1/* $NetBSD: t_swapcontext.c,v 1.9 2018/02/28 21:36:50 uwe Exp $ */
2
3/*
4 * Copyright (c) 2012 Emmanuel Dreyfus. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__RCSID("$NetBSD: t_swapcontext.c,v 1.9 2018/02/28 21:36:50 uwe Exp $");
30
31#include <sys/types.h>
32#include <errno.h>
33#include <pthread.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <ucontext.h>
38
39#include <atf-c.h>
40
41#include "h_common.h"
42
43#define STACKSIZE 65536
44
45char stack[STACKSIZE];
46ucontext_t nctx;
47ucontext_t octx;
48void *oself;
49void *nself;
50int val1, val2;
51
52static void
53swapfunc(void)
54{
55	/*
56	 * If the test fails, we are very likely to crash
57	 * without the opportunity to report
58	 */
59	nself = (void *)pthread_self();
60	printf("after swapcontext self = %p\n", nself);
61
62	ATF_REQUIRE_EQ(oself, nself);
63	printf("Test succeeded\n");
64}
65
66/* ARGSUSED0 */
67static void *
68threadfunc(void *arg)
69{
70	nctx.uc_stack.ss_sp = stack;
71	nctx.uc_stack.ss_size = sizeof(stack);
72	nctx.uc_link = &octx;
73
74	makecontext(&nctx, swapfunc, 0);
75
76	oself = (void *)pthread_self();
77	printf("before swapcontext self = %p\n", oself);
78	ATF_REQUIRE_MSG(swapcontext(&octx, &nctx) != -1, "swapcontext failed: %s",
79	    strerror(errno));
80
81	return NULL;
82}
83
84
85ATF_TC(swapcontext1);
86ATF_TC_HEAD(swapcontext1, tc)
87{
88	atf_tc_set_md_var(tc, "descr", "Testing if swapcontext() "
89	    "alters pthread_self()");
90}
91ATF_TC_BODY(swapcontext1, tc)
92{
93	pthread_t thread;
94
95	oself = (void *)&val1;
96	nself = (void *)&val2;
97
98	printf("Testing if swapcontext() alters pthread_self()\n");
99
100	ATF_REQUIRE_MSG(getcontext(&nctx) != -1, "getcontext failed: %s",
101	    strerror(errno));
102	PTHREAD_REQUIRE(pthread_create(&thread, NULL, threadfunc, NULL));
103	PTHREAD_REQUIRE(pthread_join(thread, NULL));
104}
105
106ATF_TP_ADD_TCS(tp)
107{
108	ATF_TP_ADD_TC(tp, swapcontext1);
109
110	return atf_no_error();
111}
112