Mercurial > hg > Members > kono > jpf-core
diff src/main/gov/nasa/jpf/search/Simulation.java @ 0:61d41facf527
initial v8 import (history reset)
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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/main/gov/nasa/jpf/search/Simulation.java Fri Jan 23 10:14:01 2015 -0800 @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2014, United States Government, as represented by the + * Administrator of the National Aeronautics and Space Administration. + * All rights reserved. + * + * The Java Pathfinder core (jpf-core) platform is licensed under the + * Apache License, Version 2.0 (the "License"); you may not use this file except + * in compliance with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0. + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package gov.nasa.jpf.search; + + +import gov.nasa.jpf.Config; +import gov.nasa.jpf.vm.VM; + + +/** + * this is a straight execution pseudo-search - it doesn't search at + * all (i.e. it doesn't backtrack), but just behaves like a 'normal' VM, + * going forward() until there is no next state + * + * <2do> of course it doesn't quite behave like a normal VM, since it + * doesn't honor thread priorities yet (needs a special scheduler) + * + * <2do> it's not really clear to me how this differs from a 'PathSearch' + * other than using a different scheduler. Looks like there should be just one + * + * <2do> this needs to be updated & tested + * + */ +public class Simulation extends Search { + + public Simulation (Config config, VM vm) { + super(config, vm); + } + + @Override + public void search () { + int depth = 0; + + depth++; + + if (hasPropertyTermination()) { + return; + } + + notifySearchStarted(); + + while (!done) { + if (forward()) { + + if (currentError != null){ + notifyPropertyViolated(); + + if (hasPropertyTermination()) { + return; + } + } + + depth++; + + } else { // no next state + + // <2do> we could check for more things here. If the last insn wasn't + // the main return, or a System.exit() call, we could flag a JPFException + checkPropertyViolation(); + done = true; + } + } + notifySearchFinished(); + } +}