df696a2fb6
The page size may be dynamically selected on boot. Have the coredump_phnum test helper ask the kernel for the correct value. Sponsored by: The FreeBSD Foundation
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2016, Conrad Meyer
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <err.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
/*
|
|
* This program is intended to create a bunch of segment mappings, then dump
|
|
* core.
|
|
*/
|
|
int
|
|
main(int argc __unused, char **argv __unused)
|
|
{
|
|
void *v;
|
|
size_t i, pages, page_size;
|
|
|
|
page_size = getpagesize();
|
|
pages = UINT16_MAX + 1000;
|
|
v = mmap(NULL, pages * page_size, PROT_READ | PROT_WRITE,
|
|
MAP_ANON | MAP_PRIVATE, -1, 0);
|
|
if (v == NULL)
|
|
err(1, "mmap");
|
|
for (i = 0; i < pages; i += 2) {
|
|
/*
|
|
* Alternate protections to interleave RW and R PT_LOAD
|
|
* segments.
|
|
*/
|
|
if (mprotect((char *)v + i * page_size, page_size,
|
|
PROT_READ) != 0)
|
|
err(1, "mprotect");
|
|
}
|
|
|
|
/* Dump core. */
|
|
abort();
|
|
}
|