1 /*
2 * Copyright 1997-2008 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 // Objects values are pushed to 'result' array during read so that
95 // object's fields could reference it (OBJECT_ID_CODE).
96 (void)ScopeValue::read_from(stream);
97 }
98 assert(result->length() == length, "inconsistent debug information");
99 return result;
100 }
101
102
103 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
104 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
105 DebugInfoReadStream* stream = stream_at(decode_offset);
106 int length = stream->read_int();
107 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
108 for (int index = 0; index < length; index++) {
109 result->push(new MonitorValue(stream));
110 }
111 return result;
112 }
113
114 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
115 return new DebugInfoReadStream(_code, decode_offset, _objects);
116 }
117
118 GrowableArray<ScopeValue*>* ScopeDesc::locals() {
119 return decode_scope_values(_locals_decode_offset);
120 }
121
122 GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
123 return decode_scope_values(_expressions_decode_offset);
124 }
125
126 GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
127 return decode_monitor_values(_monitors_decode_offset);
128 }
129
130 GrowableArray<ScopeValue*>* ScopeDesc::objects() {
131 return _objects;
132 }
133
134 bool ScopeDesc::is_top() const {
135 return _sender_decode_offset == DebugInformationRecorder::serialized_null;
136 }
137
138 ScopeDesc* ScopeDesc::sender() const {
139 if (is_top()) return NULL;
140 return new ScopeDesc(this);
141 }
142
143
144 #ifndef PRODUCT
145
146 void ScopeDesc::print_value_on(outputStream* st) const {
147 tty->print(" ");
148 method()()->print_short_name(st);
149 int lineno = method()->line_number_from_bci(bci());
150 if (lineno != -1) {
151 st->print_cr("@%d (line %d)", bci(), lineno);
152 } else {
153 st->print_cr("@%d", bci());
154 }
155 }
156
157 void ScopeDesc::print_on(outputStream* st) const {
158 print_on(st, NULL);
159 }
160
161 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
162 // header
163 if (pd != NULL) {
164 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
165 }
166
167 print_value_on(st);
168 // decode offsets
169 if (WizardMode) {
170 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
171 st->print_cr(" offset: %d", _decode_offset);
172 st->print_cr(" bci: %d", bci());
173 st->print_cr(" locals: %d", _locals_decode_offset);
174 st->print_cr(" stack: %d", _expressions_decode_offset);
175 st->print_cr(" monitor: %d", _monitors_decode_offset);
176 st->print_cr(" sender: %d", _sender_decode_offset);
177 }
178 // locals
179 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
180 if (l != NULL) {
181 tty->print_cr(" Locals");
182 for (int index = 0; index < l->length(); index++) {
183 st->print(" - l%d: ", index);
184 l->at(index)->print_on(st);
185 st->cr();
186 }
187 }
188 }
189 // expressions
190 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
191 if (l != NULL) {
192 st->print_cr(" Expression stack");
193 for (int index = 0; index < l->length(); index++) {
194 st->print(" - @%d: ", index);
195 l->at(index)->print_on(st);
196 st->cr();
197 }
198 }
199 }
200 // monitors
201 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
202 if (l != NULL) {
203 st->print_cr(" Monitor stack");
204 for (int index = 0; index < l->length(); index++) {
205 st->print(" - @%d: ", index);
206 l->at(index)->print_on(st);
207 st->cr();
208 }
209 }
210 }
211
212 #ifdef COMPILER2
213 if (DoEscapeAnalysis && is_top() && _objects != NULL) {
214 tty->print_cr("Objects");
215 for (int i = 0; i < _objects->length(); i++) {
216 ObjectValue* sv = (ObjectValue*) _objects->at(i);
217 tty->print(" - %d: ", sv->id());
218 sv->print_fields_on(tty);
219 tty->cr();
220 }
221 }
222 #endif // COMPILER2
223 }
224
225 #endif
226
227 void ScopeDesc::verify() {
228 ResourceMark rm;
229 guarantee(method()->is_method(), "type check");
230
231 // check if we have any illegal elements on the expression stack
232 { GrowableArray<ScopeValue*>* l = expressions();
233 if (l != NULL) {
234 for (int index = 0; index < l->length(); index++) {
235 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
236 }
237 }
238 }
239 }