Mercurial > illumos > illumos-gate
view usr/src/test/zfs-tests/cmd/mmapwrite/mmapwrite.c @ 13899:0bcf78798346
3311 Want a test framework for arbitrary OS unit tests
3312 Add a testrunner package for OS unit tests
3313 Add a testrunner package to convert ZFS tests from STF
Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com>
Reviewed by: Will Guyette <will.guyette@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Henrik Mattson <henrik.mattson@delphix.com>
Reviewed by: Sonu Pillai <sonu.pillai@delphix.com>
Reviewed by: Christopher Siden <chris.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Approved by: Richard Lowe <richlowe@richlowe.net>
author | John Wren Kennedy <john.kennedy@delphix.com> |
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date | Wed, 05 Dec 2012 22:04:50 -0500 |
parents | |
children |
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/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2007 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include <unistd.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <pthread.h> /* * -------------------------------------------------------------------- * Bug Id: 5032643 * * Simply writing to a file and mmaping that file at the same time can * result in deadlock. Nothing perverse like writing from the file's * own mapping is required. * -------------------------------------------------------------------- */ static void * mapper(void *fdp) { void *addr; int fd = *(int *)fdp; if ((addr = mmap(0, 8192, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) { perror("mmap"); exit(1); } for (;;) { if (mmap(addr, 8192, PROT_READ, MAP_SHARED|MAP_FIXED, fd, 0) == MAP_FAILED) { perror("mmap"); exit(1); } } /* NOTREACHED */ return ((void *)1); } int main(int argc, char **argv) { int fd; char buf[BUFSIZ]; if (argc != 2) { (void) printf("usage: %s <file name>\n", argv[0]); exit(1); } if ((fd = open(argv[1], O_RDWR|O_CREAT|O_TRUNC, 0666)) == -1) { perror("open"); exit(1); } if (pthread_create(NULL, NULL, mapper, &fd) != 0) { perror("pthread_create"); exit(1); } for (;;) { if (write(fd, buf, sizeof (buf)) == -1) { perror("write"); exit(1); } } /* NOTREACHED */ return (0); }