tree 08924388d8a91759c8aa7acfc1bc53153605e4df
parent 4c489f48ef432126b8e7a84b61c1c13a7514c085
author Mathieu Chartier <mathieuc@google.com> 1468865505 -0700
committer Mathieu Chartier <mathieuc@google.com> 1468879347 -0700

Do allocation fence before pushing on allocation stack

Heap::VisitObjects relies on having valid classes for objects in
the allocation stack. If the writes reorder, the thread calling
VisitObjects could see the free list pointer instead of the class
of the object. I believe this is causing crashes in VisitObjects.

Bug: 28790624

Test: Volantis booted

Change-Id: I0f2d4097de1ef3f5caf670ecc977d4d6837872ca