Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/jvm/bytecode/NEWARRAY.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.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.StackFrame; |
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26 import gov.nasa.jpf.vm.ThreadInfo; |
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27 import gov.nasa.jpf.vm.Types; |
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28 |
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29 |
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30 /** |
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31 * Create new array |
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32 * ..., count => ..., arrayref |
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33 */ |
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34 public class NEWARRAY extends NewArrayInstruction { |
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35 |
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36 public NEWARRAY(int typeCode) { |
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37 type = Types.getElementDescriptorOfType(typeCode); |
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38 } |
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39 |
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40 @Override |
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41 public Instruction execute (ThreadInfo ti) { |
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42 StackFrame frame = ti.getModifiableTopFrame(); |
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43 |
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44 arrayLength = frame.pop(); |
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45 Heap heap = ti.getHeap(); |
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46 |
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47 if (arrayLength < 0){ |
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48 return ti.createAndThrowException("java.lang.NegativeArraySizeException"); |
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49 } |
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50 |
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51 // there is no clinit for array classes, but we still have to create a class object |
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52 // since its a builtin class, we also don't have to bother with NoClassDefFoundErrors |
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53 String clsName = "[" + type; |
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54 ClassInfo ci = ClassLoaderInfo.getCurrentResolvedClassInfo(clsName); |
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55 |
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56 if (!ci.isRegistered()) { |
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57 ci.registerClass(ti); |
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58 ci.setInitialized(); |
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59 } |
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60 |
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61 if (heap.isOutOfMemory()) { // simulate OutOfMemoryError |
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62 return ti.createAndThrowException("java.lang.OutOfMemoryError", |
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63 "trying to allocate new " + |
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64 getTypeName() + |
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65 "[" + arrayLength + "]"); |
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66 } |
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67 |
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68 ElementInfo eiArray = heap.newArray(type, arrayLength, ti); |
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69 int arrayRef = eiArray.getObjectRef(); |
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70 |
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71 frame.pushRef(arrayRef); |
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72 |
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73 return getNext(ti); |
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74 } |
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75 |
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76 @Override |
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77 public int getLength() { |
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78 return 2; // opcode, atype |
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79 } |
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80 |
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81 @Override |
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82 public int getByteCode () { |
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83 return 0xBC; |
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84 } |
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85 |
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86 @Override |
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87 public void accept(JVMInstructionVisitor insVisitor) { |
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88 insVisitor.visit(this); |
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89 } |
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90 |
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91 @Override |
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92 public String toString() { |
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93 StringBuilder sb = new StringBuilder(); |
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94 sb.append("newarray "); |
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95 sb.append(getTypeName()); |
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96 sb.append('['); |
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97 if (arrayLength >=0){ |
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98 sb.append(arrayLength); |
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99 } |
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100 sb.append(']'); |
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101 |
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102 return sb.toString(); |
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103 } |
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104 } |