/// <summary>
/// Captures a snapshot of the program state.
/// </summary>
/// <param name="traceStep">Trace step</param>
internal void CaptureState(TraceStep traceStep)
{
var fingerprint = PSharpRuntime.GetProgramState();
var enabledMachines = PSharpRuntime.BugFinder.GetEnabledMachines();
var state = new State(fingerprint, enabledMachines, PSharpRuntime.LivenessChecker.GetMonitorStatus());
if (traceStep.Type == TraceStepType.SchedulingChoice)
{
Output.Debug("<LivenessDebug> Captured program state '{0}' at " +
"scheduling choice.", fingerprint.GetHashCode());
}
else if (traceStep.Type == TraceStepType.NondeterministicChoice)
{
Output.Debug("<LivenessDebug> Captured program state '{0}' at nondeterministic " +
"choice '{1}'.", fingerprint.GetHashCode(), traceStep.Choice);
}
else if (traceStep.Type == TraceStepType.FairNondeterministicChoice)
{
Output.Debug("<LivenessDebug> Captured program state '{0}' at fair nondeterministic choice " +
"'{1}-{2}'.", fingerprint.GetHashCode(), traceStep.NondetId, traceStep.Choice);
}
var stateExists = this.StateMap.Values.Any(val => val.Fingerprint.Equals(fingerprint));
this.StateMap.Add(traceStep, state);
if (stateExists && PSharpRuntime.Configuration.CheckLiveness)
{
Output.Debug("<LivenessDebug> Detected potential infinite execution.");
PSharpRuntime.LivenessChecker.CheckLivenessAtTraceCycle(state.Fingerprint, this.StateMap);
}
}