string/test-string.h

   1 /* Test and measure string and memory functions.
   2    Copyright (C) 1999, 2002, 2004, 2008, 2011 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <sys/cdefs.h>
  21
  22 typedef struct
  23 {
  24   const char *name;
  25   void (*fn) (void);
  26   long test;
  27 } impl_t;
  28 extern impl_t __start_impls[], __stop_impls[];
  29
  30 #define IMPL(name, test) \
  31   impl_t tst_ ## name                                                   \
  32   __attribute__ ((section ("impls"), aligned (sizeof (void *))))        \
  33        = { __STRING (name), (void (*) (void))name, test };
  34
  35 #ifdef TEST_MAIN
  36
  37 #ifndef _GNU_SOURCE
  38 #define _GNU_SOURCE
  39 #endif
  40
  41 #undef __USE_STRING_INLINES
  42
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <sys/mman.h>
  47 #include <unistd.h>
  48 #include <fcntl.h>
  49 #include <error.h>
  50 #include <errno.h>
  51 #include <time.h>
  52 #define GL(x) _##x
  53 #define GLRO(x) _##x
  54 #include <hp-timing.h>
  55
  56
  57 # define TEST_FUNCTION test_main ()
  58 # define TIMEOUT (4 * 60)
  59 # define OPT_ITERATIONS 10000
  60 # define OPT_RANDOM 10001
  61 # define OPT_SEED 10002
  62
  63 unsigned char *buf1, *buf2;
  64 int ret, do_srandom;
  65 unsigned int seed;
  66 size_t page_size;
  67
  68 hp_timing_t _dl_hp_timing_overhead;
  69
  70 # ifndef ITERATIONS
  71 size_t iterations = 100000;
  72 #  define ITERATIONS_OPTIONS \
  73   { "iterations", required_argument, NULL, OPT_ITERATIONS },
  74 #  define ITERATIONS_PROCESS \
  75   case OPT_ITERATIONS:                          \
  76     iterations = strtoul (optarg, NULL, 0);     \
  77     break;
  78 #  define ITERATIONS iterations
  79 # else
  80 #  define ITERATIONS_OPTIONS
  81 #  define ITERATIONS_PROCESS
  82 # endif
  83
  84 # define CMDLINE_OPTIONS ITERATIONS_OPTIONS \
  85   { "random", no_argument, NULL, OPT_RANDOM },  \
  86   { "seed", required_argument, NULL, OPT_SEED },
  87 # define CMDLINE_PROCESS ITERATIONS_PROCESS \
  88   case OPT_RANDOM:                                                      \
  89     {                                                                   \
  90       int fdr = open ("/dev/urandom", O_RDONLY);                        \
  91                                                                         \
  92       if (fdr < 0 || read (fdr, &seed, sizeof(seed)) != sizeof (seed))  \
  93         seed = time (NULL);                                             \
  94       if (fdr >= 0)                                                     \
  95         close (fdr);                                                    \
  96       do_srandom = 1;                                                   \
  97       break;                                                            \
  98     }                                                                   \
  99                                                                         \
 100   case OPT_SEED:                                                        \
 101     seed = strtoul (optarg, NULL, 0);                                   \
 102     do_srandom = 1;                                                     \
 103     break;
 104
 105 #define CALL(impl, ...) \
 106   (* (proto_t) (impl)->fn) (__VA_ARGS__)
 107
 108 #define FOR_EACH_IMPL(impl, notall) \
 109   for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)       \
 110     if (!notall || impl->test)
 111
 112 #define HP_TIMING_BEST(best_time, start, end)   \
 113   do                                                                    \
 114     {                                                                   \
 115       hp_timing_t tmptime;                                              \
 116       HP_TIMING_DIFF (tmptime, start + _dl_hp_timing_overhead, end);    \
 117       if (best_time > tmptime)                                          \
 118         best_time = tmptime;                                            \
 119     }                                                                   \
 120   while (0)
 121
 122 #ifndef BUF1PAGES
 123 # define BUF1PAGES 1
 124 #endif
 125
 126 static void
 127 test_init (void)
 128 {
 129   page_size = 2 * getpagesize ();
 130 #ifdef MIN_PAGE_SIZE
 131   if (page_size < MIN_PAGE_SIZE)
 132     page_size = MIN_PAGE_SIZE;
 133 #endif
 134   buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE,
 135                MAP_PRIVATE | MAP_ANON, -1, 0);
 136   if (buf1 == MAP_FAILED)
 137     error (EXIT_FAILURE, errno, "mmap failed");
 138   if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE))
 139     error (EXIT_FAILURE, errno, "mprotect failed");
 140   buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 141                MAP_PRIVATE | MAP_ANON, -1, 0);
 142   if (buf2 == MAP_FAILED)
 143     error (EXIT_FAILURE, errno, "mmap failed");
 144   if (mprotect (buf2 + page_size, page_size, PROT_NONE))
 145     error (EXIT_FAILURE, errno, "mprotect failed");
 146   HP_TIMING_DIFF_INIT ();
 147   if (do_srandom)
 148     {
 149       printf ("Setting seed to 0x%x\n", seed);
 150       srandom (seed);
 151     }
 152
 153   memset (buf1, 0xa5, BUF1PAGES * page_size);
 154   memset (buf2, 0x5a, page_size);
 155 }
 156
 157 #endif