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1/* Copyright (C) 2003-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Bao Duong <bduong@progress.com>, 2003.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <setjmp.h>
20#include <signal.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <sys/types.h>
24
25static sigjmp_buf jmpbuf;
26
27static void
28sig_handler (int signo)
29{
30 siglongjmp (jmpbuf, 1);
31}
32
33static int
34do_test (void)
35{
36 char *p = NULL;
37 /* gcc can overwrite the success written value by scheduling instructions
38 around sprintf. It is allowed to do this since according to C99 the first
39 argument of sprintf is a character array and NULL is not a valid character
40 array. Mark the return value as volatile so that it gets reloaded on
41 return. */
42 volatile int ret = 0;
43
44 if (signal (SIGSEGV, &sig_handler) == SIG_ERR)
45 {
46 perror ("installing SIGSEGV handler");
47 return 1;
48 }
49
50 puts ("Attempting to sprintf to null ptr");
51 if (setjmp (jmpbuf))
52 {
53 puts ("Exiting main...");
54 return ret;
55 }
56
57 sprintf (p, "This should segv\n");
58
59 return 1;
60}
61
62#define TEST_FUNCTION do_test ()
63#include "../test-skeleton.c"
64

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