--- /dev/null	2019-01-28 17:45:32.000000000 +0800
+++ new/src/share/vm/jfr/jfr.cpp	2019-01-28 17:45:32.000000000 +0800
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2019, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "jfr/jfr.hpp"
+#include "jfr/recorder/access/jfrThreadData.hpp"
+#include "jfr/recorder/jfrRecorder.hpp"
+#include "jfr/recorder/checkpoint/jfrCheckpointManager.hpp"
+#include "jfr/recorder/repository/jfrEmergencyDump.hpp"
+
+bool Jfr::is_enabled() {
+  return JfrRecorder::is_enabled();
+}
+
+bool Jfr::is_disabled() {
+  return JfrRecorder::is_disabled();
+}
+
+bool Jfr::is_recording() {
+  return JfrRecorder::is_recording();
+}
+
+jint Jfr::on_vm_init() {
+  return JfrRecorder::on_vm_init() ? JNI_OK : JNI_ERR;
+}
+
+jint Jfr::on_vm_start() {
+  return JfrRecorder::on_vm_start() ? JNI_OK : JNI_ERR;
+}
+
+void Jfr::on_unloading_classes() {
+  if (JfrRecorder::is_created()) {
+    JfrCheckpointManager::write_constant_tag_set_for_unloaded_classes();
+  }
+}
+
+void Jfr::on_thread_exit(JavaThread* thread) {
+  if (JfrRecorder::is_recording()) {
+    JfrThreadData::on_exit(thread);
+  }
+}
+
+void Jfr::on_thread_destruct(Thread* thread) {
+  if (JfrRecorder::is_created()) {
+    JfrThreadData::on_destruct(thread);
+  }
+}
+
+void Jfr::on_vm_shutdown(bool exception_handler) {
+  if (JfrRecorder::is_recording()) {
+    JfrEmergencyDump::on_vm_shutdown(exception_handler);
+  }
+}