minix/tests/lib/libc/sys/t_getrusage.c

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/* $NetBSD: t_getrusage.c,v 1.2 2011/08/22 00:33:16 dholland Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jukka Ruohonen.
*
* 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>
__RCSID("$NetBSD: t_getrusage.c,v 1.2 2011/08/22 00:33:16 dholland Exp $");
#include <sys/resource.h>
#include <sys/time.h>
#include <atf-c.h>
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdint.h>
#include <string.h>
static void work(void);
static void sighandler(int);
static const size_t maxiter = 2000;
static void
sighandler(int signo)
{
/* Nothing. */
}
static void
work(void)
{
size_t n = UINT16_MAX * 10;
while (n > 0) {
asm volatile("nop"); /* Do something. */
n--;
}
}
ATF_TC(getrusage_err);
ATF_TC_HEAD(getrusage_err, tc)
{
atf_tc_set_md_var(tc, "descr", "Test error conditions");
}
ATF_TC_BODY(getrusage_err, tc)
{
struct rusage ru;
errno = 0;
ATF_REQUIRE(getrusage(INT_MAX, &ru) != 0);
ATF_REQUIRE(errno == EINVAL);
errno = 0;
ATF_REQUIRE(getrusage(RUSAGE_SELF, (void *)0) != 0);
ATF_REQUIRE(errno == EFAULT);
}
ATF_TC(getrusage_sig);
ATF_TC_HEAD(getrusage_sig, tc)
{
atf_tc_set_md_var(tc, "descr", "Test signal count with getrusage(2)");
}
ATF_TC_BODY(getrusage_sig, tc)
{
struct rusage ru;
const long n = 5;
int i;
/*
* Test that signals are recorded.
*/
ATF_REQUIRE(signal(SIGUSR1, sighandler) != SIG_ERR);
for (i = 0; i < n; i++)
ATF_REQUIRE(raise(SIGUSR1) == 0);
(void)memset(&ru, 0, sizeof(struct rusage));
ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
if (n != ru.ru_nsignals)
atf_tc_fail("getrusage(2) did not record signals");
}
ATF_TC(getrusage_utime_back);
ATF_TC_HEAD(getrusage_utime_back, tc)
{
atf_tc_set_md_var(tc, "descr", "Test bogus values from getrusage(2)");
}
ATF_TC_BODY(getrusage_utime_back, tc)
{
struct rusage ru1, ru2;
size_t i;
/*
* Test that two consecutive calls are sane.
*/
atf_tc_expect_fail("PR kern/30115");
for (i = 0; i < maxiter; i++) {
(void)memset(&ru1, 0, sizeof(struct rusage));
(void)memset(&ru2, 0, sizeof(struct rusage));
work();
ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru1) == 0);
work();
ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru2) == 0);
if (timercmp(&ru2.ru_utime, &ru1.ru_utime, <) != 0)
atf_tc_fail("user time went backwards");
}
atf_tc_fail("anticipated error did not occur");
}
ATF_TC(getrusage_utime_zero);
ATF_TC_HEAD(getrusage_utime_zero, tc)
{
atf_tc_set_md_var(tc, "descr", "Test zero utime from getrusage(2)");
}
ATF_TC_BODY(getrusage_utime_zero, tc)
{
struct rusage ru;
size_t i;
/*
* Test that getrusage(2) does not return
* zero user time for the calling process.
*
* See also (duplicate) PR port-amd64/41734.
*/
atf_tc_expect_fail("PR kern/30115");
for (i = 0; i < maxiter; i++) {
work();
(void)memset(&ru, 0, sizeof(struct rusage));
ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
if (ru.ru_utime.tv_sec == 0 && ru.ru_utime.tv_usec == 0)
atf_tc_fail("zero user time from getrusage(2)");
}
atf_tc_fail("anticipated error did not occur");
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, getrusage_err);
ATF_TP_ADD_TC(tp, getrusage_sig);
ATF_TP_ADD_TC(tp, getrusage_utime_back);
ATF_TP_ADD_TC(tp, getrusage_utime_zero);
return atf_no_error();
}