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 }