我正在使用Xcode模拟信号处理程序 . 如何在控制台中传递信号?

(lldb) process handle -p1 -s0 SIGINT
NAME         PASS   STOP   NOTIFY
===========  =====  =====  ======
SIGINT       true   false  true 
(lldb) process signal SIGINT
error: Failed to send signal 2: failed to send signal 2
(lldb)

谢谢