Examples with Propagator soot.jimple.spark.ondemand.genericutil.Propagator used on opensource projects

Example 1 with Propagator

use of soot.jimple.spark.ondemand.genericutil.Propagator in project soot by Sable.

the class DemandCSPointsTo method findContextsForAllocs.

protected AllocAndContextSet findContextsForAllocs(final VarAndContext varAndContext, PointsToSetInternal locs) {
    if (contextForAllocsStack.contains(varAndContext)) {
        // recursion; check depth
        // we're fine for x = x.next
        int oldIndex = contextForAllocsStack.indexOf(varAndContext);
        if (oldIndex != contextForAllocsStack.size() - 1) {
            if (recursionDepth == -1) {
                recursionDepth = oldIndex + 1;
                if (DEBUG) {
                    debugPrint("RECURSION depth = " + recursionDepth);
                }
            } else if (contextForAllocsStack.size() - oldIndex > 5) {
                // just give up
                throw new TerminateEarlyException();
            }
        }
    }
    contextForAllocsStack.push(varAndContext);
    final AllocAndContextSet ret = new AllocAndContextSet();
    final PointsToSetInternal realLocs = checkContextsForAllocsCache(varAndContext, ret, locs);
    if (realLocs.isEmpty()) {
        if (DEBUG) {
            debugPrint("cached result " + ret);
        }
        contextForAllocsStack.pop();
        return ret;
    }
    nesting++;
    if (DEBUG) {
        debugPrint("finding alloc contexts for " + varAndContext);
    }
    try {
        final Set<VarAndContext> marked = new HashSet<VarAndContext>();
        final Stack<VarAndContext> worklist = new Stack<VarAndContext>();
        final Propagator<VarAndContext> p = new Propagator<VarAndContext>(marked, worklist);
        p.prop(varAndContext);
        IncomingEdgeHandler edgeHandler = new IncomingEdgeHandler() {

            @Override
            public void handleAlloc(AllocNode allocNode, VarAndContext origVarAndContext) {
                if (realLocs.contains(allocNode)) {
                    if (DEBUG) {
                        debugPrint("found alloc " + allocNode);
                    }
                    ret.add(new AllocAndContext(allocNode, origVarAndContext.context));
                }
            }

            @Override
            public void handleMatchSrc(final VarNode matchSrc, PointsToSetInternal intersection, VarNode loadBase, VarNode storeBase, VarAndContext origVarAndContext, SparkField field, boolean refine) {
                if (DEBUG) {
                    debugPrint("handling src " + matchSrc);
                    debugPrint("intersection " + intersection);
                }
                if (!refine) {
                    p.prop(new VarAndContext(matchSrc, EMPTY_CALLSTACK));
                    return;
                }
                AllocAndContextSet allocContexts = findContextsForAllocs(new VarAndContext(loadBase, origVarAndContext.context), intersection);
                if (DEBUG) {
                    debugPrint("alloc contexts " + allocContexts);
                }
                for (AllocAndContext allocAndContext : allocContexts) {
                    if (DEBUG) {
                        debugPrint("alloc and context " + allocAndContext);
                    }
                    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) {
                        // ret
                        // .add(new Pair<AllocNode,
                        // ImmutableStack<Integer>>(
                        // (AllocNode) n,
                        // matchSrcContext));
                        // ret.addAll(findContextsForAllocs(matchSrc,
                        // matchSrcContext, locs));
                        p.prop(new VarAndContext(matchSrc, matchSrcContext));
                    }
                }
            }

            @Override
            Object getResult() {
                return ret;
            }

            @Override
            void handleAssignSrc(VarAndContext newVarAndContext, VarAndContext origVarAndContext, AssignEdge assignEdge) {
                p.prop(newVarAndContext);
            }

            @Override
            boolean shouldHandleSrc(VarNode src) {
                return realLocs.hasNonEmptyIntersection(src.getP2Set());
            }
        };
        processIncomingEdges(edgeHandler, worklist);
        // update the cache
        if (recursionDepth != -1) {
            // if we're beyond recursion, don't cache anything
            if (contextForAllocsStack.size() > recursionDepth) {
                if (DEBUG) {
                    debugPrint("REMOVING " + varAndContext);
                    debugPrint(contextForAllocsStack.toString());
                }
                contextsForAllocsCache.remove(varAndContext);
            } else {
                assert contextForAllocsStack.size() == recursionDepth : recursionDepth + " " + contextForAllocsStack;
                recursionDepth = -1;
                if (contextsForAllocsCache.containsKey(varAndContext)) {
                    contextsForAllocsCache.get(varAndContext).getO2().addAll(ret);
                } else {
                    PointsToSetInternal storedSet = new HybridPointsToSet(locs.getType(), pag);
                    storedSet.addAll(locs, null);
                    contextsForAllocsCache.put(varAndContext, new Pair<PointsToSetInternal, AllocAndContextSet>(storedSet, ret));
                }
            }
        } else {
            if (contextsForAllocsCache.containsKey(varAndContext)) {
                contextsForAllocsCache.get(varAndContext).getO2().addAll(ret);
            } else {
                PointsToSetInternal storedSet = new HybridPointsToSet(locs.getType(), pag);
                storedSet.addAll(locs, null);
                contextsForAllocsCache.put(varAndContext, new Pair<PointsToSetInternal, AllocAndContextSet>(storedSet, ret));
            }
        }
        nesting--;
        return ret;
    } catch (CallSiteException e) {
        contextsForAllocsCache.remove(varAndContext);
        throw e;
    } finally {
        contextForAllocsStack.pop();
    }
}

Example 2 with Propagator

use of soot.jimple.spark.ondemand.genericutil.Propagator in project soot by Sable.

the class DemandCSPointsTo method findUpContextsForVar.

protected CallingContextSet findUpContextsForVar(AllocAndContext allocAndContext, VarContextAndUp varContextAndUp) {
    final AllocNode alloc = allocAndContext.alloc;
    final ImmutableStack<Integer> allocContext = allocAndContext.context;
    CallingContextSet tmpSet = checkUpContextCache(varContextAndUp, allocAndContext);
    if (tmpSet != null) {
        return tmpSet;
    }
    final CallingContextSet ret = new CallingContextSet();
    upContextCache.get(varContextAndUp).put(allocAndContext, ret);
    nesting++;
    if (DEBUG) {
        debugPrint("finding up context for " + varContextAndUp + " to " + alloc + " " + allocContext);
    }
    try {
        final Set<VarAndContext> marked = new HashSet<VarAndContext>();
        final Stack<VarAndContext> worklist = new Stack<VarAndContext>();
        final Propagator<VarAndContext> p = new Propagator<VarAndContext>(marked, worklist);
        p.prop(varContextAndUp);
        class UpContextEdgeHandler extends IncomingEdgeHandler {

            @Override
            public void handleAlloc(AllocNode allocNode, VarAndContext origVarAndContext) {
                VarContextAndUp contextAndUp = (VarContextAndUp) origVarAndContext;
                if (allocNode == alloc) {
                    if (allocContext.topMatches(contextAndUp.context)) {
                        ImmutableStack<Integer> reverse = contextAndUp.upContext.reverse();
                        ImmutableStack<Integer> toAdd = allocContext.popAll(contextAndUp.context).pushAll(reverse);
                        if (DEBUG) {
                            debugPrint("found up context " + toAdd);
                        }
                        ret.add(toAdd);
                    } else if (contextAndUp.context.topMatches(allocContext)) {
                        ImmutableStack<Integer> toAdd = contextAndUp.upContext.reverse();
                        if (DEBUG) {
                            debugPrint("found up context " + toAdd);
                        }
                        ret.add(toAdd);
                    }
                }
            }

            @Override
            public void handleMatchSrc(VarNode matchSrc, PointsToSetInternal intersection, VarNode loadBase, VarNode storeBase, VarAndContext origVarAndContext, SparkField field, boolean refine) {
                VarContextAndUp contextAndUp = (VarContextAndUp) origVarAndContext;
                if (DEBUG) {
                    debugPrint("CHECKING " + alloc);
                }
                PointsToSetInternal tmp = new HybridPointsToSet(alloc.getType(), pag);
                tmp.add(alloc);
                AllocAndContextSet allocContexts = findContextsForAllocs(new VarAndContext(matchSrc, EMPTY_CALLSTACK), tmp);
                // Set allocContexts = Collections.singleton(new Object());
                if (!refine) {
                    if (!allocContexts.isEmpty()) {
                        ret.add(contextAndUp.upContext.reverse());
                    }
                } else {
                    if (!allocContexts.isEmpty()) {
                        for (AllocAndContext t : allocContexts) {
                            ImmutableStack<Integer> discoveredAllocContext = t.context;
                            if (!allocContext.topMatches(discoveredAllocContext)) {
                                continue;
                            }
                            ImmutableStack<Integer> trueAllocContext = allocContext.popAll(discoveredAllocContext);
                            AllocAndContextSet allocAndContexts = findContextsForAllocs(new VarAndContext(storeBase, trueAllocContext), intersection);
                            for (AllocAndContext allocAndContext : allocAndContexts) {
                                // CallingContextSet upContexts;
                                if (fieldCheckHeuristic.validFromBothEnds(field)) {
                                    ret.addAll(findUpContextsForVar(allocAndContext, new VarContextAndUp(loadBase, contextAndUp.context, contextAndUp.upContext)));
                                } else {
                                    CallingContextSet tmpContexts = findVarContextsFromAlloc(allocAndContext, loadBase);
                                    // upContexts = new CallingContextSet();
                                    for (ImmutableStack<Integer> tmpContext : tmpContexts) {
                                        if (tmpContext.topMatches(contextAndUp.context)) {
                                            ImmutableStack<Integer> reverse = contextAndUp.upContext.reverse();
                                            ImmutableStack<Integer> toAdd = tmpContext.popAll(contextAndUp.context).pushAll(reverse);
                                            ret.add(toAdd);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }

            @Override
            Object getResult() {
                return ret;
            }

            @Override
            void handleAssignSrc(VarAndContext newVarAndContext, VarAndContext origVarAndContext, AssignEdge assignEdge) {
                VarContextAndUp contextAndUp = (VarContextAndUp) origVarAndContext;
                ImmutableStack<Integer> upContext = contextAndUp.upContext;
                ImmutableStack<Integer> newUpContext = upContext;
                if (assignEdge.isParamEdge() && contextAndUp.context.isEmpty()) {
                    if (upContext.size() < ImmutableStack.getMaxSize()) {
                        newUpContext = pushWithRecursionCheck(upContext, assignEdge);
                    }
                    ;
                }
                p.prop(new VarContextAndUp(newVarAndContext.var, newVarAndContext.context, newUpContext));
            }

            @Override
            boolean shouldHandleSrc(VarNode src) {
                if (src instanceof GlobalVarNode) {
                    // // for now, just give up
                    throw new TerminateEarlyException();
                }
                return src.getP2Set().contains(alloc);
            }
        }
        ;
        UpContextEdgeHandler edgeHandler = new UpContextEdgeHandler();
        processIncomingEdges(edgeHandler, worklist);
        nesting--;
        // }
        return ret;
    } catch (CallSiteException e) {
        upContextCache.remove(varContextAndUp);
        throw e;
    }
}

Example 3 with Propagator

use of soot.jimple.spark.ondemand.genericutil.Propagator in project soot by Sable.

the class DemandCSPointsTo method nodesPropagatedThrough.

@SuppressWarnings("unused")
protected Set<VarNode> nodesPropagatedThrough(final VarNode source, final PointsToSetInternal allocs) {
    final Set<VarNode> marked = new HashSet<VarNode>();
    final Stack<VarNode> worklist = new Stack<VarNode>();
    Propagator<VarNode> p = new Propagator<VarNode>(marked, worklist);
    p.prop(source);
    while (!worklist.isEmpty()) {
        VarNode curNode = worklist.pop();
        Node[] assignSources = pag.simpleInvLookup(curNode);
        for (int i = 0; i < assignSources.length; i++) {
            VarNode assignSrc = (VarNode) assignSources[i];
            if (assignSrc.getP2Set().hasNonEmptyIntersection(allocs)) {
                p.prop(assignSrc);
            }
        }
        Set<VarNode> matchSources = vMatches.vMatchInvLookup(curNode);
        for (VarNode matchSrc : matchSources) {
            if (matchSrc.getP2Set().hasNonEmptyIntersection(allocs)) {
                p.prop(matchSrc);
            }
        }
    }
    return marked;
}

Example 4 with Propagator

use of soot.jimple.spark.ondemand.genericutil.Propagator in project soot by Sable.

the class DemandCSPointsTo method getFlowsToHelper.

protected Set<VarNode> getFlowsToHelper(AllocAndContext allocAndContext) {
    Set<VarNode> ret = new ArraySet<VarNode>();
    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];
            ret.add(v);
            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;
            ret.add(curVar);
            // 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 5 with Propagator

use of soot.jimple.spark.ondemand.genericutil.Propagator 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;
    }
}