1 /*
2 * Copyright (c) 1997, 2011, 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 #include "precompiled.hpp"
26 #include "interpreter/interpreter.hpp"
27 #include "oops/oop.inline.hpp"
28 #include "oops/symbol.hpp"
29 #include "runtime/frame.inline.hpp"
30 #include "runtime/rframe.hpp"
31 #include "runtime/vframe.hpp"
32 #include "runtime/vframe_hp.hpp"
33
34
35 static RFrame*const noCaller = (RFrame*) 0x1; // no caller (i.e., initial frame)
36 static RFrame*const noCallerYet = (RFrame*) 0x0; // caller not yet computed
37
38 RFrame::RFrame(frame fr, JavaThread* thread, RFrame*const callee) :
39 _fr(fr), _thread(thread), _callee(callee), _num(callee ? callee->num() + 1 : 0) {
40 _caller = (RFrame*)noCallerYet;
41 _invocations = 0;
42 _distance = 0;
43 }
44
45 void RFrame::set_distance(int d) {
46 assert(is_compiled() || d >= 0, "should be positive");
47 _distance = d;
48 }
49
50 InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
51 : RFrame(fr, thread, callee) {
52 RegisterMap map(thread, false);
53 _vf = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
54 _method = methodHandle(thread, _vf->method());
55 assert( _vf->is_interpreted_frame(), "must be interpreted");
56 init();
57 }
58
59 InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, methodHandle m)
60 : RFrame(fr, thread, NULL) {
61 RegisterMap map(thread, false);
62 _vf = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
63 _method = m;
64
65 assert( _vf->is_interpreted_frame(), "must be interpreted");
66 init();
67 }
68
69 CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread, RFrame*const callee)
70 : RFrame(fr, thread, callee) {
71 init();
72 }
73
74 CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread)
75 : RFrame(fr, thread, NULL) {
76 init();
77 }
78
79 DeoptimizedRFrame::DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
80 : InterpretedRFrame(fr, thread, callee) {}
81
82 RFrame* RFrame::new_RFrame(frame fr, JavaThread* thread, RFrame*const callee) {
83 RFrame* rf;
84 int dist = callee ? callee->distance() : -1;
85 if (fr.is_interpreted_frame()) {
86 rf = new InterpretedRFrame(fr, thread, callee);
87 dist++;
88 } else if (fr.is_compiled_frame()) {
89 // Even deopted frames look compiled because the deopt
90 // is invisible until it happens.
91 rf = new CompiledRFrame(fr, thread, callee);
92 } else {
93 assert(false, "Unhandled frame type");
94 }
95 rf->set_distance(dist);
96 rf->init();
97 return rf;
98 }
99
100 RFrame* RFrame::caller() {
101 if (_caller != noCallerYet) return (_caller == noCaller) ? NULL : _caller; // already computed caller
102
103 // caller not yet computed; do it now
104 if (_fr.is_first_java_frame()) {
105 _caller = (RFrame*)noCaller;
106 return NULL;
107 }
108
109 RegisterMap map(_thread, false);
110 frame sender = _fr.real_sender(&map);
111 if (sender.is_java_frame()) {
112 _caller = new_RFrame(sender, thread(), this);
113 return _caller;
114 }
115
116 // Real caller is not java related
117 _caller = (RFrame*)noCaller;
118 return NULL;
119 }
120
121 int InterpretedRFrame::cost() const {
122 return _method->code_size(); // fix this
123 //return _method->estimated_inline_cost(_receiverKlass);
124 }
125
126 int CompiledRFrame::cost() const {
127 nmethod* nm = top_method()->code();
128 if (nm != NULL) {
129 return nm->insts_size();
130 } else {
131 return top_method()->code_size();
132 }
133 }
134
135 void CompiledRFrame::init() {
136 RegisterMap map(thread(), false);
137 vframe* vf = vframe::new_vframe(&_fr, &map, thread());
138 assert(vf->is_compiled_frame(), "must be compiled");
139 _nm = compiledVFrame::cast(vf)->code();
140 vf = vf->top();
141 _vf = javaVFrame::cast(vf);
142 _method = methodHandle(thread(), CodeCache::find_nmethod(_fr.pc())->method());
143 assert(_method(), "should have found a method");
144 #ifndef PRODUCT
145 _invocations = _method->compiled_invocation_count();
146 #endif
147 }
148
149 void InterpretedRFrame::init() {
150 _invocations = _method->invocation_count() + _method->backedge_count();
151 }
152
153 void RFrame::print(const char* kind) {
154 #ifndef PRODUCT
155 #ifdef COMPILER2
156 int cnt = top_method()->interpreter_invocation_count();
157 #else
158 int cnt = top_method()->invocation_count();
159 #endif
160 tty->print("%3d %s ", _num, is_interpreted() ? "I" : "C");
161 top_method()->print_short_name(tty);
162 tty->print_cr(": inv=%5d(%d) cst=%4d", _invocations, cnt, cost());
163 #endif
164 }
165
166 void CompiledRFrame::print() {
167 RFrame::print("comp");
168 }
169
170 void InterpretedRFrame::print() {
171 RFrame::print("int.");
172 }
173
174 void DeoptimizedRFrame::print() {
175 RFrame::print("deopt.");
176 }