NetBSD/tests/kernel/t_ksem.c
thorpej 68e270a267 Implement support for "pshared" POSIX semaphores.
Fixes lib/53273 (and Firefox's multi-process tab feature).
2019-02-03 03:20:23 +00:00

146 lines
4.3 KiB
C

/* $NetBSD: t_ksem.c,v 1.1 2019/02/03 03:20:24 thorpej Exp $ */
/*
* Copyright (c) 2019 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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) 2019\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_ksem.c,v 1.1 2019/02/03 03:20:24 thorpej Exp $");
#include <sys/mman.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <atf-c.h>
#define _LIBC
#include <sys/ksem.h>
ATF_TC(close_on_unnamed);
ATF_TC_HEAD(close_on_unnamed, tc)
{
atf_tc_set_md_var(tc, "descr",
"test for correct error on close of unnamed semaphore");
}
ATF_TC_BODY(close_on_unnamed, tc)
{
intptr_t ksem;
/* _ksem_close() is invalid on unnamed semaphore. */
ksem = 0;
ATF_REQUIRE_EQ(_ksem_init(0, &ksem), 0);
ATF_REQUIRE(_ksem_close(ksem) == -1 && errno == EINVAL);
ATF_REQUIRE_EQ(_ksem_destroy(ksem), 0);
}
ATF_TC(close_on_unnamed_pshared);
ATF_TC_HEAD(close_on_unnamed_pshared, tc)
{
atf_tc_set_md_var(tc, "descr",
"test for correct error on close of unnamed pshared semaphore");
}
ATF_TC_BODY(close_on_unnamed_pshared, tc)
{
intptr_t ksem;
/* Similar, but lifecycle of pshared is slightly different. */
ksem = KSEM_PSHARED;
ATF_REQUIRE_EQ(_ksem_init(0, &ksem), 0);
ATF_REQUIRE(_ksem_close(ksem) == -1 && errno == EINVAL);
ATF_REQUIRE_EQ(_ksem_destroy(ksem), 0);
}
ATF_TC_WITH_CLEANUP(destroy_on_named);
ATF_TC_HEAD(destroy_on_named, tc)
{
atf_tc_set_md_var(tc, "descr",
"test for correct error on destroy of named semaphore");
}
ATF_TC_BODY(destroy_on_named, tc)
{
intptr_t ksem;
/* Exercise open-unlinked semaphore lifecycle. */
ATF_REQUIRE_EQ(_ksem_open("/ksem_x", O_CREAT | O_EXCL, 0644, 0, &ksem),
0);
ATF_REQUIRE(_ksem_destroy(ksem) == -1 && errno == EINVAL);
ATF_REQUIRE_EQ(_ksem_close(ksem), 0);
ATF_REQUIRE_EQ(_ksem_unlink("/ksem_x"), 0);
}
ATF_TC_CLEANUP(destroy_on_named, tc)
{
(void)_ksem_unlink("/ksem_x");
}
ATF_TC_WITH_CLEANUP(open_unlinked_lifecycle);
ATF_TC_HEAD(open_unlinked_lifecycle, tc)
{
atf_tc_set_md_var(tc, "descr",
"Exercises lifecycle of open-unlined semaphores");
}
ATF_TC_BODY(open_unlinked_lifecycle, tc)
{
intptr_t ksem, ksem1;
int val;
/* Exercise open-unlinked semaphore lifecycle. */
ATF_REQUIRE_EQ(_ksem_open("/ksem_b", O_CREAT | O_EXCL, 0644, 0, &ksem),
0);
ATF_REQUIRE_EQ(_ksem_unlink("/ksem_b"), 0);
val = 255;
ATF_REQUIRE(_ksem_getvalue(ksem, &val) == 0 && val == 0);
ATF_REQUIRE_EQ(_ksem_open("/ksem_b", O_CREAT | O_EXCL, 0644, 1, &ksem1),
0);
ATF_REQUIRE_EQ(_ksem_unlink("/ksem_b"), 0);
val = 255;
ATF_REQUIRE(_ksem_getvalue(ksem1, &val) == 0 && val == 1);
ATF_REQUIRE_EQ(_ksem_close(ksem), 0);
ATF_REQUIRE_EQ(_ksem_close(ksem1), 0);
}
ATF_TC_CLEANUP(open_unlinked_lifecycle, tc)
{
(void)_ksem_unlink("/ksem_a");
(void)_ksem_unlink("/ksem_b");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, close_on_unnamed);
ATF_TP_ADD_TC(tp, close_on_unnamed_pshared);
ATF_TP_ADD_TC(tp, destroy_on_named);
ATF_TP_ADD_TC(tp, open_unlinked_lifecycle);
return atf_no_error();
}