#!/bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# No problems seen.
. ../default.cfg
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/kevent15.c
mycc -o kevent15 -Wall -Wextra -O0 -g kevent15.c || exit 1
rm -f kevent15.c
cd $odir
(cd ../testcases/swap; ./swap -t 3m -i 20 -l 80) &
sleep 2
cd $dir
timeout 5m ./kevent15
s=$?
while pkill swap; do sleep .1; done
wait
[ -f kevent15.core -a $s -eq 0 ] &&
{ ls -l kevent15.core; s=1; }
cd $odir
rm -rf $dir/kevent15
exit $s
EOF
#include <sys/param.h>
#include <sys/event.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
static _Atomic(int) *share;
#define PARALLEL 800
#define RUNTIME (3 * 60)
#define SYNC 0
#define ACT 1
static void
handler(int i __unused) {
_exit(0);
}
static void
test(void)
{
struct kevent ev[2];
struct timespec ts;
time_t start;
int kq, ret;
signal(SIGUSR1, handler);
(void)atomic_fetch_add(&share[SYNC], 1);
while (atomic_load(&share[SYNC]) != PARALLEL)
usleep(1);
(void)atomic_fetch_add(&share[ACT], 1);
if ((kq = kqueue()) < 0)
err(1, "kqueue");
EV_SET(&ev[0], 42, EVFILT_TIMER, EV_ADD | EV_ENABLE | EV_ONESHOT, 0,
0, 0);
start = time(NULL);
while (time(NULL) - start < 30) {
ts.tv_sec = 0;
ts.tv_nsec = arc4random() % 2000;
if ((ret = kevent(kq, &ev[0], 1, &ev[1], 1, &ts)) == -1)
err(1, "kevent");
if (ret == 1 && (ev[1].flags & EV_ERROR) != 0)
errc(1, ev[1].data, "kevent");
}
_exit(0);
}
int
main(void)
{
pid_t pids[PARALLEL];
size_t len;
time_t start;
int i, status;
len = PAGE_SIZE;
if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap");
start = time(NULL);
while ((time(NULL) - start) < RUNTIME) {
share[ACT] = share[SYNC] = 0;
for (i = 0; i < PARALLEL; i++) {
if ((pids[i] = fork()) == 0)
test();
if (pids[i] == -1)
err(1, "fork()");
}
while (share[ACT] != PARALLEL)
usleep(1);
usleep(arc4random() % 50000);
for (i = 0; i < PARALLEL; i++) {
if (kill(pids[i], SIGUSR1) == -1)
err(1, "kill");
}
for (i = 0; i < PARALLEL; i++) {
if (waitpid(pids[i], &status, 0) == -1)
err(1, "waitpid(%d)", pids[i]);
if (status != 0) {
if (WIFSIGNALED(status) && WTERMSIG(status) != 2)
fprintf(stderr,
"pid %d exit signal %d\n",
pids[i], WTERMSIG(status));
}
}
}
return (0);
}
