Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 6063bc484b4f523c354231080d5bc2fca0b536f1
https://github.com/WebKit/WebKit/commit/6063bc484b4f523c354231080d5bc2fca0b536f1
Author: Mark Lam <mark....@apple.com>
Date: 2023-06-22 (Thu, 22 Jun 2023)
Changed paths:
M Source/JavaScriptCore/assembler/CPU.cpp
M Source/JavaScriptCore/assembler/CPU.h
M Source/JavaScriptCore/jit/ExecutableAllocator.cpp
Log Message:
-----------
Skip JIT memory allocation in ExecutableAllocator::disableJIT() when running
on an open source XNU.
https://bugs.webkit.org/show_bug.cgi?id=258409
rdar://111170164
Reviewed by Yusuke Suzuki.
The open source XNU does not support special handling of JIT memory. However,
macOS Safari and
WebKit binaries still need to be able to run on the open source XNU, albeit
without JIT.
However, ExecutableAllocator::disableJIT() is still trying to allocated JIT
memory if the JIT
entitlement is present (which is defined by the WebKit binary, not the kernel),
and currently,
will assert that the allocation succeeds. We need to skip this allocation and
assertion when
running on open source XNU because the allocation is not necessary, and the
assertion is invalid
for the open source kernel and will fail every time. This patch implements
this skipping.
* Source/JavaScriptCore/assembler/CPU.cpp:
(JSC::isKernOpenSource):
* Source/JavaScriptCore/assembler/CPU.h:
* Source/JavaScriptCore/jit/ExecutableAllocator.cpp:
(JSC::ExecutableAllocator::disableJIT):
Canonical link: https://commits.webkit.org/265435@main
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