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ba6a0ef3 AB |
1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
213516ef | 3 | Copyright 2021-2023 Free Software Foundation, Inc. |
ba6a0ef3 AB |
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 | #include <stdlib.h> | |
19 | #include <unistd.h> | |
20 | #include <sys/mman.h> | |
21 | #include <stdio.h> | |
22 | ||
23 | /* These will hold the addresses for two memory regions. */ | |
24 | ||
25 | void *region_1; | |
26 | void *region_2; | |
27 | ||
28 | /* Allocate a page of memory using mmap, and return a pointer. */ | |
29 | ||
30 | void * | |
31 | allocate_page (void) | |
32 | { | |
33 | void *addr; | |
34 | int pgsize = sysconf(_SC_PAGE_SIZE); | |
35 | addr = mmap (NULL, pgsize, PROT_EXEC | PROT_READ | PROT_WRITE, | |
36 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); | |
37 | if (addr == MAP_FAILED) | |
38 | perror ("mmap"); | |
39 | } | |
40 | ||
41 | /* Only called so we can create a breakpoint. */ | |
42 | ||
43 | void | |
44 | breakpt (void) | |
45 | { | |
46 | /* Nothing. */ | |
47 | } | |
48 | ||
49 | /* The test. */ | |
50 | ||
51 | int | |
52 | main (void) | |
53 | { | |
54 | region_1 = allocate_page (); | |
55 | region_2 = allocate_page (); | |
56 | ||
57 | breakpt (); /* Break Here. */ | |
58 | } |