Introduce ProfcollectForwardingService am: a0bd2a99ee am: fbeb0d8002 am: 4914fdc68c (4e400a6f) · Commits · e / os / android_frameworks_base

services/Android.bp

+2 −0

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@ filegroup {
		":services.midi-sources",
		":services.net-sources",
		":services.print-sources",
		":services.profcollect-sources",
		":services.restrictions-sources",
		":services.startop.iorap-sources",
		":services.systemcaptions-sources",
		@@ -73,6 +74,7 @@ java_library {
		"services.net",
		"services.people",
		"services.print",
		"services.profcollect",
		"services.restrictions",
		"services.startop",
		"services.systemcaptions",

services/java/com/android/server/SystemServer.java

+7 −0

Original line number	Diff line number	Diff line
		@@ -152,6 +152,7 @@ import com.android.server.policy.role.LegacyRoleResolutionPolicy;
		import com.android.server.power.PowerManagerService;
		import com.android.server.power.ShutdownThread;
		import com.android.server.power.ThermalManagerService;
		import com.android.server.profcollect.ProfcollectForwardingService;
		import com.android.server.recoverysystem.RecoverySystemService;
		import com.android.server.restrictions.RestrictionsManagerService;
		import com.android.server.role.RoleManagerService;
		@@ -1219,6 +1220,12 @@ public final class SystemServer {
		mSystemServiceManager.startService(IorapForwardingService.class);
		t.traceEnd();

		if (Build.IS_DEBUGGABLE) {
		t.traceBegin("ProfcollectForwardingService");
		mSystemServiceManager.startService(ProfcollectForwardingService.class);
		t.traceEnd();
		}

		t.traceBegin("SignedConfigService");
		SignedConfigService.registerUpdateReceiver(mSystemContext);
		t.traceEnd();

services/profcollect/Android.bp

0 → 100644

+35 −0

Original line number	Diff line number	Diff line
		// Copyright (C) 2020 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.

		filegroup {
		name: "services.profcollect-javasources",
		srcs: ["src/*/.java"],
		path: "src",
		visibility: ["//frameworks/base/services"],
		}

		filegroup {
		name: "services.profcollect-sources",
		srcs: [
		":services.profcollect-javasources",
		":profcollectd_aidl",
		],
		visibility: ["//frameworks/base/services:__subpackages__"],
		}

		java_library_static {
		name: "services.profcollect",
		srcs: [":services.profcollect-sources"],
		libs: ["services.core"],
		}

services/profcollect/OWNERS

0 → 100644

+3 −0

Original line number	Diff line number	Diff line
		srhines@google.com
		yabinc@google.com
		yikong@google.com

services/profcollect/src/com/android/server/profcollect/ProfcollectForwardingService.java

0 → 100644

+196 −0

Original line number	Diff line number	Diff line
		/**
		* Copyright (C) 2020 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.
		*/

		package com.android.server.profcollect;

		import android.content.Context;
		import android.content.Intent;
		import android.os.Handler;
		import android.os.IBinder.DeathRecipient;
		import android.os.Looper;
		import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.SystemProperties;
		import android.util.Log;

		import com.android.server.IoThread;
		import com.android.server.LocalServices;
		import com.android.server.SystemService;
		import com.android.server.wm.ActivityMetricsLaunchObserver;
		import com.android.server.wm.ActivityMetricsLaunchObserverRegistry;
		import com.android.server.wm.ActivityTaskManagerInternal;

		import java.util.concurrent.ThreadLocalRandom;

		/**
		* System-server-local proxy into the {@code IProfcollectd} native service.
		*/
		public final class ProfcollectForwardingService extends SystemService {
		public static final String LOG_TAG = "ProfcollectForwardingService";

		private IProfCollectd mIProfcollect;
		private ProfcollectForwardingService mSelfService;
		private final Handler mHandler = new ProfcollectdHandler(IoThread.getHandler().getLooper());

		public ProfcollectForwardingService(Context context) {
		super(context);

		if (mSelfService != null) {
		throw new AssertionError("only one service instance allowed");
		}
		mSelfService = this;
		}

		@Override
		public void onStart() {
		Log.i(LOG_TAG, "Profcollect forwarding service start");
		connectNativeService();
		if (mIProfcollect == null) {
		return;
		}
		if (serviceHasSupportedTraceProvider()) {
		registerObservers();
		}
		}

		private boolean serviceHasSupportedTraceProvider() {
		if (mIProfcollect == null) {
		return false;
		}
		try {
		return !mIProfcollect.GetSupportedProvider().isEmpty();
		} catch (RemoteException e) {
		Log.e(LOG_TAG, e.getMessage());
		return false;
		}
		}

		private boolean tryConnectNativeService() {
		if (connectNativeService()) {
		return true;
		}
		// Cannot connect to the native service at this time, retry after a short delay.
		mHandler.sendEmptyMessageDelayed(ProfcollectdHandler.MESSAGE_BINDER_CONNECT, 5000);
		return false;
		}

		private boolean connectNativeService() {
		try {
		IProfCollectd profcollectd =
		IProfCollectd.Stub.asInterface(
		ServiceManager.getServiceOrThrow("profcollectd"));
		profcollectd.asBinder().linkToDeath(new ProfcollectdDeathRecipient(), /flags/0);
		mIProfcollect = profcollectd;
		return true;
		} catch (ServiceManager.ServiceNotFoundException \| RemoteException e) {
		Log.w(LOG_TAG, "Failed to connect profcollectd binder service.");
		return false;
		}
		}

		private class ProfcollectdHandler extends Handler {
		public ProfcollectdHandler(Looper looper) {
		super(looper);
		}

		public static final int MESSAGE_BINDER_CONNECT = 0;

		@Override
		public void handleMessage(android.os.Message message) {
		switch (message.what) {
		case MESSAGE_BINDER_CONNECT:
		connectNativeService();
		break;
		default:
		throw new AssertionError("Unknown message: " + message.toString());
		}
		}
		}

		private class ProfcollectdDeathRecipient implements DeathRecipient {
		@Override
		public void binderDied() {
		Log.w(LOG_TAG, "profcollectd has died");

		mIProfcollect = null;
		tryConnectNativeService();
		}
		}

		// Event observers
		private void registerObservers() {
		registerAppLaunchObserver();
		}

		private final AppLaunchObserver mAppLaunchObserver = new AppLaunchObserver();
		private void registerAppLaunchObserver() {
		ActivityTaskManagerInternal atmInternal =
		LocalServices.getService(ActivityTaskManagerInternal.class);
		ActivityMetricsLaunchObserverRegistry launchObserverRegistry =
		atmInternal.getLaunchObserverRegistry();
		launchObserverRegistry.registerLaunchObserver(mAppLaunchObserver);
		}

		private void traceOnAppStart(String packageName) {
		if (mIProfcollect == null) {
		return;
		}

		// Sample for a fraction of app launches.
		int traceFrequency = SystemProperties.getInt("profcollectd.applaunch_trace_freq", 2);
		int randomNum = ThreadLocalRandom.current().nextInt(100);
		if (randomNum < traceFrequency) {
		try {
		Log.i(LOG_TAG, "Tracing on app launch event: " + packageName);
		mIProfcollect.TraceOnce("applaunch");
		} catch (RemoteException e) {
		Log.e(LOG_TAG, e.getMessage());
		}
		}
		}

		private class AppLaunchObserver implements ActivityMetricsLaunchObserver {
		@Override
		public void onIntentStarted(Intent intent, long timestampNanos) {
		traceOnAppStart(intent.getPackage());
		}

		@Override
		public void onIntentFailed() {
		// Ignored
		}

		@Override
		public void onActivityLaunched(byte[] activity, int temperature) {
		// Ignored
		}

		@Override
		public void onActivityLaunchCancelled(byte[] abortingActivity) {
		// Ignored
		}

		@Override
		public void onActivityLaunchFinished(byte[] finalActivity, long timestampNanos) {
		// Ignored
		}

		@Override
		public void onReportFullyDrawn(byte[] activity, long timestampNanos) {
		// Ignored
		}
		}
		}