1 | /* Copyright (C) 2003-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <setjmp.h> |
19 | #include <signal.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <sys/types.h> |
23 | |
24 | static sigjmp_buf jmpbuf; |
25 | |
26 | static void |
27 | sig_handler (int signo) |
28 | { |
29 | siglongjmp (jmpbuf, 1); |
30 | } |
31 | |
32 | static int |
33 | do_test (void) |
34 | { |
35 | char *p = NULL; |
36 | /* gcc can overwrite the success written value by scheduling instructions |
37 | around sprintf. It is allowed to do this since according to C99 the first |
38 | argument of sprintf is a character array and NULL is not a valid character |
39 | array. Mark the return value as volatile so that it gets reloaded on |
40 | return. */ |
41 | volatile int ret = 0; |
42 | |
43 | if (signal (SIGSEGV, handler: &sig_handler) == SIG_ERR) |
44 | { |
45 | perror ("installing SIGSEGV handler" ); |
46 | return 1; |
47 | } |
48 | |
49 | puts (s: "Attempting to sprintf to null ptr" ); |
50 | if (setjmp (jmpbuf)) |
51 | { |
52 | puts (s: "Exiting main..." ); |
53 | return ret; |
54 | } |
55 | |
56 | sprintf (p, "This should segv\n" ); |
57 | |
58 | return 1; |
59 | } |
60 | |
61 | #define TEST_FUNCTION do_test () |
62 | #include "../test-skeleton.c" |
63 | |