tests/lib/libc/sys/t_getrusage.c

   1 /* $NetBSD: t_getrusage.c,v 1.2 2011/08/22 00:33:16 dholland Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jukka Ruohonen.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 __RCSID("$NetBSD: t_getrusage.c,v 1.2 2011/08/22 00:33:16 dholland Exp $");
  33
  34 #include <sys/resource.h>
  35 #include <sys/time.h>
  36
  37 #include <atf-c.h>
  38 #include <errno.h>
  39 #include <limits.h>
  40 #include <signal.h>
  41 #include <stdint.h>
  42 #include <string.h>
  43
  44 static void             work(void);
  45 static void             sighandler(int);
  46
  47 static const size_t     maxiter = 2000;
  48
  49 static void
  50 sighandler(int signo)
  51 {
  52         /* Nothing. */
  53 }
  54
  55 static void
  56 work(void)
  57 {
  58         size_t n = UINT16_MAX * 10;
  59
  60         while (n > 0) {
  61                  asm volatile("nop");   /* Do something. */
  62                  n--;
  63         }
  64 }
  65
  66 ATF_TC(getrusage_err);
  67 ATF_TC_HEAD(getrusage_err, tc)
  68 {
  69         atf_tc_set_md_var(tc, "descr", "Test error conditions");
  70 }
  71
  72 ATF_TC_BODY(getrusage_err, tc)
  73 {
  74         struct rusage ru;
  75
  76         errno = 0;
  77
  78         ATF_REQUIRE(getrusage(INT_MAX, &ru) != 0);
  79         ATF_REQUIRE(errno == EINVAL);
  80
  81         errno = 0;
  82
  83         ATF_REQUIRE(getrusage(RUSAGE_SELF, (void *)0) != 0);
  84         ATF_REQUIRE(errno == EFAULT);
  85 }
  86
  87 ATF_TC(getrusage_sig);
  88 ATF_TC_HEAD(getrusage_sig, tc)
  89 {
  90         atf_tc_set_md_var(tc, "descr", "Test signal count with getrusage(2)");
  91 }
  92
  93 ATF_TC_BODY(getrusage_sig, tc)
  94 {
  95         struct rusage ru;
  96         const long n = 5;
  97         int i;
  98
  99         /*
 100          * Test that signals are recorded.
 101          */
 102         ATF_REQUIRE(signal(SIGUSR1, sighandler) != SIG_ERR);
 103
 104         for (i = 0; i < n; i++)
 105                 ATF_REQUIRE(raise(SIGUSR1) == 0);
 106
 107         (void)memset(&ru, 0, sizeof(struct rusage));
 108         ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
 109
 110         if (n != ru.ru_nsignals)
 111                 atf_tc_fail("getrusage(2) did not record signals");
 112 }
 113
 114 ATF_TC(getrusage_utime_back);
 115 ATF_TC_HEAD(getrusage_utime_back, tc)
 116 {
 117         atf_tc_set_md_var(tc, "descr", "Test bogus values from getrusage(2)");
 118 }
 119
 120 ATF_TC_BODY(getrusage_utime_back, tc)
 121 {
 122         struct rusage ru1, ru2;
 123         size_t i;
 124
 125         /*
 126          * Test that two consecutive calls are sane.
 127          */
 128         atf_tc_expect_fail("PR kern/30115");
 129
 130         for (i = 0; i < maxiter; i++) {
 131
 132                 (void)memset(&ru1, 0, sizeof(struct rusage));
 133                 (void)memset(&ru2, 0, sizeof(struct rusage));
 134
 135                 work();
 136
 137                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru1) == 0);
 138
 139                 work();
 140
 141                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru2) == 0);
 142
 143                 if (timercmp(&ru2.ru_utime, &ru1.ru_utime, <) != 0)
 144                         atf_tc_fail("user time went backwards");
 145         }
 146
 147         atf_tc_fail("anticipated error did not occur");
 148 }
 149
 150 ATF_TC(getrusage_utime_zero);
 151 ATF_TC_HEAD(getrusage_utime_zero, tc)
 152 {
 153         atf_tc_set_md_var(tc, "descr", "Test zero utime from getrusage(2)");
 154 }
 155
 156 ATF_TC_BODY(getrusage_utime_zero, tc)
 157 {
 158         struct rusage ru;
 159         size_t i;
 160
 161         /*
 162          * Test that getrusage(2) does not return
 163          * zero user time for the calling process.
 164          *
 165          * See also (duplicate) PR port-amd64/41734.
 166          */
 167         atf_tc_expect_fail("PR kern/30115");
 168
 169         for (i = 0; i < maxiter; i++) {
 170
 171                 work();
 172
 173                 (void)memset(&ru, 0, sizeof(struct rusage));
 174
 175                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
 176
 177                 if (ru.ru_utime.tv_sec == 0 && ru.ru_utime.tv_usec == 0)
 178                         atf_tc_fail("zero user time from getrusage(2)");
 179         }
 180
 181         atf_tc_fail("anticipated error did not occur");
 182 }
 183
 184 ATF_TP_ADD_TCS(tp)
 185 {
 186
 187         ATF_TP_ADD_TC(tp, getrusage_err);
 188         ATF_TP_ADD_TC(tp, getrusage_sig);
 189         ATF_TP_ADD_TC(tp, getrusage_utime_back);
 190         ATF_TP_ADD_TC(tp, getrusage_utime_zero);
 191
 192         return atf_no_error();
 193 }