1 /*
2  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
3  * Copyright (c) 2016-2017 The strace developers.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include "tests.h"
30 #include <stdio.h>
31 #include <sys/mman.h>
32 
33 static void
34 print_mincore(const unsigned int pages, void *const addr,
35 	      const size_t size, unsigned char *const vec)
36 {
37 	unsigned int i;
38 
39 	if (mincore(addr, size, vec))
40 		perror_msg_and_skip("mincore");
41 
42 	printf("mincore(%p, %zu, [", addr, size);
43 	for (i = 0; i < pages; ++i) {
44 		if (i)
45 			printf(", ");
46 		if (i >= DEFAULT_STRLEN) {
47 			printf("...");
48 			break;
49 		}
50 		printf("%u", vec[i] & 1);
51 	}
52 	puts("]) = 0");
53 }
54 
55 static void
56 test_mincore(const unsigned int pages)
57 {
58 	const size_t page_size = get_page_size();
59 	const size_t size = pages * page_size;
60 	void *const addr = tail_alloc(size);
61 	unsigned char *const vec = tail_alloc(pages);
62 
63 	mincore(addr, size, NULL);
64 	printf("mincore(%p, %zu, NULL) = -1 %s (%m)\n",
65 	       addr, size, errno2name());
66 
67 	print_mincore(pages, addr, size, vec);
68 	if (size)
69 		print_mincore(pages, addr, size - page_size + 1, vec);
70 }
71 
72 int main(void)
73 {
74 	test_mincore(1);
75 	test_mincore(2);
76 	test_mincore(DEFAULT_STRLEN);
77 	test_mincore(DEFAULT_STRLEN + 1);
78 
79 	puts("+++ exited with 0 +++");
80 	return 0;
81 }
82