From fa00b80b3c41a845b3d56f866fb40a2e98754c51 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 25 Jul 2008 19:45:54 -0700 Subject: tracehook: job control This defines the tracehook_notify_jctl() hook to formalize the ptrace effects on the job control notifications. There is no change, only cleanup. Signed-off-by: Roland McGrath Cc: Oleg Nesterov Reviewed-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/tracehook.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/linux/tracehook.h') diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h index 42a0d7b11959..6dc428dd2f38 100644 --- a/include/linux/tracehook.h +++ b/include/linux/tracehook.h @@ -451,4 +451,24 @@ static inline int tracehook_get_signal(struct task_struct *task, return 0; } +/** + * tracehook_notify_jctl - report about job control stop/continue + * @notify: nonzero if this is the last thread in the group to stop + * @why: %CLD_STOPPED or %CLD_CONTINUED + * + * This is called when we might call do_notify_parent_cldstop(). + * It's called when about to stop for job control; we are already in + * %TASK_STOPPED state, about to call schedule(). It's also called when + * a delayed %CLD_STOPPED or %CLD_CONTINUED report is ready to be made. + * + * Return nonzero to generate a %SIGCHLD with @why, which is + * normal if @notify is nonzero. + * + * Called with no locks held. + */ +static inline int tracehook_notify_jctl(int notify, int why) +{ + return notify || (current->ptrace & PT_PTRACED); +} + #endif /* */ -- cgit v1.2.3-59-g8ed1b