t_getcontext.c revision 275033 
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#else
57	for (i = 0; i < 9; i++) {
58#endif
59		ia = va_arg(va, int);
60		ATF_REQUIRE_EQ(i, ia);
61	}
62	va_end(va);
63
64	calls++;
65}
66
67ATF_TC(getcontext_err);
68ATF_TC_HEAD(getcontext_err, tc)
69{
70	atf_tc_set_md_var(tc, "descr", "Test errors from getcontext(2)");
71}
72
73ATF_TC_BODY(getcontext_err, tc)
74{
75
76	errno = 0;
77	ATF_REQUIRE_ERRNO(EFAULT, getcontext((void *)-1) == -1);
78}
79
80ATF_TC(setcontext_err);
81ATF_TC_HEAD(setcontext_err, tc)
82{
83	atf_tc_set_md_var(tc, "descr", "Test errors from setcontext(2)");
84}
85
86ATF_TC_BODY(setcontext_err, tc)
87{
88
89	errno = 0;
90	ATF_REQUIRE_ERRNO(EFAULT, setcontext((void *)-1) == -1);
91}
92
93ATF_TC(setcontext_link);
94ATF_TC_HEAD(setcontext_link, tc)
95{
96
97	atf_tc_set_md_var(tc, "descr",
98	"Checks get/make/setcontext(), context linking via uc_link(), "
99	    "and argument passing to the new context");
100}
101
102ATF_TC_BODY(setcontext_link, tc)
103{
104	ucontext_t uc[DEPTH];
105	ucontext_t save;
106	volatile int i = 0; /* avoid longjmp clobbering */
107
108	for (i = 0; i < DEPTH; ++i) {
109		ATF_REQUIRE_EQ(getcontext(&uc[i]), 0);
110
111		uc[i].uc_stack.ss_sp = malloc(STACKSZ);
112		uc[i].uc_stack.ss_size = STACKSZ;
113		uc[i].uc_link = (i > 0) ? &uc[i - 1] : &save;
114
115#if defined(__FreeBSD__) && defined(__amd64__)
116		/* FreeBSD/amd64 only permits up to 6 arguments. */
117		makecontext(&uc[i], (void *)run, 6, i,
118			0, 1, 2, 3, 4);
119#else
120		makecontext(&uc[i], (void *)run, 10, i,
121			0, 1, 2, 3, 4, 5, 6, 7, 8);
122#endif
123	}
124
125	ATF_REQUIRE_EQ(getcontext(&save), 0);
126
127	if (calls == 0)
128		ATF_REQUIRE_EQ(setcontext(&uc[DEPTH-1]), 0);
129}
130
131ATF_TP_ADD_TCS(tp)
132{
133
134	ATF_TP_ADD_TC(tp, getcontext_err);
135	ATF_TP_ADD_TC(tp, setcontext_err);
136	ATF_TP_ADD_TC(tp, setcontext_link);
137
138	return atf_no_error();
139}
140