Refactor the code cache to handle large number of properties on the global ob...

src/heap.cc

Index: src/heap.cc
===================================================================
--- src/heap.cc	(revision 3925)
+++ src/heap.cc	(working copy)
@@ -1206,7 +1206,7 @@
   map->set_inobject_properties(0);
   map->set_pre_allocated_property_fields(0);
   map->set_instance_descriptors(empty_descriptor_array());
-  map->set_code_cache(empty_fixed_array());
+  map->set_code_cache(undefined_value());
   map->set_unused_property_fields(0);
   map->set_bit_field(0);
   map->set_bit_field2(1 << Map::kIsExtensible);
@@ -1221,6 +1221,16 @@
 }
 
 
+Object* Heap::AllocateCodeCache() {
+  Object* result = AllocateStruct(CODE_CACHE_TYPE);
+  if (result->IsFailure()) return result;
+  CodeCache* code_cache = CodeCache::cast(result);
+  code_cache->set_default_cache(empty_fixed_array());
+  code_cache->set_normal_type_cache(undefined_value());
+  return code_cache;
+}
+
+
 const Heap::StringTypeTable Heap::string_type_table[] = {
 #define STRING_TYPE_ELEMENT(type, size, name, camel_name)                      \
   {type, size, k##camel_name##MapRootIndex},
@@ -1277,13 +1287,13 @@
 
   // Fix the instance_descriptors for the existing maps.
   meta_map()->set_instance_descriptors(empty_descriptor_array());
-  meta_map()->set_code_cache(empty_fixed_array());
+  meta_map()->set_code_cache(undefined_value());
 
   fixed_array_map()->set_instance_descriptors(empty_descriptor_array());
-  fixed_array_map()->set_code_cache(empty_fixed_array());
+  fixed_array_map()->set_code_cache(undefined_value());
 
   oddball_map()->set_instance_descriptors(empty_descriptor_array());
-  oddball_map()->set_code_cache(empty_fixed_array());
+  oddball_map()->set_code_cache(undefined_value());
 
   // Fix prototype object for existing maps.
   meta_map()->set_prototype(null_value());