Method addDirectJoinEdge

svf/lib/Graphs/ThreadCallGraph.cpp:202–225

! * Add direct fork edges * As join edge is a special return which is back to join site(s) rather than its fork site * A ThreadJoinEdge is created from the functions where join sites reside in to the start routine function * But we don't invoke addEdge() method to add the edge to src and dst, otherwise it makes a scc cycle */

 * But we don't invoke addEdge() method to add the edge to src and dst, otherwise it makes a scc cycle
 */
void ThreadCallGraph::addDirectJoinEdge(const CallICFGNode* cs,const CallSiteSet& forkset)
{

    CallGraphNode* joinFunNode = getCallGraphNode(cs->getCaller());

    for (CallSiteSet::const_iterator it = forkset.begin(), eit = forkset.end(); it != eit; ++it)
    {

        const FunObjVar* threadRoutineFun =
            SVFUtil::dyn_cast<FunValVar>(tdAPI->getForkedFun(*it))->getFunction();
        assert(threadRoutineFun && "thread routine function does not exist");
        CallGraphNode* threadRoutineFunNode = getCallGraphNode(threadRoutineFun);
        CallSiteID csId = addCallSite(cs, threadRoutineFun);

        if (!hasThreadJoinEdge(cs,joinFunNode,threadRoutineFunNode, csId))
        {
            assert(cs->getCaller() == joinFunNode->getFunction() && "callee instruction not inside caller??");
            ThreadJoinEdge* edge = new ThreadJoinEdge(joinFunNode,threadRoutineFunNode,csId);
            edge->addDirectCallSite(cs);

            addThreadJoinEdgeSetMap(cs, edge);
        }
    }
}