src/share/vm/memory/allocation.cpp

*** 444,461 ****
--- 444,463 ----
    size_t round_size = (sizeof (char *)) - 1;
    init_size = (init_size+round_size) & ~round_size;
    _first = _chunk = new (AllocFailStrategy::EXIT_OOM, init_size) Chunk(init_size);
    _hwm = _chunk->bottom();      // Save the cached hwm, max
    _max = _chunk->top();
+   _size_in_bytes = 0;
    set_size_in_bytes(init_size);
    NOT_PRODUCT(Atomic::inc(&_instance_count);)
  }
  
  Arena::Arena() {
    _first = _chunk = new (AllocFailStrategy::EXIT_OOM, Chunk::init_size) Chunk(Chunk::init_size);
    _hwm = _chunk->bottom();      // Save the cached hwm, max
    _max = _chunk->top();
+   _size_in_bytes = 0;
    set_size_in_bytes(Chunk::init_size);
    NOT_PRODUCT(Atomic::inc(&_instance_count);)
  }
  
  Arena *Arena::move_contents(Arena *copy) {