Object model changes to support 64bit.

Modify mirror objects so that references between them use an ObjectReference
value type rather than an Object* so that functionality to compress larger
references can be captured in the ObjectRefererence implementation.
ObjectReferences are 32bit and all other aspects of object layout remain as
they are currently.

Expand fields in objects holding pointers so they can hold 64bit pointers. Its
expected the size of these will come down by improving where we hold compiler
meta-data.
Stub out x86_64 architecture specific runtime implementation.
Modify OutputStream so that reads and writes are of unsigned quantities.
Make the use of portable or quick code more explicit.
Templatize AtomicInteger to support more than just int32_t as a type.
Add missing, and fix issues relating to, missing annotalysis information on the
mutator lock.
Refactor and share implementations for array copy between System and uses
elsewhere in the runtime.
Fix numerous 64bit build issues.

Change-Id: I1a5694c251a42c9eff71084dfdd4b51fff716822
diff --git a/compiler/image_writer.h b/compiler/image_writer.h
index 695f59b..a1504ee 100644
--- a/compiler/image_writer.h
+++ b/compiler/image_writer.h
@@ -66,17 +66,17 @@
   void AssignImageOffset(mirror::Object* object) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
   void SetImageOffset(mirror::Object* object, size_t offset)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  bool IsImageOffsetAssigned(const mirror::Object* object) const;
-  size_t GetImageOffset(const mirror::Object* object) const;
+  bool IsImageOffsetAssigned(mirror::Object* object) const;
+  size_t GetImageOffset(mirror::Object* object) const;
 
-  mirror::Object* GetImageAddress(const mirror::Object* object) const {
+  mirror::Object* GetImageAddress(mirror::Object* object) const {
     if (object == NULL) {
       return NULL;
     }
     return reinterpret_cast<mirror::Object*>(image_begin_ + GetImageOffset(object));
   }
 
-  mirror::Object* GetLocalAddress(const mirror::Object* object) const {
+  mirror::Object* GetLocalAddress(mirror::Object* object) const {
     size_t offset = GetImageOffset(object);
     byte* dst = image_->Begin() + offset;
     return reinterpret_cast<mirror::Object*>(dst);
@@ -96,7 +96,7 @@
   }
 
   // Returns true if the class was in the original requested image classes list.
-  bool IsImageClass(const mirror::Class* klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  bool IsImageClass(mirror::Class* klass) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   // Debug aid that list of requested image classes.
   void DumpImageClasses();
@@ -141,20 +141,20 @@
   void CopyAndFixupObjects();
   static void CopyAndFixupObjectsCallback(mirror::Object* obj, void* arg)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupClass(const mirror::Class* orig, mirror::Class* copy)
+  void FixupClass(mirror::Class* orig, mirror::Class* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupMethod(const mirror::ArtMethod* orig, mirror::ArtMethod* copy)
+  void FixupMethod(mirror::ArtMethod* orig, mirror::ArtMethod* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupObject(const mirror::Object* orig, mirror::Object* copy)
+  void FixupObject(mirror::Object* orig, mirror::Object* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupObjectArray(const mirror::ObjectArray<mirror::Object>* orig,
+  void FixupObjectArray(mirror::ObjectArray<mirror::Object>* orig,
                         mirror::ObjectArray<mirror::Object>* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupInstanceFields(const mirror::Object* orig, mirror::Object* copy)
+  void FixupInstanceFields(mirror::Object* orig, mirror::Object* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupStaticFields(const mirror::Class* orig, mirror::Class* copy)
+  void FixupStaticFields(mirror::Class* orig, mirror::Class* copy)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
-  void FixupFields(const mirror::Object* orig, mirror::Object* copy, uint32_t ref_offsets,
+  void FixupFields(mirror::Object* orig, mirror::Object* copy, uint32_t ref_offsets,
                    bool is_static)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);