h_atexit.c revision 274626 
1/* $NetBSD: h_atexit.c,v 1.1 2010/07/16 15:42:53 jmmv 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/*
30 * Program to test atexit(3) and __cxa_atexit()/__cxa_finalize().
31 *
32 * Written by Jason R. Thorpe, February 2003.
33 * Public domain.
34 */
35
36#include <sys/cdefs.h>
37__COPYRIGHT("@(#) Copyright (c) 2008\
38 The NetBSD Foundation, inc. All rights reserved.");
39__RCSID("$NetBSD: h_atexit.c,v 1.1 2010/07/16 15:42:53 jmmv Exp $");
40
41#include <stdio.h>
42#include <stdlib.h>
43#include <signal.h>
44#include <string.h>
45#include <unistd.h>
46
47extern int __cxa_atexit(void (*func)(void *), void *, void *);
48extern void __cxa_finalize(void *);
49
50#ifdef __FreeBSD__
51/*
52 * See comments in ../../lib/libc/stdlib/h_atexit.c about the deviation
53 * between FreeBSD and NetBSD with this helper program
54 */
55static void *dso_handle_1 = (void *)1;
56static void *dso_handle_2 = (void *)2;
57static void *dso_handle_3 = (void *)3;
58#else
59static int dso_handle_1;
60static int dso_handle_2;
61static int dso_handle_3;
62#endif
63
64static int arg_1;
65static int arg_2;
66static int arg_3;
67
68static int exiting_state;
69
70#define    ASSERT(expr)                                     \
71do {                                                        \
72	if ((expr) == 0) {                                      \
73		write(STDERR_FILENO, __func__, strlen(__func__));   \
74		write(STDERR_FILENO, ": ", 2);                      \
75		write(STDERR_FILENO, __STRING(expr),                \
76			  strlen(__STRING(expr)));                      \
77		write(STDERR_FILENO, "\n", 1);                      \
78		my_abort();                                         \
79	}                                                       \
80} while (/*CONSTCOND*/0)
81
82#define    SUCCESS()                                        \
83do {                                                        \
84	write(STDOUT_FILENO, __func__, strlen(__func__));       \
85	write(STDOUT_FILENO, "\n", 1);                          \
86} while (/*CONSTCOND*/0)
87
88static void
89my_abort(void)
90{
91
92	kill(getpid(), SIGABRT);
93	/* NOTREACHED */
94}
95
96static void
97cxa_handler_5(void *arg)
98{
99	static int cxa_handler_5_called;
100
101	ASSERT(arg == (void *)&arg_1);
102	ASSERT(cxa_handler_5_called == 0);
103	ASSERT(exiting_state == 5);
104
105	exiting_state--;
106	cxa_handler_5_called = 1;
107	SUCCESS();
108}
109
110static void
111cxa_handler_4(void *arg)
112{
113	static int cxa_handler_4_called;
114
115	ASSERT(arg == (void *)&arg_1);
116	ASSERT(cxa_handler_4_called == 0);
117	ASSERT(exiting_state == 4);
118
119	exiting_state--;
120	cxa_handler_4_called = 1;
121	SUCCESS();
122}
123
124static void
125cxa_handler_3(void *arg)
126{
127	static int cxa_handler_3_called;
128
129	ASSERT(arg == (void *)&arg_2);
130	ASSERT(cxa_handler_3_called == 0);
131	ASSERT(exiting_state == 3);
132
133	exiting_state--;
134	cxa_handler_3_called = 1;
135	SUCCESS();
136}
137
138static void
139cxa_handler_2(void *arg)
140{
141	static int cxa_handler_2_called;
142
143	ASSERT(arg == (void *)&arg_3);
144	ASSERT(cxa_handler_2_called == 0);
145	ASSERT(exiting_state == 2);
146
147	exiting_state--;
148	cxa_handler_2_called = 1;
149	SUCCESS();
150}
151
152static void
153normal_handler_1(void)
154{
155	static int normal_handler_1_called;
156
157	ASSERT(normal_handler_1_called == 0);
158	ASSERT(exiting_state == 1);
159
160	exiting_state--;
161	normal_handler_1_called = 1;
162	SUCCESS();
163}
164
165static void
166normal_handler_0(void)
167{
168	static int normal_handler_0_called;
169
170	ASSERT(normal_handler_0_called == 0);
171	ASSERT(exiting_state == 0);
172
173	normal_handler_0_called = 1;
174	SUCCESS();
175}
176
177int
178main(int argc, char *argv[])
179{
180
181	exiting_state = 5;
182
183#ifdef __FreeBSD__
184	ASSERT(0 == atexit(normal_handler_0));
185	ASSERT(0 == atexit(normal_handler_1));
186	ASSERT(0 == __cxa_atexit(cxa_handler_4, &arg_1, dso_handle_1));
187	ASSERT(0 == __cxa_atexit(cxa_handler_5, &arg_1, dso_handle_1));
188	ASSERT(0 == __cxa_atexit(cxa_handler_3, &arg_2, dso_handle_2));
189	ASSERT(0 == __cxa_atexit(cxa_handler_2, &arg_3, dso_handle_3));
190
191	__cxa_finalize(dso_handle_1);
192	__cxa_finalize(dso_handle_2);
193#else
194	ASSERT(0 == __cxa_atexit(cxa_handler_4, &arg_1, &dso_handle_1));
195	ASSERT(0 == __cxa_atexit(cxa_handler_5, &arg_1, &dso_handle_1));
196	ASSERT(0 == __cxa_atexit(cxa_handler_3, &arg_2, &dso_handle_2));
197	ASSERT(0 == __cxa_atexit(cxa_handler_2, &arg_3, &dso_handle_3));
198
199	__cxa_finalize(&dso_handle_1);
200	__cxa_finalize(&dso_handle_2);
201#endif
202	exit(0);
203}
204