Separate Cell and PropertyCell spaces

src/spaces.h

 // Copyright 2011 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 2608 matching lines @@
   }
 
   const int max_map_space_pages_;
 
  public:
   TRACK_MEMORY("MapSpace")
 };
 
 
 // -----------------------------------------------------------------------------
+// Old space for simple property cell objects
+
+class CellSpace : public FixedSpace {
+ public:
+  // Creates a property cell space object with a maximum capacity.
+  CellSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id)
+      : FixedSpace(heap, max_capacity, id, Cell::kSize)
+  {}
+
+  virtual int RoundSizeDownToObjectAlignment(int size) {
+    if (IsPowerOf2(Cell::kSize)) {
+      return RoundDown(size, Cell::kSize);
+    } else {
+      return (size / Cell::kSize) * Cell::kSize;
+    }
+  }
+
+ protected:
+  virtual void VerifyObject(HeapObject* obj);
+
+ public:
+  TRACK_MEMORY("CellSpace")
+};
+
+
+// -----------------------------------------------------------------------------
 // Old space for all global object property cell objects
 
-class CellSpace : public FixedSpace {
+class PropertyCellSpace : public FixedSpace {
  public:
   // Creates a property cell space object with a maximum capacity.
-  CellSpace(Heap* heap, intptr_t max_capacity, AllocationSpace id)
+  PropertyCellSpace(Heap* heap, intptr_t max_capacity,
+                    AllocationSpace id)
       : FixedSpace(heap, max_capacity, id, JSGlobalPropertyCell::kSize)
   {}
 
   virtual int RoundSizeDownToObjectAlignment(int size) {
     if (IsPowerOf2(JSGlobalPropertyCell::kSize)) {
       return RoundDown(size, JSGlobalPropertyCell::kSize);
     } else {
       return (size / JSGlobalPropertyCell::kSize) * JSGlobalPropertyCell::kSize;
     }
   }
 
  protected:
   virtual void VerifyObject(HeapObject* obj);
 
  public:
-  TRACK_MEMORY("CellSpace")
+  TRACK_MEMORY("PropertyCellSpace")
 };
 
 
 // -----------------------------------------------------------------------------
 // Large objects ( > Page::kMaxHeapObjectSize ) are allocated and managed by
 // the large object space. A large object is allocated from OS heap with
 // extra padding bytes (Page::kPageSize + Page::kObjectStartOffset).
 // A large object always starts at Page::kObjectStartOffset to a page.
 // Large objects do not move during garbage collections.
 
@@ skipping 184 matching lines @@
   }
   // Must be small, since an iteration is used for lookup.
   static const int kMaxComments = 64;
 };
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SPACES_H_