private bool HasInvariantField(VariableEffect p)
{
if (p.FieldChain.Count > 0)
{
Field f = p.FieldChain[p.FieldChain.Count - 1];
if (f.IsRep || (!(f is PTExtraField) && f.Type.IsValueType))
return true;
}
return false;
}
public void CheckReadEffectAdmissibility(Set<VariableEffect> readEffects) {
foreach (VariableEffect readEffect in readEffects) {
currentEffect = readEffect;
List<Field> chain = readEffect.FieldChain;
Variable v = readEffect.Variable;
if (chain == null) return;
if (v.Name.ToString().Equals("Global")) { // Global read is not admitted
if (chain.Count != 1 || !GlobalFieldIsPrivateOrImmutable(chain[0]))
this.IssueWarning();
}
ResetState();
if (v is Parameter && !(v is This)) { // chain accesses parameter
firstBoundMember = false;
outsideOwnedCone = true; // since we do not allow rep annotation on parameters
}
for (int i = 0; i < chain.Count; i++)
CheckField(chain[i]);
}
}
public Set<VariableEffect> ComputePathsFromVariableToHeapLocation(Set<IPTAnalysisNode> ns, Label lb)
{
Set<VariableEffect> variableEffects = new Set<VariableEffect>();
//if (WriteEffects.HasWriteEffects)
// Console.Out.WriteLine("Modifies:");
// Traverse every write effect
foreach (IPTAnalysisNode n in ns)
{
// Get the fields that are backward reachable from the modified field
Set<List<Edge>> paths = PointsToGraph.DFSPathFrom(n, false, true, true);
foreach (List<Edge> currentPath in paths)
{
currentPath.Reverse();
IPTAnalysisNode rootNode;
if (currentPath.Count > 0)
rootNode = currentPath[0].Src;
else
rootNode = n;
Variable v = null;
if (rootNode.IsVariableReference)
{
IVarRefNode vrNode = rootNode as IVarRefNode;
v = vrNode.ReferencedVariable;
if (!IsLocal(v))
continue;
//if (!(v is Parameter) && !v.Equals(PTGraph.GlobalScope))
// continue;
}
if (rootNode.Equals(GNode.nGBL))
{
v = PTGraph.GlobalScope;
}
/*
if (rootNode.IsParameterNode && ((PNode)rootNode).IsByValue)
{
bool fieldUpdate = !n.Field.Equals(PTGraph.asterisk);
foreach (Edge e in currentPath)
fieldUpdate = fieldUpdate || !e.Field.Equals(PTGraph.asterisk);
if (!fieldUpdate)
continue;
}
*/
string nodeName = rootNode.Name;
if (v != null)
{
VariableEffect vEffect = new VariableEffect(v, lb);
foreach (Edge e in currentPath)
{
if (!e.Field.Equals(PTGraph.asterisk))
{
vEffect.AddField(e.Field);
// lastField = e.Field;
}
}
variableEffects.Add(vEffect);
}
}
}
return variableEffects;
}
