commit ad2541a59c00c2c69e8973088891a2b5257c9780
author Mathieu Chartier <mathieuc@google.com> Fri Oct 25 10:05:23 2013 -0700
committer Mathieu Chartier <mathieuc@google.com> Tue Oct 29 12:14:36 2013 -0700
tree 523898cf039c5185352978e71a54fa3a2657a04c
parent 9780099e445884d8bc9444c8c1261b02d80a26c7

Fix object identity hash.

The object identity hash is now stored in the monitor word after
being computed. Hashes are computed by a pseudo random number
generator.

When we write the image, we eagerly compute object hashes to
prevent pages getting dirtied.

Bug: 8981901

Change-Id: Ic8edacbacb0afc7055fd740a52444929f88ed564

runtime/runtime.h

diff --git a/runtime/runtime.h b/runtime/runtime.h
index b6429b6..77da098 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -331,7 +331,8 @@
 
   // Sweep system weaks, the system weak is deleted if the visitor return nullptr. Otherwise, the
   // system weak is updated to be the visitor's returned value.
-  void SweepSystemWeaks(RootVisitor* visitor, void* arg);
+  void SweepSystemWeaks(RootVisitor* visitor, void* arg)
+      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   // Returns a special method that calls into a trampoline for runtime method resolution
   mirror::ArtMethod* GetResolutionMethod() const {