Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 59012130505d6145ec4e7a8dc6e718106a8baba7
https://github.com/WebKit/WebKit/commit/59012130505d6145ec4e7a8dc6e718106a8baba7
Author: Mark Lam <[email protected]>
Date: 2024-05-24 (Fri, 24 May 2024)
Changed paths:
M Source/JavaScriptCore/bytecode/CodeBlock.cpp
M Source/JavaScriptCore/bytecode/MetadataTable.cpp
M Source/JavaScriptCore/bytecode/MetadataTable.h
Log Message:
-----------
Speculative mitigation against a crash involving CodeBlock::m_metadata.
https://bugs.webkit.org/show_bug.cgi?id=274691
rdar://127571559
Reviewed by Yijia Huang and Yusuke Suzuki.
We sometimes see crashes due to CodeBlock::m_metadata->unlinkedMetadata() being
null.
This change adds a speculative null check to mitigate against stepping on this.
* Source/JavaScriptCore/bytecode/CodeBlock.cpp:
(JSC::CodeBlock::~CodeBlock):
* Source/JavaScriptCore/bytecode/MetadataTable.cpp:
(JSC::MetadataTable::destroy):
* Source/JavaScriptCore/bytecode/MetadataTable.h:
(JSC::MetadataTable::isDestroyed const):
Canonical link: https://commits.webkit.org/279300@main
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