diff -r 7a2a740815b7 -r caf115bb98ad src/hotspot/share/jfr/jfr.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/jfr/jfr.hpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_JFR_JFR_HPP
+#define SHARE_VM_JFR_JFR_HPP
+
+#include "jni.h"
+#include "memory/allocation.hpp"
+
+class BoolObjectClosure;
+class JavaThread;
+class OopClosure;
+class Thread;
+
+extern "C" void JNICALL jfr_register_natives(JNIEnv*, jclass);
+
+//
+// The VM interface to Flight Recorder.
+//
+class Jfr : AllStatic {
+ public:
+  static bool is_enabled();
+  static bool is_disabled();
+  static bool is_recording();
+  static void on_vm_init();
+  static void on_vm_start();
+  static void on_unloading_classes();
+  static void on_thread_exit(JavaThread* thread);
+  static void on_thread_destruct(Thread* thread);
+  static void on_vm_shutdown(bool exception_handler = false);
+  static bool on_start_flight_recording_option(const JavaVMOption** option, char* tail);
+  static bool on_flight_recorder_option(const JavaVMOption** option, char* tail);
+  static void weak_oops_do(BoolObjectClosure* is_alive, OopClosure* f);
+  static Thread* sampler_thread();
+};
+
+#endif // SHARE_VM_JFR_JFR_HPP