[all-commits] [llvm/llvm-project] c48314: tsan: improve detection of stack/tls races

[Dmitry Vyukov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c483140f3ce28ea243d414dd0dee0c0f13c5b01c
      https://github.com/llvm/llvm-project/commit/c483140f3ce28ea243d414dd0dee0c0f13c5b01c
  Author: Dmitry Vyukov <dvyukov at google.com>
  Date:   2021-10-05 (Tue, 05 Oct 2021)

  Changed paths:
    M compiler-rt/lib/tsan/rtl/tsan_platform_linux.cpp
    M compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp
    M compiler-rt/lib/tsan/rtl/tsan_rtl_thread.cpp

  Log Message:
  -----------
  tsan: improve detection of stack/tls races

Print meaningful stack frames for stack/tls races
(instead of PC 1/2 that don't symbolize).

Imitate stack/tls writes after we create and initialize
the new thread, otherwise the races are not detected.

This is re-submit of the following reverted commits,
but without tests as they failed on a number of OSes/arches:
"tsan: fix and test detection of TLS races"
"tsan: fix tls_race3 test on darwin"
"tsan: print a meaningful frame for stack races"

Differential Revision: https://reviews.llvm.org/D111147