string/test-strncat.c

   1 /* Test strncat functions.
   2    Copyright (C) 2011-2023 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 STRLEN strlen
  32 # define MEMSET memset
  33 # define MEMCPY memcpy
  34 # define MEMCMP memcmp
  35 # define BIG_CHAR CHAR_MAX
  36 # define SMALL_CHAR 127
  37 #else
  38 # include <wchar.h>
  39 # define STRNCAT wcsncat
  40 # define CHAR wchar_t
  41 # define UCHAR wchar_t
  42 # define SIMPLE_STRNCAT simple_wcsncat
  43 # define STRLEN wcslen
  44 # define MEMSET wmemset
  45 # define MEMCPY wmemcpy
  46 # define MEMCMP wmemcmp
  47 # define BIG_CHAR WCHAR_MAX
  48 # define SMALL_CHAR 1273
  49 #endif /* WIDE */
  50
  51 typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
  52
  53 IMPL (STRNCAT, 2)
  54
  55 /* Naive implementation to verify results.  */
  56 CHAR *
  57 SIMPLE_STRNCAT (CHAR *dst, const CHAR *src, size_t n)
  58 {
  59   CHAR *ret = dst;
  60   while (*dst++ != '\0');
  61   --dst;
  62   while (n--)
  63     if ((*dst++ = *src++) == '\0')
  64       return ret;
  65   *dst = '\0';
  66   return ret;
  67 }
  68
  69 static void
  70 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
  71 {
  72   size_t k = STRLEN (dst);
  73   if (CALL (impl, dst, src, n) != dst)
  74     {
  75       error (0, 0, "Wrong result in function %s %p != %p", impl->name,
  76              CALL (impl, dst, src, n), dst);
  77       ret = 1;
  78       return;
  79     }
  80
  81   size_t len = STRLEN (src);
  82   if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
  83     {
  84       error (0, 0, "Incorrect concatenation in function %s",
  85              impl->name);
  86       ret = 1;
  87       return;
  88     }
  89   if (n < len && dst[k + n] != '\0')
  90     {
  91       error (0, 0, "There is no zero in the end of output string in %s",
  92              impl->name);
  93       ret = 1;
  94       return;
  95     }
  96 }
  97
  98 static void
  99 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
 100          size_t n, int max_char)
 101 {
 102   size_t i;
 103   CHAR *s1, *s2;
 104
 105   align1 &= 7;
 106   if ((align1 + len1) * sizeof (CHAR) >= page_size)
 107     return;
 108   if ((align1 + n) * sizeof (CHAR) > page_size)
 109     return;
 110   align2 &= 7;
 111   if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
 112     return;
 113   if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
 114     return;
 115   s1 = (CHAR *) (buf1) + align1;
 116   s2 = (CHAR *) (buf2) + align2;
 117
 118   for (i = 0; i < len1; ++i)
 119     s1[i] = 32 + 23 * i % (max_char - 32);
 120   s1[len1] = '\0';
 121
 122   for (i = 0; i < len2; i++)
 123     s2[i] = 32 + 23 * i % (max_char - 32);
 124
 125   FOR_EACH_IMPL (impl, 0)
 126     {
 127       s2[len2] = '\0';
 128       do_one_test (impl, s2, s1, n);
 129     }
 130 }
 131
 132 static void
 133 do_overflow_tests (void)
 134 {
 135   size_t i, j, len;
 136   const size_t one = 1;
 137   CHAR *s1, *s2;
 138   uintptr_t s1_addr;
 139   s1 = (CHAR *) buf1;
 140   s2 = (CHAR *) buf2;
 141   s1_addr = (uintptr_t)s1;
 142  for (j = 0; j < 200; ++j)
 143       s2[j] = 32 + 23 * j % (BIG_CHAR - 32);
 144  s2[200] = 0;
 145   for (i = 0; i < 750; ++i) {
 146     for (j = 0; j < i; ++j)
 147       s1[j] = 32 + 23 * j % (BIG_CHAR - 32);
 148     s1[i] = '\0';
 149
 150        FOR_EACH_IMPL (impl, 0)
 151     {
 152       s2[200] = '\0';
 153       do_one_test (impl, s2, s1, SIZE_MAX - i);
 154       s2[200] = '\0';
 155       do_one_test (impl, s2, s1, i - s1_addr);
 156       s2[200] = '\0';
 157       do_one_test (impl, s2, s1, -s1_addr - i);
 158       s2[200] = '\0';
 159       do_one_test (impl, s2, s1, SIZE_MAX - s1_addr - i);
 160       s2[200] = '\0';
 161       do_one_test (impl, s2, s1, SIZE_MAX - s1_addr + i);
 162     }
 163
 164     len = 0;
 165     for (j = 8 * sizeof(size_t) - 1; j ; --j)
 166       {
 167         len |= one << j;
 168         FOR_EACH_IMPL (impl, 0)
 169           {
 170             s2[200] = '\0';
 171             do_one_test (impl, s2, s1, len - i);
 172             s2[200] = '\0';
 173             do_one_test (impl, s2, s1, len + i);
 174             s2[200] = '\0';
 175             do_one_test (impl, s2, s1, len - s1_addr - i);
 176             s2[200] = '\0';
 177             do_one_test (impl, s2, s1, len - s1_addr + i);
 178
 179             s2[200] = '\0';
 180             do_one_test (impl, s2, s1, ~len - i);
 181             s2[200] = '\0';
 182             do_one_test (impl, s2, s1, ~len + i);
 183             s2[200] = '\0';
 184             do_one_test (impl, s2, s1, ~len - s1_addr - i);
 185             s2[200] = '\0';
 186             do_one_test (impl, s2, s1, ~len - s1_addr + i);
 187           }
 188       }
 189   }
 190 }
 191
 192 static void
 193 do_random_tests (void)
 194 {
 195   size_t i, j, n, align1, align2, len1, len2, N;
 196   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 197   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 198   UCHAR *p3 = (UCHAR *) buf1;
 199   UCHAR *res;
 200   fprintf (stdout, "Number of iterations in random test = %zd\n",
 201            ITERATIONS);
 202   for (n = 0; n < ITERATIONS; n++)
 203     {
 204       N = random () & 255;
 205       align1 = random () & 31;
 206       if (random () & 1)
 207         align2 = random () & 31;
 208       else
 209         align2 = align1 + (random () & 24);
 210       len1 = random () & 511;
 211       if (len1 + align2 > 512)
 212         len2 = random () & 7;
 213       else
 214         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 215           / (1024 * 1024);
 216       j = align1;
 217       if (align2 + len2 > j)
 218         j = align2 + len2;
 219       if (len1 + j >= 511)
 220         len1 = 510 - j - (random () & 7);
 221       if (len1 >= 512)
 222         len1 = 0;
 223       if (align1 + len1 < 512 - 8)
 224         {
 225           j = 510 - align1 - len1 - (random () & 31);
 226           if (j > 0 && j < 512)
 227             align1 += j;
 228         }
 229       j = len1 + align1 + 64;
 230       if (j > 512)
 231         j = 512;
 232       for (i = 0; i < j; i++)
 233         {
 234           if (i == len1 + align1)
 235             p1[i] = 0;
 236           else
 237             {
 238               p1[i] = random () & BIG_CHAR;
 239               if (i >= align1 && i < len1 + align1 && !p1[i])
 240                 p1[i] = (random () & SMALL_CHAR) + 3;
 241             }
 242         }
 243       for (i = 0; i < len2; i++)
 244         {
 245           p3[i] = random () & BIG_CHAR;
 246           if (!p3[i])
 247             p3[i] = (random () & SMALL_CHAR) + 3;
 248         }
 249       p3[len2] = 0;
 250
 251       FOR_EACH_IMPL (impl, 1)
 252         {
 253           MEMSET (p2 - 64, '\1', align2 + 64);
 254           MEMSET (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 255           MEMCPY (p2 + align2, p3, len2 + 1);
 256           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2),
 257                                 (CHAR *) (p1 + align1), N);
 258           if (res != p2 + align2)
 259             {
 260               error (0, 0, "Iteration %zd - wrong result in function %s "
 261                      "(%zd, %zd, %zd, %zd, %zd) %p != %p",
 262                      n, impl->name, align1, align2, len1, len2, N,
 263                      res, p2 + align2);
 264               ret = 1;
 265             }
 266           for (j = 0; j < align2 + 64; ++j)
 267             {
 268               if (p2[j - 64] != '\1')
 269                 {
 270                   error (0, 0, "Iteration %zd - garbage before dst, %s "
 271                          "%zd, %zd, %zd, %zd, %zd)",
 272                          n, impl->name, align1, align2, len1, len2, N);
 273                   ret = 1;
 274                   break;
 275                 }
 276             }
 277           if (MEMCMP (p2 + align2, p3, len2))
 278             {
 279               error (0, 0, "Iteration %zd - garbage in string before, %s "
 280                      "(%zd, %zd, %zd, %zd, %zd)",
 281                      n, impl->name, align1, align2, len1, len2, N);
 282               ret = 1;
 283             }
 284
 285           if ((len1 + 1) > N)
 286             j = align2 + N + 1 + len2;
 287           else
 288             j = align2 + len1 + 1 + len2;
 289           for (; j < 512; ++j)
 290             {
 291               if (p2[j] != '\1')
 292                 {
 293                   error (0, 0, "Iteration %zd - garbage after, %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 (len1 + 1 > N)
 301             {
 302               if (p2[align2 + N + len2] != '\0')
 303                 {
 304                   error (0, 0, "Iteration %zd - there is no zero at the "
 305                          "end of output string, %s (%zd, %zd, %zd, %zd, %zd)",
 306                          n, impl->name, align1, align2, len1, len2, N);
 307                   ret = 1;
 308                 }
 309             }
 310           if (MEMCMP (p1 + align1, p2 + align2 + len2,
 311                       (len1 + 1) > N ? N : len1 + 1))
 312             {
 313               error (0, 0, "Iteration %zd - different strings, %s "
 314                      "(%zd, %zd, %zd, %zd, %zd)",
 315                      n, impl->name, align1, align2, len1, len2, N);
 316               ret = 1;
 317             }
 318         }
 319     }
 320 }
 321
 322 int
 323 test_main (void)
 324 {
 325   size_t i, n;
 326
 327   test_init ();
 328
 329   printf ("%28s", "");
 330   FOR_EACH_IMPL (impl, 0)
 331     printf ("\t%s", impl->name);
 332   putchar ('\n');
 333
 334   for (n = 2; n <= 2048; n*=4)
 335     {
 336       do_test (0, 2, 2, 2, n, SMALL_CHAR);
 337       do_test (0, 0, 4, 4, n, SMALL_CHAR);
 338       do_test (4, 0, 4, 4, n, BIG_CHAR);
 339       do_test (0, 0, 8, 8, n, SMALL_CHAR);
 340       do_test (0, 8, 8, 8, n, SMALL_CHAR);
 341
 342       do_test (0, 2, 2, 2, SIZE_MAX, SMALL_CHAR);
 343       do_test (0, 0, 4, 4, SIZE_MAX, SMALL_CHAR);
 344       do_test (4, 0, 4, 4, SIZE_MAX, BIG_CHAR);
 345       do_test (0, 0, 8, 8, SIZE_MAX, SMALL_CHAR);
 346       do_test (0, 8, 8, 8, SIZE_MAX, SMALL_CHAR);
 347
 348       for (i = 1; i < 8; ++i)
 349         {
 350           do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
 351           do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
 352           do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
 353           do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
 354
 355           do_test (0, 0, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 356           do_test (8 - i, 2 * i, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 357           do_test (0, 0, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 358           do_test (8 - i, 2 * i, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 359         }
 360
 361       for (i = 1; i < 8; ++i)
 362         {
 363           do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
 364           do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
 365           do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
 366
 367           do_test (i, 2 * i, 8 << i, 1, SIZE_MAX, SMALL_CHAR);
 368           do_test (2 * i, i, 8 << i, 1, SIZE_MAX, BIG_CHAR);
 369           do_test (i, i, 8 << i, 10, SIZE_MAX, SMALL_CHAR);
 370         }
 371     }
 372
 373   do_random_tests ();
 374   do_overflow_tests ();
 375   return ret;
 376 }
 377
 378 #include <support/test-driver.c>