--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/runtime/rframe.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 1997, 2012, 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_RUNTIME_RFRAME_HPP
+#define SHARE_VM_RUNTIME_RFRAME_HPP
+
+#include "memory/allocation.hpp"
+#include "runtime/frame.inline.hpp"
+
+// rframes ("recompiler frames") decorate stack frames with some extra information
+// needed by the recompiler.  The recompiler views the stack (at the time of recompilation)
+// as a list of rframes.
+
+class RFrame : public ResourceObj {
+ protected:
+  const frame _fr;                  // my frame
+  JavaThread* const _thread;        // thread where frame resides.
+  RFrame* _caller;                  // caller / callee rframes (or NULL)
+  RFrame*const _callee;
+  const int _num;                   // stack frame number (0 = most recent)
+  int _invocations;                 // current invocation estimate (for this frame)
+                                    // (i.e., how often was this frame called)
+  int _distance;                    // recompilation search "distance" (measured in # of interpreted frames)
+
+  RFrame(frame fr, JavaThread* thread, RFrame*const callee);
+  virtual void init() = 0;          // compute invocations, loopDepth, etc.
+  void print(const char* name);
+
+ public:
+
+  static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee);
+
+  virtual bool is_interpreted() const     { return false; }
+  virtual bool is_compiled() const        { return false; }
+  int distance() const                    { return _distance; }
+  void set_distance(int d);
+  int invocations() const                 { return _invocations; }
+  int num() const                         { return _num; }
+  frame fr() const                        { return _fr; }
+  JavaThread* thread() const              { return _thread; }
+  virtual int cost() const = 0;           // estimated inlining cost (size)
+  virtual Method* top_method() const  = 0;
+  virtual javaVFrame* top_vframe() const = 0;
+  virtual nmethod* nm() const             { ShouldNotCallThis(); return NULL; }
+
+  RFrame* caller();
+  RFrame* callee() const                  { return _callee; }
+  RFrame* parent() const;                 // rframe containing lexical scope (if any)
+  virtual void print()                    = 0;
+
+  static int computeSends(Method* m);
+  static int computeSends(nmethod* nm);
+  static int computeCumulSends(Method* m);
+  static int computeCumulSends(nmethod* nm);
+};
+
+class CompiledRFrame : public RFrame {    // frame containing a compiled method
+ protected:
+  nmethod*    _nm;
+  javaVFrame* _vf;                        // top vframe; may be NULL (for most recent frame)
+  Method* _method;                        // top method
+
+  CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
+  void init();
+  friend class RFrame;
+
+ public:
+  CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL)
+  bool is_compiled() const                 { return true; }
+  Method* top_method() const               { return _method; }
+  javaVFrame* top_vframe() const           { return _vf; }
+  nmethod* nm() const                      { return _nm; }
+  int cost() const;
+  void print();
+};
+
+class InterpretedRFrame : public RFrame {    // interpreter frame
+ protected:
+  javaVFrame* _vf;                           // may be NULL (for most recent frame)
+  Method* _method;
+
+  InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
+  void init();
+  friend class RFrame;
+
+ public:
+  InterpretedRFrame(frame fr, JavaThread* thread, Method* m); // constructor for method triggering its invocation counter
+  bool is_interpreted() const                { return true; }
+  Method* top_method() const                 { return _method; }
+  javaVFrame* top_vframe() const             { return _vf; }
+  int cost() const;
+  void print();
+};
+
+// treat deoptimized frames as interpreted
+class DeoptimizedRFrame : public InterpretedRFrame {
+ protected:
+  DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
+  friend class RFrame;
+ public:
+  void print();
+};
+
+#endif // SHARE_VM_RUNTIME_RFRAME_HPP