Examples with ErroneousType soot.ErroneousType used on opensource projects

Example 1 with ErroneousType

use of soot.ErroneousType in project soot by Sable.

the class LocalNameStandardizer method internalTransform.

@Override
protected void internalTransform(Body body, String phaseName, Map<String, String> options) {
    boolean onlyStackName = PhaseOptions.getBoolean(options, "only-stack-locals");
    boolean sortLocals = PhaseOptions.getBoolean(options, "sort-locals");
    final BooleanType booleanType = BooleanType.v();
    final ByteType byteType = ByteType.v();
    final ShortType shortType = ShortType.v();
    final CharType charType = CharType.v();
    final IntType intType = IntType.v();
    final LongType longType = LongType.v();
    final DoubleType doubleType = DoubleType.v();
    final FloatType floatType = FloatType.v();
    final ErroneousType erroneousType = ErroneousType.v();
    final UnknownType unknownType = UnknownType.v();
    final StmtAddressType stmtAddressType = StmtAddressType.v();
    final NullType nullType = NullType.v();
    // Change the names to the standard forms now.
    {
        int objectCount = 0;
        int intCount = 0;
        int longCount = 0;
        int floatCount = 0;
        int doubleCount = 0;
        int addressCount = 0;
        int errorCount = 0;
        int nullCount = 0;
        /* The goal of this option is to ensure that local ordering remains
             * consistent between different iterations of soot. This helps to ensure
             * things like stable string representations of instructions and stable
             * jimple representations of a methods body when soot is used to load
             * the same code in different iterations.
             * 
             * First sorts the locals alphabetically by the string representation of
             * their type. Then if there are two locals with the same type, it uses
             * the only other source of structurally stable information (i.e. the 
             * instructions themselves) to produce an ordering for the locals
             * that remains consistent between different soot instances. It achieves
             * this by determining the position of a local's first occurrence in the 
             * instruction's list of definition statements. This position is then used
             * to sort the locals with the same type in an ascending order. 
             * 
             * The only times that this may not produce a consistent ordering for the 
             * locals between different soot instances is if a local is never defined in
             * the instructions or if the instructions themselves are changed in some way
             * that effects the ordering of the locals. In the first case, if a local is 
             * never defined, the other jimple body phases will remove this local as it is 
             * unused. As such, all we have to do is rerun this LocalNameStandardizer after
             * all other jimple body phases to eliminate any ambiguity introduced by these
             * phases and by the removed unused locals. In the second case, if the instructions
             * themselves changed then the user would have had to intentionally told soot to
             * modify the instructions of the code. Otherwise, the instructions would not have
             * changed because we assume the instructions to always be structurally stable
             * between different instances of soot. As such, in this instance, the user should
             * not be expecting soot to produce the same output as the input and thus the
             * ordering of the locals does not matter.
             */
        if (sortLocals) {
            Chain<Local> locals = body.getLocals();
            final List<ValueBox> defs = body.getDefBoxes();
            ArrayList<Local> sortedLocals = new ArrayList<Local>(locals);
            Collections.sort(sortedLocals, new Comparator<Local>() {

                private Map<Local, Integer> firstOccuranceCache = new HashMap<Local, Integer>();

                @Override
                public int compare(Local arg0, Local arg1) {
                    int ret = arg0.getType().toString().compareTo(arg1.getType().toString());
                    if (ret == 0) {
                        ret = Integer.compare(getFirstOccurance(arg0), getFirstOccurance(arg1));
                    }
                    return ret;
                }

                private int getFirstOccurance(Local l) {
                    Integer cur = firstOccuranceCache.get(l);
                    if (cur != null) {
                        return cur;
                    } else {
                        int count = 0;
                        int first = -1;
                        for (ValueBox vb : defs) {
                            Value v = vb.getValue();
                            if (v instanceof Local && v.equals(l)) {
                                first = count;
                                break;
                            }
                            count++;
                        }
                        firstOccuranceCache.put(l, first);
                        return first;
                    }
                }
            });
            locals.clear();
            locals.addAll(sortedLocals);
        }
        for (Local l : body.getLocals()) {
            String prefix = "";
            if (l.getName().startsWith("$"))
                prefix = "$";
            else {
                if (onlyStackName)
                    continue;
            }
            final Type type = l.getType();
            if (type.equals(booleanType))
                l.setName(prefix + "z" + intCount++);
            else if (type.equals(byteType))
                l.setName(prefix + "b" + longCount++);
            else if (type.equals(shortType))
                l.setName(prefix + "s" + longCount++);
            else if (type.equals(charType))
                l.setName(prefix + "c" + longCount++);
            else if (type.equals(intType))
                l.setName(prefix + "i" + longCount++);
            else if (type.equals(longType))
                l.setName(prefix + "l" + longCount++);
            else if (type.equals(doubleType))
                l.setName(prefix + "d" + doubleCount++);
            else if (type.equals(floatType))
                l.setName(prefix + "f" + floatCount++);
            else if (type.equals(stmtAddressType))
                l.setName(prefix + "a" + addressCount++);
            else if (type.equals(erroneousType) || type.equals(unknownType)) {
                l.setName(prefix + "e" + errorCount++);
            } else if (type.equals(nullType))
                l.setName(prefix + "n" + nullCount++);
            else
                l.setName(prefix + "r" + objectCount++);
        }
    }
}