Mercurial > hg > truffle
annotate src/share/vm/code/scopeDesc.cpp @ 7046:b6a8f2d23057
VM support for deferred reads and writes: ScopeDesc, DebugInfo, DebugInfoRecorder
| author | Lukas Stadler <lukas.stadler@jku.at> |
|---|---|
| date | Tue, 27 Nov 2012 13:43:04 +0100 |
| parents | e522a00b91aa |
| children | d4e6c82cd6a1 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 |
| 33 | |
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34 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool rethrow_exception, bool return_oop) { |
| 0 | 35 _code = code; |
| 36 _decode_offset = decode_offset; | |
| 37 _objects = decode_object_values(obj_decode_offset); | |
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38 _reexecute = reexecute; |
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39 _return_oop = return_oop; |
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40 _rethrow_exception = rethrow_exception; |
| 0 | 41 decode_body(); |
| 42 } | |
| 43 | |
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44 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool rethrow_exception, 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; |
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50 _rethrow_exception = rethrow_exception; |
| 0 | 51 decode_body(); |
| 52 } | |
| 53 | |
| 54 | |
| 55 ScopeDesc::ScopeDesc(const ScopeDesc* parent) { | |
| 56 _code = parent->_code; | |
| 57 _decode_offset = parent->_sender_decode_offset; | |
| 58 _objects = parent->_objects; | |
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59 _reexecute = false; //reexecute only applies to the first scope |
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60 _rethrow_exception = false; |
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61 _return_oop = false; |
| 0 | 62 decode_body(); |
| 63 } | |
| 64 | |
| 65 | |
| 66 void ScopeDesc::decode_body() { | |
| 67 if (decode_offset() == DebugInformationRecorder::serialized_null) { | |
| 68 // This is a sentinel record, which is only relevant to | |
| 69 // approximate queries. Decode a reasonable frame. | |
| 70 _sender_decode_offset = DebugInformationRecorder::serialized_null; | |
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71 _method = _code->method(); |
| 0 | 72 _bci = InvocationEntryBci; |
| 73 _locals_decode_offset = DebugInformationRecorder::serialized_null; | |
| 74 _expressions_decode_offset = DebugInformationRecorder::serialized_null; | |
| 75 _monitors_decode_offset = DebugInformationRecorder::serialized_null; | |
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76 #ifdef GRAAL |
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77 _deferred_writes_decode_offset = DebugInformationRecorder::serialized_null; |
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78 #endif // GRAAL |
| 0 | 79 } else { |
| 80 // decode header | |
| 81 DebugInfoReadStream* stream = stream_at(decode_offset()); | |
| 82 | |
| 83 _sender_decode_offset = stream->read_int(); | |
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84 _method = stream->read_method(); |
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85 _bci = stream->read_bci(); |
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86 |
| 0 | 87 // decode offsets for body and sender |
| 88 _locals_decode_offset = stream->read_int(); | |
| 89 _expressions_decode_offset = stream->read_int(); | |
| 90 _monitors_decode_offset = stream->read_int(); | |
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91 #ifdef GRAAL |
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92 _deferred_writes_decode_offset = stream->read_int(); |
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93 #endif // GRAAL |
| 0 | 94 } |
| 95 } | |
| 96 | |
| 97 | |
| 98 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { | |
| 99 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 100 DebugInfoReadStream* stream = stream_at(decode_offset); | |
| 101 int length = stream->read_int(); | |
| 102 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); | |
| 103 for (int index = 0; index < length; index++) { | |
| 104 result->push(ScopeValue::read_from(stream)); | |
| 105 } | |
| 106 return result; | |
| 107 } | |
| 108 | |
| 109 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { | |
| 110 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 111 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); | |
| 112 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); | |
| 113 int length = stream->read_int(); | |
| 114 for (int index = 0; index < length; index++) { | |
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115 // Objects values are pushed to 'result' array during read so that |
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116 // object's fields could reference it (OBJECT_ID_CODE). |
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117 (void)ScopeValue::read_from(stream); |
| 0 | 118 } |
| 119 assert(result->length() == length, "inconsistent debug information"); | |
| 120 return result; | |
| 121 } | |
| 122 | |
| 123 | |
| 124 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { | |
| 125 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 126 DebugInfoReadStream* stream = stream_at(decode_offset); | |
| 127 int length = stream->read_int(); | |
| 128 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); | |
| 129 for (int index = 0; index < length; index++) { | |
| 130 result->push(new MonitorValue(stream)); | |
| 131 } | |
| 132 return result; | |
| 133 } | |
| 134 | |
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135 #ifdef GRAAL |
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136 |
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137 GrowableArray<DeferredWriteValue*>* ScopeDesc::decode_deferred_writes(int decode_offset) { |
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138 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
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139 DebugInfoReadStream* stream = stream_at(decode_offset); |
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140 int length = stream->read_int(); |
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141 GrowableArray<DeferredWriteValue*>* result = new GrowableArray<DeferredWriteValue*> (length); |
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142 for (int index = 0; index < length; index++) { |
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143 result->push(new DeferredWriteValue(stream)); |
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144 } |
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145 return result; |
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146 } |
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147 |
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148 GrowableArray<DeferredWriteValue*>* ScopeDesc::deferred_writes() { |
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149 return decode_deferred_writes(_deferred_writes_decode_offset); |
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150 } |
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151 |
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152 #endif // GRAAL |
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153 |
| 0 | 154 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { |
| 155 return new DebugInfoReadStream(_code, decode_offset, _objects); | |
| 156 } | |
| 157 | |
| 158 GrowableArray<ScopeValue*>* ScopeDesc::locals() { | |
| 159 return decode_scope_values(_locals_decode_offset); | |
| 160 } | |
| 161 | |
| 162 GrowableArray<ScopeValue*>* ScopeDesc::expressions() { | |
| 163 return decode_scope_values(_expressions_decode_offset); | |
| 164 } | |
| 165 | |
| 166 GrowableArray<MonitorValue*>* ScopeDesc::monitors() { | |
| 167 return decode_monitor_values(_monitors_decode_offset); | |
| 168 } | |
| 169 | |
| 170 GrowableArray<ScopeValue*>* ScopeDesc::objects() { | |
| 171 return _objects; | |
| 172 } | |
| 173 | |
| 174 bool ScopeDesc::is_top() const { | |
| 175 return _sender_decode_offset == DebugInformationRecorder::serialized_null; | |
| 176 } | |
| 177 | |
| 178 ScopeDesc* ScopeDesc::sender() const { | |
| 179 if (is_top()) return NULL; | |
| 180 return new ScopeDesc(this); | |
| 181 } | |
| 182 | |
| 183 | |
| 184 #ifndef PRODUCT | |
| 185 | |
| 186 void ScopeDesc::print_value_on(outputStream* st) const { | |
| 187 tty->print(" "); | |
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188 method()->print_short_name(st); |
| 0 | 189 int lineno = method()->line_number_from_bci(bci()); |
| 190 if (lineno != -1) { | |
| 191 st->print_cr("@%d (line %d)", bci(), lineno); | |
| 192 } else { | |
| 193 st->print_cr("@%d", bci()); | |
| 194 } | |
| 195 } | |
| 196 | |
| 197 void ScopeDesc::print_on(outputStream* st) const { | |
| 198 print_on(st, NULL); | |
| 199 } | |
| 200 | |
| 201 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { | |
| 202 // header | |
| 203 if (pd != NULL) { | |
| 204 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset()); | |
| 205 } | |
| 206 | |
| 207 print_value_on(st); | |
| 208 // decode offsets | |
| 209 if (WizardMode) { | |
| 1748 | 210 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->content_begin()); |
| 0 | 211 st->print_cr(" offset: %d", _decode_offset); |
| 212 st->print_cr(" bci: %d", bci()); | |
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213 st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); |
| 0 | 214 st->print_cr(" locals: %d", _locals_decode_offset); |
| 215 st->print_cr(" stack: %d", _expressions_decode_offset); | |
| 216 st->print_cr(" monitor: %d", _monitors_decode_offset); | |
| 217 st->print_cr(" sender: %d", _sender_decode_offset); | |
| 218 } | |
| 219 // locals | |
| 220 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); | |
| 221 if (l != NULL) { | |
| 222 tty->print_cr(" Locals"); | |
| 223 for (int index = 0; index < l->length(); index++) { | |
| 224 st->print(" - l%d: ", index); | |
| 225 l->at(index)->print_on(st); | |
| 226 st->cr(); | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 // expressions | |
| 231 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); | |
| 232 if (l != NULL) { | |
| 233 st->print_cr(" Expression stack"); | |
| 234 for (int index = 0; index < l->length(); index++) { | |
| 235 st->print(" - @%d: ", index); | |
| 236 l->at(index)->print_on(st); | |
| 237 st->cr(); | |
| 238 } | |
| 239 } | |
| 240 } | |
| 241 // monitors | |
| 242 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); | |
| 243 if (l != NULL) { | |
| 244 st->print_cr(" Monitor stack"); | |
| 245 for (int index = 0; index < l->length(); index++) { | |
| 246 st->print(" - @%d: ", index); | |
| 247 l->at(index)->print_on(st); | |
| 248 st->cr(); | |
| 249 } | |
| 250 } | |
| 251 } | |
| 252 | |
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253 #if defined(COMPILER2) || defined(GRAAL) |
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254 if (NOT_GRAAL(DoEscapeAnalysis &&) is_top() && _objects != NULL) { |
| 0 | 255 tty->print_cr("Objects"); |
| 256 for (int i = 0; i < _objects->length(); i++) { | |
| 257 ObjectValue* sv = (ObjectValue*) _objects->at(i); | |
| 258 tty->print(" - %d: ", sv->id()); | |
| 259 sv->print_fields_on(tty); | |
| 260 tty->cr(); | |
| 261 } | |
| 262 } | |
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263 #endif // COMPILER2 || GRAAL |
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264 #ifdef GRAAL |
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265 // deferred writes |
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266 { GrowableArray<DeferredWriteValue*>* l = ((ScopeDesc*) this)->deferred_writes(); |
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267 if (l != NULL) { |
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268 st->print_cr(" Deferred writes"); |
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269 for (int index = 0; index < l->length(); index++) { |
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270 st->print(" - @%d: ", index); |
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271 l->at(index)->print_on(st); |
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272 st->cr(); |
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273 } |
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274 } |
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275 } |
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276 #endif |
| 0 | 277 } |
| 278 | |
| 279 #endif | |
| 280 | |
| 281 void ScopeDesc::verify() { | |
| 282 ResourceMark rm; | |
| 283 guarantee(method()->is_method(), "type check"); | |
| 284 | |
| 285 // check if we have any illegal elements on the expression stack | |
| 286 { GrowableArray<ScopeValue*>* l = expressions(); | |
| 287 if (l != NULL) { | |
| 288 for (int index = 0; index < l->length(); index++) { | |
| 289 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 } |