Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 7ce4006e3d05bbd0d2215012b3887dba805e3e07
https://github.com/WebKit/WebKit/commit/7ce4006e3d05bbd0d2215012b3887dba805e3e07
Author: Tim Chevalier <[email protected]>
Date: 2023-02-16 (Thu, 16 Feb 2023)
Changed paths:
A JSTests/wasm/gc/bug252299.js
M Source/JavaScriptCore/wasm/WasmLLIntGenerator.cpp
Log Message:
-----------
[Wasm-GC] Initialize all ref-typed locals to JS null value
https://bugs.webkit.org/show_bug.cgi?id=252299
Reviewed by Yusuke Suzuki and Tadeu Zagallo.
`LLIntGenerator::addLocal()` was only initializing uninitialized locals
to the JS null value if they were typed `Funcref` or `Externref`,
meaning that array- or struct-typed locals would be initialized to 0.
This caused a segfault if they were accessed with set/get operations.
Changed `addLocal()` to initialize all ref-typed locals to null.
* Source/JavaScriptCore/wasm/WasmLLIntGenerator.cpp:
(JSC::Wasm::LLIntGenerator::addLocal):
Canonical link: https://commits.webkit.org/260389@main
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