--- /dev/null	2019-02-13 16:01:02.292000000 +0300
+++ new/src/share/vm/jfr/support/jfrKlassExtension.hpp	2019-02-15 19:03:27.365092083 +0300
@@ -0,0 +1,42 @@
+/*
+* Copyright (c) 2012, 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_SUPPORT_JFRKLASSEXTENSION_HPP
+#define SHARE_VM_JFR_SUPPORT_JFRKLASSEXTENSION_HPP
+
+#include "jfr/instrumentation/jfrEventClassTransformer.hpp"
+#include "jfr/support/jfrTraceIdExtension.hpp"
+
+#define DEFINE_KLASS_TRACE_ID_OFFSET \
+  static ByteSize trace_id_offset() { return in_ByteSize(offset_of(InstanceKlass, _trace_id)); }
+
+#define KLASS_TRACE_ID_OFFSET InstanceKlass::trace_id_offset()
+
+#define JDK_JFR_EVENT_SUBKLASS 16
+#define JDK_JFR_EVENT_KLASS    32
+#define EVENT_HOST_KLASS       64
+#define IS_EVENT_KLASS(ptr) (((ptr)->trace_id() & (JDK_JFR_EVENT_KLASS | JDK_JFR_EVENT_SUBKLASS)) != 0)
+#define ON_KLASS_CREATION(k, p, t) if (IS_EVENT_KLASS(k)) JfrEventClassTransformer::on_klass_creation(k, p, t)
+
+#endif // SHARE_VM_JFR_SUPPORT_JFRKLASSEXTENSION_HPP