1#!/bin/sh 2 3# 4# Copyright (c) 2014 EMC Corp. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Leak of "vm.stats.vm.v_user_wire_count" seen. 30# This test must run in single user mode for accurate leak reporting. 31# Test scenario by: Mark Johnston markj@ 32# Fixed in r269134. 33 34. ../default.cfg 35 36dir=/tmp 37odir=`pwd` 38cd $dir 39sed '1,/^EOF/d' < $odir/$0 > $dir/mmap13.c 40mycc -o mmap13 -O2 -Wall -Wextra mmap13.c || exit 1 41rm -f mmap13.c 42cd $odir 43 44# Both the 5000 and 500 are empirical values. 45# Combined they demonstrate the leak in a consistent way. 46 47v1=`sysctl -n vm.stats.vm.v_user_wire_count` 48for i in `jot 5000`; do 49 /tmp/mmap13 50done 2>&1 | tail -5 51v2=`sysctl -n vm.stats.vm.v_user_wire_count` 52[ $v2 -gt $((v1 + 500)) ] && 53 echo "vm.stats.vm.v_user_wire_count changed from $v1 to $v2." 54 55rm -f /tmp/mmap13 56exit 0 57 58EOF 59#include <sys/mman.h> 60 61#include <err.h> 62#include <stdlib.h> 63#include <unistd.h> 64 65int 66main(void) 67{ 68 void *addr; 69 size_t sz; 70 71 sz = getpagesize(); 72 addr = mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0); 73 if (addr == NULL) 74 err(1, "mmap"); 75 if (mlock(addr, sz) != 0) 76 err(1, "mlock"); 77 if (mprotect(addr, sz, PROT_NONE) != 0) 78 err(1, "mprotect"); 79 80 return (0); 81} 82