tree f78839671bc7135e47ef11b9c9c0dcebbdf46463
parent 1a5db57d5a0f633a83f20e667a4698757a63413e
author Brigid Smith <brigidsmith@google.com> 1405982286 -0700
committer Elliott Hughes <enh@google.com> 1406652104 -0700

Added a bionic systrace class and tracing to pthread_mutex.cpp.

bionic_systrace.h contains an implementation of tracing that
can be used with systrace.py and its associated viewer.  pthread_mutex
now uses this tracing to track pthread_mutex contention, which can be
enabled by using the "bionic" command line option to systrace.

Bug: 15116468

(cherry picked from commit a406ee6d5f616192e9a13afad6ac6a9969814fc1)

Change-Id: Ic98fc303689fe9384974150d0d258c50806a55e4