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/* Measure __strcpy_chk functions.
Copyright (C) 2013 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
<http://www.gnu.org/licenses/>. */
#ifndef STRCPY_RESULT
# define STRCPY_RESULT(dst, len) dst
# define TEST_MAIN
# define TEST_NAME "strcpy_chk"
# include "bench-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>
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;
}
if (HP_TIMING_AVAIL)
{
hp_timing_t start __attribute ((unused));
hp_timing_t stop __attribute ((unused));;
hp_timing_t best_time = ~ (hp_timing_t) 0;
size_t i;
for (i = 0; i < 32; ++i)
{
HP_TIMING_NOW (start);
CALL (impl, dst, src, dlen);
HP_TIMING_NOW (stop);
HP_TIMING_BEST (best_time, start, stop);
}
printf ("\t%zd", (size_t) best_time);
}
}
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;
if (HP_TIMING_AVAIL && dlen > len)
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len, dlen);
if (HP_TIMING_AVAIL && dlen > len)
putchar ('\n');
}
int
test_main (void)
{
size_t i;
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
sigaction (SIGABRT, &sa, NULL);
/* Avoid all the buffer overflow messages on stderr. */
int fd = open (_PATH_DEVNULL, O_WRONLY);
if (fd == -1)
close (STDERR_FILENO);
else
{
dup2 (fd, STDERR_FILENO);
close (fd);
}
setenv ("LIBC_FATAL_STDERR_", "1", 1);
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);
}
return 0;
}
#include "../test-skeleton.c"
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