#!/bin/sh
#
# Copyright (c) 2016 EMC Corp.
# All rights reserved.
#
# 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.
#
# Looping thread seen:
# https://people.freebsd.org/~pho/stress/log/kostik855.txt
# Fixed by r293197.
# Again on i386:
# https://people.freebsd.org/~pho/stress/log/kostik867.txt
# Fixed by r295716.
. ../default.cfg
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > posix_fadvise3.c
mycc -o posix_fadvise3 -Wall -Wextra -O2 -g posix_fadvise3.c
data=/tmp/posix_fadvise3.data
dd if=/dev/zero of=$data bs=1m count=64 status=none
/tmp/posix_fadvise3
rm $data
truncate -s 64m $data
/tmp/posix_fadvise3
rm -f /tmp/posix_fadvise3 posix_fadvise3.c $data
exit
EOF
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define LOOPS 10000
#define N (128 * 1024 / (int)sizeof(u_int32_t))
u_int32_t r[N];
unsigned long
makearg(void)
{
unsigned int i;
unsigned long val;
val = arc4random();
i = arc4random() % 100;
if (i < 20)
val = val & 0xff;
if (i >= 20 && i < 40)
val = val & 0xffff;
if (i >= 40 && i < 60)
val = (unsigned long)(r) | (val & 0xffff);
#if defined(__LP64__)
if (i >= 60) {
val = (val << 32) | arc4random();
if (i > 80)
val = val & 0x00007fffffffffffUL;
}
#endif
return(val);
}
int
main(void)
{
off_t len, offset;
int advise, fd, i, j;
if ((fd = open("/tmp/posix_fadvise3.data", O_RDONLY)) == -1)
err(1, "open()");
offset = 0;
len = 0x7fffffffffffffff;
advise = 4;
if (posix_fadvise(fd, offset, len, advise) == -1)
warn("posix_fadvise");
close(fd);
for (i = 0; i < LOOPS; i++) {
for (j = 0; j < N; j++)
r[j] = arc4random();
if ((fd = open("/tmp/posix_fadvise3.data", O_RDONLY)) == -1)
err(1, "open()");
offset = makearg();
len = makearg();
advise = arc4random() % 6;
if (posix_fadvise(fd, offset, len, advise) == -1)
warn("posix_fadvise");
close(fd);
}
return (0);
}
