src/hotspot/share/gc/shared/cardTable.hpp

*** 246,10 ***
--- 246,12 ---
    // This would be the 0th element of _byte_map, if the heap started at 0x0.
    // But since the heap starts at some higher address, this points to somewhere
    // before the beginning of the actual _byte_map.
    CardValue* byte_map_base() const { return _byte_map_base; }
    bool scanned_concurrently() const { return _scanned_concurrently; }
+   size_t byte_map_top_offset() const { return uintptr_t(_whole_heap.end()); }
+   size_t byte_map_bottom_offset() const { return uintptr_t(_whole_heap.start()); }
  
    virtual bool is_in_young(oop obj) const = 0;
  
    // Print a description of the memory for the card table
    virtual void print_on(outputStream* st) const;