tree 1ba6d026f6c9a47b9961c62511ab47c6d69314dd
parent 697726d42eaf804a1124c25dec58c2b0013a30e9
author Mathieu Chartier <mathieuc@google.com> 1400795017 -0700
committer Mathieu Chartier <mathieuc@google.com> 1400795017 -0700

Move SetMonitorEnterObject outside of blocked thread state change.

Race condition:
Thread is suspended in monitor kBlocked, GC decides to run the
checkpoint on it. The GC sees that the object is non null, and goes
to mark it, but then the thread does SetMonitorObject(nullptr).
Which causes a null object to be marked.

Change-Id: Ie8a5074112947ec07d01ccb813ca2c1bb9ac7066