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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