In-heap small typed arrays

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6000 matching lines @@
   ENTER_V8(i_isolate);
   i::Handle<i::JSArrayBuffer> obj =
       i_isolate->factory()->NewJSArrayBuffer();
   i::Runtime::SetupArrayBuffer(i_isolate, obj, true, data, byte_length);
   return Utils::ToLocal(obj);
 }
 
 
 Local<ArrayBuffer> v8::ArrayBufferView::Buffer() {
   i::Handle<i::JSArrayBufferView> obj = Utils::OpenHandle(this);
-  ASSERT(obj->buffer()->IsJSArrayBuffer());
-  i::Handle<i::JSArrayBuffer> buffer(i::JSArrayBuffer::cast(obj->buffer()));
+  i::Handle<i::JSArrayBuffer> buffer;
+  if (obj->IsJSDataView()) {
+    i::Handle<i::JSDataView> data_view(i::JSDataView::cast(*obj));
+    ASSERT(data_view->buffer()->IsJSArrayBuffer());
+    buffer = i::handle(i::JSArrayBuffer::cast(data_view->buffer()));
+  } else {
+    ASSERT(obj->IsJSTypedArray());
+    buffer = i::JSTypedArray::cast(*obj)->GetBuffer();
+  }
   return Utils::ToLocal(buffer);
 }
 
 
 size_t v8::ArrayBufferView::ByteOffset() {
   i::Handle<i::JSArrayBufferView> obj = Utils::OpenHandle(this);
   return static_cast<size_t>(obj->byte_offset()->Number());
 }
 
 
@@ skipping 50 matching lines @@
       isolate, obj, buffer, byte_offset, byte_length);
 
   i::Handle<i::Object> length_object =
       isolate->factory()->NewNumberFromSize(length);
   obj->set_length(*length_object);
 
   i::Handle<i::ExternalArray> elements =
       isolate->factory()->NewExternalArray(
           static_cast<int>(length), array_type,
           static_cast<uint8_t*>(buffer->backing_store()) + byte_offset);
-  obj->set_elements(*elements);
+  i::Handle<i::Map> map =
+      i::JSObject::GetElementsTransitionMap(obj, elements_kind);
+  obj->set_map_and_elements(*map, *elements);
   return obj;
 }
 
 
 #define TYPED_ARRAY_NEW(Type, type, TYPE, ctype, size)                       \
   Local<Type##Array> Type##Array::New(Handle<ArrayBuffer> array_buffer,      \
                                     size_t byte_offset, size_t length) {     \
     i::Isolate* isolate = i::Isolate::Current();                             \
     EnsureInitializedForIsolate(isolate,                                     \
         "v8::" #Type "Array::New(Handle<ArrayBuffer>, size_t, size_t)");     \
@@ skipping 1531 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal