tests/xet_robust_list.c

/*
 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/syscall.h>

#if defined __NR_get_robust_list && defined __NR_set_robust_list

int
main(void)
{
	const size_t page_len = sysconf(_SC_PAGESIZE);
	const pid_t pid = getpid();
	const long long_pid = (unsigned long) (0xdeadbeef00000000LL | pid);

	void *p = mmap(NULL, page_len * 4, PROT_READ | PROT_WRITE,
		       MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
	if (p == MAP_FAILED ||
	    mprotect(p + page_len, page_len, PROT_NONE) ||
	    mprotect(p + page_len * 3, page_len, PROT_NONE))
		return 77;

	void **p_head = p + page_len - sizeof(void *);
	size_t *p_len = p + page_len * 3 - sizeof(size_t);

	if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
		return 77;
	printf("get_robust_list(%d, [%#lx], [%lu]) = 0\n",
	       (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);

	if (syscall(__NR_set_robust_list, p, *p_len))
		return 77;
	printf("set_robust_list(%#lx, %lu) = 0\n",
	       (unsigned long) p, (unsigned long) *p_len);

	if (syscall(__NR_get_robust_list, long_pid, p_head, p_len))
		return 77;
	printf("get_robust_list(%d, [%#lx], [%lu]) = 0\n",
	       (int) pid, (unsigned long) *p_head, (unsigned long) *p_len);

	puts("+++ exited with 0 +++");
	return 0;
}

#else

int
main(void)
{
	return 77;
}

#endif