mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 13:13:43 +08:00
356 lines
8.0 KiB
C
356 lines
8.0 KiB
C
/* Test and measure __strcpy_chk functions.
|
|
Copyright (C) 1999-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef STRCPY_RESULT
|
|
# define STRCPY_RESULT(dst, len) dst
|
|
# define TEST_MAIN
|
|
# define TEST_NAME "strcpy_chk"
|
|
# include <string/test-string.h>
|
|
|
|
/* This test case implicitly tests the availability of the __chk_fail
|
|
symbol, which is part of the public ABI and may be used
|
|
externally. */
|
|
extern void __attribute__ ((noreturn)) __chk_fail (void);
|
|
char *simple_strcpy_chk (char *, const char *, size_t);
|
|
extern char *normal_strcpy (char *, const char *, size_t)
|
|
__asm ("strcpy");
|
|
extern char *__strcpy_chk (char *, const char *, size_t);
|
|
|
|
IMPL (simple_strcpy_chk, 0)
|
|
IMPL (normal_strcpy, 1)
|
|
IMPL (__strcpy_chk, 2)
|
|
|
|
char *
|
|
simple_strcpy_chk (char *dst, const char *src, size_t len)
|
|
{
|
|
char *ret = dst;
|
|
if (! len)
|
|
__chk_fail ();
|
|
while ((*dst++ = *src++) != '\0')
|
|
if (--len == 0)
|
|
__chk_fail ();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <setjmp.h>
|
|
#include <signal.h>
|
|
|
|
static int test_main (void);
|
|
#define TEST_FUNCTION test_main
|
|
#include <support/test-driver.c>
|
|
#include <support/support.h>
|
|
|
|
volatile int chk_fail_ok;
|
|
jmp_buf chk_fail_buf;
|
|
|
|
static void
|
|
handler (int sig)
|
|
{
|
|
if (chk_fail_ok)
|
|
{
|
|
chk_fail_ok = 0;
|
|
longjmp (chk_fail_buf, 1);
|
|
}
|
|
else
|
|
_exit (127);
|
|
}
|
|
|
|
typedef char *(*proto_t) (char *, const char *, size_t);
|
|
|
|
static void
|
|
do_one_test (impl_t *impl, char *dst, const char *src,
|
|
size_t len, size_t dlen)
|
|
{
|
|
char *res;
|
|
if (dlen <= len)
|
|
{
|
|
if (impl->test == 1)
|
|
return;
|
|
|
|
chk_fail_ok = 1;
|
|
if (setjmp (chk_fail_buf) == 0)
|
|
{
|
|
res = CALL (impl, dst, src, dlen);
|
|
printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
|
|
impl->name, len, dlen);
|
|
chk_fail_ok = 0;
|
|
ret = 1;
|
|
}
|
|
return;
|
|
}
|
|
else
|
|
res = CALL (impl, dst, src, dlen);
|
|
|
|
if (res != STRCPY_RESULT (dst, len))
|
|
{
|
|
printf ("Wrong result in function %s %p %p\n", impl->name,
|
|
res, STRCPY_RESULT (dst, len));
|
|
ret = 1;
|
|
return;
|
|
}
|
|
|
|
if (strcmp (dst, src) != 0)
|
|
{
|
|
printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
|
|
impl->name, dst, src);
|
|
ret = 1;
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
|
|
{
|
|
size_t i;
|
|
char *s1, *s2;
|
|
|
|
align1 &= 7;
|
|
if (align1 + len >= page_size)
|
|
return;
|
|
|
|
align2 &= 7;
|
|
if (align2 + len >= page_size)
|
|
return;
|
|
|
|
s1 = (char *) buf1 + align1;
|
|
s2 = (char *) buf2 + align2;
|
|
|
|
for (i = 0; i < len; i++)
|
|
s1[i] = 32 + 23 * i % (max_char - 32);
|
|
s1[len] = 0;
|
|
|
|
FOR_EACH_IMPL (impl, 0)
|
|
do_one_test (impl, s2, s1, len, dlen);
|
|
}
|
|
|
|
static void
|
|
do_random_tests (void)
|
|
{
|
|
size_t i, j, n, align1, align2, len, dlen;
|
|
unsigned char *p1 = buf1 + page_size - 512;
|
|
unsigned char *p2 = buf2 + page_size - 512;
|
|
unsigned char *res;
|
|
|
|
for (n = 0; n < ITERATIONS; n++)
|
|
{
|
|
align1 = random () & 31;
|
|
if (random () & 1)
|
|
align2 = random () & 31;
|
|
else
|
|
align2 = align1 + (random () & 24);
|
|
len = random () & 511;
|
|
j = align1;
|
|
if (align2 > j)
|
|
j = align2;
|
|
if (len + j >= 511)
|
|
len = 510 - j - (random () & 7);
|
|
j = len + align1 + 64;
|
|
if (j > 512)
|
|
j = 512;
|
|
for (i = 0; i < j; i++)
|
|
{
|
|
if (i == len + align1)
|
|
p1[i] = 0;
|
|
else
|
|
{
|
|
p1[i] = random () & 255;
|
|
if (i >= align1 && i < len + align1 && !p1[i])
|
|
p1[i] = (random () & 127) + 3;
|
|
}
|
|
}
|
|
|
|
switch (random () & 7)
|
|
{
|
|
case 0:
|
|
dlen = len - (random () & 31);
|
|
if (dlen > len)
|
|
dlen = len;
|
|
break;
|
|
case 1:
|
|
dlen = (size_t) -1;
|
|
break;
|
|
case 2:
|
|
dlen = len + 1 + (random () & 65535);
|
|
break;
|
|
case 3:
|
|
dlen = len + 1 + (random () & 255);
|
|
break;
|
|
case 4:
|
|
dlen = len + 1 + (random () & 31);
|
|
break;
|
|
case 5:
|
|
dlen = len + 1 + (random () & 7);
|
|
break;
|
|
case 6:
|
|
dlen = len + 1 + (random () & 3);
|
|
break;
|
|
default:
|
|
dlen = len + 1;
|
|
break;
|
|
}
|
|
|
|
FOR_EACH_IMPL (impl, 1)
|
|
{
|
|
if (dlen <= len)
|
|
{
|
|
if (impl->test != 1)
|
|
{
|
|
chk_fail_ok = 1;
|
|
if (setjmp (chk_fail_buf) == 0)
|
|
{
|
|
res = (unsigned char *)
|
|
CALL (impl, (char *) p2 + align2,
|
|
(char *) p1 + align1, dlen);
|
|
printf ("Iteration %zd - did not __chk_fail\n", n);
|
|
chk_fail_ok = 0;
|
|
ret = 1;
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
memset (p2 - 64, '\1', 512 + 64);
|
|
res = (unsigned char *)
|
|
CALL (impl, (char *) p2 + align2, (char *) p1 + align1, dlen);
|
|
if (res != STRCPY_RESULT (p2 + align2, len))
|
|
{
|
|
printf ("\
|
|
Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
|
|
n, impl->name, align1, align2, len, res,
|
|
STRCPY_RESULT (p2 + align2, len));
|
|
ret = 1;
|
|
}
|
|
for (j = 0; j < align2 + 64; ++j)
|
|
{
|
|
if (p2[j - 64] != '\1')
|
|
{
|
|
printf ("\
|
|
Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
|
|
n, impl->name, align1, align2, len);
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
for (j = align2 + len + 1; j < 512; ++j)
|
|
{
|
|
if (p2[j] != '\1')
|
|
{
|
|
printf ("\
|
|
Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
|
|
n, impl->name, align1, align2, len);
|
|
ret = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (memcmp (p1 + align1, p2 + align2, len + 1))
|
|
{
|
|
printf ("\
|
|
Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
|
|
n, impl->name, align1, align2, len);
|
|
ret = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
test_main (void)
|
|
{
|
|
size_t i;
|
|
|
|
set_fortify_handler (handler);
|
|
|
|
test_init ();
|
|
|
|
printf ("%23s", "");
|
|
FOR_EACH_IMPL (impl, 0)
|
|
printf ("\t%s", impl->name);
|
|
putchar ('\n');
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
{
|
|
do_test (0, 0, i, i + 1, 127);
|
|
do_test (0, 0, i, i + 1, 255);
|
|
do_test (0, i, i, i + 1, 127);
|
|
do_test (i, 0, i, i + 1, 255);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 0, 8 << i, (8 << i) + 1, 127);
|
|
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
|
|
do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
|
|
do_test (i, i, (8 << i), (8 << i) + 1, 127);
|
|
do_test (i, i, (8 << i), (8 << i) + 1, 255);
|
|
}
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
{
|
|
do_test (0, 0, i, i + 256, 127);
|
|
do_test (0, 0, i, i + 256, 255);
|
|
do_test (0, i, i, i + 256, 127);
|
|
do_test (i, 0, i, i + 256, 255);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 0, 8 << i, (8 << i) + 256, 127);
|
|
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
|
|
do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
|
|
do_test (i, i, (8 << i), (8 << i) + 256, 127);
|
|
do_test (i, i, (8 << i), (8 << i) + 256, 255);
|
|
}
|
|
|
|
for (i = 0; i < 16; ++i)
|
|
{
|
|
do_test (0, 0, i, i, 127);
|
|
do_test (0, 0, i, i + 2, 255);
|
|
do_test (0, i, i, i + 3, 127);
|
|
do_test (i, 0, i, i + 4, 255);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (0, 0, 8 << i, (8 << i) - 15, 127);
|
|
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
|
|
}
|
|
|
|
for (i = 1; i < 8; ++i)
|
|
{
|
|
do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
|
|
do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
|
|
do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
|
|
do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
|
|
}
|
|
|
|
do_random_tests ();
|
|
return ret;
|
|
}
|