blob: aef0bc39de8cda56b6fcbb20479be88ce768f731 [file] [log] [blame]
/*
* 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;
}