string/test-string.h

   1 /* Test and measure string and memory functions.
   2    Copyright (C) 1999-2013 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 <sys/param.h>
  48 #include <unistd.h>
  49 #include <fcntl.h>
  50 #include <error.h>
  51 #include <errno.h>
  52 #include <time.h>
  53 #include <ifunc-impl-list.h>
  54 #define GL(x) _##x
  55 #define GLRO(x) _##x
  56
  57
  58 # define TEST_FUNCTION test_main ()
  59 # define TIMEOUT (4 * 60)
  60 # define OPT_ITERATIONS 10000
  61 # define OPT_RANDOM 10001
  62 # define OPT_SEED 10002
  63
  64 unsigned char *buf1, *buf2;
  65 int ret, do_srandom;
  66 unsigned int seed;
  67 size_t page_size;
  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 #if defined TEST_IFUNC && defined TEST_NAME
 108 /* Increase size of FUNC_LIST if assert is triggered at run-time.  */
 109 static struct libc_ifunc_impl func_list[32];
 110 static int func_count;
 111 static int impl_count = -1;
 112 static impl_t *impl_array;
 113
 114 # define FOR_EACH_IMPL(impl, notall) \
 115   impl_t *impl;                                                         \
 116   int count;                                                            \
 117   if (impl_count == -1)                                                 \
 118     {                                                                   \
 119       impl_count = 0;                                                   \
 120       if (func_count != 0)                                              \
 121         {                                                               \
 122           int f;                                                        \
 123           impl_t *skip = NULL, *a;                                      \
 124           for (impl = __start_impls; impl < __stop_impls; ++impl)       \
 125             if (strcmp (impl->name, TEST_NAME) == 0)                    \
 126               skip = impl;                                              \
 127             else                                                        \
 128               impl_count++;                                             \
 129           a = impl_array = malloc ((impl_count + func_count) *          \
 130                                    sizeof (impl_t));                    \
 131           for (impl = __start_impls; impl < __stop_impls; ++impl)       \
 132             if (impl != skip)                                           \
 133               *a++ = *impl;                                             \
 134           for (f = 0; f < func_count; f++)                              \
 135             if (func_list[f].usable)                                    \
 136               {                                                         \
 137                 a->name = func_list[f].name;                            \
 138                 a->fn = func_list[f].fn;                                \
 139                 a->test = 1;                                            \
 140                 a++;                                                    \
 141               }                                                         \
 142           impl_count = a - impl_array;                                  \
 143         }                                                               \
 144       else                                                              \
 145         {                                                               \
 146           impl_count = __stop_impls - __start_impls;                    \
 147           impl_array = __start_impls;                                   \
 148         }                                                               \
 149     }                                                                   \
 150   impl = impl_array;                                                    \
 151   for (count = 0; count < impl_count; ++count, ++impl)                  \
 152     if (!notall || impl->test)
 153 #else
 154 # define FOR_EACH_IMPL(impl, notall) \
 155   for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)       \
 156     if (!notall || impl->test)
 157 #endif
 158
 159 #ifndef BUF1PAGES
 160 # define BUF1PAGES 1
 161 #endif
 162
 163 static void
 164 test_init (void)
 165 {
 166 #if defined TEST_IFUNC && defined TEST_NAME
 167   func_count = __libc_ifunc_impl_list (TEST_NAME, func_list,
 168                                        (sizeof func_list
 169                                         / sizeof func_list[0]));
 170 #endif
 171
 172   page_size = 2 * getpagesize ();
 173 #ifdef MIN_PAGE_SIZE
 174   if (page_size < MIN_PAGE_SIZE)
 175     page_size = MIN_PAGE_SIZE;
 176 #endif
 177   buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE,
 178                MAP_PRIVATE | MAP_ANON, -1, 0);
 179   if (buf1 == MAP_FAILED)
 180     error (EXIT_FAILURE, errno, "mmap failed");
 181   if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE))
 182     error (EXIT_FAILURE, errno, "mprotect failed");
 183   buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 184                MAP_PRIVATE | MAP_ANON, -1, 0);
 185   if (buf2 == MAP_FAILED)
 186     error (EXIT_FAILURE, errno, "mmap failed");
 187   if (mprotect (buf2 + page_size, page_size, PROT_NONE))
 188     error (EXIT_FAILURE, errno, "mprotect failed");
 189   if (do_srandom)
 190     {
 191       printf ("Setting seed to 0x%x\n", seed);
 192       srandom (seed);
 193     }
 194
 195   memset (buf1, 0xa5, BUF1PAGES * page_size);
 196   memset (buf2, 0x5a, page_size);
 197 }
 198
 199 #endif