Ejemplo n.º 1
0
        public void RemoveUnavailableCalls(IndexDb index)
        {
            var mergedRefs = new HashSet <string>();
            var entryNodes = EntryNodes.Values.Where(x => x.OutNodes.Count > 0).ToList();

            foreach (var entryNode in entryNodes)
            {
                foreach (var ref1 in index.AssemblyReferences[entryNode.AssemblyName])
                {
                    mergedRefs.Add(ref1);
                }
            }

            var processingNodes = new Queue <ICallGraphNode>(entryNodes);

            while (processingNodes.Count > 0)
            {
                var node = processingNodes.Dequeue();
                if (node.OutNodes.Count == 0)
                {
                    continue;    // this is a sensitive sink
                }
                for (var i = node.OutNodes.Count - 1; i >= 0; i--)
                {
                    var outNode = node.OutNodes[i];
                    if (outNode.OutNodes.Count > 0) // outNode is not sensitive sink
                    {
                        if (node.AssemblyName != outNode.AssemblyName &&
                            !mergedRefs.Contains(outNode.AssemblyName))
                        {
                            node.OutNodes.RemoveAt(i);
                            outNode.InNodes.Remove(node);
                            if (outNode.InNodes.Count == 0)
                            {
                                // outNode is unavailable from entry points
                                RemoveUnavailableNodesFrom(outNode);
                            }
                        }
                        else
                        {
                            processingNodes.Enqueue(outNode);
                        }
                    }
                }

                // do it only for non-sensitive sinks
                if (node.OutNodes.Count == 0)
                {
                    RemoveUnavailableNodesTo(node);
                }
            }
        }
Ejemplo n.º 2
0
        public CallGraphBuilder(IndexDb index)
        {
            this.index = index;

            stat.IgnoredOpcodes = new HashSet <Code>();
        }