/// <summary>
/// Returns the state corresponding to the
/// specified schedule step.
/// </summary>
/// <param name="key">ScheduleStep</param>
/// <returns>State</returns>
internal State this[ScheduleStep key]
{
get
{
return this.StateMap[key];
}
}
/// <summary>
/// Creates a nondeterministic boolean choice schedule step.
/// </summary>
/// <param name="index">Index</param>
/// <param name="choice">Choice</param>
/// <returns>ScheduleStep</returns>
internal static ScheduleStep CreateNondeterministicBooleanChoice(int index, bool choice)
{
var scheduleStep = new ScheduleStep();
scheduleStep.Index = index;
scheduleStep.Type = ScheduleStepType.NondeterministicChoice;
scheduleStep.BooleanChoice = choice;
scheduleStep.IntegerChoice = null;
scheduleStep.Previous = null;
scheduleStep.Next = null;
return(scheduleStep);
}
/// <summary>
/// Determines whether the specified System.Object is equal
/// to the current System.Object.
/// </summary>
/// <param name="obj">Object</param>
/// <returns>Boolean</returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
ScheduleStep step = obj as ScheduleStep;
if (step == null)
{
return(false);
}
return(Index == step.Index);
}
/// <summary>
/// Creates a schedule step.
/// </summary>
/// <param name="index">Index</param>
/// <param name="scheduledMachineId">Scheduled machine id</param>
/// <returns>ScheduleStep</returns>
internal static ScheduleStep CreateSchedulingChoice(int index, ulong scheduledMachineId)
{
var scheduleStep = new ScheduleStep();
scheduleStep.Index = index;
scheduleStep.Type = ScheduleStepType.SchedulingChoice;
scheduleStep.ScheduledMachineId = scheduledMachineId;
scheduleStep.BooleanChoice = null;
scheduleStep.IntegerChoice = null;
scheduleStep.Previous = null;
scheduleStep.Next = null;
return(scheduleStep);
}
/// <summary>
/// Captures a snapshot of the program state.
/// </summary>
/// <param name="scheduleStep">ScheduleStep</param>
internal void CaptureState(ScheduleStep scheduleStep)
{
var fingerprint = this.Runtime.GetProgramState();
var enabledMachines = this.Runtime.BugFinder.GetEnabledMachines();
var state = new State(fingerprint, enabledMachines, this.Runtime.LivenessChecker.GetMonitorStatus());
if (scheduleStep.Type == ScheduleStepType.SchedulingChoice)
{
IO.Debug("<LivenessDebug> Captured program state '{0}' at " +
"scheduling choice.", fingerprint.GetHashCode());
}
else if (scheduleStep.Type == ScheduleStepType.NondeterministicChoice &&
scheduleStep.BooleanChoice != null)
{
IO.Debug("<LivenessDebug> Captured program state '{0}' at nondeterministic " +
"choice '{1}'.", fingerprint.GetHashCode(), scheduleStep.BooleanChoice.Value);
}
else if (scheduleStep.Type == ScheduleStepType.FairNondeterministicChoice &&
scheduleStep.BooleanChoice != null)
{
IO.Debug("<LivenessDebug> Captured program state '{0}' at fair nondeterministic choice " +
"'{1}-{2}'.", fingerprint.GetHashCode(), scheduleStep.NondetId, scheduleStep.BooleanChoice.Value);
}
else if (scheduleStep.Type == ScheduleStepType.NondeterministicChoice &&
scheduleStep.IntegerChoice != null)
{
IO.Debug("<LivenessDebug> Captured program state '{0}' at nondeterministic " +
"choice '{1}'.", fingerprint.GetHashCode(), scheduleStep.IntegerChoice.Value);
}
var stateExists = this.StateMap.Values.Any(val => val.Fingerprint.Equals(fingerprint));
this.StateMap.Add(scheduleStep, state);
if (stateExists)
{
IO.Debug("<LivenessDebug> Detected potential infinite execution.");
this.Runtime.LivenessChecker.CheckLivenessAtTraceCycle(state.Fingerprint);
}
}
/// <summary>
/// Removes the specified schedule step from the cache.
/// </summary>
/// <param name="scheduleStep">ScheduleStep</param>
internal void Remove(ScheduleStep scheduleStep)
{
this.StateMap.Remove(scheduleStep);
}