1/*
2 * Copyright (c) 2016, Conrad Meyer
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <sys/param.h>
31#include <sys/mman.h>
32
33#include <err.h>
34#include <stdint.h>
35#include <stdlib.h>
36
37/*
38 * This program is intended to create a bunch of segment mappings, then dump
39 * core.
40 */
41int
42main(int argc __unused, char **argv __unused)
43{
44	void *v;
45	unsigned i;
46
47	for (i = 0; i < UINT16_MAX + 1000; i++) {
48		/*
49		 * Alternate protections; otherwise the kernel will just extend
50		 * the adjacent same-protection previous mapping.
51		 */
52		v = mmap(NULL, PAGE_SIZE,
53		    (((i % 2) == 0) ? PROT_READ : 0) | PROT_WRITE,
54		    MAP_ANON | MAP_PRIVATE, -1, 0);
55		if (v == MAP_FAILED)
56			err(1, "mmap");
57	}
58
59	/* Dump core. */
60	abort();
61}
62