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CodeBlock should reset its StubInfo when jettisoned https://bugs.webk…#1664

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CodeBlock should reset its StubInfo when jettisoned https://bugs.webk…#1664
aoikonomopoulos wants to merge 1 commit intoWebPlatformForEmbedded:wpe-2.38from
aoikonomopoulos:wpe-2.38-backport-CodeBlock-should-reset

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@aoikonomopoulos aoikonomopoulos commented May 5, 2026

…it.org/show_bug.cgi?id=288554 rdar://144072285

Reviewed by Yusuke Suzuki.

CodeBlock's StubInfo can keep watchpoints alive which do not ref data they hold, meaning that when the CodeBlock is jettisoned, we may have dangling pointers to data that was freed during a GC.

  • Source/JavaScriptCore/bytecode/CodeBlock.cpp: (JSC::CodeBlock::jettison):

Originally-landed-as: 289651.190@safari-7621-branch (15053072f223). rdar://148056646
Canonical link: https://commits.webkit.org/293230@main

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< bug title >
https://bugs.webkit.org/show_bug.cgi?id=#####

Reviewed by NOBODY (OOPS!).

Explanation of why this fixes the bug (OOPS!).

* path/changed.ext:
(function):
(class.function):

c9241c1

Build-Tests Layout-Tests
✅ 🛠 wpe-238-amd64-build ⏳ 🧪 wpe-238-amd64-layout
✅ 🛠 wpe-238-arm32-build ⏳ 🧪 wpe-238-arm32-layout

…it.org/show_bug.cgi?id=288554 rdar://144072285

Reviewed by Yusuke Suzuki.

CodeBlock's StubInfo can keep watchpoints alive which do not ref data they hold, meaning
that when the CodeBlock is jettisoned, we may have dangling pointers to data that was
freed during a GC.

* Source/JavaScriptCore/bytecode/CodeBlock.cpp:
(JSC::CodeBlock::jettison):

Originally-landed-as: 289651.190@safari-7621-branch (15053072f223). rdar://148056646
Canonical link: https://commits.webkit.org/293230@main
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