rframe.hpp revision 3602:da91efe96a93 
1/*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * published by the Free Software Foundation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
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24
25#ifndef SHARE_VM_RUNTIME_RFRAME_HPP
26#define SHARE_VM_RUNTIME_RFRAME_HPP
27
28#include "memory/allocation.hpp"
29#include "runtime/frame.inline.hpp"
30
31// rframes ("recompiler frames") decorate stack frames with some extra information
32// needed by the recompiler.  The recompiler views the stack (at the time of recompilation)
33// as a list of rframes.
34
35class RFrame : public ResourceObj {
36 protected:
37  const frame _fr;                  // my frame
38  JavaThread* const _thread;        // thread where frame resides.
39  RFrame* _caller;                  // caller / callee rframes (or NULL)
40  RFrame*const _callee;
41  const int _num;                   // stack frame number (0 = most recent)
42  int _invocations;                 // current invocation estimate (for this frame)
43                                    // (i.e., how often was this frame called)
44  int _distance;                    // recompilation search "distance" (measured in # of interpreted frames)
45
46  RFrame(frame fr, JavaThread* thread, RFrame*const callee);
47  virtual void init() = 0;          // compute invocations, loopDepth, etc.
48  void print(const char* name);
49
50 public:
51
52  static RFrame* new_RFrame(frame fr, JavaThread* thread, RFrame*const callee);
53
54  virtual bool is_interpreted() const     { return false; }
55  virtual bool is_compiled() const        { return false; }
56  int distance() const                    { return _distance; }
57  void set_distance(int d);
58  int invocations() const                 { return _invocations; }
59  int num() const                         { return _num; }
60  frame fr() const                        { return _fr; }
61  JavaThread* thread() const              { return _thread; }
62  virtual int cost() const = 0;           // estimated inlining cost (size)
63  virtual methodHandle top_method() const  = 0;
64  virtual javaVFrame* top_vframe() const = 0;
65  virtual nmethod* nm() const             { ShouldNotCallThis(); return NULL; }
66
67  RFrame* caller();
68  RFrame* callee() const                  { return _callee; }
69  RFrame* parent() const;                 // rframe containing lexical scope (if any)
70  virtual void print()                    = 0;
71
72  static int computeSends(Method* m);
73  static int computeSends(nmethod* nm);
74  static int computeCumulSends(Method* m);
75  static int computeCumulSends(nmethod* nm);
76};
77
78class CompiledRFrame : public RFrame {    // frame containing a compiled method
79 protected:
80  nmethod*    _nm;
81  javaVFrame* _vf;                        // top vframe; may be NULL (for most recent frame)
82  methodHandle _method;                   // top method
83
84  CompiledRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
85  void init();
86  friend class RFrame;
87
88 public:
89  CompiledRFrame(frame fr, JavaThread* thread); // for nmethod triggering its counter (callee == NULL)
90  bool is_compiled() const                 { return true; }
91  methodHandle top_method() const          { return _method; }
92  javaVFrame* top_vframe() const           { return _vf; }
93  nmethod* nm() const                      { return _nm; }
94  int cost() const;
95  void print();
96};
97
98class InterpretedRFrame : public RFrame {    // interpreter frame
99 protected:
100  javaVFrame* _vf;                           // may be NULL (for most recent frame)
101  methodHandle   _method;
102
103  InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
104  void init();
105  friend class RFrame;
106
107 public:
108  InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m); // constructor for method triggering its invocation counter
109  bool is_interpreted() const                { return true; }
110  methodHandle top_method() const            { return _method; }
111  javaVFrame* top_vframe() const             { return _vf; }
112  int cost() const;
113  void print();
114};
115
116// treat deoptimized frames as interpreted
117class DeoptimizedRFrame : public InterpretedRFrame {
118 protected:
119  DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const  callee);
120  friend class RFrame;
121 public:
122  void print();
123};
124
125#endif // SHARE_VM_RUNTIME_RFRAME_HPP
126