1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# No problems seen. 31 32. ../default.cfg 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/kevent15.c 38mycc -o kevent15 -Wall -Wextra -O0 -g kevent15.c || exit 1 39rm -f kevent15.c 40cd $odir 41 42(cd ../testcases/swap; ./swap -t 3m -i 20 -l 80) & 43sleep 2 44cd $dir 45timeout 5m ./kevent15 46s=$? 47while pkill swap; do sleep .1; done 48wait 49[ -f kevent15.core -a $s -eq 0 ] && 50 { ls -l kevent15.core; s=1; } 51cd $odir 52 53rm -rf $dir/kevent15 54exit $s 55 56EOF 57#include <sys/param.h> 58#include <sys/event.h> 59#include <sys/mman.h> 60#include <sys/stat.h> 61#include <sys/wait.h> 62 63#include <err.h> 64#include <errno.h> 65#include <fcntl.h> 66#include <signal.h> 67#include <stdatomic.h> 68#include <stdio.h> 69#include <stdlib.h> 70#include <time.h> 71#include <unistd.h> 72 73static _Atomic(int) *share; 74 75#define PARALLEL 800 76#define RUNTIME (3 * 60) 77#define SYNC 0 78#define ACT 1 79 80static void 81handler(int i __unused) { 82 _exit(0); 83} 84 85static void 86test(void) 87{ 88 struct kevent ev[2]; 89 struct timespec ts; 90 time_t start; 91 int kq, ret; 92 93 signal(SIGUSR1, handler); 94 (void)atomic_fetch_add(&share[SYNC], 1); 95 while (atomic_load(&share[SYNC]) != PARALLEL) 96 usleep(1); 97 (void)atomic_fetch_add(&share[ACT], 1); 98 99 if ((kq = kqueue()) < 0) 100 err(1, "kqueue"); 101 102 EV_SET(&ev[0], 42, EVFILT_TIMER, EV_ADD | EV_ENABLE | EV_ONESHOT, 0, 103 0, 0); 104 105 start = time(NULL); 106 while (time(NULL) - start < 30) { 107 ts.tv_sec = 0; 108 ts.tv_nsec = arc4random() % 2000; 109 if ((ret = kevent(kq, &ev[0], 1, &ev[1], 1, &ts)) == -1) 110 err(1, "kevent"); 111 if (ret == 1 && (ev[1].flags & EV_ERROR) != 0) 112 errc(1, ev[1].data, "kevent"); 113 } 114 115 _exit(0); 116} 117 118int 119main(void) 120{ 121 pid_t pids[PARALLEL]; 122 size_t len; 123 time_t start; 124 int i, status; 125 126 len = PAGE_SIZE; 127 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 128 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 129 err(1, "mmap"); 130 131 start = time(NULL); 132 while ((time(NULL) - start) < RUNTIME) { 133 share[ACT] = share[SYNC] = 0; 134 for (i = 0; i < PARALLEL; i++) { 135 if ((pids[i] = fork()) == 0) 136 test(); 137 if (pids[i] == -1) 138 err(1, "fork()"); 139 } 140 while (share[ACT] != PARALLEL) 141 usleep(1); 142 usleep(arc4random() % 50000); 143 for (i = 0; i < PARALLEL; i++) { 144 if (kill(pids[i], SIGUSR1) == -1) 145 err(1, "kill"); 146 } 147 148 for (i = 0; i < PARALLEL; i++) { 149 if (waitpid(pids[i], &status, 0) == -1) 150 err(1, "waitpid(%d)", pids[i]); 151 if (status != 0) { 152 if (WIFSIGNALED(status) && WTERMSIG(status) != 2) 153 fprintf(stderr, 154 "pid %d exit signal %d\n", 155 pids[i], WTERMSIG(status)); 156 } 157 } 158 } 159 160 return (0); 161} 162