1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
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
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
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
35 class 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 Method* 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
78 class 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 Method* _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 Method* 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
98 class InterpretedRFrame : public RFrame { // interpreter frame
99 protected:
100 javaVFrame* _vf; // may be NULL (for most recent frame)
101 Method* _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, Method* m); // constructor for method triggering its invocation counter
109 bool is_interpreted() const { return true; }
110 Method* 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
117 class 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