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1 /*
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2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_scopeDesc.cpp.incl"
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27
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28
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29 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset) {
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30 _code = code;
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31 _decode_offset = decode_offset;
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32 _objects = decode_object_values(obj_decode_offset);
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33 decode_body();
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34 }
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35
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36 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset) {
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37 _code = code;
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38 _decode_offset = decode_offset;
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39 _objects = decode_object_values(DebugInformationRecorder::serialized_null);
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40 decode_body();
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41 }
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42
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43
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44 ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
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45 _code = parent->_code;
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46 _decode_offset = parent->_sender_decode_offset;
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47 _objects = parent->_objects;
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48 decode_body();
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49 }
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50
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51
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52 void ScopeDesc::decode_body() {
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53 if (decode_offset() == DebugInformationRecorder::serialized_null) {
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54 // This is a sentinel record, which is only relevant to
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55 // approximate queries. Decode a reasonable frame.
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56 _sender_decode_offset = DebugInformationRecorder::serialized_null;
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57 _method = methodHandle(_code->method());
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58 _bci = InvocationEntryBci;
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59 _locals_decode_offset = DebugInformationRecorder::serialized_null;
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60 _expressions_decode_offset = DebugInformationRecorder::serialized_null;
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61 _monitors_decode_offset = DebugInformationRecorder::serialized_null;
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62 } else {
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63 // decode header
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64 DebugInfoReadStream* stream = stream_at(decode_offset());
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65
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66 _sender_decode_offset = stream->read_int();
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67 _method = methodHandle((methodOop) stream->read_oop());
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68 _bci = stream->read_bci();
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69 // decode offsets for body and sender
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70 _locals_decode_offset = stream->read_int();
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71 _expressions_decode_offset = stream->read_int();
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72 _monitors_decode_offset = stream->read_int();
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73 }
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74 }
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75
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76
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77 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
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78 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
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79 DebugInfoReadStream* stream = stream_at(decode_offset);
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80 int length = stream->read_int();
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81 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
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82 for (int index = 0; index < length; index++) {
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83 result->push(ScopeValue::read_from(stream));
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84 }
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85 return result;
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86 }
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87
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88 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
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89 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
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90 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
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91 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
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92 int length = stream->read_int();
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93 for (int index = 0; index < length; index++) {
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94 result->push(ScopeValue::read_from(stream));
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95 }
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96 assert(result->length() == length, "inconsistent debug information");
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97 return result;
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98 }
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99
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100
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101 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
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102 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
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103 DebugInfoReadStream* stream = stream_at(decode_offset);
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104 int length = stream->read_int();
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105 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
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106 for (int index = 0; index < length; index++) {
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107 result->push(new MonitorValue(stream));
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108 }
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109 return result;
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110 }
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111
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112 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
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113 return new DebugInfoReadStream(_code, decode_offset, _objects);
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114 }
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115
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116 GrowableArray<ScopeValue*>* ScopeDesc::locals() {
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117 return decode_scope_values(_locals_decode_offset);
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118 }
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119
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120 GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
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121 return decode_scope_values(_expressions_decode_offset);
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122 }
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123
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124 GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
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125 return decode_monitor_values(_monitors_decode_offset);
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126 }
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127
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128 GrowableArray<ScopeValue*>* ScopeDesc::objects() {
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129 return _objects;
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130 }
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131
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132 bool ScopeDesc::is_top() const {
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133 return _sender_decode_offset == DebugInformationRecorder::serialized_null;
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134 }
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135
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136 ScopeDesc* ScopeDesc::sender() const {
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137 if (is_top()) return NULL;
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138 return new ScopeDesc(this);
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139 }
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140
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141
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142 #ifndef PRODUCT
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143
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144 void ScopeDesc::print_value_on(outputStream* st) const {
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145 tty->print(" ");
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146 method()()->print_short_name(st);
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147 int lineno = method()->line_number_from_bci(bci());
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148 if (lineno != -1) {
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149 st->print_cr("@%d (line %d)", bci(), lineno);
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150 } else {
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151 st->print_cr("@%d", bci());
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152 }
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153 }
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154
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155 void ScopeDesc::print_on(outputStream* st) const {
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156 print_on(st, NULL);
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157 }
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158
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159 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
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160 // header
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161 if (pd != NULL) {
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162 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
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163 }
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164
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165 print_value_on(st);
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166 // decode offsets
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167 if (WizardMode) {
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168 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
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169 st->print_cr(" offset: %d", _decode_offset);
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170 st->print_cr(" bci: %d", bci());
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171 st->print_cr(" locals: %d", _locals_decode_offset);
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172 st->print_cr(" stack: %d", _expressions_decode_offset);
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173 st->print_cr(" monitor: %d", _monitors_decode_offset);
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174 st->print_cr(" sender: %d", _sender_decode_offset);
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175 }
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176 // locals
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177 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
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178 if (l != NULL) {
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179 tty->print_cr(" Locals");
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180 for (int index = 0; index < l->length(); index++) {
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181 st->print(" - l%d: ", index);
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182 l->at(index)->print_on(st);
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183 st->cr();
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184 }
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185 }
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186 }
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187 // expressions
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188 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
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189 if (l != NULL) {
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190 st->print_cr(" Expression stack");
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191 for (int index = 0; index < l->length(); index++) {
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192 st->print(" - @%d: ", index);
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193 l->at(index)->print_on(st);
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194 st->cr();
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195 }
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196 }
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197 }
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198 // monitors
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199 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
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200 if (l != NULL) {
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201 st->print_cr(" Monitor stack");
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202 for (int index = 0; index < l->length(); index++) {
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203 st->print(" - @%d: ", index);
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204 l->at(index)->print_on(st);
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205 st->cr();
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206 }
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207 }
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208 }
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209
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210 #ifdef COMPILER2
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211 if (DoEscapeAnalysis && is_top() && _objects != NULL) {
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212 tty->print_cr("Objects");
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213 for (int i = 0; i < _objects->length(); i++) {
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214 ObjectValue* sv = (ObjectValue*) _objects->at(i);
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215 tty->print(" - %d: ", sv->id());
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216 sv->print_fields_on(tty);
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217 tty->cr();
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218 }
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219 }
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220 #endif // COMPILER2
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221 }
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222
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223 #endif
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224
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225 void ScopeDesc::verify() {
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226 ResourceMark rm;
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227 guarantee(method()->is_method(), "type check");
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228
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229 // check if we have any illegal elements on the expression stack
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230 { GrowableArray<ScopeValue*>* l = expressions();
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231 if (l != NULL) {
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232 for (int index = 0; index < l->length(); index++) {
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233 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
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234 }
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235 }
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236 }
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237 }
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