exit

Linux v6.6: kernel/exit.c
Linux v6.6: kernel/signal.c
Linux v6.6: kernel/fork.c

		signal->group_stop_count = 0;
	}
	spin_unlock_irq(&sighand->siglock);
}

void __noreturn do_exit(long code)
{
	struct task_struct *tsk = current;
	int group_dead;

	WARN_ON(irqs_disabled());

	synchronize_group_exit(tsk, code);

	WARN_ON(tsk->plug);

	kcov_task_exit(tsk);
	kmsan_task_exit(tsk);

	coredump_task_exit(tsk);
	ptrace_event(PTRACE_EVENT_EXIT, code);
	user_events_exit(tsk);

	validate_creds_for_do_exit(tsk);

	io_uring_files_cancel();
	exit_signals(tsk);  /* sets PF_EXITING */

	/* sync mm's RSS info before statistics gathering */
	if (tsk->mm)
		sync_mm_rss(tsk->mm);
	acct_update_integrals(tsk);
	group_dead = atomic_dec_and_test(&tsk->signal->live);
	if (group_dead) {
		/*
		 * If the last thread of global init has exited, panic
		 * immediately to get a useable coredump.
		 */
		if (unlikely(is_global_init(tsk)))
			panic("Attempted to kill init! exitcode=0x%08x\n",

/*
 * Send signals to all our closest relatives so that they know
 * to properly mourn us..
 */
static void exit_notify(struct task_struct *tsk, int group_dead)
{
	bool autoreap;
	struct task_struct *p, *n;
	LIST_HEAD(dead);

	write_lock_irq(&tasklist_lock);
	forget_original_parent(tsk, &dead);

	if (group_dead)
		kill_orphaned_pgrp(tsk->group_leader, NULL);

	tsk->exit_state = EXIT_ZOMBIE;
	if (unlikely(tsk->ptrace)) {
		int sig = thread_group_leader(tsk) &&
				thread_group_empty(tsk) &&
				!ptrace_reparented(tsk) ?
			tsk->exit_signal : SIGCHLD;
		autoreap = do_notify_parent(tsk, sig);
	} else if (thread_group_leader(tsk)) {
		autoreap = thread_group_empty(tsk) &&
			do_notify_parent(tsk, tsk->exit_signal);
	} else {
		autoreap = true;
	}

	if (autoreap) {
		tsk->exit_state = EXIT_DEAD;
		list_add(&tsk->ptrace_entry, &dead);
	}

	/* mt-exec, de_thread() is waiting for group leader */
	if (unlikely(tsk->signal->notify_count < 0))
		wake_up_process(tsk->signal->group_exec_task);
	write_unlock_irq(&tasklist_lock);