Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 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 | |
| 17 | #include "fdevent.h" |
| 18 | |
| 19 | #include <gtest/gtest.h> |
| 20 | |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 21 | #include <limits> |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 22 | #include <queue> |
| 23 | #include <string> |
| 24 | #include <vector> |
| 25 | |
| 26 | #include <pthread.h> |
| 27 | #include <signal.h> |
| 28 | |
| 29 | #include "adb_io.h" |
| 30 | |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 31 | class FdHandler { |
| 32 | public: |
| 33 | FdHandler(int read_fd, int write_fd) : read_fd_(read_fd), write_fd_(write_fd) { |
| 34 | fdevent_install(&read_fde_, read_fd_, FdEventCallback, this); |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 35 | fdevent_add(&read_fde_, FDE_READ); |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 36 | fdevent_install(&write_fde_, write_fd_, FdEventCallback, this); |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 37 | } |
| 38 | |
| 39 | ~FdHandler() { |
| 40 | fdevent_remove(&read_fde_); |
| 41 | fdevent_remove(&write_fde_); |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 42 | } |
| 43 | |
| 44 | private: |
| 45 | static void FdEventCallback(int fd, unsigned events, void* userdata) { |
| 46 | FdHandler* handler = reinterpret_cast<FdHandler*>(userdata); |
| 47 | ASSERT_EQ(0u, (events & ~(FDE_READ | FDE_WRITE))) << "unexpected events: " << events; |
| 48 | if (events & FDE_READ) { |
| 49 | ASSERT_EQ(fd, handler->read_fd_); |
| 50 | char c; |
| 51 | ASSERT_EQ(1, read(fd, &c, 1)); |
| 52 | handler->queue_.push(c); |
| 53 | fdevent_add(&handler->write_fde_, FDE_WRITE); |
| 54 | } |
| 55 | if (events & FDE_WRITE) { |
| 56 | ASSERT_EQ(fd, handler->write_fd_); |
| 57 | ASSERT_FALSE(handler->queue_.empty()); |
| 58 | char c = handler->queue_.front(); |
| 59 | handler->queue_.pop(); |
| 60 | ASSERT_EQ(1, write(fd, &c, 1)); |
| 61 | if (handler->queue_.empty()) { |
| 62 | fdevent_del(&handler->write_fde_, FDE_WRITE); |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | private: |
| 68 | const int read_fd_; |
| 69 | const int write_fd_; |
| 70 | fdevent read_fde_; |
| 71 | fdevent write_fde_; |
| 72 | std::queue<char> queue_; |
| 73 | }; |
| 74 | |
| 75 | static void signal_handler(int) { |
| 76 | pthread_exit(nullptr); |
| 77 | } |
| 78 | |
Yabin Cui | c1b1f6f | 2015-09-15 16:27:09 -0700 | [diff] [blame] | 79 | class FdeventTest : public ::testing::Test { |
| 80 | protected: |
| 81 | static void SetUpTestCase() { |
| 82 | ASSERT_NE(SIG_ERR, signal(SIGUSR1, signal_handler)); |
| 83 | ASSERT_NE(SIG_ERR, signal(SIGPIPE, SIG_IGN)); |
| 84 | } |
| 85 | |
| 86 | virtual void SetUp() { |
| 87 | fdevent_reset(); |
| 88 | ASSERT_EQ(0u, fdevent_installed_count()); |
| 89 | } |
| 90 | }; |
| 91 | |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 92 | struct ThreadArg { |
| 93 | int first_read_fd; |
| 94 | int last_write_fd; |
| 95 | size_t middle_pipe_count; |
| 96 | }; |
| 97 | |
| 98 | static void FdEventThreadFunc(ThreadArg* arg) { |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 99 | std::vector<int> read_fds; |
| 100 | std::vector<int> write_fds; |
| 101 | |
| 102 | read_fds.push_back(arg->first_read_fd); |
| 103 | for (size_t i = 0; i < arg->middle_pipe_count; ++i) { |
| 104 | int fds[2]; |
| 105 | ASSERT_EQ(0, pipe(fds)); |
| 106 | read_fds.push_back(fds[0]); |
| 107 | write_fds.push_back(fds[1]); |
| 108 | } |
| 109 | write_fds.push_back(arg->last_write_fd); |
| 110 | |
| 111 | std::vector<std::unique_ptr<FdHandler>> fd_handlers; |
| 112 | for (size_t i = 0; i < read_fds.size(); ++i) { |
| 113 | fd_handlers.push_back(std::unique_ptr<FdHandler>(new FdHandler(read_fds[i], write_fds[i]))); |
| 114 | } |
| 115 | |
| 116 | fdevent_loop(); |
| 117 | } |
| 118 | |
Yabin Cui | c1b1f6f | 2015-09-15 16:27:09 -0700 | [diff] [blame] | 119 | TEST_F(FdeventTest, smoke) { |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 120 | const size_t PIPE_COUNT = 10; |
| 121 | const size_t MESSAGE_LOOP_COUNT = 100; |
| 122 | const std::string MESSAGE = "fdevent_test"; |
| 123 | int fd_pair1[2]; |
| 124 | int fd_pair2[2]; |
| 125 | ASSERT_EQ(0, pipe(fd_pair1)); |
| 126 | ASSERT_EQ(0, pipe(fd_pair2)); |
| 127 | pthread_t thread; |
| 128 | ThreadArg thread_arg; |
| 129 | thread_arg.first_read_fd = fd_pair1[0]; |
| 130 | thread_arg.last_write_fd = fd_pair2[1]; |
| 131 | thread_arg.middle_pipe_count = PIPE_COUNT; |
| 132 | int writer = fd_pair1[1]; |
| 133 | int reader = fd_pair2[0]; |
| 134 | |
| 135 | ASSERT_EQ(0, pthread_create(&thread, nullptr, |
| 136 | reinterpret_cast<void* (*)(void*)>(FdEventThreadFunc), |
| 137 | &thread_arg)); |
| 138 | |
| 139 | for (size_t i = 0; i < MESSAGE_LOOP_COUNT; ++i) { |
| 140 | std::string read_buffer = MESSAGE; |
| 141 | std::string write_buffer(MESSAGE.size(), 'a'); |
| 142 | ASSERT_TRUE(WriteFdExactly(writer, read_buffer.c_str(), read_buffer.size())); |
| 143 | ASSERT_TRUE(ReadFdExactly(reader, &write_buffer[0], write_buffer.size())); |
| 144 | ASSERT_EQ(read_buffer, write_buffer); |
| 145 | } |
| 146 | |
| 147 | ASSERT_EQ(0, pthread_kill(thread, SIGUSR1)); |
| 148 | ASSERT_EQ(0, pthread_join(thread, nullptr)); |
Yabin Cui | c1b1f6f | 2015-09-15 16:27:09 -0700 | [diff] [blame] | 149 | ASSERT_EQ(0, close(writer)); |
| 150 | ASSERT_EQ(0, close(reader)); |
Yabin Cui | bec02fc | 2015-08-28 15:44:27 -0700 | [diff] [blame] | 151 | } |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 152 | |
| 153 | struct InvalidFdArg { |
| 154 | fdevent fde; |
| 155 | unsigned expected_events; |
| 156 | size_t* happened_event_count; |
| 157 | }; |
| 158 | |
| 159 | static void InvalidFdEventCallback(int fd, unsigned events, void* userdata) { |
| 160 | InvalidFdArg* arg = reinterpret_cast<InvalidFdArg*>(userdata); |
| 161 | ASSERT_EQ(arg->expected_events, events); |
| 162 | fdevent_remove(&arg->fde); |
| 163 | if (++*(arg->happened_event_count) == 2) { |
| 164 | pthread_exit(nullptr); |
| 165 | } |
| 166 | } |
| 167 | |
Yabin Cui | c1b1f6f | 2015-09-15 16:27:09 -0700 | [diff] [blame] | 168 | static void InvalidFdThreadFunc(void*) { |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 169 | const int INVALID_READ_FD = std::numeric_limits<int>::max() - 1; |
| 170 | size_t happened_event_count = 0; |
| 171 | InvalidFdArg read_arg; |
| 172 | read_arg.expected_events = FDE_READ | FDE_ERROR; |
| 173 | read_arg.happened_event_count = &happened_event_count; |
| 174 | fdevent_install(&read_arg.fde, INVALID_READ_FD, InvalidFdEventCallback, &read_arg); |
| 175 | fdevent_add(&read_arg.fde, FDE_READ); |
| 176 | |
| 177 | const int INVALID_WRITE_FD = std::numeric_limits<int>::max(); |
| 178 | InvalidFdArg write_arg; |
| 179 | write_arg.expected_events = FDE_READ | FDE_ERROR; |
| 180 | write_arg.happened_event_count = &happened_event_count; |
| 181 | fdevent_install(&write_arg.fde, INVALID_WRITE_FD, InvalidFdEventCallback, &write_arg); |
| 182 | fdevent_add(&write_arg.fde, FDE_WRITE); |
| 183 | fdevent_loop(); |
| 184 | } |
| 185 | |
Yabin Cui | c1b1f6f | 2015-09-15 16:27:09 -0700 | [diff] [blame] | 186 | TEST_F(FdeventTest, invalid_fd) { |
Yabin Cui | a108016 | 2015-09-04 16:19:56 -0700 | [diff] [blame] | 187 | pthread_t thread; |
| 188 | ASSERT_EQ(0, pthread_create(&thread, nullptr, |
| 189 | reinterpret_cast<void* (*)(void*)>(InvalidFdThreadFunc), |
| 190 | nullptr)); |
| 191 | ASSERT_EQ(0, pthread_join(thread, nullptr)); |
| 192 | } |