string/test-memmove.c

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