string/test-string.h

   1 /* Test and measure string and memory functions.
   2    Copyright (C) 1999-2017 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 <getopt.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <sys/mman.h>
  48 #include <sys/param.h>
  49 #include <unistd.h>
  50 #include <fcntl.h>
  51 #include <error.h>
  52 #include <errno.h>
  53 #include <time.h>
  54 #include <ifunc-impl-list.h>
  55 #define GL(x) _##x
  56 #define GLRO(x) _##x
  57
  58
  59 # define TEST_FUNCTION test_main
  60 # define TIMEOUT (4 * 60)
  61 # define OPT_ITERATIONS 10000
  62 # define OPT_RANDOM 10001
  63 # define OPT_SEED 10002
  64
  65 unsigned char *buf1, *buf2;
  66 int ret, do_srandom;
  67 unsigned int seed;
  68 size_t page_size;
  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
  88 static void __attribute__ ((used))
  89 cmdline_process_function (int c)
  90 {
  91   switch (c)
  92     {
  93       ITERATIONS_PROCESS
  94       case OPT_RANDOM:
  95         {
  96           int fdr = open ("/dev/urandom", O_RDONLY);
  97           if (fdr < 0 || read (fdr, &seed, sizeof (seed)) != sizeof (seed))
  98             seed = time (NULL);
  99           if (fdr >= 0)
 100             close (fdr);
 101           do_srandom = 1;
 102           break;
 103         }
 104
 105       case OPT_SEED:
 106         seed = strtoul (optarg, NULL, 0);
 107         do_srandom = 1;
 108         break;
 109     }
 110 }
 111 # define CMDLINE_PROCESS cmdline_process_function
 112
 113 #define CALL(impl, ...) \
 114   (* (proto_t) (impl)->fn) (__VA_ARGS__)
 115
 116 #ifdef TEST_NAME
 117 /* Increase size of FUNC_LIST if assert is triggered at run-time.  */
 118 static struct libc_ifunc_impl func_list[32];
 119 static int func_count;
 120 static int impl_count = -1;
 121 static impl_t *impl_array;
 122
 123 # define FOR_EACH_IMPL(impl, notall) \
 124   impl_t *impl;                                                         \
 125   int count;                                                            \
 126   if (impl_count == -1)                                                 \
 127     {                                                                   \
 128       impl_count = 0;                                                   \
 129       if (func_count != 0)                                              \
 130         {                                                               \
 131           int f;                                                        \
 132           impl_t *skip = NULL, *a;                                      \
 133           for (impl = __start_impls; impl < __stop_impls; ++impl)       \
 134             if (strcmp (impl->name, TEST_NAME) == 0)                    \
 135               skip = impl;                                              \
 136             else                                                        \
 137               impl_count++;                                             \
 138           a = impl_array = malloc ((impl_count + func_count) *          \
 139                                    sizeof (impl_t));                    \
 140           for (impl = __start_impls; impl < __stop_impls; ++impl)       \
 141             if (impl != skip)                                           \
 142               *a++ = *impl;                                             \
 143           for (f = 0; f < func_count; f++)                              \
 144             if (func_list[f].usable)                                    \
 145               {                                                         \
 146                 a->name = func_list[f].name;                            \
 147                 a->fn = func_list[f].fn;                                \
 148                 a->test = 1;                                            \
 149                 a++;                                                    \
 150               }                                                         \
 151           impl_count = a - impl_array;                                  \
 152         }                                                               \
 153       else                                                              \
 154         {                                                               \
 155           impl_count = __stop_impls - __start_impls;                    \
 156           impl_array = __start_impls;                                   \
 157         }                                                               \
 158     }                                                                   \
 159   impl = impl_array;                                                    \
 160   for (count = 0; count < impl_count; ++count, ++impl)                  \
 161     if (!notall || impl->test)
 162 #else
 163 # define FOR_EACH_IMPL(impl, notall) \
 164   for (impl_t *impl = __start_impls; impl < __stop_impls; ++impl)       \
 165     if (!notall || impl->test)
 166 #endif
 167
 168 #ifndef BUF1PAGES
 169 # define BUF1PAGES 1
 170 #endif
 171
 172 static void
 173 test_init (void)
 174 {
 175 #ifdef TEST_NAME
 176   func_count = __libc_ifunc_impl_list (TEST_NAME, func_list,
 177                                        (sizeof func_list
 178                                         / sizeof func_list[0]));
 179 #endif
 180
 181   page_size = 2 * getpagesize ();
 182 #ifdef MIN_PAGE_SIZE
 183   if (page_size < MIN_PAGE_SIZE)
 184     page_size = MIN_PAGE_SIZE;
 185 #endif
 186   buf1 = mmap (0, (BUF1PAGES + 1) * page_size, PROT_READ | PROT_WRITE,
 187                MAP_PRIVATE | MAP_ANON, -1, 0);
 188   if (buf1 == MAP_FAILED)
 189     error (EXIT_FAILURE, errno, "mmap failed");
 190   if (mprotect (buf1 + BUF1PAGES * page_size, page_size, PROT_NONE))
 191     error (EXIT_FAILURE, errno, "mprotect failed");
 192   buf2 = mmap (0, 2 * page_size, PROT_READ | PROT_WRITE,
 193                MAP_PRIVATE | MAP_ANON, -1, 0);
 194   if (buf2 == MAP_FAILED)
 195     error (EXIT_FAILURE, errno, "mmap failed");
 196   if (mprotect (buf2 + page_size, page_size, PROT_NONE))
 197     error (EXIT_FAILURE, errno, "mprotect failed");
 198   if (do_srandom)
 199     {
 200       printf ("Setting seed to 0x%x\n", seed);
 201       srandom (seed);
 202     }
 203
 204   memset (buf1, 0xa5, BUF1PAGES * page_size);
 205   memset (buf2, 0x5a, page_size);
 206 }
 207
 208 #endif