Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/vm/serialize/DynamicAbstractionSerializer.java @ 0:61d41facf527
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author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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1 /* |
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2 * Copyright (C) 2014, United States Government, as represented by the |
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3 * Administrator of the National Aeronautics and Space Administration. |
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4 * All rights reserved. |
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5 * |
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the |
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except |
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8 * in compliance with the License. You may obtain a copy of the License at |
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9 * |
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10 * http://www.apache.org/licenses/LICENSE-2.0. |
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11 * |
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12 * Unless required by applicable law or agreed to in writing, software |
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13 * distributed under the License is distributed on an "AS IS" BASIS, |
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 * See the License for the specific language governing permissions and |
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16 * limitations under the License. |
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17 */ |
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18 package gov.nasa.jpf.vm.serialize; |
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19 |
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20 import gov.nasa.jpf.Config; |
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21 import gov.nasa.jpf.JPF; |
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22 import gov.nasa.jpf.ListenerAdapter; |
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23 import gov.nasa.jpf.util.FieldSpec; |
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24 import gov.nasa.jpf.util.FinalBitSet; |
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25 import gov.nasa.jpf.util.JPFLogger; |
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26 import gov.nasa.jpf.util.StringSetMatcher; |
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27 import gov.nasa.jpf.vm.ArrayFields; |
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28 import gov.nasa.jpf.vm.ClassInfo; |
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29 import gov.nasa.jpf.vm.ClassLoaderInfo; |
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30 import gov.nasa.jpf.vm.ElementInfo; |
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31 import gov.nasa.jpf.vm.FieldInfo; |
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32 import gov.nasa.jpf.vm.Fields; |
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33 import gov.nasa.jpf.vm.MJIEnv; |
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34 import gov.nasa.jpf.vm.VM; |
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35 import gov.nasa.jpf.vm.MethodInfo; |
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36 import gov.nasa.jpf.vm.ReferenceArrayFields; |
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37 import gov.nasa.jpf.vm.StackFrame; |
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38 import gov.nasa.jpf.vm.StaticElementInfo; |
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39 import gov.nasa.jpf.vm.Statics; |
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40 |
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41 import java.util.LinkedList; |
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42 import java.util.List; |
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43 |
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44 /** |
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45 * a serializer that uses Abstraction objects stored as field attributes to |
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46 * obtain the values to hash. |
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47 */ |
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48 public class DynamicAbstractionSerializer extends FilteringSerializer { |
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49 |
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50 static JPFLogger logger = JPF.getLogger("gov.nasa.jpf.vm.serialize.DynamicAbstractionSerializer"); |
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51 |
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52 static class FieldAbstraction { |
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53 FieldSpec fspec; |
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54 Abstraction abstraction; |
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55 |
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56 FieldAbstraction(FieldSpec f, Abstraction a) { |
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57 fspec = f; |
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58 abstraction = a; |
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59 } |
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60 } |
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61 |
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62 public class Attributor extends ListenerAdapter { |
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63 |
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64 @Override |
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65 public void classLoaded(VM vm, ClassInfo loadedClass) { |
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66 |
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67 if (!loadedClass.isArray() && !loadedClass.isPrimitive()) { |
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68 |
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69 if (!fieldAbstractions.isEmpty()) { |
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70 for (FieldInfo fi : loadedClass.getDeclaredInstanceFields()) { |
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71 for (FieldAbstraction fabs : fieldAbstractions) { |
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72 if (fabs.fspec.matches(fi)) { |
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73 logger.info("setting instance field abstraction ", fabs.abstraction.getClass().getName(), |
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74 " for field ", fi.getFullName()); |
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75 fi.addAttr(fabs.abstraction); |
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76 } |
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77 } |
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78 } |
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79 |
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80 for (FieldInfo fi : loadedClass.getDeclaredStaticFields()) { |
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81 for (FieldAbstraction fabs : fieldAbstractions) { |
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82 if (fabs.fspec.matches(fi)) { |
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83 logger.info("setting static field abstraction ", fabs.abstraction.getClass().getName(), |
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84 " for field ", fi.getFullName()); |
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85 fi.addAttr(fabs.abstraction); |
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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 } |
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91 } |
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92 } |
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93 |
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94 protected StringSetMatcher includeClasses = null; // means all |
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95 protected StringSetMatcher excludeClasses = null; // means none |
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96 protected StringSetMatcher includeMethods = null; |
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97 protected StringSetMatcher excludeMethods = null; |
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98 |
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99 List<FieldAbstraction> fieldAbstractions; |
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100 |
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101 protected boolean processAllObjects; |
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102 protected boolean declaredFieldsOnly; |
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103 |
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104 |
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105 public DynamicAbstractionSerializer(Config conf) { |
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106 processAllObjects = conf.getBoolean("das.all_objects", true); |
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107 declaredFieldsOnly = conf.getBoolean("das.declared_fields", false); |
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108 |
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109 includeClasses = StringSetMatcher.getNonEmpty(conf.getStringArray("das.classes.include")); |
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110 excludeClasses = StringSetMatcher.getNonEmpty(conf.getStringArray("das.classes.exclude")); |
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111 |
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112 includeMethods = StringSetMatcher.getNonEmpty(conf.getStringArray("das.methods.include")); |
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113 excludeMethods = StringSetMatcher.getNonEmpty(conf.getStringArray("das.methods.exclude")); |
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114 |
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115 fieldAbstractions = getFieldAbstractions(conf); |
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116 } |
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117 |
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118 |
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119 protected List<FieldAbstraction> getFieldAbstractions(Config conf){ |
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120 List<FieldAbstraction> list = null; |
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121 |
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122 String[] fids = conf.getCompactTrimmedStringArray("das.fields"); |
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123 for (String id : fids) { |
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124 String keyPrefix = "das." + id; |
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125 String fs = conf.getString(keyPrefix + ".field"); |
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126 if (fs != null) { |
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127 FieldSpec fspec = FieldSpec.createFieldSpec(fs); |
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128 if (fspec != null) { |
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129 String aKey = keyPrefix + ".abstraction"; |
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130 Abstraction abstraction = conf.getInstance(aKey, Abstraction.class); |
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131 |
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132 logger.info("found field abstraction for ", fspec, " = ", abstraction.getClass().getName()); |
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133 |
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134 if (list == null){ |
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135 list = new LinkedList<FieldAbstraction>(); |
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136 } |
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137 |
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138 list.add(new FieldAbstraction(fspec, abstraction)); |
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139 } |
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140 } else { |
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141 logger.warning("no field spec for id: " + id); |
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142 } |
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143 } |
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144 |
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145 return list; |
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146 } |
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147 |
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148 @Override |
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149 public void attach (VM vm){ |
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150 super.attach(vm); |
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151 |
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152 if (fieldAbstractions != null){ |
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153 Attributor attributor = new Attributor(); |
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154 vm.addListener(attributor); |
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155 } |
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156 } |
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157 |
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158 |
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159 // note that we don't add the reference value here |
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160 @Override |
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161 public void processReference(int objref) { |
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162 if (objref != MJIEnv.NULL) { |
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163 ElementInfo ei = heap.get(objref); |
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164 if (!ei.isMarked()) { // only add objects once |
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165 ei.setMarked(); |
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166 refQueue.add(ei); |
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167 } |
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168 } |
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169 |
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170 // we DON'T add the reference value to the buffer here |
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171 } |
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172 |
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173 protected void processField(Fields fields, int[] slotValues, FieldInfo fi, FinalBitSet filtered) { |
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174 int off = fi.getStorageOffset(); |
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175 if (!filtered.get(off)) { |
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176 Abstraction a = fi.getAttr(Abstraction.class); |
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177 if (a != null) { |
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178 if (fi.is1SlotField()) { |
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179 if (fi.isReference()) { |
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180 int ref = fields.getReferenceValue(off); |
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181 buf.add(a.getAbstractObject(ref)); |
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182 |
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183 if (a.traverseObject(ref)) { |
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184 processReference(ref); |
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185 } |
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186 |
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187 } else if (fi.isFloatField()) { |
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188 buf.add(a.getAbstractValue(fields.getFloatValue(off))); |
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189 } else { |
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190 buf.add(a.getAbstractValue(fields.getIntValue(off))); |
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191 } |
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192 } else { // double or long |
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193 if (fi.isLongField()) { |
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194 buf.add(a.getAbstractValue(fields.getLongValue(off))); |
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195 } else { // got to be double |
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196 buf.add(a.getAbstractValue(fields.getDoubleValue(off))); |
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197 } |
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198 } |
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199 |
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200 } else { // no abstraction, fall back to concrete values |
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201 if (fi.is1SlotField()) { |
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202 if (fi.isReference()) { |
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203 int ref = slotValues[off]; |
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204 buf.add(ref); |
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205 processReference(ref); |
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206 |
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207 } else { |
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208 buf.add(slotValues[off]); |
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209 } |
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210 |
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211 } else { // double or long |
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212 buf.add(slotValues[off]); |
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213 buf.add(slotValues[off + 1]); |
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214 } |
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215 } |
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216 } |
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217 } |
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218 |
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219 // non-ignored class |
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220 @Override |
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221 protected void processArrayFields(ArrayFields fields) { |
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222 buf.add(fields.arrayLength()); |
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223 |
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224 if (fields.isReferenceArray()) { |
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225 int[] values = fields.asReferenceArray(); |
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226 for (int i = 0; i < values.length; i++) { |
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227 processReference(values[i]); |
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228 buf.add(values[i]); |
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229 } |
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230 } else { |
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231 fields.appendTo(buf); |
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232 } |
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233 } |
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234 |
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235 // for ignored class, to get all live objects |
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236 protected void processNamedInstanceReferenceFields(ClassInfo ci, Fields fields) { |
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237 FinalBitSet filtered = getInstanceFilterMask(ci); |
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238 FinalBitSet refs = getInstanceRefMask(ci); |
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239 int[] slotValues = fields.asFieldSlots(); // for non-attributed fields |
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240 |
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241 for (int i = 0; i < slotValues.length; i++) { |
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242 if (!filtered.get(i)) { |
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243 if (refs.get(i)) { |
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244 processReference(slotValues[i]); |
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245 } |
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246 } |
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247 } |
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248 } |
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249 |
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250 // for ignored class, to get all live objects |
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251 protected void processNamedStaticReferenceFields(ClassInfo ci, Fields fields) { |
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252 FinalBitSet filtered = getStaticFilterMask(ci); |
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253 FinalBitSet refs = getStaticRefMask(ci); |
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254 int[] slotValues = fields.asFieldSlots(); // for non-attributed fields |
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255 |
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256 for (int i = 0; i < slotValues.length; i++) { |
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257 if (!filtered.get(i)) { |
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258 if (refs.get(i)) { |
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259 processReference(slotValues[i]); |
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260 } |
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261 } |
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262 } |
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263 } |
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264 |
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265 // for ignored class, to get all live objects |
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266 protected void processReferenceArray(ReferenceArrayFields fields) { |
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267 int[] slotValues = fields.asReferenceArray(); |
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268 for (int i = 0; i < slotValues.length; i++) { |
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269 processReference(slotValues[i]); |
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270 } |
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271 } |
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272 |
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273 // non-ignored class |
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274 @Override |
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275 protected void processNamedFields(ClassInfo ci, Fields fields) { |
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276 FinalBitSet filtered = getInstanceFilterMask(ci); |
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277 int nFields = ci.getNumberOfInstanceFields(); |
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278 int[] slotValues = fields.asFieldSlots(); // for non-attributed fields |
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279 |
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280 for (int i = 0; i < nFields; i++) { |
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281 FieldInfo fi = ci.getInstanceField(i); |
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282 |
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283 if (declaredFieldsOnly && fi.getClassInfo() != ci) { |
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284 continue; |
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285 } |
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286 |
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287 processField(fields, slotValues, fi, filtered); |
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288 } |
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289 } |
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290 |
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291 // <2do> this should also allow abstraction of whole objects, so that |
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292 // we can hash combinations/relations of field values |
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293 @Override |
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294 public void process (ElementInfo ei) { |
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295 Fields fields = ei.getFields(); |
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296 ClassInfo ci = ei.getClassInfo(); |
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297 |
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298 if (StringSetMatcher.isMatch(ci.getName(), includeClasses, excludeClasses)) { |
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299 buf.add(ci.getUniqueId()); |
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300 |
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301 if (fields instanceof ArrayFields) { // not filtered |
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302 processArrayFields((ArrayFields) fields); |
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303 } else { // named fields, potentially filtered & abstracted via attributes |
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304 processNamedFields(ci, fields); |
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305 } |
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306 |
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307 } else { // ignored class |
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308 // we check for live non-ignored objects along all stack frames, so we should do the same for all objects |
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309 if (fields instanceof ArrayFields) { |
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310 if (fields instanceof ReferenceArrayFields) { |
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311 processReferenceArray((ReferenceArrayFields) fields); |
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312 } |
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313 } else { |
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314 processNamedInstanceReferenceFields(ci, fields); |
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315 } |
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316 } |
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317 } |
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318 |
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319 @Override |
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320 protected void serializeFrame (StackFrame frame) { |
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321 MethodInfo mi = frame.getMethodInfo(); |
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322 |
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323 if (StringSetMatcher.isMatch(mi.getFullName(), includeMethods, excludeMethods)){ |
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324 // <2do> should do frame abstraction here |
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325 super.serializeFrame(frame); |
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326 |
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327 } else { |
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328 if (processAllObjects) { |
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329 frame.visitReferenceSlots(this); |
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330 } |
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331 } |
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332 } |
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333 |
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334 @Override |
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335 protected void serializeClass (StaticElementInfo sei) { |
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336 ClassInfo ci = sei.getClassInfo(); |
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337 Fields fields = sei.getFields(); |
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338 |
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339 if (StringSetMatcher.isMatch(ci.getName(), includeClasses, excludeClasses)) { |
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340 buf.add(sei.getStatus()); |
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341 |
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342 FinalBitSet filtered = getStaticFilterMask(ci); |
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343 int[] slotValues = fields.asFieldSlots(); |
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344 |
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345 for (FieldInfo fi : ci.getDeclaredStaticFields()) { |
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346 processField(fields, slotValues, fi, filtered); |
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347 } |
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348 |
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349 } else { |
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350 // ignored class, but still process references to extract live objects |
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351 processNamedStaticReferenceFields(ci, fields); |
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352 } |
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353 } |
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354 |
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355 @Override |
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356 protected void serializeClassLoaders(){ |
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357 // we don't care about the number of classloaders |
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358 |
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359 for (ClassLoaderInfo cl : ks.classLoaders) { |
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360 if(cl.isAlive()) { |
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361 serializeStatics( cl.getStatics()); |
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362 } |
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363 } |
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364 } |
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365 |
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366 @Override |
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367 protected void serializeStatics(Statics statics){ |
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368 // we don't care about the number of statics entries |
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369 |
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370 for (StaticElementInfo sei : statics.liveStatics()) { |
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371 serializeClass(sei); |
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372 } |
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373 } |
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374 } |