Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 81cd57ae80ca47a6ad3beaab8ced487b69351f99
https://github.com/WebKit/WebKit/commit/81cd57ae80ca47a6ad3beaab8ced487b69351f99
Author: Sosuke Suzuki <sos...@bun.sh>
Date: 2025-08-28 (Thu, 28 Aug 2025)
Changed paths:
M Source/JavaScriptCore/Scripts/wkbuiltins/builtins_generator.py
M Source/JavaScriptCore/Scripts/wkbuiltins/builtins_model.py
M Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.cpp
M Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.h
M Source/JavaScriptCore/runtime/InlineAttribute.h
Log Message:
-----------
[JSC] Add `@neverInline` attribute for JS builtins
https://bugs.webkit.org/show_bug.cgi?id=297890
Reviewed by Yusuke Suzuki.
This patch adds the `@neverInline` attribute for JS builtin functions to prevent
them from being inlined by the DFG JIT compiler. This attribute uses the same
mechanism as `$vm.noInline` to suppress inlining by setting the `m_neverInlined`
flag on the FunctionExecutable.
This new attribute is not expected to be used frequently. However, it will be
useful
for special use cases such as implementing asynchronous stack traces[1].
[1]: https://bugs.webkit.org/show_bug.cgi?id=296261
* Source/JavaScriptCore/Scripts/wkbuiltins/builtins_generator.py:
(BuiltinsGenerator.generate_embedded_code_data_for_function):
* Source/JavaScriptCore/Scripts/wkbuiltins/builtins_model.py:
(BuiltinFunction.__init__):
(BuiltinFunction.fromString):
* Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.cpp:
(JSC::UnlinkedFunctionExecutable::link):
* Source/JavaScriptCore/bytecode/UnlinkedFunctionExecutable.h:
* Source/JavaScriptCore/runtime/InlineAttribute.h:
Canonical link: https://commits.webkit.org/299245@main
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