Example: Multi-process Breakpoint

The following program excerpt illustrates the places where you can set breakpoints in a multi-process program:

1 pid = fork();

2 if (pid == –1)

3 error ("fork failed");

4 else if (pid == 0)

5 children_play();

6 else

7 parents_work();

The following table describes what happens when you set a breakpoint at different places:

 

Line Number	Result
1	Stops the parent process before it forks.
2	Stops both the parent and child processes.
3	Stops the parent process if the fork() function failed.
5	Stops the child process.
7	Stops the parent process.