216555 2020-09-15 09:07:42 -0700 Improve thread-safety in ScriptProcessorNode implementation 2020-09-15 11:58:16 -0700 1 1 1 Unclassified WebKit Web Audio WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 212611 1 cdumez cdumez darin eric.carlson ews-watchlist ggaren glenn jer.noble philipj sergio webkit-bug-importer oldest_to_newest 1688703 0 cdumez 2020-09-15 09:07:42 -0700 Improve thread-safety in ScriptProcessorNode implementation. 1688705 1 408822 cdumez 2020-09-15 09:10:01 -0700 Created attachment 408822 Patch 1688733 2 408822 ggaren 2020-09-15 10:01:41 -0700 Comment on attachment 408822 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=408822&action=review > Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp:189 > + // Reference ourself so we don't accidentally get deleted before fireProcessEvent() gets called. > + ref(); Can this just be a RefPtr? Also: How is it OK that the main thread can ref/deref at any time? I don't see anything that would make that reference count correct. 1688735 3 408822 cdumez 2020-09-15 10:04:26 -0700 Comment on attachment 408822 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=408822&action=review >> Source/WebCore/Modules/webaudio/ScriptProcessorNode.cpp:189 >> + ref(); > > Can this just be a RefPtr? > > Also: How is it OK that the main thread can ref/deref at any time? I don't see anything that would make that reference count correct. This is not new code. I will check, we may be able to use RefPtr. 1688744 4 408830 cdumez 2020-09-15 10:34:00 -0700 Created attachment 408830 Patch 1688745 5 cdumez 2020-09-15 10:34:44 -0700 I switched the code to using a Ref<> instead of explicit ref/deref, as suggested. 1688774 6 408830 ggaren 2020-09-15 11:31:08 -0700 Comment on attachment 408830 Patch r=me This seems like an improvement; but I'm pretty sure this code is still not thread-safe. 1688791 7 ews-feeder 2020-09-15 11:57:18 -0700 Committed r267094: <https://trac.webkit.org/changeset/267094> All reviewed patches have been landed. Closing bug and clearing flags on attachment 408830. 1688793 8 webkit-bug-importer 2020-09-15 11:58:16 -0700 <rdar://problem/68934215> 408822 2020-09-15 09:10:01 -0700 2020-09-15 10:33:59 -0700 Patch bug-216555-20200915091001.patch text/plain 8044 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjY3MDg2CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggMjg4Mzg1NDQ1NjJjZDM3 Zjc2MTQzZWUxOGNkY2I0NGVkN2NhZGYzNC4uMjAwMmMyY2E1MDBhMjcwYTMwOGYwOTE4ZDk3ZDZi OTdiYTgyNmFmNSAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDIyIEBACisyMDIwLTA5LTE1ICBDaHJp cyBEdW1leiAgPGNkdW1lekBhcHBsZS5jb20+CisKKyAgICAgICAgSW1wcm92ZSB0aHJlYWQtc2Fm ZXR5IGluIFNjcmlwdFByb2Nlc3Nvck5vZGUgaW1wbGVtZW50YXRpb24KKyAgICAgICAgaHR0cHM6 Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTIxNjU1NQorCisgICAgICAgIFJldmll d2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIEltcHJvdmUgdGhyZWFkLXNhZmV0eSBp 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