You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.9 KiB
98 lines
2.9 KiB
/*
|
|
* Copyright (c) 2015-2016 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 <assert.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 = get_page_size();
|
|
|
|
#ifdef __s390__
|
|
/*
|
|
* The si_addr field is unreliable:
|
|
* https://marc.info/?l=linux-s390&m=142515870124248&w=2
|
|
*/
|
|
error_msg_and_skip("s390: si_addr is unreliable");
|
|
#endif
|
|
|
|
/* write instruction pointer length to the log */
|
|
assert(write(-1, NULL, 2 * sizeof(void *)) < 0);
|
|
|
|
/* just a noticeable line in the log */
|
|
assert(munmap(&main, 0) < 0);
|
|
|
|
int pid = fork();
|
|
if (pid < 0)
|
|
perror_msg_and_fail("fork");
|
|
|
|
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);
|
|
error_msg_and_skip("SIGSEGV did not happen");
|
|
}
|
|
|
|
int status;
|
|
assert(wait(&status) == pid);
|
|
assert(WIFSIGNALED(status));
|
|
assert(WTERMSIG(status) == SIGSEGV);
|
|
|
|
/* dump process map for debug purposes */
|
|
close(0);
|
|
if (!open("/proc/self/maps", O_RDONLY))
|
|
(void) sendfile(1, 0, NULL, pagesize);
|
|
|
|
return 0;
|
|
}
|