[PATCH 40] PTRACE_EVENT_VFORK_DONE: set ev_options = PTRACE_O_TRACEVFORKDONE

[Oleg Nesterov]

PTRACE_EVENT_VFORK_DONE should not be reported if the tracer cleared
PTRACE_O_TRACEVFORKDONE after the tracee stopped in PTRACE_EVENT_VFORK
report. Now that we have ptrace_event->ev_options this is trivial.


ptrace_report_clone() still needs more changes. I think it is simple to
fix it now, but can't we simplify the utrace's behaviour first?

utrace_report_clone() does not set utrace->vfork_stop without CLONE_VFORK,
this adds some complications. Perhaps we can kill CLONE_VFORK check?

---

 kernel/ptrace.c |    1 +
 1 file changed, 1 insertion(+)

--- PU/kernel/ptrace.c~40_EV_O_TRACEVFORKDONE   2009-09-15 19:47:50.000000000 
+0200
+++ PU/kernel/ptrace.c  2009-09-15 20:40:35.000000000 +0200
@@ -283,6 +283,7 @@ static u32 ptrace_report_clone(enum utra
                struct ptrace_event *ev = ev_push(context);
 
                ev->ev_message = child->pid;
+               ev->ev_options = PTRACE_O_TRACEVFORKDONE;
                ev->ev_code = (PTRACE_EVENT_VFORK_DONE << 8) | SIGTRAP;
 
                ret = UTRACE_STOP;