1#!/bin/sh 2 3# 4# Copyright (c) 2013 Peter Holm <pho@FreeBSD.org> 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# mlockall(2) test scenario. 30# "panic: vm_page_unwire: page xxx's wire count is zero" seen. 31# http://people.freebsd.org/~pho/stress/log/mlockall.txt 32 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34 35. ../default.cfg 36 37dir=/tmp 38odir=`pwd` 39cd $dir 40sed '1,/^EOF/d' < $odir/$0 > $dir/mlockall3.c 41mycc -o mlockall3 -Wall -Wextra mlockall3.c -lpthread || exit 1 42rm -f mlockall3.c 43cd $odir 44 45/tmp/mlockall3 46 47killall mlockall3 > /dev/null 2>&1 48rm -f /tmp/mlockall3 49exit 50 51EOF 52#include <sys/types.h> 53#include <err.h> 54#include <errno.h> 55#include <fcntl.h> 56#include <pthread.h> 57#include <pwd.h> 58#include <signal.h> 59#include <sys/mman.h> 60#include <stdint.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <string.h> 64#include <sys/param.h> 65#include <sys/stat.h> 66#include <sys/syscall.h> 67#include <sys/wait.h> 68#include <unistd.h> 69 70#define N (128 * 1024 / (int)sizeof(u_int32_t)) 71u_int32_t r[N]; 72 73static void 74hand(int i __unused) { /* handler */ 75 _exit(1); 76} 77 78unsigned long 79makearg(void) 80{ 81 unsigned int i; 82 unsigned long val; 83 84 val = arc4random(); 85 i = arc4random() % 100; 86 if (i < 20) 87 val = val & 0xff; 88 if (i >= 20 && i < 40) 89 val = val & 0xffff; 90 if (i >= 40 && i < 60) 91 val = (unsigned long)(r) | (val & 0xffff); 92#if defined(__LP64__) 93 if (i >= 60) { 94 val = (val << 32) | arc4random(); 95 if (i > 80) 96 val = val & 0x00007fffffffffffUL; 97 } 98#endif 99 100 return(val); 101} 102 103void * 104calls(void *arg __unused) 105{ 106 int i; 107 unsigned long arg1, arg2, arg3; 108 109 usleep(1000); 110 for (i = 0; i < 500; i++) { 111 arg1 = makearg(); 112 arg2 = makearg(); 113 arg3 = makearg(); 114 115 alarm(1); 116 syscall(SYS_mlockall, arg1, arg2, arg3); 117 } 118 119 return (0); 120} 121 122int 123main(void) 124{ 125 struct passwd *pw; 126 pid_t pid; 127 pthread_t cp[50]; 128 int e, i, j; 129 130 if ((pw = getpwnam("nobody")) == NULL) 131 err(1, "no such user: nobody"); 132 133 if (setgroups(1, &pw->pw_gid) || 134 setegid(pw->pw_gid) || setgid(pw->pw_gid) || 135 seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 136 err(1, "Can't drop privileges to \"nobody\""); 137 endpwent(); 138 139 signal(SIGALRM, hand); 140 signal(SIGILL, hand); 141 signal(SIGFPE, hand); 142 signal(SIGSEGV, hand); 143 signal(SIGBUS, hand); 144 signal(SIGURG, hand); 145 signal(SIGSYS, hand); 146 signal(SIGTRAP, hand); 147 148 alarm(180); 149 for (i = 0; i < 8000; i++) { 150 if ((pid = fork()) == 0) { 151 for (j = 0; j < N; j++) 152 r[j] = arc4random(); 153 for (j = 0; j < 50; j++) 154 if ((e = pthread_create(&cp[j], NULL, calls, NULL)) != 0) 155 errc(1, e, "pthread_create"); 156 157 for (j = 0; j < 50; j++) 158 pthread_join(cp[j], NULL); 159 _exit(0); 160 } 161 if (pid == -1) 162 err(1, "fork()"); 163 wait(NULL); 164 } 165 166 return (0); 167} 168