd1f7ef70] fast/css/webkit-keyframes-crash.html crashed on Qt 4.8, 64 bit, release, r122168 : ------------------------------------------------------------------------------- crash log for DumpRenderTree (pid 19555): STDOUT: <empty> STDERR: 1 0x421e68 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x421e68] STDERR: 2 0x7f4e2897aff0 /lib/libpthread.so.0(+0xeff0) [0x7f4e2897aff0] STDERR: 3 0x7f4e2f68a4d7 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor12startCopyingEv+0xb7) [0x7f4e2f68a4d7] STDERR: 4 0x7f4e2f68a855 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor16allocateNewSpaceEPvm+0x245) [0x7f4e2f68a855] STDERR: 5 0x7f4e2f68a8d0 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0x30) [0x7f4e2f68a8d0] STDERR: 6 0x7f4e2f86f5fd /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0xcd) [0x7f4e2f86f5fd] STDERR: 7 0x7f4e2f689d71 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xb1) [0x7f4e2f689d71] STDERR: 8 0x7f4e2f68a0b4 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor15drainFromSharedENS0_15SharedDrainModeE+0x124) [0x7f4e2f68a0b4] STDERR: 9 0x7f4e2f68b03b /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData17markingThreadMainEPNS_11SlotVisitorE+0x1b) [0x7f4e2f68b03b] STDERR: 10 0x7f4e2f916cd5 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(+0x20decd5) [0x7f4e2f916cd5] STDERR: 11 0x7f4e289728ca /lib/libpthread.so.0(+0x68ca) [0x7f4e289728ca] STDERR: 12 0x7f4e279e092d /lib/libc.so.6(clone+0x6d) [0x7f4e279e092d] sputnik/Conformance/15_Native_Objects/15.1_The_Global_Object/15.1.3/15.1.3.1_decodeURI/S15.1.3.1_A1.10_T1.html crashed on Qt 4.8, 64 bit, debug, r122302: crash log for DumpRenderTree (pid 19377): STDOUT: <empty> STDERR: ASSERTION FAILED: !(hash & m_hashAndFlags) STDERR: /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/Source/WTF/wtf/text/StringImpl.h(421) : void WTF::StringImpl::setHash(unsigned int) const STDERR: 1 0x7f65da4423a4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl7setHashEj+0x160) [0x7f65da4423a4] STDERR: 2 0x7f65dbe93d23 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl12hashSlowCaseEv+0x45) [0x7f65dbe93d23] STDERR: 3 0x7f65da4424e4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl4hashEv+0x36) [0x7f65da4424e4] STDERR: 4 0x7f65da442ebd /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF10StringHash4hashEPNS_10StringImplE+0x18) [0x7f65da442ebd] STDERR: 5 0x7f65dbbe5d68 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF17HashMapTranslatorINS_18HashMapValueTraitsINS_10HashTraitsIPNS_10StringImplEEENS2_IN3JSC7JSValueEEEEENS_10StringHashEE4hashIS4_EEjRKT_+0x1b) [0x7f65dbbe5d68] STDERR: 6 0x7f65dbbe582e /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF9HashTableIPNS_10StringImplESt4pairIS2_N3JSC7JSValueEENS_18PairFirstExtractorIS6_EENS_10StringHashENS_18HashMapValueTraitsINS_10HashTraitsIS2_EENSB_IS5_EEEESC_E3addINS_17HashMapTranslatorISE_S9_EES2_S5_EENS_18HashTableAddResultINS_17HashTableIteratorIS2_S6_S8_S9_SE_SC_EEEERKT0_RKT1_+0xec) [0x7f65dbbe582e] STDERR: 7 0x7f65dbbe5055 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE9inlineAddERKS2_RKS4_+0x2f) [0x7f65dbbe5055] STDERR: 8 0x7f65dbbe4993 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE3addERKS2_RKS4_+0x2f) [0x7f65dbbe4993] STDERR: 9 0x7f65dbbe4510 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC9MarkStack14internalAppendEPNS_7JSValueE+0x180) [0x7f65dbbe4510] STDERR: 10 0x7f65dbbe37bf /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0xcb) [0x7f65dbbe37bf] STDERR: 11 0x7f65dbde72c0 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x18a) [0x7f65dbde72c0] STDERR: 12 0x7f65dbe0f1f3 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC22NativeErrorConstructor13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x147) [0x7f65dbe0f1f3] STDERR: 13 0x7f65dbbe2c07 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x36f2c07) [0x7f65dbbe2c07] STDERR: 14 0x7f65dbbe2db5 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xa3) [0x7f65dbbe2db5] STDERR: 15 0x7f65dbbe3344 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor15drainFromSharedENS0_15SharedDrainModeE+0x4de) [0x7f65dbbe3344] STDERR: 16 0x7f65dbbe1c6c /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData17markingThreadMainEPNS_11SlotVisitorE+0x3c) [0x7f65dbbe1c6c] STDERR: 17 0x7f65dbbe1ceb /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData22markingThreadStartFuncEPv+0x2f) [0x7f65dbbe1ceb] STDERR: 18 0x7f65dbe84551 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x3994551) [0x7f65dbe84551] STDERR: 19 0x7f65dbe9bb2b /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x39abb2b) [0x7f65dbe9bb2b] STDERR: 20 0x7f65d362a8ca /lib/libpthread.so.0(+0x68ca) [0x7f65d362a8ca] STDERR: 21 0x7f65d269892d /lib/libc.so.6(clone+0x6d) [0x7f65d269892d] sputnik/Conformance/15_Native_Objects/15.1_The_Global_Object/15.1.3/15.1.3.2_decodeURIComponent/S15.1.3.2_A1.12_T1.html crashed on Qt 4.8, 64 bit, debug, r122302: crash log for DumpRenderTree (pid 25414): STDOUT: <empty> STDERR: ASSERTION FAILED: !hasHash() STDERR: /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/Source/WTF/wtf/text/StringImpl.h(415) : void WTF::StringImpl::setHash(unsigned int) const STDERR: 1 0x7f4d3139d287 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl7setHashEj+0x43) [0x7f4d3139d287] STDERR: 2 0x7f4d32deed23 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl12hashSlowCaseEv+0x45) [0x7f4d32deed23] STDERR: 3 0x7f4d3139d4e4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl4hashEv+0x36) [0x7f4d3139d4e4] STDERR: 4 0x7f4d3139debd /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF10StringHash4hashEPNS_10StringImplE+0x18) [0x7f4d3139debd] STDERR: 5 0x7f4d32b40d68 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF17HashMapTranslatorINS_18HashMapValueTraitsINS_10HashTraitsIPNS_10StringImplEEENS2_IN3JSC7JSValueEEEEENS_10StringHashEE4hashIS4_EEjRKT_+0x1b) [0x7f4d32b40d68] STDERR: 6 0x7f4d32b4082e /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF9HashTableIPNS_10StringImplESt4pairIS2_N3JSC7JSValueEENS_18PairFirstExtractorIS6_EENS_10StringHashENS_18HashMapValueTraitsINS_10HashTraitsIS2_EENSB_IS5_EEEESC_E3addINS_17HashMapTranslatorISE_S9_EES2_S5_EENS_18HashTableAddResultINS_17HashTableIteratorIS2_S6_S8_S9_SE_SC_EEEERKT0_RKT1_+0xec) [0x7f4d32b4082e] STDERR: 7 0x7f4d32b40055 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE9inlineAddERKS2_RKS4_+0x2f) [0x7f4d32b40055] STDERR: 8 0x7f4d32b3f993 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE3addERKS2_RKS4_+0x2f) [0x7f4d32b3f993] STDERR: 9 0x7f4d32b3f510 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC9MarkStack14internalAppendEPNS_7JSValueE+0x180) [0x7f4d32b3f510] STDERR: 10 0x7f4d32b3e7bf /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0xcb) [0x7f4d32b3e7bf] STDERR: 11 0x7f4d32d422c0 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x18a) [0x7f4d32d422c0] STDERR: 12 0x7f4d32d6a1f3 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC22NativeErrorConstructor13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x147) [0x7f4d32d6a1f3] STDERR: 13 0x7f4d32b3dc07 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x36f2c07) [0x7f4d32b3dc07] STDERR: 14 0x7f4d32b3ddb5 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xa3) [0x7f4d32b3ddb5] STDERR: 15 0x7f4d32b3e344 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor15drainFromSharedENS0_15SharedDrainModeE+0x4de) [0x7f4d32b3e344] STDERR: 16 0x7f4d32b3cc6c /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData17markingThreadMainEPNS_11SlotVisitorE+0x3c) [0x7f4d32b3cc6c] STDERR: 17 0x7f4d32b3cceb /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData22markingThreadStartFuncEPv+0x2f) [0x7f4d32b3cceb] STDERR: 18 0x7f4d32ddf551 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x3994551) [0x7f4d32ddf551] STDERR: 19 0x7f4d32df6b2b /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x39abb2b) [0x7f4d32df6b2b] STDERR: 20 0x7f4d2a5858ca /lib/libpthread.so.0(+0x68ca) [0x7f4d2a5858ca] STDERR: 21 0x7f4d295f392d /lib/libc.so.6(clone+0x6d) [0x7f4d295f392d] sputnik/Conformance/15_Native_Objects/15.1_The_Global_Object/15.1.3/15.1.3.1_decodeURI/S15.1.3.1_A1.12_T1.html crashed on Qt 4.8, 64 bit debug, r122220: crash log for DumpRenderTree (pid 4858): STDOUT: <empty> STDERR: ASSERTION FAILED: !hasHash() STDERR: /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/Source/WTF/wtf/text/StringImpl.h(415) : void WTF::StringImpl::setHash(unsigned int) const STDERR: 1 0x7f1b2ee92cb7 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl7setHashEj+0x43) [0x7f1b2ee92cb7] STDERR: 2 0x7f1b308e10d3 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl12hashSlowCaseEv+0x45) [0x7f1b308e10d3] STDERR: 3 0x7f1b2ee92f14 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl4hashEv+0x36) [0x7f1b2ee92f14] STDERR: 4 0x7f1b2ee938ed /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF10StringHash4hashEPNS_10StringImplE+0x18) [0x7f1b2ee938ed] STDERR: 5 0x7f1b30633118 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF17HashMapTranslatorINS_18HashMapValueTraitsINS_10HashTraitsIPNS_10StringImplEEENS2_IN3JSC7JSValueEEEEENS_10StringHashEE4hashIS4_EEjRKT_+0x1b) [0x7f1b30633118] STDERR: 6 0x7f1b30632bde /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF9HashTableIPNS_10StringImplESt4pairIS2_N3JSC7JSValueEENS_18PairFirstExtractorIS6_EENS_10StringHashENS_18HashMapValueTraitsINS_10HashTraitsIS2_EENSB_IS5_EEEESC_E3addINS_17HashMapTranslatorISE_S9_EES2_S5_EENS_18HashTableAddResultINS_17HashTableIteratorIS2_S6_S8_S9_SE_SC_EEEERKT0_RKT1_+0xec) [0x7f1b30632bde] STDERR: 7 0x7f1b30632405 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE9inlineAddERKS2_RKS4_+0x2f) [0x7f1b30632405] STDERR: 8 0x7f1b30631d43 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE3addERKS2_RKS4_+0x2f) [0x7f1b30631d43] STDERR: 9 0x7f1b306318c0 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC9MarkStack14internalAppendEPNS_7JSValueE+0x180) [0x7f1b306318c0] STDERR: 10 0x7f1b30630b6f /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0xcb) [0x7f1b30630b6f] STDERR: 11 0x7f1b30834670 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x18a) [0x7f1b30834670] STDERR: 12 0x7f1b3085c5a3 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC22NativeErrorConstructor13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x147) [0x7f1b3085c5a3] STDERR: 13 0x7f1b3062ffb7 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x36ecfb7) [0x7f1b3062ffb7] STDERR: 14 0x7f1b30630165 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xa3) [0x7f1b30630165] STDERR: 15 0x7f1b306306f4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor15drainFromSharedENS0_15SharedDrainModeE+0x4de) [0x7f1b306306f4] STDERR: 16 0x7f1b3062f01c /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData17markingThreadMainEPNS_11SlotVisitorE+0x3c) [0x7f1b3062f01c] STDERR: 17 0x7f1b3062f09b /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData22markingThreadStartFuncEPv+0x2f) [0x7f1b3062f09b] STDERR: 18 0x7f1b308d1901 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x398e901) [0x7f1b308d1901] STDERR: 19 0x7f1b308e8edb /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x39a5edb) [0x7f1b308e8edb] STDERR: 20 0x7f1b2807d8ca /lib/libpthread.so.0(+0x68ca) [0x7f1b2807d8ca] STDERR: 21 0x7f1b270eb92d /lib/libc.so.6(clone+0x6d) [0x7f1b270eb92d] sputnik/Conformance/07_Lexical_Conventions/7.3_Line_Terminators/S7.3_A3.1_T2.html crashed on Qt 4.8, 64 bit, debug, r122060: crash log for DumpRenderTree (pid 29850): STDOUT: <empty> STDERR: ASSERTION FAILED: !hasHash() STDERR: /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/Source/WTF/wtf/text/StringImpl.h(415) : void WTF::StringImpl::setHash(unsigned int) const STDERR: 1 0x7fa7bc30cf47 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl7setHashEj+0x43) [0x7fa7bc30cf47] STDERR: 2 0x7fa7bdd5451b /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl12hashSlowCaseEv+0x45) [0x7fa7bdd5451b] STDERR: 3 0x7fa7bc30d1a4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZNK3WTF10StringImpl4hashEv+0x36) [0x7fa7bc30d1a4] STDERR: 4 0x7fa7bc30db7d /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF10StringHash4hashEPNS_10StringImplE+0x18) [0x7fa7bc30db7d] STDERR: 5 0x7fa7bdaa7d1c /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF17HashMapTranslatorINS_18HashMapValueTraitsINS_10HashTraitsIPNS_10StringImplEEENS2_IN3JSC7JSValueEEEEENS_10StringHashEE4hashIS4_EEjRKT_+0x1b) [0x7fa7bdaa7d1c] STDERR: 6 0x7fa7bdaa77e2 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF9HashTableIPNS_10StringImplESt4pairIS2_N3JSC7JSValueEENS_18PairFirstExtractorIS6_EENS_10StringHashENS_18HashMapValueTraitsINS_10HashTraitsIS2_EENSB_IS5_EEEESC_E3addINS_17HashMapTranslatorISE_S9_EES2_S5_EENS_18HashTableAddResultINS_17HashTableIteratorIS2_S6_S8_S9_SE_SC_EEEERKT0_RKT1_+0xec) [0x7fa7bdaa77e2] STDERR: 7 0x7fa7bdaa7009 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE9inlineAddERKS2_RKS4_+0x2f) [0x7fa7bdaa7009] STDERR: 8 0x7fa7bdaa6947 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3WTF7HashMapIPNS_10StringImplEN3JSC7JSValueENS_10StringHashENS_10HashTraitsIS2_EENS6_IS4_EEE3addERKS2_RKS4_+0x2f) [0x7fa7bdaa6947] STDERR: 9 0x7fa7bdaa64c4 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC9MarkStack14internalAppendEPNS_7JSValueE+0x180) [0x7fa7bdaa64c4] STDERR: 10 0x7fa7bdaa5773 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0xcb) [0x7fa7bdaa5773] STDERR: 11 0x7fa7bdca7ab0 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0x18a) [0x7fa7bdca7ab0] STDERR: 12 0x7fa7bdaa4bbb /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x36dbbbb) [0x7fa7bdaa4bbb] STDERR: 13 0x7fa7bdaa4d69 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xa3) [0x7fa7bdaa4d69] STDERR: 14 0x7fa7bdaa52f8 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor15drainFromSharedENS0_15SharedDrainModeE+0x4de) [0x7fa7bdaa52f8] STDERR: 15 0x7fa7bdaa3c20 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData17markingThreadMainEPNS_11SlotVisitorE+0x3c) [0x7fa7bdaa3c20] STDERR: 16 0x7fa7bdaa3c9f /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(_ZN3JSC25MarkStackThreadSharedData22markingThreadStartFuncEPv+0x2f) [0x7fa7bdaa3c9f] STDERR: 17 0x7fa7bdd44d49 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x397bd49) [0x7fa7bdd44d49] STDERR: 18 0x7fa7bdd5c323 /home/webkitbuildbot/slaves/debug64bit/buildslave/qt-linux-64-debug/build/WebKitBuild/Debug/lib/libQtWebKit.so.4(+0x3993323) [0x7fa7bdd5c323] STDERR: 19 0x7fa7b55038ca /lib/libpthread.so.0(+0x68ca) [0x7fa7b55038ca] STDERR: 20 0x7fa7b457192d /lib/libc.so.6(clone+0x6d) [0x7fa7b457192d] One more crash on Qt 4.8, 64 bit, release, r122325 : crash log for DumpRenderTree (pid 28470): STDOUT: <empty> STDERR: 1 0x421b68 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x421b68] STDERR: 2 0x7fa7792deff0 /lib/libpthread.so.0(+0xeff0) [0x7fa7792deff0] STDERR: 3 0x7fa77fff3207 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor12startCopyingEv+0xb7) [0x7fa77fff3207] STDERR: 4 0x7fa77fff3585 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor16allocateNewSpaceEPvm+0x245) [0x7fa77fff3585] STDERR: 5 0x7fa77fff3600 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor13copyAndAppendEPPvmPNS_7JSValueEj+0x30) [0x7fa77fff3600] STDERR: 6 0x7fa7801d832d /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC8JSObject13visitChildrenEPNS_6JSCellERNS_11SlotVisitorE+0xcd) [0x7fa7801d832d] STDERR: 7 0x7fa77fff2aa1 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC11SlotVisitor5drainEv+0xb1) [0x7fa77fff2aa1] STDERR: 8 0x7fa77ffeef9b /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC4Heap9markRootsEb+0x2eb) [0x7fa77ffeef9b] STDERR: 9 0x7fa77ffef38b /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC4Heap7collectENS0_11SweepToggleE+0x6b) [0x7fa77ffef38b] STDERR: 10 0x7fa77ef473a7 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN7WebCore12GCController17garbageCollectNowEv+0x37) [0x7fa77ef473a7] STDERR: 11 0x425713 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/bin/DumpRenderTree() [0x425713] STDERR: 12 0x7fa77eff9ef6 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(_ZN3JSC8Bindings19QtRuntimeMetaMethod4callEPNS_9ExecStateE+0xe76) [0x7fa77eff9ef6] STDERR: 13 0x7fa7800e7d18 /ramdisk/qt-linux-64-release/build/WebKitBuild/Release/lib/libQtWebKit.so.4(+0x1f4bd18) [0x7fa7800e7d18] STDERR: 14 0x7fa7337ac1cc [0x7fa7337ac1cc] I managed to reproduce this bug inside gdb (Qt 4.8, 64bit, release mode with debug symbols) I don't know anything about GC, so I can't debug it. But I hope this backtrace can help you: $ gdb WebKitBuild/Release/bin/DumpRenderTree GNU gdb (GDB) 7.0.1-debian Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /home/oszi/WebKit/WebKitBuild/Release/bin/DumpRenderTree...done. (gdb) run --no-timeout PerformanceTests/Dromaeo/jslib-event-jquery.html Starting program: /home/oszi/WebKit/WebKitBuild/Release/bin/DumpRenderTree --no-timeout PerformanceTests/Dromaeo/jslib-event-jquery.html [Thread debugging using libthread_db enabled] [New Thread 0x7fffeb154700 (LWP 15118)] [New Thread 0x7fffa9889700 (LWP 15119)] [Thread 0x7fffa9889700 (LWP 15119) exited] [New Thread 0x7fffa9889700 (LWP 15120)] [New Thread 0x7fffa947e700 (LWP 15121)] [New Thread 0x7fffa927d700 (LWP 15122)] [New Thread 0x7fffa907c700 (LWP 15123)] [New Thread 0x7fffa8e7b700 (LWP 15124)] [New Thread 0x7fffa8c7a700 (LWP 15125)] [New Thread 0x7fffa8a79700 (LWP 15126)] [New Thread 0x7fffa839f700 (LWP 15127)] main frame - has 1 onunload handler(s) frame "<!--framePath //<!--frame0-->-->" - has 1 onunload handler(s) Program received signal SIGSEGV, Segmentation fault. JSC::MarkStackSegmentAllocator::shrinkReserve (this=0x7fffa293b000) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:89 89 segments = segments->m_previous; (gdb) bt #0 JSC::MarkStackSegmentAllocator::shrinkReserve (this=0x7fffa293b000) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:89 #1 0x00007ffff72a139d in JSC::MarkStackThreadSharedData::reset (this=0x7fffeaeb9b98) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:297 #2 0x00007ffff729ddd6 in JSC::Heap::markRoots (this=<value optimized out>, fullGC=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.cpp:595 #3 0x00007ffff729df8b in JSC::Heap::collect (this=0x7fffeaeb9050, sweepToggle=JSC::Heap::DoNotSweep) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.cpp:717 #4 0x00007ffff7292d80 in JSC::CopiedSpace::allocateBlock (this=0x7fffeaeb9a38, bytes=12240, outPtr=0x7fffffffd100) at /home/oszi/WebKit/Source/JavaScriptCore/heap/CopiedSpaceInlineMethods.h:104 #5 JSC::CopiedSpace::tryAllocateSlowCase (this=0x7fffeaeb9a38, bytes=12240, outPtr=0x7fffffffd100) at /home/oszi/WebKit/Source/JavaScriptCore/heap/CopiedSpace.cpp:72 #6 0x00007ffff7293310 in JSC::CopiedSpace::tryAllocate (this=0x1000, ptr=0x7fffffffd150, oldSize=8160, newSize=140737134697192) at /home/oszi/WebKit/Source/JavaScriptCore/heap/CopiedSpaceInlineMethods.h:124 #7 JSC::CopiedSpace::tryReallocate (this=0x1000, ptr=0x7fffffffd150, oldSize=8160, newSize=140737134697192) at /home/oszi/WebKit/Source/JavaScriptCore/heap/CopiedSpace.cpp:123 #8 0x00007ffff746244d in JSC::Heap::tryReallocateStorage (this=0x7fffa0afea80, globalData=<value optimized out>, newLength=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.h:378 #9 JSC::JSArray::increaseVectorLength (this=0x7fffa0afea80, globalData=<value optimized out>, newLength=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSArray.cpp:1046 #10 0x00007ffff7466203 in JSC::JSArray::putDirectIndexBeyondVectorLength (this=0x7fffa0afea80, exec=0x7fffa845a450, i=1017, value=..., shouldThrow=true) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSArray.cpp:868 #11 0x00007ffff7439e66 in JSC::JSArray::putDirectIndex (exec=0x7fffa845a450) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSArray.h:183 #12 arrayProtoFuncSlice (exec=0x7fffa845a450) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/ArrayPrototype.cpp:614 #13 0x00007fffaae4b265 in ?? () #14 0x00007fffa2aabc80 in ?? () #15 0x00007fffaaf9738e in ?? () #16 0x0000000000000000 in ?? () (gdb) One more, but different backtrace for Dromaeo/jslib-event-jquery.html test: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fffa9288700 (LWP 15511)] JSC::MarkStackArray::donateSomeCellsTo (this=0x4d4c90, other=...) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:175 175 previous = current->m_previous; (gdb) bt #0 JSC::MarkStackArray::donateSomeCellsTo (this=0x4d4c90, other=...) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:175 #1 0x00007ffff72a158b in JSC::SlotVisitor::donateKnownParallel (this=0x4d4c90) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:390 #2 0x00007ffff72a16b6 in JSC::SlotVisitor::drain (this=0x4d4c90) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:406 #3 0x00007ffff72a19e4 in JSC::SlotVisitor::drainFromShared (this=0x4d4c90, sharedDrainMode=JSC::SlotVisitor::SlaveDrain) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:498 #4 0x00007ffff72a296b in JSC::MarkStackThreadSharedData::markingThreadMain (this=<value optimized out>, slotVisitor=0x4d4c90) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:245 #5 0x00007ffff752e625 in wtfThreadEntryPoint (param=<value optimized out>) at /home/oszi/WebKit/Source/WTF/wtf/ThreadingPthreads.cpp:162 #6 0x00007ffff05838ca in start_thread (arg=<value optimized out>) at pthread_create.c:300 #7 0x00007fffef5f192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 #8 0x0000000000000000 in ?? () (gdb) One more, but different backtrace for Dromaeo/jslib-event-jquery.html test:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff72a1671 in isJSString (this=0x7fffeaec0cd8) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSString.h:501
501 inline bool isJSString(JSValue v) { return v.isCell() && v.asCell()->classInfo() == &JSString::s_info; }
(gdb) bt
#0 0x00007ffff72a1671 in isJSString (this=0x7fffeaec0cd8) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSString.h:501
#1 visitChildren (this=0x7fffeaec0cd8) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:351
#2 JSC::SlotVisitor::drain (this=0x7fffeaec0cd8) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:405
#3 0x00007ffff72a19e4 in JSC::SlotVisitor::drainFromShared (this=0x7fffeaec0cd8, sharedDrainMode=JSC::SlotVisitor::MasterDrain) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkStack.cpp:498
#4 0x00007ffff729dd38 in JSC::Heap::markRoots (this=0x7fffeaec0050, fullGC=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.cpp:555
#5 0x00007ffff729df8b in JSC::Heap::collect (this=0x7fffeaec0050, sweepToggle=JSC::Heap::DoNotSweep) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.cpp:717
#6 0x00007ffff72a410c in JSC::MarkedAllocator::allocateSlowCase (this=0x7fffeaec0158) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkedAllocator.cpp:75
#7 0x00007ffff72e84ba in JSC::MarkedAllocator::allocate (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkedAllocator.h:77
#8 JSC::MarkedSpace::allocateWithDestructor (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/MarkedSpace.h:191
#9 JSC::Heap::allocateWithDestructor (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/heap/Heap.h:362
#10 allocateCell<JSC::JSFinalObject> (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSCell.h:340
#11 JSC::JSFinalObject::create (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSObject.h:439
#12 constructEmptyObject (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSObject.h:515
#13 constructEmptyObject (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSGlobalObject.h:431
#14 constructEmptyObject (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/runtime/JSGlobalObject.h:436
#15 operationNewObject (exec=<value optimized out>) at /home/oszi/WebKit/Source/JavaScriptCore/dfg/DFGOperations.cpp:305
#16 0x00007fffaaf8880d in ?? ()
#17 0x0000000000000000 in ?? ()
(In reply to comment #6) > I managed to reproduce this bug inside gdb (Qt 4.8, 64bit, release mode with debug symbols) You can easily build this configuration with the following command: Tools/Scripts/build-webkit QMAKE_CFLAGS+=-g QMAKE_CXXFLAGS+=-g Looks like various threads overwrites each other "segments".
void MarkStackArray::expand()
{
...
unsigned count = 0;
for (MarkStackSegment* current = m_topSegment->m_previous; current; current = current->m_previous)
count++;
if (count != m_numberOfPreviousSegments) {
printf("nums: %d %d\n", count, (int)m_numberOfPreviousSegments);
sleep(1);
count = 0;
for (MarkStackSegment* current = m_topSegment->m_previous; current; current = current->m_previous)
count++;
printf("nums: %d %d\n", count, (int)m_numberOfPreviousSegments);
}
}
It prints:
nums: 14 40
nums: 102 40
-> During the sleep(1), something overwrote the segment chain. And the length of the chain is not 40, which is expected.
I suspect this is not allowed.
Filip, Geoffrey any idea how this happen? According to gdb donateSomeCellsTo overwrites it: current->m_previous = other.m_topSegment->m_previous; Oh no, wrong line. other.m_topSegment->m_previous = current this one overwrites it Please help me to solve this issue, as I don't know how these segments should be handled. It seems two threads share the same segments. Is this possible in theory? How the GC handle these segements? Are they assigned to a specific thread? What should be the next step to debug this? (In reply to comment #10) > Looks like various threads overwrites each other "segments". > > void MarkStackArray::expand() > { > ... > > unsigned count = 0; > for (MarkStackSegment* current = m_topSegment->m_previous; current; current = current->m_previous) > count++; > if (count != m_numberOfPreviousSegments) { > printf("nums: %d %d\n", count, (int)m_numberOfPreviousSegments); > > sleep(1); > count = 0; > for (MarkStackSegment* current = m_topSegment->m_previous; current; current = current->m_previous) > count++; > printf("nums: %d %d\n", count, (int)m_numberOfPreviousSegments); > } > } > > It prints: > > nums: 14 40 > nums: 102 40 > > -> During the sleep(1), something overwrote the segment chain. And the length of the chain is not 40, which is expected. > > I suspect this is not allowed. First of all, can you confirm that the bug goes away if you disable parallel tracing? Second, the only segment that multiple threads are allowed to touch is the m_sharedMarkStack, and as far as I can tell, we always hold the m_markingLock when playing with that stack. I can't reproduce crashing of PerformanceTests/Dromaeo/jslib-event-jquery.html with paralel GC disabled, so it must be a paralel GC bug. Shouldn't we disable paralel GC on Qt until proper fix? (In reply to comment #16) > I can't reproduce crashing of PerformanceTests/Dromaeo/jslib-event-jquery.html with paralel GC disabled, so it must be a paralel GC bug. Shouldn't we disable paralel GC on Qt until proper fix? I think that's the right first step. I will investigate whether or not I can repro this on Mac. Created attachment 154290 [details]
Patch
disable parallel GC on Qt until proper fix
Comment on attachment 154290 [details] Patch Landed in https://trac.webkit.org/changeset/123590 Filip, you might figure out something from this:
This is the backtrace where the sleep(1) waits:
#0 JSC::MarkStackArray::expand (this=0x4b89a0)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:136
#1 0x00007ffff72a213c in JSC::MarkStackArray::append (this=0x4b89a0, ptr=<value optimized out>,
bytes=<value optimized out>, values=0x7fff8f7bd068, length=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.h:401
#2 JSC::MarkStack::internalAppend (this=0x4b89a0, ptr=<value optimized out>, bytes=<value optimized out>,
values=0x7fff8f7bd068, length=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/runtime/Structure.h:540
#3 JSC::MarkStack::internalAppend (this=0x4b89a0, ptr=<value optimized out>, bytes=<value optimized out>,
values=0x7fff8f7bd068, length=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.h:467
#4 JSC::MarkStack::append (this=0x4b89a0, ptr=<value optimized out>, bytes=<value optimized out>,
values=0x7fff8f7bd068, length=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.h:437
#5 JSC::SlotVisitor::copyAndAppend (this=0x4b89a0, ptr=<value optimized out>, bytes=<value optimized out>,
values=0x7fff8f7bd068, length=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:653
#6 0x00007ffff74653ee in JSC::JSArray::visitChildren (cell=0x7fff9f70c480, visitor=...)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/runtime/JSArray.cpp:1382
#7 0x00007ffff72a12f8 in visitChildren (this=0x4b89a0)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:378
#8 JSC::SlotVisitor::drain (this=0x4b89a0)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:421
#9 0x00007ffff72a15f4 in JSC::SlotVisitor::drainFromShared (this=0x4b89a0,
sharedDrainMode=JSC::SlotVisitor::SlaveDrain)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:514
#10 0x00007ffff72a257b in JSC::MarkStackThreadSharedData::markingThreadMain (this=<value optimized out>,
slotVisitor=0x4b89a0) at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:261
#11 0x00007ffff7531415 in wtfThreadEntryPoint (param=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/WTF/wtf/ThreadingPthreads.cpp:162
During the 1 second sleep, this function owerwrites the previous chain:
#0 JSC::MarkStackArray::donateSomeCellsTo (this=0x4b0130, other=...)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:194
#1 0x00007ffff72a119b in JSC::SlotVisitor::donateKnownParallel (this=0x4b0130)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:406
#2 0x00007ffff72a12c6 in JSC::SlotVisitor::drain (this=0x4b0130)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:422
#3 0x00007ffff72a15f4 in JSC::SlotVisitor::drainFromShared (this=0x4b0130,
sharedDrainMode=JSC::SlotVisitor::SlaveDrain)
at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:514
#4 0x00007ffff72a257b in JSC::MarkStackThreadSharedData::markingThreadMain (this=<value optimized out>,
slotVisitor=0x4b0130) at /home/hzoli/WebKit-git/WebKit-git/Source/JavaScriptCore/heap/MarkStack.cpp:261
#5 0x00007ffff7531415 in wtfThreadEntryPoint (param=<value optimized out>)
at /home/hzoli/WebKit-git/WebKit-git/Source/WTF/wtf/ThreadingPthreads.cpp:162
Filip, any thoughts? These crashes are also occurring on the 64-bit GTK build, but only the release configuration. Specifically, fast/js/random-array-gc-stress.html was spotted crashing occasionally[1]. Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. [1] - http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20webkit.org&tests=fast%2Fjs%2Frandom-array-gc-stress.html [2] - http://test262.ecmascript.org/ [3] - http://trac.webkit.org/log/trunk?rev=121895&stop_rev=121837 (In reply to comment #22) > These crashes are also occurring on the 64-bit GTK build, but only the release configuration. Specifically, fast/js/random-array-gc-stress.html was spotted crashing occasionally[1]. > > Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. > > [1] - http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20-%20webkit.org&tests=fast%2Fjs%2Frandom-array-gc-stress.html > [2] - http://test262.ecmascript.org/ > [3] - http://trac.webkit.org/log/trunk?rev=121895&stop_rev=121837 The bisecting amounted to nothing valuable, the crashes started occurring after the parallel GC was enabled for the GTK port in http://trac.webkit.org/changeset/121869. I thought this is something general. Actually I know what is happen, but I don't know what is the expected behaviour so I cannot fix it. I can prove with gdb that two threads share the same segment list, and overwrite the "previous" members in the same time. Btw, in release mode a lot of things happen differently because of the #if !ASSERT_DISABLED guards. Perhaps something is wrong with them?
I.e. what is the purpose of this member:
#if !ASSERT_DISABLED
size_t m_top;
#endif
MarkStackArray::donateSomeCellsTo always donates to the shared mark stack, so this can only happen if a marking thread and the shared mark stack end up pointing to the same MarkStackSegment. One way this could happen would be if there were a threading bug in the MarkStackSegmentAllocator. The occurrence of these crashes increased visibly on the GTK 64-bit Release builder in the last 12 hours or so, most probably inside this commit range: http://trac.webkit.org/log/?verbose=on&rev=133972&stop_rev=133955 (Revisions 133956 and 133971 seem most related.) http://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release?numbuilds=100 However, I haven't seen any crashing on other bots. I'll probably slowly start to add flaky crashing expectations for the tests. (In reply to comment #22) > Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. FWIW, I can now run test262 suite with ToT without crashes. The fast/js/random-array-gc-stress.html test is also not crashing on either of the builders. I am unable to trigger this in WebKit trunk compiled against Qt 5.1. I find it possible that whatever underlying bug triggered this problem in the first place might have been solved. (In reply to comment #30) > I am unable to trigger this in WebKit trunk compiled against Qt 5.1. I find it possible that whatever underlying bug triggered this problem in the first place might have been solved. I would say this bug have been fixed by bug #99641. (In reply to comment #29) > (In reply to comment #22) > > Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. > > FWIW, I can now run test262 suite with ToT without crashes. > The fast/js/random-array-gc-stress.html test is also not crashing on either of the builders. Still stands, so I think this bug is OK to close. (In reply to comment #32) > (In reply to comment #29) > > (In reply to comment #22) > > > Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. > > > > FWIW, I can now run test262 suite with ToT without crashes. > > The fast/js/random-array-gc-stress.html test is also not crashing on either of the builders. > > Still stands, so I think this bug is OK to close. That makes sense. The PARALLEL_GC should be reenabled for Qt before closing the bug. (In reply to comment #33) > (In reply to comment #32) > > (In reply to comment #29) > > > (In reply to comment #22) > > > > Furthermore, I can reproduce these crashes consistently when running the test262 suite[2]. I'm now doing a bisect with each step being marked good or bad depending on the crashes occurring when running test262. At the moment the offending commit list is narrowed down between r121837 and r121895. > > > > > > FWIW, I can now run test262 suite with ToT without crashes. > > > The fast/js/random-array-gc-stress.html test is also not crashing on either of the builders. > > > > Still stands, so I think this bug is OK to close. > > That makes sense. The PARALLEL_GC should be reenabled for Qt before closing the bug. Zoltán or Ádám, could you reenable parallel GC on Qt and then check if it is bug still valid or not? I have landed the patch in r150751. Now there are two test fail with crash after this patch. I reported them in bug 116854 and bug 116855. The problem has been fixed. Close the bug. |