1 /* Test that sigprocmask does not read from the unused part of jmpbuf.
2 Copyright (C) 2017-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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 <https://www.gnu.org/licenses/>. */
18
19 #include <stdlib.h>
20 #include <signal.h>
21 #include <string.h>
22 #include <errno.h>
23 #include <setjmpP.h>
24 #include <support/next_to_fault.h>
25
26 #define SIZEOF_SIGSET_T sizeof (__jmp_buf_sigset_t)
27
28 static int
do_test(void)29 do_test (void)
30 {
31 sigjmp_buf sj;
32 struct support_next_to_fault sigset_t_buf
33 = support_next_to_fault_allocate (SIZEOF_SIGSET_T);
34 sigset_t *m_p = (sigset_t *) sigset_t_buf.buffer;
35 sigset_t m;
36
37 sigemptyset (&m);
38 memcpy (m_p, &m, SIZEOF_SIGSET_T);
39 sigprocmask (SIG_SETMASK, m_p, NULL);
40 memcpy (&m, m_p, SIZEOF_SIGSET_T);
41 if (sigsetjmp (sj, 0) == 0)
42 {
43 sigaddset (&m, SIGUSR1);
44 memcpy (m_p, &m, SIZEOF_SIGSET_T);
45 sigprocmask (SIG_SETMASK, m_p, NULL);
46 memcpy (&m, m_p, SIZEOF_SIGSET_T);
47 siglongjmp (sj, 1);
48 return EXIT_FAILURE;
49 }
50 sigprocmask (SIG_SETMASK, NULL, m_p);
51 memcpy (&m, m_p, SIZEOF_SIGSET_T);
52 return sigismember (&m, SIGUSR1) ? EXIT_SUCCESS : EXIT_FAILURE;
53 }
54
55 #include <support/test-driver.c>
56