1#!/bin/sh 2 3# 4# Copyright (c) 2012 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# Test scenario idea by kib@ 30 31# "panic: double fault" seen due to recursion 32 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34 35. ../default.cfg 36 37mount | grep -q procfs || mount -t procfs procfs /proc 38here=`pwd` 39cd /tmp 40sed '1,/^EOF/d' < $here/$0 > procfs4.c 41mycc -o procfs4 -Wall -Wextra -O2 procfs4.c || exit 1 42rm -f procfs4.c 43cd $here 44 45su $testuser -c /tmp/procfs4 46e=$? 47 48rm -f /tmp/procfs4 49exit $e 50EOF 51#include <sys/param.h> 52#include <sys/ioctl.h> 53#include <sys/param.h> 54#include <sys/types.h> 55#include <sys/wait.h> 56 57#include <err.h> 58#include <errno.h> 59#include <fcntl.h> 60#include <signal.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <string.h> 64#include <time.h> 65#include <unistd.h> 66 67#define LOOPS 1000 68#define MAXRUN 1200 69#define PARALLEL 10 70 71char *files[] = { 72 "cmdline", 73 "ctl", 74 "dbregs", 75 "etype", 76 "file", 77 "fpregs", 78 "map", 79 "mem", 80 "note", 81 "notepg", 82 "osrel", 83 "regs", 84 "rlimit", 85 "status" 86}; 87 88void 89test(void) 90{ 91 pid_t p; 92 int fd, i, j, n, opens; 93 char path[128]; 94 95 for (i = 0; i < 64; i++) { 96 if ((p = fork()) == 0) { 97 setproctitle("Sleeper"); 98 usleep(20000); 99 usleep(arc4random() % 200); 100 for (j = 0; j < 10000; j++) 101 getpid(); 102 _exit(0); 103 } 104 opens = 0; 105 setproctitle("load"); 106 for (j = 0; j < 14; j++) { 107 snprintf(path, sizeof(path), "/proc/%d/%s", p, files[j]); 108 if ((fd = open(path, O_RDWR)) == -1) 109 if ((fd = open(path, O_RDONLY)) == -1) 110 continue; 111 112 ioctl(fd, FIONREAD, &n); 113 if (ioctl(fd, FIONBIO, &n) != -1) 114 opens++; 115 116 close(fd); 117 } 118 kill(p, SIGHUP); 119#if 0 120 if (opens < 1) 121 fprintf(stderr, "Warn %d open(s) for pid %d\n", opens, getpid()); 122#endif 123 } 124 125 for (i = 0; i < 64; i++) 126 wait(NULL); 127 128 _exit(0); 129} 130 131int 132main(void) 133{ 134 time_t start; 135 int e, i, j; 136 137 e = 0; 138 start = time(NULL); 139 for (i = 0; i < LOOPS; i++) { 140 for (j = 0; j < PARALLEL; j++) { 141 if (fork() == 0) 142 test(); 143 } 144 145 for (j = 0; j < PARALLEL; j++) 146 wait(NULL); 147 usleep(10000); 148 if (time(NULL) - start > MAXRUN) { 149 fprintf(stderr, "FAIL Timeout\n"); 150 e = 1; 151 break; 152 } 153 } 154 155 return (e); 156} 157