diff options
Diffstat (limited to 'contrib/netbsd-tests/kernel/t_filedesc.c')
-rw-r--r-- | contrib/netbsd-tests/kernel/t_filedesc.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/kernel/t_filedesc.c b/contrib/netbsd-tests/kernel/t_filedesc.c new file mode 100644 index 0000000..6b367ee --- /dev/null +++ b/contrib/netbsd-tests/kernel/t_filedesc.c @@ -0,0 +1,108 @@ +/* $NetBSD: t_filedesc.c,v 1.5 2012/03/18 09:46:50 jruoho Exp $ */ + +/*- + * Copyright (c) 2010 The NetBSD Foundation, Inc. + * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +#include <sys/cdefs.h> +__RCSID("$NetBSD: t_filedesc.c,v 1.5 2012/03/18 09:46:50 jruoho Exp $"); + +#include <sys/types.h> + +#include <assert.h> +#include <atf-c.h> +#include <fcntl.h> +#include <stdlib.h> +#include <pthread.h> + +#include <rump/rump.h> +#include <rump/rump_syscalls.h> + +#include "../h_macros.h" + +ATF_TC(getfilerace); +ATF_TC_HEAD(getfilerace, tc) +{ + + atf_tc_set_md_var(tc, "descr", "race between multithreaded proc. " + "fd_getfile() and fd_close() (PR kern/43694)"); +} + +static int fd; +static volatile bool quit; + +static void * +wrkwrk(void *arg) +{ + + /* just something to cause fd_getfile() to be called */ + while (!quit) + rump_sys_write(fd, &fd, sizeof(fd)); + + return NULL; +} + +/* for me, 1000 triggers extremely seldom, 10k sometimes, 100k almost always */ +#define DEFAULT_ITERATIONS 10000 + +ATF_TC_BODY(getfilerace, tc) +{ + pthread_t pt; + int fd_wrk; + int i, iters; + + /* + * Want a multiprocessor virtual kernel. A multiprocessor host + * probably helps too, but that's harder to do in software... + */ + setenv("RUMP_NCPU", "2", 1); + rump_init(); + + fd = fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0); + if (fd == -1) + atf_tc_fail_errno("cannot open /dev/null"); + + if (atf_tc_has_config_var(tc, "iters")) + iters = atoi(atf_tc_get_config_var(tc, "iters")); + else + iters = DEFAULT_ITERATIONS; + + pthread_create(&pt, NULL, wrkwrk, NULL); + for (i = 0; i < iters; i++) { + rump_sys_close(fd_wrk); + fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0); + assert(fd == fd_wrk); + } + + quit = true; + pthread_join(pt, NULL); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, getfilerace); + + return atf_no_error(); +} |