229839 2021-09-02 16:21:10 -0700 FontFaceSet.status needs to react to style changes 2021-09-07 23:52:26 -0700 1 1 1 Unclassified WebKit New Bugs WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=229975 InRadar P2 Normal --- 229850 229911 229975 1 mmaxfield mmaxfield clopez esprehn+autocc ews-watchlist fujii glenn gyuyoung.kim macpherson menard sam webkit-bug-importer oldest_to_newest 1789961 0 mmaxfield 2021-09-02 16:21:10 -0700 FontFaceSet.status needs to react to style changes 1789963 1 437212 mmaxfield 2021-09-02 16:23:33 -0700 Created attachment 437212 Patch 1790009 2 437212 mmaxfield 2021-09-02 18:50:02 -0700 Comment on attachment 437212 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=437212&action=review > LayoutTests/ChangeLog:8 > + This is not a WPT test because it requires webfont/slow-ahem-loading.cgi. Oh, I think I can actually turn this into a WPT test 1790016 3 437212 mmaxfield 2021-09-02 18:55:10 -0700 Comment on attachment 437212 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=437212&action=review >> LayoutTests/ChangeLog:8 >> + This is not a WPT test because it requires webfont/slow-ahem-loading.cgi. > > Oh, I think I can actually turn this into a WPT test Oh, no, I can't, because the font may be cached, which will make the status update synchronously. So this needs internals.clearMemoryCache(). But I can at least make it less racey. 1790020 4 437233 mmaxfield 2021-09-02 19:13:35 -0700 Created attachment 437233 Patch 1790208 5 437233 sam 2021-09-03 09:43:17 -0700 Comment on attachment 437233 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=437233&action=review > Source/WebCore/css/FontFaceSet.cpp:191 > + auto protect = m_backing; Hm. This clearly does the right thing, but I usually like to ensure we are actually in a Ref or RefPtr when using the protect idiom by doing something like: Ref protect = backing; just to make sure that if m_backing ever changes type this is still doing what we expect. Since m_backing is a Ref, I guess the posibilities here are that either 'this' got deleted or m_backing got replaced and the original value got deleted. Would be interesting to try and add tests for either of those cases if possible. 1790307 6 437233 mmaxfield 2021-09-03 12:51:51 -0700 Comment on attachment 437233 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=437233&action=review >> Source/WebCore/css/FontFaceSet.cpp:191 >> + auto protect = m_backing; > > Hm. This clearly does the right thing, but I usually like to ensure we are actually in a Ref or RefPtr when using the protect idiom by doing something like: > > Ref protect = backing; > > just to make sure that if m_backing ever changes type this is still doing what we expect. > > Since m_backing is a Ref, I guess the posibilities here are that either 'this' got deleted or m_backing got replaced and the original value got deleted. Would be interesting to try and add tests for either of those cases if possible. Yeah. I'll land this with "Ref" instead of "auto" and I'll try to come up with a test that exercises the deletion problem in a follow-up. 1790317 7 mmaxfield 2021-09-03 13:03:31 -0700 Committed r282015 (241320@main): <https://commits.webkit.org/241320@main> 1790318 8 webkit-bug-importer 2021-09-03 13:04:22 -0700 <rdar://problem/82735622> 1790563 9 fujii 2021-09-05 12:50:48 -0700 fast/text/FontFaceSet-status-after-style-update.html is flaky. https://results.webkit.org/?suite=layout-tests&test=fast%2Ftext%2FFontFaceSet-status-after-style-update.html 1790822 10 clopez 2021-09-06 16:49:44 -0700 (In reply to Fujii Hironori from comment #9) > fast/text/FontFaceSet-status-after-style-update.html is flaky. > https://results.webkit.org/?suite=layout- > tests&test=fast%2Ftext%2FFontFaceSet-status-after-style-update.html Reported it on bug 229975 437212 2021-09-02 16:23:33 -0700 2021-09-02 19:13:34 -0700 Patch bug-229839-20210902162332.patch text/plain 4879 mmaxfield 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