| /* |
| * 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 |