Function create_zircon_process 

pub fn create_zircon_process(
    kernel: &Arc<Kernel>,
    parent: Option<ThreadGroupWriteGuard<'_>>,
    pid: pid_t,
    exit_signal: Option<Signal>,
    process_group: Arc<ProcessGroup>,
    signal_actions: Arc<SignalActions>,
    name: TaskCommand,
) -> Result<TaskInfo, Errno>