src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp

*** 734,743 ****
--- 734,745 ----
    HeapWord** _top_addr;    // ... Top of Eden
    HeapWord** _end_addr;    // ... End of Eden
    HeapWord** _eden_chunk_array; // ... Eden partitioning array
    size_t     _eden_chunk_index; // ... top (exclusive) of array
    size_t     _eden_chunk_capacity;  // ... max entries in array
+   // This is meant to be a boolean flag, but jbyte for CAS.
+   jbyte      _eden_chunk_sampling_active;
  
    // Support for parallelizing survivor space rescan
    HeapWord** _survivor_chunk_array;
    size_t     _survivor_chunk_index;
    size_t     _survivor_chunk_capacity;
*** 928,937 ****
--- 930,940 ----
      }
    }
  
    // Support for parallel remark of survivor space
    void* get_data_recorder(int thr_num);
+   void sample_eden_chunk();
  
    CMSBitMap* markBitMap()  { return &_markBitMap; }
    void directAllocated(HeapWord* start, size_t size);
  
    // main CMS steps and related support
*** 1005,1014 ****
--- 1008,1019 ----
    CMSMarkStack* verification_mark_stack() { return &_markStack; }
    CMSBitMap*    verification_mark_bm()    { return &_verification_mark_bm; }
  
    // Initialization errors
    bool completed_initialization() { return _completed_initialization; }
+ 
+   void print_eden_and_survivor_chunk_arrays();
  };
  
  class CMSExpansionCause : public AllStatic  {
   public:
    enum Cause {
*** 1296,1305 ****
--- 1301,1314 ----
    // Support for parallel remark of survivor space
    void* get_data_recorder(int thr_num) {
      //Delegate to collector
      return collector()->get_data_recorder(thr_num);
    }
+   void sample_eden_chunk() {
+     //Delegate to collector
+     return collector()->sample_eden_chunk();
+   }
  
    // Printing
    const char* name() const;
    virtual const char* short_name() const { return "CMS"; }
    void        print() const;