tree ebeab83820aaae0761a52de2e3ac8c83f68757f5
parent 39a548933c7d083647ccb1d508240198ffff5a5c
author Mathieu Chartier <mathieuc@google.com> 1391190913 -0800
committer Mathieu Chartier <mathieuc@google.com> 1391209160 -0800

Fix race conditions caused by StartGC.

Race1: Heap trimming could happen when we were transitioning the heap.
This caused the space to get deleted in the middle of the trim.

Race2: IncrementDisableCompactingGC needed to WaitForConcurrentGC if
we were running a moving GC or about to starting a moving GC.

Race3: The logic for whether or not we had a compacting GC was
calculated before StartGC in CollectGarbageInternal. This could cause
us to get blocked waiting for the GC to complete and come out of the
wait with a new collector_type_ due to a heap transition.

Change-Id: I07c36ae5df1820e9cca70cf239e46175c1eb9575