/*-
* Copyright (c) 2002, 2008, 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn and Jaromir Dolecek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_sig.c,v 1.5 2024/07/10 22:03:59 rillig Exp $");
/*
* This test case exercises code paths in the kernel that KASSERT()
* some assumptions about EVFILT_SIGNAL and EVFILT_PROC implementation
* details.
*/
ATF_TC(sig_and_proc);
ATF_TC_HEAD(sig_and_proc, tc)
{
atf_tc_set_md_var(tc, "descr",
"Validates implementation detail assumptions about "
"EVFILT_SIGNAL and EVFILT_PROC");
}
ATF_TC_BODY(sig_and_proc, tc)
{
struct kevent events[3];
pid_t pid;
int kq;
pid = fork();
ATF_REQUIRE(pid != -1);
if (pid == 0) {
/*
* Child: create a kqueue and attach signal knotes
* to curproc->p_klist.
*/
kq = kqueue();
ATF_REQUIRE(kq >= 0);
/*
* When we exit here, the kernel will close all of
* its file descriptors (including our kq), which
* will in turn remove the signal notes from
* curproc->p_klist.
*
* Then, later on, the kernel will post a NOTE_EXIT
* on our parent's kqueue using the proc note that
* our parent attached to (our) curproc->p_klist.
* That code path KASSERT()s that the signal knotes
* have already been removed.
*/
_exit(0);
}
/*
* Parent: create a kqueue and attach a proc note to
* child->p_klist.
*/
kq = kqueue();
ATF_REQUIRE(kq >= 0);