Merging scavenge into sweeping phase of mark-sweep(-compact) collector.

src/mark-compact.h

 // Copyright 2006-2008 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 389 matching lines @@
 
   // Rebuild remembered set in old and map spaces.
   static void RebuildRSets();
 
 #ifdef DEBUG
   // -----------------------------------------------------------------------
   // Debugging variables, functions and classes
   // Counters used for debugging the marking phase of mark-compact or
   // mark-sweep collection.
 
-  // Number of live objects in Heap::to_space_.
-  static int live_young_objects_;
+  // Size of live objects in Heap::to_space_.
+  static int live_young_objects_size_;
 
-  // Number of live objects in Heap::old_pointer_space_.
-  static int live_old_pointer_objects_;
+  // Size of live objects in Heap::old_pointer_space_.
+  static int live_old_pointer_objects_size_;
 
-  // Number of live objects in Heap::old_data_space_.
-  static int live_old_data_objects_;
+  // Size of live objects in Heap::old_data_space_.
+  static int live_old_data_objects_size_;
 
-  // Number of live objects in Heap::code_space_.
-  static int live_code_objects_;
+  // Size of live objects in Heap::code_space_.
+  static int live_code_objects_size_;
 
-  // Number of live objects in Heap::map_space_.
-  static int live_map_objects_;
+  // Size of live objects in Heap::map_space_.
+  static int live_map_objects_size_;
 
-  // Number of live objects in Heap::cell_space_.
-  static int live_cell_objects_;
+  // Size of live objects in Heap::cell_space_.
+  static int live_cell_objects_size_;
 
-  // Number of live objects in Heap::lo_space_.
-  static int live_lo_objects_;
+  // Size of live objects in Heap::lo_space_.
+  static int live_lo_objects_size_;
 
   // Number of live bytes in this collection.
   static int live_bytes_;
 
   friend class MarkObjectVisitor;
   static void VisitObject(HeapObject* obj);
 
   friend class UnmarkObjectVisitor;
   static void UnmarkObject(HeapObject* obj);
 #endif
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_