string/test-string.h

   1 /* Test and measure string and memory functions.
   2    Copyright (C) 1999, 2002, 2004, 2008 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 #define GLRO(x) _##x
  53 #include <hp-timing.h>
  54
  55
  56 # define TEST_FUNCTION test_main ()
  57 # define TIMEOUT (4 * 60)
  58 # define OPT_ITERATIONS 10000
  59 # define OPT_RANDOM 10001
  60 # define OPT_SEED 10002
  61
  62 unsigned char *buf1, *buf2;
  63 int ret, do_srandom;
  64 unsigned int seed;
  65 size_t page_size;
  66
  67 hp_timing_t _dl_hp_timing_overhead;
  68
  69 # ifndef ITERATIONS
  70 size_t iterations = 100000;
  71 #  define ITERATIONS_OPTIONS \
  72   { "iterations", required_argument, NULL, OPT_ITERATIONS },
  73 #  define ITERATIONS_PROCESS \
  74   case OPT_ITERATIONS:                          \
  75     iterations = strtoul (optarg, NULL, 0);     \
  76     break;
  77 #  define ITERATIONS iterations
  78 # else
  79 #  define ITERATIONS_OPTIONS
  80 #  define ITERATIONS_PROCESS
  81 # endif
  82
  83 # define CMDLINE_OPTIONS ITERATIONS_OPTIONS \
  84   { "random", no_argument, NULL, OPT_RANDOM },  \
  85   { "seed", required_argument, NULL, OPT_SEED },
  86 # define CMDLINE_PROCESS ITERATIONS_PROCESS \
  87   case OPT_RANDOM:                                                      \
  88     {                                                                   \
  89       int fdr = open ("/dev/urandom", O_RDONLY);                        \
  90                                                                         \
  91       if (fdr < 0 || read (fdr, &seed, sizeof(seed)) != sizeof (seed))  \
  92         seed = time (NULL);                                             \
  93       if (fdr >= 0)                                                     \
  94         close (fdr);                                                    \
  95       do_srandom = 1;                                                   \
  96       break;                                                            \
  97     }                                                                   \
  98                                                                         \
  99   case OPT_SEED:                                                        \
 100     seed = strtoul (optarg, NULL, 0);                                   \
 101     do_srandom = 1;                                                     \
 102     break;
 103
 104 #define CALL(impl, ...) \
 105   (* (proto_t) (impl)->fn) (__VA_ARGS__)
 106
 107 #define FOR_EACH_IMPL(impl, notall) \
 108   for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)       \
 109     if (!notall || impl->test)
 110
 111 #define HP_TIMING_BEST(best_time, start, end)   \
 112   do                                                                    \
 113     {                                                                   \
 114       hp_timing_t tmptime;                                              \
 115       HP_TIMING_DIFF (tmptime, start + _dl_hp_timing_overhead, end);    \
 116       if (best_time > tmptime)                                          \
 117         best_time = tmptime;                                            \
 118     }                                                                   \
 119   while (0)
 120
 121 #ifndef BUF1PAGES
 122 # define BUF1PAGES 1
 123 #endif
 124
 125 static void
 126 test_init (void)
 127 {
 128   page_size = 2 * getpagesize ();
 129 #ifdef MIN_PAGE_SIZE
 130   if (page_size < MIN_PAGE_SIZE)
 131     page_size = MIN_PAGE_SIZE;
 132 #endif
 133   buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE,
 134                MAP_PRIVATE | MAP_ANON, -1, 0);
 135   if (buf1 == MAP_FAILED)
 136     error (EXIT_FAILURE, errno, "mmap failed");
 137   if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE))
 138     error (EXIT_FAILURE, errno, "mprotect failed");
 139   buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 140                MAP_PRIVATE | MAP_ANON, -1, 0);
 141   if (buf2 == MAP_FAILED)
 142     error (EXIT_FAILURE, errno, "mmap failed");
 143   if (mprotect (buf2 + page_size, page_size, PROT_NONE))
 144     error (EXIT_FAILURE, errno, "mprotect failed");
 145   HP_TIMING_DIFF_INIT ();
 146   if (do_srandom)
 147     {
 148       printf ("Setting seed to 0x%x\n", seed);
 149       srandom (seed);
 150     }
 151
 152   memset (buf1, 0xa5, BUF1PAGES * page_size);
 153   memset (buf2, 0x5a, page_size);
 154 }
 155
 156 #endif