Commit | Line | Data |
---|---|---|
c162e8c9 JM |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2004-2020 Free Software Foundation, Inc. |
c162e8c9 JM |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program 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 | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | ||
18 | */ | |
19 | ||
20 | #include <signal.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/mman.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | static void *p; | |
28 | ||
65566918 PA |
29 | void |
30 | pass (void) | |
31 | { | |
32 | } | |
33 | ||
c162e8c9 JM |
34 | static void |
35 | handler (int sig, siginfo_t *info, void *context) | |
36 | { | |
37 | if (info->si_addr == p) | |
65566918 | 38 | pass (); |
c162e8c9 JM |
39 | _exit (0); |
40 | } | |
41 | ||
42 | int | |
43 | main (void) | |
44 | { | |
45 | /* Set up unwritable memory. */ | |
46 | { | |
47 | size_t len; | |
48 | len = sysconf(_SC_PAGESIZE); | |
49 | p = mmap (0, len, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); | |
50 | if (p == MAP_FAILED) | |
51 | { | |
52 | perror ("mmap"); | |
53 | return 1; | |
54 | } | |
55 | } | |
56 | /* Set up the signal handler. */ | |
57 | { | |
58 | struct sigaction action; | |
59 | memset (&action, 0, sizeof (action)); | |
60 | action.sa_sigaction = handler; | |
61 | action.sa_flags |= SA_SIGINFO; | |
62 | if (sigaction (SIGSEGV, &action, NULL)) | |
63 | { | |
64 | perror ("sigaction"); | |
65 | return 1; | |
66 | } | |
67 | } | |
68 | /* Trigger SIGSEGV. */ | |
69 | *(int *)p = 0; | |
70 | return 0; | |
71 | } |