Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/bytecode/ANEWARRAY.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.Heap;
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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.StackFrame;
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27 import gov.nasa.jpf.vm.ThreadInfo;
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28 import gov.nasa.jpf.vm.Types;
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29
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30
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31 /**
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32 * Create new array of reference
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33 * ..., count => ..., arrayref
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34 */
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35 public class ANEWARRAY extends NewArrayInstruction {
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36
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37 public ANEWARRAY (String typeDescriptor){
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38 type = Types.getTypeSignature(typeDescriptor, true);
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39 }
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40
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41 @Override
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42 public Instruction execute (ThreadInfo ti) {
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43 // resolve the component class first
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44 String compType = Types.getTypeName(type);
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45 if(Types.isReferenceSignature(type)) {
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46 try {
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47 ti.resolveReferencedClass(compType);
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48 } catch(LoadOnJPFRequired lre) {
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49 return ti.getPC();
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50 }
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51 }
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52
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53 // there is no clinit for array classes, but we still have to create a class object
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54 // since its a builtin class, we also don't have to bother with NoClassDefFoundErrors
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55 String clsName = "[" + type;
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56 ClassInfo ci = ClassLoaderInfo.getCurrentResolvedClassInfo(clsName);
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57
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58 if (!ci.isRegistered()) {
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59 ci.registerClass(ti);
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60 ci.setInitialized();
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61 }
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62
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63 StackFrame frame = ti.getModifiableTopFrame();
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64
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65 arrayLength = frame.pop();
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66 if (arrayLength < 0){
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67 return ti.createAndThrowException("java.lang.NegativeArraySizeException");
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68 }
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69
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70 Heap heap = ti.getHeap();
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71 if (heap.isOutOfMemory()) { // simulate OutOfMemoryError
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72 return ti.createAndThrowException("java.lang.OutOfMemoryError",
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73 "trying to allocate new " +
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74 Types.getTypeName(type) +
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75 "[" + arrayLength + "]");
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76 }
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77
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78 ElementInfo eiArray = heap.newArray(type, arrayLength, ti);
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79 int aRef = eiArray.getObjectRef();
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80
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81 // pushes the object reference on the top stack frame
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82 frame.push(aRef, true);
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83
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84 return getNext(ti);
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85 }
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86
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87 @Override
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88 public int getLength () {
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89 return 3; // opcode, index1, index2
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90 }
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91
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92 @Override
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93 public int getByteCode () {
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94 return 0xBD;
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95 }
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96
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97 @Override
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98 public void accept(JVMInstructionVisitor insVisitor) {
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99 insVisitor.visit(this);
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100 }
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101 }