[all-commits] [llvm/llvm-project] a4b42c: [llvm] Protect signpost map with a mutex

[Jonas Devlieghere via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: a4b42c621b9e2009cfd8bc9265bbf970c7231271
      https://github.com/llvm/llvm-project/commit/a4b42c621b9e2009cfd8bc9265bbf970c7231271
  Author: Jonas Devlieghere <jonas at devlieghere.com>
  Date:   2021-01-19 (Tue, 19 Jan 2021)

  Changed paths:
    M llvm/lib/Support/Signposts.cpp

  Log Message:
  -----------
  [llvm] Protect signpost map with a mutex

Use a mutex to protect concurrent access to the signpost map. This fixes
nondeterministic crashes in LLDB that appeared after using signposts in
the timer implementation.

Differential revision: https://reviews.llvm.org/D94285