src/share/vm/memory/generation.hpp

*** 453,462 ****
--- 453,463 ----
    // garbage collectors. A NULL value indicates to the client that
    // no data recording is expected by the provider. The data-recorder is
    // expected to be GC worker thread-local, with the worker index
    // indicated by "thr_num".
    virtual void* get_data_recorder(int thr_num) { return NULL; }
+   virtual void sample_eden_chunk() {}
  
    // Some generations may require some cleanup actions before allowing
    // a verification.
    virtual void prepare_for_verify() {};