t_getcontext.c revision 313498 
1/* $NetBSD: t_getcontext.c,v 1.3 2011/07/14 04:59:14 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2008 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>
30__COPYRIGHT("@(#) Copyright (c) 2008\
31 The NetBSD Foundation, inc. All rights reserved.");
32__RCSID("$NetBSD: t_getcontext.c,v 1.3 2011/07/14 04:59:14 jruoho Exp $");
33
34#include <atf-c.h>
35#include <errno.h>
36#include <stdarg.h>
37#include <stdlib.h>
38#include <ucontext.h>
39
40#define STACKSZ (10*1024)
41#define DEPTH 3
42
43static int calls;
44
45static void
46run(int n, ...)
47{
48	va_list va;
49	int i, ia;
50
51	ATF_REQUIRE_EQ(n, DEPTH - calls - 1);
52
53	va_start(va, n);
54#if defined(__FreeBSD__) && defined(__amd64__)
55	for (i = 0; i < 5; i++) {
56#elif defined(__FreeBSD__) && defined(__mips__)
57	for (i = 0; i < 5; i++) {
58#else
59	for (i = 0; i < 9; i++) {
60#endif
61		ia = va_arg(va, int);
62		ATF_REQUIRE_EQ(i, ia);
63	}
64	va_end(va);
65
66	calls++;
67}
68
69ATF_TC(getcontext_err);
70ATF_TC_HEAD(getcontext_err, tc)
71{
72	atf_tc_set_md_var(tc, "descr", "Test errors from getcontext(2)");
73}
74
75ATF_TC_BODY(getcontext_err, tc)
76{
77
78	errno = 0;
79	ATF_REQUIRE_ERRNO(EFAULT, getcontext((void *)-1) == -1);
80}
81
82ATF_TC(setcontext_err);
83ATF_TC_HEAD(setcontext_err, tc)
84{
85	atf_tc_set_md_var(tc, "descr", "Test errors from setcontext(2)");
86}
87
88ATF_TC_BODY(setcontext_err, tc)
89{
90
91	errno = 0;
92	ATF_REQUIRE_ERRNO(EFAULT, setcontext((void *)-1) == -1);
93}
94
95ATF_TC(setcontext_link);
96ATF_TC_HEAD(setcontext_link, tc)
97{
98
99	atf_tc_set_md_var(tc, "descr",
100	"Checks get/make/setcontext(), context linking via uc_link(), "
101	    "and argument passing to the new context");
102}
103
104ATF_TC_BODY(setcontext_link, tc)
105{
106	ucontext_t uc[DEPTH];
107	ucontext_t save;
108	volatile int i = 0; /* avoid longjmp clobbering */
109
110	for (i = 0; i < DEPTH; ++i) {
111		ATF_REQUIRE_EQ(getcontext(&uc[i]), 0);
112
113		uc[i].uc_stack.ss_sp = malloc(STACKSZ);
114		uc[i].uc_stack.ss_size = STACKSZ;
115		uc[i].uc_link = (i > 0) ? &uc[i - 1] : &save;
116
117#if defined(__FreeBSD__) && defined(__amd64__)
118		/* FreeBSD/amd64 only permits up to 6 arguments. */
119		makecontext(&uc[i], (void *)run, 6, i,
120			0, 1, 2, 3, 4);
121#elif defined(__FreeBSD__) && defined(__mips__)
122		/* FreeBSD/mips only permits up to 6 arguments. */
123		makecontext(&uc[i], (void *)run, 6, i,
124			0, 1, 2, 3, 4);
125#else
126		makecontext(&uc[i], (void *)run, 10, i,
127			0, 1, 2, 3, 4, 5, 6, 7, 8);
128#endif
129	}
130
131	ATF_REQUIRE_EQ(getcontext(&save), 0);
132
133	if (calls == 0)
134		ATF_REQUIRE_EQ(setcontext(&uc[DEPTH-1]), 0);
135}
136
137ATF_TP_ADD_TCS(tp)
138{
139
140	ATF_TP_ADD_TC(tp, getcontext_err);
141	ATF_TP_ADD_TC(tp, setcontext_err);
142	ATF_TP_ADD_TC(tp, setcontext_link);
143
144	return atf_no_error();
145}
146