180518 2017-12-06 19:43:46 -0800 Crash in WebCore::SQLiteStatement::prepare() from ServiceWorker I/O Thread 2017-12-08 11:20:43 -0800 1 1 1 Unclassified WebKit Service Workers WebKit Local Build Unspecified Unspecified NEW https://bugs.webkit.org/show_bug.cgi?id=118563 https://bugs.webkit.org/show_bug.cgi?id=180589 P2 Normal --- 1 dbates beidson beidson cdumez youennf oldest_to_newest 1378989 0 dbates 2017-12-06 19:43:46 -0800 In the EWS results (attachment #328671) after processing the patch on bug #180512, I noticed that the following tests are crashing in the ServiceWorker I/O Thread inside WebCore::SQLiteStatement::prepare(): http/tests/inspector/network/resource-response-service-worker.html imported/w3c/web-platform-tests/streams/readable-byte-streams/brand-checks.serviceworker.https.html Paraphrasing the crash log for http/tests/inspector/network/resource-response-service-worker.html (both crashes have the same backtrace and exception code): [[ Process: com.apple.WebKit.Storage.Development [77629] Path: /Volumes/VOLUME/*/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.Storage.xpc/Contents/MacOS/com.apple.WebKit.Storage.Development Identifier: com.apple.WebKit.Storage.Development Version: 605+ (605.1.16+) Code Type: X86-64 (Native) Parent Process: ??? [1] User ID: 501 Date/Time: 2017-12-06 18:18:26.347 -0800 OS Version: Mac OS X 10.11.6 (15G17023) Report Version: 11 Anonymous UUID: 18EE2525-DEB2-9EB7-627F-5FA60686285B Time Awake Since Boot: 8200 seconds System Integrity Protection: disabled Crashed Thread: 3 ServiceWorker I/O Thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018 Exception Note: EXC_CORPSE_NOTIFY Thread 3 Crashed:: ServiceWorker I/O Thread 0 com.apple.WebCore 0x0000000105c17ec7 WebCore::SQLiteStatement::prepare() + 23 (atomic:879) 1 com.apple.WebCore 0x0000000105c1794f WebCore::SQLiteDatabase::executeCommand(WTF::String const&) + 47 (SQLiteStatement.cpp:133) 2 com.apple.WebCore 0x0000000105c1b061 WebCore::SQLiteTransaction::begin() + 129 (SQLiteTransaction.cpp:67) 3 com.apple.WebCore 0x0000000105f86277 WebCore::RegistrationDatabase::doPushChanges(WTF::Vector<WebCore::ServiceWorkerContextData, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>&&) + 55 (memory:2635) 4 com.apple.JavaScriptCore 0x0000000109230f5f WTF::CrossThreadTaskHandler::taskRunLoop() + 127 (memory:2656) 5 com.apple.JavaScriptCore 0x00000001092692a4 WTF::Thread::entryPoint(WTF::Thread::NewThreadContext*) + 228 (memory:2657) 6 com.apple.JavaScriptCore 0x000000010926a899 WTF::wtfThreadEntryPoint(void*) + 9 (ThreadingPthreads.cpp:223) 7 libsystem_pthread.dylib 0x00007fff951ed99d _pthread_body + 131 8 libsystem_pthread.dylib 0x00007fff951ed91a _pthread_start + 168 9 libsystem_pthread.dylib 0x00007fff951eb351 thread_start + 13 ]] 1379588 1 youennf 2017-12-08 09:09:14 -0800 I also got the same crash in EWS bot in processing results of https://bugs.webkit.org/show_bug.cgi?id=179641 1379597 2 cdumez 2017-12-08 09:28:59 -0800 What makes sure m_database is destroyed on the background thread? I see this assertion ASSERT(!m_database); in the ~RegistrationDatabase() destructor (which gets called on the main thread) but I do not see the code that takes care of clearing m_database on the BG thread. 1379610 3 beidson 2017-12-08 10:10:14 -0800 (In reply to Chris Dumez from comment #2) > What makes sure m_database is destroyed on the background thread? I see this > assertion ASSERT(!m_database); in the ~RegistrationDatabase() destructor > (which gets called on the main thread) but I do not see the code that takes > care of clearing m_database on the BG thread. The RegistrationDatabase is never destroyed. 1379612 4 beidson 2017-12-08 10:11:41 -0800 (In reply to Brady Eidson from comment #3) > (In reply to Chris Dumez from comment #2) > > What makes sure m_database is destroyed on the background thread? I see this > > assertion ASSERT(!m_database); in the ~RegistrationDatabase() destructor > > (which gets called on the main thread) but I do not see the code that takes > > care of clearing m_database on the BG thread. > > The RegistrationDatabase is never destroyed. Elaborating: Are SWServers ever destroyed? If not, then RegistrationStores aren't, and RegistrationDatabases aren't. 1379615 5 beidson 2017-12-08 10:15:40 -0800 I actually think what's happening is a pushChanges() is happening without an m_database 1379616 6 beidson 2017-12-08 10:16:16 -0800 Indeed, there's no protection against database operations happening without a valid database. Adding that soon. 1379617 7 beidson 2017-12-08 10:16:39 -0800 (Would be great to know why the DB isn't being created) 1379641 8 328833 beidson 2017-12-08 10:49:52 -0800 Created attachment 328833 Patch 1379643 9 328833 cdumez 2017-12-08 10:52:27 -0800 Comment on attachment 328833 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=328833&action=review > Source/WebCore/workers/service/server/RegistrationDatabase.cpp:204 > + if (!m_successfullyOpened) { If you call pushChanges() right away after constructing the RegistrationDatabase, m_successfullyOpened may not have been set to true yet :/ 1379644 10 beidson 2017-12-08 10:54:19 -0800 (In reply to Chris Dumez from comment #9) > Comment on attachment 328833 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=328833&action=review > > > Source/WebCore/workers/service/server/RegistrationDatabase.cpp:204 > > + if (!m_successfullyOpened) { > > If you call pushChanges() right away after constructing the > RegistrationDatabase, m_successfullyOpened may not have been set to true yet > :/ Such a thing does not happen, though. 1379645 11 beidson 2017-12-08 10:54:45 -0800 (In reply to Brady Eidson from comment #10) > (In reply to Chris Dumez from comment #9) > > Comment on attachment 328833 [details] > > Patch > > > > View in context: > > https://bugs.webkit.org/attachment.cgi?id=328833&action=review > > > > > Source/WebCore/workers/service/server/RegistrationDatabase.cpp:204 > > > + if (!m_successfullyOpened) { > > > > If you call pushChanges() right away after constructing the > > RegistrationDatabase, m_successfullyOpened may not have been set to true yet > > :/ > > Such a thing does not happen, though. Correction: *should* not happen 1379649 12 328833 cdumez 2017-12-08 10:58:30 -0800 Comment on attachment 328833 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=328833&action=review > Source/WebCore/workers/service/server/RegistrationDatabase.cpp:205 > + LOG_ERROR("Attempt to push changes to SW registration database that is not open"); Should be RELEASE_LOG_ERROR. 1379650 13 beidson 2017-12-08 10:59:52 -0800 Going with the one in 180587 for now, will revisit later. (I really need to get 180573 resolved) 1379662 14 cdumez 2017-12-08 11:20:43 -0800 Brady and I think the real underlying issue is https://bugs.webkit.org/show_bug.cgi?id=180589. 328833 2017-12-08 10:49:52 -0800 2017-12-08 10:57:14 -0800 Patch bug-180518-20171208104952.patch text/plain 5512 beidson U3VidmVyc2lvbiBSZXZpc2lvbjogMjI1Njc4CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggMzU4YWJlMWZiMzM4OGIx OWM2OWEyZjRiMTc2MGE2Mjk5YjRhODM3MS4uYTcxOTczYTY3NjFkODdiM2QzOTdkMjlhYzViMTAx YjFiZWI1ZjJjOCAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDE5IEBACisyMDE3LTEyLTA4ICBCcmFk eSBFaWRzb24gIDxiZWlkc29uQGFwcGxlLmNvbT4KKworICAgICAgICBDcmFzaCBpbiBXZWJDb3Jl OjpTUUxpdGVTdGF0ZW1lbnQ6OnByZXBhcmUoKSBmcm9tIFNlcnZpY2VXb3JrZXIgSS9PIFRocmVh ZC4KKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTE4MDUx OAorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIE5vIG5l 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