227875 2021-07-12 08:54:45 -0700 Regression(r279601) ProcessAssertion may get destroyed on a background thread 2021-07-26 08:49:29 -0700 1 1 1 Unclassified WebKit WebKit2 WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=228281 InRadar P2 Normal --- 225324 1 cdumez cdumez achristensen darin ggaren kkinnunen sam webkit-bug-importer oldest_to_newest 1776337 0 cdumez 2021-07-12 08:54:45 -0700 r279601 added an internal WorkQueue to ProcessAssertion, so that we could acquire the RunningBoard assertion asynchronously on the background queue. When dispatching to the background queue, we capture |protectedThis|, which means that ProcessAssertion may now get destroyed on the background queue. ProcessAssertion is a main thread object and destroying it on a non-main thread can lead to crashes. 1776338 1 cdumez 2021-07-12 08:54:58 -0700 <rdar://76972252> 1776340 2 433323 cdumez 2021-07-12 08:56:23 -0700 Created attachment 433323 Patch 1776344 3 433325 cdumez 2021-07-12 09:04:51 -0700 Created attachment 433325 Patch 1776358 4 433325 ggaren 2021-07-12 10:12:28 -0700 Comment on attachment 433325 Patch r=me 1776360 5 ews-feeder 2021-07-12 10:26:07 -0700 Committed r279835 (239595@main): <https://commits.webkit.org/239595@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 433325. 1776378 6 cdumez 2021-07-12 11:07:07 -0700 Reverted r279835 for reason: Newly added assertions are wrong Committed r279840 (239599@main): <https://commits.webkit.org/239599@main> 1776381 7 433325 cdumez 2021-07-12 11:11:04 -0700 Comment on attachment 433325 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=433325&action=review > Source/WebKit/UIProcess/ios/ProcessAssertionIOS.mm:324 > + ASSERT(isMainRunLoop()); WebSQLiteDatabaseTracker takes and releases assertions on a non-main thread (with a lock) so those assertions hit in debug. I am reworking the patch. 1776397 8 433338 cdumez 2021-07-12 11:47:29 -0700 Created attachment 433338 Patch 1776460 9 433338 cdumez 2021-07-12 14:39:31 -0700 Comment on attachment 433338 Patch Requesting review again because the patch has changed substantially. 1776660 10 433338 ggaren 2021-07-13 10:07:01 -0700 Comment on attachment 433338 Patch r=me 1776664 11 ews-feeder 2021-07-13 10:10:19 -0700 Committed r279877 (239630@main): <https://commits.webkit.org/239630@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 433338. 1779451 12 cdumez 2021-07-26 08:43:49 -0700 This was actually rdar://problem/80344055 433323 2021-07-12 08:56:23 -0700 2021-07-12 09:05:24 -0700 Patch bug-227875-20210712085623.patch text/plain 3056 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjc5ODI2CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0L0No YW5nZUxvZyBiL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCmluZGV4IDQ3ZWU4ODkzY2Y1NzhhMTQw ODdjNzA5NTFjNWY0OTE1MzgzYjI1OWEuLjM4ZWE3MTc4OGI5ZDg1ZTllMzFiYzNlMDcxM2IwYTBk YzM1YjUyZjMgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCisrKyBiL1NvdXJj ZS9XZWJLaXQvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMjEgQEAKKzIwMjEtMDctMTIgIENocmlzIER1 bWV6ICA8Y2R1bWV6QGFwcGxlLmNvbT4KKworICAgICAgICBSZWdyZXNzaW9uKHIyNzk2MDEpIFBy b2Nlc3NBc3NlcnRpb24gbWF5IGdldCBkZXN0cm95ZWQgb24gYSBiYWNrZ3JvdW5kIHRocmVhZAor ICAgICAgICBodHRwczovL2J1Z3Mud2Via2l0Lm9yZy9zaG93X2J1Zy5jZ2k/aWQ9MjI3ODc1Cisg ICAgICAgIDxyZGFyOi8vNzY5NzIyNTI+CisKKyAgICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChP 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