tree 7c39d4b28fb97396012a53c49702847103f9e5ed
parent 726be38d7400cf81fa9c0fbcd3106b770db1ee70
author Mitch Phillips <31459023+hctim@users.noreply.github.com> 1612305148 -0800
committer Copybara-Service <copybara-worker@google.com> 1612524376 -0800

[GWP-ASan] Add locking around unwinder for atfork protection.

Unwinders (like libc's backtrace()) can call their own locks (like the
libdl lock). We need to let the unwinder release the locks before
forking. Wrap a new lock around the unwinder for atfork protection.

Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D95889

GitOrigin-RevId: 30973f6fe01cc0a9624147466f0c54b91a1b61d7