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 assert(_reexecute == false, "reexecute not allowed"); 50 } 51 52 53 void ScopeDesc::decode_body() { 54 if (decode_offset() == DebugInformationRecorder::serialized_null) { 55 // This is a sentinel record, which is only relevant to 56 // approximate queries. Decode a reasonable frame. 57 _sender_decode_offset = DebugInformationRecorder::serialized_null; 58 _method = methodHandle(_code->method()); 59 _bci = InvocationEntryBci; 60 _reexecute = false; 61 _locals_decode_offset = DebugInformationRecorder::serialized_null; 62 _expressions_decode_offset = DebugInformationRecorder::serialized_null; 63 _monitors_decode_offset = DebugInformationRecorder::serialized_null; 64 } else { 65 // decode header 66 DebugInfoReadStream* stream = stream_at(decode_offset()); 67 68 _sender_decode_offset = stream->read_int(); 69 _method = methodHandle((methodOop) stream->read_oop()); 70 _bci = stream->read_bci_and_reexecute(_reexecute); 71 72 // decode offsets for body and sender 73 _locals_decode_offset = stream->read_int(); 74 _expressions_decode_offset = stream->read_int(); 75 _monitors_decode_offset = stream->read_int(); 76 } 77 } 78 79 80 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { 81 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; 82 DebugInfoReadStream* stream = stream_at(decode_offset); 83 int length = stream->read_int(); 84 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); 85 for (int index = 0; index < length; index++) { 86 result->push(ScopeValue::read_from(stream)); 87 } 88 return result; 89 } 90 91 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { 92 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; 93 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); 94 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); 95 int length = stream->read_int(); 96 for (int index = 0; index < length; index++) { 97 // Objects values are pushed to 'result' array during read so that 98 // object's fields could reference it (OBJECT_ID_CODE). 99 (void)ScopeValue::read_from(stream); 100 } 101 assert(result->length() == length, "inconsistent debug information"); 102 return result; 103 } 104 105 106 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { 107 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; 108 DebugInfoReadStream* stream = stream_at(decode_offset); 109 int length = stream->read_int(); 110 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); 111 for (int index = 0; index < length; index++) { 112 result->push(new MonitorValue(stream)); 113 } 114 return result; 115 } 116 117 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { 118 return new DebugInfoReadStream(_code, decode_offset, _objects); 119 } 120 121 GrowableArray<ScopeValue*>* ScopeDesc::locals() { 122 return decode_scope_values(_locals_decode_offset); 123 } 124 125 GrowableArray<ScopeValue*>* ScopeDesc::expressions() { 126 return decode_scope_values(_expressions_decode_offset); 127 } 128 129 GrowableArray<MonitorValue*>* ScopeDesc::monitors() { 130 return decode_monitor_values(_monitors_decode_offset); 131 } 132 133 GrowableArray<ScopeValue*>* ScopeDesc::objects() { 134 return _objects; 135 } 136 137 bool ScopeDesc::is_top() const { 138 return _sender_decode_offset == DebugInformationRecorder::serialized_null; 139 } 140 141 ScopeDesc* ScopeDesc::sender() const { 142 if (is_top()) return NULL; 143 return new ScopeDesc(this); 144 } 145 146 147 #ifndef PRODUCT 148 149 void ScopeDesc::print_value_on(outputStream* st) const { 150 tty->print(" "); 151 method()()->print_short_name(st); 152 int lineno = method()->line_number_from_bci(bci()); 153 if (lineno != -1) { 154 st->print_cr("@%d (line %d)", bci(), lineno); 155 } else { 156 st->print_cr("@%d", bci()); 157 } 158 } 159 160 void ScopeDesc::print_on(outputStream* st) const { 161 print_on(st, NULL); 162 } 163 164 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { 165 // header 166 if (pd != NULL) { 167 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset()); 168 } 169 170 print_value_on(st); 171 // decode offsets 172 if (WizardMode) { 173 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin()); 174 st->print_cr(" offset: %d", _decode_offset); 175 st->print_cr(" bci: %d", bci()); 176 st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); 177 st->print_cr(" locals: %d", _locals_decode_offset); 178 st->print_cr(" stack: %d", _expressions_decode_offset); 179 st->print_cr(" monitor: %d", _monitors_decode_offset); 180 st->print_cr(" sender: %d", _sender_decode_offset); 181 } 182 // locals 183 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); 184 if (l != NULL) { 185 tty->print_cr(" Locals"); 186 for (int index = 0; index < l->length(); index++) { 187 st->print(" - l%d: ", index); 188 l->at(index)->print_on(st); 189 st->cr(); 190 } 191 } 192 } 193 // expressions 194 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); 195 if (l != NULL) { 196 st->print_cr(" Expression stack"); 197 for (int index = 0; index < l->length(); index++) { 198 st->print(" - @%d: ", index); 199 l->at(index)->print_on(st); 200 st->cr(); 201 } 202 } 203 } 204 // monitors 205 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); 206 if (l != NULL) { 207 st->print_cr(" Monitor stack"); 208 for (int index = 0; index < l->length(); index++) { 209 st->print(" - @%d: ", index); 210 l->at(index)->print_on(st); 211 st->cr(); 212 } 213 } 214 } 215 216 #ifdef COMPILER2 217 if (DoEscapeAnalysis && is_top() && _objects != NULL) { 218 tty->print_cr("Objects"); 219 for (int i = 0; i < _objects->length(); i++) { 220 ObjectValue* sv = (ObjectValue*) _objects->at(i); 221 tty->print(" - %d: ", sv->id()); 222 sv->print_fields_on(tty); 223 tty->cr(); 224 } 225 } 226 #endif // COMPILER2 227 } 228 229 #endif 230 231 void ScopeDesc::verify() { 232 ResourceMark rm; 233 guarantee(method()->is_method(), "type check"); 234 235 // check if we have any illegal elements on the expression stack 236 { GrowableArray<ScopeValue*>* l = expressions(); 237 if (l != NULL) { 238 for (int index = 0; index < l->length(); index++) { 239 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); 240 } 241 } 242 } 243 }