void silent_exit(void) {
struct task_struct *parent;
write_lock_irq(&tasklist_lock);
parent = current->parent;
if (BPROC_ISMASQ(current)) {
/* unmasq includes a re-parent step */
masq_remove_proc(current, 0);
} else {
/* Reparent self to init */
current->exit_signal = SIGCHLD;
set_parents(current, child_reaper, child_reaper);
}
__wake_up_parent(current,parent);
write_unlock_irq(&tasklist_lock);
do_exit(0);
}
/*
* Called with tasklist_lock held for writing.
* Unlink a traced task, and clean it up if it was a traced zombie.
* Return true if it needs to be reaped with release_task().
* (We can't call release_task() here because we already hold tasklist_lock.)
*
* If it's a zombie, our attachedness prevented normal parent notification
* or self-reaping. Do notification now if it would have happened earlier.
* If it should reap itself, return true.
*
* If it's our own child, there is no notification to do. But if our normal
* children self-reap, then this child was prevented by ptrace and we must
* reap it now, in that case we must also wake up sub-threads sleeping in
* do_wait().
*/
static bool __ptrace_detach(struct task_struct *tracer, struct task_struct *p)
{
__ptrace_unlink(p);
if (p->exit_state == EXIT_ZOMBIE) {
if (!task_detached(p) && thread_group_empty(p)) {
if (!same_thread_group(p->real_parent, tracer))
do_notify_parent(p, p->exit_signal);
else if (ignoring_children(tracer->sighand)) {
__wake_up_parent(p, tracer);
p->exit_signal = -1;
}
}
if (task_detached(p)) {
/* Mark it as in the process of being reaped. */
p->exit_state = EXIT_DEAD;
return true;
}
}
return false;
}