Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/jvm/bytecode/PutHelper.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
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19 package gov.nasa.jpf.jvm.bytecode;
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20
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21 import gov.nasa.jpf.vm.ElementInfo;
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22 import gov.nasa.jpf.vm.FieldInfo;
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23 import gov.nasa.jpf.vm.StackFrame;
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24 import gov.nasa.jpf.vm.ThreadInfo;
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25
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26 /**
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27 * helper class to factor out common PUT code
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28 *
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29 * <2do> This is going to be moved into a Java 8 interface with default methods
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30 */
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31 public class PutHelper {
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32
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33 protected static boolean hasNewValue (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
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34 Object valAttr = null;
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35 int fieldSize = fi.getStorageSize();
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36
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37 if (fieldSize == 1){
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38 valAttr = frame.getOperandAttr();
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39 int val = frame.peek();
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40 if (eiFieldOwner.get1SlotField(fi) != val){
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41 return true;
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42 }
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43
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44 } else {
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45 valAttr = frame.getLongOperandAttr();
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46 long val = frame.peekLong();
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47 if (eiFieldOwner.get2SlotField(fi) != val){
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48 return true;
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49 }
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50 }
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51
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52 if (eiFieldOwner.getFieldAttr(fi) != valAttr){
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53 return true;
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54 }
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55
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56 return false;
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57 }
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58
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59 protected static int setReferenceField (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
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60 Object valAttr = frame.getOperandAttr();
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61 int val = frame.peek();
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62 eiFieldOwner.set1SlotField(fi, val);
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63 eiFieldOwner.setFieldAttr(fi, valAttr);
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64 return val;
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65 }
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66
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67 protected static long setField (ThreadInfo ti, StackFrame frame, ElementInfo eiFieldOwner, FieldInfo fi){
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68 int fieldSize = fi.getStorageSize();
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69
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70 if (fieldSize == 1){
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71 Object valAttr = frame.getOperandAttr();
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72 int val = frame.peek();
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73 eiFieldOwner.set1SlotField(fi, val);
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74 eiFieldOwner.setFieldAttr(fi, valAttr);
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75 return val;
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76
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77 } else {
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78 Object valAttr = frame.getLongOperandAttr();
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79 long val = frame.peekLong();
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80 eiFieldOwner.set2SlotField(fi, val);
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81 eiFieldOwner.setFieldAttr(fi, valAttr);
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82 return val;
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83 }
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84 }
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85 }