--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointBlob.hpp	2018-04-09 15:04:09.012096891 +0200
@@ -0,0 +1,59 @@
+/*
+ * 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_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP
+#define SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP
+
+#include "jfr/utilities/jfrAllocation.hpp"
+#include "jfr/utilities/jfrRefCountPointer.hpp"
+
+class JfrCheckpointBlob;
+class JfrCheckpointWriter;
+
+typedef RefCountPointer<JfrCheckpointBlob, MultiThreadedRefCounter> JfrCheckpointBlobReference;
+typedef RefCountHandle<JfrCheckpointBlobReference> JfrCheckpointBlobHandle;
+
+class JfrCheckpointBlob : public JfrCHeapObj {
+  template <typename, typename>
+  friend class RefCountPointer;
+ private:
+  const u1* _checkpoint;
+  const size_t _size;
+  JfrCheckpointBlobHandle _next;
+  mutable bool _written;
+
+  JfrCheckpointBlob(const u1* checkpoint, size_t size);
+  ~JfrCheckpointBlob();
+  const JfrCheckpointBlobHandle& next() const;
+  void write_this(JfrCheckpointWriter& writer) const;
+
+ public:
+  void write(JfrCheckpointWriter& writer) const;
+  void exclusive_write(JfrCheckpointWriter& writer) const;
+  void reset_write_state() const;
+  void set_next(const JfrCheckpointBlobHandle& ref);
+  static JfrCheckpointBlobHandle make(const u1* checkpoint, size_t size);
+};
+
+#endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP