RESOLVED FIXED315050
[CMake][Mac] mac-tsan: set USE_SYSTEM_MALLOC=ON and guard TSan bindir against uninstrumented reconfigure 
https://bugs.webkit.org/show_bug.cgi?id=315050
Summary [CMake][Mac] mac-tsan: set USE_SYSTEM_MALLOC=ON and guard TSan bindir against...
Simon Lewis
Reported 2026-05-18 14:41:20 PDT
Two fixes for the mac-tsan preset: 1. Set USE_SYSTEM_MALLOC=ON. e05f64d91da made bmalloc force BUSE_SYSTEM_MALLOC=1 under __has_feature(thread_sanitizer) (BPlatform.h), so BUSE_TZONE=0. But WTF's PlatformUse.h has no matching TSan branch, so USE_TZONE_MALLOC stays 1, and TZoneMalloc.h #errors "TZones enabled in WTF, but not enabled in bmalloc". Setting USE_SYSTEM_MALLOC at the preset level keeps WTF and bmalloc in agreement. 2. Extend the OptionsMac.cmake bindir-name guard to TSan. When a ninja-triggered RERUN_CMAKE wipes CMakeCache.txt, the reconfigure runs without --preset and silently produces an uninstrumented build. The ASan tree already FATAL_ERRORs on this; do the same for TSan.
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Radar WebKit Bug Importer
Comment 1 2026-05-18 14:41:25 PDT
<rdar://problem/177376705>
EWS
Comment 2 2026-05-19 08:42:12 PDT
Committed 313486@main (6acf180f923e): <https://commits.webkit.org/313486@main> Reviewed commits have been landed. Closing PR #65135 and removing active labels.
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