libs/binder/tests/binderDriverInterfaceTest.cpp - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright (C) 2014 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>

 #include <gtest/gtest.h>
 #include <linux/android/binder.h>
 #include <binder/IBinder.h>
 #include <sys/mman.h>
 #include <poll.h>

 #define BINDER_DEV_NAME "/dev/binder"

 testing::Environment* binder_env;

 class BinderDriverInterfaceTestEnv : public ::testing::Environment {
         virtual void SetUp() {
             int ret;
             uint32_t max_threads = 0;

             m_binderFd = open(BINDER_DEV_NAME, O_RDWR | O_NONBLOCK | O_CLOEXEC);
             ASSERT_GE(m_binderFd, 0);
             m_buffer = mmap(nullptr, 64*1024, PROT_READ, MAP_SHARED, m_binderFd, 0);
             ASSERT_NE(m_buffer, (void *)nullptr);
             ret = ioctl(m_binderFd, BINDER_SET_MAX_THREADS, &max_threads);
             EXPECT_EQ(0, ret);
             EnterLooper();
         }
         virtual void TearDown() {
             close(m_binderFd);
         }
     private:
         int m_binderFd;
         void *m_buffer;
     public:
         int getBinderFd(void) {
             return m_binderFd;
         }
         void EnterLooper(void) {
             int ret;
             const uint32_t bc[] = {
                 BC_ENTER_LOOPER,
             };
             struct binder_write_read bwr = binder_write_read();
             bwr.write_buffer = (uintptr_t)bc;
             bwr.write_size = sizeof(bc);
             ret = ioctl(m_binderFd, BINDER_WRITE_READ, &bwr);
             EXPECT_EQ(0, ret);
             if (ret < 0) {
                     EXPECT_EQ(0, errno);
             }
             EXPECT_EQ(sizeof(bc), bwr.write_consumed);
         }
 };

 class BinderDriverInterfaceTest : public ::testing::Test {
     public:
         virtual void SetUp() {
             m_binderFd = static_cast<BinderDriverInterfaceTestEnv *>(binder_env)->getBinderFd();
         }
         virtual void TearDown() {
         }
     protected:
         /* The ioctl must either return 0, or if it doesn't errno should be accepted_errno */
         void binderTestIoctlSuccessOrError(int cmd, void *arg, int accepted_errno) {
             int ret;

             ret = ioctl(m_binderFd, cmd, arg);
             if (ret != 0) {
                 EXPECT_EQ(errno, accepted_errno);
             }
         }

         void binderTestIoctlRetErr2(int cmd, void *arg, int expect_ret, int expect_errno, int accept_errno) {
             int ret;

             ret = ioctl(m_binderFd, cmd, arg);
             EXPECT_EQ(expect_ret, ret);
             if (ret < 0) {
                 if (errno != accept_errno)
                     EXPECT_EQ(expect_errno, errno);
             }
         }
         void binderTestIoctlErr2(int cmd, void *arg, int expect_errno, int accept_errno) {
             binderTestIoctlRetErr2(cmd, arg, -1, expect_errno, accept_errno);
         }
         void binderTestIoctlErr1(int cmd, void *arg, int expect_errno) {
             binderTestIoctlErr2(cmd, arg, expect_errno, expect_errno);
         }
         void binderTestIoctl(int cmd, void *arg) {
             binderTestIoctlRetErr2(cmd, arg, 0, 0, 0);
         }
         void binderTestIoctlUnimplemented(int cmd, void *arg) {
             int ret;

             ret = ioctl(m_binderFd, cmd, arg);
             if (ret < 0) {
                 /* Not currently implmented. Allow ret == -1, errno == EINVAL */
                 EXPECT_EQ(-1, ret);
                 EXPECT_EQ(EINVAL, errno);
             }
         }
         void binderTestReadEmpty(void) {
             size_t i;
             uint32_t br[32];
             struct binder_write_read bwr = binder_write_read();
             SCOPED_TRACE("TestReadEmpty");
             bwr.read_buffer = (uintptr_t)br;
             bwr.read_size = sizeof(br);
             binderTestIoctlErr1(BINDER_WRITE_READ, &bwr, EAGAIN);
             EXPECT_EQ(0u, bwr.read_consumed);
             for (i = 0; i * sizeof(uint32_t) < bwr.read_consumed; i++) {
                 SCOPED_TRACE(testing::Message() << "i = " << i);
                 EXPECT_EQ(BR_NOOP, br[i]);
             }
         }
         void binderWaitForReadData(int timeout_ms) {
             int ret;
             pollfd pfd = pollfd();

             pfd.fd = m_binderFd;
             pfd.events = POLLIN;
             ret = poll(&pfd, 1, timeout_ms);
             EXPECT_EQ(1, ret);
         }
     private:
         int m_binderFd;
 };

 TEST_F(BinderDriverInterfaceTest, Version) {
     struct binder_version version;
     binderTestIoctl(BINDER_VERSION, &version);
     ASSERT_EQ(BINDER_CURRENT_PROTOCOL_VERSION, version.protocol_version);
 }

 TEST_F(BinderDriverInterfaceTest, OpenNoMmap) {
     int binderFd = open(BINDER_DEV_NAME, O_RDWR | O_NONBLOCK | O_CLOEXEC);
     ASSERT_GE(binderFd, 0);
     close(binderFd);
 }

 TEST_F(BinderDriverInterfaceTest, WriteReadNull) {
     binderTestIoctlErr1(BINDER_WRITE_READ, nullptr, EFAULT);
 }

 TEST_F(BinderDriverInterfaceTest, SetIdleTimeoutNull) {
     binderTestIoctlErr2(BINDER_SET_IDLE_TIMEOUT, nullptr, EFAULT, EINVAL);
 }

 TEST_F(BinderDriverInterfaceTest, SetMaxThreadsNull) {
     binderTestIoctlErr2(BINDER_SET_MAX_THREADS, nullptr, EFAULT, EINVAL); /* TODO: don't accept EINVAL */
 }

 TEST_F(BinderDriverInterfaceTest, SetIdlePriorityNull) {
     binderTestIoctlErr2(BINDER_SET_IDLE_PRIORITY, nullptr, EFAULT, EINVAL);
 }

 TEST_F(BinderDriverInterfaceTest, VersionNull) {
     binderTestIoctlErr2(BINDER_VERSION, nullptr, EFAULT, EINVAL); /* TODO: don't accept EINVAL */
 }

 TEST_F(BinderDriverInterfaceTest, SetIdleTimeoutNoTest) {
     int64_t idle_timeout = 100000;
     binderTestIoctlUnimplemented(BINDER_SET_IDLE_TIMEOUT, &idle_timeout);
 }

 TEST_F(BinderDriverInterfaceTest, SetMaxThreads) {
     uint32_t max_threads = 0;
     binderTestIoctl(BINDER_SET_MAX_THREADS, &max_threads);
 }

 TEST_F(BinderDriverInterfaceTest, SetIdlePriorityNoTest) {
     int idle_priority = 0;
     binderTestIoctlUnimplemented(BINDER_SET_IDLE_PRIORITY, &idle_priority);
 }

 TEST_F(BinderDriverInterfaceTest, SetContextMgrBusy) {
     int32_t dummy = 0;
     binderTestIoctlErr1(BINDER_SET_CONTEXT_MGR, &dummy, EBUSY);
 }

 TEST_F(BinderDriverInterfaceTest, ThreadExit) {
     int32_t dummy = 0;
     binderTestIoctl(BINDER_THREAD_EXIT, &dummy);
     static_cast<BinderDriverInterfaceTestEnv *>(binder_env)->EnterLooper();
 }

 TEST_F(BinderDriverInterfaceTest, WriteReadEmpty) {
     struct binder_write_read bwr = binder_write_read();
     binderTestIoctl(BINDER_WRITE_READ, &bwr);
 }

 TEST_F(BinderDriverInterfaceTest, Read) {
     binderTestReadEmpty();
 }

 TEST_F(BinderDriverInterfaceTest, IncRefsAcquireReleaseDecRefs) {
     const uint32_t bc[] = {
         BC_INCREFS,
         0,
         BC_ACQUIRE,
         0,
         BC_RELEASE,
         0,
         BC_DECREFS,
         0,
     };
     struct binder_write_read bwr = binder_write_read();
     bwr.write_buffer = (uintptr_t)bc;
     bwr.write_size = sizeof(bc);
     binderTestIoctl(BINDER_WRITE_READ, &bwr);
     EXPECT_EQ(sizeof(bc), bwr.write_consumed);
     binderTestReadEmpty();
 }

 TEST_F(BinderDriverInterfaceTest, Transaction) {
     struct {
         uint32_t cmd1;
         struct binder_transaction_data arg1;
     } __attribute__((packed)) bc1 = {
         .cmd1 = BC_TRANSACTION,
         .arg1 = {
             .target = { 0 },
             .cookie = 0,
             .code = android::IBinder::PING_TRANSACTION,
             .flags = 0,
             .sender_pid = 0,
             .sender_euid = 0,
             .data_size = 0,
             .offsets_size = 0,
             .data = {
                 .ptr = {0, 0},
             },
         },
     };
     struct {
         uint32_t cmd0;
         uint32_t cmd1;
         uint32_t cmd2;
         binder_transaction_data arg2;
         uint32_t pad[16];
     } __attribute__((packed)) br;
     struct binder_write_read bwr = binder_write_read();

     bwr.write_buffer = (uintptr_t)&bc1;
     bwr.write_size = sizeof(bc1);
     bwr.read_buffer = (uintptr_t)&br;
     bwr.read_size = sizeof(br);

     {
         SCOPED_TRACE("1st WriteRead");
         binderTestIoctlSuccessOrError(BINDER_WRITE_READ, &bwr, EAGAIN);
     }
     EXPECT_EQ(sizeof(bc1), bwr.write_consumed);
     if (bwr.read_consumed < offsetof(typeof(br), pad)) {
         SCOPED_TRACE("2nd WriteRead");
         binderWaitForReadData(10000);
         binderTestIoctl(BINDER_WRITE_READ, &bwr);
     }
     EXPECT_EQ(offsetof(typeof(br), pad), bwr.read_consumed);
     if (bwr.read_consumed > offsetof(typeof(br), cmd0))
         EXPECT_EQ(BR_NOOP, br.cmd0);
     if (bwr.read_consumed > offsetof(typeof(br), cmd1))
         EXPECT_EQ(BR_TRANSACTION_COMPLETE, br.cmd1);
     if (bwr.read_consumed > offsetof(typeof(br), cmd2))
         EXPECT_EQ(BR_REPLY, br.cmd2);
     if (bwr.read_consumed >= offsetof(typeof(br), pad)) {
         EXPECT_EQ(0u, br.arg2.target.ptr);
         EXPECT_EQ(0u, br.arg2.cookie);
         EXPECT_EQ(0u, br.arg2.code);
         EXPECT_EQ(0u, br.arg2.flags);
         EXPECT_EQ(0u, br.arg2.data_size);
         EXPECT_EQ(0u, br.arg2.offsets_size);

         SCOPED_TRACE("3rd WriteRead");

         binderTestReadEmpty();

         struct {
             uint32_t cmd1;
             binder_uintptr_t arg1;
         } __attribute__((packed)) bc2 = {
             .cmd1 = BC_FREE_BUFFER,
             .arg1 = br.arg2.data.ptr.buffer,
         };

         bwr.write_buffer = (uintptr_t)&bc2;
         bwr.write_size = sizeof(bc2);
         bwr.write_consumed = 0;
         bwr.read_size = 0;

         binderTestIoctl(BINDER_WRITE_READ, &bwr);
         EXPECT_EQ(sizeof(bc2), bwr.write_consumed);
     }
     binderTestReadEmpty();
 }

 TEST_F(BinderDriverInterfaceTest, RequestDeathNotification) {
     binder_uintptr_t cookie = 1234;
     struct {
         uint32_t cmd0;
         uint32_t arg0;
         uint32_t cmd1;
         struct binder_handle_cookie arg1;
         uint32_t cmd2;
         struct binder_handle_cookie arg2;
         uint32_t cmd3;
         uint32_t arg3;
     } __attribute__((packed)) bc = {
         .cmd0 = BC_INCREFS,
         .arg0 = 0,
         .cmd1 = BC_REQUEST_DEATH_NOTIFICATION,
         .arg1 = {
             .handle = 0,
             .cookie = cookie,
         },
         .cmd2 = BC_CLEAR_DEATH_NOTIFICATION,
         .arg2 = {
             .handle = 0,
             .cookie = cookie,
         },
         .cmd3 = BC_DECREFS,
         .arg3 = 0,
     };
     struct {
         uint32_t cmd0;
         uint32_t cmd1;
         binder_uintptr_t arg1;
         uint32_t pad[16];
     } __attribute__((packed)) br;
     struct binder_write_read bwr = binder_write_read();

     bwr.write_buffer = (uintptr_t)&bc;
     bwr.write_size = sizeof(bc);
     bwr.read_buffer = (uintptr_t)&br;
     bwr.read_size = sizeof(br);

     binderTestIoctl(BINDER_WRITE_READ, &bwr);
     EXPECT_EQ(sizeof(bc), bwr.write_consumed);
     EXPECT_EQ(sizeof(br) - sizeof(br.pad), bwr.read_consumed);
     EXPECT_EQ(BR_NOOP, br.cmd0);
     EXPECT_EQ(BR_CLEAR_DEATH_NOTIFICATION_DONE, br.cmd1);
     EXPECT_EQ(cookie, br.arg1);
     binderTestReadEmpty();
 }

 int main(int argc, char **argv) {
     ::testing::InitGoogleTest(&argc, argv);

     binder_env = AddGlobalTestEnvironment(new BinderDriverInterfaceTestEnv());

     return RUN_ALL_TESTS();
 }
	/*
	* Copyright (C) 2014 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <errno.h>
	#include <fcntl.h>
	#include <stdio.h>
	#include <stdlib.h>

	#include <gtest/gtest.h>
	#include <linux/android/binder.h>
	#include <binder/IBinder.h>
	#include <sys/mman.h>
	#include <poll.h>

	#define BINDER_DEV_NAME "/dev/binder"

	testing::Environment* binder_env;

	class BinderDriverInterfaceTestEnv : public ::testing::Environment {
	virtual void SetUp() {
	int ret;
	uint32_t max_threads = 0;

	m_binderFd = open(BINDER_DEV_NAME, O_RDWR \| O_NONBLOCK \| O_CLOEXEC);
	ASSERT_GE(m_binderFd, 0);
	m_buffer = mmap(nullptr, 64*1024, PROT_READ, MAP_SHARED, m_binderFd, 0);
	ASSERT_NE(m_buffer, (void *)nullptr);
	ret = ioctl(m_binderFd, BINDER_SET_MAX_THREADS, &max_threads);
	EXPECT_EQ(0, ret);
	EnterLooper();
	}
	virtual void TearDown() {
	close(m_binderFd);
	}
	private:
	int m_binderFd;
	void *m_buffer;
	public:
	int getBinderFd(void) {
	return m_binderFd;
	}
	void EnterLooper(void) {
	int ret;
	const uint32_t bc[] = {
	BC_ENTER_LOOPER,
	};
	struct binder_write_read bwr = binder_write_read();
	bwr.write_buffer = (uintptr_t)bc;
	bwr.write_size = sizeof(bc);
	ret = ioctl(m_binderFd, BINDER_WRITE_READ, &bwr);
	EXPECT_EQ(0, ret);
	if (ret < 0) {
	EXPECT_EQ(0, errno);
	}
	EXPECT_EQ(sizeof(bc), bwr.write_consumed);
	}
	};

	class BinderDriverInterfaceTest : public ::testing::Test {
	public:
	virtual void SetUp() {
	m_binderFd = static_cast<BinderDriverInterfaceTestEnv *>(binder_env)->getBinderFd();
	}
	virtual void TearDown() {
	}
	protected:
	/* The ioctl must either return 0, or if it doesn't errno should be accepted_errno */
	void binderTestIoctlSuccessOrError(int cmd, void *arg, int accepted_errno) {
	int ret;

	ret = ioctl(m_binderFd, cmd, arg);
	if (ret != 0) {
	EXPECT_EQ(errno, accepted_errno);
	}
	}

	void binderTestIoctlRetErr2(int cmd, void *arg, int expect_ret, int expect_errno, int accept_errno) {
	int ret;

	ret = ioctl(m_binderFd, cmd, arg);
	EXPECT_EQ(expect_ret, ret);
	if (ret < 0) {
	if (errno != accept_errno)
	EXPECT_EQ(expect_errno, errno);
	}
	}
	void binderTestIoctlErr2(int cmd, void *arg, int expect_errno, int accept_errno) {
	binderTestIoctlRetErr2(cmd, arg, -1, expect_errno, accept_errno);
	}
	void binderTestIoctlErr1(int cmd, void *arg, int expect_errno) {
	binderTestIoctlErr2(cmd, arg, expect_errno, expect_errno);
	}
	void binderTestIoctl(int cmd, void *arg) {
	binderTestIoctlRetErr2(cmd, arg, 0, 0, 0);
	}
	void binderTestIoctlUnimplemented(int cmd, void *arg) {
	int ret;

	ret = ioctl(m_binderFd, cmd, arg);
	if (ret < 0) {
	/* Not currently implmented. Allow ret == -1, errno == EINVAL */
	EXPECT_EQ(-1, ret);
	EXPECT_EQ(EINVAL, errno);
	}
	}
	void binderTestReadEmpty(void) {
	size_t i;
	uint32_t br[32];
	struct binder_write_read bwr = binder_write_read();
	SCOPED_TRACE("TestReadEmpty");
	bwr.read_buffer = (uintptr_t)br;
	bwr.read_size = sizeof(br);
	binderTestIoctlErr1(BINDER_WRITE_READ, &bwr, EAGAIN);
	EXPECT_EQ(0u, bwr.read_consumed);
	for (i = 0; i * sizeof(uint32_t) < bwr.read_consumed; i++) {
	SCOPED_TRACE(testing::Message() << "i = " << i);
	EXPECT_EQ(BR_NOOP, br[i]);
	}
	}
	void binderWaitForReadData(int timeout_ms) {
	int ret;
	pollfd pfd = pollfd();

	pfd.fd = m_binderFd;
	pfd.events = POLLIN;
	ret = poll(&pfd, 1, timeout_ms);
	EXPECT_EQ(1, ret);
	}
	private:
	int m_binderFd;
	};

	TEST_F(BinderDriverInterfaceTest, Version) {
	struct binder_version version;
	binderTestIoctl(BINDER_VERSION, &version);
	ASSERT_EQ(BINDER_CURRENT_PROTOCOL_VERSION, version.protocol_version);
	}

	TEST_F(BinderDriverInterfaceTest, OpenNoMmap) {
	int binderFd = open(BINDER_DEV_NAME, O_RDWR \| O_NONBLOCK \| O_CLOEXEC);
	ASSERT_GE(binderFd, 0);
	close(binderFd);
	}

	TEST_F(BinderDriverInterfaceTest, WriteReadNull) {
	binderTestIoctlErr1(BINDER_WRITE_READ, nullptr, EFAULT);
	}

	TEST_F(BinderDriverInterfaceTest, SetIdleTimeoutNull) {
	binderTestIoctlErr2(BINDER_SET_IDLE_TIMEOUT, nullptr, EFAULT, EINVAL);
	}

	TEST_F(BinderDriverInterfaceTest, SetMaxThreadsNull) {
	binderTestIoctlErr2(BINDER_SET_MAX_THREADS, nullptr, EFAULT, EINVAL); /* TODO: don't accept EINVAL */
	}

	TEST_F(BinderDriverInterfaceTest, SetIdlePriorityNull) {
	binderTestIoctlErr2(BINDER_SET_IDLE_PRIORITY, nullptr, EFAULT, EINVAL);
	}

	TEST_F(BinderDriverInterfaceTest, VersionNull) {
	binderTestIoctlErr2(BINDER_VERSION, nullptr, EFAULT, EINVAL); /* TODO: don't accept EINVAL */
	}

	TEST_F(BinderDriverInterfaceTest, SetIdleTimeoutNoTest) {
	int64_t idle_timeout = 100000;
	binderTestIoctlUnimplemented(BINDER_SET_IDLE_TIMEOUT, &idle_timeout);
	}

	TEST_F(BinderDriverInterfaceTest, SetMaxThreads) {
	uint32_t max_threads = 0;
	binderTestIoctl(BINDER_SET_MAX_THREADS, &max_threads);
	}

	TEST_F(BinderDriverInterfaceTest, SetIdlePriorityNoTest) {
	int idle_priority = 0;
	binderTestIoctlUnimplemented(BINDER_SET_IDLE_PRIORITY, &idle_priority);
	}

	TEST_F(BinderDriverInterfaceTest, SetContextMgrBusy) {
	int32_t dummy = 0;
	binderTestIoctlErr1(BINDER_SET_CONTEXT_MGR, &dummy, EBUSY);
	}

	TEST_F(BinderDriverInterfaceTest, ThreadExit) {
	int32_t dummy = 0;
	binderTestIoctl(BINDER_THREAD_EXIT, &dummy);
	static_cast<BinderDriverInterfaceTestEnv *>(binder_env)->EnterLooper();
	}

	TEST_F(BinderDriverInterfaceTest, WriteReadEmpty) {
	struct binder_write_read bwr = binder_write_read();
	binderTestIoctl(BINDER_WRITE_READ, &bwr);
	}

	TEST_F(BinderDriverInterfaceTest, Read) {
	binderTestReadEmpty();
	}

	TEST_F(BinderDriverInterfaceTest, IncRefsAcquireReleaseDecRefs) {
	const uint32_t bc[] = {
	BC_INCREFS,
	0,
	BC_ACQUIRE,
	0,
	BC_RELEASE,
	0,
	BC_DECREFS,
	0,
	};
	struct binder_write_read bwr = binder_write_read();
	bwr.write_buffer = (uintptr_t)bc;
	bwr.write_size = sizeof(bc);
	binderTestIoctl(BINDER_WRITE_READ, &bwr);
	EXPECT_EQ(sizeof(bc), bwr.write_consumed);
	binderTestReadEmpty();
	}

	TEST_F(BinderDriverInterfaceTest, Transaction) {
	struct {
	uint32_t cmd1;
	struct binder_transaction_data arg1;
	} __attribute__((packed)) bc1 = {
	.cmd1 = BC_TRANSACTION,
	.arg1 = {
	.target = { 0 },
	.cookie = 0,
	.code = android::IBinder::PING_TRANSACTION,
	.flags = 0,
	.sender_pid = 0,
	.sender_euid = 0,
	.data_size = 0,
	.offsets_size = 0,
	.data = {
	.ptr = {0, 0},
	},
	},
	};
	struct {
	uint32_t cmd0;
	uint32_t cmd1;
	uint32_t cmd2;
	binder_transaction_data arg2;
	uint32_t pad[16];
	} __attribute__((packed)) br;
	struct binder_write_read bwr = binder_write_read();

	bwr.write_buffer = (uintptr_t)&bc1;
	bwr.write_size = sizeof(bc1);
	bwr.read_buffer = (uintptr_t)&br;
	bwr.read_size = sizeof(br);

	{
	SCOPED_TRACE("1st WriteRead");
	binderTestIoctlSuccessOrError(BINDER_WRITE_READ, &bwr, EAGAIN);
	}
	EXPECT_EQ(sizeof(bc1), bwr.write_consumed);
	if (bwr.read_consumed < offsetof(typeof(br), pad)) {
	SCOPED_TRACE("2nd WriteRead");
	binderWaitForReadData(10000);
	binderTestIoctl(BINDER_WRITE_READ, &bwr);
	}
	EXPECT_EQ(offsetof(typeof(br), pad), bwr.read_consumed);
	if (bwr.read_consumed > offsetof(typeof(br), cmd0))
	EXPECT_EQ(BR_NOOP, br.cmd0);
	if (bwr.read_consumed > offsetof(typeof(br), cmd1))
	EXPECT_EQ(BR_TRANSACTION_COMPLETE, br.cmd1);
	if (bwr.read_consumed > offsetof(typeof(br), cmd2))
	EXPECT_EQ(BR_REPLY, br.cmd2);
	if (bwr.read_consumed >= offsetof(typeof(br), pad)) {
	EXPECT_EQ(0u, br.arg2.target.ptr);
	EXPECT_EQ(0u, br.arg2.cookie);
	EXPECT_EQ(0u, br.arg2.code);
	EXPECT_EQ(0u, br.arg2.flags);
	EXPECT_EQ(0u, br.arg2.data_size);
	EXPECT_EQ(0u, br.arg2.offsets_size);

	SCOPED_TRACE("3rd WriteRead");

	binderTestReadEmpty();

	struct {
	uint32_t cmd1;
	binder_uintptr_t arg1;
	} __attribute__((packed)) bc2 = {
	.cmd1 = BC_FREE_BUFFER,
	.arg1 = br.arg2.data.ptr.buffer,
	};

	bwr.write_buffer = (uintptr_t)&bc2;
	bwr.write_size = sizeof(bc2);
	bwr.write_consumed = 0;
	bwr.read_size = 0;

	binderTestIoctl(BINDER_WRITE_READ, &bwr);
	EXPECT_EQ(sizeof(bc2), bwr.write_consumed);
	}
	binderTestReadEmpty();
	}

	TEST_F(BinderDriverInterfaceTest, RequestDeathNotification) {
	binder_uintptr_t cookie = 1234;
	struct {
	uint32_t cmd0;
	uint32_t arg0;
	uint32_t cmd1;
	struct binder_handle_cookie arg1;
	uint32_t cmd2;
	struct binder_handle_cookie arg2;
	uint32_t cmd3;
	uint32_t arg3;
	} __attribute__((packed)) bc = {
	.cmd0 = BC_INCREFS,
	.arg0 = 0,
	.cmd1 = BC_REQUEST_DEATH_NOTIFICATION,
	.arg1 = {
	.handle = 0,
	.cookie = cookie,
	},
	.cmd2 = BC_CLEAR_DEATH_NOTIFICATION,
	.arg2 = {
	.handle = 0,
	.cookie = cookie,
	},
	.cmd3 = BC_DECREFS,
	.arg3 = 0,
	};
	struct {
	uint32_t cmd0;
	uint32_t cmd1;
	binder_uintptr_t arg1;
	uint32_t pad[16];
	} __attribute__((packed)) br;
	struct binder_write_read bwr = binder_write_read();

	bwr.write_buffer = (uintptr_t)&bc;
	bwr.write_size = sizeof(bc);
	bwr.read_buffer = (uintptr_t)&br;
	bwr.read_size = sizeof(br);

	binderTestIoctl(BINDER_WRITE_READ, &bwr);
	EXPECT_EQ(sizeof(bc), bwr.write_consumed);
	EXPECT_EQ(sizeof(br) - sizeof(br.pad), bwr.read_consumed);
	EXPECT_EQ(BR_NOOP, br.cmd0);
	EXPECT_EQ(BR_CLEAR_DEATH_NOTIFICATION_DONE, br.cmd1);
	EXPECT_EQ(cookie, br.arg1);
	binderTestReadEmpty();
	}

	int main(int argc, char **argv) {
	::testing::InitGoogleTest(&argc, argv);

	binder_env = AddGlobalTestEnvironment(new BinderDriverInterfaceTestEnv());

	return RUN_ALL_TESTS();
	}