| /* |
| * 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. |
| */ |
| |
| #include "tests.h" |
| #include <dlfcn.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <sys/mman.h> |
| #include <sys/wait.h> |
| #include <sys/sendfile.h> |
| |
| int main(void) |
| { |
| const unsigned long pagesize = sysconf(_SC_PAGESIZE); |
| |
| #ifdef __s390__ |
| /* |
| * The si_addr field is unreliable: |
| * https://marc.info/?l=linux-s390&m=142515870124248&w=2 |
| */ |
| return 77; |
| #endif |
| |
| /* write instruction pointer length to the log */ |
| if (write(-1, NULL, 2 * sizeof(void *)) >= 0) |
| return 77; |
| |
| /* just a noticeable line in the log */ |
| if (munmap(&main, 0) >= 0) |
| return 77; |
| |
| int pid = fork(); |
| if (pid < 0) |
| return 77; |
| |
| if (!pid) { |
| const unsigned long mask = ~(pagesize - 1); |
| unsigned long addr = (unsigned long) &main & mask; |
| unsigned long size = pagesize << 1; |
| |
| #ifdef HAVE_DLADDR |
| Dl_info info; |
| if (dladdr(&main, &info)) { |
| const unsigned long base = |
| (unsigned long) info.dli_fbase & mask; |
| if (base < addr) { |
| size += addr - base; |
| addr = base; |
| } |
| } else |
| #endif |
| { |
| addr -= size; |
| size <<= 1; |
| } |
| |
| /* SIGSEGV is expected */ |
| (void) munmap((void *) addr, size); |
| (void) munmap((void *) addr, size); |
| return 77; |
| } |
| |
| int status; |
| if (wait(&status) != pid || |
| !WIFSIGNALED(status) || |
| WTERMSIG(status) != SIGSEGV) |
| return 77; |
| |
| /* dump process map for debug purposes */ |
| close(0); |
| if (!open("/proc/self/maps", O_RDONLY)) |
| (void) sendfile(1, 0, NULL, pagesize); |
| |
| return 0; |
| } |