Add binder tests

Change-Id: Ib0b38708dd6387fc4d5a4857ca74a217f3edad1a

libs/binder/tests/Android.mk

@@ -17,7 +17,6 @@
 LOCAL_PATH:= $(call my-dir)
 
 include $(CLEAR_VARS)
-
 ifneq ($(TARGET_USES_64_BIT_BINDER),true)
 ifneq ($(TARGET_IS_64_BIT),true)
 LOCAL_CFLAGS += -DBINDER_IPC_32BIT=1
@@ -27,3 +26,9 @@ endif
 LOCAL_MODULE := binderDriverInterfaceTest
 LOCAL_SRC_FILES := binderDriverInterfaceTest.cpp
 include $(BUILD_NATIVE_TEST)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := binderLibTest
+LOCAL_SRC_FILES := binderLibTest.cpp
+LOCAL_SHARED_LIBRARIES := libbinder libutils
+include $(BUILD_NATIVE_TEST)

libs/binder/tests/binderLibTest.cpp

@@ -0,0 +1,954 @@
+/*
+ * 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 <poll.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <gtest/gtest.h>
+
+#include <binder/Binder.h>
+#include <binder/IBinder.h>
+#include <binder/IPCThreadState.h>
+#include <binder/IServiceManager.h>
+
+#define ARRAY_SIZE(array) (sizeof array / sizeof array[0])
+
+using namespace android;
+
+static testing::Environment* binder_env;
+static char *binderservername;
+static char binderserverarg[] = "--binderserver";
+
+static String16 binderLibTestServiceName = String16("test.binderLib");
+
+enum BinderLibTestTranscationCode {
+    BINDER_LIB_TEST_NOP_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
+    BINDER_LIB_TEST_REGISTER_SERVER,
+    BINDER_LIB_TEST_ADD_SERVER,
+    BINDER_LIB_TEST_CALL_BACK,
+    BINDER_LIB_TEST_NOP_CALL_BACK,
+    BINDER_LIB_TEST_GET_ID_TRANSACTION,
+    BINDER_LIB_TEST_INDIRECT_TRANSACTION,
+    BINDER_LIB_TEST_SET_ERROR_TRANSACTION,
+    BINDER_LIB_TEST_GET_STATUS_TRANSACTION,
+    BINDER_LIB_TEST_ADD_STRONG_REF_TRANSACTION,
+    BINDER_LIB_TEST_LINK_DEATH_TRANSACTION,
+    BINDER_LIB_TEST_WRITE_FILE_TRANSACTION,
+    BINDER_LIB_TEST_PROMOTE_WEAK_REF_TRANSACTION,
+    BINDER_LIB_TEST_EXIT_TRANSACTION,
+    BINDER_LIB_TEST_DELAYED_EXIT_TRANSACTION,
+    BINDER_LIB_TEST_GET_PTR_SIZE_TRANSACTION,
+};
+
+pid_t start_server_process(int arg2)
+{
+    int ret;
+    pid_t pid;
+    status_t status;
+    int pipefd[2];
+    char stri[16];
+    char strpipefd1[16];
+    char *childargv[] = {
+        binderservername,
+        binderserverarg,
+        stri,
+        strpipefd1,
+        NULL
+    };
+
+    ret = pipe(pipefd);
+    if (ret < 0)
+        return ret;
+
+    snprintf(stri, sizeof(stri), "%d", arg2);
+    snprintf(strpipefd1, sizeof(strpipefd1), "%d", pipefd[1]);
+
+    pid = fork();
+    if (pid == -1)
+        return pid;
+    if (pid == 0) {
+        close(pipefd[0]);
+        execv(binderservername, childargv);
+        status = -errno;
+        write(pipefd[1], &status, sizeof(status));
+        fprintf(stderr, "execv failed, %s\n", strerror(errno));
+        _exit(EXIT_FAILURE);
+    }
+    close(pipefd[1]);
+    ret = read(pipefd[0], &status, sizeof(status));
+    //printf("pipe read returned %d, status %d\n", ret, status);
+    close(pipefd[0]);
+    if (ret == sizeof(status)) {
+        ret = status;
+    } else {
+        kill(pid, SIGKILL);
+        if (ret >= 0) {
+            ret = NO_INIT;
+        }
+    }
+    if (ret < 0) {
+        wait(NULL);
+        return ret;
+    }
+    return pid;
+}
+
+class BinderLibTestEnv : public ::testing::Environment {
+    public:
+        BinderLibTestEnv() {}
+        sp<IBinder> getServer(void) {
+            return m_server;
+        }
+
+    private:
+        virtual void SetUp() {
+            m_serverpid = start_server_process(0);
+            //printf("m_serverpid %d\n", m_serverpid);
+            ASSERT_GT(m_serverpid, 0);
+
+            sp<IServiceManager> sm = defaultServiceManager();
+            //printf("%s: pid %d, get service\n", __func__, m_pid);
+            m_server = sm->getService(binderLibTestServiceName);
+            ASSERT_TRUE(m_server != NULL);
+            //printf("%s: pid %d, get service done\n", __func__, m_pid);
+        }
+        virtual void TearDown() {
+            status_t ret;
+            Parcel data, reply;
+            int exitStatus;
+            pid_t pid;
+
+            //printf("%s: pid %d\n", __func__, m_pid);
+            if (m_server != NULL) {
+                ret = m_server->transact(BINDER_LIB_TEST_GET_STATUS_TRANSACTION, data, &reply);
+                EXPECT_EQ(0, ret);
+                ret = m_server->transact(BINDER_LIB_TEST_EXIT_TRANSACTION, data, &reply, TF_ONE_WAY);
+                EXPECT_EQ(0, ret);
+            }
+            if (m_serverpid > 0) {
+                //printf("wait for %d\n", m_pids[i]);
+                pid = wait(&exitStatus);
+                EXPECT_EQ(m_serverpid, pid);
+                EXPECT_TRUE(WIFEXITED(exitStatus));
+                EXPECT_EQ(0, WEXITSTATUS(exitStatus));
+            }
+        }
+
+        pid_t m_serverpid;
+        sp<IBinder> m_server;
+};
+
+class BinderLibTest : public ::testing::Test {
+    public:
+        virtual void SetUp() {
+            m_server = static_cast<BinderLibTestEnv *>(binder_env)->getServer();
+        }
+        virtual void TearDown() {
+        }
+    protected:
+        sp<IBinder> addServer(int32_t *idPtr = NULL)
+        {
+            int ret;
+            int32_t id;
+            Parcel data, reply;
+            sp<IBinder> binder;
+
+            ret = m_server->transact(BINDER_LIB_TEST_ADD_SERVER, data, &reply);
+            EXPECT_EQ(NO_ERROR, ret);
+
+            EXPECT_FALSE(binder != NULL);
+            binder = reply.readStrongBinder();
+            EXPECT_TRUE(binder != NULL);
+            ret = reply.readInt32(&id);
+            EXPECT_EQ(NO_ERROR, ret);
+            if (idPtr)
+                *idPtr = id;
+            return binder;
+        }
+        void waitForReadData(int fd, int timeout_ms) {
+            int ret;
+            pollfd pfd = pollfd();
+
+            pfd.fd = fd;
+            pfd.events = POLLIN;
+            ret = poll(&pfd, 1, timeout_ms);
+            EXPECT_EQ(1, ret);
+        }
+
+        sp<IBinder> m_server;
+};
+
+class BinderLibTestBundle : public Parcel
+{
+    public:
+        BinderLibTestBundle(void) {}
+        BinderLibTestBundle(const Parcel *source) : m_isValid(false) {
+            int32_t mark;
+            int32_t bundleLen;
+            size_t pos;
+
+            if (source->readInt32(&mark))
+                return;
+            if (mark != MARK_START)
+                return;
+            if (source->readInt32(&bundleLen))
+                return;
+            pos = source->dataPosition();
+            if (Parcel::appendFrom(source, pos, bundleLen))
+                return;
+            source->setDataPosition(pos + bundleLen);
+            if (source->readInt32(&mark))
+                return;
+            if (mark != MARK_END)
+                return;
+            m_isValid = true;
+            setDataPosition(0);
+        }
+        void appendTo(Parcel *dest) {
+            dest->writeInt32(MARK_START);
+            dest->writeInt32(dataSize());
+            dest->appendFrom(this, 0, dataSize());
+            dest->writeInt32(MARK_END);
+        };
+        bool isValid(void) {
+            return m_isValid;
+        }
+    private:
+        enum {
+            MARK_START  = B_PACK_CHARS('B','T','B','S'),
+            MARK_END    = B_PACK_CHARS('B','T','B','E'),
+        };
+        bool m_isValid;
+};
+
+class BinderLibTestEvent
+{
+    public:
+        BinderLibTestEvent(void)
+            : m_eventTriggered(false)
+        {
+            pthread_mutex_init(&m_waitMutex, NULL);
+            pthread_cond_init(&m_waitCond, NULL);
+        }
+        int waitEvent(int timeout_s)
+        {
+            int ret;
+            pthread_mutex_lock(&m_waitMutex);
+            if (!m_eventTriggered) {
+#if defined(HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE)
+                pthread_cond_timeout_np(&m_waitCond, &m_waitMutex, timeout_s * 1000);
+#else
+                struct timespec ts;
+                clock_gettime(CLOCK_REALTIME, &ts);
+                ts.tv_sec += timeout_s;
+                pthread_cond_timedwait(&m_waitCond, &m_waitMutex, &ts);
+#endif
+            }
+            ret = m_eventTriggered ? NO_ERROR : TIMED_OUT;
+            pthread_mutex_unlock(&m_waitMutex);
+            return ret;
+        }
+    protected:
+        void triggerEvent(void) {
+            pthread_mutex_lock(&m_waitMutex);
+            pthread_cond_signal(&m_waitCond);
+            m_eventTriggered = true;
+            pthread_mutex_unlock(&m_waitMutex);
+        };
+    private:
+        pthread_mutex_t m_waitMutex;
+        pthread_cond_t m_waitCond;
+        bool m_eventTriggered;
+};
+
+class BinderLibTestCallBack : public BBinder, public BinderLibTestEvent
+{
+    public:
+        BinderLibTestCallBack()
+            : m_result(NOT_ENOUGH_DATA)
+        {
+        }
+        status_t getResult(void)
+        {
+            return m_result;
+        }
+
+    private:
+        virtual status_t onTransact(uint32_t code,
+                                    const Parcel& data, Parcel* reply,
+                                    uint32_t flags = 0)
+        {
+            (void)reply;
+            (void)flags;
+            switch(code) {
+            case BINDER_LIB_TEST_CALL_BACK:
+                m_result = data.readInt32();
+                triggerEvent();
+                return NO_ERROR;
+            default:
+                return UNKNOWN_TRANSACTION;
+            }
+        }
+
+        status_t m_result;
+};
+
+class TestDeathRecipient : public IBinder::DeathRecipient, public BinderLibTestEvent
+{
+    private:
+        virtual void binderDied(const wp<IBinder>& who) {
+            (void)who;
+            triggerEvent();
+        };
+};
+
+TEST_F(BinderLibTest, NopTransaction) {
+    status_t ret;
+    Parcel data, reply;
+    ret = m_server->transact(BINDER_LIB_TEST_NOP_TRANSACTION, data, &reply);
+    EXPECT_EQ(NO_ERROR, ret);
+}
+
+TEST_F(BinderLibTest, SetError) {
+    int32_t testValue[] = { 0, -123, 123 };
+    for (size_t i = 0; i < ARRAY_SIZE(testValue); i++) {
+        status_t ret;
+        Parcel data, reply;
+        data.writeInt32(testValue[i]);
+        ret = m_server->transact(BINDER_LIB_TEST_SET_ERROR_TRANSACTION, data, &reply);
+        EXPECT_EQ(testValue[i], ret);
+    }
+}
+
+TEST_F(BinderLibTest, GetId) {
+    status_t ret;
+    int32_t id;
+    Parcel data, reply;
+    ret = m_server->transact(BINDER_LIB_TEST_GET_ID_TRANSACTION, data, &reply);
+    EXPECT_EQ(NO_ERROR, ret);
+    ret = reply.readInt32(&id);
+    EXPECT_EQ(NO_ERROR, ret);
+    EXPECT_EQ(0, id);
+}
+
+TEST_F(BinderLibTest, PtrSize) {
+    status_t ret;
+    int32_t ptrsize;
+    Parcel data, reply;
+    sp<IBinder> server = addServer();
+    ASSERT_TRUE(server != NULL);
+    ret = server->transact(BINDER_LIB_TEST_GET_PTR_SIZE_TRANSACTION, data, &reply);
+    EXPECT_EQ(NO_ERROR, ret);
+    ret = reply.readInt32(&ptrsize);
+    EXPECT_EQ(NO_ERROR, ret);
+    RecordProperty("TestPtrSize", sizeof(void *));
+    RecordProperty("ServerPtrSize", sizeof(void *));
+}
+
+TEST_F(BinderLibTest, IndirectGetId2)
+{
+    status_t ret;
+    int32_t id;
+    int32_t count;
+    Parcel data, reply;
+    int32_t serverId[3];
+
+    data.writeInt32(ARRAY_SIZE(serverId));
+    for (size_t i = 0; i < ARRAY_SIZE(serverId); i++) {
+        sp<IBinder> server;
+        BinderLibTestBundle datai;
+
+        server = addServer(&serverId[i]);
+        ASSERT_TRUE(server != NULL);
+        data.writeStrongBinder(server);
+        data.writeInt32(BINDER_LIB_TEST_GET_ID_TRANSACTION);
+        datai.appendTo(&data);
+    }
+
+    ret = m_server->transact(BINDER_LIB_TEST_INDIRECT_TRANSACTION, data, &reply);
+    ASSERT_EQ(NO_ERROR, ret);
+
+    ret = reply.readInt32(&id);
+    ASSERT_EQ(NO_ERROR, ret);
+    EXPECT_EQ(0, id);
+
+    ret = reply.readInt32(&count);
+    ASSERT_EQ(NO_ERROR, ret);
+    EXPECT_EQ(ARRAY_SIZE(serverId), count);
+
+    for (size_t i = 0; i < (size_t)count; i++) {
+        BinderLibTestBundle replyi(&reply);
+        EXPECT_TRUE(replyi.isValid());
+        ret = replyi.readInt32(&id);
+        EXPECT_EQ(NO_ERROR, ret);
+        EXPECT_EQ(serverId[i], id);
+        EXPECT_EQ(replyi.dataSize(), replyi.dataPosition());
+    }
+
+    EXPECT_EQ(reply.dataSize(), reply.dataPosition());
+}
+
+TEST_F(BinderLibTest, IndirectGetId3)
+{
+    status_t ret;
+    int32_t id;
+    int32_t count;
+    Parcel data, reply;
+    int32_t serverId[3];
+
+    data.writeInt32(ARRAY_SIZE(serverId));
+    for (size_t i = 0; i < ARRAY_SIZE(serverId); i++) {
+        sp<IBinder> server;
+        BinderLibTestBundle datai;
+        BinderLibTestBundle datai2;
+
+        server = addServer(&serverId[i]);
+        ASSERT_TRUE(server != NULL);
+        data.writeStrongBinder(server);
+        data.writeInt32(BINDER_LIB_TEST_INDIRECT_TRANSACTION);
+
+        datai.writeInt32(1);
+        datai.writeStrongBinder(m_server);
+        datai.writeInt32(BINDER_LIB_TEST_GET_ID_TRANSACTION);
+        datai2.appendTo(&datai);
+
+        datai.appendTo(&data);
+    }
+
+    ret = m_server->transact(BINDER_LIB_TEST_INDIRECT_TRANSACTION, data, &reply);
+    ASSERT_EQ(NO_ERROR, ret);
+
+    ret = reply.readInt32(&id);
+    ASSERT_EQ(NO_ERROR, ret);
+    EXPECT_EQ(0, id);
+
+    ret = reply.readInt32(&count);
+    ASSERT_EQ(NO_ERROR, ret);
+    EXPECT_EQ(ARRAY_SIZE(serverId), count);
+
+    for (size_t i = 0; i < (size_t)count; i++) {
+        int32_t counti;
+
+        BinderLibTestBundle replyi(&reply);
+        EXPECT_TRUE(replyi.isValid());
+        ret = replyi.readInt32(&id);
+        EXPECT_EQ(NO_ERROR, ret);
+        EXPECT_EQ(serverId[i], id);
+
+        ret = replyi.readInt32(&counti);
+        ASSERT_EQ(NO_ERROR, ret);
+        EXPECT_EQ(1, counti);
+
+        BinderLibTestBundle replyi2(&replyi);
+        EXPECT_TRUE(replyi2.isValid());
+        ret = replyi2.readInt32(&id);
+        EXPECT_EQ(NO_ERROR, ret);
+        EXPECT_EQ(0, id);
+        EXPECT_EQ(replyi2.dataSize(), replyi2.dataPosition());
+
+        EXPECT_EQ(replyi.dataSize(), replyi.dataPosition());
+    }
+
+    EXPECT_EQ(reply.dataSize(), reply.dataPosition());
+}
+
+TEST_F(BinderLibTest, CallBack)
+{
+    status_t ret;
+    Parcel data, reply;
+    sp<BinderLibTestCallBack> callBack = new BinderLibTestCallBack();
+    data.writeStrongBinder(callBack);
+    ret = m_server->transact(BINDER_LIB_TEST_NOP_CALL_BACK, data, &reply, TF_ONE_WAY);
+    EXPECT_EQ(NO_ERROR, ret);
+    ret = callBack->waitEvent(5);
+    EXPECT_EQ(NO_ERROR, ret);
+    ret = callBack->getResult();
+    EXPECT_EQ(NO_ERROR, ret);
+}
+
+TEST_F(BinderLibTest, AddServer)
+{
+    sp<IBinder> server = addServer();
+    ASSERT_TRUE(server != NULL);
+}
+
+TEST_F(BinderLibTest, DeathNotificationNoRefs)
+{
+    status_t ret;
+
+    sp<TestDeathRecipient> testDeathRecipient = new TestDeathRecipient();
+
+    {
+        sp<IBinder> binder = addServer();
+        ASSERT_TRUE(binder != NULL);
+        ret = binder->linkToDeath(testDeathRecipient);
+        EXPECT_EQ(NO_ERROR, ret);
+    }
+    IPCThreadState::self()->flushCommands();
+    ret = testDeathRecipient->waitEvent(5);
+    EXPECT_EQ(NO_ERROR, ret);
+#if 0 /* Is there an unlink api that does not require a strong reference? */
+    ret = binder->unlinkToDeath(testDeathRecipient);
+    EXPECT_EQ(NO_ERROR, ret);
+#endif
+}
+
+TEST_F(BinderLibTest, DeathNotificationWeakRef)
+{
+    status_t ret;
+    wp<IBinder> wbinder;
+
+    sp<TestDeathRecipient> testDeathRecipient = new TestDeathRecipient();
+
+    {
+        sp<IBinder> binder = addServer();
+        ASSERT_TRUE(binder != NULL);
+        ret = binder->linkToDeath(testDeathRecipient);
+        EXPECT_EQ(NO_ERROR, ret);
+        wbinder = binder;
+    }
+    IPCThreadState::self()->flushCommands();
+    ret = testDeathRecipient->waitEvent(5);
+    EXPECT_EQ(NO_ERROR, ret);
+#if 0 /* Is there an unlink api that does not require a strong reference? */
+    ret = binder->unlinkToDeath(testDeathRecipient);
+    EXPECT_EQ(NO_ERROR, ret);
+#endif
+}
+
+TEST_F(BinderLibTest, DeathNotificationStrongRef)
+{
+    status_t ret;
+    sp<IBinder> sbinder;
+
+    sp<TestDeathRecipient> testDeathRecipient = new TestDeathRecipient();
+
+    {
+        sp<IBinder> binder = addServer();
+        ASSERT_TRUE(binder != NULL);
+        ret = binder->linkToDeath(testDeathRecipient);
+        EXPECT_EQ(NO_ERROR, ret);
+        sbinder = binder;
+    }
+    {
+        Parcel data, reply;
+        ret = sbinder->transact(BINDER_LIB_TEST_EXIT_TRANSACTION, data, &reply, TF_ONE_WAY);
+        EXPECT_EQ(0, ret);
+    }
+    IPCThreadState::self()->flushCommands();
+    ret = testDeathRecipient->waitEvent(5);
+    EXPECT_EQ(NO_ERROR, ret);
+    ret = sbinder->unlinkToDeath(testDeathRecipient);
+    EXPECT_EQ(DEAD_OBJECT, ret);
+}
+
+TEST_F(BinderLibTest, DeathNotificationMultiple)
+{
+    status_t ret;
+    const int clientcount = 2;
+    sp<IBinder> target;
+    sp<IBinder> linkedclient[clientcount];
+    sp<BinderLibTestCallBack> callBack[clientcount];
+    sp<IBinder> passiveclient[clientcount];
+
+    target = addServer();
+    ASSERT_TRUE(target != NULL);
+    for (int i = 0; i < clientcount; i++) {
+        {
+            Parcel data, reply;
+
+            linkedclient[i] = addServer();
+            ASSERT_TRUE(linkedclient[i] != NULL);
+            callBack[i] = new BinderLibTestCallBack();
+            data.writeStrongBinder(target);
+            data.writeStrongBinder(callBack[i]);
+            ret = linkedclient[i]->transact(BINDER_LIB_TEST_LINK_DEATH_TRANSACTION, data, &reply, TF_ONE_WAY);
+            EXPECT_EQ(NO_ERROR, ret);
+        }
+        {
+            Parcel data, reply;
+
+            passiveclient[i] = addServer();
+            ASSERT_TRUE(passiveclient[i] != NULL);
+            data.writeStrongBinder(target);
+            ret = passiveclient[i]->transact(BINDER_LIB_TEST_ADD_STRONG_REF_TRANSACTION, data, &reply, TF_ONE_WAY);
+            EXPECT_EQ(NO_ERROR, ret);
+        }
+    }
+    {
+        Parcel data, reply;
+        ret = target->transact(BINDER_LIB_TEST_EXIT_TRANSACTION, data, &reply, TF_ONE_WAY);
+        EXPECT_EQ(0, ret);
+    }
+
+    for (int i = 0; i < clientcount; i++) {
+        ret = callBack[i]->waitEvent(5);
+        EXPECT_EQ(NO_ERROR, ret);
+        ret = callBack[i]->getResult();
+        EXPECT_EQ(NO_ERROR, ret);
+    }
+}
+
+TEST_F(BinderLibTest, PassFile) {
+    int ret;
+    int pipefd[2];
+    uint8_t buf[1] = { 0 };
+    uint8_t write_value = 123;
+
+    ret = pipe2(pipefd, O_NONBLOCK);
+    ASSERT_EQ(0, ret);
+
+    {
+        Parcel data, reply;
+        uint8_t writebuf[1] = { write_value };
+
+        ret = data.writeFileDescriptor(pipefd[1], true);
+        EXPECT_EQ(NO_ERROR, ret);
+
+        ret = data.writeInt32(sizeof(writebuf));
+        EXPECT_EQ(NO_ERROR, ret);
+
+        ret = data.write(writebuf, sizeof(writebuf));
+        EXPECT_EQ(NO_ERROR, ret);
+
+        ret = m_server->transact(BINDER_LIB_TEST_WRITE_FILE_TRANSACTION, data, &reply);
+        EXPECT_EQ(NO_ERROR, ret);
+    }
+
+    ret = read(pipefd[0], buf, sizeof(buf));
+    EXPECT_EQ(sizeof(buf), ret);
+    EXPECT_EQ(write_value, buf[0]);
+
+    waitForReadData(pipefd[0], 5000); /* wait for other proccess to close pipe */
+
+    ret = read(pipefd[0], buf, sizeof(buf));
+    EXPECT_EQ(0, ret);
+
+    close(pipefd[0]);
+}
+
+TEST_F(BinderLibTest, PromoteLocal) {
+    sp<IBinder> strong = new BBinder();
+    wp<IBinder> weak = strong;
+    sp<IBinder> strong_from_weak = weak.promote();
+    EXPECT_TRUE(strong != NULL);
+    EXPECT_EQ(strong, strong_from_weak);
+    strong = NULL;
+    strong_from_weak = NULL;
+    strong_from_weak = weak.promote();
+    EXPECT_TRUE(strong_from_weak == NULL);
+}
+
+TEST_F(BinderLibTest, PromoteRemote) {
+    int ret;
+    Parcel data, reply;
+    sp<IBinder> strong = new BBinder();
+    sp<IBinder> server = addServer();
+
+    ASSERT_TRUE(server != NULL);
+    ASSERT_TRUE(strong != NULL);
+
+    ret = data.writeWeakBinder(strong);
+    EXPECT_EQ(NO_ERROR, ret);
+
+    ret = server->transact(BINDER_LIB_TEST_PROMOTE_WEAK_REF_TRANSACTION, data, &reply);
+    EXPECT_GE(ret, 0);
+}
+
+class BinderLibTestService : public BBinder
+{
+    public:
+        BinderLibTestService(int32_t id)
+            : m_id(id)
+            , m_nextServerId(id + 1)
+            , m_serverStartRequested(false)
+        {
+            pthread_mutex_init(&m_serverWaitMutex, NULL);
+            pthread_cond_init(&m_serverWaitCond, NULL);
+        }
+        ~BinderLibTestService()
+        {
+            exit(EXIT_SUCCESS);
+        }
+        virtual status_t onTransact(uint32_t code,
+                                    const Parcel& data, Parcel* reply,
+                                    uint32_t flags = 0) {
+            //printf("%s: code %d\n", __func__, code);
+            (void)flags;
+
+            if (getuid() != (uid_t)IPCThreadState::self()->getCallingUid()) {
+                return PERMISSION_DENIED;
+            }
+            switch (code) {
+            case BINDER_LIB_TEST_REGISTER_SERVER: {
+                int32_t id;
+                sp<IBinder> binder;
+                id = data.readInt32();
+                binder = data.readStrongBinder();
+                if (binder == NULL) {
+                    return BAD_VALUE;
+                }
+
+                if (m_id != 0)
+                    return INVALID_OPERATION;
+
+                pthread_mutex_lock(&m_serverWaitMutex);
+                if (m_serverStartRequested) {
+                    m_serverStartRequested = false;
+                    m_serverStarted = binder;
+                    pthread_cond_signal(&m_serverWaitCond);
+                }
+                pthread_mutex_unlock(&m_serverWaitMutex);
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_ADD_SERVER: {
+                int ret;
+                uint8_t buf[1] = { 0 };
+                int serverid;
+
+                if (m_id != 0) {
+                    return INVALID_OPERATION;
+                }
+                pthread_mutex_lock(&m_serverWaitMutex);
+                if (m_serverStartRequested) {
+                    ret = -EBUSY;
+                } else {
+                    serverid = m_nextServerId++;
+                    m_serverStartRequested = true;
+
+                    pthread_mutex_unlock(&m_serverWaitMutex);
+                    ret = start_server_process(serverid);
+                    pthread_mutex_lock(&m_serverWaitMutex);
+                }
+                if (ret > 0) {
+                    if (m_serverStartRequested) {
+#if defined(HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE)
+                        ret = pthread_cond_timeout_np(&m_serverWaitCond, &m_serverWaitMutex, 5000);
+#else
+                        struct timespec ts;
+                        clock_gettime(CLOCK_REALTIME, &ts);
+                        ts.tv_sec += 5;
+                        ret = pthread_cond_timedwait(&m_serverWaitCond, &m_serverWaitMutex, &ts);
+#endif
+                    }
+                    if (m_serverStartRequested) {
+                        m_serverStartRequested = false;
+                        ret = -ETIMEDOUT;
+                    } else {
+                        reply->writeStrongBinder(m_serverStarted);
+                        reply->writeInt32(serverid);
+                        m_serverStarted = NULL;
+                        ret = NO_ERROR;
+                    }
+                } else if (ret >= 0) {
+                    m_serverStartRequested = false;
+                    ret = UNKNOWN_ERROR;
+                }
+                pthread_mutex_unlock(&m_serverWaitMutex);
+                return ret;
+            }
+            case BINDER_LIB_TEST_NOP_TRANSACTION:
+                return NO_ERROR;
+            case BINDER_LIB_TEST_NOP_CALL_BACK: {
+                Parcel data2, reply2;
+                sp<IBinder> binder;
+                binder = data.readStrongBinder();
+                if (binder == NULL) {
+                    return BAD_VALUE;
+                }
+                reply2.writeInt32(NO_ERROR);
+                binder->transact(BINDER_LIB_TEST_CALL_BACK, data2, &reply2);
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_GET_ID_TRANSACTION:
+                reply->writeInt32(m_id);
+                return NO_ERROR;
+            case BINDER_LIB_TEST_INDIRECT_TRANSACTION: {
+                int32_t count;
+                uint32_t indirect_code;
+                sp<IBinder> binder;
+
+                count = data.readInt32();
+                reply->writeInt32(m_id);
+                reply->writeInt32(count);
+                for (int i = 0; i < count; i++) {
+                    binder = data.readStrongBinder();
+                    if (binder == NULL) {
+                        return BAD_VALUE;
+                    }
+                    indirect_code = data.readInt32();
+                    BinderLibTestBundle data2(&data);
+                    if (!data2.isValid()) {
+                        return BAD_VALUE;
+                    }
+                    BinderLibTestBundle reply2;
+                    binder->transact(indirect_code, data2, &reply2);
+                    reply2.appendTo(reply);
+                }
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_SET_ERROR_TRANSACTION:
+                reply->setError(data.readInt32());
+                return NO_ERROR;
+            case BINDER_LIB_TEST_GET_PTR_SIZE_TRANSACTION:
+                reply->writeInt32(sizeof(void *));
+                return NO_ERROR;
+            case BINDER_LIB_TEST_GET_STATUS_TRANSACTION:
+                return NO_ERROR;
+            case BINDER_LIB_TEST_ADD_STRONG_REF_TRANSACTION:
+                m_strongRef = data.readStrongBinder();
+                return NO_ERROR;
+            case BINDER_LIB_TEST_LINK_DEATH_TRANSACTION: {
+                int ret;
+                Parcel data2, reply2;
+                sp<TestDeathRecipient> testDeathRecipient = new TestDeathRecipient();
+                sp<IBinder> target;
+                sp<IBinder> callback;
+
+                target = data.readStrongBinder();
+                if (target == NULL) {
+                    return BAD_VALUE;
+                }
+                callback = data.readStrongBinder();
+                if (callback == NULL) {
+                    return BAD_VALUE;
+                }
+                ret = target->linkToDeath(testDeathRecipient);
+                if (ret == NO_ERROR)
+                    ret = testDeathRecipient->waitEvent(5);
+                data2.writeInt32(ret);
+                callback->transact(BINDER_LIB_TEST_CALL_BACK, data2, &reply2);
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_WRITE_FILE_TRANSACTION: {
+                int ret;
+                int32_t size;
+                const void *buf;
+                int fd;
+
+                fd = data.readFileDescriptor();
+                if (fd < 0) {
+                    return BAD_VALUE;
+                }
+                ret = data.readInt32(&size);
+                if (ret != NO_ERROR) {
+                    return ret;
+                }
+                buf = data.readInplace(size);
+                if (buf == NULL) {
+                    return BAD_VALUE;
+                }
+                ret = write(fd, buf, size);
+                if (ret != size)
+                    return UNKNOWN_ERROR;
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_PROMOTE_WEAK_REF_TRANSACTION: {
+                int ret;
+                wp<IBinder> weak;
+                sp<IBinder> strong;
+                Parcel data2, reply2;
+                sp<IServiceManager> sm = defaultServiceManager();
+                sp<IBinder> server = sm->getService(binderLibTestServiceName);
+
+                weak = data.readWeakBinder();
+                if (weak == NULL) {
+                    return BAD_VALUE;
+                }
+                strong = weak.promote();
+
+                ret = server->transact(BINDER_LIB_TEST_NOP_TRANSACTION, data2, &reply2);
+                if (ret != NO_ERROR)
+                    exit(EXIT_FAILURE);
+
+                if (strong == NULL) {
+                    reply->setError(1);
+                }
+                return NO_ERROR;
+            }
+            case BINDER_LIB_TEST_DELAYED_EXIT_TRANSACTION:
+                alarm(10);
+                return NO_ERROR;
+            case BINDER_LIB_TEST_EXIT_TRANSACTION:
+                while (wait(NULL) != -1 || errno != ECHILD)
+                    ;
+                exit(EXIT_SUCCESS);
+            default:
+                return UNKNOWN_TRANSACTION;
+            };
+        }
+    private:
+        int32_t m_id;
+        int32_t m_nextServerId;
+        pthread_mutex_t m_serverWaitMutex;
+        pthread_cond_t m_serverWaitCond;
+        bool m_serverStartRequested;
+        sp<IBinder> m_serverStarted;
+        sp<IBinder> m_strongRef;
+};
+
+int run_server(int index, int readypipefd)
+{
+    status_t ret;
+    sp<IServiceManager> sm = defaultServiceManager();
+    {
+        sp<BinderLibTestService> testService = new BinderLibTestService(index);
+        if (index == 0) {
+            ret = sm->addService(binderLibTestServiceName, testService);
+        } else {
+            sp<IBinder> server = sm->getService(binderLibTestServiceName);
+            Parcel data, reply;
+            data.writeInt32(index);
+            data.writeStrongBinder(testService);
+
+            ret = server->transact(BINDER_LIB_TEST_REGISTER_SERVER, data, &reply);
+        }
+    }
+    write(readypipefd, &ret, sizeof(ret));
+    close(readypipefd);
+    //printf("%s: ret %d\n", __func__, ret);
+    if (ret)
+        return 1;
+    //printf("%s: joinThreadPool\n", __func__);
+    ProcessState::self()->startThreadPool();
+    IPCThreadState::self()->joinThreadPool();
+    //printf("%s: joinThreadPool returned\n", __func__);
+    return 1; /* joinThreadPool should not return */
+}
+
+int main(int argc, char **argv) {
+    int ret;
+
+    if (argc == 3 && !strcmp(argv[1], "--servername")) {
+        binderservername = argv[2];
+    } else {
+        binderservername = argv[0];
+    }
+
+    if (argc == 4 && !strcmp(argv[1], binderserverarg)) {
+        return run_server(atoi(argv[2]), atoi(argv[3]));
+    }
+
+    ::testing::InitGoogleTest(&argc, argv);
+    binder_env = AddGlobalTestEnvironment(new BinderLibTestEnv());
+    ProcessState::self()->startThreadPool();
+    return RUN_ALL_TESTS();
+}
+