How to detect Xcode debugger attached in runtime

public func isDebuggerAttached() -> Bool {
  #if DEBUG
    var info = kinfo_proc()
    var mib : [Int32] = [CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid()]
    var size = MemoryLayout<kinfo_proc>.stride
    let junk = sysctl(&mib, UInt32(mib.count), &info, &size, nil, 0)
    Log.assert(junk == 0, "sysctl failed")
    return (info.kp_proc.p_flag & P_TRACED) != 0
  #else
    return false
  #endif
}