| /* |
| * Copyright (C) 2018 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.internal.os; |
| |
| import android.app.LoadedApk; |
| import android.app.ZygotePreload; |
| import android.content.ComponentName; |
| import android.content.pm.ApplicationInfo; |
| import android.net.LocalSocket; |
| import android.util.Log; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Startup class for an Application zygote process. |
| * |
| * See {@link ZygoteInit} for generic zygote startup documentation. |
| * |
| * @hide |
| */ |
| class AppZygoteInit { |
| public static final String TAG = "AppZygoteInit"; |
| |
| private static ZygoteServer sServer; |
| |
| private static class AppZygoteServer extends ZygoteServer { |
| @Override |
| protected ZygoteConnection createNewConnection(LocalSocket socket, String abiList) |
| throws IOException { |
| return new AppZygoteConnection(socket, abiList); |
| } |
| } |
| |
| private static class AppZygoteConnection extends ZygoteConnection { |
| AppZygoteConnection(LocalSocket socket, String abiList) throws IOException { |
| super(socket, abiList); |
| } |
| |
| @Override |
| protected void preload() { |
| // Nothing to preload by default. |
| } |
| |
| @Override |
| protected boolean isPreloadComplete() { |
| // App zygotes don't preload any classes or resources or defaults, all of their |
| // preloading is package specific. |
| return true; |
| } |
| |
| @Override |
| protected boolean canPreloadApp() { |
| return true; |
| } |
| |
| @Override |
| protected void handlePreloadApp(ApplicationInfo appInfo) { |
| Log.i(TAG, "Beginning application preload for " + appInfo.packageName); |
| LoadedApk loadedApk = new LoadedApk(null, appInfo, null, null, false, true, false); |
| ClassLoader loader = loadedApk.getClassLoader(); |
| |
| Zygote.allowAppFilesAcrossFork(appInfo); |
| |
| if (appInfo.zygotePreloadName != null) { |
| Class<?> cl; |
| Method m; |
| try { |
| ComponentName preloadName = ComponentName.createRelative(appInfo.packageName, |
| appInfo.zygotePreloadName); |
| cl = Class.forName(preloadName.getClassName(), true, loader); |
| if (!ZygotePreload.class.isAssignableFrom(cl)) { |
| Log.e(TAG, preloadName.getClassName() + " does not implement " |
| + ZygotePreload.class.getName()); |
| } else { |
| Constructor<?> ctor = cl.getConstructor(); |
| ZygotePreload preloadObject = (ZygotePreload) ctor.newInstance(); |
| preloadObject.doPreload(appInfo); |
| } |
| } catch (ReflectiveOperationException e) { |
| Log.e(TAG, "AppZygote application preload failed for " |
| + appInfo.zygotePreloadName, e); |
| } |
| } else { |
| Log.i(TAG, "No zygotePreloadName attribute specified."); |
| } |
| |
| try { |
| DataOutputStream socketOut = getSocketOutputStream(); |
| socketOut.writeInt(loader != null ? 1 : 0); |
| } catch (IOException e) { |
| throw new IllegalStateException("Error writing to command socket", e); |
| } |
| |
| Log.i(TAG, "Application preload done"); |
| } |
| } |
| |
| public static void main(String[] argv) { |
| AppZygoteServer server = new AppZygoteServer(); |
| ChildZygoteInit.runZygoteServer(server, argv); |
| } |
| } |