Handlify Map::SetPrototype()

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 6069 matching lines @@
   // properties.
   inline void set_is_access_check_needed(bool access_check_needed);
   inline bool is_access_check_needed();
 
   // Returns true if map has a non-empty stub code cache.
   inline bool has_code_cache();
 
   // [prototype]: implicit prototype object.
   DECL_ACCESSORS(prototype, Object)
   // TODO(jkummerow): make set_prototype private.
-  void SetPrototype(Handle<Object> prototype,
-                    PrototypeOptimizationMode proto_mode = FAST_PROTOTYPE);
-  bool ShouldRegisterAsPrototypeUser(Handle<JSObject> prototype);
+  static void SetPrototype(
+      Handle<Map> map, Handle<Object> prototype,
+      PrototypeOptimizationMode proto_mode = FAST_PROTOTYPE);
+  static bool ShouldRegisterAsPrototypeUser(Handle<Map> map,
+                                            Handle<JSObject> prototype);
   bool CanUseOptimizationsBasedOnPrototypeRegistry();
 
   // [constructor]: points back to the function responsible for this map.
   // The field overlaps with the back pointer. All maps in a transition tree
   // have the same constructor, so maps with back pointers can walk the
   // back pointer chain until they find the map holding their constructor.
   DECL_ACCESSORS(constructor_or_backpointer, Object)
   inline Object* GetConstructor() const;
   inline void SetConstructor(Object* constructor,
                              WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
@@ skipping 273 matching lines @@
 
   // Layout description.
   static const int kInstanceSizesOffset = HeapObject::kHeaderSize;
   static const int kInstanceAttributesOffset = kInstanceSizesOffset + kIntSize;
   static const int kBitField3Offset = kInstanceAttributesOffset + kIntSize;
   static const int kPrototypeOffset = kBitField3Offset + kPointerSize;
   static const int kConstructorOrBackPointerOffset =
       kPrototypeOffset + kPointerSize;
   // When there is only one transition, it is stored directly in this field;
   // otherwise a transition array is used.
-  // For prototype maps, this slot is used to store a pointer to the prototype
-  // object using this map.
+  // For prototype maps, this slot is used to store this map's PrototypeInfo
+  // struct.
   static const int kTransitionsOrPrototypeInfoOffset =
       kConstructorOrBackPointerOffset + kPointerSize;
   static const int kDescriptorsOffset =
       kTransitionsOrPrototypeInfoOffset + kPointerSize;
 #if V8_DOUBLE_FIELDS_UNBOXING
   static const int kLayoutDecriptorOffset = kDescriptorsOffset + kPointerSize;
   static const int kCodeCacheOffset = kLayoutDecriptorOffset + kPointerSize;
 #else
   static const int kLayoutDecriptorOffset = 1;  // Must not be ever accessed.
   static const int kCodeCacheOffset = kDescriptorsOffset + kPointerSize;
@@ skipping 4676 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_