Implement zone-allocated types

src/objects.cc

 // Copyright 2013 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 7821 matching lines @@
   { MaybeObject* maybe_obj = key.AsObject(GetHeap());
     if (!maybe_obj->ToObject(&obj)) return maybe_obj;
   }
   cache->set(EntryToIndex(entry), obj);
   cache->set(EntryToIndex(entry) + 1, code);
   cache->ElementAdded();
   return cache;
 }
 
 
+void FixedArray::Shrink(int new_length) {
+  ASSERT(new_length <= length());
+  if (new_length < length()) {
+    RightTrimFixedArray<FROM_MUTATOR>(GetHeap(), this, length() - new_length);
+  }
+}
+
+
 MaybeObject* FixedArray::AddKeysFromJSArray(JSArray* array) {
   ElementsAccessor* accessor = array->GetElementsAccessor();
   MaybeObject* maybe_result =
       accessor->AddElementsToFixedArray(array, array, this);
   FixedArray* result;
   if (!maybe_result->To<FixedArray>(&result)) return maybe_result;
 #ifdef ENABLE_SLOW_ASSERTS
   if (FLAG_enable_slow_asserts) {
     for (int i = 0; i < result->length(); i++) {
       Object* current = result->get(i);
@@ skipping 8810 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal