public Tuple <DependencyPTGDomain, TimeSpan> AnalyzeMoveNextMethod()
{
AnalysisStats.extraAnalysisOverHead = new Stopwatch();
var sw = new Stopwatch();
sw.Start();
// 0) Analyze static fields.
// DIEGODIEGO: Should I also Include the points-to graph???
var staticConstructor = processToAnalyze.ProcessorClass.Methods.SingleOrDefault(m => m.Name.Value == ".cctor");
if (staticConstructor != null)
{
var cfgcCtor = staticConstructor.DoAnalysisPhases(host, sourceLocationProvider);
var rangeAnalysisCctor = new RangeAnalysis(cfgcCtor, staticConstructor);
rangeAnalysisCctor.Analyze();
}
// The following steps generates a PTG for the MoveNext method that takes into account the context of invocation
// This is the Producer entry method and the call to GetEnumerator which then is used in the Movenext method
// 1) Analyze the entry method that creates, populates and return the clousure
var cfgEntry = processToAnalyze.EntryMethod.DoAnalysisPhases(host, sourceLocationProvider);
var pointsToEntry = new SimplePointsToAnalysis(cfgEntry, processToAnalyze.EntryMethod);
var entryResult = pointsToEntry.Analyze();
var ptgOfEntry = entryResult[cfgEntry.Exit.Id].Output;
// 2) Call the GetEnumerator that may create a new clousure and polulate it
var myGetEnumResult = new LocalVariable("$_temp_it", processToAnalyze.EntryMethod)
{
Type = processToAnalyze.GetIteratorMethod.Type
};
ptgOfEntry.Add(myGetEnumResult);
var ptgAfterEnum = this.interprocManager.PTAInterProcAnalysis(ptgOfEntry, new List <IVariable> {
pointsToEntry.ReturnVariable
}, myGetEnumResult, processToAnalyze.GetIteratorMethod);
// These are the nodes that we want to protect/analyze
var protectedNodes = ptgOfEntry.Nodes.OfType <ParameterNode>()
.Where(n => IsScopeType(n.Type)).Select(n => new ProtectedRowNode(n, ProtectedRowNode.GetKind(n.Type)));
// Create tables representing the input and output tables
this.inputTable = new TraceableTable(protectedNodes.Single(pn => pn.RowKind == ProtectedRowKind.Input));
this.outputTable = new TraceableTable(protectedNodes.Single(pn => pn.RowKind == ProtectedRowKind.Output));
// 3) I bing the current PTG with the parameters of MoveNext method on the clousure
// Well... Inlining is broken we we added the Exceptional control graph. Let's avoid it
//var cfg = this.moveNextMethod.DoAnalysisPhases(host, this.GetMethodsToInline());
var cfg = this.interprocManager.GetCFG(processToAnalyze.MoveNextMethod);
cfg.PropagateExpressions(this.equalities);
// In general, the variable to bind is going to be pointsToEntry.ReturnVariable which is aliased with "$_temp_it" (myGetEnumResult)
SimplePointsToGraph calleePTG = InterproceduralManager.PTABindCallerCallee(ptgAfterEnum, new List <IVariable> {
myGetEnumResult
}, processToAnalyze.MoveNextMethod);
this.pointsToAnalyzer = new SimplePointsToAnalysis(cfg, processToAnalyze.MoveNextMethod, calleePTG);
// Now I analyze the Movenext method with the proper initialization
var result = this.AnalyzeScopeMethod(cfg, pointsToAnalyzer, protectedNodes);
sw.Stop();
//return Tuple.Create(result, sw.Elapsed - AnalysisStats.extraAnalysisOverHead.Elapsed);
return(Tuple.Create(result, sw.Elapsed));
}
public DependencyPTGDomain AnalyzeMoveNextMethod()
{
// 1) Analyze the entry method that creates, populates and return the clousure
var cfgEntry = entryMethod.DoAnalysisPhases(host);
var pointsToEntry = new IteratorPointsToAnalysis(cfgEntry, this.entryMethod); // , this.specialFields);
var entryResult = pointsToEntry.Analyze();
var ptgOfEntry = entryResult[cfgEntry.Exit.Id].Output;
// 2) Call the GetEnumerator that may create a new clousure and polulate it
var myGetEnumResult = new LocalVariable("$_temp_it")
{
Type = getEnumMethod.ReturnType
};
ptgOfEntry.Add(myGetEnumResult);
var ptgAfterEnum = this.interprocManager.PTAInterProcAnalysis(ptgOfEntry, new List <IVariable> {
pointsToEntry.ReturnVariable
}, myGetEnumResult, this.getEnumMethod);
// These are the nodes that we want to protect/analyze
var protectedNodes = ptgOfEntry.Nodes.OfType <ParameterNode>()
.Where(n => IsScopeType(n.Type)).Select(n => new ProtectedRowNode(n, ProtectedRowNode.GetKind(n.Type)));
// I no longer need this.
//var specialFields = cfgEntry.ForwardOrder[1].Instructions.OfType<StoreInstruction>()
// .Where(st => st.Result is InstanceFieldAccess).Select(st => new KeyValuePair<string,IVariable>((st.Result as InstanceFieldAccess).FieldName,st.Operand) );
//this.specialFields = specialFields.ToDictionary(item => item.Key, item => item.Value);
// 3) I bing the current PTG with the parameters of MoveNext method on the clousure
// Well... Inlining is broken we we added the Exceptional control graph. Let's avoid it
//var cfg = this.moveNextMethod.DoAnalysisPhases(host, this.GetMethodsToInline());
var cfg = this.interprocManager.GetCFG(this.moveNextMethod);
PropagateExpressions(cfg, this.equalities);
// In general, the variable to bind is going to be pointsToEntry.ReturnVariable which is aliased with "$_temp_it" (myGetEnumResult)
SimplePointsToGraph calleePTG = InterproceduralManager.PTABindCallerCallee(ptgAfterEnum, new List <IVariable> {
myGetEnumResult
}, this.moveNextMethod);
this.pointsToAnalyzer = new IteratorPointsToAnalysis(cfg, this.moveNextMethod, calleePTG);
//this.pta= this.interprocManager.PTABindAndRunInterProcAnalysis(ptgAfterEnum, new List<IVariable> { myGetEnumResult }, this.moveNextMethod, cfg);
//var pointsTo = new IteratorPointsToAnalysis(cfg, this.moveNextMethod, this.specialFields);
//this.ptAnalysisResult = pointsTo.Analyze();
// var pointsTo = new IteratorPointsToAnalysis(cfg, this.moveNextMethod, this.specialFields, ptgOfEntry);
// Now I analyze the Movenext method with the proper initialization
var result = this.AnalyzeScopeMethod(cfg, pointsToAnalyzer, protectedNodes);
return(result);
}
