--- old/src/hotspot/share/gc/shared/objectCountEventSender.hpp	2018-04-09 14:13:34.170337923 +0200
+++ new/src/hotspot/share/gc/shared/objectCountEventSender.hpp	2018-04-09 14:13:33.432291365 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018, 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
@@ -27,15 +27,32 @@
 
 #include "gc/shared/gcTrace.hpp"
 #include "memory/allocation.hpp"
+#include "utilities/globalDefinitions.hpp"
 #include "utilities/macros.hpp"
+#include "utilities/ticks.hpp"
 
 #if INCLUDE_SERVICES
 
 class KlassInfoEntry;
-class Ticks;
+class Klass;
 
 class ObjectCountEventSender : public AllStatic {
+  static bool _should_send_requestable_event;
+
+  template <typename T>
+  static void send_event_if_enabled(Klass* klass, jlong count, julong size, const Ticks& timestamp);
+
+ public:
+  static void enable_requestable_event();
+  static void disable_requestable_event();
+
  public:
+  // The following two functions have the exact same signature as
+  // hotspot/src/share/vm/gc_implementation/shared/objectCountEventSender.hpp
+  //
+  // This file will replace the open file if a closed build is performed.
+  // These function signatures can therefore not be changed if the open
+  // signatures aren't changed as well.
   static void send(const KlassInfoEntry* entry, const Ticks& timestamp);
   static bool should_send_event();
 };