Various improvements to oom_dump and instance type lists.

src/heap.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 1305 matching lines @@
 
   friend class Factory;
   friend class DisallowAllocationFailure;
   friend class AlwaysAllocateScope;
   friend class LinearAllocationScope;
 };
 
 
 class HeapStats {
  public:
+  static const int kStartMarker = 0xDECADE00;
+  static const int kEndMarker = 0xDECADE01;
+
   int* start_marker;                    //  0
   int* new_space_size;                  //  1
   int* new_space_capacity;              //  2
   int* old_pointer_space_size;          //  3
   int* old_pointer_space_capacity;      //  4
   int* old_data_space_size;             //  5
   int* old_data_space_capacity;         //  6
   int* code_space_size;                 //  7
   int* code_space_capacity;             //  8
   int* map_space_size;                  //  9
@@ skipping 644 matching lines @@
 
   // To speed up scavenge collections new space string are kept
   // separate from old space strings.
   static List<Object*> new_space_strings_;
   static List<Object*> old_space_strings_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_