#vulnerable code 
                                public ByteBuffer asByteBuffer() {
        if (isNull()) {
            return null;
        }
        if (limit > 0 && limit < position) {
            throw new IllegalArgumentException("limit < position: (" + limit + " < " + position + ")");
        }
        int valueSize = sizeof();
        long arrayPosition = position;
        long arrayLimit = limit;
        position = valueSize * arrayPosition;
        limit = valueSize * (arrayLimit <= 0 ? arrayPosition + 1 : arrayLimit);
        ByteBuffer b = asDirectBuffer().order(ByteOrder.nativeOrder());
        position = arrayPosition;
        limit = arrayLimit;
        return b;
    } 
                            #location 2 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public ByteBuffer asByteBuffer() {
        if (isNull()) {
            return null;
        }
        if (limit > 0 && limit < position) {
            throw new IllegalArgumentException("limit < position: (" + limit + " < " + position + ")");
        }
        int size = sizeof();
        Pointer p = new Pointer();
        p.address = address;
        return p.position(size * position)
                .limit(size * (limit <= 0 ? position + 1 : limit))
                .asDirectBuffer().order(ByteOrder.nativeOrder());
    }