Esempio n. 1
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  protected void testStartToThread() {
    System.out.println("=====test startToThread ");
    Set maps = startToThread.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      JPegStmt key = (JPegStmt) entry.getKey();
      Tag tag = (Tag) key.getTags().get(0);
      System.out.println("---key=  " + tag + " " + key);
      /*	    List list = (List)entry.getValue();
      if (list.size()>0){

      System.out.println("**thread set:");
      Iterator it = list.iterator();
      while (it.hasNext()){
      Chain chain =(Chain)it.next();
      Iterator chainIt = chain.iterator();

      System.out.println("the size of chain is: "+chain.size());
      while (chainIt.hasNext()){
      JPegStmt stmt = (JPegStmt)chainIt.next();
      System.out.println(stmt);
      }
      }
      }
      */
    }
    System.out.println("=========startToThread--ends--------");
  }
Esempio n. 2
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 @Override
 protected final Collection<Unit> getUnits() {
   Set<Unit> result = new HashSet<>();
   result.addAll(this.forwardEdges.keySet());
   this.forwardEdges.values().forEach(result::addAll);
   return result;
 }
  public StronglyConnectedComponentsBV(BitVector typeVariableList, TypeResolverBV resolver)
      throws TypeException {
    this.resolver = resolver;
    variables = typeVariableList;

    black = new TreeSet();
    finished = new LinkedList();

    for (BitSetIterator i = variables.iterator(); i.hasNext(); ) {
      TypeVariableBV var = resolver.typeVariableForId(i.next());

      if (!black.contains(var)) {
        black.add(var);
        dfsg_visit(var);
      }
    }

    black = new TreeSet();

    for (Iterator i = finished.iterator(); i.hasNext(); ) {
      TypeVariableBV var = (TypeVariableBV) i.next();

      if (!black.contains(var)) {
        current_tree = new LinkedList();
        forest.add(current_tree);
        black.add(var);
        dfsgt_visit(var);
      }
    }

    for (Iterator i = forest.iterator(); i.hasNext(); ) {
      LinkedList list = (LinkedList) i.next();
      TypeVariableBV previous = null;
      StringBuffer s = null;
      if (DEBUG) {
        s = new StringBuffer("scc:\n");
      }

      for (Iterator j = list.iterator(); j.hasNext(); ) {
        TypeVariableBV current = (TypeVariableBV) j.next();

        if (DEBUG) {
          s.append(" " + current + "\n");
        }

        if (previous == null) {
          previous = current;
        } else {
          try {
            previous = previous.union(current);
          } catch (TypeException e) {
            if (DEBUG) {
              G.v().out.println(s);
            }
            throw e;
          }
        }
      }
    }
  }
Esempio n. 4
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    /**
     * Returns a <code>ThrowableSet</code> representing the set of exceptions included in <code>
     * include</code> minus the set of exceptions included in <code>exclude</code>. Creates a new
     * <code>ThrowableSet</code> only if there was not already one whose contents correspond to
     * <code>include</code> - <code>exclude</code>.
     *
     * @param include A set of {@link RefLikeType} objects representing exception types included in
     *     the result; may be <code>null</code> if there are no included types.
     * @param exclude A set of {@link AnySubType} objects representing exception types excluded from
     *     the result; may be <code>null</code> if there are no excluded types.
     * @return a <code>ThrowableSet</code> representing the set of exceptions corresponding to
     *     <code>include</code> - <code>exclude</code>.
     */
    private ThrowableSet registerSetIfNew(Set include, Set exclude) {
      if (INSTRUMENTING) {
        registrationCalls++;
      }
      if (include == null) {
        include = Collections.EMPTY_SET;
      }
      if (exclude == null) {
        exclude = Collections.EMPTY_SET;
      }
      int size = include.size() + exclude.size();
      Integer sizeKey = new Integer(size);

      List sizeList = (List) sizeToSets.get(sizeKey);
      if (sizeList == null) {
        sizeList = new LinkedList();
        sizeToSets.put(sizeKey, sizeList);
      }
      for (Iterator i = sizeList.iterator(); i.hasNext(); ) {
        ThrowableSet set = (ThrowableSet) i.next();
        if (set.exceptionsIncluded.equals(include) && set.exceptionsExcluded.equals(exclude)) {
          return set;
        }
      }
      if (INSTRUMENTING) {
        registeredSets++;
      }
      ThrowableSet result = new ThrowableSet(include, exclude);
      sizeList.add(result);
      return result;
    }
Esempio n. 5
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  public void computeSynchNodes() {
    int num = 0;
    Set maps = monitor.entrySet();

    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      FlowSet fs = (FlowSet) entry.getValue();
      num += fs.size();
    }
    System.err.println("synch objects: " + num);
  }
Esempio n. 6
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 protected void testUnitToPeg(HashMap unitToPeg) {
   System.out.println("=====test unitToPeg ");
   Set maps = unitToPeg.entrySet();
   for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
     Map.Entry entry = (Map.Entry) iter.next();
     System.out.println("---key=  " + entry.getKey());
     JPegStmt s = (JPegStmt) entry.getValue();
     System.out.println("--value= " + s);
   }
   System.out.println("=========unitToPeg--ends--------");
 }
Esempio n. 7
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 /**
  * Converts field annotations from Dexlib to Jimple
  *
  * @param h
  * @param f
  */
 void handleFieldAnnotation(Host h, Field f) {
   Set<? extends Annotation> aSet = f.getAnnotations();
   if (aSet != null && !aSet.isEmpty()) {
     List<Tag> tags = handleAnnotation(aSet, null);
     if (tags != null)
       for (Tag t : tags)
         if (t != null) {
           h.addTag(t);
           Debug.printDbg("add field annotation: ", t);
         }
   }
 }
Esempio n. 8
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  protected void testJoinStmtToThread() {
    System.out.println("=====test JoinStmtToThread");
    Set maps = threadNameToStart.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      Object key = entry.getKey();

      System.out.println("---key=  " + key);

      System.out.println("value: " + entry.getValue());
    }
    System.out.println("=========JoinStmtToThread--ends--------");
  }
Esempio n. 9
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  public void computeMonitorObjs() {
    Set maps = monitor.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();

      FlowSet fs = (FlowSet) entry.getValue();
      Iterator it = fs.iterator();
      while (it.hasNext()) {
        Object obj = it.next();
        if (!monitorObjs.contains(obj)) monitorObjs.add(obj);
      }
    }
  }
Esempio n. 10
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  private void createWorkList(LinkedList<Object> changedUnits, HashSet<Object> changedUnitsSet) {
    createWorkList(changedUnits, changedUnitsSet, g.getMainPegChain());

    Set maps = g.getStartToThread().entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      List runMethodChainList = (List) entry.getValue();
      Iterator it = runMethodChainList.iterator();
      while (it.hasNext()) {
        PegChain chain = (PegChain) it.next();
        createWorkList(changedUnits, changedUnitsSet, chain);
      }
    }
  }
Esempio n. 11
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  protected void testThreadNameToStart() {
    System.out.println("=====test ThreadNameToStart");
    Set maps = threadNameToStart.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      Object key = entry.getKey();

      System.out.println("---key=  " + key);
      JPegStmt stmt = (JPegStmt) entry.getValue();
      Tag tag1 = (Tag) stmt.getTags().get(0);
      System.out.println("value: " + tag1 + " " + stmt);
    }
    System.out.println("=========ThreadNameToStart--ends--------");
  }
Esempio n. 12
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  private void createWorkList(
      LinkedList<Object> changedUnits, HashSet<Object> changedUnitsSet, PegChain chain) {
    // Depth first scan
    Iterator it = chain.getHeads().iterator();
    Set<Object> gray = new HashSet<Object>();

    while (it.hasNext()) {
      Object head = it.next();
      if (!gray.contains(head)) {

        visitNode(gray, head, changedUnits, changedUnitsSet);
      }
    }
  }
Esempio n. 13
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 protected void buildPreds() {
   buildPredecessor(mainPegChain);
   Set maps = getStartToThread().entrySet();
   for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
     Map.Entry entry = (Map.Entry) iter.next();
     List runMethodChainList = (List) entry.getValue();
     Iterator it = runMethodChainList.iterator();
     while (it.hasNext()) {
       Chain chain = (Chain) it.next();
       //	System.out.println("chain is null: "+(chain == null));
       buildPredecessor(chain);
     }
   }
 }
  private void dfsgt_visit(TypeVariableBV var) {
    current_tree.add(var);

    BitVector children = var.children();

    for (BitSetIterator i = children.iterator(); i.hasNext(); ) {
      TypeVariableBV child = resolver.typeVariableForId(i.next());

      if (!black.contains(child)) {
        black.add(child);
        dfsgt_visit(child);
      }
    }
  }
  private void dfsg_visit(TypeVariableBV var) {
    BitVector parents = var.parents();

    for (BitSetIterator i = parents.iterator(); i.hasNext(); ) {
      TypeVariableBV parent = resolver.typeVariableForId(i.next());

      if (!black.contains(parent)) {
        black.add(parent);
        dfsg_visit(parent);
      }
    }

    finished.add(0, var);
  }
Esempio n. 16
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 protected void buildMaps(PegGraph pg) {
   exceHandlers.addAll(pg.getExceHandlers());
   startToThread.putAll(pg.getStartToThread());
   startToAllocNodes.putAll(pg.getStartToAllocNodes());
   startToBeginNodes.putAll(pg.getStartToBeginNodes());
   waitingNodes.putAll(pg.getWaitingNodes());
   notifyAll.putAll(pg.getNotifyAll());
   canNotBeCompacted.addAll(pg.getCanNotBeCompacted());
   synch.addAll(pg.getSynch());
   threadNameToStart.putAll(pg.getThreadNameToStart());
   specialJoin.addAll(pg.getSpecialJoin());
   joinStmtToThread.putAll(pg.getJoinStmtToThread());
   threadAllocSites.addAll(pg.getThreadAllocSites());
   allocNodeToThread.putAll(pg.getAllocNodeToThread());
 }
Esempio n. 17
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 /** Returns a string representation of this <code>ThrowableSet</code>. */
 public String toString() {
   StringBuffer buffer = new StringBuffer(this.toBriefString());
   buffer.append(":\n  ");
   for (Iterator i = exceptionsIncluded.iterator(); i.hasNext(); ) {
     buffer.append('+');
     Object o = i.next();
     buffer.append(o == null ? "null" : o.toString());
     // buffer.append(i.next().toString());
   }
   for (Iterator i = exceptionsExcluded.iterator(); i.hasNext(); ) {
     buffer.append('-');
     buffer.append(i.next().toString());
   }
   return buffer.toString();
 }
Esempio n. 18
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 /**
  * Utility method for building sets of exceptional types for a {@link Pair}.
  *
  * @param e The exceptional type to add to the set.
  * @param set The <code>Set</code> to which to add the types, or <code>null</code> if no <code>Set
  *     </code> has yet been allocated.
  * @return A <code>Set</code> containing the elements in <code>set</code> plus <code>e</code>.
  */
 private Set addExceptionToSet(RefLikeType e, Set set) {
   if (set == null) {
     set = new HashSet();
   }
   set.add(e);
   return set;
 }
Esempio n. 19
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 protected void testSet(Set set, String name) {
   System.out.println("$test set " + name);
   Iterator setIt = set.iterator();
   while (setIt.hasNext()) {
     Object s = setIt.next();
     // JPegStmt s = (JPegStmt)setIt.next();
     // Tag tag = (Tag)s.getTags().get(0);
     System.out.println(s);
   }
 }
Esempio n. 20
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  public void testWaitingNodes() {
    System.out.println("------waiting---begin");
    Set maps = waitingNodes.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      System.out.println("---key=  " + entry.getKey());
      FlowSet fs = (FlowSet) entry.getValue();
      if (fs.size() > 0) {

        System.out.println("**waiting nodes set:");
        Iterator it = fs.iterator();
        while (it.hasNext()) {
          JPegStmt unit = (JPegStmt) it.next();

          System.out.println(unit.toString());
        }
      }
    }
    System.out.println("------------waitingnodes---ends--------");
  }
Esempio n. 21
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 protected void testSynch() {
   Iterator<List> it = synch.iterator();
   System.out.println("========test synch======");
   while (it.hasNext()) {
     // JPegStmt s = (JPegStmt)it.next();
     // Tag tag = (Tag)s.getTags().get(0);
     // System.out.println(tag+" "+s);
     System.out.println(it.next());
   }
   System.out.println("========end test synch======");
 }
Esempio n. 22
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  public void testMonitor() {
    System.out.println("=====test monitor size: " + monitor.size());
    Set maps = monitor.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      String key = (String) entry.getKey();

      System.out.println("---key=  " + key);
      FlowSet list = (FlowSet) entry.getValue();
      if (list.size() > 0) {

        System.out.println("**set:  " + list.size());
        Iterator it = list.iterator();
        while (it.hasNext()) {
          JPegStmt stmt = (JPegStmt) it.next();
          Tag tag1 = (Tag) stmt.getTags().get(0);
          System.out.println(tag1 + " " + stmt);
        }
      }
    }
    System.out.println("=========monitor--ends--------");
  }
Esempio n. 23
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  protected void testUnitToSucc() {
    System.out.println("=====test unitToSucc ");
    Set maps = unitToSuccs.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      JPegStmt key = (JPegStmt) entry.getKey();
      Tag tag = (Tag) key.getTags().get(0);
      System.out.println("---key=  " + tag + " " + key);
      List list = (List) entry.getValue();
      if (list.size() > 0) {

        System.out.println("**succ set: size: " + list.size());
        Iterator it = list.iterator();
        while (it.hasNext()) {
          JPegStmt stmt = (JPegStmt) it.next();
          Tag tag1 = (Tag) stmt.getTags().get(0);
          System.out.println(tag1 + " " + stmt);
        }
      }
    }
    System.out.println("=========unitToSucc--ends--------");
  }
Esempio n. 24
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  /**
   * Create a method conveniently. The method is added to the class "TestClass". Parameters can be
   * given as an (positional) array of local variables (the "identity statements", required by Soot
   * to map parameters to local variables, are inserted automatically)
   */
  public SootMethod makeMethod(
      int modifier, String name, List<Local> params, soot.Type retType, List<Unit> bodyStmts) {
    SootMethod m =
        new SootMethod(
            name, params.stream().map(Local::getType).collect(toList()), retType, modifier);
    this.testClass.addMethod(m);
    Body body = Jimple.v().newBody(m);
    m.setActiveBody(body);

    // set the statements for the body.. first the identity statements, then the bodyStmts
    if (!m.isStatic()) {
      body.getLocals().add(localThis);
      body.getUnits()
          .add(Jimple.v().newIdentityStmt(localThis, Jimple.v().newThisRef(testClass.getType())));
    }
    IntStream.range(0, params.size())
        .forEach(
            pos -> {
              Local l = params.get(pos);
              ParameterRef pr = Jimple.v().newParameterRef(l.getType(), pos);
              body.getUnits().add(Jimple.v().newIdentityStmt(l, pr));
            });
    body.getUnits().addAll(bodyStmts);

    // set the locals for the body
    Set<Local> locals =
        Stream.concat(
                params.stream(),
                body.getUseAndDefBoxes()
                    .stream()
                    .filter(b -> b.getValue() instanceof Local)
                    .map(b -> (Local) b.getValue()))
            .collect(toSet());
    locals.removeAll(body.getLocals());
    body.getLocals().addAll(locals);

    return m;
  }
Esempio n. 25
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  private void visitNode(
      Set<Object> gray,
      Object obj,
      LinkedList<Object> changedUnits,
      HashSet<Object> changedUnitsSet) {

    gray.add(obj);
    changedUnits.addLast(obj);
    changedUnitsSet.add(obj);
    nodes.add(obj);
    valueBefore.add(newInitialFlow());
    valueAfter.add(newInitialFlow());
    Iterator succsIt = graph.getSuccsOf(obj).iterator();
    if (g.getSuccsOf(obj).size() > 0) {
      while (succsIt.hasNext()) {
        Object succ = succsIt.next();
        if (!gray.contains(succ)) {

          visitNode(gray, succ, changedUnits, changedUnitsSet);
        }
      }
    }
  }
Esempio n. 26
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  /**
   * Indicates whether this ThrowableSet includes some exception that might be caught by a handler
   * argument of the type <code>catcher</code>.
   *
   * @param catcher type of the handler parameter to be tested.
   * @return <code>true</code> if this set contains an exception type that might be caught by <code>
   *     catcher</code>, false if it does not.
   */
  public boolean catchableAs(RefType catcher) {
    if (INSTRUMENTING) {
      Manager.v().catchableAsQueries++;
    }

    FastHierarchy h = Scene.v().getOrMakeFastHierarchy();

    if (exceptionsExcluded.size() > 0) {
      if (INSTRUMENTING) {
        Manager.v().catchableAsFromSearch++;
      }
      for (Iterator i = exceptionsExcluded.iterator(); i.hasNext(); ) {
        AnySubType exclusion = (AnySubType) i.next();
        if (h.canStoreType(catcher, exclusion.getBase())) {
          return false;
        }
      }
    }

    if (exceptionsIncluded.contains(catcher)) {
      if (INSTRUMENTING) {
        if (exceptionsExcluded.size() == 0) {
          Manager.v().catchableAsFromMap++;
        } else {
          Manager.v().catchableAsFromSearch++;
        }
      }
      return true;
    } else {
      if (INSTRUMENTING) {
        if (exceptionsExcluded.size() == 0) {
          Manager.v().catchableAsFromSearch++;
        }
      }
      for (Iterator i = exceptionsIncluded.iterator(); i.hasNext(); ) {
        RefLikeType thrownType = (RefLikeType) i.next();
        if (thrownType instanceof RefType) {
          if (thrownType == catcher) {
            // assertion failure.
            throw new IllegalStateException(
                "ThrowableSet.catchableAs(RefType): exceptions.contains() failed to match contained RefType "
                    + catcher);
          } else if (h.canStoreType(thrownType, catcher)) {
            return true;
          }
        } else {
          RefType thrownBase = ((AnySubType) thrownType).getBase();
          // At runtime, thrownType might be instantiated by any
          // of thrownBase's subtypes, so:
          if (h.canStoreType(thrownBase, catcher) || h.canStoreType(catcher, thrownBase)) {
            return true;
          }
        }
      }
      return false;
    }
  }
Esempio n. 27
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  public void testMonitor() {
    System.out.println("=====test monitor size: " + monitor.size());
    Set maps = monitor.entrySet();
    for (Iterator iter = maps.iterator(); iter.hasNext(); ) {
      Map.Entry entry = (Map.Entry) iter.next();
      String key = (String) entry.getKey();

      System.out.println("---key=  " + key);
      FlowSet list = (FlowSet) entry.getValue();
      if (list.size() > 0) {

        System.out.println("**set:  " + list.size());
        Iterator it = list.iterator();
        while (it.hasNext()) {
          Object obj = it.next();
          if (obj instanceof JPegStmt) {
            JPegStmt stmt = (JPegStmt) obj;
            Tag tag1 = (Tag) stmt.getTags().get(0);
            System.out.println(tag1 + " " + stmt);
          } else {
            System.out.println("---list---");
            Iterator listIt = ((List) obj).iterator();
            while (listIt.hasNext()) {
              Object oo = listIt.next();
              if (oo instanceof JPegStmt) {
                JPegStmt unit = (JPegStmt) oo;
                Tag tag = (Tag) unit.getTags().get(0);
                System.out.println(tag + " " + unit);
              } else System.out.println(oo);
            }
            System.out.println("---list--end-");
          }
        }
      }
    }
    System.out.println("=========monitor--ends--------");
  }
Esempio n. 28
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  /**
   * Utility method which prints the abbreviations of the elements in a passed {@link Set} of
   * exception types.
   *
   * @param s The exceptions to print.
   * @param connector The character to insert between exceptions.
   * @return An abbreviated representation of the exceptions.
   */
  private String toAbbreviatedString(Set s, char connector) {
    final String JAVA_LANG = "java.lang.";
    final int JAVA_LANG_LENGTH = JAVA_LANG.length();
    final String EXCEPTION = "Exception";
    final int EXCEPTION_LENGTH = EXCEPTION.length();

    Collection vmErrorThrowables = ThrowableSet.Manager.v().VM_ERRORS.exceptionsIncluded;
    boolean containsAllVmErrors = s.containsAll(vmErrorThrowables);
    StringBuffer buf = new StringBuffer();

    if (containsAllVmErrors) {
      buf.append(connector);
      buf.append("vmErrors");
    }

    for (Iterator it = sortedThrowableIterator(s); it.hasNext(); ) {
      RefLikeType reflikeType = (RefLikeType) it.next();
      RefType baseType = null;
      if (reflikeType instanceof RefType) {
        baseType = (RefType) reflikeType;
        if (vmErrorThrowables.contains(baseType) && containsAllVmErrors) {
          continue; // Already accounted for vmErrors.
        } else {
          buf.append(connector);
        }
      } else if (reflikeType instanceof AnySubType) {
        buf.append(connector);
        buf.append('(');
        baseType = ((AnySubType) reflikeType).getBase();
      }
      String typeName = baseType.toString();
      if (typeName.startsWith(JAVA_LANG)) {
        typeName = typeName.substring(JAVA_LANG_LENGTH);
      }
      if (typeName.length() > EXCEPTION_LENGTH && typeName.endsWith(EXCEPTION)) {
        typeName = typeName.substring(0, typeName.length() - EXCEPTION_LENGTH);
      }
      buf.append(typeName);
      if (reflikeType instanceof AnySubType) {
        buf.append(')');
      }
    }
    return buf.toString();
  }
Esempio n. 29
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 /**
  * Returns a <code>ThrowableSet</code> which contains all the exceptions in <code>s</code> in
  * addition to those in this <code>ThrowableSet</code>.
  *
  * @param s set of exceptions to add to this set.
  * @return the union of this set with <code>s</code>
  * @throws ThrowableSet.AlreadyHasExclusionsException if this <code>ThrowableSet</code> or <code>s
  *     </code> is the result of a {@link #whichCatchableAs(RefType)} operation, so that it is not
  *     possible to represent the addition of <code>s</code> to this <code>ThrowableSet</code>.
  */
 public ThrowableSet add(ThrowableSet s) throws ThrowableSet.AlreadyHasExclusionsException {
   if (INSTRUMENTING) {
     Manager.v().addsOfSet++;
   }
   if (exceptionsExcluded.size() > 0 || s.exceptionsExcluded.size() > 0) {
     throw new AlreadyHasExclusionsException(
         "ThrowableSet.Add(ThrowableSet): attempt to add to ["
             + this.toString()
             + "] after removals recorded.");
   }
   ThrowableSet result = getMemoizedAdds(s);
   if (result == null) {
     if (INSTRUMENTING) {
       Manager.v().addsInclusionFromSearch++;
       Manager.v().addsExclusionWithoutSearch++;
     }
     result = this.add(s.exceptionsIncluded);
     memoizedAdds.put(s, result);
   } else if (INSTRUMENTING) {
     Manager.v().addsInclusionFromMemo++;
     Manager.v().addsExclusionWithoutSearch++;
   }
   return result;
 }
Esempio n. 30
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  /**
   * Partitions the exceptions in this <code>ThrowableSet</code> into those which would be caught by
   * a handler with the passed <code>catch</code> parameter type and those which would not.
   *
   * @param catcher type of the handler parameter to be tested.
   * @return a pair of <code>ThrowableSet</code>s, one containing the types in this <code>
   *     ThrowableSet</code> which would be be caught as <code>catcher</code> and the other
   *     containing the types in this <code>ThrowableSet</code> which would not be caught as <code>
   *     catcher</code>.
   */
  public Pair whichCatchableAs(RefType catcher) {
    if (INSTRUMENTING) {
      Manager.v().removesOfAnySubType++;
    }

    FastHierarchy h = Scene.v().getOrMakeFastHierarchy();
    Set caughtIncluded = null;
    Set caughtExcluded = null;
    Set uncaughtIncluded = null;
    Set uncaughtExcluded = null;

    if (INSTRUMENTING) {
      Manager.v().removesFromSearch++;
    }

    for (Iterator i = exceptionsExcluded.iterator(); i.hasNext(); ) {
      AnySubType exclusion = (AnySubType) i.next();
      RefType exclusionBase = exclusion.getBase();
      if (h.canStoreType(catcher, exclusionBase)) {
        // Because the add() operations ban additions to sets
        // with exclusions, we can be sure no types in this are
        // caught by catcher.
        return new Pair(ThrowableSet.Manager.v().EMPTY, this);
      } else if (h.canStoreType(exclusionBase, catcher)) {
        // exclusion wouldn't be in exceptionsExcluded if one
        // of its supertypes were not in exceptionsIncluded,
        // so we know the next loop will add either that supertype
        // or catcher to caughtIncluded.  Thus:
        caughtExcluded = addExceptionToSet(exclusion, caughtExcluded);
      } else {
        uncaughtExcluded = addExceptionToSet(exclusion, uncaughtExcluded);
      }
    }

    for (Iterator i = exceptionsIncluded.iterator(); i.hasNext(); ) {
      RefLikeType inclusion = (RefLikeType) i.next();
      if (inclusion instanceof RefType) {
        if (h.canStoreType(inclusion, catcher)) {
          caughtIncluded = addExceptionToSet(inclusion, caughtIncluded);
        } else {
          uncaughtIncluded = addExceptionToSet(inclusion, uncaughtIncluded);
        }
      } else {
        RefType base = ((AnySubType) inclusion).getBase();
        if (h.canStoreType(base, catcher)) {
          // All subtypes of base will be caught.  Any exclusions
          // will already have been copied to caughtExcluded by
          // the preceding loop.
          caughtIncluded = addExceptionToSet(inclusion, caughtIncluded);
        } else if (h.canStoreType(catcher, base)) {
          // Some subtypes of base will be caught, and
          // we know that not all of those catchable subtypes
          // are among exceptionsExcluded, since in that case we
          // would already have returned from within the
          // preceding loop.  So, remove AnySubType(catcher)
          // from the uncaught types.
          uncaughtIncluded = addExceptionToSet(inclusion, uncaughtIncluded);
          uncaughtExcluded = addExceptionToSet(AnySubType.v(catcher), uncaughtExcluded);
          caughtIncluded = addExceptionToSet(AnySubType.v(catcher), caughtIncluded);
          // Any already excluded subtypes of inclusion
          // which are subtypes of catcher will have been
          // added to caughtExcluded by the previous loop.
        } else {
          uncaughtIncluded = addExceptionToSet(inclusion, uncaughtIncluded);
        }
      }
    }
    ThrowableSet caughtSet = Manager.v().registerSetIfNew(caughtIncluded, caughtExcluded);
    ThrowableSet uncaughtSet = Manager.v().registerSetIfNew(uncaughtIncluded, uncaughtExcluded);
    return new Pair(caughtSet, uncaughtSet);
  }