| /* |
| * Copyright (C) 2016 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. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "android_os_HwBinder" |
| #include <android-base/logging.h> |
| |
| #include "android_os_HwBinder.h" |
| |
| #include "android_os_HwParcel.h" |
| #include "android_os_HwRemoteBinder.h" |
| |
| #include <cstring> |
| |
| #include <JNIHelp.h> |
| #include <android/hidl/manager/1.0/IServiceManager.h> |
| #include <android/hidl/base/1.0/IBase.h> |
| #include <android/hidl/base/1.0/BpHwBase.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include <hidl/ServiceManagement.h> |
| #include <hidl/Status.h> |
| #include <hidl/HidlTransportSupport.h> |
| #include <hwbinder/ProcessState.h> |
| #include <nativehelper/ScopedLocalRef.h> |
| #include <vintf/parse_string.h> |
| |
| #include "core_jni_helpers.h" |
| |
| using android::AndroidRuntime; |
| using android::hardware::hidl_vec; |
| using android::hardware::hidl_string; |
| using android::hardware::IPCThreadState; |
| using android::hardware::ProcessState; |
| template<typename T> |
| using Return = android::hardware::Return<T>; |
| |
| #define PACKAGE_PATH "android/os" |
| #define CLASS_NAME "HwBinder" |
| #define CLASS_PATH PACKAGE_PATH "/" CLASS_NAME |
| |
| namespace android { |
| |
| static jclass gErrorClass; |
| |
| static struct fields_t { |
| jfieldID contextID; |
| jmethodID onTransactID; |
| } gFields; |
| |
| struct JHwBinderHolder : public RefBase { |
| JHwBinderHolder() {} |
| |
| sp<JHwBinder> get(JNIEnv *env, jobject obj) { |
| Mutex::Autolock autoLock(mLock); |
| |
| sp<JHwBinder> binder = mBinder.promote(); |
| |
| if (binder == NULL) { |
| binder = new JHwBinder(env, obj); |
| mBinder = binder; |
| } |
| |
| return binder; |
| } |
| |
| private: |
| Mutex mLock; |
| wp<JHwBinder> mBinder; |
| |
| DISALLOW_COPY_AND_ASSIGN(JHwBinderHolder); |
| }; |
| |
| // static |
| void JHwBinder::InitClass(JNIEnv *env) { |
| ScopedLocalRef<jclass> clazz( |
| env, FindClassOrDie(env, CLASS_PATH)); |
| |
| gFields.contextID = |
| GetFieldIDOrDie(env, clazz.get(), "mNativeContext", "J"); |
| |
| gFields.onTransactID = |
| GetMethodIDOrDie( |
| env, |
| clazz.get(), |
| "onTransact", |
| "(IL" PACKAGE_PATH "/HwParcel;L" PACKAGE_PATH "/HwParcel;I)V"); |
| } |
| |
| // static |
| sp<JHwBinderHolder> JHwBinder::SetNativeContext( |
| JNIEnv *env, jobject thiz, const sp<JHwBinderHolder> &context) { |
| sp<JHwBinderHolder> old = |
| (JHwBinderHolder *)env->GetLongField(thiz, gFields.contextID); |
| |
| if (context != NULL) { |
| context->incStrong(NULL /* id */); |
| } |
| |
| if (old != NULL) { |
| old->decStrong(NULL /* id */); |
| } |
| |
| env->SetLongField(thiz, gFields.contextID, (long)context.get()); |
| |
| return old; |
| } |
| |
| // static |
| sp<JHwBinder> JHwBinder::GetNativeBinder( |
| JNIEnv *env, jobject thiz) { |
| JHwBinderHolder *holder = |
| reinterpret_cast<JHwBinderHolder *>( |
| env->GetLongField(thiz, gFields.contextID)); |
| |
| return holder->get(env, thiz); |
| } |
| |
| JHwBinder::JHwBinder(JNIEnv *env, jobject thiz) { |
| jclass clazz = env->GetObjectClass(thiz); |
| CHECK(clazz != NULL); |
| |
| mObject = env->NewGlobalRef(thiz); |
| } |
| |
| JHwBinder::~JHwBinder() { |
| JNIEnv *env = AndroidRuntime::getJNIEnv(); |
| |
| env->DeleteGlobalRef(mObject); |
| mObject = NULL; |
| } |
| |
| status_t JHwBinder::onTransact( |
| uint32_t code, |
| const hardware::Parcel &data, |
| hardware::Parcel *reply, |
| uint32_t flags, |
| TransactCallback callback) { |
| JNIEnv *env = AndroidRuntime::getJNIEnv(); |
| bool isOneway = (flags & TF_ONE_WAY) != 0; |
| ScopedLocalRef<jobject> replyObj(env, nullptr); |
| sp<JHwParcel> replyContext = nullptr; |
| |
| ScopedLocalRef<jobject> requestObj(env, JHwParcel::NewObject(env)); |
| JHwParcel::GetNativeContext(env, requestObj.get())->setParcel( |
| const_cast<hardware::Parcel *>(&data), false /* assumeOwnership */); |
| |
| |
| if (!isOneway) { |
| replyObj.reset(JHwParcel::NewObject(env)); |
| |
| replyContext = JHwParcel::GetNativeContext(env, replyObj.get()); |
| |
| replyContext->setParcel(reply, false /* assumeOwnership */); |
| replyContext->setTransactCallback(callback); |
| } |
| |
| env->CallVoidMethod( |
| mObject, |
| gFields.onTransactID, |
| code, |
| requestObj.get(), |
| replyObj.get(), |
| flags); |
| |
| if (env->ExceptionCheck()) { |
| jthrowable excep = env->ExceptionOccurred(); |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| |
| // It is illegal to call IsInstanceOf if there is a pending exception. |
| // Attempting to do so results in a JniAbort which crashes the entire process. |
| if (env->IsInstanceOf(excep, gErrorClass)) { |
| /* It's an error */ |
| LOG(ERROR) << "Forcefully exiting"; |
| exit(1); |
| } else { |
| LOG(ERROR) << "Uncaught exception!"; |
| } |
| |
| env->DeleteLocalRef(excep); |
| } |
| |
| status_t err = OK; |
| |
| if (!isOneway) { |
| if (!replyContext->wasSent()) { |
| // The implementation never finished the transaction. |
| err = UNKNOWN_ERROR; // XXX special error code instead? |
| |
| reply->setDataPosition(0 /* pos */); |
| } |
| |
| // Release all temporary storage now that scatter-gather data |
| // has been consolidated, either by calling the TransactCallback, |
| // if wasSent() == true or clearing the reply parcel (setDataOffset above). |
| replyContext->getStorage()->release(env); |
| |
| // We cannot permanently pass ownership of "data" and "reply" over to their |
| // Java object wrappers (we don't own them ourselves). |
| replyContext->setParcel( |
| NULL /* parcel */, false /* assumeOwnership */); |
| |
| } |
| |
| JHwParcel::GetNativeContext(env, requestObj.get())->setParcel( |
| NULL /* parcel */, false /* assumeOwnership */); |
| |
| return err; |
| } |
| |
| } // namespace android |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| using namespace android; |
| |
| static void releaseNativeContext(void *nativeContext) { |
| sp<JHwBinderHolder> context = static_cast<JHwBinderHolder *>(nativeContext); |
| |
| if (context != NULL) { |
| context->decStrong(NULL /* id */); |
| } |
| } |
| |
| static jlong JHwBinder_native_init(JNIEnv *env) { |
| JHwBinder::InitClass(env); |
| |
| return reinterpret_cast<jlong>(&releaseNativeContext); |
| } |
| |
| static void JHwBinder_native_setup(JNIEnv *env, jobject thiz) { |
| sp<JHwBinderHolder> context = new JHwBinderHolder; |
| JHwBinder::SetNativeContext(env, thiz, context); |
| } |
| |
| static void JHwBinder_native_transact( |
| JNIEnv * /* env */, |
| jobject /* thiz */, |
| jint /* code */, |
| jobject /* requestObj */, |
| jobject /* replyObj */, |
| jint /* flags */) { |
| CHECK(!"Should not be here"); |
| } |
| |
| static void JHwBinder_native_registerService( |
| JNIEnv *env, |
| jobject thiz, |
| jstring serviceNameObj) { |
| if (serviceNameObj == NULL) { |
| jniThrowException(env, "java/lang/NullPointerException", NULL); |
| return; |
| } |
| |
| const char *serviceName = env->GetStringUTFChars(serviceNameObj, NULL); |
| if (serviceName == NULL) { |
| return; // XXX exception already pending? |
| } |
| |
| sp<hardware::IBinder> binder = JHwBinder::GetNativeBinder(env, thiz); |
| |
| /* TODO(b/33440494) this is not right */ |
| sp<hidl::base::V1_0::IBase> base = new hidl::base::V1_0::BpHwBase(binder); |
| |
| auto manager = hardware::defaultServiceManager(); |
| |
| if (manager == nullptr) { |
| LOG(ERROR) << "Could not get hwservicemanager."; |
| signalExceptionForError(env, UNKNOWN_ERROR, true /* canThrowRemoteException */); |
| return; |
| } |
| |
| Return<bool> ret = manager->add(serviceName, base); |
| |
| env->ReleaseStringUTFChars(serviceNameObj, serviceName); |
| serviceName = NULL; |
| |
| bool ok = ret.isOk() && ret; |
| |
| if (ok) { |
| LOG(INFO) << "Starting thread pool."; |
| ::android::hardware::ProcessState::self()->startThreadPool(); |
| } |
| |
| signalExceptionForError(env, (ok ? OK : UNKNOWN_ERROR), true /* canThrowRemoteException */); |
| } |
| |
| static jobject JHwBinder_native_getService( |
| JNIEnv *env, |
| jclass /* clazzObj */, |
| jstring ifaceNameObj, |
| jstring serviceNameObj) { |
| |
| using ::android::hidl::base::V1_0::IBase; |
| using ::android::hidl::manager::V1_0::IServiceManager; |
| |
| if (ifaceNameObj == NULL) { |
| jniThrowException(env, "java/lang/NullPointerException", NULL); |
| return NULL; |
| } |
| if (serviceNameObj == NULL) { |
| jniThrowException(env, "java/lang/NullPointerException", NULL); |
| return NULL; |
| } |
| |
| auto manager = hardware::defaultServiceManager(); |
| |
| if (manager == nullptr) { |
| LOG(ERROR) << "Could not get hwservicemanager."; |
| signalExceptionForError(env, UNKNOWN_ERROR, true /* canThrowRemoteException */); |
| return NULL; |
| } |
| |
| const char *ifaceNameCStr = env->GetStringUTFChars(ifaceNameObj, NULL); |
| if (ifaceNameCStr == NULL) { |
| return NULL; // XXX exception already pending? |
| } |
| std::string ifaceName(ifaceNameCStr); |
| env->ReleaseStringUTFChars(ifaceNameObj, ifaceNameCStr); |
| ::android::hardware::hidl_string ifaceNameHStr; |
| ifaceNameHStr.setToExternal(ifaceName.c_str(), ifaceName.size()); |
| |
| const char *serviceNameCStr = env->GetStringUTFChars(serviceNameObj, NULL); |
| if (serviceNameCStr == NULL) { |
| return NULL; // XXX exception already pending? |
| } |
| std::string serviceName(serviceNameCStr); |
| env->ReleaseStringUTFChars(serviceNameObj, serviceNameCStr); |
| ::android::hardware::hidl_string serviceNameHStr; |
| serviceNameHStr.setToExternal(serviceName.c_str(), serviceName.size()); |
| |
| LOG(INFO) << "Looking for service " |
| << ifaceName |
| << "/" |
| << serviceName; |
| |
| Return<IServiceManager::Transport> transportRet = |
| manager->getTransport(ifaceNameHStr, serviceNameHStr); |
| |
| if (!transportRet.isOk()) { |
| signalExceptionForError(env, UNKNOWN_ERROR, true /* canThrowRemoteException */); |
| return NULL; |
| } |
| |
| IServiceManager::Transport transport = transportRet; |
| |
| #ifdef __ANDROID_TREBLE__ |
| #ifdef __ANDROID_DEBUGGABLE__ |
| const char* testingOverride = std::getenv("TREBLE_TESTING_OVERRIDE"); |
| const bool vintfLegacy = (transport == IServiceManager::Transport::EMPTY) |
| && testingOverride && !strcmp(testingOverride, "true"); |
| #else // __ANDROID_TREBLE__ but not __ANDROID_DEBUGGABLE__ |
| const bool vintfLegacy = false; |
| #endif // __ANDROID_DEBUGGABLE__ |
| #else // not __ANDROID_TREBLE__ |
| const bool vintfLegacy = (transport == IServiceManager::Transport::EMPTY); |
| #endif // __ANDROID_TREBLE__"; |
| |
| if (transport != IServiceManager::Transport::HWBINDER && !vintfLegacy) { |
| LOG(ERROR) << "service " << ifaceName << " declares transport method " |
| << toString(transport) << " but framework expects hwbinder."; |
| signalExceptionForError(env, NAME_NOT_FOUND, true /* canThrowRemoteException */); |
| return NULL; |
| } |
| |
| Return<sp<hidl::base::V1_0::IBase>> ret = manager->get(ifaceNameHStr, serviceNameHStr); |
| |
| if (!ret.isOk()) { |
| signalExceptionForError(env, UNKNOWN_ERROR, true /* canThrowRemoteException */); |
| return NULL; |
| } |
| |
| sp<hardware::IBinder> service = hardware::toBinder< |
| hidl::base::V1_0::IBase, hidl::base::V1_0::BpHwBase>(ret); |
| |
| if (service == NULL) { |
| signalExceptionForError(env, NAME_NOT_FOUND); |
| return NULL; |
| } |
| |
| LOG(INFO) << "Starting thread pool."; |
| ::android::hardware::ProcessState::self()->startThreadPool(); |
| |
| return JHwRemoteBinder::NewObject(env, service); |
| } |
| |
| void JHwBinder_native_configureRpcThreadpool(jlong maxThreads, jboolean callerWillJoin) { |
| CHECK(maxThreads > 0); |
| ProcessState::self()->setThreadPoolConfiguration(maxThreads, callerWillJoin /*callerJoinsPool*/); |
| } |
| |
| void JHwBinder_native_joinRpcThreadpool() { |
| IPCThreadState::self()->joinThreadPool(); |
| } |
| |
| static JNINativeMethod gMethods[] = { |
| { "native_init", "()J", (void *)JHwBinder_native_init }, |
| { "native_setup", "()V", (void *)JHwBinder_native_setup }, |
| |
| { "transact", |
| "(IL" PACKAGE_PATH "/HwParcel;L" PACKAGE_PATH "/HwParcel;I)V", |
| (void *)JHwBinder_native_transact }, |
| |
| { "registerService", "(Ljava/lang/String;)V", |
| (void *)JHwBinder_native_registerService }, |
| |
| { "getService", "(Ljava/lang/String;Ljava/lang/String;)L" PACKAGE_PATH "/IHwBinder;", |
| (void *)JHwBinder_native_getService }, |
| |
| { "configureRpcThreadpool", "(JZ)V", |
| (void *)JHwBinder_native_configureRpcThreadpool }, |
| |
| { "joinRpcThreadpool", "()V", |
| (void *)JHwBinder_native_joinRpcThreadpool }, |
| }; |
| |
| namespace android { |
| |
| int register_android_os_HwBinder(JNIEnv *env) { |
| jclass errorClass = FindClassOrDie(env, "java/lang/Error"); |
| gErrorClass = MakeGlobalRefOrDie(env, errorClass); |
| |
| return RegisterMethodsOrDie(env, CLASS_PATH, gMethods, NELEM(gMethods)); |
| } |
| |
| } // namespace android |