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 "code/codeCache.hpp"
27 #include "interpreter/interpreter.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "oops/symbol.hpp"
30 #include "runtime/frame.inline.hpp"
31 #include "runtime/rframe.hpp"
32 #include "runtime/vframe.hpp"
33 #include "runtime/vframe_hp.hpp"
34
35
36 static RFrame*const noCaller = (RFrame*) 0x1; // no caller (i.e., initial frame)
37 static RFrame*const noCallerYet = (RFrame*) 0x0; // caller not yet computed
38
39 RFrame::RFrame(frame fr, JavaThread* thread, RFrame*const callee) :
40 _fr(fr), _thread(thread), _callee(callee), _num(callee ? callee->num() + 1 : 0) {
41 _caller = (RFrame*)noCallerYet;
42 _invocations = 0;
43 _distance = 0;
44 }
45
46 void RFrame::set_distance(int d) {
47 assert(is_compiled() || d >= 0, "should be positive");
48 _distance = d;
49 }
50
51 InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
52 : RFrame(fr, thread, callee) {
53 RegisterMap map(thread, false);
54 _vf = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
55 _method = _vf->method();
56 assert( _vf->is_interpreted_frame(), "must be interpreted");
57 init();
58 }
59
60 InterpretedRFrame::InterpretedRFrame(frame fr, JavaThread* thread, Method* m)
61 : RFrame(fr, thread, NULL) {
62 RegisterMap map(thread, false);
63 _vf = javaVFrame::cast(vframe::new_vframe(&_fr, &map, thread));
64 _method = m;
65
66 assert( _vf->is_interpreted_frame(), "must be interpreted");
67 init();
68 }
69
70 CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread, RFrame*const callee)
71 : RFrame(fr, thread, callee) {
72 init();
73 }
74
75 CompiledRFrame::CompiledRFrame(frame fr, JavaThread* thread)
76 : RFrame(fr, thread, NULL) {
77 init();
78 }
79
80 DeoptimizedRFrame::DeoptimizedRFrame(frame fr, JavaThread* thread, RFrame*const callee)
81 : InterpretedRFrame(fr, thread, callee) {}
82
83 RFrame* RFrame::new_RFrame(frame fr, JavaThread* thread, RFrame*const callee) {
84 RFrame* rf;
85 int dist = callee ? callee->distance() : -1;
86 if (fr.is_interpreted_frame()) {
87 rf = new InterpretedRFrame(fr, thread, callee);
88 dist++;
89 } else if (fr.is_compiled_frame()) {
90 // Even deopted frames look compiled because the deopt
91 // is invisible until it happens.
92 rf = new CompiledRFrame(fr, thread, callee);
93 } else {
94 assert(false, "Unhandled frame type");
95 }
96 rf->set_distance(dist);
97 rf->init();
98 return rf;
99 }
100
101 RFrame* RFrame::caller() {
102 if (_caller != noCallerYet) return (_caller == noCaller) ? NULL : _caller; // already computed caller
103
104 // caller not yet computed; do it now
105 if (_fr.is_first_java_frame()) {
106 _caller = (RFrame*)noCaller;
107 return NULL;
108 }
109
110 RegisterMap map(_thread, false);
111 frame sender = _fr.real_sender(&map);
112 if (sender.is_java_frame()) {
113 _caller = new_RFrame(sender, thread(), this);
114 return _caller;
115 }
116
117 // Real caller is not java related
118 _caller = (RFrame*)noCaller;
119 return NULL;
120 }
121
122 int InterpretedRFrame::cost() const {
123 return _method->code_size(); // fix this
124 //return _method->estimated_inline_cost(_receiverKlass);
125 }
126
127 int CompiledRFrame::cost() const {
128 nmethod* nm = top_method()->code();
129 if (nm != NULL) {
130 return nm->insts_size();
131 } else {
132 return top_method()->code_size();
133 }
134 }
135
136 void CompiledRFrame::init() {
137 RegisterMap map(thread(), false);
138 vframe* vf = vframe::new_vframe(&_fr, &map, thread());
139 assert(vf->is_compiled_frame(), "must be compiled");
140 _nm = compiledVFrame::cast(vf)->code();
141 vf = vf->top();
142 _vf = javaVFrame::cast(vf);
143 _method = CodeCache::find_nmethod(_fr.pc())->method();
144 assert(_method, "should have found a method");
145 #ifndef PRODUCT
146 _invocations = _method->compiled_invocation_count();
147 #endif
148 }
149
150 void InterpretedRFrame::init() {
151 _invocations = _method->invocation_count() + _method->backedge_count();
152 }
153
154 void RFrame::print(const char* kind) {
155 #ifndef PRODUCT
156 #ifdef COMPILER2
157 int cnt = top_method()->interpreter_invocation_count();
158 #else
159 int cnt = top_method()->invocation_count();
160 #endif
161 tty->print("%3d %s ", _num, is_interpreted() ? "I" : "C");
162 top_method()->print_short_name(tty);
163 tty->print_cr(": inv=%5d(%d) cst=%4d", _invocations, cnt, cost());
164 #endif
165 }
166
167 void CompiledRFrame::print() {
168 RFrame::print("comp");
169 }
170
171 void InterpretedRFrame::print() {
172 RFrame::print("int.");
173 }
174
175 void DeoptimizedRFrame::print() {
176 RFrame::print("deopt.");
177 }