Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/bytecode/INVOKESTATIC.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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children db918c531e6d
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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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.jvm.bytecode;
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19
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20
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21 import gov.nasa.jpf.vm.ClassInfo;
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22 import gov.nasa.jpf.vm.ClassLoaderInfo;
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23 import gov.nasa.jpf.vm.ElementInfo;
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24 import gov.nasa.jpf.vm.Instruction;
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25 import gov.nasa.jpf.vm.LoadOnJPFRequired;
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26 import gov.nasa.jpf.vm.MethodInfo;
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27 import gov.nasa.jpf.vm.StaticElementInfo;
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28 import gov.nasa.jpf.vm.ThreadInfo;
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29 import gov.nasa.jpf.vm.Types;
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30
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31
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32 /**
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33 * Invoke a class (static) method
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34 * ..., [arg1, [arg2 ...]] => ...
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35 */
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36 public class INVOKESTATIC extends JVMInvokeInstruction {
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37 ClassInfo ci;
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38
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39 protected INVOKESTATIC (String clsDescriptor, String methodName, String signature){
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40 super(clsDescriptor, methodName, signature);
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41 }
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42
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43 protected ClassInfo getClassInfo () {
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44 if (ci == null) {
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45 ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname);
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46 }
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47 return ci;
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48 }
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49
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50 @Override
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51 public int getByteCode () {
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52 return 0xB8;
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53 }
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54
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55 @Override
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56 public String toPostExecString(){
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57 StringBuilder sb = new StringBuilder();
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58 sb.append(getMnemonic());
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59 sb.append(' ');
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60 sb.append( invokedMethod.getFullName());
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61
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62 if (invokedMethod.isMJI()){
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63 sb.append(" [native]");
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64 }
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65
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66 return sb.toString();
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67
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68 }
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69
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70 public StaticElementInfo getStaticElementInfo (){
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71 return getClassInfo().getStaticElementInfo();
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72 }
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73
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74 public int getClassObjectRef(){
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75 return getClassInfo().getStaticElementInfo().getClassObjectRef();
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76 }
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77
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78 @Override
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79 public Instruction execute (ThreadInfo ti) {
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80 MethodInfo callee;
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81
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82 try {
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83 callee = getInvokedMethod(ti);
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84 } catch (LoadOnJPFRequired lre) {
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85 return ti.getPC();
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86 }
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87
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88 if (callee == null) {
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89 return ti.createAndThrowException("java.lang.NoSuchMethodException", cname + '.' + mname);
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90 }
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91
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92 // this can be actually different than (can be a base)
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93 ClassInfo ciCallee = callee.getClassInfo();
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94
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95 if (ciCallee.pushRequiredClinits(ti)) {
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96 // do class initialization before continuing
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97 // note - this returns the next insn in the topmost clinit that just got pushed
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98 return ti.getPC();
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99 }
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100
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101 if (callee.isSynchronized()) {
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102 ElementInfo ei = ciCallee.getClassObject();
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103 ei = ti.getScheduler().updateObjectSharedness(ti, ei, null); // locks most likely belong to shared objects
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104
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105 if (reschedulesLockAcquisition(ti, ei)){
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106 return this;
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107 }
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108 }
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109
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110 setupCallee( ti, callee); // this creates, initializes and pushes the callee StackFrame
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111
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112 return ti.getPC(); // we can't just return the first callee insn if a listener throws an exception
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113 }
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114
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115 @Override
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116 public MethodInfo getInvokedMethod(){
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117 if (invokedMethod != null){
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118 return invokedMethod;
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119 } else {
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120 // Hmm, this would be pre-exec, but if the current thread is not the one executing the insn
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121 // this might result in false sharedness of the class object
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122 return getInvokedMethod( ThreadInfo.getCurrentThread());
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123 }
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124 }
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125
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126 @Override
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127 public MethodInfo getInvokedMethod (ThreadInfo ti){
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128 if (invokedMethod == null) {
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129 ClassInfo clsInfo = getClassInfo();
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130 if (clsInfo != null){
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131 MethodInfo callee = clsInfo.getMethod(mname, true);
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132 if (callee != null){
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133 ClassInfo ciCallee = callee.getClassInfo(); // might be a superclass of ci, i.e. not what is referenced in the insn
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134
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135 if (!ciCallee.isRegistered()){
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136 // if it wasn't registered yet, classLoaded listeners didn't have a chance yet to modify it..
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137 ciCallee.registerClass(ti);
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138 // .. and might replace/remove MethodInfos
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139 callee = clsInfo.getMethod(mname, true);
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140 }
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141 invokedMethod = callee;
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142 }
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143 }
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144 }
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145 return invokedMethod;
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146 }
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147
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148 // can be different thatn the ci - method can be in a superclass
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149 public ClassInfo getInvokedClassInfo(){
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150 return getInvokedMethod().getClassInfo();
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151 }
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152
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153 public String getInvokedClassName(){
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154 return getInvokedClassInfo().getName();
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155 }
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156
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157 @Override
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158 public int getArgSize () {
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159 if (argSize < 0) {
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160 argSize = Types.getArgumentsSize(signature);
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161 }
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162
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163 return argSize;
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164 }
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165
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166
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167 @Override
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168 public String toString() {
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169 // methodInfo not set outside real call context (requires target object)
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170 return "invokestatic " + cname + '.' + mname;
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171 }
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172
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173 @Override
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174 public Object getFieldValue (String id, ThreadInfo ti) {
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175 return getClassInfo().getStaticFieldValueObject(id);
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176 }
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177
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178 @Override
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179 public void accept(JVMInstructionVisitor insVisitor) {
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180 insVisitor.visit(this);
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181 }
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182
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183 @Override
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184 public Instruction typeSafeClone(MethodInfo mi) {
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185 INVOKESTATIC clone = null;
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186
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187 try {
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188 clone = (INVOKESTATIC) super.clone();
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189
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190 // reset the method that this insn belongs to
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191 clone.mi = mi;
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192
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193 clone.invokedMethod = null;
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194 clone.lastObj = Integer.MIN_VALUE;
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195 clone.ci = null;
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196 } catch (CloneNotSupportedException e) {
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197 e.printStackTrace();
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198 }
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199
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200 return clone;
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201 }
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parents:
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202 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
203