svn commit: r349012 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Thu Jun 13 07:13:23 UTC 2019
Author: pho
Date: Thu Jun 13 07:13:22 2019
New Revision: 349012
URL: https://svnweb.freebsd.org/changeset/base/349012
Log:
Added a mmap(2) regression test.
Sponsored by: Dell EMC Isilon
Added:
user/pho/stress2/misc/mmap34.sh (contents, props changed)
Added: user/pho/stress2/misc/mmap34.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/mmap34.sh Thu Jun 13 07:13:22 2019 (r349012)
@@ -0,0 +1,232 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Dell EMC Isilon
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+# "panic: caller failed to provide space -546873344 at address 0x20a00000"
+# seen.
+# https://people.freebsd.org/~pho/stress/log/indir_trunc.txt
+# Fixed by r348968
+
+# Test scenario inspired by:
+# syzbot+6532e9aab8911f58beeb at syzkaller.appspotmail.com
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/mmap34.c
+mycc -o mmap34 -Wall -Wextra -O0 -g mmap34.c -lpthread || exit 1
+cd $odir
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 4g -u $mdstart
+newfs $newfs_flags -n md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+set +e
+
+(cd ../testcases/swap; ./swap -t 5m -i 20) &
+cd $mntpoint
+$dir/mmap34
+s=$?
+while pkill swap; do :; done
+wait
+[ -f mmap34.core ] &&
+ { ls -l mmap34.core; mv mmap34.core $dir; s=1; }
+cd $odir
+
+for i in `jot 6`; do
+ mount | grep -q "on $mntpoint " || break
+ umount $mntpoint && break || sleep 10
+ [ $i -eq 6 ] &&
+ { echo FATAL; fstat -mf $mntpoint; exit 1; }
+done
+mdconfig -d -u $mdstart
+rm -f $dir/mmap34
+[ $s -eq 0 ] && rm -f mmap34.c
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static volatile u_int *share;
+
+#if defined(__LP64__)
+#define MASK 0x7ffffffffffffULL
+#else
+#define MASK 0xffffffffULL
+#endif
+#define PARALLEL 64
+#define RUNTIME (5 * 60)
+#define SYNC 0
+
+static int fd;
+
+static void *
+t1(void *data __unused)
+{
+ off_t offset;
+ time_t start;
+
+ start = time(NULL);
+ while (time(NULL) - start < 30) {
+ offset = arc4random();
+ offset = (offset << 32) | arc4random();
+ offset &= MASK;
+ if (lseek(fd, offset, SEEK_SET) == -1)
+ err(1, "lseek(%jd)", offset);
+ if (write(fd, "a", 1) != 1)
+ err(1, "write");
+ if (fsync(fd) == -1)
+ err(1, "fsync");
+ usleep(100);
+ }
+ return (NULL);
+}
+static void *
+t2(void *data __unused)
+{
+ off_t offset, old;
+ time_t start;
+ void *p;
+ char *c;
+
+ old = 0;
+ start = time(NULL);
+ while (time(NULL) - start < 30) {
+ if (old != 0)
+ munmap(p, old);
+ offset = arc4random();
+ offset = (offset << 32) | arc4random();
+ offset &= MASK;
+ if (ftruncate(fd, offset) == -1)
+ err(1, "ftruncate(%jd)", offset);
+ write(fd, "b", 1);
+ p = mmap(NULL, offset, PROT_READ | PROT_WRITE, MAP_SHARED,
+ fd, 0);
+ if (p == MAP_FAILED)
+ old = 0;
+ else {
+ old = offset;
+ c = p;
+ c[offset / 2] = 1;
+ if (offset > 0)
+ c[offset - 1] = 2;
+ }
+ usleep(20000);
+ }
+ return (NULL);
+}
+
+static void
+test(void)
+{
+ pthread_t tid[2];
+ int r;
+ char file[80];
+
+ atomic_add_int(&share[SYNC], 1);
+ while (share[SYNC] != PARALLEL)
+ ;
+
+ snprintf(file, sizeof(file), "file.%d", getpid());
+ if ((fd = open(file, O_RDWR | O_CREAT, DEFFILEMODE)) == -1)
+ err(1, "open(%s)", file);
+
+ if ((r = pthread_create(&tid[0], NULL, t1, NULL)) != 0)
+ errc(1, r, "pthread_create");
+ if ((r = pthread_create(&tid[1], NULL, t2, NULL)) != 0)
+ errc(1, r, "pthread_create");
+
+ if ((r = pthread_join(tid[0], NULL)) != 0)
+ errc(1, r, "pthread_join");
+ if ((r = pthread_join(tid[1], NULL)) != 0)
+ errc(1, r, "pthread_join");
+ close(fd);
+ unlink(file);
+
+ _exit(0);
+}
+
+int
+main(void)
+{
+ pid_t pids[PARALLEL];
+ size_t len;
+ time_t start;
+ int e, i, status;
+
+ e = 0;
+ 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 && e == 0) {
+ share[SYNC] = 0;
+ for (i = 0; i < PARALLEL; i++) {
+ if ((pids[i] = fork()) == 0)
+ test();
+ if (pids[i] == -1)
+ err(1, "fork()");
+ }
+ 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))
+ fprintf(stderr,
+ "pid %d exit signal %d\n",
+ pids[i], WTERMSIG(status));
+ }
+ e += status == 0 ? 0 : 1;
+ }
+ }
+
+ return (e);
+}
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