tree 7b9812d782c0525623b4523e7612893f84e376c5
parent f4009e2249172ae8fe0e772ac8c0107400a28d6d
author Mathieu Chartier <mathieuc@google.com> 1407446787 -0700
committer Mathieu Chartier <mathieuc@google.com> 1407449927 -0700

Guard pause histogram with lock.

There is a race condition since the GC was updating this without
holding any locks. But the signal catcher could be dumping the
timings with DumpGcPerformanceInfo at the same time. This could
potentially cause out of bound errors, etc..

Also did a bit of cleanup.

Bug: 15446488
Change-Id: Icaff19d872cc7f7d31c34e4ddaae97502454e09c