string/stratcliff.c

   1 /* Test for string function add boundaries of usable memory.
   2    Copyright (C) 1996,1997,1999,2000,2001,2002 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #define _GNU_SOURCE 1
  22
  23 /* Make sure we don't test the optimized inline functions if we want to
  24    test the real implementation.  */
  25 #undef __USE_STRING_INLINES
  26
  27 #include <errno.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/mman.h>
  32 #include <sys/param.h>
  33
  34 #ifndef MAX
  35 #define MAX(a, b) ((a) > (b) ? (a) : (b))
  36 #endif
  37
  38 int
  39 main (int argc, char *argv[])
  40 {
  41   int size = sysconf (_SC_PAGESIZE);
  42   char *adr, *dest;
  43   int result = 0;
  44
  45   adr = (char *) mmap (NULL, 3 * size, PROT_READ | PROT_WRITE,
  46                        MAP_PRIVATE | MAP_ANON, -1, 0);
  47   dest = (char *) mmap (NULL, 3 * size, PROT_READ | PROT_WRITE,
  48                         MAP_PRIVATE | MAP_ANON, -1, 0);
  49   if (adr == MAP_FAILED || dest == MAP_FAILED)
  50     {
  51       if (errno == ENOSYS)
  52         puts ("No test, mmap not available.");
  53       else
  54         {
  55           printf ("mmap failed: %m");
  56           result = 1;
  57         }
  58     }
  59   else
  60     {
  61       int inner, middle, outer;
  62
  63       mprotect(adr, size, PROT_NONE);
  64       mprotect(adr + 2 * size, size, PROT_NONE);
  65       adr += size;
  66
  67       mprotect(dest, size, PROT_NONE);
  68       mprotect(dest + 2 * size, size, PROT_NONE);
  69       dest += size;
  70
  71       memset (adr, 'T', size);
  72
  73       /* strlen test */
  74       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
  75         {
  76           for (inner = MAX (outer, size - 64); inner < size; ++inner)
  77             {
  78               adr[inner] = '\0';
  79
  80               if (strlen (&adr[outer]) != (size_t) (inner - outer))
  81                 {
  82                   printf ("strlen flunked for outer = %d, inner = %d\n",
  83                           outer, inner);
  84                   result = 1;
  85                 }
  86
  87               adr[inner] = 'T';
  88             }
  89         }
  90
  91       /* strchr test */
  92       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
  93         {
  94           for (middle = MAX (outer, size - 64); middle < size; ++middle)
  95             {
  96               for (inner = middle; inner < size; ++inner)
  97                 {
  98                   char *cp;
  99                   adr[middle] = 'V';
 100                   adr[inner] = '\0';
 101
 102                   cp = strchr (&adr[outer], 'V');
 103
 104                   if ((inner == middle && cp != NULL)
 105                       || (inner != middle
 106                           && (cp - &adr[outer]) != middle - outer))
 107                     {
 108                       printf ("strchr flunked for outer = %d, middle = %d, "
 109                               "inner = %d\n", outer, middle, inner);
 110                       result = 1;
 111                     }
 112
 113                   adr[inner] = 'T';
 114                   adr[middle] = 'T';
 115                 }
 116             }
 117         }
 118
 119       /* Special test.  */
 120       adr[size - 1] = '\0';
 121       if (strchr (&adr[size - 1], '\n') != NULL)
 122         {
 123           puts ("strchr flunked for test of empty string at end of page");
 124           result = 1;
 125         }
 126
 127       /* strrchr test */
 128       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 129         {
 130           for (middle = MAX (outer, size - 64); middle < size; ++middle)
 131             {
 132               for (inner = middle; inner < size; ++inner)
 133                 {
 134                   char *cp;
 135                   adr[middle] = 'V';
 136                   adr[inner] = '\0';
 137
 138                   cp = strrchr (&adr[outer], 'V');
 139
 140                   if ((inner == middle && cp != NULL)
 141                       || (inner != middle
 142                           && (cp - &adr[outer]) != middle - outer))
 143                     {
 144                       printf ("strrchr flunked for outer = %d, middle = %d, "
 145                               "inner = %d\n", outer, middle, inner);
 146                       result = 1;
 147                     }
 148
 149                   adr[inner] = 'T';
 150                   adr[middle] = 'T';
 151                 }
 152             }
 153         }
 154
 155       /* rawmemchr test */
 156       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 157         {
 158           for (middle = MAX (outer, size - 64); middle < size; ++middle)
 159             {
 160               char *cp;
 161               adr[middle] = 'V';
 162
 163               cp = rawmemchr (&adr[outer], 'V');
 164
 165               if (cp - &adr[outer] != middle - outer)
 166                 {
 167                   printf ("rawmemchr flunked for outer = %d, middle = %d\n",
 168                           outer, middle);
 169                   result = 1;
 170                 }
 171
 172               adr[middle] = 'T';
 173             }
 174         }
 175
 176       /* strcpy test */
 177       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 178         {
 179           for (inner = MAX (outer, size - 64); inner < size; ++inner)
 180             {
 181               adr[inner] = '\0';
 182
 183               if (strcpy (dest, &adr[outer]) != dest
 184                   || strlen (dest) != (size_t) (inner - outer))
 185                 {
 186                   printf ("strcpy flunked for outer = %d, inner = %d\n",
 187                           outer, inner);
 188                   result = 1;
 189                 }
 190
 191               adr[inner] = 'T';
 192             }
 193         }
 194
 195       /* strncpy tests */
 196       adr[size-1] = 'T';
 197       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 198         {
 199           size_t len;
 200
 201           for (len = 0; len < size - outer; ++len)
 202             {
 203               if (strncpy (dest, &adr[outer], len) != dest
 204                   || memcmp (dest, &adr[outer], len) != 0)
 205                 {
 206                   printf ("outer strncpy flunked for outer = %d, len = %Zd\n",
 207                           outer, len);
 208                   result = 1;
 209                 }
 210             }
 211         }
 212       adr[size-1] = '\0';
 213
 214       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 215         {
 216           for (inner = MAX (outer, size - 64); inner < size; ++inner)
 217             {
 218               size_t len;
 219
 220               adr[inner] = '\0';
 221
 222               for (len = 0; len < size - outer + 64; ++len)
 223                 {
 224                   if (strncpy (dest, &adr[outer], len) != dest
 225                       || memcmp (dest, &adr[outer],
 226                                  MIN (inner - outer, len)) != 0
 227                       || (inner - outer < len
 228                           && strlen (dest) != (inner - outer)))
 229                     {
 230                       printf ("strncpy flunked for outer = %d, inner = %d, len = %Zd\n",
 231                               outer, inner, len);
 232                       result = 1;
 233                     }
 234                   if (strncpy (dest + 1, &adr[outer], len) != dest + 1
 235                       || memcmp (dest + 1, &adr[outer],
 236                                  MIN (inner - outer, len)) != 0
 237                       || (inner - outer < len
 238                           && strlen (dest + 1) != (inner - outer)))
 239                     {
 240                       printf ("strncpy+1 flunked for outer = %d, inner = %d, len = %Zd\n",
 241                               outer, inner, len);
 242                       result = 1;
 243                     }
 244                 }
 245
 246               adr[inner] = 'T';
 247             }
 248         }
 249
 250       /* stpcpy test */
 251       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 252         {
 253           for (inner = MAX (outer, size - 64); inner < size; ++inner)
 254             {
 255               adr[inner] = '\0';
 256
 257               if ((stpcpy (dest, &adr[outer]) - dest) != inner - outer)
 258                 {
 259                   printf ("stpcpy flunked for outer = %d, inner = %d\n",
 260                           outer, inner);
 261                   result = 1;
 262                 }
 263
 264               adr[inner] = 'T';
 265             }
 266         }
 267
 268       /* stpncpy test */
 269       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 270         {
 271           for (middle = MAX (outer, size - 64); middle < size; ++middle)
 272             {
 273               adr[middle] = '\0';
 274
 275               for (inner = 0; inner < size - outer; ++ inner)
 276                 {
 277                   if ((stpncpy (dest, &adr[outer], inner) - dest)
 278                       != MIN (inner, middle - outer))
 279                     {
 280                       printf ("stpncpy flunked for outer = %d, middle = %d, "
 281                               "inner = %d\n", outer, middle, inner);
 282                       result = 1;
 283                     }
 284                 }
 285
 286               adr[middle] = 'T';
 287             }
 288         }
 289
 290       /* memcpy test */
 291       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 292         for (inner = 0; inner < size - outer; ++inner)
 293           if (memcpy (dest, &adr[outer], inner) !=  dest)
 294             {
 295               printf ("memcpy flunked for outer = %d, inner = %d\n",
 296                       outer, inner);
 297               result = 1;
 298             }
 299
 300       /* mempcpy test */
 301       for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
 302         for (inner = 0; inner < size - outer; ++inner)
 303           if (mempcpy (dest, &adr[outer], inner) !=  dest + inner)
 304             {
 305               printf ("mempcpy flunked for outer = %d, inner = %d\n",
 306                       outer, inner);
 307               result = 1;
 308             }
 309     }
 310
 311   return result;
 312 }