fix(#169): symbolize MemorySanitizer reports - #434
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The run_under wrapper exported ASAN_SYMBOLIZER_PATH and TSAN_SYMBOLIZER_PATH but not the MSan one, so the first real MSan run produced reports that were just lists of raw addresses - unusable, since the frame that read the uninitialized value IS the report. Export MSAN_SYMBOLIZER_PATH alongside the other two. Context: the instrumented libc++ now builds and MSan runs the suite, reporting a consistent use-of-uninitialized-value. Triaging that needs readable frames first; the cell stays continue-on-error meanwhile.
helly25
enabled auto-merge (squash)
August 9, 2026 23:37
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MSan now works end to end: the instrumented libc++ builds and the suite runs under it, reporting a consistent
use-of-uninitialized-value.But the reports are unusable for triage - the run_under wrapper exported
ASAN_SYMBOLIZER_PATHandTSAN_SYMBOLIZER_PATHand notMSAN_SYMBOLIZER_PATH, so every frame is a raw address. The frame that read the uninitialized value is the entire value of the report.The
msancell stayscontinue-on-errorwhile the findings are triaged, exactly as the clang-tidy cell was introduced.