232019 2021-10-20 09:30:44 -0700 We should watch isHavingABadTime if we read from the structureCache 2021-10-22 11:19:00 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 justin_michaud justin_michaud bfulgham ews-feeder justin_michaud saam webkit-bug-importer ysuzuki oldest_to_newest 1806658 0 justin_michaud 2021-10-20 09:30:44 -0700 rdar://84338462 We should watch isHavingABadTime if we read from the structureCache off the mutator thread 1806662 1 441889 justin_michaud 2021-10-20 09:45:46 -0700 Created attachment 441889 Patch 1806712 2 441889 ysuzuki 2021-10-20 11:19:47 -0700 Comment on attachment 441889 Patch r=me 1806738 3 441889 ysuzuki 2021-10-20 11:44:49 -0700 Comment on attachment 441889 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=441889&action=review > Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:3131 > + if (!globalObject->isHavingABadTime()) I think you need to insert load-load-fence just after this. So, bool isHavingABadTime = globalObject->isHavingABadTime(); WTF::loadLoadFence(); if (!isHavingABadTime) m_graph.watchpoints().addLazily(globalObject->havingABadTimeWatchpoint()); > Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp:846 > + if (!globalObject->isHavingABadTime()) Ditto 1806822 4 441931 justin_michaud 2021-10-20 14:08:50 -0700 Created attachment 441931 Patch 1806872 5 ews-feeder 2021-10-20 15:08:52 -0700 Committed r284576 (243316@main): <https://commits.webkit.org/243316@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 441931. 1807778 6 441931 saam 2021-10-22 11:19:00 -0700 Comment on attachment 441931 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=441931&action=review > Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:3138 > + WTF::loadLoadFence(); Why do we have 2 load load fences? > Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h:3140 > + structure = m_vm.structureCache > + .emptyObjectStructureConcurrently(globalObject, base.getObject(), JSFinalObject::defaultInlineCapacity()); this should not be on multiple lines. > Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp:855 > + structure = globalObject->vm().structureCache > + .emptyObjectStructureConcurrently(globalObject, base.getObject(), JSFinalObject::defaultInlineCapacity()); ditto, not 2 lines. If you really like putting things on 2 lines, you should do it for the arguments, not the "." 441889 2021-10-20 09:45:46 -0700 2021-10-20 14:08:48 -0700 Patch bug-232019-20211020094546.patch text/plain 7614 justin_michaud U3VidmVyc2lvbiBSZXZpc2lvbjogMjg0NDY0CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCAy Mzk4NzdjOGI2MWI4Zjg4NmMxODhkYTA2ZmY0NWE4ODM4MzBlZWJkLi45ZGNjOTBjOWFlYWQ0YTI1 M2Y1NDFhOTVmMTM1ZWZiODhiOTFiNTYyIDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwyNCBAQAorMjAyMS0xMC0yMCAgSnVzdGluIE1pY2hhdWQgIDxqdXN0aW5fbWljaGF1ZEBh cHBsZS5jb20+CisKKyAgICAgICAgV2Ugc2hvdWxkIHdhdGNoIGlzSGF2aW5nQUJhZFRpbWUgaWYg d2UgcmVhZCBmcm9tIHRoZSBzdHJ1Y3R1cmVDYWNoZQorICAgICAgICBodHRwczovL2J1Z3Mud2Vi a2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjMyMDE5CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9C T0RZIChPT1BTISkuCisKKyAgICAgICAgV2Ugc2hvdWxkIGxvY2sgdGhlIHN0cnVjdHVyZSBjYWNo 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