--- old/src/hotspot/share/gc/shared/collectedHeap.hpp	2020-02-18 14:16:42.416513431 +0800
+++ new/src/hotspot/share/gc/shared/collectedHeap.hpp	2020-02-18 14:16:42.280515414 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -29,6 +29,7 @@
 #include "gc/shared/gcWhen.hpp"
 #include "gc/shared/verifyOption.hpp"
 #include "memory/allocation.hpp"
+#include "memory/heapInspection.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/perfData.hpp"
 #include "runtime/safepoint.hpp"
@@ -43,6 +44,7 @@
 // class defines the functions that a heap must implement, and contains
 // infrastructure common to all heaps.
 
+class AbstractGangTask;
 class AdaptiveSizePolicy;
 class BarrierSet;
 class GCHeapSummary;
@@ -386,6 +388,19 @@
   // Iterate over all objects, calling "cl.do_object" on each.
   virtual void object_iterate(ObjectClosure* cl) = 0;
 
+  // Run parallel heap inspection, return false as not supported by heap.
+  virtual bool run_par_heap_inspect_task(KlassInfoTable* cit,
+                                         BoolObjectClosure* filter,
+                                         size_t* missed_count,
+                                         size_t thread_num) {
+    return false;
+  }
+
+  // Parallel iterate over all objects, reture false if heap not support.
+  virtual bool object_iterate_try_parallel(AbstractGangTask *task, size_t thread_num) {
+    return false;
+  }
+
   // Keep alive an object that was loaded with AS_NO_KEEPALIVE.
   virtual void keep_alive(oop obj) {}