Mercurial > hg > truffle
annotate src/share/vm/code/scopeDesc.cpp @ 20417:d35872270666
8057658: Enable G1 FullGC extensions
Summary: Refactored the G1 FullGC code to enable it to be extended.
Reviewed-by: mgerdin, brutisso
author | sjohanss |
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date | Tue, 09 Sep 2014 00:05:25 +0200 |
parents | 78bbf4d43a14 |
children | 52b4284cb496 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/debugInfoRec.hpp" | |
27 #include "code/pcDesc.hpp" | |
28 #include "code/scopeDesc.hpp" | |
29 #include "memory/resourceArea.hpp" | |
30 #include "oops/oop.inline.hpp" | |
31 #include "runtime/handles.inline.hpp" | |
0 | 32 |
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33 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
0 | 34 |
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35 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop) { |
0 | 36 _code = code; |
37 _decode_offset = decode_offset; | |
38 _objects = decode_object_values(obj_decode_offset); | |
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39 _reexecute = reexecute; |
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40 _return_oop = return_oop; |
0 | 41 decode_body(); |
42 } | |
43 | |
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44 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop) { |
0 | 45 _code = code; |
46 _decode_offset = decode_offset; | |
47 _objects = decode_object_values(DebugInformationRecorder::serialized_null); | |
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48 _reexecute = reexecute; |
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49 _return_oop = return_oop; |
0 | 50 decode_body(); |
51 } | |
52 | |
53 | |
54 ScopeDesc::ScopeDesc(const ScopeDesc* parent) { | |
55 _code = parent->_code; | |
56 _decode_offset = parent->_sender_decode_offset; | |
57 _objects = parent->_objects; | |
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58 _reexecute = false; //reexecute only applies to the first scope |
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59 _return_oop = false; |
0 | 60 decode_body(); |
61 } | |
62 | |
63 | |
64 void ScopeDesc::decode_body() { | |
65 if (decode_offset() == DebugInformationRecorder::serialized_null) { | |
66 // This is a sentinel record, which is only relevant to | |
67 // approximate queries. Decode a reasonable frame. | |
68 _sender_decode_offset = DebugInformationRecorder::serialized_null; | |
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69 _method = _code->method(); |
0 | 70 _bci = InvocationEntryBci; |
71 _locals_decode_offset = DebugInformationRecorder::serialized_null; | |
72 _expressions_decode_offset = DebugInformationRecorder::serialized_null; | |
73 _monitors_decode_offset = DebugInformationRecorder::serialized_null; | |
74 } else { | |
75 // decode header | |
76 DebugInfoReadStream* stream = stream_at(decode_offset()); | |
77 | |
78 _sender_decode_offset = stream->read_int(); | |
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79 _method = stream->read_method(); |
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80 _bci = stream->read_bci(); |
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81 |
0 | 82 // decode offsets for body and sender |
83 _locals_decode_offset = stream->read_int(); | |
84 _expressions_decode_offset = stream->read_int(); | |
85 _monitors_decode_offset = stream->read_int(); | |
86 } | |
87 } | |
88 | |
89 | |
90 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { | |
91 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
92 DebugInfoReadStream* stream = stream_at(decode_offset); | |
93 int length = stream->read_int(); | |
94 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); | |
95 for (int index = 0; index < length; index++) { | |
96 result->push(ScopeValue::read_from(stream)); | |
97 } | |
98 return result; | |
99 } | |
100 | |
101 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { | |
102 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
103 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); | |
104 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); | |
105 int length = stream->read_int(); | |
106 for (int index = 0; index < length; index++) { | |
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107 // Objects values are pushed to 'result' array during read so that |
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108 // object's fields could reference it (OBJECT_ID_CODE). |
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109 (void)ScopeValue::read_from(stream); |
0 | 110 } |
111 assert(result->length() == length, "inconsistent debug information"); | |
112 return result; | |
113 } | |
114 | |
115 | |
116 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { | |
117 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
118 DebugInfoReadStream* stream = stream_at(decode_offset); | |
119 int length = stream->read_int(); | |
120 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); | |
121 for (int index = 0; index < length; index++) { | |
122 result->push(new MonitorValue(stream)); | |
123 } | |
124 return result; | |
125 } | |
126 | |
127 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { | |
128 return new DebugInfoReadStream(_code, decode_offset, _objects); | |
129 } | |
130 | |
131 GrowableArray<ScopeValue*>* ScopeDesc::locals() { | |
132 return decode_scope_values(_locals_decode_offset); | |
133 } | |
134 | |
135 GrowableArray<ScopeValue*>* ScopeDesc::expressions() { | |
136 return decode_scope_values(_expressions_decode_offset); | |
137 } | |
138 | |
139 GrowableArray<MonitorValue*>* ScopeDesc::monitors() { | |
140 return decode_monitor_values(_monitors_decode_offset); | |
141 } | |
142 | |
143 GrowableArray<ScopeValue*>* ScopeDesc::objects() { | |
144 return _objects; | |
145 } | |
146 | |
147 bool ScopeDesc::is_top() const { | |
148 return _sender_decode_offset == DebugInformationRecorder::serialized_null; | |
149 } | |
150 | |
151 ScopeDesc* ScopeDesc::sender() const { | |
152 if (is_top()) return NULL; | |
153 return new ScopeDesc(this); | |
154 } | |
155 | |
156 | |
157 #ifndef PRODUCT | |
158 | |
159 void ScopeDesc::print_value_on(outputStream* st) const { | |
160 tty->print(" "); | |
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161 method()->print_short_name(st); |
0 | 162 int lineno = method()->line_number_from_bci(bci()); |
163 if (lineno != -1) { | |
164 st->print_cr("@%d (line %d)", bci(), lineno); | |
165 } else { | |
166 st->print_cr("@%d", bci()); | |
167 } | |
168 } | |
169 | |
170 void ScopeDesc::print_on(outputStream* st) const { | |
171 print_on(st, NULL); | |
172 } | |
173 | |
174 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { | |
175 // header | |
176 if (pd != NULL) { | |
177 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset()); | |
178 } | |
179 | |
180 print_value_on(st); | |
181 // decode offsets | |
182 if (WizardMode) { | |
1748 | 183 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->content_begin()); |
0 | 184 st->print_cr(" offset: %d", _decode_offset); |
185 st->print_cr(" bci: %d", bci()); | |
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186 st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); |
0 | 187 st->print_cr(" locals: %d", _locals_decode_offset); |
188 st->print_cr(" stack: %d", _expressions_decode_offset); | |
189 st->print_cr(" monitor: %d", _monitors_decode_offset); | |
190 st->print_cr(" sender: %d", _sender_decode_offset); | |
191 } | |
192 // locals | |
193 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); | |
194 if (l != NULL) { | |
195 tty->print_cr(" Locals"); | |
196 for (int index = 0; index < l->length(); index++) { | |
197 st->print(" - l%d: ", index); | |
198 l->at(index)->print_on(st); | |
199 st->cr(); | |
200 } | |
201 } | |
202 } | |
203 // expressions | |
204 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); | |
205 if (l != NULL) { | |
206 st->print_cr(" Expression stack"); | |
207 for (int index = 0; index < l->length(); index++) { | |
208 st->print(" - @%d: ", index); | |
209 l->at(index)->print_on(st); | |
210 st->cr(); | |
211 } | |
212 } | |
213 } | |
214 // monitors | |
215 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); | |
216 if (l != NULL) { | |
217 st->print_cr(" Monitor stack"); | |
218 for (int index = 0; index < l->length(); index++) { | |
219 st->print(" - @%d: ", index); | |
220 l->at(index)->print_on(st); | |
221 st->cr(); | |
222 } | |
223 } | |
224 } | |
225 | |
226 #ifdef COMPILER2 | |
227 if (DoEscapeAnalysis && is_top() && _objects != NULL) { | |
228 tty->print_cr("Objects"); | |
229 for (int i = 0; i < _objects->length(); i++) { | |
230 ObjectValue* sv = (ObjectValue*) _objects->at(i); | |
231 tty->print(" - %d: ", sv->id()); | |
232 sv->print_fields_on(tty); | |
233 tty->cr(); | |
234 } | |
235 } | |
236 #endif // COMPILER2 | |
237 } | |
238 | |
239 #endif | |
240 | |
241 void ScopeDesc::verify() { | |
242 ResourceMark rm; | |
243 guarantee(method()->is_method(), "type check"); | |
244 | |
245 // check if we have any illegal elements on the expression stack | |
246 { GrowableArray<ScopeValue*>* l = expressions(); | |
247 if (l != NULL) { | |
248 for (int index = 0; index < l->length(); index++) { | |
249 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); | |
250 } | |
251 } | |
252 } | |
253 } |