cxa_thread_atexit_test.cc revision 304527 
1/*-
2 * Copyright (c) 2016 Mahdi Mokhtari <mokhi64@gmail.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/lib/libc/tests/stdlib/cxa_thread_atexit_test.cc 304527 2016-08-20 12:26:44Z kib $");
29
30#include <dlfcn.h>
31#include <atf-c++.hpp>
32#include <cstdio>
33#include <cstdlib>
34#include <thread>
35
36static FILE *output = NULL;
37
38struct Foo {
39	Foo() { ATF_REQUIRE(fprintf(output, "Created\n") > 0); }
40	~Foo() { ATF_REQUIRE(fprintf(output, "Destroyed\n") > 0); }
41	void use() { ATF_REQUIRE(fprintf(output, "Used\n") > 0); }
42};
43
44struct Bar {
45	Bar() {}
46	~Bar() {
47		thread_local static Foo foo;
48		ATF_REQUIRE(fprintf(output, "DIED\n") > 0);
49	}
50	void use() {}
51};
52
53extern "C" int __cxa_thread_atexit(void (*)(void *), void *, void *);
54
55static void
56again(void *arg)
57{
58
59	__cxa_thread_atexit(again, arg, &output);
60}
61
62struct Baz {
63	Baz() {}
64	~Baz() {
65		again(NULL);
66	}
67	void use() {}
68};
69
70static thread_local Foo f;
71static thread_local Foo g;
72static thread_local Bar h;
73static thread_local Baz e;
74
75/*
76 * This test must be linked to libpthread.
77 */
78ATF_TEST_CASE_WITHOUT_HEAD(cxx__thr);
79ATF_TEST_CASE_BODY(cxx__thr)
80{
81	void *libthr_handle;
82
83	/* Avoid coredump during f construction. */
84	output = stderr;
85
86	libthr_handle = dlopen("libthr.so.3", RTLD_LAZY | RTLD_GLOBAL |
87	    RTLD_NOLOAD);
88	ATF_REQUIRE(libthr_handle != NULL);
89	dlclose(libthr_handle);
90}
91
92/*
93 * In this test f.use() will test cxa_thread_atexit() in non-threaded mode.
94 * After f.use() main will be threaded and we'll have one additional thread
95 * with its own TLS data.
96 */
97ATF_TEST_CASE_WITHOUT_HEAD(cxx__thread_local_before);
98ATF_TEST_CASE_BODY(cxx__thread_local_before)
99{
100	static const char out_log[] = "Created\nCreated\nUsed\nCreated\n"
101	    "Created\nUsed\nCreated\nDIED\nDestroyed\nDestroyed\nDestroyed\n";
102
103	ATF_REQUIRE((output = fopen("test_before.txt", "w")) != NULL);
104
105	f.use();
106	std::thread t([]() { f.use(); });
107	t.join();
108
109	fflush(output);
110
111	ATF_REQUIRE(atf::utils::compare_file("test_before.txt", out_log));
112}
113
114/*
115 * In this test, f.use() will test __cxa_thread_atexit()
116 * in threaded mode (but still in main-threaed).
117 */
118ATF_TEST_CASE_WITHOUT_HEAD(cxx__thread_local_after);
119ATF_TEST_CASE_BODY(cxx__thread_local_after)
120{
121	static const char out_log[] = "Created\nCreated\nUsed\nCreated\n"
122	    "DIED\nDestroyed\nDestroyed\nDestroyed\nCreated\nCreated\nUsed\n";
123
124	ATF_REQUIRE((output = fopen("test_after.txt", "w")) != NULL);
125
126	std::thread t([]() { g.use(); });
127	t.join();
128	sleep(1);
129	g.use();
130
131	fflush(output);
132
133	ATF_REQUIRE(atf::utils::compare_file("test_after.txt", out_log));
134}
135
136/*
137 * In this test, we register a new dtor while dtors are being run
138 * in __cxa_thread_atexit().
139 */
140ATF_TEST_CASE_WITHOUT_HEAD(cxx__thread_local_add_while_calling_dtors);
141ATF_TEST_CASE_BODY(cxx__thread_local_add_while_calling_dtors)
142{
143	static const char out_log[] = "Created\nCreated\nCreated\nDIED\n"
144	    "Destroyed\nDestroyed\nDestroyed\n";
145
146	ATF_REQUIRE((output = fopen("test_add_meanwhile.txt", "w")) != NULL);
147
148	std::thread t([]() { h.use(); });
149	t.join();
150	sleep(1);
151
152	fflush(output);
153
154	ATF_REQUIRE(atf::utils::compare_file("test_add_meanwhile.txt", out_log));
155}
156
157ATF_TEST_CASE_WITHOUT_HEAD(cxx__thread_inf_dtors);
158ATF_TEST_CASE_BODY(cxx__thread_inf_dtors)
159{
160
161	/*
162	 * Only added to make isolated run of this test not
163	 * coredumping.  Construction of Foo objects require filled
164	 * output.
165	 */
166	output = stderr;
167
168	std::thread t([]() { e.use(); });
169	t.join();
170}
171
172ATF_INIT_TEST_CASES(tcs)
173{
174
175	ATF_ADD_TEST_CASE(tcs, cxx__thr);
176	ATF_ADD_TEST_CASE(tcs, cxx__thread_local_before);
177	ATF_ADD_TEST_CASE(tcs, cxx__thread_local_after);
178	ATF_ADD_TEST_CASE(tcs, cxx__thread_local_add_while_calling_dtors);
179	ATF_ADD_TEST_CASE(tcs, cxx__thread_inf_dtors);
180}
181