Bug 299967

Summary:	REGRESSION(300594@main): [ macOS Debug ] TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap is a constant crash
Product:	WebKit	Reporter:	Dawn Morningstar <Morningstar>
Component:	New Bugs	Assignee:	Ben Nham <nham>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	nham, sihui_liu, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Dawn Morningstar

Reported 2025-10-01 10:48:34 PDT

TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap Is a constantly crashing api-test after 300594@main https://commits.webkit.org/300594@main This is reproducible with run-api-tests --root <Path to spade> TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap I locally bisected this to 300594@main, it passes at 300593@main HISTORY: https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap TEST-RUN: https://build.webkit.org/#/builders/1226/builds/2384 STDIO: https://s3-us-west-2.amazonaws.com/archives.webkit.org/mac-sequoia-x86_64%20arm64-debug-run-api-tests/300596@main-2384.txt CRASH: TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap 16:38:53.883 16386 2025-09-26 16:03:26.885 TestWebKitAPI[24742:4715767] NSEventConcurrentProcessingEnabled=NO 16:38:53.883 16386 ASSERTION FAILED: m_table 16:38:53.883 16386 /Volumes/Data/worker/Apple-Sequoia-Debug-Build/build/WebKitBuild/Debug/usr/local/include/wtf/HashTable.h(237) : void WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>::checkValidity(const const_iterator &) const [HashTable = WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>, Key = WTF::Ref<WTF::DefaultWeakPtrImpl>, Value = WTF::Ref<WTF::DefaultWeakPtrImpl>, Extractor = WTF::IdentityExtractor, HashFunctions = WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, Traits = WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, KeyTraits = WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>] 16:38:53.883 16386 1 0x14b3e8b7c WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>>::checkValidity(WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>> const&) const 16:38:53.883 16386 2 0x14b3e8b00 WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>>::operator==(WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>> const&) const 16:38:53.883 16386 3 0x14b3e7f2c bool WTF::operator==<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>(WTF::HashTableConstIteratorAdapter<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>> const&, WTF::HashTableConstIteratorAdapter<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>> const&) 16:38:53.883 16386 4 0x14d483318 WTF::WeakHashSet<WebKit::WebProcessProxy, WTF::DefaultWeakPtrImpl, (WTF::EnableWeakPtrThreadingAssertions)1>::WeakHashSetConstIterator::operator++() 16:38:53.883 16386 5 0x14d71efe0 WebKit::WebProcessPool::handleMemoryPressureWarning(WTF::Critical) 16:38:53.883 16386 6 0x14d7ed42c WebKit::installMemoryPressureHandler()::$_0::operator()(WTF::Critical, WTF::Synchronous) const 16:38:53.883 16386 7 0x14d7ed368 WTF::Detail::CallableWrapper<WebKit::installMemoryPressureHandler()::$_0, void, WTF::Critical, WTF::Synchronous>::call(WTF::Critical, WTF::Synchronous) 16:38:53.883 16386 8 0x116452870 WTF::Function<void (WTF::Critical, WTF::Synchronous)>::operator()(WTF::Critical, WTF::Synchronous) const 16:38:53.883 16386 9 0x116451df0 WTF::MemoryPressureHandler::releaseMemory(WTF::Critical, WTF::Synchronous) 16:38:53.883 16386 10 0x116459600 WTF::MemoryPressureHandler::respondToMemoryPressure(WTF::Critical, WTF::Synchronous) 16:38:53.883 16386 11 0x116452704 WTF::MemoryPressureHandler::beginSimulatedMemoryPressure() 16:38:53.883 16386 12 0x116459878 invocation function for block in WTF::MemoryPressureHandler::install() 16:38:53.883 16386 13 0x1850d1b54 notify_monitor_file 16:38:53.883 16386 14 0x180fba338 _dispatch_block_async_invoke2 16:38:53.883 16386 15 0x180fc485c _dispatch_client_callout 16:38:53.883 16386 16 0x180fe1b58 _dispatch_main_queue_drain.cold.5 16:38:53.883 16386 17 0x180fb9db0 _dispatch_main_queue_drain 16:38:53.883 16386 18 0x180fb9cec _dispatch_main_queue_callback_4CF 16:38:53.883 16386 19 0x18128bda4 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ 16:38:53.883 16386 20 0x18124ca9c __CFRunLoopRun 16:38:53.883 16386 21 0x18124bc58 CFRunLoopRunSpecific 16:38:53.883 16386 22 0x18281ac78 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 16:38:53.883 16386 23 0x103710724 TestWebKitAPI::Util::spinRunLoop(unsigned long long) 16:38:53.883 16386 24 0x102e06810 ProcessSwap_MemoryPressureDuringProcessSwap_Test::TestBody() 16:38:53.883 16386 25 0x103807b74 void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) 16:38:53.883 16386 26 0x1037c0924 void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) 16:38:53.883 16386 27 0x1037c0874 testing::Test::Run() 16:38:53.883 16386 28 0x1037c17a4 testing::TestInfo::Run() 16:38:53.883 16386 29 0x1037c2938 testing::TestSuite::Run() 16:38:53.883 16386 30 0x1037d0744 testing::internal::UnitTestImpl::RunAllTests() 16:38:53.884 16386 31 0x10380c8a8 bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)

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Radar WebKit Bug Importer

Comment 1 2025-10-01 10:49:38 PDT

<rdar://problem/161749579>

Ben Nham

Comment 2 2025-10-01 18:00:18 PDT

Pull request: https://github.com/WebKit/WebKit/pull/51660

EWS

Comment 3 2025-10-02 09:58:18 PDT

Committed 300884@main (3a5023d40097): <https://commits.webkit.org/300884@main> Reviewed commits have been landed. Closing PR #51660 and removing active labels.

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