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

1 files changed, 16 insertions, 8 deletions

diff --git a/runtime/mirror/object_array.h b/runtime/mirror/object_array.h
index 5da8845196..347494e2ab 100644
--- a/runtime/mirror/object_array.h
+++ b/runtime/mirror/object_array.h
@@ -33,7 +33,7 @@ class MANAGED ObjectArray : public Array {
   static ObjectArray<T>* Alloc(Thread* self, Class* object_array_class, int32_t length)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  T* Get(int32_t i) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  T* Get(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   // Returns true if the object can be stored into the array. If not, throws
   // an ArrayStoreException and returns false.
@@ -44,22 +44,30 @@ class MANAGED ObjectArray : public Array {
   // Set element without bound and element type checks, to be used in limited
   // circumstances, such as during boot image writing
   void SetWithoutChecks(int32_t i, T* object) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  void SetWithoutChecksAndWriteBarrier(int32_t i, T* object)
+      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+
+  T* GetWithoutChecks(int32_t i) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  // Set element without bound and element type checks, to be used in limited circumstances, such
-  // as during boot image writing. Does not do write barrier.
-  void SetPtrWithoutChecks(int32_t i, T* object) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  // Copy src into this array (dealing with overlaps as memmove does) without assignability checks.
+  void AssignableMemmove(int32_t dst_pos, ObjectArray<T>* src, int32_t src_pos,
+                         int32_t count) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  T* GetWithoutChecks(int32_t i) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  // Copy src into this array assuming no overlap and without assignability checks.
+  void AssignableMemcpy(int32_t dst_pos, ObjectArray<T>* src, int32_t src_pos,
+                        int32_t count) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  static void Copy(const ObjectArray<T>* src, int src_pos,
-                   ObjectArray<T>* dst, int dst_pos,
-                   size_t length)
+  // Copy src into this array with assignability checks.
+  void AssignableCheckingMemcpy(int32_t dst_pos, ObjectArray<T>* src, int32_t src_pos,
+                                int32_t count, bool throw_exception)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   ObjectArray<T>* CopyOf(Thread* self, int32_t new_length)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
  private:
+  static MemberOffset OffsetOfElement(int32_t i);
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectArray);
 };