1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include <gtest/gtest.h>
17
18#include <dlfcn.h>
19
20#include "utils.h"
21
22static int g_atfork_prepare_calls = 0;
23static void AtForkPrepare1() { g_atfork_prepare_calls = (g_atfork_prepare_calls * 10) + 1; }
24static void AtForkPrepare2() { g_atfork_prepare_calls = (g_atfork_prepare_calls * 10) + 2; }
25static void AtForkPrepare3() { g_atfork_prepare_calls = (g_atfork_prepare_calls * 10) + 3; }
26static void AtForkPrepare4() { g_atfork_prepare_calls = (g_atfork_prepare_calls * 10) + 4; }
27
28static int g_atfork_parent_calls = 0;
29static void AtForkParent1() { g_atfork_parent_calls = (g_atfork_parent_calls * 10) + 1; }
30static void AtForkParent2() { g_atfork_parent_calls = (g_atfork_parent_calls * 10) + 2; }
31static void AtForkParent3() { g_atfork_parent_calls = (g_atfork_parent_calls * 10) + 3; }
32static void AtForkParent4() { g_atfork_parent_calls = (g_atfork_parent_calls * 10) + 4; }
33
34static int g_atfork_child_calls = 0;
35static void AtForkChild1() { g_atfork_child_calls = (g_atfork_child_calls * 10) + 1; }
36static void AtForkChild2() { g_atfork_child_calls = (g_atfork_child_calls * 10) + 2; }
37static void AtForkChild3() { g_atfork_child_calls = (g_atfork_child_calls * 10) + 3; }
38static void AtForkChild4() { g_atfork_child_calls = (g_atfork_child_calls * 10) + 4; }
39
40TEST(pthread, pthread_atfork_with_dlclose) {
41  ASSERT_EQ(0, pthread_atfork(AtForkPrepare1, AtForkParent1, AtForkChild1));
42
43  void* handle = dlopen("libtest_pthread_atfork.so", RTLD_NOW | RTLD_LOCAL);
44  ASSERT_TRUE(handle != nullptr) << dlerror();
45  typedef int (*fn_t)(void (*)(void), void (*)(void), void (*)(void));
46  fn_t fn = reinterpret_cast<fn_t>(dlsym(handle, "proxy_pthread_atfork"));
47  ASSERT_TRUE(fn != nullptr) << dlerror();
48  // the library registers 2 additional atfork handlers in a constructor
49  ASSERT_EQ(0, fn(AtForkPrepare2, AtForkParent2, AtForkChild2));
50  ASSERT_EQ(0, fn(AtForkPrepare3, AtForkParent3, AtForkChild3));
51
52  ASSERT_EQ(0, pthread_atfork(AtForkPrepare4, AtForkParent4, AtForkChild4));
53
54  pid_t pid = fork();
55
56  ASSERT_NE(-1, pid) << strerror(errno);
57
58  if (pid == 0) {
59    ASSERT_EQ(1234, g_atfork_child_calls);
60    _exit(0);
61  }
62
63  ASSERT_EQ(1234, g_atfork_parent_calls);
64  ASSERT_EQ(4321, g_atfork_prepare_calls);
65
66  EXPECT_EQ(0, dlclose(handle));
67  g_atfork_prepare_calls = g_atfork_parent_calls = g_atfork_child_calls = 0;
68
69  AssertChildExited(pid, 0);
70
71  pid = fork();
72
73  ASSERT_NE(-1, pid) << strerror(errno);
74
75  if (pid == 0) {
76    ASSERT_EQ(14, g_atfork_child_calls);
77    _exit(0);
78  }
79
80  ASSERT_EQ(14, g_atfork_parent_calls);
81  ASSERT_EQ(41, g_atfork_prepare_calls);
82
83  AssertChildExited(pid, 0);
84}
85