[all-commits] [llvm/llvm-project] 572930: [NFC][TSan] Move ObtainCurrentStack out of ThreadR...

[Vitaly Buka via All-commits]

  Branch: refs/heads/users/vitalybuka/spr/nfctsan-move-obtaincurrentstack-out-of-threadregistrylock-scope
  Home:   https://github.com/llvm/llvm-project
  Commit: 5729303d68d2a4ad588e6e4126ac477073e09b96
      https://github.com/llvm/llvm-project/commit/5729303d68d2a4ad588e6e4126ac477073e09b96
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2026-10-03 (Sat, 03 Oct 2026)

  Changed paths:
    M compiler-rt/lib/tsan/rtl/tsan_interface_ann.cpp
    M compiler-rt/lib/tsan/rtl/tsan_rtl_mutex.cpp

  Log Message:
  -----------
  [NFC][TSan] Move ObtainCurrentStack out of ThreadRegistryLock scope

ObtainCurrentStack only reads the current thread's shadow stack and
allocates a VarSizeStackTrace buffer, which does not require
ThreadRegistryLock (and already runs outside ThreadRegistryLock in
ReportRace, SignalUnsafeCall, and ReportErrnoSpoiling).

Move ObtainCurrentStack (and dummy_pc in ReportDeadlock) before
ScopedReport in ReportMutexHeldWrongContext, ReportMutexMisuse,
ReportDeadlock, and ReportDestroyLocked so the stack trace buffers also
outlive ScopedReport and OutputReport.

Assisted-by: Gemini

Pull Request: https://github.com/llvm/llvm-project/pull/228794



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