private void extendCallSink(ExtensionSinkPoint point, FlowOutputSet inSet)
{
inSet.StartTransaction();
inSet.Extend(point.OwningExtension.Owner.OutSet);
//Services.FlowResolver.CallDispatchMerge(_inSet, OwningExtension.Branches);
inSet.CommitTransaction();
}
/// <summary>
/// Initializes a new instance of the <see cref="ForwardAnalysisBase" /> class.
/// Create forward analysis object for given entry method graph.
/// </summary>
/// <param name="entryMethodGraph">Control flow graph of method which is entry point of analysis</param>
/// <param name="createSnapshotDelegate">Method that creates a snapshot used during analysis</param>
public ForwardAnalysisBase(Weverca.ControlFlowGraph.ControlFlowGraph entryMethodGraph, CreateSnapshot createSnapshotDelegate)
{
_createSnapshotDelegate = createSnapshotDelegate;
WideningLimit = int.MaxValue;
SimplifyLimit = int.MaxValue;
EntryInput = createEmptySet();
EntryInput.StartTransaction();
EntryCFG = entryMethodGraph;
}
private void extendCallExtension(ExtensionPoint point, FlowOutputSet inSet)
{
inSet.StartTransaction();
if (point.Type == ExtensionType.ParallelCall)
{
inSet.ExtendAsCall(point.Caller.OutSet, point.Graph, point.Flow.CalledObject, point.Flow.Arguments);
}
else
{
inSet.Extend(point.Caller.OutSet);
}
inSet.CommitTransaction();
}
private void setOrderedArguments(FlowOutputSet callInput, IEnumerable <ValuePoint> arguments, LangElement declaration)
{
var index = 0;
foreach (var arg in arguments)
{
var argVar = argument(index);
var argumentEntry = callInput.GetVariable(new VariableIdentifier(argVar));
//assign value for parameter
var argumentValue = arg.Value.ReadMemory(Output);
argumentEntry.WriteMemory(callInput.Snapshot, argumentValue);
++index;
}
}
private void setNamedArguments(FlowOutputSet callInput, CallSignature?callSignature, Signature signature, IEnumerable <ValuePoint> arguments)
{
int i = 0;
foreach (var arg in arguments)
{
if (i >= signature.FormalParams.Count)
{
break;
}
var param = signature.FormalParams [i];
var argumentVar = callInput.GetVariable(new VariableIdentifier(param.Name));
var argumentValue = arg.Value.ReadMemory(Output);
argumentVar.WriteMemory(callInput.Snapshot, argumentValue);
++i;
}
// TODO: if (arguments.Count() < signature.FormalParams.Count) and exists i > arguments.Count() signature.FormalParams[i].InitValue != null
}
private void standardExtend(IEnumerable <ProgramPointBase> inputs, FlowOutputSet inSet)
{
var inputSets = new List <FlowInputSet>();
foreach (var input in inputs)
{
var outSet = GetOutSet(input);
var assumeParent = input as AssumePoint;
if (outSet == null || (assumeParent != null && !assumeParent.Assumed))
{
continue;
}
inputSets.Add(outSet);
}
inSet.StartTransaction();
inSet.Extend(inputSets.ToArray());
inSet.CommitTransaction();
}
/// <summary>
/// Initialize program point with given input and output sets
/// </summary>
/// <param name="input">Input set of program point</param>
/// <param name="output">Output set of program point</param>
internal void Initialize(FlowOutputSet input, FlowOutputSet output)
{
if (_isInitialized)
{
throw new NotSupportedException("Initialization can be run only once");
}
_isInitialized = true;
_inSet = input;
_outSet = output;
if (_inSet.Snapshot != null)
{
//can be null in TestEntry
_inSet.Snapshot.Assistant.RegisterProgramPoint(this);
}
if (_outSet.Snapshot != null)
{
//can be null in TestEntry
_outSet.Snapshot.Assistant.RegisterProgramPoint(this);
}
}
/// <summary>
/// Extend snapshot as a call to function/method callee from given callerContext
/// </summary>
/// <param name="callerContext">The caller context.</param>
/// <param name="callee">Program point graph of the callee (identification of function or method that was called).</param>
/// <param name="thisObject">The this object.</param>
/// <param name="arguments">The arguments.</param>
internal void ExtendAsCall(FlowOutputSet callerContext, ProgramPointGraph callee, MemoryEntry thisObject, MemoryEntry[] arguments)
{
Snapshot.ExtendAsCall(getSnapshot(callerContext), callee, thisObject, arguments);
}
private void forwardExtend(ProgramPointBase point, IEnumerable <ProgramPointBase> inputs, FlowOutputSet inSet)
{
var extensionPoint = point as ExtensionPoint;
var sinkPoint = point as ExtensionSinkPoint;
if (extensionPoint != null)
{
extendCallExtension(extensionPoint, inSet);
}
else if (sinkPoint != null)
{
extendCallSink(sinkPoint, inSet);
}
else
{
standardExtend(inputs, inSet);
}
}