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annotate src/tests/gov/nasa/jpf/test/mc/threads/OldClassicTest.java @ 0:61d41facf527

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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.test.mc.threads;
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19
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20 import gov.nasa.jpf.util.test.TestJPF;
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21
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22 import org.junit.Test;
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23
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24 public class OldClassicTest extends TestJPF {
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25
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26 /**************************** tests **********************************/
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27 class Event {
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28
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29 int count = 0;
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30
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31 public synchronized void signal_event() {
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32 count = (count + 1) % 3;
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33 notifyAll();
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34 }
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35
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36 public synchronized void wait_for_event() {
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37 try {
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38 wait();
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39 } catch (InterruptedException e) {
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40 }
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41 }
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42 }
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43
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44 class FirstTask extends java.lang.Thread {
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45
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46 Event event1;
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47 Event event2;
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48 int count = 0;
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49
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50 public FirstTask(Event e1, Event e2) {
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51 this.event1 = e1;
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52 this.event2 = e2;
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53 }
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54
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55 @Override
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56 public void run() {
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57 count = event1.count;
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58
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59 while (true) {
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60 if (count == event1.count) {
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61 //assert (count == event1.count);
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62 event1.wait_for_event();
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63 }
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64 count = event1.count;
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65 event2.signal_event();
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66 }
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67 }
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68 }
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69
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70 class SecondTask extends java.lang.Thread {
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71
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72 Event event1;
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73 Event event2;
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74 int count = 0;
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75
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76 public SecondTask(Event e1, Event e2) {
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77 this.event1 = e1;
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78 this.event2 = e2;
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79 }
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80
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81 @Override
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82 public void run() {
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83 count = event2.count;
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84
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85 while (true) {
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86 event1.signal_event();
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87 if (count == event2.count) {
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88 //assert (count == event2.count);
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89 event2.wait_for_event();
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90 }
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91 count = event2.count;
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92 }
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93 }
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94 }
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95
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96 public void run() {
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97 Event new_event1 = new Event();
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98 Event new_event2 = new Event();
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99
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100 FirstTask task1 = new FirstTask(new_event1, new_event2);
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101 SecondTask task2 = new SecondTask(new_event1, new_event2);
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102
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103 task1.start();
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104 task2.start();
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105
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106 }
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107
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108 /**
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109 * Tests running the Crossing example with no heuristics, i.e., with the
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110 * default DFS.
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111 */
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112 @Test
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113 public void testDFSearch() {
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114 if (verifyDeadlock()) {
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115 run();
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116 }
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117 }
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118
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119 /**
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120 * Tests running the Crossing example with BFS heuristic.
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121 */
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122 @Test
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123 public void testBFSHeuristic() {
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124 if (verifyDeadlock("+search.class=gov.nasa.jpf.search.heuristic.BFSHeuristic")) {
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125 run();
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126 }
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127 }
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128 }