]>
Commit | Line | Data |
---|---|---|
9015683b TT |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
ecd75fc8 | 3 | Copyright 2004-2014 Free Software Foundation, Inc. |
9015683b TT |
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 <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/mman.h> | |
24 | #include <unistd.h> | |
25 | #include <pthread.h> | |
26 | ||
27 | static void *p; | |
28 | ||
29 | static void | |
30 | handler (int sig, siginfo_t *info, void *context) | |
31 | { | |
32 | /* Copy to local vars, as the test wants to read them, and si_addr, | |
33 | etc. may be preprocessor defines. */ | |
34 | int ssi_errno = info->si_errno; | |
35 | int ssi_signo = info->si_signo; | |
36 | int ssi_code = info->si_code; | |
37 | void *ssi_addr = info->si_addr; | |
38 | ||
39 | _exit (0); /* set breakpoint here */ | |
40 | } | |
41 | ||
42 | static void * | |
43 | segv_thread (void *ptr) | |
44 | { | |
45 | *(int *)ptr = 0; | |
46 | } | |
47 | ||
48 | int | |
49 | main (void) | |
50 | { | |
51 | pthread_t thr; | |
52 | ||
53 | /* Set up unwritable memory. */ | |
54 | { | |
55 | size_t len; | |
56 | len = sysconf(_SC_PAGESIZE); | |
57 | p = mmap (0, len, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); | |
58 | if (p == MAP_FAILED) | |
59 | { | |
60 | perror ("mmap"); | |
61 | return 1; | |
62 | } | |
63 | } | |
64 | /* Set up the signal handler. */ | |
65 | { | |
66 | struct sigaction action; | |
67 | memset (&action, 0, sizeof (action)); | |
68 | action.sa_sigaction = handler; | |
69 | action.sa_flags |= SA_SIGINFO; | |
70 | if (sigaction (SIGSEGV, &action, NULL)) | |
71 | { | |
72 | perror ("sigaction"); | |
73 | return 1; | |
74 | } | |
75 | } | |
76 | ||
77 | /* Create a thread that will trigger SIGSEGV. */ | |
78 | pthread_create (&thr, NULL, segv_thread, p); | |
79 | ||
80 | pthread_join (thr, NULL); | |
81 | ||
82 | return 0; | |
83 | } |