gov.nasa.jpf.listener

Class SimpleIdleFilter

java.lang.Object

gov.nasa.jpf.ListenerAdapter

gov.nasa.jpf.listener.SimpleIdleFilter

All Implemented Interfaces:

JPFListener, PublisherExtension, SearchListener, VMListener

public class SimpleIdleFilter
extends ListenerAdapter

This is the simple version of IdleFilter. This one simply breaks all back-edges encountered to make sure JPF's partial-order reduction doesn't add meaningless transitions forever. This is our dual of the cycle-proviso in classic po-reduction theory. One can set how many back-edges to consider before breaking, but by default it is 1

Constructor Summary

Constructors

Constructor and Description
SimpleIdleFilter(Config config)

Method Summary

Modifier and Type	Method and Description
void	instructionExecuted(VM vm, ThreadInfo ti, Instruction nextInsn, Instruction executedInsn) VM has executed the next instruction (can be used to analyze branches, monitor PUTFIELD / GETFIELD and INVOKExx / RETURN instructions)
void	stateAdvanced(Search search) got the next state Note - this will be notified before any potential propertyViolated, in which case the currentError will be already set
void	stateBacktracked(Search search) state was backtracked one step

Methods inherited from class gov.nasa.jpf.ListenerAdapter

choiceGeneratorAdvanced, choiceGeneratorProcessed, choiceGeneratorRegistered, choiceGeneratorSet, classLoaded, exceptionBailout, exceptionHandled, exceptionThrown, executeInstruction, gcBegin, gcEnd, loadClass, methodEntered, methodExited, objectCreated, objectExposed, objectLocked, objectNotify, objectNotifyAll, objectReleased, objectShared, objectUnlocked, objectWait, propertyViolated, publishConstraintHit, publishFinished, publishProbe, publishPropertyViolation, publishStart, publishTransition, searchConstraintHit, searchFinished, searchProbed, searchStarted, stateProcessed, statePurged, stateRestored, stateStored, threadBlocked, threadInterrupted, threadNotified, threadScheduled, threadStarted, threadTerminated, threadWaiting, vmInitialized

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleIdleFilter

public SimpleIdleFilter(Config config)

Method Detail

stateAdvanced

public void stateAdvanced(Search search)

Description copied from interface: SearchListener

got the next state Note - this will be notified before any potential propertyViolated, in which case the currentError will be already set

Specified by:

stateAdvanced in interface SearchListener

Overrides:

stateAdvanced in class ListenerAdapter

stateBacktracked

public void stateBacktracked(Search search)

Description copied from interface: SearchListener

state was backtracked one step

Specified by:

stateBacktracked in interface SearchListener

Overrides:

stateBacktracked in class ListenerAdapter

instructionExecuted

public void instructionExecuted(VM vm,
                                ThreadInfo ti,
                                Instruction nextInsn,
                                Instruction executedInsn)

Description copied from interface: VMListener

VM has executed the next instruction (can be used to analyze branches, monitor PUTFIELD / GETFIELD and INVOKExx / RETURN instructions)

Specified by:

instructionExecuted in interface VMListener

Overrides:

instructionExecuted in class ListenerAdapter