Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 5c7aadfa0a96836a55073eb6b5557ba40f616408
https://github.com/WebKit/WebKit/commit/5c7aadfa0a96836a55073eb6b5557ba40f616408
Author: Keith Miller <[email protected]>
Date: 2025-09-29 (Mon, 29 Sep 2025)
Changed paths:
A JSTests/stress/array-osr-exit-materialize-hole.js
M Source/JavaScriptCore/ftl/FTLOperations.cpp
M Source/JavaScriptCore/runtime/ArrayPrototype.cpp
M Source/JavaScriptCore/runtime/Butterfly.h
M Source/JavaScriptCore/runtime/ButterflyInlines.h
M Source/JavaScriptCore/runtime/JSArray.cpp
M Source/JavaScriptCore/runtime/JSArray.h
Log Message:
-----------
operationMaterializeObjectInOSR needs to initialize Butterflies it creates.
https://bugs.webkit.org/show_bug.cgi?id=299761
rdar://161317599
Reviewed by Mark Lam and Yusuke Suzuki.
Butterfly::tryCreate does *not* initialize the indexed storage it creates.
Thus when OSR exiting with a sunk Array allocation any holes in the array were
not filled and left uninitialized.
Test: JSTests/stress/array-osr-exit-materialize-hole.js
Canonical link: https://commits.webkit.org/300709@main
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