string/test-memmove.c

   1 /* Test and measure memmove functions.
   2    Copyright (C) 1999, 2002, 2003 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 #include "test-string.h"
  22
  23 typedef char *(*proto_t) (char *, const char *, size_t);
  24 char *simple_memmove (char *, const char *, size_t);
  25
  26 IMPL (simple_memmove, 0)
  27 IMPL (memmove, 1)
  28
  29 char *
  30 simple_memmove (char *dst, const char *src, size_t n)
  31 {
  32   char *ret = dst;
  33   if (src < dst)
  34     {
  35       dst += n;
  36       src += n;
  37       while (n--)
  38         *--dst = *--src;
  39     }
  40   else
  41     while (n--)
  42       *dst++ = *src++;
  43   return ret;
  44 }
  45
  46 static void
  47 do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
  48              size_t len)
  49 {
  50   char *res;
  51
  52   memcpy (src, orig_src, len);
  53   res = CALL (impl, dst, src, len);
  54   if (res != dst)
  55     {
  56       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  57              res, dst);
  58       ret = 1;
  59       return;
  60     }
  61
  62   if (memcmp (dst, orig_src, len) != 0)
  63     {
  64       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  65              impl->name, dst, src);
  66       ret = 1;
  67       return;
  68     }
  69
  70   if (HP_TIMING_AVAIL)
  71     {
  72       hp_timing_t start __attribute ((unused));
  73       hp_timing_t stop __attribute ((unused));
  74       hp_timing_t best_time = ~ (hp_timing_t) 0;
  75       size_t i;
  76
  77       for (i = 0; i < 32; ++i)
  78         {
  79           HP_TIMING_NOW (start);
  80           CALL (impl, dst, src, len);
  81           HP_TIMING_NOW (stop);
  82           HP_TIMING_BEST (best_time, start, stop);
  83         }
  84
  85       printf ("\t%zd", (size_t) best_time);
  86     }
  87 }
  88
  89 static void
  90 do_test (size_t align1, size_t align2, size_t len)
  91 {
  92   size_t i, j;
  93   char *s1, *s2;
  94
  95   align1 &= 63;
  96   if (align1 + len >= page_size)
  97     return;
  98
  99   align2 &= 63;
 100   if (align2 + len >= page_size)
 101     return;
 102
 103   s1 = (char *) (buf1 + align1);
 104   s2 = (char *) (buf2 + align2);
 105
 106   for (i = 0, j = 1; i < len; i++, j += 23)
 107     s1[i] = j;
 108
 109   if (HP_TIMING_AVAIL)
 110     printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
 111
 112   FOR_EACH_IMPL (impl, 0)
 113     do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
 114
 115   if (HP_TIMING_AVAIL)
 116     putchar ('\n');
 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   unsigned char *res;
 127
 128   for (n = 0; n < ITERATIONS; n++)
 129     {
 130       if ((random () & 255) == 0)
 131         size = 65536;
 132       else
 133         size = 512;
 134       if (size > page_size)
 135         size = page_size;
 136       if ((random () & 3) == 0)
 137         {
 138           len = random () & (size - 1);
 139           align1 = size - len - (random () & 31);
 140           align2 = size - len - (random () & 31);
 141           if (align1 > size)
 142             align1 = 0;
 143           if (align2 > size)
 144             align2 = 0;
 145         }
 146       else
 147         {
 148           align1 = random () & (size / 2 - 1);
 149           align2 = random () & (size / 2 - 1);
 150           len = random () & (size - 1);
 151           if (align1 + len > size)
 152             align1 = size - len;
 153           if (align2 + len > size)
 154             align2 = size - len;
 155         }
 156
 157       p1 = buf1 + page_size - size;
 158       p2 = buf2 + page_size - size;
 159       c = random () & 255;
 160       srcend = align1 + len + 256;
 161       if (srcend > size)
 162         srcend = size;
 163       if (align1 > 256)
 164         srcstart = align1 - 256;
 165       else
 166         srcstart = 0;
 167       for (i = srcstart; i < srcend; ++i)
 168         p1[i] = random () & 255;
 169       dstend = align2 + len + 256;
 170       if (dstend > size)
 171         dstend = size;
 172       if (align2 > 256)
 173         dststart = align2 - 256;
 174       else
 175         dststart = 0;
 176
 177       FOR_EACH_IMPL (impl, 1)
 178         {
 179           memset (p2 + dststart, c, dstend - dststart);
 180           memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
 181           res = (unsigned char *) CALL (impl,
 182                                         (char *) (p2 + align2),
 183                                         (char *) (p2 + align1), len);
 184           if (res != p2 + align2)
 185             {
 186               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 187                      n, impl->name, align1, align2, len, res, p2 + align2);
 188               ret = 1;
 189             }
 190           if (memcmp (p1 + align1, p2 + align2, len))
 191             {
 192               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 193                      n, impl->name, align1, align2, len);
 194               ret = 1;
 195             }
 196           for (i = dststart; i < dstend; ++i)
 197             {
 198               if (i >= align2 && i < align2 + len)
 199                 {
 200                   i = align2 + len - 1;
 201                   continue;
 202                 }
 203               if (i >= srcstart && i < srcend)
 204                 {
 205                   i = srcend - 1;
 206                   continue;
 207                 }
 208               if (p2[i] != c)
 209                 {
 210                   error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
 211                          n, impl->name, align1, align2, len);
 212                   ret = 1;
 213                   break;
 214                 }
 215             }
 216
 217           if (srcstart < align2
 218               && memcmp (p2 + srcstart, p1 + srcstart,
 219                          (srcend > align2 ? align2 : srcend) - srcstart))
 220             {
 221               error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
 222                      n, impl->name, align1, align2, len);
 223               ret = 1;
 224               break;
 225             }
 226
 227           i = srcstart > align2 + len ? srcstart : align2 + len;
 228           if (srcend > align2 + len
 229               && memcmp (p2 + i, p1 + i, srcend - i))
 230             {
 231               error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
 232                      n, impl->name, align1, align2, len);
 233               ret = 1;
 234               break;
 235             }
 236         }
 237     }
 238 }
 239
 240 int
 241 test_main (void)
 242 {
 243   size_t i;
 244
 245   test_init ();
 246
 247   printf ("%23s", "");
 248   FOR_EACH_IMPL (impl, 0)
 249     printf ("\t%s", impl->name);
 250   putchar ('\n');
 251
 252   for (i = 0; i < 14; ++i)
 253     {
 254       do_test (0, 32, 1 << i);
 255       do_test (32, 0, 1 << i);
 256       do_test (0, i, 1 << i);
 257       do_test (i, 0, 1 << i);
 258     }
 259
 260   for (i = 0; i < 32; ++i)
 261     {
 262       do_test (0, 32, i);
 263       do_test (32, 0, i);
 264       do_test (0, i, i);
 265       do_test (i, 0, i);
 266     }
 267
 268   for (i = 3; i < 32; ++i)
 269     {
 270       if ((i & (i - 1)) == 0)
 271         continue;
 272       do_test (0, 32, 16 * i);
 273       do_test (32, 0, 16 * i);
 274       do_test (0, i, 16 * i);
 275       do_test (i, 0, 16 * i);
 276     }
 277
 278   do_random_tests ();
 279   return ret;
 280 }
 281
 282 #include "../test-skeleton.c"