string/test-strcpy.c

   1 /* Test and measure strcpy functions.
   2    Copyright (C) 1999-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5    Added wcscpy support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #ifdef WIDE
  22 # include <wchar.h>
  23 # define CHAR wchar_t
  24 # define UCHAR wchar_t
  25 # define sfmt "ls"
  26 # define BIG_CHAR WCHAR_MAX
  27 # define SMALL_CHAR 1273
  28 # define STRCMP wcscmp
  29 # define MEMCMP wmemcmp
  30 # define MEMSET wmemset
  31 #else
  32 # define CHAR char
  33 # define UCHAR unsigned char
  34 # define sfmt "s"
  35 # define BIG_CHAR CHAR_MAX
  36 # define SMALL_CHAR 127
  37 # define STRCMP strcmp
  38 # define MEMCMP memcmp
  39 # define MEMSET memset
  40 #endif
  41
  42 #ifndef STRCPY_RESULT
  43 # define STRCPY_RESULT(dst, len) dst
  44 # define TEST_MAIN
  45 # ifndef WIDE
  46 #  define TEST_NAME "strcpy"
  47 # else
  48 #  define TEST_NAME "wcscpy"
  49 # endif
  50 # include "test-string.h"
  51 # ifndef WIDE
  52 #  define SIMPLE_STRCPY simple_strcpy
  53 #  define STRCPY strcpy
  54 # else
  55 #  define SIMPLE_STRCPY simple_wcscpy
  56 #  define STRCPY wcscpy
  57 # endif
  58
  59 CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);
  60
  61 IMPL (SIMPLE_STRCPY, 0)
  62 IMPL (STRCPY, 1)
  63
  64 CHAR *
  65 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
  66 {
  67   CHAR *ret = dst;
  68   while ((*dst++ = *src++) != '\0');
  69   return ret;
  70 }
  71 #endif
  72
  73 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  74
  75 static void
  76 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  77              size_t len __attribute__((unused)))
  78 {
  79   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  80     {
  81       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  82              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  83       ret = 1;
  84       return;
  85     }
  86
  87   if (STRCMP (dst, src) != 0)
  88     {
  89       error (0, 0,
  90              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  91              impl->name, dst, src);
  92       ret = 1;
  93       return;
  94     }
  95 }
  96
  97 static void
  98 do_test (size_t align1, size_t align2, size_t len, int max_char)
  99 {
 100   size_t i;
 101   CHAR *s1, *s2;
 102 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
 103    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 104    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 105   align1 &= 7;
 106   if ((align1 + len) * sizeof (CHAR) >= page_size)
 107     return;
 108
 109   align2 &= 7;
 110   if ((align2 + len) * sizeof (CHAR) >= page_size)
 111     return;
 112
 113   s1 = (CHAR *) (buf1) + align1;
 114   s2 = (CHAR *) (buf2) + align2;
 115
 116   for (i = 0; i < len; i++)
 117     s1[i] = 32 + 23 * i % (max_char - 32);
 118   s1[len] = 0;
 119
 120   FOR_EACH_IMPL (impl, 0)
 121     do_one_test (impl, s2, s1, len);
 122 }
 123
 124 static void
 125 do_random_tests (void)
 126 {
 127   size_t i, j, n, align1, align2, len;
 128   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 129   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 130   UCHAR *res;
 131
 132   for (n = 0; n < ITERATIONS; n++)
 133     {
 134       /* For wcsrchr: align1 and align2 here mean align not in bytes,
 135          but in wchar_ts, in bytes it will equal to align * (sizeof
 136          (wchar_t)).  For strrchr we need to check all alignments from
 137          0 to 63 since some assembly implementations have separate
 138          prolog for alignments more 48. */
 139
 140       align1 = random () & (63 / sizeof (CHAR));
 141       if (random () & 1)
 142         align2 = random () & (63 / sizeof (CHAR));
 143       else
 144         align2 = align1 + (random () & 24);
 145       len = random () & 511;
 146       j = align1;
 147       if (align2 > j)
 148         j = align2;
 149       if (len + j >= 511)
 150         len = 510 - j - (random () & 7);
 151       j = len + align1 + 64;
 152       if (j > 512)
 153         j = 512;
 154       for (i = 0; i < j; i++)
 155         {
 156           if (i == len + align1)
 157             p1[i] = 0;
 158           else
 159             {
 160               p1[i] = random () & BIG_CHAR;
 161               if (i >= align1 && i < len + align1 && !p1[i])
 162                 p1[i] = (random () & SMALL_CHAR) + 3;
 163             }
 164         }
 165
 166       FOR_EACH_IMPL (impl, 1)
 167         {
 168           MEMSET (p2 - 64, '\1', 512 + 64);
 169           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
 170           if (res != STRCPY_RESULT (p2 + align2, len))
 171             {
 172               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 173                      n, impl->name, align1, align2, len, res,
 174                      STRCPY_RESULT (p2 + align2, len));
 175               ret = 1;
 176             }
 177           for (j = 0; j < align2 + 64; ++j)
 178             {
 179               if (p2[j - 64] != '\1')
 180                 {
 181                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 182                          n, impl->name, align1, align2, len);
 183                   ret = 1;
 184                   break;
 185                 }
 186             }
 187           for (j = align2 + len + 1; j < 512; ++j)
 188             {
 189               if (p2[j] != '\1')
 190                 {
 191                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 192                          n, impl->name, align1, align2, len);
 193                   ret = 1;
 194                   break;
 195                 }
 196             }
 197           if (MEMCMP (p1 + align1, p2 + align2, len + 1))
 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         }
 204     }
 205 }
 206
 207 int
 208 test_main (void)
 209 {
 210   size_t i;
 211
 212   test_init ();
 213
 214   printf ("%23s", "");
 215   FOR_EACH_IMPL (impl, 0)
 216     printf ("\t%s", impl->name);
 217   putchar ('\n');
 218
 219   for (i = 0; i < 16; ++i)
 220     {
 221       do_test (0, 0, i, SMALL_CHAR);
 222       do_test (0, 0, i, BIG_CHAR);
 223       do_test (0, i, i, SMALL_CHAR);
 224       do_test (i, 0, i, BIG_CHAR);
 225     }
 226
 227   for (i = 1; i < 8; ++i)
 228     {
 229       do_test (0, 0, 8 << i, SMALL_CHAR);
 230       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 231     }
 232
 233   for (i = 1; i < 8; ++i)
 234     {
 235       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 236       do_test (2 * i, i, 8 << i, BIG_CHAR);
 237       do_test (i, i, 8 << i, SMALL_CHAR);
 238       do_test (i, i, 8 << i, BIG_CHAR);
 239     }
 240
 241   do_random_tests ();
 242   return ret;
 243 }
 244
 245 #include <support/test-driver.c>