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1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 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. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "code/debugInfoRec.hpp" |
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27 #include "code/pcDesc.hpp" |
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28 #include "code/scopeDesc.hpp" |
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29 #include "memory/resourceArea.hpp" |
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30 #include "oops/oop.inline.hpp" |
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31 #include "runtime/handles.inline.hpp" |
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32 |
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33 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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34 |
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35 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset, bool reexecute, bool return_oop) { |
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36 _code = code; |
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37 _decode_offset = decode_offset; |
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38 _objects = decode_object_values(obj_decode_offset); |
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39 _reexecute = reexecute; |
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40 _return_oop = return_oop; |
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41 decode_body(); |
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42 } |
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43 |
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44 ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, bool reexecute, bool return_oop) { |
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45 _code = code; |
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46 _decode_offset = decode_offset; |
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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 decode_body(); |
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51 } |
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52 |
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53 |
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54 ScopeDesc::ScopeDesc(const ScopeDesc* parent) { |
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55 _code = parent->_code; |
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56 _decode_offset = parent->_sender_decode_offset; |
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57 _objects = parent->_objects; |
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58 _reexecute = false; //reexecute only applies to the first scope |
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59 _return_oop = false; |
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60 decode_body(); |
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61 } |
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62 |
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63 |
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64 void ScopeDesc::decode_body() { |
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65 if (decode_offset() == DebugInformationRecorder::serialized_null) { |
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66 // This is a sentinel record, which is only relevant to |
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67 // approximate queries. Decode a reasonable frame. |
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68 _sender_decode_offset = DebugInformationRecorder::serialized_null; |
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69 _method = _code->method(); |
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70 _bci = InvocationEntryBci; |
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71 _locals_decode_offset = DebugInformationRecorder::serialized_null; |
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72 _expressions_decode_offset = DebugInformationRecorder::serialized_null; |
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73 _monitors_decode_offset = DebugInformationRecorder::serialized_null; |
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74 } else { |
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75 // decode header |
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76 DebugInfoReadStream* stream = stream_at(decode_offset()); |
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77 |
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78 _sender_decode_offset = stream->read_int(); |
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79 _method = stream->read_method(); |
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80 _bci = stream->read_bci(); |
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81 |
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82 // decode offsets for body and sender |
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83 _locals_decode_offset = stream->read_int(); |
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84 _expressions_decode_offset = stream->read_int(); |
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85 _monitors_decode_offset = stream->read_int(); |
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86 } |
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87 } |
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88 |
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89 |
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90 GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) { |
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91 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
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92 DebugInfoReadStream* stream = stream_at(decode_offset); |
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93 int length = stream->read_int(); |
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94 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length); |
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95 for (int index = 0; index < length; index++) { |
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96 result->push(ScopeValue::read_from(stream)); |
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97 } |
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98 return result; |
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99 } |
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100 |
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101 GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) { |
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102 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
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103 GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>(); |
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104 DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result); |
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105 int length = stream->read_int(); |
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106 for (int index = 0; index < length; index++) { |
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107 // Objects values are pushed to 'result' array during read so that |
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108 // object's fields could reference it (OBJECT_ID_CODE). |
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109 (void)ScopeValue::read_from(stream); |
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110 } |
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111 assert(result->length() == length, "inconsistent debug information"); |
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112 return result; |
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113 } |
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114 |
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115 |
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116 GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) { |
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117 if (decode_offset == DebugInformationRecorder::serialized_null) return NULL; |
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118 DebugInfoReadStream* stream = stream_at(decode_offset); |
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119 int length = stream->read_int(); |
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120 GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length); |
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121 for (int index = 0; index < length; index++) { |
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122 result->push(new MonitorValue(stream)); |
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123 } |
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124 return result; |
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125 } |
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126 |
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127 DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const { |
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128 return new DebugInfoReadStream(_code, decode_offset, _objects); |
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129 } |
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130 |
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131 GrowableArray<ScopeValue*>* ScopeDesc::locals() { |
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132 return decode_scope_values(_locals_decode_offset); |
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133 } |
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134 |
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135 GrowableArray<ScopeValue*>* ScopeDesc::expressions() { |
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136 return decode_scope_values(_expressions_decode_offset); |
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137 } |
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138 |
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139 GrowableArray<MonitorValue*>* ScopeDesc::monitors() { |
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140 return decode_monitor_values(_monitors_decode_offset); |
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141 } |
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142 |
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143 GrowableArray<ScopeValue*>* ScopeDesc::objects() { |
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144 return _objects; |
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145 } |
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146 |
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147 bool ScopeDesc::is_top() const { |
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148 return _sender_decode_offset == DebugInformationRecorder::serialized_null; |
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149 } |
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150 |
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151 ScopeDesc* ScopeDesc::sender() const { |
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152 if (is_top()) return NULL; |
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153 return new ScopeDesc(this); |
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154 } |
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155 |
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156 |
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157 #ifndef PRODUCT |
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158 |
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159 void ScopeDesc::print_value_on(outputStream* st) const { |
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160 tty->print(" "); |
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161 method()->print_short_name(st); |
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162 int lineno = method()->line_number_from_bci(bci()); |
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163 if (lineno != -1) { |
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164 st->print_cr("@%d (line %d)", bci(), lineno); |
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165 } else { |
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166 st->print_cr("@%d", bci()); |
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167 } |
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168 } |
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169 |
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170 void ScopeDesc::print_on(outputStream* st) const { |
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171 print_on(st, NULL); |
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172 } |
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173 |
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174 void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const { |
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175 // header |
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176 if (pd != NULL) { |
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177 tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset()); |
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178 } |
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179 |
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180 print_value_on(st); |
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181 // decode offsets |
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182 if (WizardMode) { |
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183 st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->content_begin()); |
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184 st->print_cr(" offset: %d", _decode_offset); |
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185 st->print_cr(" bci: %d", bci()); |
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186 st->print_cr(" reexecute: %s", should_reexecute() ? "true" : "false"); |
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187 st->print_cr(" locals: %d", _locals_decode_offset); |
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188 st->print_cr(" stack: %d", _expressions_decode_offset); |
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189 st->print_cr(" monitor: %d", _monitors_decode_offset); |
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190 st->print_cr(" sender: %d", _sender_decode_offset); |
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191 } |
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192 // locals |
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193 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals(); |
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194 if (l != NULL) { |
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195 tty->print_cr(" Locals"); |
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196 for (int index = 0; index < l->length(); index++) { |
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197 st->print(" - l%d: ", index); |
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198 l->at(index)->print_on(st); |
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199 st->cr(); |
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200 } |
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201 } |
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202 } |
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203 // expressions |
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204 { GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions(); |
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205 if (l != NULL) { |
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206 st->print_cr(" Expression stack"); |
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207 for (int index = 0; index < l->length(); index++) { |
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208 st->print(" - @%d: ", index); |
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209 l->at(index)->print_on(st); |
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210 st->cr(); |
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211 } |
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212 } |
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213 } |
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214 // monitors |
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215 { GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors(); |
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216 if (l != NULL) { |
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217 st->print_cr(" Monitor stack"); |
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218 for (int index = 0; index < l->length(); index++) { |
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219 st->print(" - @%d: ", index); |
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220 l->at(index)->print_on(st); |
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221 st->cr(); |
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222 } |
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223 } |
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224 } |
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225 |
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226 #ifdef COMPILER2 |
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227 if (DoEscapeAnalysis && is_top() && _objects != NULL) { |
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228 tty->print_cr("Objects"); |
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229 for (int i = 0; i < _objects->length(); i++) { |
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230 ObjectValue* sv = (ObjectValue*) _objects->at(i); |
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231 tty->print(" - %d: ", sv->id()); |
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232 sv->print_fields_on(tty); |
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233 tty->cr(); |
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234 } |
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235 } |
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236 #endif // COMPILER2 |
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237 } |
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238 |
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239 #endif |
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240 |
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241 void ScopeDesc::verify() { |
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242 ResourceMark rm; |
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243 guarantee(method()->is_method(), "type check"); |
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244 |
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245 // check if we have any illegal elements on the expression stack |
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246 { GrowableArray<ScopeValue*>* l = expressions(); |
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247 if (l != NULL) { |
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248 for (int index = 0; index < l->length(); index++) { |
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249 //guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal"); |
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250 } |
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251 } |
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252 } |
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253 } |