- Optimized CopyFixedArray and CopyJSObject.

src/heap.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 256 matching lines @@
   }
 
   // Allocates and initializes a new JavaScript object based on a
   // constructor.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
   static Object* AllocateJSObject(JSFunction* constructor,
                                   PretenureFlag pretenure = NOT_TENURED);
 
+  // Returns a deep copy of the JavaScript object.
+  // Properties and elements are copied too.
+  // Returns failure if allocation failed.
+  static Object* CopyJSObject(JSObject* source);
+
   // Allocates the function prototype.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
   static Object* AllocateFunctionPrototype(JSFunction* function);
 
   // Reinitialize an JSGlobalProxy based on a constructor.  The object
   // must have the same size as objects allocated using the
   // constructor.  The object is reinitialized and behaves as an
   // object that has been freshly allocated using the constructor.
@@ skipping 591 matching lines @@
 
   // Rebuild remembered set in an old space.
   static void RebuildRSets(PagedSpace* space);
 
   // Rebuild remembered set in the large object space.
   static void RebuildRSets(LargeObjectSpace* space);
 
   // Slow part of scavenge object.
   static void ScavengeObjectSlow(HeapObject** p, HeapObject* object);
 
+  // Copy memory from src to dst.
+  inline static void CopyBlock(Object** dst, Object** src, int byte_size);
+
   static const int kInitialSymbolTableSize = 2048;
   static const int kInitialEvalCacheSize = 64;
 
   friend class Factory;
   friend class DisallowAllocationFailure;
 };
 
 
 #ifdef DEBUG
 // Visitor class to verify interior pointers that do not have remembered set
@@ skipping 286 matching lines @@
   int marked_count_;
 
   // The count from the end of the previous full GC.  Will be zero if there
   // was no previous full GC.
   int previous_marked_count_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_