--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2019-03-21 15:28:15.382607770 +0800
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2019-03-21 15:28:15.232612083 +0800
@@ -375,6 +375,8 @@
                                                          size_t size,
                                                          size_t translation_factor);
 
+  void trace_heap(GCWhen::Type when, GCTracer* tracer);
+
   double verify(bool guard, const char* msg);
   void verify_before_gc();
   void verify_after_gc();
@@ -1621,6 +1623,8 @@
   bool is_obj_dead_cond(const oop obj,
                         const VerifyOption vo) const;
 
+  G1HeapSummary create_g1_heap_summary();
+
   // Printing
 
   virtual void print_on(outputStream* st) const;