Check if a debugger attached.

debugger.m

- (BOOL)Debugger{
    
    static BOOL debuggerIsAttached = NO;
    
    static dispatch_once_t debuggerPredicate;
    dispatch_once(&debuggerPredicate, ^{
        
        struct kinfo_proc info;
        size_t info_size = sizeof(info);
        int name[4];
        
        name[0] = CTL_KERN;
        name[1] = KERN_PROC;
        name[2] = KERN_PROC_PID;
        name[3] = getpid();
        if (sysctl(name, 4, &info, &info_size, NULL, 0) == -1) {
            debuggerIsAttached = false;
        }
        
        if (!debuggerIsAttached && (info.kp_proc.p_flag & P_TRACED) != 0)
            debuggerIsAttached = true;
    });
    return debuggerIsAttached;
}