Semaphore is implemented with a mutex and condition variable.
When a semaphore is used in TimerTest, Run() acquires a lock
to guard its CV but may be interrupted by the signal handler
before releasing the lock which results in a hang when
Signal(), called from the signal handler, also needs to
acquire the lock.
Bug: chromium:1050178
Change-Id: I0d7ef65bd159ee2de9258ba24537f9470f4c621d
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2318554
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Joshua Peraza <jperaza@chromium.org>
e89ba0d1d6