高分求GDB如何调试多进程

[oyxiaoyu0]

我有一个总控进程maincollect.c，这个总控进程负责启动多个子进程collect来处理
程序编译后会生成两个可执行文件maincollect.c和collect.
我启动maincollect start
然后gdb maincollect (gdb) b maincollect.c:152说No source file named maincollect.c.
gdb collect
(gdb) b zftp.c:3556也说No source file named maincollect.c.

请问该如何能够进入collect子进程中的某一个函数进行跟踪呢

[珍惜生命远离CPP]

这个可以设置线程内的函数断点.

[hundlom]

需要的gdb版本高一些
详细解释如下：
Multiprocess Application Debugging
One problem with the debugging of multiprocess applications is which process to follow when a new process is created. Recall from Chapter 12, “Introduction to Sockets Programming,” that the fork function returns to both the parent and child processes. We can tell GDB which to returns to follow using the follow-fork-mode command. For example, if we wanted to debug the child process, we’d specify to follow the child process as:

set follow-fork-mode child
Or, if we instead wanted to follow the parent (the default mode), we’d specify this as:

set follow-fork-mode parent
In either case, when GDB follows one process, the other process (child or parent) continues to run unimpeded. We can also tell GDB to ask us which process to follow when a fork occurs, as:

set follow-fork-mode ask
When the fork occurs, GDB will ask which to follow. Whichever is not followed will execute normally.

[悠悠长风]

这个跟系统相关。跟你说一个，在gdb中执行set follow-fork-makde child

[liukai60268]

软件开发与技术交流群40271625

[coolfishbone_joey]

这个比较有用，但是如果要用到信号怎么切换进程呢。能否请教您一下。谢谢。