| /* |
| * Copyright (C) 2007 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 <dlfcn.h> |
| #include <pthread.h> |
| |
| #include <chrono> |
| #include <thread> |
| |
| #include <jni.h> |
| #include <nativehelper/JNIHelp.h> |
| |
| #include <binder/IServiceManager.h> |
| #include <hidl/HidlTransportSupport.h> |
| |
| #include <schedulerservice/SchedulingPolicyService.h> |
| #include <sensorservice/SensorService.h> |
| #include <sensorservicehidl/SensorManager.h> |
| |
| #include <bionic/malloc.h> |
| #include <bionic/reserved_signals.h> |
| |
| #include <android-base/properties.h> |
| #include <cutils/properties.h> |
| #include <utils/Log.h> |
| #include <utils/misc.h> |
| #include <utils/AndroidThreads.h> |
| |
| using android::base::GetIntProperty; |
| using namespace std::chrono_literals; |
| |
| namespace android { |
| |
| static void android_server_SystemServer_startSensorService(JNIEnv* /* env */, jobject /* clazz */) { |
| char propBuf[PROPERTY_VALUE_MAX]; |
| property_get("system_init.startsensorservice", propBuf, "1"); |
| if (strcmp(propBuf, "1") == 0) { |
| SensorService::publish(false /* allowIsolated */, |
| IServiceManager::DUMP_FLAG_PRIORITY_CRITICAL); |
| } |
| |
| } |
| |
| static void android_server_SystemServer_startHidlServices(JNIEnv* env, jobject /* clazz */) { |
| using ::android::frameworks::schedulerservice::V1_0::ISchedulingPolicyService; |
| using ::android::frameworks::schedulerservice::V1_0::implementation::SchedulingPolicyService; |
| using ::android::frameworks::sensorservice::V1_0::ISensorManager; |
| using ::android::frameworks::sensorservice::V1_0::implementation::SensorManager; |
| using ::android::hardware::configureRpcThreadpool; |
| |
| status_t err; |
| |
| configureRpcThreadpool(5, false /* callerWillJoin */); |
| |
| JavaVM *vm; |
| LOG_ALWAYS_FATAL_IF(env->GetJavaVM(&vm) != JNI_OK, "Cannot get Java VM"); |
| |
| sp<ISensorManager> sensorService = new SensorManager(vm); |
| err = sensorService->registerAsService(); |
| ALOGE_IF(err != OK, "Cannot register %s: %d", ISensorManager::descriptor, err); |
| |
| sp<ISchedulingPolicyService> schedulingService = new SchedulingPolicyService(); |
| err = schedulingService->registerAsService(); |
| ALOGE_IF(err != OK, "Cannot register %s: %d", ISchedulingPolicyService::descriptor, err); |
| } |
| |
| static void android_server_SystemServer_initZygoteChildHeapProfiling(JNIEnv* /* env */, |
| jobject /* clazz */) { |
| android_mallopt(M_INIT_ZYGOTE_CHILD_PROFILING, nullptr, 0); |
| } |
| |
| static int get_current_max_fd() { |
| // Not actually guaranteed to be the max, but close enough for our purposes. |
| int fd = open("/dev/null", O_RDONLY | O_CLOEXEC); |
| LOG_ALWAYS_FATAL_IF(fd == -1, "failed to open /dev/null: %s", strerror(errno)); |
| close(fd); |
| return fd; |
| } |
| |
| static const char kFdLeakEnableThresholdProperty[] = "persist.sys.debug.fdtrack_enable_threshold"; |
| static const char kFdLeakAbortThresholdProperty[] = "persist.sys.debug.fdtrack_abort_threshold"; |
| static const char kFdLeakCheckIntervalProperty[] = "persist.sys.debug.fdtrack_interval"; |
| |
| static void android_server_SystemServer_spawnFdLeakCheckThread(JNIEnv*, jobject) { |
| std::thread([]() { |
| pthread_setname_np(pthread_self(), "FdLeakCheckThread"); |
| bool loaded = false; |
| while (true) { |
| const int enable_threshold = GetIntProperty(kFdLeakEnableThresholdProperty, 1024); |
| const int abort_threshold = GetIntProperty(kFdLeakAbortThresholdProperty, 2048); |
| const int check_interval = GetIntProperty(kFdLeakCheckIntervalProperty, 120); |
| int max_fd = get_current_max_fd(); |
| if (max_fd > enable_threshold && !loaded) { |
| loaded = true; |
| ALOGE("fd count above threshold of %d, starting fd backtraces", enable_threshold); |
| if (dlopen("libfdtrack.so", RTLD_GLOBAL) == nullptr) { |
| ALOGE("failed to load libfdtrack.so: %s", dlerror()); |
| } |
| } else if (max_fd > abort_threshold) { |
| raise(BIONIC_SIGNAL_FDTRACK); |
| |
| // Wait for a bit to allow fdtrack to dump backtraces to logcat. |
| std::this_thread::sleep_for(5s); |
| |
| LOG_ALWAYS_FATAL( |
| "b/140703823: aborting due to fd leak: check logs for fd " |
| "backtraces"); |
| } |
| |
| std::this_thread::sleep_for(std::chrono::seconds(check_interval)); |
| } |
| }).detach(); |
| } |
| |
| /* |
| * JNI registration. |
| */ |
| static const JNINativeMethod gMethods[] = { |
| /* name, signature, funcPtr */ |
| { "startSensorService", "()V", (void*) android_server_SystemServer_startSensorService }, |
| { "startHidlServices", "()V", (void*) android_server_SystemServer_startHidlServices }, |
| { "initZygoteChildHeapProfiling", "()V", |
| (void*) android_server_SystemServer_initZygoteChildHeapProfiling }, |
| { "spawnFdLeakCheckThread", "()V", |
| (void*) android_server_SystemServer_spawnFdLeakCheckThread }, |
| |
| }; |
| |
| int register_android_server_SystemServer(JNIEnv* env) |
| { |
| return jniRegisterNativeMethods(env, "com/android/server/SystemServer", |
| gMethods, NELEM(gMethods)); |
| } |
| |
| }; // namespace android |