Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 1747d6d1de6d24d928964c0bf6f62de4d580f5d2
https://github.com/WebKit/WebKit/commit/1747d6d1de6d24d928964c0bf6f62de4d580f5d2
Author: Marcus Plutowski <[email protected]>
Date: 2025-06-28 (Sat, 28 Jun 2025)
Changed paths:
M Source/bmalloc/bmalloc.xcodeproj/project.pbxproj
A Source/bmalloc/bmalloc/VMAllocate.cpp
M Source/bmalloc/bmalloc/VMAllocate.h
Log Message:
-----------
[bmalloc] Use madvise(MADV_ZERO) instead of mmap to zero memory
https://bugs.webkit.org/show_bug.cgi?id=295104
rdar://154496366
Reviewed by Yusuke Suzuki.
Using mmap is pessimizing; I previously fixed this for libpas,
but I didn't realize at the time that there's a parallel flow
in bmalloc. This change thus corresponds to 296321@main, which
solves the same issue but for libpas.
* Source/bmalloc/bmalloc.xcodeproj/project.pbxproj:
* Source/bmalloc/bmalloc/VMAllocate.cpp: Added.
(bmalloc::zeroFillLatchIfMadvZeroIsSupported):
(bmalloc::isMadvZeroSupported):
* Source/bmalloc/bmalloc/VMAllocate.h:
(bmalloc::vmZeroAndPurge):
Canonical link: https://commits.webkit.org/296771@main
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