- Optimized CopyFixedArray and CopyJSObject.

src/objects.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 794 matching lines @@
   inline AllocationSpace allocation_space() const;
 
   // Returns the number of bytes requested (up to the representable maximum)
   // for RetryAfterGC failures.
   inline int requested() const;
 
   inline bool IsInternalError() const;
   inline bool IsOutOfMemoryException() const;
 
   static Failure* RetryAfterGC(int requested_bytes, AllocationSpace space);
+  static inline Failure* RetryAfterGC(int requested_bytes);  // NEW_SPACE

[Kasper Lund, 2008/10/22 08:17:21]

How about renaming this to avoid the overloading? Something like
RetryAfterNewSpaceGC might do the trick? Then you could also get rid of the
comment.

   static inline Failure* Exception();
   static inline Failure* InternalError();
   static inline Failure* OutOfMemoryException();
   // Casting.
   static inline Failure* cast(Object* object);
 
   // Dispatched behavior.
   void FailurePrint();
   void FailurePrint(StringStream* accumulator);
 #ifdef DEBUG
@@ skipping 164 matching lines @@
   // Iterates over all pointers contained in the object except the
   // first map pointer.  The object type is given in the first
   // parameter. This function does not access the map pointer in the
   // object, and so is safe to call while the map pointer is modified.
   void IterateBody(InstanceType type, int object_size, ObjectVisitor* v);
 
   // This method only applies to struct objects.  Iterates over all the fields
   // of this struct.
   void IterateStructBody(int object_size, ObjectVisitor* v);
 
-  // Copy the body from the 'from' object to this.
-  // Please note the two object must have the same map prior to the call.
-  inline void CopyBody(JSObject* from);
-
   // Returns the heap object's size in bytes
   inline int Size();
 
   // Given a heap object's map pointer, returns the heap size in bytes
   // Useful when the map pointer field is used for other purposes.
   // GC internal.
   inline int SizeFromMap(Map* map);
 
   // Support for the marking heap objects during the marking phase of GC.
   // True if the object is marked live.
@@ skipping 233 matching lines @@
   Object* SetElementsLength(Object* length);
 
   // Get the header size for a JSObject.  Used to compute the index of
   // internal fields as well as the number of internal fields.
   inline int GetHeaderSize();
 
   inline int GetInternalFieldCount();
   inline Object* GetInternalField(int index);
   inline void SetInternalField(int index, Object* value);
 
-  // Returns a deep copy of the JavaScript object.
-  // Properties and elements are copied too.
-  // Returns failure if allocation failed.
-  Object* Copy(PretenureFlag pretenure = NOT_TENURED);
-
   // Lookup a property.  If found, the result is valid and has
   // detailed information.
   void LocalLookup(String* name, LookupResult* result);
   void Lookup(String* name, LookupResult* result);
 
   // The following lookup functions skip interceptors.
   void LocalLookupRealNamedProperty(String* name, LookupResult* result);
   void LookupRealNamedProperty(String* name, LookupResult* result);
   void LookupRealNamedPropertyInPrototypes(String* name, LookupResult* result);
   void LookupCallbackSetterInPrototypes(String* name, LookupResult* result);
@@ skipping 2785 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_