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 CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);
  58
  59 IMPL (SIMPLE_STRCPY, 0)
  60 IMPL (STRCPY, 1)
  61
  62 CHAR *
  63 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
  64 {
  65   CHAR *ret = dst;
  66   while ((*dst++ = *src++) != '\0');
  67   return ret;
  68 }
  69 #endif
  70
  71 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  72
  73 static void
  74 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  75              size_t len __attribute__((unused)))
  76 {
  77   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  78     {
  79       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  80              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  81       ret = 1;
  82       return;
  83     }
  84
  85   if (STRCMP (dst, src) != 0)
  86     {
  87       error (0, 0,
  88              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  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, int max_char)
  97 {
  98   size_t i;
  99   CHAR *s1, *s2;
 100 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
 101    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 102    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 103   align1 &= 7;
 104   if ((align1 + len) * sizeof (CHAR) >= page_size)
 105     return;
 106
 107   align2 &= 7;
 108   if ((align2 + len) * sizeof (CHAR) >= page_size)
 109     return;
 110
 111   s1 = (CHAR *) (buf1) + align1;
 112   s2 = (CHAR *) (buf2) + align2;
 113
 114   for (i = 0; i < len; i++)
 115     s1[i] = 32 + 23 * i % (max_char - 32);
 116   s1[len] = 0;
 117
 118   FOR_EACH_IMPL (impl, 0)
 119     do_one_test (impl, s2, s1, len);
 120 }
 121
 122 static void
 123 do_random_tests (void)
 124 {
 125   size_t i, j, n, align1, align2, len;
 126   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 127   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 128   UCHAR *res;
 129
 130   for (n = 0; n < ITERATIONS; n++)
 131     {
 132       /* For wcsrchr: align1 and align2 here mean align not in bytes,
 133          but in wchar_ts, in bytes it will equal to align * (sizeof
 134          (wchar_t)).  For strrchr we need to check all alignments from
 135          0 to 63 since some assembly implementations have separate
 136          prolog for alignments more 48. */
 137
 138       align1 = random () & (63 / sizeof (CHAR));
 139       if (random () & 1)
 140         align2 = random () & (63 / sizeof (CHAR));
 141       else
 142         align2 = align1 + (random () & 24);
 143       len = random () & 511;
 144       j = align1;
 145       if (align2 > j)
 146         j = align2;
 147       if (len + j >= 511)
 148         len = 510 - j - (random () & 7);
 149       j = len + align1 + 64;
 150       if (j > 512)
 151         j = 512;
 152       for (i = 0; i < j; i++)
 153         {
 154           if (i == len + align1)
 155             p1[i] = 0;
 156           else
 157             {
 158               p1[i] = random () & BIG_CHAR;
 159               if (i >= align1 && i < len + align1 && !p1[i])
 160                 p1[i] = (random () & SMALL_CHAR) + 3;
 161             }
 162         }
 163
 164       FOR_EACH_IMPL (impl, 1)
 165         {
 166           MEMSET (p2 - 64, '\1', 512 + 64);
 167           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
 168           if (res != STRCPY_RESULT (p2 + align2, len))
 169             {
 170               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 171                      n, impl->name, align1, align2, len, res,
 172                      STRCPY_RESULT (p2 + align2, len));
 173               ret = 1;
 174             }
 175           for (j = 0; j < align2 + 64; ++j)
 176             {
 177               if (p2[j - 64] != '\1')
 178                 {
 179                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 180                          n, impl->name, align1, align2, len);
 181                   ret = 1;
 182                   break;
 183                 }
 184             }
 185           for (j = align2 + len + 1; j < 512; ++j)
 186             {
 187               if (p2[j] != '\1')
 188                 {
 189                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 190                          n, impl->name, align1, align2, len);
 191                   ret = 1;
 192                   break;
 193                 }
 194             }
 195           if (MEMCMP (p1 + align1, p2 + align2, len + 1))
 196             {
 197               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 198                      n, impl->name, align1, align2, len);
 199               ret = 1;
 200             }
 201         }
 202     }
 203 }
 204
 205 int
 206 test_main (void)
 207 {
 208   size_t i;
 209
 210   test_init ();
 211
 212   printf ("%23s", "");
 213   FOR_EACH_IMPL (impl, 0)
 214     printf ("\t%s", impl->name);
 215   putchar ('\n');
 216
 217   for (i = 0; i < 16; ++i)
 218     {
 219       do_test (0, 0, i, SMALL_CHAR);
 220       do_test (0, 0, i, BIG_CHAR);
 221       do_test (0, i, i, SMALL_CHAR);
 222       do_test (i, 0, i, BIG_CHAR);
 223     }
 224
 225   for (i = 1; i < 8; ++i)
 226     {
 227       do_test (0, 0, 8 << i, SMALL_CHAR);
 228       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 229     }
 230
 231   for (i = 1; i < 8; ++i)
 232     {
 233       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 234       do_test (2 * i, i, 8 << i, BIG_CHAR);
 235       do_test (i, i, 8 << i, SMALL_CHAR);
 236       do_test (i, i, 8 << i, BIG_CHAR);
 237     }
 238
 239   do_random_tests ();
 240   return ret;
 241 }
 242
 243 #include <support/test-driver.c>