string/test-strcpy.c

   1 /* Test and measure strcpy functions.
   2    Copyright (C) 1999-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifdef WIDE
  20 # include <wchar.h>
  21 # define CHAR wchar_t
  22 # define UCHAR wchar_t
  23 # define sfmt "ls"
  24 # define BIG_CHAR WCHAR_MAX
  25 # define SMALL_CHAR 1273
  26 # define STRCMP wcscmp
  27 # define MEMCMP wmemcmp
  28 # define MEMSET wmemset
  29 #else
  30 # define CHAR char
  31 # define UCHAR unsigned char
  32 # define sfmt "s"
  33 # define BIG_CHAR CHAR_MAX
  34 # define SMALL_CHAR 127
  35 # define STRCMP strcmp
  36 # define MEMCMP memcmp
  37 # define MEMSET memset
  38 #endif
  39
  40 #ifndef STRCPY_RESULT
  41 # define STRCPY_RESULT(dst, len) dst
  42 # define TEST_MAIN
  43 # ifndef WIDE
  44 #  define TEST_NAME "strcpy"
  45 # else
  46 #  define TEST_NAME "wcscpy"
  47 # endif
  48 # include "test-string.h"
  49 # ifndef WIDE
  50 #  define SIMPLE_STRCPY simple_strcpy
  51 #  define STRCPY strcpy
  52 # else
  53 #  define SIMPLE_STRCPY simple_wcscpy
  54 #  define STRCPY wcscpy
  55 # endif
  56
  57 IMPL (STRCPY, 1)
  58
  59 /* Naive implementation to verify results.  */
  60 CHAR *
  61 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
  62 {
  63   CHAR *ret = dst;
  64   while ((*dst++ = *src++) != '\0');
  65   return ret;
  66 }
  67 #endif
  68
  69 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  70
  71 static void
  72 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  73              size_t len __attribute__((unused)))
  74 {
  75   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  76     {
  77       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  78              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  79       ret = 1;
  80       return;
  81     }
  82
  83   if (STRCMP (dst, src) != 0)
  84     {
  85       error (0, 0,
  86              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  87              impl->name, dst, src);
  88       ret = 1;
  89       return;
  90     }
  91 }
  92
  93 static void
  94 do_test (size_t align1, size_t align2, size_t len, int max_char)
  95 {
  96   size_t i;
  97   CHAR *s1, *s2;
  98 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
  99    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 100    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 101   align1 &= 7;
 102   if ((align1 + len) * sizeof (CHAR) >= page_size)
 103     return;
 104
 105   align2 &= 7;
 106   if ((align2 + len) * sizeof (CHAR) >= page_size)
 107     return;
 108
 109   s1 = (CHAR *) (buf1) + align1;
 110   s2 = (CHAR *) (buf2) + align2;
 111
 112   for (i = 0; i < len; i++)
 113     s1[i] = 32 + 23 * i % (max_char - 32);
 114   s1[len] = 0;
 115
 116   FOR_EACH_IMPL (impl, 0)
 117     do_one_test (impl, s2, s1, len);
 118 }
 119
 120 static void
 121 do_random_tests (void)
 122 {
 123   size_t i, j, n, align1, align2, len;
 124   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 125   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 126   UCHAR *res;
 127
 128   for (n = 0; n < ITERATIONS; n++)
 129     {
 130       /* For wcsrchr: align1 and align2 here mean align not in bytes,
 131          but in wchar_ts, in bytes it will equal to align * (sizeof
 132          (wchar_t)).  For strrchr we need to check all alignments from
 133          0 to 63 since some assembly implementations have separate
 134          prolog for alignments more 48. */
 135
 136       align1 = random () & (63 / sizeof (CHAR));
 137       if (random () & 1)
 138         align2 = random () & (63 / sizeof (CHAR));
 139       else
 140         align2 = align1 + (random () & 24);
 141       len = random () & 511;
 142       j = align1;
 143       if (align2 > j)
 144         j = align2;
 145       if (len + j >= 511)
 146         len = 510 - j - (random () & 7);
 147       j = len + align1 + 64;
 148       if (j > 512)
 149         j = 512;
 150       for (i = 0; i < j; i++)
 151         {
 152           if (i == len + align1)
 153             p1[i] = 0;
 154           else
 155             {
 156               p1[i] = random () & BIG_CHAR;
 157               if (i >= align1 && i < len + align1 && !p1[i])
 158                 p1[i] = (random () & SMALL_CHAR) + 3;
 159             }
 160         }
 161
 162       FOR_EACH_IMPL (impl, 1)
 163         {
 164           MEMSET (p2 - 64, '\1', 512 + 64);
 165           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
 166           if (res != STRCPY_RESULT (p2 + align2, len))
 167             {
 168               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 169                      n, impl->name, align1, align2, len, res,
 170                      STRCPY_RESULT (p2 + align2, len));
 171               ret = 1;
 172             }
 173           for (j = 0; j < align2 + 64; ++j)
 174             {
 175               if (p2[j - 64] != '\1')
 176                 {
 177                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 178                          n, impl->name, align1, align2, len);
 179                   ret = 1;
 180                   break;
 181                 }
 182             }
 183           for (j = align2 + len + 1; j < 512; ++j)
 184             {
 185               if (p2[j] != '\1')
 186                 {
 187                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 188                          n, impl->name, align1, align2, len);
 189                   ret = 1;
 190                   break;
 191                 }
 192             }
 193           if (MEMCMP (p1 + align1, p2 + align2, len + 1))
 194             {
 195               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 196                      n, impl->name, align1, align2, len);
 197               ret = 1;
 198             }
 199         }
 200     }
 201 }
 202
 203 int
 204 test_main (void)
 205 {
 206   size_t i;
 207
 208   test_init ();
 209
 210   printf ("%23s", "");
 211   FOR_EACH_IMPL (impl, 0)
 212     printf ("\t%s", impl->name);
 213   putchar ('\n');
 214
 215   for (i = 0; i < 16; ++i)
 216     {
 217       do_test (0, 0, i, SMALL_CHAR);
 218       do_test (0, 0, i, BIG_CHAR);
 219       do_test (0, i, i, SMALL_CHAR);
 220       do_test (i, 0, i, BIG_CHAR);
 221     }
 222
 223   for (i = 1; i < 8; ++i)
 224     {
 225       do_test (0, 0, 8 << i, SMALL_CHAR);
 226       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 227     }
 228
 229   for (i = 1; i < 8; ++i)
 230     {
 231       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 232       do_test (2 * i, i, 8 << i, BIG_CHAR);
 233       do_test (i, i, 8 << i, SMALL_CHAR);
 234       do_test (i, i, 8 << i, BIG_CHAR);
 235     }
 236
 237   do_random_tests ();
 238   return ret;
 239 }
 240
 241 #include <support/test-driver.c>