string/test-strncat.c

   1 /* Test strncat functions.
   2    Copyright (C) 2011-2024 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #define TEST_MAIN
  19 #ifndef WIDE
  20 # define TEST_NAME "strncat"
  21 #else
  22 # define TEST_NAME "wcsncat"
  23 #endif /* WIDE */
  24 #include "test-string.h"
  25
  26 #ifndef WIDE
  27 # define STRNCAT strncat
  28 # define CHAR char
  29 # define UCHAR unsigned char
  30 # define SIMPLE_STRNCAT simple_strncat
  31 # define STRNLEN strnlen
  32 # define STRLEN strlen
  33 # define MEMSET memset
  34 # define MEMCPY memcpy
  35 # define MEMCMP memcmp
  36 # define BIG_CHAR CHAR_MAX
  37 # define SMALL_CHAR 127
  38 #else
  39 # include <wchar.h>
  40 # define STRNCAT wcsncat
  41 # define CHAR wchar_t
  42 # define UCHAR wchar_t
  43 # define SIMPLE_STRNCAT simple_wcsncat
  44 # define STRNLEN wcsnlen
  45 # define STRLEN wcslen
  46 # define MEMSET wmemset
  47 # define MEMCPY wmemcpy
  48 # define MEMCMP wmemcmp
  49 # define BIG_CHAR WCHAR_MAX
  50 # define SMALL_CHAR 1273
  51 #endif /* WIDE */
  52
  53 typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
  54
  55 IMPL (STRNCAT, 2)
  56
  57 /* Naive implementation to verify results.  */
  58 CHAR *
  59 SIMPLE_STRNCAT (CHAR *dst, const CHAR *src, size_t n)
  60 {
  61   CHAR *ret = dst;
  62   while (*dst++ != '\0');
  63   --dst;
  64   while (n--)
  65     if ((*dst++ = *src++) == '\0')
  66       return ret;
  67   *dst = '\0';
  68   return ret;
  69 }
  70
  71 static void
  72 __attribute__((noinline))
  73 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
  74 {
  75   size_t k = STRLEN (dst);
  76   if (CALL (impl, dst, src, n) != dst)
  77     {
  78       error (0, 0, "Wrong result in function %s %p != %p", impl->name,
  79              CALL (impl, dst, src, n), dst);
  80       ret = 1;
  81       return;
  82     }
  83
  84   size_t len = STRNLEN (src, n);
  85   if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
  86     {
  87       error (0, 0, "Incorrect concatenation in function %s",
  88              impl->name);
  89       ret = 1;
  90       return;
  91     }
  92   if (n < len && dst[k + n] != '\0')
  93     {
  94       error (0, 0, "There is no zero in the end of output string in %s",
  95              impl->name);
  96       ret = 1;
  97       return;
  98     }
  99 }
 100
 101 static void
 102 do_test_src_no_nullterm_bz30065 (void)
 103 {
 104   /* NB: "src does not need to be null-terminated if it contains n or more
 105    * bytes." */
 106   CHAR *s1, *s2;
 107   size_t bound = page_size / sizeof (CHAR);
 108   s1 = (CHAR *) (buf1 + BUF1PAGES * page_size);
 109   s2 = (CHAR *) buf2;
 110   MEMSET (s1 - bound, -1, bound);
 111   for (size_t n = 0; n < bound; ++n)
 112     {
 113       FOR_EACH_IMPL (impl, 0)
 114         {
 115           s2[0] = '\0';
 116           do_one_test (impl, s2, s1 - n, n);
 117         }
 118     }
 119 }
 120
 121 static void
 122 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
 123          size_t n, int max_char)
 124 {
 125   size_t i;
 126   CHAR *s1, *s2;
 127
 128   align1 &= 7;
 129   if ((align1 + len1) * sizeof (CHAR) >= page_size)
 130     return;
 131   if ((align1 + n) * sizeof (CHAR) > page_size)
 132     return;
 133   align2 &= 7;
 134   if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
 135     return;
 136   if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
 137     return;
 138   s1 = (CHAR *) (buf1) + align1;
 139   s2 = (CHAR *) (buf2) + align2;
 140
 141   for (i = 0; i < len1; ++i)
 142     s1[i] = 32 + 23 * i % (max_char - 32);
 143   s1[len1] = '\0';
 144
 145   for (i = 0; i < len2; i++)
 146     s2[i] = 32 + 23 * i % (max_char - 32);
 147
 148   FOR_EACH_IMPL (impl, 0)
 149     {
 150       s2[len2] = '\0';
 151       do_one_test (impl, s2, s1, n);
 152     }
 153 }
 154
 155 static void
 156 do_overflow_tests (void)
 157 {
 158   size_t i, j, len;
 159   const size_t one = 1;
 160   CHAR *s1, *s2;
 161   uintptr_t s1_addr;
 162   s1 = (CHAR *) buf1;
 163   s2 = (CHAR *) buf2;
 164   s1_addr = (uintptr_t)s1;
 165  for (j = 0; j < 200; ++j)
 166       s2[j] = 32 + 23 * j % (BIG_CHAR - 32);
 167  s2[200] = 0;
 168   for (i = 0; i < 750; ++i) {
 169     for (j = 0; j < i; ++j)
 170       s1[j] = 32 + 23 * j % (BIG_CHAR - 32);
 171     s1[i] = '\0';
 172
 173        FOR_EACH_IMPL (impl, 0)
 174     {
 175       s2[200] = '\0';
 176       do_one_test (impl, s2, s1, SIZE_MAX - i);
 177       s2[200] = '\0';
 178       do_one_test (impl, s2, s1, i - s1_addr);
 179       s2[200] = '\0';
 180       do_one_test (impl, s2, s1, -s1_addr - i);
 181       s2[200] = '\0';
 182       do_one_test (impl, s2, s1, SIZE_MAX - s1_addr - i);
 183       s2[200] = '\0';
 184       do_one_test (impl, s2, s1, SIZE_MAX - s1_addr + i);
 185     }
 186
 187     len = 0;
 188     for (j = 8 * sizeof(size_t) - 1; j ; --j)
 189       {
 190         len |= one << j;
 191         FOR_EACH_IMPL (impl, 0)
 192           {
 193             s2[200] = '\0';
 194             do_one_test (impl, s2, s1, len - i);
 195             s2[200] = '\0';
 196             do_one_test (impl, s2, s1, len + i);
 197             s2[200] = '\0';
 198             do_one_test (impl, s2, s1, len - s1_addr - i);
 199             s2[200] = '\0';
 200             do_one_test (impl, s2, s1, len - s1_addr + i);
 201
 202             s2[200] = '\0';
 203             do_one_test (impl, s2, s1, ~len - i);
 204             s2[200] = '\0';
 205             do_one_test (impl, s2, s1, ~len + i);
 206             s2[200] = '\0';
 207             do_one_test (impl, s2, s1, ~len - s1_addr - i);
 208             s2[200] = '\0';
 209             do_one_test (impl, s2, s1, ~len - s1_addr + i);
 210           }
 211       }
 212   }
 213 }
 214
 215 static void
 216 do_random_tests (void)
 217 {
 218   size_t i, j, n, align1, align2, len1, len2, N;
 219   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 220   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 221   UCHAR *p3 = (UCHAR *) buf1;
 222   UCHAR *res;
 223   fprintf (stdout, "Number of iterations in random test = %zd\n",
 224            ITERATIONS);
 225   for (n = 0; n < ITERATIONS; n++)
 226     {
 227       N = random () & 255;
 228       align1 = random () & 31;
 229       if (random () & 1)
 230         align2 = random () & 31;
 231       else
 232         align2 = align1 + (random () & 24);
 233       len1 = random () & 511;
 234       if (len1 + align2 > 512)
 235         len2 = random () & 7;
 236       else
 237         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 238           / (1024 * 1024);
 239       j = align1;
 240       if (align2 + len2 > j)
 241         j = align2 + len2;
 242       if (len1 + j >= 511)
 243         len1 = 510 - j - (random () & 7);
 244       if (len1 >= 512)
 245         len1 = 0;
 246       if (align1 + len1 < 512 - 8)
 247         {
 248           j = 510 - align1 - len1 - (random () & 31);
 249           if (j > 0 && j < 512)
 250             align1 += j;
 251         }
 252       j = len1 + align1 + 64;
 253       if (j > 512)
 254         j = 512;
 255       for (i = 0; i < j; i++)
 256         {
 257           if (i == len1 + align1)
 258             p1[i] = 0;
 259           else
 260             {
 261               p1[i] = random () & BIG_CHAR;
 262               if (i >= align1 && i < len1 + align1 && !p1[i])
 263                 p1[i] = (random () & SMALL_CHAR) + 3;
 264             }
 265         }
 266       for (i = 0; i < len2; i++)
 267         {
 268           p3[i] = random () & BIG_CHAR;
 269           if (!p3[i])
 270             p3[i] = (random () & SMALL_CHAR) + 3;
 271         }
 272       p3[len2] = 0;
 273
 274       FOR_EACH_IMPL (impl, 1)
 275         {
 276           MEMSET (p2 - 64, '\1', align2 + 64);
 277           MEMSET (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 278           MEMCPY (p2 + align2, p3, len2 + 1);
 279           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2),
 280                                 (CHAR *) (p1 + align1), N);
 281           if (res != p2 + align2)
 282             {
 283               error (0, 0, "Iteration %zd - wrong result in function %s "
 284                      "(%zd, %zd, %zd, %zd, %zd) %p != %p",
 285                      n, impl->name, align1, align2, len1, len2, N,
 286                      res, p2 + align2);
 287               ret = 1;
 288             }
 289           for (j = 0; j < align2 + 64; ++j)
 290             {
 291               if (p2[j - 64] != '\1')
 292                 {
 293                   error (0, 0, "Iteration %zd - garbage before dst, %s "
 294                          "%zd, %zd, %zd, %zd, %zd)",
 295                          n, impl->name, align1, align2, len1, len2, N);
 296                   ret = 1;
 297                   break;
 298                 }
 299             }
 300           if (MEMCMP (p2 + align2, p3, len2))
 301             {
 302               error (0, 0, "Iteration %zd - garbage in string before, %s "
 303                      "(%zd, %zd, %zd, %zd, %zd)",
 304                      n, impl->name, align1, align2, len1, len2, N);
 305               ret = 1;
 306             }
 307
 308           if ((len1 + 1) > N)
 309             j = align2 + N + 1 + len2;
 310           else
 311             j = align2 + len1 + 1 + len2;
 312           for (; j < 512; ++j)
 313             {
 314               if (p2[j] != '\1')
 315                 {
 316                   error (0, 0, "Iteration %zd - garbage after, %s "
 317                          "(%zd, %zd, %zd, %zd, %zd)",
 318                          n, impl->name, align1, align2, len1, len2, N);
 319                   ret = 1;
 320                   break;
 321                 }
 322             }
 323           if (len1 + 1 > N)
 324             {
 325               if (p2[align2 + N + len2] != '\0')
 326                 {
 327                   error (0, 0, "Iteration %zd - there is no zero at the "
 328                          "end of output string, %s (%zd, %zd, %zd, %zd, %zd)",
 329                          n, impl->name, align1, align2, len1, len2, N);
 330                   ret = 1;
 331                 }
 332             }
 333           if (MEMCMP (p1 + align1, p2 + align2 + len2,
 334                       (len1 + 1) > N ? N : len1 + 1))
 335             {
 336               error (0, 0, "Iteration %zd - different strings, %s "
 337                      "(%zd, %zd, %zd, %zd, %zd)",
 338                      n, impl->name, align1, align2, len1, len2, N);
 339               ret = 1;
 340             }
 341         }
 342     }
 343 }
 344
 345 int
 346 test_main (void)
 347 {
 348   size_t i, n;
 349
 350   test_init ();
 351
 352   printf ("%28s", "");
 353   FOR_EACH_IMPL (impl, 0)
 354     printf ("\t%s", impl->name);
 355   putchar ('\n');
 356
 357   for (n = 2; n <= 2048; n*=4)
 358     {
 359       do_test (0, 2, 2, 2, n, SMALL_CHAR);
 360       do_test (0, 0, 4, 4, n, SMALL_CHAR);
 361       do_test (4, 0, 4, 4, n, BIG_CHAR);
 362       do_test (0, 0, 8, 8, n, SMALL_CHAR);
 363       do_test (0, 8, 8, 8, n, SMALL_CHAR);
 364
 365       do_test (0, 2, 2, 2, SIZE_MAX, SMALL_CHAR);
 366       do_test (0, 0, 4, 4, SIZE_MAX, SMALL_CHAR);
 367       do_test (4, 0, 4, 4, SIZE_MAX, BIG_CHAR);
 368       do_test (0, 0, 8, 8, SIZE_MAX, SMALL_CHAR);
 369       do_test (0, 8, 8, 8, SIZE_MAX, SMALL_CHAR);
 370
 371       for (i = 1; i < 8; ++i)
 372         {
 373           do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
 374           do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
 375           do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
 376           do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
 377
 378           do_test (0, 0, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 379           do_test (8 - i, 2 * i, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 380           do_test (0, 0, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 381           do_test (8 - i, 2 * i, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 382         }
 383
 384       for (i = 1; i < 8; ++i)
 385         {
 386           do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
 387           do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
 388           do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
 389
 390           do_test (i, 2 * i, 8 << i, 1, SIZE_MAX, SMALL_CHAR);
 391           do_test (2 * i, i, 8 << i, 1, SIZE_MAX, BIG_CHAR);
 392           do_test (i, i, 8 << i, 10, SIZE_MAX, SMALL_CHAR);
 393         }
 394     }
 395
 396   do_random_tests ();
 397   do_overflow_tests ();
 398   do_test_src_no_nullterm_bz30065 ();
 399   return ret;
 400 }
 401
 402 #include <support/test-driver.c>