Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: ee19c59a58e727d26bc3d36b0d8e63b06a1371a8
https://github.com/WebKit/WebKit/commit/ee19c59a58e727d26bc3d36b0d8e63b06a1371a8
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:
-----------
Re-landing: 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.
Update: added build fix for PLATFORM(MACCATALYST).
* 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/265446@main
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