Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/search/Simulation.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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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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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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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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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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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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12 * Unless required by applicable law or agreed to in writing, software
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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15 * See the License for the specific language governing permissions and
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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16 * limitations under the License.
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17 */
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18 package gov.nasa.jpf.search;
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19
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20
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21 import gov.nasa.jpf.Config;
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22 import gov.nasa.jpf.vm.VM;
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23
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24
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25 /**
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26 * this is a straight execution pseudo-search - it doesn't search at
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27 * all (i.e. it doesn't backtrack), but just behaves like a 'normal' VM,
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28 * going forward() until there is no next state
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29 *
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30 * <2do> of course it doesn't quite behave like a normal VM, since it
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31 * doesn't honor thread priorities yet (needs a special scheduler)
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32 *
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33 * <2do> it's not really clear to me how this differs from a 'PathSearch'
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34 * other than using a different scheduler. Looks like there should be just one
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35 *
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36 * <2do> this needs to be updated & tested
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37 *
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38 */
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39 public class Simulation extends Search {
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40
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41 public Simulation (Config config, VM vm) {
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42 super(config, vm);
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43 }
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44
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45 @Override
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46 public void search () {
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47 int depth = 0;
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48
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49 depth++;
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50
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51 if (hasPropertyTermination()) {
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52 return;
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53 }
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54
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55 notifySearchStarted();
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56
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57 while (!done) {
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58 if (forward()) {
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59
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60 if (currentError != null){
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61 notifyPropertyViolated();
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62
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63 if (hasPropertyTermination()) {
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64 return;
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65 }
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66 }
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67
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68 depth++;
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69
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70 } else { // no next state
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71
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72 // <2do> we could check for more things here. If the last insn wasn't
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73 // the main return, or a System.exit() call, we could flag a JPFException
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74 checkPropertyViolation();
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75 done = true;
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76 }
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77 }
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78 notifySearchFinished();
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79 }
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80 }