string/test-strcpy.c

   1 /* Test and measure strcpy functions.
   2    Copyright (C) 1999-2024 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 STRCPY strcpy
  51 # else
  52 #  define STRCPY wcscpy
  53 # endif
  54
  55 IMPL (STRCPY, 1)
  56
  57 /* Also check the generic implementation.  */
  58 #undef STRCPY
  59 #undef libc_hidden_builtin_def
  60 #define libc_hidden_builtin_def(a)
  61 #undef libc_hidden_def
  62 #define libc_hidden_def(a)
  63 #undef weak_alias
  64 #define weak_alias(a,b)
  65 #undef attribute_hidden
  66 #define attribute_hidden
  67 # ifndef WIDE
  68 #  define STPCPY __stpcpy_default
  69 #  include "string/stpcpy.c"
  70 #  define STRCPY __strcpy_default
  71 #  define __stpcpy __stpcpy_default
  72 #  include "string/strcpy.c"
  73 IMPL (__strcpy_default, 1)
  74 # else
  75 #  define __wcslen wcslen
  76 #  define __wmemcpy wmemcpy
  77 #  define WCSCPY __wcscpy_default
  78 #  include "wcsmbs/wcscpy.c"
  79 IMPL (__wcscpy_default, 1)
  80 # endif
  81 #endif
  82
  83 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  84
  85 static void
  86 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  87              size_t len __attribute__((unused)))
  88 {
  89   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  90     {
  91       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  92              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  93       ret = 1;
  94       return;
  95     }
  96
  97   if (STRCMP (dst, src) != 0)
  98     {
  99       error (0, 0,
 100              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
 101              impl->name, dst, src);
 102       ret = 1;
 103       return;
 104     }
 105 }
 106
 107 static void
 108 do_test (size_t align1, size_t align2, size_t len, int max_char)
 109 {
 110   size_t i;
 111   CHAR *s1, *s2;
 112 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
 113    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 114    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 115   align1 &= 7;
 116   if ((align1 + len) * sizeof (CHAR) >= page_size)
 117     return;
 118
 119   align2 &= 7;
 120   if ((align2 + len) * sizeof (CHAR) >= page_size)
 121     return;
 122
 123   s1 = (CHAR *) (buf1) + align1;
 124   s2 = (CHAR *) (buf2) + align2;
 125
 126   for (i = 0; i < len; i++)
 127     s1[i] = 32 + 23 * i % (max_char - 32);
 128   s1[len] = 0;
 129
 130   FOR_EACH_IMPL (impl, 0)
 131     do_one_test (impl, s2, s1, len);
 132 }
 133
 134 static void
 135 do_random_tests (void)
 136 {
 137   size_t i, j, n, align1, align2, len;
 138   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 139   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 140   UCHAR *res;
 141
 142   for (n = 0; n < ITERATIONS; n++)
 143     {
 144       /* For wcsrchr: align1 and align2 here mean align not in bytes,
 145          but in wchar_ts, in bytes it will equal to align * (sizeof
 146          (wchar_t)).  For strrchr we need to check all alignments from
 147          0 to 63 since some assembly implementations have separate
 148          prolog for alignments more 48. */
 149
 150       align1 = random () & (63 / sizeof (CHAR));
 151       if (random () & 1)
 152         align2 = random () & (63 / sizeof (CHAR));
 153       else
 154         align2 = align1 + (random () & 24);
 155       len = random () & 511;
 156       j = align1;
 157       if (align2 > j)
 158         j = align2;
 159       if (len + j >= 511)
 160         len = 510 - j - (random () & 7);
 161       j = len + align1 + 64;
 162       if (j > 512)
 163         j = 512;
 164       for (i = 0; i < j; i++)
 165         {
 166           if (i == len + align1)
 167             p1[i] = 0;
 168           else
 169             {
 170               p1[i] = random () & BIG_CHAR;
 171               if (i >= align1 && i < len + align1 && !p1[i])
 172                 p1[i] = (random () & SMALL_CHAR) + 3;
 173             }
 174         }
 175
 176       FOR_EACH_IMPL (impl, 1)
 177         {
 178           MEMSET (p2 - 64, '\1', 512 + 64);
 179           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
 180           if (res != STRCPY_RESULT (p2 + align2, len))
 181             {
 182               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 183                      n, impl->name, align1, align2, len, res,
 184                      STRCPY_RESULT (p2 + align2, len));
 185               ret = 1;
 186             }
 187           for (j = 0; j < align2 + 64; ++j)
 188             {
 189               if (p2[j - 64] != '\1')
 190                 {
 191                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 192                          n, impl->name, align1, align2, len);
 193                   ret = 1;
 194                   break;
 195                 }
 196             }
 197           for (j = align2 + len + 1; j < 512; ++j)
 198             {
 199               if (p2[j] != '\1')
 200                 {
 201                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 202                          n, impl->name, align1, align2, len);
 203                   ret = 1;
 204                   break;
 205                 }
 206             }
 207           if (MEMCMP (p1 + align1, p2 + align2, len + 1))
 208             {
 209               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 210                      n, impl->name, align1, align2, len);
 211               ret = 1;
 212             }
 213         }
 214     }
 215 }
 216
 217 int
 218 test_main (void)
 219 {
 220   size_t i;
 221
 222   test_init ();
 223
 224   printf ("%23s", "");
 225   FOR_EACH_IMPL (impl, 0)
 226     printf ("\t%s", impl->name);
 227   putchar ('\n');
 228
 229   for (i = 0; i < 16; ++i)
 230     {
 231       do_test (0, 0, i, SMALL_CHAR);
 232       do_test (0, 0, i, BIG_CHAR);
 233       do_test (0, i, i, SMALL_CHAR);
 234       do_test (i, 0, i, BIG_CHAR);
 235     }
 236
 237   for (i = 1; i < 8; ++i)
 238     {
 239       do_test (0, 0, 8 << i, SMALL_CHAR);
 240       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 241     }
 242
 243   for (i = 1; i < 8; ++i)
 244     {
 245       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 246       do_test (2 * i, i, 8 << i, BIG_CHAR);
 247       do_test (i, i, 8 << i, SMALL_CHAR);
 248       do_test (i, i, 8 << i, BIG_CHAR);
 249     }
 250
 251   do_random_tests ();
 252   return ret;
 253 }
 254
 255 #include <support/test-driver.c>