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// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2025, Klara, Inc.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#define PAGES (8)
int
main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "usage: %s <filename>\n", argv[0]);
exit(1);
}
long page_size = sysconf(_SC_PAGESIZE);
if (page_size < 0) {
perror("sysconf");
exit(2);
}
size_t map_size = page_size * PAGES;
int fd = open(argv[1], O_CREAT|O_RDWR, S_IRWXU|S_IRWXG|S_IRWXO);
if (fd < 0) {
perror("open");
exit(2);
}
if (ftruncate(fd, map_size) < 0) {
perror("ftruncate");
close(fd);
exit(2);
}
uint64_t *p =
mmap(NULL, map_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p == MAP_FAILED) {
perror("mmap");
close(fd);
exit(2);
}
for (int i = 0; i < (map_size / sizeof (uint64_t)); i++)
p[i] = 0x0123456789abcdef;
if (msync(p, map_size, MS_SYNC) < 0) {
perror("msync");
munmap(p, map_size);
close(fd);
exit(3);
}
munmap(p, map_size);
close(fd);
exit(0);
}
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