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Annotation of src/tests/kernel/t_filedesc.c, Revision 1.5

1.5     ! jruoho      1: /*     $NetBSD: t_filedesc.c,v 1.4 2010/11/03 16:10:20 christos Exp $  */
1.1       pooka       2:
                      3: /*-
                      4:  * Copyright (c) 2010 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
                     15:  *
                     16:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     17:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     18:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     19:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     20:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     21:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     22:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     23:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     24:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     25:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     26:  * POSSIBILITY OF SUCH DAMAGE.
                     27:  */
                     28:
                     29: #include <sys/cdefs.h>
1.5     ! jruoho     30: __RCSID("$NetBSD: t_filedesc.c,v 1.4 2010/11/03 16:10:20 christos Exp $");
1.1       pooka      31:
                     32: #include <sys/types.h>
                     33:
                     34: #include <assert.h>
                     35: #include <atf-c.h>
                     36: #include <fcntl.h>
                     37: #include <stdlib.h>
1.4       christos   38: #include <pthread.h>
1.1       pooka      39:
                     40: #include <rump/rump.h>
                     41: #include <rump/rump_syscalls.h>
                     42:
                     43: #include "../h_macros.h"
                     44:
                     45: ATF_TC(getfilerace);
                     46: ATF_TC_HEAD(getfilerace, tc)
                     47: {
                     48:
                     49:        atf_tc_set_md_var(tc, "descr", "race between multithreaded proc. "
1.5     ! jruoho     50:            "fd_getfile() and fd_close() (PR kern/43694)");
1.1       pooka      51: }
                     52:
                     53: static int fd;
                     54: static volatile bool quit;
                     55:
                     56: static void *
                     57: wrkwrk(void *arg)
                     58: {
                     59:
                     60:        /* just something to cause fd_getfile() to be called */
                     61:        while (!quit)
                     62:                rump_sys_write(fd, &fd, sizeof(fd));
                     63:
                     64:        return NULL;
                     65: }
                     66:
                     67: /* for me, 1000 triggers extremely seldom, 10k sometimes, 100k almost always */
                     68: #define DEFAULT_ITERATIONS 10000
                     69:
                     70: ATF_TC_BODY(getfilerace, tc)
                     71: {
                     72:        pthread_t pt;
                     73:        int fd_wrk;
                     74:        int i, iters;
                     75:
                     76:        /*
                     77:         * Want a multiprocessor virtual kernel.  A multiprocessor host
                     78:         * probably helps too, but that's harder to do in software...
                     79:         */
                     80:        setenv("RUMP_NCPU", "2", 1);
                     81:        rump_init();
                     82:
                     83:        fd = fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0);
                     84:        if (fd == -1)
                     85:                atf_tc_fail_errno("cannot open /dev/null");
                     86:
                     87:        if (atf_tc_has_config_var(tc, "iters"))
                     88:                iters = atoi(atf_tc_get_config_var(tc, "iters"));
                     89:        else
                     90:                iters = DEFAULT_ITERATIONS;
                     91:
                     92:        pthread_create(&pt, NULL, wrkwrk, NULL);
                     93:        for (i = 0; i < iters; i++) {
                     94:                rump_sys_close(fd_wrk);
                     95:                fd_wrk = rump_sys_open("/dev/null", O_RDWR, 0);
                     96:                assert(fd == fd_wrk);
                     97:        }
                     98:
                     99:        quit = true;
                    100:        pthread_join(pt, NULL);
                    101: }
                    102:
                    103: ATF_TP_ADD_TCS(tp)
                    104: {
                    105:        ATF_TP_ADD_TC(tp, getfilerace);
                    106:
                    107:        return atf_no_error();
                    108: }

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