Examples with AssignEdge soot.jimple.spark.ondemand.pautil.AssignEdge used on opensource projects

Example 6 with AssignEdge

use of soot.jimple.spark.ondemand.pautil.AssignEdge in project soot by Sable.

the class DemandCSPointsTo method filterAssigns.

protected Collection<AssignEdge> filterAssigns(final VarNode v, final ImmutableStack<Integer> callingContext, boolean forward, boolean refineVirtCalls) {
    Set<AssignEdge> assigns = forward ? csInfo.getAssignEdges(v) : csInfo.getAssignBarEdges(v);
    Collection<AssignEdge> realAssigns;
    boolean exitNode = forward ? SootUtil.isParamNode(v) : SootUtil.isRetNode(v);
    final boolean backward = !forward;
    if (exitNode && !callingContext.isEmpty()) {
        Integer topCallSite = callingContext.peek();
        realAssigns = new ArrayList<AssignEdge>();
        for (AssignEdge assignEdge : assigns) {
            assert (forward && assignEdge.isParamEdge()) || (backward && assignEdge.isReturnEdge()) : assignEdge;
            Integer assignEdgeCallSite = assignEdge.getCallSite();
            assert csInfo.getCallSiteTargets(assignEdgeCallSite).contains(((LocalVarNode) v).getMethod()) : assignEdge;
            if (topCallSite.equals(assignEdgeCallSite) || callEdgeInSCC(assignEdge)) {
                realAssigns.add(assignEdge);
            }
        }
    // assert realAssigns.size() == 1;
    } else {
        if (assigns.size() > 1) {
            realAssigns = new ArrayList<AssignEdge>();
            for (AssignEdge assignEdge : assigns) {
                boolean enteringCall = forward ? assignEdge.isReturnEdge() : assignEdge.isParamEdge();
                if (enteringCall) {
                    Integer callSite = assignEdge.getCallSite();
                    if (csInfo.isVirtCall(callSite) && refineVirtCalls) {
                        Set<SootMethod> targets = refineCallSite(assignEdge.getCallSite(), callingContext);
                        LocalVarNode nodeInTargetMethod = forward ? (LocalVarNode) assignEdge.getSrc() : (LocalVarNode) assignEdge.getDst();
                        if (targets.contains(nodeInTargetMethod.getMethod())) {
                            realAssigns.add(assignEdge);
                        }
                    } else {
                        realAssigns.add(assignEdge);
                    }
                } else {
                    realAssigns.add(assignEdge);
                }
            }
        } else {
            realAssigns = assigns;
        }
    }
    return realAssigns;
}

Example 7 with AssignEdge

use of soot.jimple.spark.ondemand.pautil.AssignEdge in project soot by Sable.

the class DemandCSPointsTo method findVarContextsFromAlloc.

protected CallingContextSet findVarContextsFromAlloc(AllocAndContext allocAndContext, VarNode targetVar) {
    CallingContextSet tmpSet = checkAllocAndContextCache(allocAndContext, targetVar);
    if (tmpSet != null) {
        return tmpSet;
    }
    CallingContextSet ret = new CallingContextSet();
    allocAndContextCache.get(allocAndContext).put(targetVar, ret);
    try {
        HashSet<VarAndContext> marked = new HashSet<VarAndContext>();
        Stack<VarAndContext> worklist = new Stack<VarAndContext>();
        Propagator<VarAndContext> p = new Propagator<VarAndContext>(marked, worklist);
        AllocNode alloc = allocAndContext.alloc;
        ImmutableStack<Integer> allocContext = allocAndContext.context;
        Node[] newBarNodes = pag.allocLookup(alloc);
        for (int i = 0; i < newBarNodes.length; i++) {
            VarNode v = (VarNode) newBarNodes[i];
            p.prop(new VarAndContext(v, allocContext));
        }
        while (!worklist.isEmpty()) {
            incrementNodesTraversed();
            VarAndContext curVarAndContext = worklist.pop();
            if (DEBUG) {
                debugPrint("looking at " + curVarAndContext);
            }
            VarNode curVar = curVarAndContext.var;
            ImmutableStack<Integer> curContext = curVarAndContext.context;
            if (curVar == targetVar) {
                ret.add(curContext);
            }
            // assign
            Collection<AssignEdge> assignEdges = filterAssigns(curVar, curContext, false, true);
            for (AssignEdge assignEdge : assignEdges) {
                VarNode dst = assignEdge.getDst();
                ImmutableStack<Integer> newContext = curContext;
                if (assignEdge.isReturnEdge()) {
                    if (!curContext.isEmpty()) {
                        if (!callEdgeInSCC(assignEdge)) {
                            assert assignEdge.getCallSite().equals(curContext.peek()) : assignEdge + " " + curContext;
                            newContext = curContext.pop();
                        } else {
                            newContext = popRecursiveCallSites(curContext);
                        }
                    }
                } else if (assignEdge.isParamEdge()) {
                    if (DEBUG)
                        debugPrint("entering call site " + assignEdge.getCallSite());
                    // if (!isRecursive(curContext, assignEdge)) {
                    // newContext = curContext.push(assignEdge
                    // .getCallSite());
                    // }
                    newContext = pushWithRecursionCheck(curContext, assignEdge);
                }
                if (assignEdge.isReturnEdge() && curContext.isEmpty() && csInfo.isVirtCall(assignEdge.getCallSite())) {
                    Set<SootMethod> targets = refineCallSite(assignEdge.getCallSite(), newContext);
                    if (!targets.contains(((LocalVarNode) assignEdge.getDst()).getMethod())) {
                        continue;
                    }
                }
                if (dst instanceof GlobalVarNode) {
                    newContext = EMPTY_CALLSTACK;
                }
                p.prop(new VarAndContext(dst, newContext));
            }
            // putfield_bars
            Set<VarNode> matchTargets = vMatches.vMatchLookup(curVar);
            Node[] pfTargets = pag.storeLookup(curVar);
            for (int i = 0; i < pfTargets.length; i++) {
                FieldRefNode frNode = (FieldRefNode) pfTargets[i];
                final VarNode storeBase = frNode.getBase();
                SparkField field = frNode.getField();
                // FieldRefNode>(curVar, frNode);
                for (Pair<VarNode, VarNode> load : fieldToLoads.get(field)) {
                    final VarNode loadBase = load.getO2();
                    final PointsToSetInternal loadBaseP2Set = loadBase.getP2Set();
                    final PointsToSetInternal storeBaseP2Set = storeBase.getP2Set();
                    final VarNode matchTgt = load.getO1();
                    if (matchTargets.contains(matchTgt)) {
                        if (DEBUG) {
                            debugPrint("match source " + matchTgt);
                        }
                        PointsToSetInternal intersection = SootUtil.constructIntersection(storeBaseP2Set, loadBaseP2Set, pag);
                        boolean checkField = fieldCheckHeuristic.validateMatchesForField(field);
                        if (checkField) {
                            AllocAndContextSet sharedAllocContexts = findContextsForAllocs(new VarAndContext(storeBase, curContext), intersection);
                            for (AllocAndContext curAllocAndContext : sharedAllocContexts) {
                                CallingContextSet upContexts;
                                if (fieldCheckHeuristic.validFromBothEnds(field)) {
                                    upContexts = findUpContextsForVar(curAllocAndContext, new VarContextAndUp(loadBase, EMPTY_CALLSTACK, EMPTY_CALLSTACK));
                                } else {
                                    upContexts = findVarContextsFromAlloc(curAllocAndContext, loadBase);
                                }
                                for (ImmutableStack<Integer> upContext : upContexts) {
                                    p.prop(new VarAndContext(matchTgt, upContext));
                                }
                            }
                        } else {
                            p.prop(new VarAndContext(matchTgt, EMPTY_CALLSTACK));
                        }
                    // h.handleMatchSrc(matchSrc, intersection,
                    // storeBase,
                    // loadBase, varAndContext, checkGetfield);
                    // if (h.terminate())
                    // return;
                    }
                }
            }
        }
        return ret;
    } catch (CallSiteException e) {
        allocAndContextCache.remove(allocAndContext);
        throw e;
    }
}

Example 8 with AssignEdge

use of soot.jimple.spark.ondemand.pautil.AssignEdge in project soot by Sable.

the class DemandCSPointsTo method refineCallSite.

protected Set<SootMethod> refineCallSite(Integer callSite, ImmutableStack<Integer> origContext) {
    CallSiteAndContext callSiteAndContext = new CallSiteAndContext(callSite, origContext);
    if (queriedCallSites.contains(callSiteAndContext)) {
        // }
        return callSiteToResolvedTargets.get(callSiteAndContext);
    }
    if (callGraphStack.contains(callSiteAndContext)) {
        return Collections.<SootMethod>emptySet();
    } else {
        callGraphStack.push(callSiteAndContext);
    }
    final VarNode receiver = csInfo.getReceiverForVirtCallSite(callSite);
    final Type receiverType = receiver.getType();
    final SootMethod invokedMethod = csInfo.getInvokedMethod(callSite);
    final NumberedString methodSig = invokedMethod.getNumberedSubSignature();
    final Set<SootMethod> allTargets = csInfo.getCallSiteTargets(callSite);
    if (!refineCallGraph) {
        callGraphStack.pop();
        return allTargets;
    }
    if (DEBUG_VIRT) {
        debugPrint("refining call to " + invokedMethod + " on " + receiver + " " + origContext);
    }
    final HashSet<VarAndContext> marked = new HashSet<VarAndContext>();
    final Stack<VarAndContext> worklist = new Stack<VarAndContext>();
    final class Helper {

        void prop(VarAndContext varAndContext) {
            if (marked.add(varAndContext)) {
                worklist.push(varAndContext);
            }
        }
    }
    ;
    final Helper h = new Helper();
    h.prop(new VarAndContext(receiver, origContext));
    while (!worklist.isEmpty()) {
        incrementNodesTraversed();
        VarAndContext curVarAndContext = worklist.pop();
        if (DEBUG_VIRT) {
            debugPrint("virt looking at " + curVarAndContext);
        }
        VarNode curVar = curVarAndContext.var;
        ImmutableStack<Integer> curContext = curVarAndContext.context;
        // Set<SootMethod> curVarTargets = getCallTargets(curVar.getP2Set(),
        // methodSig, receiverType, allTargets);
        // if (curVarTargets.size() <= 1) {
        // for (SootMethod method : curVarTargets) {
        // callSiteToResolvedTargets.put(callSiteAndContext, method);
        // }
        // continue;
        // }
        Node[] newNodes = pag.allocInvLookup(curVar);
        for (int i = 0; i < newNodes.length; i++) {
            AllocNode allocNode = (AllocNode) newNodes[i];
            for (SootMethod method : getCallTargetsForType(allocNode.getType(), methodSig, receiverType, allTargets)) {
                callSiteToResolvedTargets.put(callSiteAndContext, method);
            }
        }
        Collection<AssignEdge> assigns = filterAssigns(curVar, curContext, true, true);
        for (AssignEdge assignEdge : assigns) {
            VarNode src = assignEdge.getSrc();
            ImmutableStack<Integer> newContext = curContext;
            if (assignEdge.isParamEdge()) {
                if (!curContext.isEmpty()) {
                    if (!callEdgeInSCC(assignEdge)) {
                        assert assignEdge.getCallSite().equals(curContext.peek());
                        newContext = curContext.pop();
                    } else {
                        newContext = popRecursiveCallSites(curContext);
                    }
                } else {
                    callSiteToResolvedTargets.putAll(callSiteAndContext, allTargets);
                    // }
                    continue;
                }
            } else if (assignEdge.isReturnEdge()) {
                // if (DEBUG)
                // logger.debug("entering call site "
                // + assignEdge.getCallSite());
                // if (!isRecursive(curContext, assignEdge)) {
                // newContext = curContext.push(assignEdge.getCallSite());
                // }
                newContext = pushWithRecursionCheck(curContext, assignEdge);
            } else if (src instanceof GlobalVarNode) {
                newContext = EMPTY_CALLSTACK;
            }
            h.prop(new VarAndContext(src, newContext));
        }
        // TODO respect heuristic
        Set<VarNode> matchSources = vMatches.vMatchInvLookup(curVar);
        final boolean oneMatch = matchSources.size() == 1;
        Node[] loads = pag.loadInvLookup(curVar);
        for (int i = 0; i < loads.length; i++) {
            FieldRefNode frNode = (FieldRefNode) loads[i];
            final VarNode loadBase = frNode.getBase();
            SparkField field = frNode.getField();
            for (Pair<VarNode, VarNode> store : fieldToStores.get(field)) {
                final VarNode storeBase = store.getO2();
                final PointsToSetInternal storeBaseP2Set = storeBase.getP2Set();
                final PointsToSetInternal loadBaseP2Set = loadBase.getP2Set();
                final VarNode matchSrc = store.getO1();
                if (matchSources.contains(matchSrc)) {
                    // optimize for common case of constructor init
                    boolean skipMatch = false;
                    if (oneMatch) {
                        PointsToSetInternal matchSrcPTo = matchSrc.getP2Set();
                        Set<SootMethod> matchSrcCallTargets = getCallTargets(matchSrcPTo, methodSig, receiverType, allTargets);
                        if (matchSrcCallTargets.size() <= 1) {
                            skipMatch = true;
                            for (SootMethod method : matchSrcCallTargets) {
                                callSiteToResolvedTargets.put(callSiteAndContext, method);
                            }
                        }
                    }
                    if (!skipMatch) {
                        final PointsToSetInternal intersection = SootUtil.constructIntersection(storeBaseP2Set, loadBaseP2Set, pag);
                        AllocAndContextSet allocContexts = null;
                        boolean oldRefining = refiningCallSite;
                        int oldNesting = nesting;
                        try {
                            refiningCallSite = true;
                            allocContexts = findContextsForAllocs(new VarAndContext(loadBase, curContext), intersection);
                        } catch (CallSiteException e) {
                            callSiteToResolvedTargets.putAll(callSiteAndContext, allTargets);
                            continue;
                        } finally {
                            refiningCallSite = oldRefining;
                            nesting = oldNesting;
                        }
                        for (AllocAndContext allocAndContext : allocContexts) {
                            CallingContextSet matchSrcContexts;
                            if (fieldCheckHeuristic.validFromBothEnds(field)) {
                                matchSrcContexts = findUpContextsForVar(allocAndContext, new VarContextAndUp(storeBase, EMPTY_CALLSTACK, EMPTY_CALLSTACK));
                            } else {
                                matchSrcContexts = findVarContextsFromAlloc(allocAndContext, storeBase);
                            }
                            for (ImmutableStack<Integer> matchSrcContext : matchSrcContexts) {
                                VarAndContext newVarAndContext = new VarAndContext(matchSrc, matchSrcContext);
                                h.prop(newVarAndContext);
                            }
                        }
                    }
                }
            }
        }
    }
    if (DEBUG_VIRT) {
        debugPrint("call of " + invokedMethod + " on " + receiver + " " + origContext + " goes to " + callSiteToResolvedTargets.get(callSiteAndContext));
    }
    callGraphStack.pop();
    queriedCallSites.add(callSiteAndContext);
    return callSiteToResolvedTargets.get(callSiteAndContext);
}