gdb scheduler-locking

show scheduler-locking  gdb线程调试 显示线程状态
set scheduler-locking on gdb调试加锁当前线程，其他线程停止


(gdb) set scheduler-locking off
(gdb) show schedule
schedule-multiple  scheduler-locking  
(gdb) show scheduler-locking 
Mode for locking scheduler during execution is "off".
(gdb) set scheduler-locking step
(gdb) show scheduler-locking 
Mode for locking scheduler during execution is "step".
(gdb) set scheduler-locking on
(gdb) show scheduler-locking 
Mode for locking scheduler during execution is "on".