- Optimized CopyFixedArray and CopyJSObject.

src/objects-inl.h

 // Copyright 2006-2008 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 577 matching lines @@
 Failure* Failure::OutOfMemoryException() {
   return Construct(OUT_OF_MEMORY_EXCEPTION);
 }
 
 
 int Failure::value() const {
   return reinterpret_cast<int>(this) >> kFailureTagSize;
 }
 
 
+Failure* Failure::RetryAfterGC(int requested_bytes) {
+  int requested = requested_bytes >> kObjectAlignmentBits;
+  int value = (requested << kSpaceTagSize) | NEW_SPACE;
+  ASSERT(value >> kSpaceTagSize == requested);
+  ASSERT(Smi::IsValid(value));
+  ASSERT(value == ((value << kFailureTypeTagSize) >> kFailureTypeTagSize));
+  ASSERT(Smi::IsValid(value << kFailureTypeTagSize));
+  return Construct(RETRY_AFTER_GC, value);
+}
+
+
 Failure* Failure::Construct(Type type, int value) {
   int info = (value << kFailureTypeTagSize) | type;
   ASSERT(Smi::IsValid(info));  // Same validation check as in Smi
   return reinterpret_cast<Failure*>((info << kFailureTagSize) | kFailureTag);
 }
 
 
 bool Smi::IsValid(int value) {
 #ifdef DEBUG
   bool in_range = (value >= kMinValue) && (value <= kMaxValue);
@@ skipping 176 matching lines @@
   v->VisitPointers(reinterpret_cast<Object**>(FIELD_ADDR(this, start)),
                    reinterpret_cast<Object**>(FIELD_ADDR(this, end)));
 }
 
 
 void HeapObject::IteratePointer(ObjectVisitor* v, int offset) {
   v->VisitPointer(reinterpret_cast<Object**>(FIELD_ADDR(this, offset)));
 }
 
 
-void HeapObject::CopyBody(JSObject* from) {
-  ASSERT(map() == from->map());
-  ASSERT(Size() == from->Size());
-  int object_size = Size();
-  for (int offset = kHeaderSize;
-       offset < object_size;
-       offset += kPointerSize) {
-    Object* value = READ_FIELD(from, offset);
-    // Note: WRITE_FIELD does not update the write barrier.
-    WRITE_FIELD(this, offset, value);
-    WRITE_BARRIER(this, offset);
-  }
-}
-
-
 bool HeapObject::IsMarked() {
   return map_word().IsMarked();
 }
 
 
 void HeapObject::SetMark() {
   ASSERT(!IsMarked());
   MapWord first_word = map_word();
   first_word.SetMark();
   set_map_word(first_word);
@@ skipping 137 matching lines @@
     WRITE_BARRIER(this, offset);
   } else {
     ASSERT(index < properties()->length());
     properties()->set(index, value);
   }
   return value;
 }
 
 
 void JSObject::InitializeBody(int object_size) {
+  Object* value = Heap::undefined_value();
   for (int offset = kHeaderSize; offset < object_size; offset += kPointerSize) {
-    WRITE_FIELD(this, offset, Heap::undefined_value());
+    WRITE_FIELD(this, offset, value);
   }
 }
 
 
 void Struct::InitializeBody(int object_size) {
+  Object* value = Heap::undefined_value();
   for (int offset = kHeaderSize; offset < object_size; offset += kPointerSize) {
-    WRITE_FIELD(this, offset, Heap::undefined_value());
+    WRITE_FIELD(this, offset, value);
   }
 }
 
 
 bool JSObject::HasFastProperties() {
   return !properties()->IsDictionary();
 }
 
 
 bool Array::IndexFromObject(Object* object, uint32_t* index) {
@@ skipping 1349 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_