Provide baseline for experimental GC implementation.

src/spaces.cc

 // 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 2763 matching lines @@
 }
 #endif
 
 
 // -----------------------------------------------------------------------------
 // MapSpace implementation
 
 void MapSpace::PrepareForMarkCompact(bool will_compact) {
   // Call prepare of the super class.
   FixedSpace::PrepareForMarkCompact(will_compact);
-
-  if (will_compact) {
-    // Initialize map index entry.
-    int page_count = 0;
-    PageIterator it(this, PageIterator::ALL_PAGES);
-    while (it.has_next()) {
-      ASSERT_MAP_PAGE_INDEX(page_count);
-
-      Page* p = it.next();
-      ASSERT(p->mc_page_index == page_count);
-
-      page_addresses_[page_count++] = p->address();
-    }
-  }
 }
 
 
 #ifdef DEBUG
 void MapSpace::VerifyObject(HeapObject* object) {
   // The object should be a map or a free-list node.
   ASSERT(object->IsMap() || object->IsByteArray());
 }
 #endif
 
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   for (HeapObject* obj = obj_it.next(); obj != NULL; obj = obj_it.next()) {
     if (obj->IsCode()) {
       Code* code = Code::cast(obj);
       code_kind_statistics[code->kind()] += code->Size();
     }
   }
 }
 #endif  // DEBUG
 
 } }  // namespace v8::internal