First steps towards implementing ArrayBuffer &co in V8

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 5c848800b37ab8ad90da48b05ba6c022db18f494..61e9101cc5daa4d1780a59a2aad2488b5bbd9f57 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -674,6 +674,7 @@ bool Object::IsBoolean() {
 
 
 TYPE_CHECKER(JSArray, JS_ARRAY_TYPE)
+TYPE_CHECKER(JSArrayBuffer, JS_ARRAY_BUFFER_TYPE)
 TYPE_CHECKER(JSRegExp, JS_REGEXP_TYPE)
 
 
@@ -1562,6 +1563,8 @@ int JSObject::GetHeaderSize() {
       return JSDate::kSize;
     case JS_ARRAY_TYPE:
       return JSArray::kSize;
+    case JS_ARRAY_BUFFER_TYPE:
+      return JSArrayBuffer::kSize;
     case JS_SET_TYPE:
       return JSSet::kSize;
     case JS_MAP_TYPE:
@@ -2448,6 +2451,7 @@ CAST_ACCESSOR(JSGlobalObject)
 CAST_ACCESSOR(JSBuiltinsObject)
 CAST_ACCESSOR(Code)
 CAST_ACCESSOR(JSArray)
+CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSRegExp)
 CAST_ACCESSOR(JSProxy)
 CAST_ACCESSOR(JSFunctionProxy)
@@ -5131,6 +5135,21 @@ bool Code::contains(byte* inner_pointer) {
 ACCESSORS(JSArray, length, Object, kLengthOffset)
 
 
+void* JSArrayBuffer::backing_store() {
+  intptr_t ptr = READ_INTPTR_FIELD(this, kBackingStoreOffset);
+  return reinterpret_cast<void*>(ptr);
+}
+
+
+void JSArrayBuffer::set_backing_store(void* value, WriteBarrierMode mode) {
+  intptr_t ptr = reinterpret_cast<intptr_t>(value);
+  WRITE_INTPTR_FIELD(this, kBackingStoreOffset, ptr);
+}
+
+
+ACCESSORS(JSArrayBuffer, byte_length, Object, kByteLengthOffset)
+
+
 ACCESSORS(JSRegExp, data, Object, kDataOffset)