Mercurial > hg > truffle
annotate src/share/vm/code/scopeDesc.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | f95d63e2154a |
| children | e522a00b91aa 78bbf4d43a14 |
| 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 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; |
| 0 | 40 decode_body(); |
| 41 } | |
| 42 | |
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43 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop) { |
| 0 | 44 _code = code; |
| 45 _decode_offset = decode_offset; | |
| 46 _objects = decode_object_values(DebugInformationRecorder::serialized_null); | |
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47 _reexecute = reexecute; |
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48 _return_oop = return_oop; |
| 0 | 49 decode_body(); |
| 50 } | |
| 51 | |
| 52 | |
| 53 ScopeDesc::ScopeDesc(const ScopeDesc* parent) { | |
| 54 _code = parent->_code; | |
| 55 _decode_offset = parent->_sender_decode_offset; | |
| 56 _objects = parent->_objects; | |
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57 _reexecute = false; //reexecute only applies to the first scope |
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58 _return_oop = false; |
| 0 | 59 decode_body(); |
| 60 } | |
| 61 | |
| 62 | |
| 63 void ScopeDesc::decode_body() { | |
| 64 if (decode_offset() == DebugInformationRecorder::serialized_null) { | |
| 65 // This is a sentinel record, which is only relevant to | |
| 66 // approximate queries. Decode a reasonable frame. | |
| 67 _sender_decode_offset = DebugInformationRecorder::serialized_null; | |
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68 _method = _code->method(); |
| 0 | 69 _bci = InvocationEntryBci; |
| 70 _locals_decode_offset = DebugInformationRecorder::serialized_null; | |
| 71 _expressions_decode_offset = DebugInformationRecorder::serialized_null; | |
| 72 _monitors_decode_offset = DebugInformationRecorder::serialized_null; | |
| 73 } else { | |
| 74 // decode header | |
| 75 DebugInfoReadStream* stream = stream_at(decode_offset()); | |
| 76 | |
| 77 _sender_decode_offset = stream->read_int(); | |
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78 _method = stream->read_method(); |
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79 _bci = stream->read_bci(); |
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80 |
| 0 | 81 // decode offsets for body and sender |
| 82 _locals_decode_offset = stream->read_int(); | |
| 83 _expressions_decode_offset = stream->read_int(); | |
| 84 _monitors_decode_offset = stream->read_int(); | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 | |
| 89 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { | |
| 90 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 91 DebugInfoReadStream* stream = stream_at(decode_offset); | |
| 92 int length = stream->read_int(); | |
| 93 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); | |
| 94 for (int index = 0; index < length; index++) { | |
| 95 result->push(ScopeValue::read_from(stream)); | |
| 96 } | |
| 97 return result; | |
| 98 } | |
| 99 | |
| 100 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { | |
| 101 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 102 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); | |
| 103 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); | |
| 104 int length = stream->read_int(); | |
| 105 for (int index = 0; index < length; index++) { | |
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106 // Objects values are pushed to 'result' array during read so that |
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107 // object's fields could reference it (OBJECT_ID_CODE). |
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108 (void)ScopeValue::read_from(stream); |
| 0 | 109 } |
| 110 assert(result->length() == length, "inconsistent debug information"); | |
| 111 return result; | |
| 112 } | |
| 113 | |
| 114 | |
| 115 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { | |
| 116 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; | |
| 117 DebugInfoReadStream* stream = stream_at(decode_offset); | |
| 118 int length = stream->read_int(); | |
| 119 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); | |
| 120 for (int index = 0; index < length; index++) { | |
| 121 result->push(new MonitorValue(stream)); | |
| 122 } | |
| 123 return result; | |
| 124 } | |
| 125 | |
| 126 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { | |
| 127 return new DebugInfoReadStream(_code, decode_offset, _objects); | |
| 128 } | |
| 129 | |
| 130 GrowableArray<ScopeValue*>* ScopeDesc::locals() { | |
| 131 return decode_scope_values(_locals_decode_offset); | |
| 132 } | |
| 133 | |
| 134 GrowableArray<ScopeValue*>* ScopeDesc::expressions() { | |
| 135 return decode_scope_values(_expressions_decode_offset); | |
| 136 } | |
| 137 | |
| 138 GrowableArray<MonitorValue*>* ScopeDesc::monitors() { | |
| 139 return decode_monitor_values(_monitors_decode_offset); | |
| 140 } | |
| 141 | |
| 142 GrowableArray<ScopeValue*>* ScopeDesc::objects() { | |
| 143 return _objects; | |
| 144 } | |
| 145 | |
| 146 bool ScopeDesc::is_top() const { | |
| 147 return _sender_decode_offset == DebugInformationRecorder::serialized_null; | |
| 148 } | |
| 149 | |
| 150 ScopeDesc* ScopeDesc::sender() const { | |
| 151 if (is_top()) return NULL; | |
| 152 return new ScopeDesc(this); | |
| 153 } | |
| 154 | |
| 155 | |
| 156 #ifndef PRODUCT | |
| 157 | |
| 158 void ScopeDesc::print_value_on(outputStream* st) const { | |
| 159 tty->print(" "); | |
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160 method()->print_short_name(st); |
| 0 | 161 int lineno = method()->line_number_from_bci(bci()); |
| 162 if (lineno != -1) { | |
| 163 st->print_cr("@%d (line %d)", bci(), lineno); | |
| 164 } else { | |
| 165 st->print_cr("@%d", bci()); | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 void ScopeDesc::print_on(outputStream* st) const { | |
| 170 print_on(st, NULL); | |
| 171 } | |
| 172 | |
| 173 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { | |
| 174 // header | |
| 175 if (pd != NULL) { | |
| 176 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset()); | |
| 177 } | |
| 178 | |
| 179 print_value_on(st); | |
| 180 // decode offsets | |
| 181 if (WizardMode) { | |
| 1748 | 182 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->content_begin()); |
| 0 | 183 st->print_cr(" offset: %d", _decode_offset); |
| 184 st->print_cr(" bci: %d", bci()); | |
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185 st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); |
| 0 | 186 st->print_cr(" locals: %d", _locals_decode_offset); |
| 187 st->print_cr(" stack: %d", _expressions_decode_offset); | |
| 188 st->print_cr(" monitor: %d", _monitors_decode_offset); | |
| 189 st->print_cr(" sender: %d", _sender_decode_offset); | |
| 190 } | |
| 191 // locals | |
| 192 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); | |
| 193 if (l != NULL) { | |
| 194 tty->print_cr(" Locals"); | |
| 195 for (int index = 0; index < l->length(); index++) { | |
| 196 st->print(" - l%d: ", index); | |
| 197 l->at(index)->print_on(st); | |
| 198 st->cr(); | |
| 199 } | |
| 200 } | |
| 201 } | |
| 202 // expressions | |
| 203 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); | |
| 204 if (l != NULL) { | |
| 205 st->print_cr(" Expression stack"); | |
| 206 for (int index = 0; index < l->length(); index++) { | |
| 207 st->print(" - @%d: ", index); | |
| 208 l->at(index)->print_on(st); | |
| 209 st->cr(); | |
| 210 } | |
| 211 } | |
| 212 } | |
| 213 // monitors | |
| 214 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); | |
| 215 if (l != NULL) { | |
| 216 st->print_cr(" Monitor stack"); | |
| 217 for (int index = 0; index < l->length(); index++) { | |
| 218 st->print(" - @%d: ", index); | |
| 219 l->at(index)->print_on(st); | |
| 220 st->cr(); | |
| 221 } | |
| 222 } | |
| 223 } | |
| 224 | |
| 225 #ifdef COMPILER2 | |
| 226 if (DoEscapeAnalysis && is_top() && _objects != NULL) { | |
| 227 tty->print_cr("Objects"); | |
| 228 for (int i = 0; i < _objects->length(); i++) { | |
| 229 ObjectValue* sv = (ObjectValue*) _objects->at(i); | |
| 230 tty->print(" - %d: ", sv->id()); | |
| 231 sv->print_fields_on(tty); | |
| 232 tty->cr(); | |
| 233 } | |
| 234 } | |
| 235 #endif // COMPILER2 | |
| 236 } | |
| 237 | |
| 238 #endif | |
| 239 | |
| 240 void ScopeDesc::verify() { | |
| 241 ResourceMark rm; | |
| 242 guarantee(method()->is_method(), "type check"); | |
| 243 | |
| 244 // check if we have any illegal elements on the expression stack | |
| 245 { GrowableArray<ScopeValue*>* l = expressions(); | |
| 246 if (l != NULL) { | |
| 247 for (int index = 0; index < l->length(); index++) { | |
| 248 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); | |
| 249 } | |
| 250 } | |
| 251 } | |
| 252 } |