string/test-string.h

   1 /* Test and measure string and memory functions.
   2    Copyright (C) 1999, 2002 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 typedef struct
  22 {
  23   const char *name;
  24   void (*fn) (void);
  25   long test;
  26 } impl_t;
  27 extern impl_t __start_impls[], __stop_impls[];
  28
  29 #define IMPL(name, test) \
  30   impl_t tst_ ## name                                                   \
  31   __attribute__ ((section ("impls"), aligned (sizeof (void *))))        \
  32     = { #name, (void (*) (void))name, test };
  33
  34 #ifdef TEST_MAIN
  35
  36 #ifndef _GNU_SOURCE
  37 #define _GNU_SOURCE
  38 #endif
  39
  40 #undef __USE_STRING_INLINES
  41
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <sys/mman.h>
  46 #include <unistd.h>
  47 #include <fcntl.h>
  48 #include <error.h>
  49 #include <errno.h>
  50 #include <time.h>
  51 #define GL(x) _##x
  52 #include <hp-timing.h>
  53
  54
  55 # define TEST_FUNCTION test_main ()
  56 # define TIMEOUT (4 * 60)
  57 # define OPT_ITERATIONS 10000
  58 # define OPT_RANDOM 10001
  59 # define OPT_SEED 10002
  60
  61 unsigned char *buf1, *buf2;
  62 int ret, do_srandom;
  63 unsigned int seed;
  64 size_t page_size;
  65
  66 hp_timing_t _dl_hp_timing_overhead;
  67
  68 # ifndef ITERATIONS
  69 size_t iterations = 100000;
  70 #  define ITERATIONS_OPTIONS \
  71   { "iterations", required_argument, NULL, OPT_ITERATIONS },
  72 #  define ITERATIONS_PROCESS \
  73   case OPT_ITERATIONS:                          \
  74     iterations = strtoul (optarg, NULL, 0);     \
  75     break;
  76 #  define ITERATIONS iterations
  77 # else
  78 #  define ITERATIONS_OPTIONS
  79 #  define ITERATIONS_PROCESS
  80 # endif
  81
  82 # define CMDLINE_OPTIONS ITERATIONS_OPTIONS \
  83   { "random", no_argument, NULL, OPT_RANDOM },  \
  84   { "seed", required_argument, NULL, OPT_SEED },
  85 # define CMDLINE_PROCESS ITERATIONS_PROCESS \
  86   case OPT_RANDOM:                                                      \
  87     {                                                                   \
  88       int fdr = open ("/dev/urandom", O_RDONLY);                        \
  89                                                                         \
  90       if (fdr < 0 || read (fdr, &seed, sizeof(seed)) != sizeof (seed))  \
  91         seed = time (NULL);                                             \
  92       if (fdr >= 0)                                                     \
  93         close (fdr);                                                    \
  94       do_srandom = 1;                                                   \
  95       break;                                                            \
  96     }                                                                   \
  97                                                                         \
  98   case OPT_SEED:                                                        \
  99     seed = strtoul (optarg, NULL, 0);                                   \
 100     do_srandom = 1;                                                     \
 101     break;
 102
 103 #define CALL(impl, ...) \
 104   (* (proto_t) (impl)->fn) (__VA_ARGS__)
 105
 106 #define FOR_EACH_IMPL(impl, notall) \
 107   for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)       \
 108     if (!notall || impl->test)
 109
 110 #define HP_TIMING_BEST(best_time, start, end)   \
 111   do                                                                    \
 112     {                                                                   \
 113       hp_timing_t tmptime;                                              \
 114       HP_TIMING_DIFF (tmptime, start + _dl_hp_timing_overhead, end);    \
 115       if (best_time > tmptime)                                          \
 116         best_time = tmptime;                                            \
 117     }                                                                   \
 118   while (0)
 119
 120 static void
 121 test_init (void)
 122 {
 123   page_size = 2 * getpagesize ();
 124 #ifdef MIN_PAGE_SIZE
 125   if (page_size < MIN_PAGE_SIZE)
 126     page_size = MIN_PAGE_SIZE;
 127 #endif
 128   buf1 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 129                MAP_PRIVATE | MAP_ANON, -1, 0);
 130   if (buf1 == MAP_FAILED)
 131     error (EXIT_FAILURE, errno, "mmap failed");
 132   if (mprotect (buf1 + page_size, page_size, PROT_NONE))
 133     error (EXIT_FAILURE, errno, "mprotect failed");
 134   buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 135                MAP_PRIVATE | MAP_ANON, -1, 0);
 136   if (buf2 == MAP_FAILED)
 137     error (EXIT_FAILURE, errno, "mmap failed");
 138   if (mprotect (buf2 + page_size, page_size, PROT_NONE))
 139     error (EXIT_FAILURE, errno, "mprotect failed");
 140   HP_TIMING_DIFF_INIT ();
 141   if (do_srandom)
 142     {
 143       printf ("Setting seed to 0x%x\n", seed);
 144       srandom (seed);
 145     }
 146
 147   memset (buf1, 0xa5, page_size);
 148   memset (buf2, 0x5a, page_size);
 149 }
 150
 151 #endif