[all-commits] [llvm/llvm-project] 42fc99: asan_memory_profile: Fix for deadlock in memory pr...

[Sanjeet Karan Singh via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 42fc9929ab591fe0aefdbaad529fe5087293c641
      https://github.com/llvm/llvm-project/commit/42fc9929ab591fe0aefdbaad529fe5087293c641
  Author: Sanjeet Karan Singh <ssingh6 at ciena.com>
  Date:   2023-04-04 (Tue, 04 Apr 2023)

  Changed paths:
    M compiler-rt/lib/asan/asan_memory_profile.cpp

  Log Message:
  -----------
  asan_memory_profile: Fix for deadlock in memory profiler code.

Calling symbolization directly from stopTheWorld was causing deadlock.
For libc dep systems, symbolization uses dl_iterate_phdr, which acquire a
dl write lock. It could deadlock if the lock is already acquired by one of
suspended.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D146990