/*
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* Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tests.h"
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#include <assert.h>
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#include <dlfcn.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <sys/sendfile.h>
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int main(void)
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{
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const unsigned long pagesize = get_page_size();
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#ifdef __s390__
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/*
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* The si_addr field is unreliable:
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* https://marc.info/?l=linux-s390&m=142515870124248&w=2
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*/
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error_msg_and_skip("s390: si_addr is unreliable");
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#endif
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/* write instruction pointer length to the log */
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assert(write(-1, NULL, 2 * sizeof(void *)) < 0);
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/* just a noticeable line in the log */
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assert(munmap(&main, 0) < 0);
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int pid = fork();
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if (pid < 0)
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perror_msg_and_fail("fork");
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if (!pid) {
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const unsigned long mask = ~(pagesize - 1);
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unsigned long addr = (unsigned long) &main & mask;
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unsigned long size = pagesize << 1;
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#ifdef HAVE_DLADDR
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Dl_info info;
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if (dladdr(&main, &info)) {
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const unsigned long base =
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(unsigned long) info.dli_fbase & mask;
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if (base < addr) {
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size += addr - base;
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addr = base;
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}
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} else
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#endif
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{
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addr -= size;
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size <<= 1;
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}
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/* SIGSEGV is expected */
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(void) munmap((void *) addr, size);
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(void) munmap((void *) addr, size);
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error_msg_and_skip("SIGSEGV did not happen");
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}
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int status;
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assert(wait(&status) == pid);
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assert(WIFSIGNALED(status));
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assert(WTERMSIG(status) == SIGSEGV);
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/* dump process map for debug purposes */
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close(0);
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if (!open("/proc/self/maps", O_RDONLY))
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(void) sendfile(1, 0, NULL, pagesize);
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return 0;
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}
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