string/test-memmove.c

   1 /* Test and measure memmove functions.
   2    Copyright (C) 1999-2015 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 #define TEST_MAIN
  21 #ifdef TEST_BCOPY
  22 # define TEST_NAME "bcopy"
  23 #else
  24 # define TEST_NAME "memmove"
  25 #endif
  26 #include "test-string.h"
  27
  28 char *simple_memmove (char *, const char *, size_t);
  29
  30 #ifdef TEST_BCOPY
  31 typedef void (*proto_t) (const char *, char *, size_t);
  32 void simple_bcopy (const char *, char *, size_t);
  33
  34 IMPL (simple_bcopy, 0)
  35 IMPL (bcopy, 1)
  36
  37 void
  38 simple_bcopy (const char *src, char *dst, size_t n)
  39 {
  40   simple_memmove (dst, src, n);
  41 }
  42 #else
  43 typedef char *(*proto_t) (char *, const char *, size_t);
  44
  45 IMPL (simple_memmove, 0)
  46 IMPL (memmove, 1)
  47 #endif
  48
  49 char *
  50 inhibit_loop_to_libcall
  51 simple_memmove (char *dst, const char *src, size_t n)
  52 {
  53   char *ret = dst;
  54   if (src < dst)
  55     {
  56       dst += n;
  57       src += n;
  58       while (n--)
  59         *--dst = *--src;
  60     }
  61   else
  62     while (n--)
  63       *dst++ = *src++;
  64   return ret;
  65 }
  66
  67 static void
  68 do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
  69              size_t len)
  70 {
  71   memcpy (src, orig_src, len);
  72 #ifdef TEST_BCOPY
  73   CALL (impl, src, dst, len);
  74 #else
  75   char *res;
  76
  77   res = CALL (impl, dst, src, len);
  78   if (res != dst)
  79     {
  80       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  81              res, dst);
  82       ret = 1;
  83       return;
  84     }
  85 #endif
  86
  87   if (memcmp (dst, orig_src, len) != 0)
  88     {
  89       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  90              impl->name, dst, src);
  91       ret = 1;
  92       return;
  93     }
  94 }
  95
  96 static void
  97 do_test (size_t align1, size_t align2, size_t len)
  98 {
  99   size_t i, j;
 100   char *s1, *s2;
 101
 102   align1 &= 63;
 103   if (align1 + len >= page_size)
 104     return;
 105
 106   align2 &= 63;
 107   if (align2 + len >= page_size)
 108     return;
 109
 110   s1 = (char *) (buf1 + align1);
 111   s2 = (char *) (buf2 + align2);
 112
 113   for (i = 0, j = 1; i < len; i++, j += 23)
 114     s1[i] = j;
 115
 116   FOR_EACH_IMPL (impl, 0)
 117     do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
 118 }
 119
 120 static void
 121 do_random_tests (void)
 122 {
 123   size_t i, n, align1, align2, len, size;
 124   size_t srcstart, srcend, dststart, dstend;
 125   int c;
 126   unsigned char *p1, *p2;
 127 #ifndef TEST_BCOPY
 128   unsigned char *res;
 129 #endif
 130
 131   for (n = 0; n < ITERATIONS; n++)
 132     {
 133       if ((random () & 255) == 0)
 134         size = 65536;
 135       else
 136         size = 512;
 137       if (size > page_size)
 138         size = page_size;
 139       if ((random () & 3) == 0)
 140         {
 141           len = random () & (size - 1);
 142           align1 = size - len - (random () & 31);
 143           align2 = size - len - (random () & 31);
 144           if (align1 > size)
 145             align1 = 0;
 146           if (align2 > size)
 147             align2 = 0;
 148         }
 149       else
 150         {
 151           align1 = random () & (size / 2 - 1);
 152           align2 = random () & (size / 2 - 1);
 153           len = random () & (size - 1);
 154           if (align1 + len > size)
 155             align1 = size - len;
 156           if (align2 + len > size)
 157             align2 = size - len;
 158         }
 159
 160       p1 = buf1 + page_size - size;
 161       p2 = buf2 + page_size - size;
 162       c = random () & 255;
 163       srcend = align1 + len + 256;
 164       if (srcend > size)
 165         srcend = size;
 166       if (align1 > 256)
 167         srcstart = align1 - 256;
 168       else
 169         srcstart = 0;
 170       for (i = srcstart; i < srcend; ++i)
 171         p1[i] = random () & 255;
 172       dstend = align2 + len + 256;
 173       if (dstend > size)
 174         dstend = size;
 175       if (align2 > 256)
 176         dststart = align2 - 256;
 177       else
 178         dststart = 0;
 179
 180       FOR_EACH_IMPL (impl, 1)
 181         {
 182           memset (p2 + dststart, c, dstend - dststart);
 183           memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
 184 #ifdef TEST_BCOPY
 185           CALL (impl, (char *) (p2 + align1), (char *) (p2 + align2), len);
 186 #else
 187           res = (unsigned char *) CALL (impl,
 188                                         (char *) (p2 + align2),
 189                                         (char *) (p2 + align1), len);
 190           if (res != p2 + align2)
 191             {
 192               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 193                      n, impl->name, align1, align2, len, res, p2 + align2);
 194               ret = 1;
 195             }
 196 #endif
 197           if (memcmp (p1 + align1, p2 + align2, len))
 198             {
 199               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 200                      n, impl->name, align1, align2, len);
 201               ret = 1;
 202             }
 203           for (i = dststart; i < dstend; ++i)
 204             {
 205               if (i >= align2 && i < align2 + len)
 206                 {
 207                   i = align2 + len - 1;
 208                   continue;
 209                 }
 210               if (i >= srcstart && i < srcend)
 211                 {
 212                   i = srcend - 1;
 213                   continue;
 214                 }
 215               if (p2[i] != c)
 216                 {
 217                   error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
 218                          n, impl->name, align1, align2, len);
 219                   ret = 1;
 220                   break;
 221                 }
 222             }
 223
 224           if (srcstart < align2
 225               && memcmp (p2 + srcstart, p1 + srcstart,
 226                          (srcend > align2 ? align2 : srcend) - srcstart))
 227             {
 228               error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
 229                      n, impl->name, align1, align2, len);
 230               ret = 1;
 231               break;
 232             }
 233
 234           i = srcstart > align2 + len ? srcstart : align2 + len;
 235           if (srcend > align2 + len
 236               && memcmp (p2 + i, p1 + i, srcend - i))
 237             {
 238               error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
 239                      n, impl->name, align1, align2, len);
 240               ret = 1;
 241               break;
 242             }
 243         }
 244     }
 245 }
 246
 247 int
 248 test_main (void)
 249 {
 250   size_t i;
 251
 252   test_init ();
 253
 254   printf ("%23s", "");
 255   FOR_EACH_IMPL (impl, 0)
 256     printf ("\t%s", impl->name);
 257   putchar ('\n');
 258
 259   for (i = 0; i < 14; ++i)
 260     {
 261       do_test (0, 32, 1 << i);
 262       do_test (32, 0, 1 << i);
 263       do_test (0, i, 1 << i);
 264       do_test (i, 0, 1 << i);
 265     }
 266
 267   for (i = 0; i < 32; ++i)
 268     {
 269       do_test (0, 32, i);
 270       do_test (32, 0, i);
 271       do_test (0, i, i);
 272       do_test (i, 0, i);
 273     }
 274
 275   for (i = 3; i < 32; ++i)
 276     {
 277       if ((i & (i - 1)) == 0)
 278         continue;
 279       do_test (0, 32, 16 * i);
 280       do_test (32, 0, 16 * i);
 281       do_test (0, i, 16 * i);
 282       do_test (i, 0, 16 * i);
 283     }
 284
 285   do_random_tests ();
 286   return ret;
 287 }
 288
 289 #include "../test-skeleton.c"