122 lines
4.3 KiB
Java
122 lines
4.3 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.internal.os;
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import android.app.LoadedApk;
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import android.app.ZygotePreload;
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import android.content.ComponentName;
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import android.content.pm.ApplicationInfo;
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import android.net.LocalSocket;
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import android.util.Log;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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/**
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* Startup class for an Application zygote process.
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*
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* See {@link ZygoteInit} for generic zygote startup documentation.
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*
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* @hide
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*/
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class AppZygoteInit {
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public static final String TAG = "AppZygoteInit";
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private static ZygoteServer sServer;
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private static class AppZygoteServer extends ZygoteServer {
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@Override
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protected ZygoteConnection createNewConnection(LocalSocket socket, String abiList)
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throws IOException {
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return new AppZygoteConnection(socket, abiList);
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}
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}
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private static class AppZygoteConnection extends ZygoteConnection {
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AppZygoteConnection(LocalSocket socket, String abiList) throws IOException {
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super(socket, abiList);
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}
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@Override
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protected void preload() {
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// Nothing to preload by default.
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}
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@Override
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protected boolean isPreloadComplete() {
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// App zygotes don't preload any classes or resources or defaults, all of their
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// preloading is package specific.
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return true;
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}
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@Override
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protected boolean canPreloadApp() {
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return true;
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}
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@Override
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protected void handlePreloadApp(ApplicationInfo appInfo) {
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Log.i(TAG, "Beginning application preload for " + appInfo.packageName);
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LoadedApk loadedApk = new LoadedApk(null, appInfo, null, null, false, true, false);
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ClassLoader loader = loadedApk.getClassLoader();
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Zygote.allowAppFilesAcrossFork(appInfo);
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if (appInfo.zygotePreloadName != null) {
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Class<?> cl;
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Method m;
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try {
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ComponentName preloadName = ComponentName.createRelative(appInfo.packageName,
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appInfo.zygotePreloadName);
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cl = Class.forName(preloadName.getClassName(), true, loader);
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if (!ZygotePreload.class.isAssignableFrom(cl)) {
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Log.e(TAG, preloadName.getClassName() + " does not implement "
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+ ZygotePreload.class.getName());
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} else {
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Constructor<?> ctor = cl.getConstructor();
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ZygotePreload preloadObject = (ZygotePreload) ctor.newInstance();
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Zygote.markOpenedFilesBeforePreload();
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preloadObject.doPreload(appInfo);
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Zygote.allowFilesOpenedByPreload();
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}
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} catch (ReflectiveOperationException e) {
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Log.e(TAG, "AppZygote application preload failed for "
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+ appInfo.zygotePreloadName, e);
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}
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} else {
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Log.i(TAG, "No zygotePreloadName attribute specified.");
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}
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try {
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DataOutputStream socketOut = getSocketOutputStream();
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socketOut.writeInt(loader != null ? 1 : 0);
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} catch (IOException e) {
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throw new IllegalStateException("Error writing to command socket", e);
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}
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Log.i(TAG, "Application preload done");
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}
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}
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public static void main(String[] argv) {
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AppZygoteServer server = new AppZygoteServer();
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ChildZygoteInit.runZygoteServer(server, argv);
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}
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}
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