1 /*
2 * Copyright (C) 2020 The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <gtest/gtest.h>
30
31 extern "C" {
32 int __cxa_atexit(void (*func)(void*), void* arg, void* dso);
33
34 // TODO(b/175635923). __cxa_finalize's return type should actually be "void",
35 // but it is declared "int" here instead to be compatible with the declaration
36 // in an old version of cxxabi.h, which is included indirectly. The declarations
37 // of __cxa_atexit and __cxa_finalize are removed from newer versions of
38 // cxxabi.h, so once libc++ is updated, this return type should be changed to
39 // "void".
40 int __cxa_finalize(void* dso);
41 }
42
TEST(__cxa_atexit,simple)43 TEST(__cxa_atexit, simple) {
44 int counter = 0;
45
46 __cxa_atexit([](void* arg) { ++*static_cast<int*>(arg); }, &counter, &counter);
47
48 __cxa_finalize(&counter);
49 ASSERT_EQ(counter, 1);
50
51 // The handler won't be called twice.
52 __cxa_finalize(&counter);
53 ASSERT_EQ(counter, 1);
54 }
55
TEST(__cxa_atexit,order)56 TEST(__cxa_atexit, order) {
57 static std::vector<int> actual;
58
59 char handles[2];
60
61 auto append_to_actual = [](void* arg) {
62 int* idx = static_cast<int*>(arg);
63 actual.push_back(*idx);
64 delete idx;
65 };
66
67 for (int i = 0; i < 500; ++i) {
68 __cxa_atexit(append_to_actual, new int{i}, &handles[i % 2]);
69 }
70
71 __cxa_finalize(&handles[0]);
72
73 for (int i = 500; i < 750; ++i) {
74 __cxa_atexit(append_to_actual, new int{i}, &handles[1]);
75 }
76
77 __cxa_finalize(&handles[1]);
78
79 std::vector<int> expected;
80 for (int i = 498; i >= 0; i -= 2) expected.push_back(i);
81 for (int i = 749; i >= 500; --i) expected.push_back(i);
82 for (int i = 499; i >= 1; i -= 2) expected.push_back(i);
83
84 ASSERT_EQ(expected.size(), actual.size());
85 for (size_t i = 0; i < expected.size(); ++i) {
86 ASSERT_EQ(expected[i], actual[i]) << "index=" << i;
87 }
88 }
89