diff -r bbb498ccb4ac -r 26e3035cdffc src/Array.h
--- a/src/Array.h	Sat Dec 22 23:18:57 2012 -0800
+++ b/src/Array.h	Mon Dec 24 02:49:20 2012 -0800
@@ -48,7 +48,7 @@
 
   public:
     static Array *NewFixed(Zone *zone, Handle<ArrayMap> map, Heap::Tenure = Heap::Tenure_Default);
-    static Array *NewString(Zone *zone, Handle<ArrayMap> map, Address buffer, size_t length, Heap::Tenure = Heap::Tenure_Default);
+    static Array *NewString(Zone *zone, Handle<ArrayMap> map, char *buffer, size_t length, Heap::Tenure = Heap::Tenure_Default);
     static Array *NewSized(Zone *zone, Handle<ArrayMap> map, int sizes[MAX_ARRAY_DEPTH], Heap::Tenure = Heap::Tenure_Default);
 
     static Array *New1D(Zone *zone, Handle<ArrayMap> map, uint32 elements, Heap::Tenure tenure = Heap::Tenure_Default);
@@ -61,6 +61,15 @@
                               unsigned length,
                               Heap::Tenure tenure = Heap::Tenure_Default);
 
+    // Copies an array from one reference to another, obeying language semantics.
+    static bool ShallowCopy(Zone *zone, Handle<Array> dest, Handle<Array> source);
+
+    // Creates a full duplicate of an array, following all array references as if
+    // they were fixed. Array references inside structs or objects use ShallowCopy
+    // semantics, as this is only intended for duplicating array literals, which
+    // cannot contain structs.
+    static Array *DeepCopy(Zone *zone, Handle<Array> source, Heap::Tenure tenure);
+
     uint32 length() {
         return length_;
     }
@@ -72,6 +81,7 @@
     inline char *chars();
     inline void *bytes();
 
+    bool resize(Zone *zone, size_t newLength);
 
     static inline size_t SizeForElement(ArrayType *type) {
         if (type->contained()->isTraceable())