Package scala.tools.asm

Examples of scala.tools.asm.Type


        return v;
    }

    @Override
    protected boolean isArrayValue(final BasicValue value) {
        Type t = value.getType();
        return t != null
                && ("Lnull;".equals(t.getDescriptor()) || t.getSort() == Type.ARRAY);
    }
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    }

    @Override
    protected BasicValue getElementValue(final BasicValue objectArrayValue)
            throws AnalyzerException {
        Type arrayType = objectArrayValue.getType();
        if (arrayType != null) {
            if (arrayType.getSort() == Type.ARRAY) {
                return newValue(Type.getType(arrayType.getDescriptor()
                        .substring(1)));
            } else if ("Lnull;".equals(arrayType.getDescriptor())) {
                return objectArrayValue;
            }
        }
        throw new Error("Internal error");
    }
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    }

    @Override
    protected boolean isSubTypeOf(final BasicValue value,
            final BasicValue expected) {
        Type expectedType = expected.getType();
        Type type = value.getType();
        switch (expectedType.getSort()) {
        case Type.INT:
        case Type.FLOAT:
        case Type.LONG:
        case Type.DOUBLE:
            return type.equals(expectedType);
        case Type.ARRAY:
        case Type.OBJECT:
            if ("Lnull;".equals(type.getDescriptor())) {
                return true;
            } else if (type.getSort() == Type.OBJECT
                    || type.getSort() == Type.ARRAY) {
                return isAssignableFrom(expectedType, type);
            } else {
                return false;
            }
        default:
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                buf.append(tab3);
                Object cst = bsmArgs[i];
                if (cst instanceof String) {
                    Printer.appendString(buf, (String) cst);
                } else if (cst instanceof Type) {
                    Type type = (Type) cst;
                    if(type.getSort() == Type.METHOD){
                        appendDescriptor(METHOD_DESCRIPTOR, type.getDescriptor());
                    } else {
                        buf.append(type.getDescriptor()).append(".class");
                    }
                } else if (cst instanceof Handle) {
                    appendHandle((Handle) cst);
                } else {
                    buf.append(cst);
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    }

    @Override
    public BasicValue merge(final BasicValue v, final BasicValue w) {
        if (!v.equals(w)) {
            Type t = v.getType();
            Type u = w.getType();
            if (t != null
                    && (t.getSort() == Type.OBJECT || t.getSort() == Type.ARRAY)) {
                if (u != null
                        && (u.getSort() == Type.OBJECT || u.getSort() == Type.ARRAY)) {
                    if ("Lnull;".equals(t.getDescriptor())) {
                        return w;
                    }
                    if ("Lnull;".equals(u.getDescriptor())) {
                        return v;
                    }
                    if (isAssignableFrom(t, u)) {
                        return v;
                    }
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            if (isAssignableFrom(t, currentSuperClass)) {
                return true;
            }
            if (currentClassInterfaces != null) {
                for (int i = 0; i < currentClassInterfaces.size(); ++i) {
                    Type v = currentClassInterfaces.get(i);
                    if (isAssignableFrom(t, v)) {
                        return true;
                    }
                }
            }
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            }
        } else {
            int i = 0;
            int j = 0;
            if (opcode != INVOKESTATIC && opcode != INVOKEDYNAMIC) {
                Type owner = Type.getObjectType(((MethodInsnNode) insn).owner);
                if (!isSubTypeOf(values.get(i++), newValue(owner))) {
                    throw new AnalyzerException(insn, "Method owner",
                            newValue(owner), values.get(0));
                }
            }
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    public static void verify(final ClassReader cr, final ClassLoader loader,
            final boolean dump, final PrintWriter pw) {
        ClassNode cn = new ClassNode();
        cr.accept(new CheckClassAdapter(cn, false), ClassReader.SKIP_DEBUG);

        Type syperType = cn.superName == null ? null : Type
                .getObjectType(cn.superName);
        List<MethodNode> methods = cn.methods;

        List<Type> interfaces = new ArrayList<Type>();
        for (Iterator<String> i = cn.interfaces.iterator(); i.hasNext();) {
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        Frame<V> handler = newFrame(m.maxLocals, m.maxStack);
        current.setReturn(interpreter.newValue(Type.getReturnType(m.desc)));
        Type[] args = Type.getArgumentTypes(m.desc);
        int local = 0;
        if ((m.access & ACC_STATIC) == 0) {
            Type ctype = Type.getObjectType(owner);
            current.setLocal(local++, interpreter.newValue(ctype));
        }
        for (int i = 0; i < args.length; ++i) {
            current.setLocal(local++, interpreter.newValue(args[i]));
            if (args[i].getSize() == 2) {
                current.setLocal(local++, interpreter.newValue(null));
            }
        }
        while (local < m.maxLocals) {
            current.setLocal(local++, interpreter.newValue(null));
        }
        merge(0, current, null);

        init(owner, m);

        // control flow analysis
        while (top > 0) {
            int insn = queue[--top];
            Frame<V> f = frames[insn];
            Subroutine subroutine = subroutines[insn];
            queued[insn] = false;

            AbstractInsnNode insnNode = null;
            try {
                insnNode = m.instructions.get(insn);
                int insnOpcode = insnNode.getOpcode();
                int insnType = insnNode.getType();

                if (insnType == AbstractInsnNode.LABEL
                        || insnType == AbstractInsnNode.LINE
                        || insnType == AbstractInsnNode.FRAME) {
                    merge(insn + 1, f, subroutine);
                    newControlFlowEdge(insn, insn + 1);
                } else {
                    current.init(f).execute(insnNode, interpreter);
                    subroutine = subroutine == null ? null : subroutine.copy();

                    if (insnNode instanceof JumpInsnNode) {
                        JumpInsnNode j = (JumpInsnNode) insnNode;
                        if (insnOpcode != GOTO && insnOpcode != JSR) {
                            merge(insn + 1, current, subroutine);
                            newControlFlowEdge(insn, insn + 1);
                        }
                        int jump = insns.indexOf(j.label);
                        if (insnOpcode == JSR) {
                            merge(jump, current, new Subroutine(j.label,
                                    m.maxLocals, j));
                        } else {
                            merge(jump, current, subroutine);
                        }
                        newControlFlowEdge(insn, jump);
                    } else if (insnNode instanceof LookupSwitchInsnNode) {
                        LookupSwitchInsnNode lsi = (LookupSwitchInsnNode) insnNode;
                        int jump = insns.indexOf(lsi.dflt);
                        merge(jump, current, subroutine);
                        newControlFlowEdge(insn, jump);
                        for (int j = 0; j < lsi.labels.size(); ++j) {
                            LabelNode label = lsi.labels.get(j);
                            jump = insns.indexOf(label);
                            merge(jump, current, subroutine);
                            newControlFlowEdge(insn, jump);
                        }
                    } else if (insnNode instanceof TableSwitchInsnNode) {
                        TableSwitchInsnNode tsi = (TableSwitchInsnNode) insnNode;
                        int jump = insns.indexOf(tsi.dflt);
                        merge(jump, current, subroutine);
                        newControlFlowEdge(insn, jump);
                        for (int j = 0; j < tsi.labels.size(); ++j) {
                            LabelNode label = tsi.labels.get(j);
                            jump = insns.indexOf(label);
                            merge(jump, current, subroutine);
                            newControlFlowEdge(insn, jump);
                        }
                    } else if (insnOpcode == RET) {
                        if (subroutine == null) {
                            throw new AnalyzerException(insnNode,
                                    "RET instruction outside of a sub routine");
                        }
                        for (int i = 0; i < subroutine.callers.size(); ++i) {
                            JumpInsnNode caller = subroutine.callers.get(i);
                            int call = insns.indexOf(caller);
                            if (frames[call] != null) {
                                merge(call + 1, frames[call], current,
                                        subroutines[call], subroutine.access);
                                newControlFlowEdge(insn, call + 1);
                            }
                        }
                    } else if (insnOpcode != ATHROW
                            && (insnOpcode < IRETURN || insnOpcode > RETURN)) {
                        if (subroutine != null) {
                            if (insnNode instanceof VarInsnNode) {
                                int var = ((VarInsnNode) insnNode).var;
                                subroutine.access[var] = true;
                                if (insnOpcode == LLOAD || insnOpcode == DLOAD
                                        || insnOpcode == LSTORE
                                        || insnOpcode == DSTORE) {
                                    subroutine.access[var + 1] = true;
                                }
                            } else if (insnNode instanceof IincInsnNode) {
                                int var = ((IincInsnNode) insnNode).var;
                                subroutine.access[var] = true;
                            }
                        }
                        merge(insn + 1, current, subroutine);
                        newControlFlowEdge(insn, insn + 1);
                    }
                }

                List<TryCatchBlockNode> insnHandlers = handlers[insn];
                if (insnHandlers != null) {
                    for (int i = 0; i < insnHandlers.size(); ++i) {
                        TryCatchBlockNode tcb = insnHandlers.get(i);
                        Type type;
                        if (tcb.type == null) {
                            type = Type.getObjectType("java/lang/Throwable");
                        } else {
                            type = Type.getObjectType(tcb.type);
                        }
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