--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/src/hotspot/share/jfr/recorder/checkpoint/constant/jfrConstant.hpp	2018-04-09 14:58:31.203798196 +0200
@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2016, 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_CHECKPOINT_CONSTANT_JFRCONSTANT_HPP
+#define SHARE_VM_JFR_CHECKPOINT_CONSTANT_JFRCONSTANT_HPP
+
+#include "jfr/metadata/jfrConstantSerializer.hpp"
+
+class JfrThreadConstantSet : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class JfrThreadGroupConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class ClassUnloadConstantSet : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class FlagValueOriginConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class MonitorInflateCauseConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class GCCauseConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class GCNameConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class GCWhenConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class G1HeapRegionTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class GCThresholdUpdaterConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class MetadataTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class MetaspaceObjTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class G1YCTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class ReferenceTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class NarrowOopModeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class CompilerPhaseTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class CodeBlobTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class VMOperationTypeConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class ConstantSet : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class ThreadStateConstant : public JfrConstantSerializer {
+ public:
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+class JfrThreadConstant : public JfrConstantSerializer {
+ private:
+  JavaThread* _thread;
+ public:
+  JfrThreadConstant(JavaThread* jt) : _thread(jt) {}
+  void write_constants(JfrCheckpointWriter& writer);
+};
+
+#endif // SHARE_VM_JFR_CHECKPOINT_CONSTANT_JFRCONSTANT_HPP