1#!/bin/sh 2 3# 4# Copyright (c) 2015 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# Regression test for r287591: 30 31# From the commit log: 32# Remove a check which caused spurious SIGSEGV on usermode access to the 33# mapped address without valid pte installed, when parallel wiring of 34# the entry happen. The entry must be copy on write. If entry is COW 35# but was already copied, and parallel wiring set 36# MAP_ENTRY_IN_TRANSITION, vm_fault() would sleep waiting for the 37# MAP_ENTRY_IN_TRANSITION flag to clear. After that, the fault handler 38# is restarted and vm_map_lookup() or vm_map_lookup_locked() trip over 39# the check. Note that this is race, if the address is accessed after 40# the wiring is done, the entry does not fault at all. 41 42# Test scenario by kib@. 43 44. ../default.cfg 45 46[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 47 48dir=/tmp 49odir=`pwd` 50cd $dir 51sed '1,/^EOF/d' < $odir/$0 > $dir/mlockall5.c 52mycc -o mlockall5 -Wall -Wextra -O0 -g mlockall5.c -lpthread || exit 1 53rm -f mlockall5.c 54cd $odir 55 56mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 57[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 58mdconfig -a -t swap -s 512m -u $mdstart || exit 1 59bsdlabel -w md$mdstart auto 60newfs $newfs_flags -n md${mdstart}$part > /dev/null 61mount /dev/md${mdstart}$part $mntpoint || exit 1 62 63(cd $mntpoint; /tmp/mlockall5 || echo FAIL) 64 65n=0 66while mount | grep "on $mntpoint " | grep -q /dev/md; do 67 umount $mntpoint || sleep 1 68 n=$((n + 1)) 69 [ $n -gt 10 ] && { echo FAIL; exit 1; } 70done 71mdconfig -d -u $mdstart 72rm -rf /tmp/mlockall5 73exit 74 75EOF 76#include <sys/param.h> 77#include <sys/mman.h> 78#include <sys/stat.h> 79#include <sys/wait.h> 80 81#include <err.h> 82#include <errno.h> 83#include <fcntl.h> 84#include <pthread.h> 85#include <stdio.h> 86#include <stdlib.h> 87#include <unistd.h> 88 89size_t clen; 90volatile u_int share; 91int ps; 92char *c; 93 94void * 95touch(void *arg __unused) 96{ 97 98 int i; 99 100 while (share == 0) 101 ; 102 for (i = 0; i < (int)clen; i += ps) 103 c[i] = 1; 104 105 return (NULL); 106} 107 108void * 109ml(void *arg __unused) 110{ 111 while (share == 0) 112 ; 113 if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) 114 err(1, "mlock"); 115 116 return (NULL); 117} 118 119int 120test(void) 121{ 122 pthread_t tid[2]; 123 int i, rc, status; 124 125 if (fork() == 0) { 126 alarm(60); 127 rc = pthread_create(&tid[0], NULL, touch, NULL); 128 if (rc != 0) 129 errc(1, rc, "pthread_create()"); 130 rc = pthread_create(&tid[1], NULL, ml, NULL); 131 if (rc != 0) 132 errc(1, rc, "pthread_create()"); 133 share = 1; 134 for (i = 0; i < (int)nitems(tid); i++) { 135 rc = pthread_join(tid[i], NULL); 136 if (rc != 0) 137 errc(1, rc, "pthread_join(%d)", i); 138 } 139 _exit(0); 140 } 141 142 if (wait(&status) == -1) 143 err(1, "wait"); 144 145 return (WTERMSIG(status)); 146} 147 148int 149main(void) 150{ 151 int s; 152 153 ps = getpagesize(); 154 clen = 32 * 1024; 155 if ((c = mmap(NULL, clen, PROT_READ | PROT_WRITE, MAP_ANON | MAP_SHARED, 156 -1, 0)) == MAP_FAILED) 157 err(1, "mmap"); 158 159 s = test(); 160 161 return (s); 162} 163