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annotate src/share/vm/code/debugInfo.cpp @ 7046:b6a8f2d23057

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VM support for deferred reads and writes: ScopeDesc, DebugInfo, DebugInfoRecorder
author Lukas Stadler <lukas.stadler@jku.at>
date Tue, 27 Nov 2012 13:43:04 +0100
parents da91efe96a93
children b8f261ba79c6
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1 /*
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2 * Copyright (c) 1997, 2012, 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/debugInfo.hpp"
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27 #include "code/debugInfoRec.hpp"
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28 #include "code/nmethod.hpp"
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29 #include "runtime/handles.inline.hpp"
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30
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31 // Comstructors
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32
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33 DebugInfoWriteStream::DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size)
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34 : CompressedWriteStream(initial_size) {
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35 _recorder = recorder;
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36 }
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37
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38 // Serializing oops
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39
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40 void DebugInfoWriteStream::write_handle(jobject h) {
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41 write_int(recorder()->oop_recorder()->find_index(h));
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42 }
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43
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44 void DebugInfoWriteStream::write_metadata(Metadata* h) {
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45 write_int(recorder()->oop_recorder()->find_index(h));
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46 }
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47
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48 ScopeValue* DebugInfoReadStream::read_object_value() {
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49 int id = read_int();
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50 #ifdef ASSERT
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51 assert(_obj_pool != NULL, "object pool does not exist");
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52 for (int i = _obj_pool->length() - 1; i >= 0; i--) {
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53 assert(((ObjectValue*) _obj_pool->at(i))->id() != id, "should not be read twice");
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54 }
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55 #endif
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56 ObjectValue* result = new ObjectValue(id);
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57 // Cache the object since an object field could reference it.
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58 _obj_pool->push(result);
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59 result->read_object(this);
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60 return result;
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61 }
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62
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63 ScopeValue* DebugInfoReadStream::get_cached_object() {
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64 int id = read_int();
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65 assert(_obj_pool != NULL, "object pool does not exist");
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66 for (int i = _obj_pool->length() - 1; i >= 0; i--) {
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67 ObjectValue* ov = (ObjectValue*) _obj_pool->at(i);
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68 if (ov->id() == id) {
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69 return ov;
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70 }
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71 }
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72 ShouldNotReachHere();
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73 return NULL;
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74 }
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75
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76 // Serializing scope values
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77
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78 enum { LOCATION_CODE = 0, CONSTANT_INT_CODE = 1, CONSTANT_OOP_CODE = 2,
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79 CONSTANT_LONG_CODE = 3, CONSTANT_DOUBLE_CODE = 4,
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80 OBJECT_CODE = 5, OBJECT_ID_CODE = 6,
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81 #ifdef GRAAL
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82 DEFERRED_READ_CODE = 7, DEFERRED_WRITE_CODE = 8
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83 #endif // GRAAL
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84 };
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85
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86 ScopeValue* ScopeValue::read_from(DebugInfoReadStream* stream) {
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87 ScopeValue* result = NULL;
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88 switch(stream->read_int()) {
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89 case LOCATION_CODE: result = new LocationValue(stream); break;
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90 case CONSTANT_INT_CODE: result = new ConstantIntValue(stream); break;
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91 case CONSTANT_OOP_CODE: result = new ConstantOopReadValue(stream); break;
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92 case CONSTANT_LONG_CODE: result = new ConstantLongValue(stream); break;
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93 case CONSTANT_DOUBLE_CODE: result = new ConstantDoubleValue(stream); break;
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94 case OBJECT_CODE: result = stream->read_object_value(); break;
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95 case OBJECT_ID_CODE: result = stream->get_cached_object(); break;
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96 #ifdef GRAAL
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97 case DEFERRED_READ_CODE: result = new DeferredReadValue(stream); break;
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98 case DEFERRED_WRITE_CODE: result = new DeferredWriteValue(stream); break;
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99 #endif // GRAAL
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100 default: ShouldNotReachHere();
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101 }
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102 return result;
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103 }
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104
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105 // LocationValue
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106
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107 LocationValue::LocationValue(DebugInfoReadStream* stream) {
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108 _location = Location(stream);
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109 }
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110
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111 void LocationValue::write_on(DebugInfoWriteStream* stream) {
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112 stream->write_int(LOCATION_CODE);
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113 location().write_on(stream);
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114 }
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115
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116 void LocationValue::print_on(outputStream* st) const {
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117 location().print_on(st);
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118 }
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119
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120 #ifdef GRAAL
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121
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122 // DeferredLocationValue
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123
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124 DeferredLocationValue::DeferredLocationValue(DebugInfoReadStream* stream) {
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125 _base = read_from(stream);
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126 _index = read_from(stream);
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127 _scale = stream->read_int();
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128 _disp = stream->read_long();
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129 }
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130
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131 void DeferredLocationValue::write_on(DebugInfoWriteStream* stream) {
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132 _base->write_on(stream);
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133 _index->write_on(stream);
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134 stream->write_int(_scale);
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135 stream->write_long(_disp);
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136 }
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137
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138 void DeferredLocationValue::print_on(outputStream* st) const {
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139 _base->print_on(st);
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140 _index->print_on(st);
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141 st->print("%i %i", _scale, _disp);
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142 }
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143
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144 // DeferredReadValue
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145
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146 DeferredReadValue::DeferredReadValue(DebugInfoReadStream* stream)
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147 : DeferredLocationValue(stream) {
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148 }
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149
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150 void DeferredReadValue::write_on(DebugInfoWriteStream* st) {
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151 DeferredLocationValue::write_on(st);
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152 }
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153
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154 void DeferredReadValue::print_on(outputStream* st) const {
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155 DeferredLocationValue::print_on(st);
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156 }
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157
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158 // DeferredWriteValue
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159
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160 DeferredWriteValue::DeferredWriteValue(DebugInfoReadStream* stream)
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161 : DeferredLocationValue(stream) {
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162 _value = read_from(stream);
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163 }
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164
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165 void DeferredWriteValue::write_on(DebugInfoWriteStream* st) {
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166 DeferredLocationValue::write_on(st);
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167 _value->write_on(st);
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168 }
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169
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170 void DeferredWriteValue::print_on(outputStream* st) const {
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171 DeferredLocationValue::print_on(st);
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172 _value->print_on(st);
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173 }
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174
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175 #endif // GRAAL
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176
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177 // ObjectValue
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178
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179 void ObjectValue::read_object(DebugInfoReadStream* stream) {
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180 _klass = read_from(stream);
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181 assert(_klass->is_constant_oop(), "should be constant java mirror oop");
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182 int length = stream->read_int();
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183 for (int i = 0; i < length; i++) {
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184 ScopeValue* val = read_from(stream);
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185 _field_values.append(val);
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186 }
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187 }
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188
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189 void ObjectValue::write_on(DebugInfoWriteStream* stream) {
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190 if (_visited) {
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191 stream->write_int(OBJECT_ID_CODE);
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192 stream->write_int(_id);
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193 } else {
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194 _visited = true;
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195 stream->write_int(OBJECT_CODE);
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196 stream->write_int(_id);
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197 _klass->write_on(stream);
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198 int length = _field_values.length();
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199 stream->write_int(length);
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200 for (int i = 0; i < length; i++) {
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201 _field_values.at(i)->write_on(stream);
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202 }
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203 }
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204 }
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205
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206 void ObjectValue::print_on(outputStream* st) const {
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207 st->print("obj[%d]", _id);
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208 }
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209
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210 void ObjectValue::print_fields_on(outputStream* st) const {
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211 #ifndef PRODUCT
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212 if (_field_values.length() > 0) {
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213 _field_values.at(0)->print_on(st);
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214 }
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215 for (int i = 1; i < _field_values.length(); i++) {
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216 st->print(", ");
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217 _field_values.at(i)->print_on(st);
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218 }
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219 #endif
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220 }
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221
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222 // ConstantIntValue
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223
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224 ConstantIntValue::ConstantIntValue(DebugInfoReadStream* stream) {
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225 _value = stream->read_signed_int();
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226 }
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227
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228 void ConstantIntValue::write_on(DebugInfoWriteStream* stream) {
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229 stream->write_int(CONSTANT_INT_CODE);
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230 stream->write_signed_int(value());
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231 }
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232
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233 void ConstantIntValue::print_on(outputStream* st) const {
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234 st->print("%d", value());
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235 }
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236
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237 // ConstantLongValue
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238
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239 ConstantLongValue::ConstantLongValue(DebugInfoReadStream* stream) {
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240 _value = stream->read_long();
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241 }
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242
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243 void ConstantLongValue::write_on(DebugInfoWriteStream* stream) {
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244 stream->write_int(CONSTANT_LONG_CODE);
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245 stream->write_long(value());
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246 }
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247
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248 void ConstantLongValue::print_on(outputStream* st) const {
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249 st->print(INT64_FORMAT, value());
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250 }
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251
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252 // ConstantDoubleValue
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253
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254 ConstantDoubleValue::ConstantDoubleValue(DebugInfoReadStream* stream) {
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255 _value = stream->read_double();
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256 }
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257
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258 void ConstantDoubleValue::write_on(DebugInfoWriteStream* stream) {
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259 stream->write_int(CONSTANT_DOUBLE_CODE);
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260 stream->write_double(value());
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261 }
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262
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263 void ConstantDoubleValue::print_on(outputStream* st) const {
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264 st->print("%f", value());
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265 }
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266
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267 // ConstantOopWriteValue
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268
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269 void ConstantOopWriteValue::write_on(DebugInfoWriteStream* stream) {
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270 assert(JNIHandles::resolve(value()) == NULL ||
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271 Universe::heap()->is_in_reserved(JNIHandles::resolve(value())),
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272 "Should be in heap");
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273 stream->write_int(CONSTANT_OOP_CODE);
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274 stream->write_handle(value());
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275 }
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276
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277 void ConstantOopWriteValue::print_on(outputStream* st) const {
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278 JNIHandles::resolve(value())->print_value_on(st);
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279 }
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280
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281
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282 // ConstantOopReadValue
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283
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284 ConstantOopReadValue::ConstantOopReadValue(DebugInfoReadStream* stream) {
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285 _value = Handle(stream->read_oop());
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286 assert(_value() == NULL ||
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287 Universe::heap()->is_in_reserved(_value()), "Should be in heap");
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288 }
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289
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290 void ConstantOopReadValue::write_on(DebugInfoWriteStream* stream) {
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291 ShouldNotReachHere();
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292 }
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293
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294 void ConstantOopReadValue::print_on(outputStream* st) const {
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295 value()()->print_value_on(st);
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296 }
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297
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298
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299 // MonitorValue
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300
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301 MonitorValue::MonitorValue(ScopeValue* owner, Location basic_lock, bool eliminated) {
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302 _owner = owner;
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303 _basic_lock = basic_lock;
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304 _eliminated = eliminated;
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305 }
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306
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307 MonitorValue::MonitorValue(DebugInfoReadStream* stream) {
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308 _basic_lock = Location(stream);
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309 _owner = ScopeValue::read_from(stream);
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310 _eliminated = (stream->read_bool() != 0);
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311 }
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312
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313 void MonitorValue::write_on(DebugInfoWriteStream* stream) {
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314 _basic_lock.write_on(stream);
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315 _owner->write_on(stream);
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316 stream->write_bool(_eliminated);
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317 }
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318
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319 #ifndef PRODUCT
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320 void MonitorValue::print_on(outputStream* st) const {
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321 st->print("monitor{");
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322 owner()->print_on(st);
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323 st->print(",");
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324 basic_lock().print_on(st);
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325 st->print("}");
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326 if (_eliminated) {
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327 st->print(" (eliminated)");
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328 }
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329 }
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330 #endif