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/*
* This file is part of sched_xetaffinity strace test.
*
* Copyright (c) 2016 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.
*/
#include "tests.h"
#include <asm/unistd.h>
#include <sched.h>
#if defined __NR_sched_getaffinity && defined __NR_sched_setaffinity \
&& defined CPU_ISSET_S && defined CPU_ZERO_S && defined CPU_SET_S
# include <assert.h>
# include <errno.h>
# include <stdio.h>
# include <unistd.h>
static int
getaffinity(unsigned long pid, unsigned long size, void *set)
{
return syscall(__NR_sched_getaffinity, pid, size, set);
}
static int
setaffinity(unsigned long pid, unsigned long size, void *set)
{
return syscall(__NR_sched_setaffinity, pid, size, set);
}
int
main(void)
{
unsigned int cpuset_size = 1;
const pid_t pid = getpid();
while (cpuset_size) {
assert(getaffinity(pid, cpuset_size, NULL) == -1);
if (EFAULT == errno)
break;
if (EINVAL != errno)
perror_msg_and_skip("sched_getaffinity");
printf("sched_getaffinity(%d, %u, NULL) = -1 EINVAL (%m)\n",
pid, cpuset_size);
cpuset_size <<= 1;
}
assert(cpuset_size);
printf("sched_getaffinity(%d, %u, NULL) = -1 EFAULT (%m)\n",
pid, cpuset_size);
cpu_set_t *cpuset = tail_alloc(cpuset_size);
assert(getaffinity(pid, cpuset_size, cpuset + 1) == -1);
printf("sched_getaffinity(%d, %u, %p) = -1 EFAULT (%m)\n",
pid, cpuset_size, cpuset + 1);
assert(getaffinity(pid, cpuset_size, cpuset) == (int) cpuset_size);
printf("sched_getaffinity(%d, %u, [", pid, cpuset_size);
const char *sep;
unsigned int i, cpu;
for (i = 0, cpu = 0, sep = ""; i < cpuset_size * 8; ++i) {
if (CPU_ISSET_S(i, cpuset_size, cpuset)) {
printf("%s%u", sep, i);
sep = " ";
cpu = i;
}
}
printf("]) = %u\n", cpuset_size);
CPU_ZERO_S(cpuset_size, cpuset);
CPU_SET_S(cpu, cpuset_size, cpuset);
if (setaffinity(pid, cpuset_size, cpuset))
perror_msg_and_skip("sched_setaffinity");
printf("sched_setaffinity(%d, %u, [%u]) = 0\n",
pid, cpuset_size, cpu);
const unsigned int big_size = cpuset_size < 128 ? 128 : cpuset_size * 2;
cpuset = tail_alloc(big_size);
const int ret_size = getaffinity(pid, big_size, cpuset);
assert(ret_size >= (int) cpuset_size && ret_size <= (int) big_size);
printf("sched_getaffinity(%d, %u, [", pid, big_size);
for (i = 0, sep = ""; i < (unsigned) ret_size * 8; ++i) {
if (CPU_ISSET_S(i, (unsigned) ret_size, cpuset)) {
printf("%s%u", sep, i);
sep = " ";
}
}
printf("]) = %d\n", ret_size);
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_sched_getaffinity && __NR_sched_setaffinity"
" && CPU_ISSET_S && CPU_ZERO_S && CPU_SET_S")
#endif
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