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/* Test for string function add boundaries of usable memory.
Copyright (C) 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#define _GNU_SOURCE 1
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/param.h>
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
int
main (int argc, char *argv[])
{
int size = sysconf (_SC_PAGESIZE);
char *adr, *dest;
int result = 0;
adr = (char *) mmap (NULL, 3 * size, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
dest = (char *) mmap (NULL, 3*size, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (adr == MAP_FAILED || dest == MAP_FAILED)
{
if (errno == ENOSYS)
puts ("No test, mmap not available.");
else
{
printf ("mmap failed: %m");
result = 1;
}
}
else
{
int inner, middle, outer;
mprotect(adr, size, PROT_NONE);
mprotect(adr+2*size, size, PROT_NONE);
adr += size;
mprotect(dest, size, PROT_NONE);
mprotect(dest+2*size, size, PROT_NONE);
dest += size;
memset (adr, 'T', size);
/* strlen test */
for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
{
for (inner = MAX (outer, size - 64); inner < size; ++inner)
{
adr[inner] = '\0';
if (strlen (&adr[outer]) != (size_t) (inner - outer))
{
printf ("strlen flunked for outer = %d, inner = %d\n",
outer, inner);
result = 1;
}
adr[inner] = 'T';
}
}
/* strchr test */
for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
{
for (middle = MAX (outer, size - 64); middle < size; ++middle)
{
for (inner = middle; inner < size; ++inner)
{
char *cp;
adr[middle] = 'V';
adr[inner] = '\0';
cp = strchr (&adr[outer], 'V');
if ((inner == middle && cp != NULL)
|| (inner != middle
&& (cp - &adr[outer]) != middle - outer))
{
printf ("strchr flunked for outer = %d, middle = %d, "
"inner = %d\n", outer, middle, inner);
result = 1;
}
adr[inner] = 'T';
adr[middle] = 'T';
}
}
}
/* strrchr test */
for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
{
for (middle = MAX (outer, size - 64); middle < size; ++middle)
{
for (inner = middle; inner < size; ++inner)
{
char *cp;
adr[middle] = 'V';
adr[inner] = '\0';
cp = strrchr (&adr[outer], 'V');
if ((inner == middle && cp != NULL)
|| (inner != middle
&& (cp - &adr[outer]) != middle - outer))
{
printf ("strrchr flunked for outer = %d, middle = %d, "
"inner = %d\n", outer, middle, inner);
result = 1;
}
adr[inner] = 'T';
adr[middle] = 'T';
}
}
}
/* strcpy test */
for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
{
for (inner = MAX (outer, size - 64); inner < size; ++inner)
{
adr[inner] = '\0';
if (strcpy (dest, &adr[outer]) != dest
|| strlen (dest) != (size_t) (inner - outer))
{
printf ("strcpy flunked for outer = %d, inner = %d\n",
outer, inner);
result = 1;
}
adr[inner] = 'T';
}
}
/* stpcpy test */
for (outer = size - 1; outer >= MAX (0, size - 128); --outer)
{
for (inner = MAX (outer, size - 64); inner < size; ++inner)
{
adr[inner] = '\0';
if ((stpcpy (dest, &adr[outer]) - dest) != inner - outer)
{
printf ("stpcpy flunked for outer = %d, inner = %d\n",
outer, inner);
result = 1;
}
adr[inner] = 'T';
}
}
}
return result;
}
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