我有以下问题：我想在进程进入阻塞情况（即阻塞函数或池循环）时恢复对gdb的控制。
让我们用一个例子来说明：我有进程A，它会分叉进程B.B做它的工作，然后卡在等待来自A的事件。我想把GDB切换到A所以我可以单独运行它直到事件代。但是，我无法从B中恢复GDB的控制。当然我可以在B中生成一个SIGINT信号ctrl + C，然后改为A，但是当我回到B时，即使我处理了传递SIGINT，B也会完成
Log:
Program received signal SIGINT, Interrupt.
[Switching to Thread 0xb68feb40 (LWP 3177)]
0xb7fdeb0c in ?? ()
(gdb) handle SIGINT pass
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) y
Signal Stop Print Pass to program Description
SIGINT Yes Yes Yes Interrupt
(gdb) c
Continuing.
[Thread 0xb7abcb40 (LWP 3178) exited]
[Thread 0xb68feb40 (LWP 3177) exited]
Couldn't get registers: No such process.
(gdb) info inferiors
Num Description
* 2 <null>
1 process 3168
有没有办法恢复GDB控制和切换过程而不杀死它？