1 /* 2 * Copyright (C) 2010 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 <ui/InputTransport.h> 18 #include <utils/Timers.h> 19 #include <utils/StopWatch.h> 20 #include <gtest/gtest.h> 21 #include <unistd.h> 22 #include <time.h> 23 #include <sys/mman.h> 24 #include <cutils/ashmem.h> 25 26 #include "../../utils/tests/TestHelpers.h" 27 28 namespace android { 29 30 class InputChannelTest : public testing::Test { 31 protected: 32 virtual void SetUp() { } 33 virtual void TearDown() { } 34 }; 35 36 37 TEST_F(InputChannelTest, ConstructorAndDestructor_TakesOwnershipOfFileDescriptors) { 38 // Our purpose here is to verify that the input channel destructor closes the 39 // file descriptors provided to it. One easy way is to provide it with one end 40 // of a pipe and to check for EPIPE on the other end after the channel is destroyed. 41 Pipe fakeAshmem, sendPipe, receivePipe; 42 43 sp<InputChannel> inputChannel = new InputChannel(String8("channel name"), 44 fakeAshmem.sendFd, receivePipe.receiveFd, sendPipe.sendFd); 45 46 EXPECT_STREQ("channel name", inputChannel->getName().string()) 47 << "channel should have provided name"; 48 EXPECT_EQ(fakeAshmem.sendFd, inputChannel->getAshmemFd()) 49 << "channel should have provided ashmem fd"; 50 EXPECT_EQ(receivePipe.receiveFd, inputChannel->getReceivePipeFd()) 51 << "channel should have provided receive pipe fd"; 52 EXPECT_EQ(sendPipe.sendFd, inputChannel->getSendPipeFd()) 53 << "channel should have provided send pipe fd"; 54 55 inputChannel.clear(); // destroys input channel 56 57 EXPECT_EQ(-EPIPE, fakeAshmem.readSignal()) 58 << "channel should have closed ashmem fd when destroyed"; 59 EXPECT_EQ(-EPIPE, receivePipe.writeSignal()) 60 << "channel should have closed receive pipe fd when destroyed"; 61 EXPECT_EQ(-EPIPE, sendPipe.readSignal()) 62 << "channel should have closed send pipe fd when destroyed"; 63 64 // clean up fds of Pipe endpoints that were closed so we don't try to close them again 65 fakeAshmem.sendFd = -1; 66 receivePipe.receiveFd = -1; 67 sendPipe.sendFd = -1; 68 } 69 70 TEST_F(InputChannelTest, OpenInputChannelPair_ReturnsAPairOfConnectedChannels) { 71 sp<InputChannel> serverChannel, clientChannel; 72 73 status_t result = InputChannel::openInputChannelPair(String8("channel name"), 74 serverChannel, clientChannel); 75 76 ASSERT_EQ(OK, result) 77 << "should have successfully opened a channel pair"; 78 79 // Name 80 EXPECT_STREQ("channel name (server)", serverChannel->getName().string()) 81 << "server channel should have suffixed name"; 82 EXPECT_STREQ("channel name (client)", clientChannel->getName().string()) 83 << "client channel should have suffixed name"; 84 85 // Ashmem uniqueness 86 EXPECT_NE(serverChannel->getAshmemFd(), clientChannel->getAshmemFd()) 87 << "server and client channel should have different ashmem fds because it was dup'd"; 88 89 // Ashmem usability 90 ssize_t serverAshmemSize = ashmem_get_size_region(serverChannel->getAshmemFd()); 91 ssize_t clientAshmemSize = ashmem_get_size_region(clientChannel->getAshmemFd()); 92 uint32_t* serverAshmem = static_cast<uint32_t*>(mmap(NULL, serverAshmemSize, 93 PROT_READ | PROT_WRITE, MAP_SHARED, serverChannel->getAshmemFd(), 0)); 94 uint32_t* clientAshmem = static_cast<uint32_t*>(mmap(NULL, clientAshmemSize, 95 PROT_READ | PROT_WRITE, MAP_SHARED, clientChannel->getAshmemFd(), 0)); 96 ASSERT_TRUE(serverAshmem != NULL) 97 << "server channel ashmem should be mappable"; 98 ASSERT_TRUE(clientAshmem != NULL) 99 << "client channel ashmem should be mappable"; 100 *serverAshmem = 0xf00dd00d; 101 EXPECT_EQ(0xf00dd00d, *clientAshmem) 102 << "ashmem buffer should be shared by client and server"; 103 munmap(serverAshmem, serverAshmemSize); 104 munmap(clientAshmem, clientAshmemSize); 105 106 // Server->Client communication 107 EXPECT_EQ(OK, serverChannel->sendSignal('S')) 108 << "server channel should be able to send signal to client channel"; 109 char signal; 110 EXPECT_EQ(OK, clientChannel->receiveSignal(& signal)) 111 << "client channel should be able to receive signal from server channel"; 112 EXPECT_EQ('S', signal) 113 << "client channel should receive the correct signal from server channel"; 114 115 // Client->Server communication 116 EXPECT_EQ(OK, clientChannel->sendSignal('c')) 117 << "client channel should be able to send signal to server channel"; 118 EXPECT_EQ(OK, serverChannel->receiveSignal(& signal)) 119 << "server channel should be able to receive signal from client channel"; 120 EXPECT_EQ('c', signal) 121 << "server channel should receive the correct signal from client channel"; 122 } 123 124 TEST_F(InputChannelTest, ReceiveSignal_WhenNoSignalPresent_ReturnsAnError) { 125 sp<InputChannel> serverChannel, clientChannel; 126 127 status_t result = InputChannel::openInputChannelPair(String8("channel name"), 128 serverChannel, clientChannel); 129 130 ASSERT_EQ(OK, result) 131 << "should have successfully opened a channel pair"; 132 133 char signal; 134 EXPECT_EQ(WOULD_BLOCK, clientChannel->receiveSignal(& signal)) 135 << "receiveSignal should have returned WOULD_BLOCK"; 136 } 137 138 TEST_F(InputChannelTest, ReceiveSignal_WhenPeerClosed_ReturnsAnError) { 139 sp<InputChannel> serverChannel, clientChannel; 140 141 status_t result = InputChannel::openInputChannelPair(String8("channel name"), 142 serverChannel, clientChannel); 143 144 ASSERT_EQ(OK, result) 145 << "should have successfully opened a channel pair"; 146 147 serverChannel.clear(); // close server channel 148 149 char signal; 150 EXPECT_EQ(DEAD_OBJECT, clientChannel->receiveSignal(& signal)) 151 << "receiveSignal should have returned DEAD_OBJECT"; 152 } 153 154 TEST_F(InputChannelTest, SendSignal_WhenPeerClosed_ReturnsAnError) { 155 sp<InputChannel> serverChannel, clientChannel; 156 157 status_t result = InputChannel::openInputChannelPair(String8("channel name"), 158 serverChannel, clientChannel); 159 160 ASSERT_EQ(OK, result) 161 << "should have successfully opened a channel pair"; 162 163 serverChannel.clear(); // close server channel 164 165 EXPECT_EQ(DEAD_OBJECT, clientChannel->sendSignal('S')) 166 << "sendSignal should have returned DEAD_OBJECT"; 167 } 168 169 170 } // namespace android 171
