Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 6bdb4f69e23bba6d8c105477da09c4edec06ffaa
https://github.com/WebKit/WebKit/commit/6bdb4f69e23bba6d8c105477da09c4edec06ffaa
Author: Yusuke Suzuki <[email protected]>
Date: 2026-08-04 (Tue, 04 Aug 2026)
Changed paths:
M Source/JavaScriptCore/heap/Heap.cpp
M Source/JavaScriptCore/heap/LocalAllocator.cpp
M Source/JavaScriptCore/heap/LocalAllocator.h
M Source/JavaScriptCore/heap/MarkedBlock.cpp
M Source/JavaScriptCore/heap/MarkedBlock.h
M Source/JavaScriptCore/heap/MarkedSpace.cpp
M Source/JavaScriptCore/heap/MarkedSpace.h
Log Message:
-----------
[JSC] Simplify VM teardown via specialized stopAllocationForGood
https://bugs.webkit.org/show_bug.cgi?id=321015
rdar://184053208
Reviewed by Keith Miller.
This attempts to reduce VM teardown time by simplifying
MarkedSpace::lastChanceToFinalize. In MarkedBlock::Handle::stopAllocating,
we add StopAllocatingMode::ForGood mode where we do not modify
maintenance bits as we know that we will teardown the VM & Heap
immediately after this call.
* Source/JavaScriptCore/heap/Heap.cpp:
(JSC::Heap::lastChanceToFinalize):
* Source/JavaScriptCore/heap/LocalAllocator.cpp:
(JSC::LocalAllocator::stopAllocating):
(JSC::LocalAllocator::stopAllocatingForGood):
* Source/JavaScriptCore/heap/LocalAllocator.h:
* Source/JavaScriptCore/heap/MarkedBlock.cpp:
(JSC::MarkedBlock::Handle::stopAllocating):
* Source/JavaScriptCore/heap/MarkedBlock.h:
* Source/JavaScriptCore/heap/MarkedSpace.cpp:
(JSC::MarkedSpace::lastChanceToFinalize):
(JSC::MarkedSpace::stopAllocatingForGood): Deleted.
* Source/JavaScriptCore/heap/MarkedSpace.h:
Canonical link: https://commits.webkit.org/318597@main
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