Allocate filler objects in the factory.

src/heap.cc

 // Copyright 2012 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 2390 matching lines @@
   map->set_bit_field2(1 << Map::kIsExtensible);
   int bit_field3 = Map::EnumLengthBits::encode(kInvalidEnumCacheSentinel) |
                    Map::OwnsDescriptors::encode(true);
   map->set_bit_field3(bit_field3);
   map->set_elements_kind(elements_kind);
 
   return map;
 }
 
 
+MaybeObject* Heap::AllocateFillerObject(int size,
+                                        bool double_align,
+                                        AllocationSpace space) {
+  HeapObject* allocation;
+  { MaybeObject* maybe_allocation = AllocateRaw(size, space, space);
+    if (!maybe_allocation->To(&allocation)) return maybe_allocation;
+  }
+#ifdef DEBUG
+  MemoryChunk* chunk = MemoryChunk::FromAddress(allocation->address());
+  ASSERT(chunk->owner()->identity() == space);
+#endif
+  CreateFillerObjectAt(allocation->address(), size);
+  return allocation;
+}
+
+
 MaybeObject* Heap::AllocatePolymorphicCodeCache() {
   return AllocateStruct(POLYMORPHIC_CODE_CACHE_TYPE);
 }
 
 
 const Heap::StringTypeTable Heap::string_type_table[] = {
 #define STRING_TYPE_ELEMENT(type, size, name, camel_name)                      \
   {type, size, k##camel_name##MapRootIndex},
   STRING_TYPE_LIST(STRING_TYPE_ELEMENT)
 #undef STRING_TYPE_ELEMENT
@@ skipping 4293 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 } }  // namespace v8::internal