private Absy GetNextCmd(ExecutionState state)
{
var nextCmd = state.GetCurrentStackFrame().CurrentInstruction.Clone();
nextCmd.MoveNext();
return(nextCmd.Current);
}
public override Expr VisitOldExpr(OldExpr node)
{
var oldGlobals = State.GetCurrentStackFrame().OldGlobals;
Debug.Assert(oldGlobals != null, "Old Globals should not be null!");
Debug.Assert(node.Expr is IdentifierExpr && (node.Expr as IdentifierExpr).Decl is GlobalVariable, "Unexpected expression in OldExpr");
var GV = (node.Expr as IdentifierExpr).Decl as GlobalVariable;
if (GV == null)
{
throw new InvalidOperationException("Visited OldExpr but child node was not the expected type");
}
Debug.Assert(oldGlobals.ContainsKey(GV), "A global variable is missing from the Current stackframe's list of OldGlobals");
return(oldGlobals[GV]);
}
private bool TerminateIfDepthExceeded(ExecutionState state)
{
if (state.ExplicitBranchDepth > MaxDepth)
{
// Don't remove from the UnderlyingStateScheduler here as it might not have been added to the UnderlyingStateScheduler
Debug.Assert(TheExecutor != null, "TheExecutor cannot be null");
// Estimate where we terminate
var programLoc = state.GetCurrentStackFrame().CurrentInstruction.Current.GetProgramLocation();
TheExecutor.TerminateState(state, new TerminatedWithDisallowedExplicitBranchDepth(programLoc), /*removeFromStateScheduler=*/ false);
return(true);
}
else
{
return(false);
}
}
