blob: 982f50824a47e6e888dbe6202841af3adfc7d5f9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/* Copyright (C) 2003-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bao Duong <bduong@progress.com>, 2003.
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/>. */
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
static sigjmp_buf jmpbuf;
static void
sig_handler (int signo)
{
siglongjmp (jmpbuf, 1);
}
static int
do_test (void)
{
char *p = NULL;
/* gcc can overwrite the success written value by scheduling instructions
around sprintf. It is allowed to do this since according to C99 the first
argument of sprintf is a character array and NULL is not a valid character
array. Mark the return value as volatile so that it gets reloaded on
return. */
volatile int ret = 0;
if (signal (SIGSEGV, &sig_handler) == SIG_ERR)
{
perror ("installing SIGSEGV handler");
return 1;
}
puts ("Attempting to sprintf to null ptr");
if (setjmp (jmpbuf))
{
puts ("Exiting main...");
return ret;
}
sprintf (p, "This should segv\n");
return 1;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
