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c162e8c9 JM |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
0b302171 | 3 | Copyright 2004, 2007-2012 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 | ||
29 | static void | |
30 | handler (int sig, siginfo_t *info, void *context) | |
31 | { | |
32 | if (info->si_addr == p) | |
33 | printf ("Correct si_addr value.\n"); | |
34 | else | |
35 | printf ("Got si_addr = %p, expected %p.\n", info->si_addr, p); | |
36 | _exit (0); | |
37 | } | |
38 | ||
39 | int | |
40 | main (void) | |
41 | { | |
42 | /* Set up unwritable memory. */ | |
43 | { | |
44 | size_t len; | |
45 | len = sysconf(_SC_PAGESIZE); | |
46 | p = mmap (0, len, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); | |
47 | if (p == MAP_FAILED) | |
48 | { | |
49 | perror ("mmap"); | |
50 | return 1; | |
51 | } | |
52 | } | |
53 | /* Set up the signal handler. */ | |
54 | { | |
55 | struct sigaction action; | |
56 | memset (&action, 0, sizeof (action)); | |
57 | action.sa_sigaction = handler; | |
58 | action.sa_flags |= SA_SIGINFO; | |
59 | if (sigaction (SIGSEGV, &action, NULL)) | |
60 | { | |
61 | perror ("sigaction"); | |
62 | return 1; | |
63 | } | |
64 | } | |
65 | /* Trigger SIGSEGV. */ | |
66 | *(int *)p = 0; | |
67 | return 0; | |
68 | } |