Breakpoint 1 at 0x........: file clean_after_fork.c, line 9.
Breakpoint 2 at 0x........: file clean_after_fork.c, line 20.
Breakpoint 3 at 0x........: file clean_after_fork.c, line 22.
Continuing.
Breakpoint 1, main () at clean_after_fork.c:9
9	   pid = fork();
Hardware read watchpoint 4: mem
Continuing.
Hardware read watchpoint 4: mem
Value = 0
main () at clean_after_fork.c:34
34	   if (mem == 0)