Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: ca5e69e829722666caa292025996d15c3fa077aa
https://github.com/WebKit/WebKit/commit/ca5e69e829722666caa292025996d15c3fa077aa
Author: Dan Hecht <[email protected]>
Date: 2026-07-16 (Thu, 16 Jul 2026)
Changed paths:
M Source/bmalloc/libpas/libpas.xcodeproj/project.pbxproj
A Source/bmalloc/libpas/src/test/AllocationZeroingTests.cpp
M Source/bmalloc/libpas/src/test/TestHarness.cpp
M Source/bmalloc/libpas/src/test/xctest/LibpasTests.mm
Log Message:
-----------
[libpas] Add AllocationZeroingTests: functional zeroed-reuse tests
https://bugs.webkit.org/show_bug.cgi?id=319599
rdar://182424502
Reviewed by Marcus Plutowski.
Add a functional test file that drives the real bmalloc public zeroing API
end to end and verifies the zeroed allocation path always returns
fully-zeroed memory, including when a freed region is reused.
Each case does zeroed-alloc / verify-zero / dirty / free /
reallocate-same-size / verify-zero, run across several axes:
- Size: representative points for every regime of the zeroed-malloc path --
small- and medium-segregated, medium- and marge-bitfit, and the large
heap's memset and virtual-memory zeroing paths. Sizes are derived from
the config's page-size and threshold constants, so the run keeps hitting
the interesting boundaries if a config changes.
- Alignment: the natural minimum plus a range of explicit alignments.
- Variant: the untagged and tagged zeroed entry points.
- Reuse: both immediate free-list reuse and forced decommit/recommit (a
synchronous scavenge between free and reuse).
Registers the suite in TestHarness.cpp, the Xcode project, and the xctest
suite list.
Test: Source/bmalloc/libpas/src/test/AllocationZeroingTests.cpp
* Source/bmalloc/libpas/libpas.xcodeproj/project.pbxproj:
* Source/bmalloc/libpas/src/test/AllocationZeroingTests.cpp: Added.
(std::dirtyBuffer):
(std::firstNonZeroByte):
(std::variantName):
(std::alignmentApiName):
(std::allocateZeroed):
(std::deallocateVariant):
(std::reportParameters):
(std::checkIsZeroed):
(std::checkIsAligned):
(std::zeroingReuse):
(std::runZeroingReuse):
(std::segregatedRegimeSizes):
(std::bitfitRegimeSizes):
(std::largeMemsetRegimeSizes):
(std::largeVirtualMemoryRegimeSizes):
(std::testZeroingReuseSegregatedSizes):
(std::testZeroingReuseBitfitSizes):
(std::testZeroingReuseLargeMemsetSizes):
(std::testZeroingReuseLargeVirtualMemorySizes):
(std::testZeroingReuseWithScavengeSegregatedSizes):
(std::testZeroingReuseWithScavengeBitfitSizes):
(std::testZeroingReuseWithScavengeLargeMemsetSizes):
(std::testZeroingReuseWithScavengeLargeVirtualMemorySizes):
(addAllocationZeroingTests):
* Source/bmalloc/libpas/src/test/TestHarness.cpp:
(main):
* Source/bmalloc/libpas/src/test/xctest/LibpasTests.mm:
Canonical link: https://commits.webkit.org/317336@main
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