| /* |
| * 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 <sys/syscall.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 |