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comparison src/share/vm/code/scopeDesc.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 52fed2ec0afb
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 # include "incls/_precompiled.incl"
26 # include "incls/_scopeDesc.cpp.incl"
27
28
29 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset) {
30 _code = code;
31 _decode_offset = decode_offset;
32 _objects = decode_object_values(obj_decode_offset);
33 decode_body();
34 }
35
36 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset) {
37 _code = code;
38 _decode_offset = decode_offset;
39 _objects = decode_object_values(DebugInformationRecorder::serialized_null);
40 decode_body();
41 }
42
43
44 ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
45 _code = parent->_code;
46 _decode_offset = parent->_sender_decode_offset;
47 _objects = parent->_objects;
48 decode_body();
49 }
50
51
52 void ScopeDesc::decode_body() {
53 if (decode_offset() == DebugInformationRecorder::serialized_null) {
54 // This is a sentinel record, which is only relevant to
55 // approximate queries. Decode a reasonable frame.
56 _sender_decode_offset = DebugInformationRecorder::serialized_null;
57 _method = methodHandle(_code->method());
58 _bci = InvocationEntryBci;
59 _locals_decode_offset = DebugInformationRecorder::serialized_null;
60 _expressions_decode_offset = DebugInformationRecorder::serialized_null;
61 _monitors_decode_offset = DebugInformationRecorder::serialized_null;
62 } else {
63 // decode header
64 DebugInfoReadStream* stream = stream_at(decode_offset());
65
66 _sender_decode_offset = stream->read_int();
67 _method = methodHandle((methodOop) stream->read_oop());
68 _bci = stream->read_bci();
69 // decode offsets for body and sender
70 _locals_decode_offset = stream->read_int();
71 _expressions_decode_offset = stream->read_int();
72 _monitors_decode_offset = stream->read_int();
73 }
74 }
75
76
77 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
78 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
79 DebugInfoReadStream* stream = stream_at(decode_offset);
80 int length = stream->read_int();
81 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
82 for (int index = 0; index < length; index++) {
83 result->push(ScopeValue::read_from(stream));
84 }
85 return result;
86 }
87
88 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
89 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
90 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
91 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
92 int length = stream->read_int();
93 for (int index = 0; index < length; index++) {
94 result->push(ScopeValue::read_from(stream));
95 }
96 assert(result->length() == length, "inconsistent debug information");
97 return result;
98 }
99
100
101 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
102 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
103 DebugInfoReadStream* stream = stream_at(decode_offset);
104 int length = stream->read_int();
105 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
106 for (int index = 0; index < length; index++) {
107 result->push(new MonitorValue(stream));
108 }
109 return result;
110 }
111
112 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
113 return new DebugInfoReadStream(_code, decode_offset, _objects);
114 }
115
116 GrowableArray<ScopeValue*>* ScopeDesc::locals() {
117 return decode_scope_values(_locals_decode_offset);
118 }
119
120 GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
121 return decode_scope_values(_expressions_decode_offset);
122 }
123
124 GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
125 return decode_monitor_values(_monitors_decode_offset);
126 }
127
128 GrowableArray<ScopeValue*>* ScopeDesc::objects() {
129 return _objects;
130 }
131
132 bool ScopeDesc::is_top() const {
133 return _sender_decode_offset == DebugInformationRecorder::serialized_null;
134 }
135
136 ScopeDesc* ScopeDesc::sender() const {
137 if (is_top()) return NULL;
138 return new ScopeDesc(this);
139 }
140
141
142 #ifndef PRODUCT
143
144 void ScopeDesc::print_value_on(outputStream* st) const {
145 tty->print(" ");
146 method()()->print_short_name(st);
147 int lineno = method()->line_number_from_bci(bci());
148 if (lineno != -1) {
149 st->print_cr("@%d (line %d)", bci(), lineno);
150 } else {
151 st->print_cr("@%d", bci());
152 }
153 }
154
155 void ScopeDesc::print_on(outputStream* st) const {
156 print_on(st, NULL);
157 }
158
159 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
160 // header
161 if (pd != NULL) {
162 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
163 }
164
165 print_value_on(st);
166 // decode offsets
167 if (WizardMode) {
168 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
169 st->print_cr(" offset: %d", _decode_offset);
170 st->print_cr(" bci: %d", bci());
171 st->print_cr(" locals: %d", _locals_decode_offset);
172 st->print_cr(" stack: %d", _expressions_decode_offset);
173 st->print_cr(" monitor: %d", _monitors_decode_offset);
174 st->print_cr(" sender: %d", _sender_decode_offset);
175 }
176 // locals
177 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
178 if (l != NULL) {
179 tty->print_cr(" Locals");
180 for (int index = 0; index < l->length(); index++) {
181 st->print(" - l%d: ", index);
182 l->at(index)->print_on(st);
183 st->cr();
184 }
185 }
186 }
187 // expressions
188 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
189 if (l != NULL) {
190 st->print_cr(" Expression stack");
191 for (int index = 0; index < l->length(); index++) {
192 st->print(" - @%d: ", index);
193 l->at(index)->print_on(st);
194 st->cr();
195 }
196 }
197 }
198 // monitors
199 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
200 if (l != NULL) {
201 st->print_cr(" Monitor stack");
202 for (int index = 0; index < l->length(); index++) {
203 st->print(" - @%d: ", index);
204 l->at(index)->print_on(st);
205 st->cr();
206 }
207 }
208 }
209
210 #ifdef COMPILER2
211 if (DoEscapeAnalysis && is_top() && _objects != NULL) {
212 tty->print_cr("Objects");
213 for (int i = 0; i < _objects->length(); i++) {
214 ObjectValue* sv = (ObjectValue*) _objects->at(i);
215 tty->print(" - %d: ", sv->id());
216 sv->print_fields_on(tty);
217 tty->cr();
218 }
219 }
220 #endif // COMPILER2
221 }
222
223 #endif
224
225 void ScopeDesc::verify() {
226 ResourceMark rm;
227 guarantee(method()->is_method(), "type check");
228
229 // check if we have any illegal elements on the expression stack
230 { GrowableArray<ScopeValue*>* l = expressions();
231 if (l != NULL) {
232 for (int index = 0; index < l->length(); index++) {
233 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
234 }
235 }
236 }
237 }