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Diffstat (limited to 'tools/test/stress2/misc/setrlimit2.sh')
| -rwxr-xr-x | tools/test/stress2/misc/setrlimit2.sh | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/setrlimit2.sh b/tools/test/stress2/misc/setrlimit2.sh new file mode 100755 index 000000000000..8c717fe72458 --- /dev/null +++ b/tools/test/stress2/misc/setrlimit2.sh @@ -0,0 +1,118 @@ +#!/bin/sh + +# +# SPDX-License-Identifier: BSD-2-Clause +# +# Copyright (c) 2022 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. +# + +# Demonstrate that a mapped SHARED file can be updated past LIMIT_FSIZE + +# Kostik wrote: +# This one should be reproducible when you +# - have file larger than e.g. RLIMIT_FSIZE +# - mmaped it without closing the file descriptor +# - dirty its pages beyond the limit +# - then unmap +# - then close the file descriptor. + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg + +cat > /tmp/setrlimit2.c <<EOF +#include <sys/param.h> +#include <sys/mman.h> +#include <sys/resource.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +static int signals; + +static void +handler(int sig __unused) +{ + signals++; +} + +int +main(int argc, char *argv[]) +{ + struct rlimit rlim; + struct sigaction act; + struct stat st; + size_t len; + int error, fd, ps; + char *file, *p; + + if (argc != 2) { + fprintf(stderr, "Usage: %s <data file>\n", argv[0]); + exit(1); + } + act.sa_handler = handler; + act.sa_flags = 0; + sigemptyset(&act.sa_mask); + if (sigaction(SIGXFSZ, &act, NULL) != 0) + err(1, "sigaction"); + + file = argv[1]; + ps = getpagesize(); + if ((fd = open(file, O_RDWR)) == -1) + err(1, "open(%s)", file); + if ((error = fstat(fd, &st)) == -1) + err(1, "stat(%s)", file); + len = round_page(st.st_size); + if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) + err(1, "mmap"); + rlim.rlim_cur = rlim.rlim_max = len / 2;; + if (setrlimit(RLIMIT_FSIZE, &rlim) == -1) + err(1, "setrlimit(%ld)", len / 2); + + p[len / 2 + ps] = 'a'; + + if (munmap(p, len) == -1) + err(1, "unmap()"); + close(fd); + +} +EOF +here=`pwd` +cd /tmp +mycc -o setrlimit2 -Wall -Wextra -O0 -g setrlimit2.c || exit 1 +data=/tmp/setrlimit2.data +dd if=/dev/zero of=$data bs=1m count=1 status=none +h1=`md5 < $data` + +./setrlimit2 $data + +h2=`md5 < $data` +rm -f /tmp/setrlimit2 /tmp/setrlimit2.c $data +[ $h1 = $h2 ] && exit 1 || exit 0 |