RESOLVED FIXED323682
[ANGLE] Re-enable PoolAllocator under AddressSanitizer 
https://bugs.webkit.org/show_bug.cgi?id=323682
Summary [ANGLE] Re-enable PoolAllocator under AddressSanitizer
David Kilzer (:ddkilzer)
Reported 2026-09-08 11:17:44 PDT
ANGLE's `angle::PoolAllocator` (used by the shader translator) is currently bypassed in favor of the system allocator under both AddressSanitizer and ThreadSanitizer builds. This bypass was introduced in Bug 313441 (312740@main). Under ASan, bypassing the PoolAllocator makes ANGLE pathologically slow: some shader-translation test cases run significantly slower than the usual ASan slowdown. The PoolAllocator already integrates with ASan -- it poisons and unpoisons its own redzones via `__asan_poison_memory_region` / `__asan_unpoison_memory_region` -- so ASan continues to detect out-of-bounds access to pool allocations while the pool is enabled. There is no signal that bypassing the pool helps ASan find additional bugs. The bypass is only needed for ThreadSanitizer.
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Radar WebKit Bug Importer
Comment 1 2026-09-08 11:17:55 PDT
<rdar://problem/186936657>
David Kilzer (:ddkilzer)
Comment 2 2026-09-08 12:26:46 PDT
Pull request: https://github.com/WebKit/WebKit/pull/73486
EWS
Comment 3 2026-09-09 13:14:01 PDT
Committed 320756@main (8a3192a38590): <https://commits.webkit.org/320756@main> Reviewed commits have been landed. Closing PR #73486 and removing active labels.
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