1*d0abb9a6SMartin Matuska // SPDX-License-Identifier: CDDL-1.0
2*d0abb9a6SMartin Matuska /*
3*d0abb9a6SMartin Matuska * CDDL HEADER START
4*d0abb9a6SMartin Matuska *
5*d0abb9a6SMartin Matuska * The contents of this file are subject to the terms of the
6*d0abb9a6SMartin Matuska * Common Development and Distribution License (the "License").
7*d0abb9a6SMartin Matuska * You may not use this file except in compliance with the License.
8*d0abb9a6SMartin Matuska *
9*d0abb9a6SMartin Matuska * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*d0abb9a6SMartin Matuska * or https://opensource.org/licenses/CDDL-1.0.
11*d0abb9a6SMartin Matuska * See the License for the specific language governing permissions
12*d0abb9a6SMartin Matuska * and limitations under the License.
13*d0abb9a6SMartin Matuska *
14*d0abb9a6SMartin Matuska * When distributing Covered Code, include this CDDL HEADER in each
15*d0abb9a6SMartin Matuska * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*d0abb9a6SMartin Matuska * If applicable, add the following below this CDDL HEADER, with the
17*d0abb9a6SMartin Matuska * fields enclosed by brackets "[]" replaced with your own identifying
18*d0abb9a6SMartin Matuska * information: Portions Copyright [yyyy] [name of copyright owner]
19*d0abb9a6SMartin Matuska *
20*d0abb9a6SMartin Matuska * CDDL HEADER END
21*d0abb9a6SMartin Matuska */
22*d0abb9a6SMartin Matuska
23*d0abb9a6SMartin Matuska /*
24*d0abb9a6SMartin Matuska * Copyright (c) 2025, Klara, Inc.
25*d0abb9a6SMartin Matuska */
26*d0abb9a6SMartin Matuska
27*d0abb9a6SMartin Matuska #include <stdio.h>
28*d0abb9a6SMartin Matuska #include <unistd.h>
29*d0abb9a6SMartin Matuska #include <stdlib.h>
30*d0abb9a6SMartin Matuska #include <fcntl.h>
31*d0abb9a6SMartin Matuska #include <sys/stat.h>
32*d0abb9a6SMartin Matuska #include <sys/mman.h>
33*d0abb9a6SMartin Matuska
34*d0abb9a6SMartin Matuska #define PAGES (8)
35*d0abb9a6SMartin Matuska
36*d0abb9a6SMartin Matuska int
main(int argc,char ** argv)37*d0abb9a6SMartin Matuska main(int argc, char **argv)
38*d0abb9a6SMartin Matuska {
39*d0abb9a6SMartin Matuska if (argc != 2) {
40*d0abb9a6SMartin Matuska fprintf(stderr, "usage: %s <filename>\n", argv[0]);
41*d0abb9a6SMartin Matuska exit(1);
42*d0abb9a6SMartin Matuska }
43*d0abb9a6SMartin Matuska
44*d0abb9a6SMartin Matuska long page_size = sysconf(_SC_PAGESIZE);
45*d0abb9a6SMartin Matuska if (page_size < 0) {
46*d0abb9a6SMartin Matuska perror("sysconf");
47*d0abb9a6SMartin Matuska exit(2);
48*d0abb9a6SMartin Matuska }
49*d0abb9a6SMartin Matuska size_t map_size = page_size * PAGES;
50*d0abb9a6SMartin Matuska
51*d0abb9a6SMartin Matuska int fd = open(argv[1], O_CREAT|O_RDWR, S_IRWXU|S_IRWXG|S_IRWXO);
52*d0abb9a6SMartin Matuska if (fd < 0) {
53*d0abb9a6SMartin Matuska perror("open");
54*d0abb9a6SMartin Matuska exit(2);
55*d0abb9a6SMartin Matuska }
56*d0abb9a6SMartin Matuska
57*d0abb9a6SMartin Matuska if (ftruncate(fd, map_size) < 0) {
58*d0abb9a6SMartin Matuska perror("ftruncate");
59*d0abb9a6SMartin Matuska close(fd);
60*d0abb9a6SMartin Matuska exit(2);
61*d0abb9a6SMartin Matuska }
62*d0abb9a6SMartin Matuska
63*d0abb9a6SMartin Matuska uint64_t *p =
64*d0abb9a6SMartin Matuska mmap(NULL, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
65*d0abb9a6SMartin Matuska if (p == MAP_FAILED) {
66*d0abb9a6SMartin Matuska perror("mmap");
67*d0abb9a6SMartin Matuska close(fd);
68*d0abb9a6SMartin Matuska exit(2);
69*d0abb9a6SMartin Matuska }
70*d0abb9a6SMartin Matuska
71*d0abb9a6SMartin Matuska for (int i = 0; i < (map_size / sizeof (uint64_t)); i++)
72*d0abb9a6SMartin Matuska p[i] = 0x0123456789abcdef;
73*d0abb9a6SMartin Matuska
74*d0abb9a6SMartin Matuska if (msync(p, map_size, MS_SYNC) < 0) {
75*d0abb9a6SMartin Matuska perror("msync");
76*d0abb9a6SMartin Matuska munmap(p, map_size);
77*d0abb9a6SMartin Matuska close(fd);
78*d0abb9a6SMartin Matuska exit(3);
79*d0abb9a6SMartin Matuska }
80*d0abb9a6SMartin Matuska
81*d0abb9a6SMartin Matuska munmap(p, map_size);
82*d0abb9a6SMartin Matuska close(fd);
83*d0abb9a6SMartin Matuska exit(0);
84*d0abb9a6SMartin Matuska }
85