private void analyze() {
Graph<T> DT = dom.dominatorTree();
Iterator<T> XS = DFS.iterateFinishTime(DT, new NonNullSingletonIterator<T>(root));
while (XS.hasNext()) {
T X = XS.next();
Set<T> DF_X = HashSetFactory.make();
DF.put(X, DF_X);
// DF_local
for (Iterator<? extends T> YS = G.getSuccNodes(X); YS.hasNext(); ) {
T Y = YS.next();
if (dom.getIdom(Y) != X) {
DF_X.add(Y);
}
}
// DF_up
for (Iterator<? extends T> ZS = DT.getSuccNodes(X); ZS.hasNext(); ) {
T Z = ZS.next();
for (Iterator<T> YS2 = getDominanceFrontier(Z); YS2.hasNext(); ) {
T Y2 = YS2.next();
if (dom.getIdom(Y2) != X) DF_X.add(Y2);
}
}
}
}
private static void removeNode(Graph<AbstractPDGNode> cfg, AbstractPDGNode node) {
Iterator<? extends AbstractPDGNode> itPred = cfg.getPredNodes(node);
while (itPred.hasNext()) {
AbstractPDGNode pred = itPred.next();
Iterator<? extends AbstractPDGNode> itSucc = cfg.getSuccNodes(node);
while (itSucc.hasNext()) {
AbstractPDGNode succ = itSucc.next();
cfg.addEdge(pred, succ);
}
}
cfg.removeNodeAndEdges(node);
}
/**
* Return a view of an {@link IClassHierarchy} as a {@link Graph}, with edges from classes to
* immediate subtypes
*/
public static Graph<IClass> typeHierarchy2Graph(IClassHierarchy cha) throws WalaException {
Graph<IClass> result = SlowSparseNumberedGraph.make();
for (IClass c : cha) {
result.addNode(c);
}
for (IClass c : cha) {
for (IClass x : cha.getImmediateSubclasses(c)) {
result.addEdge(c, x);
}
if (c.isInterface()) {
for (IClass x : cha.getImplementors(c.getReference())) {
result.addEdge(c, x);
}
}
}
return result;
}
public static Map<InstanceKey, String> runAnalysisHelper(CallGraph cg, PointerAnalysis pa)
throws CancelRuntimeException {
logger.debug("*******************************************************");
logger.debug("* Prefix Analysis: Constructing Prefix Transfer Graph *");
final Graph<InstanceKeySite> g = new UriPrefixTransferGraph(pa);
logger.debug("* The Graph: *");
logger.debug("*******************************************************");
Iterator<InstanceKeySite> iksI = g.iterator();
while (iksI.hasNext()) {
InstanceKeySite iks = iksI.next();
logger.debug("# " + iks);
Iterator<InstanceKeySite> edgesI = g.getSuccNodes(iks);
while (edgesI.hasNext()) {
logger.debug("? \t -->" + edgesI.next());
}
}
final PrefixTransferFunctionProvider tfp = new PrefixTransferFunctionProvider();
IKilldallFramework<InstanceKeySite, PrefixVariable> framework =
new IKilldallFramework<InstanceKeySite, PrefixVariable>() {
public Graph<InstanceKeySite> getFlowGraph() {
return g;
}
public ITransferFunctionProvider<InstanceKeySite, PrefixVariable>
getTransferFunctionProvider() {
return tfp;
}
};
DataflowSolver<InstanceKeySite, PrefixVariable> dfs =
new DataflowSolver<InstanceKeySite, PrefixVariable>(framework) {
@Override
protected PrefixVariable makeEdgeVariable(InstanceKeySite src, InstanceKeySite dst) {
return new PrefixVariable() {};
}
@Override
protected PrefixVariable makeNodeVariable(InstanceKeySite n, boolean IN) {
// TODO Auto-generated method stub
PrefixVariable var = new PrefixVariable() {};
// if (n instanceof StringBuilderToStringInstanceKeySite)
// var.setOrderNumber(0);
// else var.setOrderNumber(10);
// var.add(3);
return var;
}
@Override
protected PrefixVariable[] makeStmtRHS(int size) {
return new PrefixVariable[size];
}
};
logger.debug("\n**************************************************");
logger.debug("* Running Analysis");
try {
dfs.solve(new EmptyProgressMonitor());
} catch (CancelException e) {
throw new CancelRuntimeException(e);
}
Map<InstanceKey, String> prefixes = new HashMap<InstanceKey, String>();
iksI = g.iterator();
while (iksI.hasNext()) {
InstanceKeySite iks = iksI.next();
prefixes.put(
pa.getInstanceKeyMapping().getMappedObject(iks.instanceID()),
dfs.getOut(iks).knownPrefixes.get(iks.instanceID()));
// logger.debug(iks + " ~> " + dfs.getOut(iks));
}
// logger.debug("\nLocalPointerKeys that point to String constants: \n" + stringConstants);
for (Entry<InstanceKey, String> e : prefixes.entrySet()) {
logger.debug(pa.getInstanceKeyMapping().getMappedIndex(e.getKey()) + "\t~> " + e.getValue());
}
// TODO: populate prefixes
return prefixes;
}
/**
* Constructor DFSFinishTimeIterator.
*
* @param G
* @throws NullPointerException if G is null
*/
public BFSIterator(Graph<T> G) throws NullPointerException {
this(G, G == null ? null : G.iterator());
}
/**
* get the out edges of a given node
*
* @param n the node of which to get the out edges
* @return the out edges
*/
protected Iterator<? extends T> getConnected(T n) {
return G.getSuccNodes(n);
}