Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/vm/NotDeadlockedProperty.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 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package gov.nasa.jpf.vm;
19
20 import gov.nasa.jpf.Config;
21 import gov.nasa.jpf.GenericProperty;
22 import gov.nasa.jpf.search.Search;
23
24 import java.io.PrintWriter;
25 import java.io.StringWriter;
26
27 /**
28 * property class to check for no-runnable-threads conditions
29 */
30 public class NotDeadlockedProperty extends GenericProperty {
31 Search search;
32 ThreadInfo tiAtomic;
33
34 public NotDeadlockedProperty (Config conf, Search search) {
35 this.search = search;
36 }
37
38 @Override
39 public String getErrorMessage () {
40 VM vm = search.getVM();
41 StringWriter sw = new StringWriter();
42 PrintWriter pw = new PrintWriter(sw);
43
44 if (tiAtomic != null){
45 pw.println("blocked in atomic section:");
46 } else {
47 pw.println("deadlock encountered:");
48 }
49
50 ThreadInfo[] liveThreads = vm.getLiveThreads();
51 for (ThreadInfo ti : liveThreads) {
52 pw.print(" ");
53 if (ti == tiAtomic){
54 pw.print("ATOMIC ");
55 }
56 pw.println(ti.getStateDescription());
57 }
58
59 return sw.toString();
60 }
61
62 @Override
63 public boolean check (Search search, VM vm) {
64 if (vm.isDeadlocked()){
65 ThreadInfo ti = vm.getCurrentThread();
66 if (ti.isAtomic()){
67 tiAtomic = ti;
68 }
69 return false;
70 } else {
71 return true;
72 }
73 }
74
75 @Override
76 public void reset() {
77 tiAtomic = null;
78 }
79 }