#vulnerable code 
                                public void sendFrame(Frame frame) {
        /* Try to open BCM connection if not present */
        if(url != null) {
            openBCMConnection();
            
            if (bcmConnection != null) {
                bcmConnection.sendFrame(frame);
            }  
        /* If no BCM connection is present we have to do loopback locally */
        } else {
            frame.setTimestamp(timeSource.getTime());
            deliverBCMFrame(frame);
            deliverRAWFrame(frame);
        }
    } 
                            #location 3 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public void sendFrame(Frame frame) {
        /* Try to open BCM connection if not present */
        if(url != null) {
            openBCMConnection();

            if (bcmConnection != null) {
                bcmConnection.sendFrame(frame);
            }
        /* If no BCM connection is present we have to do loopback locally */
        } else {
            frame.setTimestamp(timeSource.getTime());
            deliverBCMFrame(frame);
            deliverRAWFrame(frame);
        }
    }