Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/bytecode/INVOKESPECIAL.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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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.jvm.bytecode;
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19
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20 import gov.nasa.jpf.vm.ClassInfo;
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21 import gov.nasa.jpf.vm.ClassLoaderInfo;
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22 import gov.nasa.jpf.vm.ElementInfo;
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23 import gov.nasa.jpf.vm.Instruction;
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24 import gov.nasa.jpf.vm.LoadOnJPFRequired;
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25 import gov.nasa.jpf.vm.MethodInfo;
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26 import gov.nasa.jpf.vm.ThreadInfo;
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27
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28
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29 /**
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30 * Invoke instance method; special handling for superclass, private,
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31 * and instance initialization method invocations
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32 * ..., objectref, [arg1, [arg2 ...]] => ...
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33 *
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34 * invokedMethod is supposed to be constant (ClassInfo can't change)
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35 */
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36 public class INVOKESPECIAL extends InstanceInvocation {
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37
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38 public INVOKESPECIAL (String clsDescriptor, String methodName, String signature){
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39 super(clsDescriptor, methodName, signature);
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40 }
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41
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42
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43 @Override
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44 public int getByteCode () {
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45 return 0xB7;
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46 }
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47
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48 @Override
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49 public Instruction execute (ThreadInfo ti) {
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50 int argSize = getArgSize();
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51 int objRef = ti.getCalleeThis( argSize);
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52 lastObj = objRef;
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53
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54 // we don't have to check for NULL objects since this is either a ctor, a
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55 // private method, or a super method
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56
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57 MethodInfo callee;
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58 try {
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59 callee = getInvokedMethod(ti);
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60 } catch(LoadOnJPFRequired rre) {
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61 return ti.getPC();
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62 }
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63
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64 if (callee == null){
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65 return ti.createAndThrowException("java.lang.NoSuchMethodException", "Calling " + cname + '.' + mname);
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66 }
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67
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68 ElementInfo ei = ti.getElementInfo(objRef);
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69 if (callee.isSynchronized()){
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70 ei = ti.getScheduler().updateObjectSharedness(ti, ei, null); // locks most likely belong to shared objects
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71 if (reschedulesLockAcquisition(ti, ei)){
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72 return this;
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73 }
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74 }
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75
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76 setupCallee( ti, callee); // this creates, initializes and pushes the callee StackFrame
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77
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78 return ti.getPC(); // we can't just return the first callee insn if a listener throws an exception
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79 }
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80
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81 /**
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82 * If the current thread already owns the lock, then the current thread can go on.
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83 * For example, this is a recursive acquisition.
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84 */
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85 protected boolean isLockOwner(ThreadInfo ti, ElementInfo ei) {
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86 return ei.getLockingThread() == ti;
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87 }
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88
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89 /**
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90 * If the object will still be owned, then the current thread can go on.
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91 * For example, all but the last monitorexit for the object.
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92 */
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93 protected boolean isLastUnlock(ElementInfo ei) {
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94 return ei.getLockCount() == 1;
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95 }
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96
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97 /**
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98 * we can do some more caching here - the MethodInfo should be const
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99 */
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100 @Override
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101 public MethodInfo getInvokedMethod (ThreadInfo th) {
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102
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103 // since INVOKESPECIAL is only used for private methods and ctors,
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104 // we don't have to deal with null object calls
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105
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106 if (invokedMethod == null) {
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107 ClassInfo ci = ClassLoaderInfo.getCurrentResolvedClassInfo(cname);
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108 boolean recursiveLookup = (mname.charAt(0) != '<'); // no hierarchy lookup for <init>
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109 invokedMethod = ci.getMethod(mname, recursiveLookup);
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110 }
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111
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112 return invokedMethod; // we can store internally
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113 }
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114
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115 @Override
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116 public String toString() {
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117 return ("invokespecial " + cname + '.' + mname);
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118 }
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119
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120 @Override
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121 public Object getFieldValue (String id, ThreadInfo ti) {
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122 int objRef = getCalleeThis(ti);
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123 ElementInfo ei = ti.getElementInfo(objRef);
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124
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125 Object v = ei.getFieldValueObject(id);
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126
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127 if (v == null){ // try a static field
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128 v = ei.getClassInfo().getStaticFieldValueObject(id);
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129 }
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130
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131 return v;
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132 }
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133
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134 @Override
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135 public void accept(JVMInstructionVisitor insVisitor) {
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136 insVisitor.visit(this);
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137 }
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138 }