tests/lib/libc/sys/t_getrusage.c

   1 /* $NetBSD: t_getrusage.c,v 1.3 2014/09/03 19:24:12 matt 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 1.3 2014/09/03 19:24:12 matt 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 #ifdef __or1k__
  62                  asm volatile("l.nop"); /* Do something. */
  63 #else
  64                  asm volatile("nop");   /* Do something. */
  65 #endif
  66                  n--;
  67         }
  68 }
  69
  70 ATF_TC(getrusage_err);
  71 ATF_TC_HEAD(getrusage_err, tc)
  72 {
  73         atf_tc_set_md_var(tc, "descr", "Test error conditions");
  74 }
  75
  76 ATF_TC_BODY(getrusage_err, tc)
  77 {
  78         struct rusage ru;
  79
  80         errno = 0;
  81
  82         ATF_REQUIRE(getrusage(INT_MAX, &ru) != 0);
  83         ATF_REQUIRE(errno == EINVAL);
  84
  85         errno = 0;
  86
  87         ATF_REQUIRE(getrusage(RUSAGE_SELF, (void *)0) != 0);
  88         ATF_REQUIRE(errno == EFAULT);
  89 }
  90
  91 ATF_TC(getrusage_sig);
  92 ATF_TC_HEAD(getrusage_sig, tc)
  93 {
  94         atf_tc_set_md_var(tc, "descr", "Test signal count with getrusage(2)");
  95 }
  96
  97 ATF_TC_BODY(getrusage_sig, tc)
  98 {
  99         struct rusage ru;
 100         const long n = 5;
 101         int i;
 102
 103         /*
 104          * Test that signals are recorded.
 105          */
 106         ATF_REQUIRE(signal(SIGUSR1, sighandler) != SIG_ERR);
 107
 108         for (i = 0; i < n; i++)
 109                 ATF_REQUIRE(raise(SIGUSR1) == 0);
 110
 111         (void)memset(&ru, 0, sizeof(struct rusage));
 112         ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
 113
 114         if (n != ru.ru_nsignals)
 115                 atf_tc_fail("getrusage(2) did not record signals");
 116 }
 117
 118 ATF_TC(getrusage_utime_back);
 119 ATF_TC_HEAD(getrusage_utime_back, tc)
 120 {
 121         atf_tc_set_md_var(tc, "descr", "Test bogus values from getrusage(2)");
 122 }
 123
 124 ATF_TC_BODY(getrusage_utime_back, tc)
 125 {
 126         struct rusage ru1, ru2;
 127         size_t i;
 128
 129         /*
 130          * Test that two consecutive calls are sane.
 131          */
 132         atf_tc_expect_fail("PR kern/30115");
 133
 134         for (i = 0; i < maxiter; i++) {
 135
 136                 (void)memset(&ru1, 0, sizeof(struct rusage));
 137                 (void)memset(&ru2, 0, sizeof(struct rusage));
 138
 139                 work();
 140
 141                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru1) == 0);
 142
 143                 work();
 144
 145                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru2) == 0);
 146
 147                 if (timercmp(&ru2.ru_utime, &ru1.ru_utime, <) != 0)
 148                         atf_tc_fail("user time went backwards");
 149         }
 150
 151         atf_tc_fail("anticipated error did not occur");
 152 }
 153
 154 ATF_TC(getrusage_utime_zero);
 155 ATF_TC_HEAD(getrusage_utime_zero, tc)
 156 {
 157         atf_tc_set_md_var(tc, "descr", "Test zero utime from getrusage(2)");
 158 }
 159
 160 ATF_TC_BODY(getrusage_utime_zero, tc)
 161 {
 162         struct rusage ru;
 163         size_t i;
 164
 165         /*
 166          * Test that getrusage(2) does not return
 167          * zero user time for the calling process.
 168          *
 169          * See also (duplicate) PR port-amd64/41734.
 170          */
 171         atf_tc_expect_fail("PR kern/30115");
 172
 173         for (i = 0; i < maxiter; i++) {
 174
 175                 work();
 176
 177                 (void)memset(&ru, 0, sizeof(struct rusage));
 178
 179                 ATF_REQUIRE(getrusage(RUSAGE_SELF, &ru) == 0);
 180
 181                 if (ru.ru_utime.tv_sec == 0 && ru.ru_utime.tv_usec == 0)
 182                         atf_tc_fail("zero user time from getrusage(2)");
 183         }
 184
 185         atf_tc_fail("anticipated error did not occur");
 186 }
 187
 188 ATF_TP_ADD_TCS(tp)
 189 {
 190
 191         ATF_TP_ADD_TC(tp, getrusage_err);
 192         ATF_TP_ADD_TC(tp, getrusage_sig);
 193         ATF_TP_ADD_TC(tp, getrusage_utime_back);
 194         ATF_TP_ADD_TC(tp, getrusage_utime_zero);
 195
 196         return atf_no_error();
 197 }