ZygoteInit.java revision 46703b099516c383a6882815bcf9cd4df0ec538d
19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage com.android.internal.os; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.pm.ActivityInfo; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.Resources; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.graphics.drawable.Drawable; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.net.LocalServerSocket; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Debug; 2590960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwoodimport android.os.FileUtils; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemClock; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemProperties; 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Config; 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.EventLog; 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.util.Log; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport dalvik.system.VMRuntime; 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport dalvik.system.Zygote; 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3546703b099516c383a6882815bcf9cd4df0ec538dBrian Carlstromimport libcore.io.IoUtils; 3646703b099516c383a6882815bcf9cd4df0ec538dBrian Carlstrom 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.BufferedReader; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.FileDescriptor; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.InputStream; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.InputStreamReader; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.InvocationTargetException; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.Method; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.Modifier; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Startup class for the zygote process. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Pre-initializes some classes, and then waits for commands on a UNIX domain 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * socket. Based on these commands, forks of child processes that inherit 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the initial state of the VM. 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Please see {@link ZygoteConnection.Arguments} for documentation on the 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * client protocol. 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ZygoteInit { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "Zygote"; 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String ANDROID_SOCKET_ENV = "ANDROID_SOCKET_zygote"; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int LOG_BOOT_PROGRESS_PRELOAD_END = 3030; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** when preloading, GC after allocating this many bytes */ 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int PRELOAD_GC_THRESHOLD = 50000; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 710b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes public static final String USAGE_STRING = 720b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes " <\"true\"|\"false\" for startSystemServer>"; 730b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static LocalServerSocket sServerSocket; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Used to pre-load resources. We hold a global reference on it so it 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * never gets destroyed. 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static Resources mResources; 81e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The number of times that the main Zygote loop 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should run before calling gc() again. 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int GC_LOOP_COUNT = 10; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * If true, zygote forks for each peer. If false, a select loop is used 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * inside a single process. The latter is preferred. 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final boolean ZYGOTE_FORK_MODE = false; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The name of a resource file that contains classes to preload. 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String PRELOADED_CLASSES = "preloaded-classes"; 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** Controls whether we should preload resources during zygote init. */ 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final boolean PRELOAD_RESOURCES = true; 101599c918d9794b51992de85b42befa0c71d9ec07fAndy McFadden 102599c918d9794b51992de85b42befa0c71d9ec07fAndy McFadden /** 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes a static "main(argv[]) method on class "className". 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Converts various failing exceptions into RuntimeExceptions, with 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the assumption that they will then cause the VM instance to exit. 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param loader class loader to use 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param className Fully-qualified class name 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param argv Argument vector for main() 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static void invokeStaticMain(ClassLoader loader, 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String className, String[] argv) 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws ZygoteInit.MethodAndArgsCaller { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Class<?> cl; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cl = loader.loadClass(className); 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ClassNotFoundException ex) { 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Missing class when invoking static main " + className, 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ex); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Method m; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m = cl.getMethod("main", new Class[] { String[].class }); 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (NoSuchMethodException ex) { 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Missing static main on " + className, ex); 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (SecurityException ex) { 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Problem getting static main on " + className, ex); 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int modifiers = m.getModifiers(); 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (! (Modifier.isStatic(modifiers) && Modifier.isPublic(modifiers))) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Main method is not public and static on " + className); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This throw gets caught in ZygoteInit.main(), which responds 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by invoking the exception's run() method. This arrangement 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * clears up all the stack frames that were required in setting 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * up the process. 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new ZygoteInit.MethodAndArgsCaller(m, argv); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Registers a server socket for zygote command connections 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws RuntimeException when open fails 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void registerZygoteSocket() { 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sServerSocket == null) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fileDesc; 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String env = System.getenv(ANDROID_SOCKET_ENV); 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fileDesc = Integer.parseInt(env); 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException ex) { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ANDROID_SOCKET_ENV + " unset or invalid", ex); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket = new LocalServerSocket( 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project createFileDescriptor(fileDesc)); 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Error binding to local socket '" + fileDesc + "'", ex); 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Waits for and accepts a single command connection. Throws 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * RuntimeException on failure. 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static ZygoteConnection acceptCommandPeer() { 181e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee try { 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ZygoteConnection(sServerSocket.accept()); 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "IOException during accept()", ex); 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Close and clean up zygote sockets. Called on shutdown and on the 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * child's exit path. 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static void closeServerSocket() { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sServerSocket != null) { 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket.close(); 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Zygote: error closing sockets", ex); 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket = null; 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int UNPRIVILEGED_UID = 9999; 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int UNPRIVILEGED_GID = 9999; 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ROOT_UID = 0; 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ROOT_GID = 0; 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets effective user ID. 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void setEffectiveUser(int uid) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int errno = setreuid(ROOT_UID, uid); 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (errno != 0) { 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "setreuid() failed. errno: " + errno); 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets effective group ID. 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void setEffectiveGroup(int gid) { 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int errno = setregid(ROOT_GID, gid); 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (errno != 0) { 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "setregid() failed. errno: " + errno); 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Performs Zygote process initialization. Loads and initializes 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * commonly used classes. 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Most classes only cause a few hundred bytes to be allocated, but 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * a few will allocate a dozen Kbytes (in one case, 500+K). 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void preloadClasses() { 2399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final VMRuntime runtime = VMRuntime.getRuntime(); 240e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 2419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project InputStream is = ZygoteInit.class.getClassLoader().getResourceAsStream( 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project PRELOADED_CLASSES); 2439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (is == null) { 2449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Couldn't find " + PRELOADED_CLASSES + "."); 2459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 2469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Preloading classes..."); 2479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long startTime = SystemClock.uptimeMillis(); 248e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 2499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Drop root perms while running static initializers. 2509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setEffectiveGroup(UNPRIVILEGED_GID); 2519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setEffectiveUser(UNPRIVILEGED_UID); 2529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Alter the target heap utilization. With explicit GCs this 2549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // is not likely to have any effect. 2559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project float defaultUtilization = runtime.getTargetHeapUtilization(); 2569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.setTargetHeapUtilization(0.8f); 2579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Start with a clean slate. 25908065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 2609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 2619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.startAllocCounting(); 2629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 264e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee BufferedReader br 2659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project = new BufferedReader(new InputStreamReader(is), 256); 2669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int count = 0; 2689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String line; 2699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while ((line = br.readLine()) != null) { 2709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Skip comments and blank lines. 2719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project line = line.trim(); 2729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (line.startsWith("#") || line.equals("")) { 2739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project continue; 2749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 2779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 2789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, "Preloading " + line + "..."); 2799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Class.forName(line); 2819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) { 2829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 2839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, 2849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project " GC at " + Debug.getGlobalAllocSize()); 2859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 28608065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 2879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 2889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.resetGlobalAllocSize(); 2899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project count++; 2919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ClassNotFoundException e) { 292e2417541b4c1c0954295dd77d6c95512f99a9f91Jesse Wilson Log.w(TAG, "Class not found for preloading: " + line); 2932e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee } catch (Throwable t) { 2942e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee Log.e(TAG, "Error preloading " + line + ".", t); 2952e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee if (t instanceof Error) { 2962e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee throw (Error) t; 2972e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee } 2982e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee if (t instanceof RuntimeException) { 2992e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee throw (RuntimeException) t; 3002e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee } 3012e93f65cab0b4b21a1285b83e985559325e87a3aBob Lee throw new RuntimeException(t); 3029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "...preloaded " + count + " classes in " 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + (SystemClock.uptimeMillis()-startTime) + "ms."); 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException e) { 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Error reading " + PRELOADED_CLASSES + ".", e); 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 31046703b099516c383a6882815bcf9cd4df0ec538dBrian Carlstrom IoUtils.closeQuietly(is); 3119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Restore default. 3129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.setTargetHeapUtilization(defaultUtilization); 3139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.stopAllocCounting(); 3159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Bring back root. We'll need it later. 3179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setEffectiveUser(ROOT_UID); 3189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project setEffectiveGroup(ROOT_GID); 3199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 3249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Load in commonly used resources, so they can be shared across 3259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * processes. 3269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 3279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * These tend to be a few Kbytes, but are frequently in the 20-40K 3289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * range, and occasionally even larger. 3299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 3309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void preloadResources() { 3319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final VMRuntime runtime = VMRuntime.getRuntime(); 332e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 3339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.startAllocCounting(); 3349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 33508065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 3369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 3379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResources = Resources.getSystem(); 3389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResources.startPreloading(); 3399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (PRELOAD_RESOURCES) { 3409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Preloading resources..."); 3419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long startTime = SystemClock.uptimeMillis(); 3439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TypedArray ar = mResources.obtainTypedArray( 3449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.array.preloaded_drawables); 3459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int N = preloadDrawables(runtime, ar); 3469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "...preloaded " + N + " resources in " 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + (SystemClock.uptimeMillis()-startTime) + "ms."); 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startTime = SystemClock.uptimeMillis(); 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ar = mResources.obtainTypedArray( 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.array.preloaded_color_state_lists); 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project N = preloadColorStateLists(runtime, ar); 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "...preloaded " + N + " resources in " 3549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + (SystemClock.uptimeMillis()-startTime) + "ms."); 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResources.finishPreloading(); 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException e) { 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Failure preloading resources", e); 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.stopAllocCounting(); 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int preloadColorStateLists(VMRuntime runtime, TypedArray ar) { 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int N = ar.length(); 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i=0; i<N; i++) { 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) { 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, " GC at " + Debug.getGlobalAllocSize()); 3709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 37108065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 3739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.resetGlobalAllocSize(); 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int id = ar.getResourceId(i, 0); 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); 3789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (id != 0) { 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResources.getColorStateList(id); 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return N; 3849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int preloadDrawables(VMRuntime runtime, TypedArray ar) { 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int N = ar.length(); 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i=0; i<N; i++) { 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) { 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, " GC at " + Debug.getGlobalAllocSize()); 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 39408065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.resetGlobalAllocSize(); 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int id = ar.getResourceId(i, 0); 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Config.LOGV) { 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); 4019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (id != 0) { 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Drawable dr = mResources.getDrawable(id); 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ((dr.getChangingConfigurations()&~ActivityInfo.CONFIG_FONT_SCALE) != 0) { 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Preloaded drawable resource #0x" 4069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + Integer.toHexString(id) 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + " (" + ar.getString(i) + ") that varies with configuration!!"); 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return N; 4129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Runs several special GCs to try to clean up a few generations of 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * softly- and final-reachable objects, along with any other garbage. 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is only useful just before a fork(). 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /*package*/ static void gc() { 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final VMRuntime runtime = VMRuntime.getRuntime(); 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* runFinalizationSync() lets finalizers be called in Zygote, 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which doesn't have a HeapWorker thread. 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 42508065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 42708065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 42908065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finish remaining work for the newly forked system server process. 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void handleSystemServerProcess( 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection.Arguments parsedArgs) 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws ZygoteInit.MethodAndArgsCaller { 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 44290960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwood // set umask to 0077 so new files and directories will default to owner-only permissions. 44390960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwood FileUtils.setUMask(FileUtils.S_IRWXG | FileUtils.S_IRWXO); 44490960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwood 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Pass the remaining arguments to SystemServer. 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * "--nice-name=system_server com.android.server.SystemServer" 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project RuntimeInit.zygoteInit(parsedArgs.remainingArgs); 4509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* should never reach here */ 4519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Prepare the arguments and fork for the system server process. 4559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 456e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee private static boolean startSystemServer() 4579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws MethodAndArgsCaller, RuntimeException { 4589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Hardcoded command line to start the system server */ 4599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String args[] = { 4609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--setuid=1000", 4619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--setgid=1000", 462037a086b164c376d8c428a2a584a3460bf82590fMike Lockwood "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1018,3001,3002,3003", 4631caefa6c40a732dbe75b0782f0aa3147017c38d0San Mehat "--capabilities=130104352,130104352", 4649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--runtime-init", 4659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--nice-name=system_server", 4669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "com.android.server.SystemServer", 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection.Arguments parsedArgs = null; 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int pid; 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 4739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project parsedArgs = new ZygoteConnection.Arguments(args); 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Enable debugging of the system process if *either* the command line flags 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * indicate it should be debuggable or the ro.debuggable system property 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * is set to "1" 4799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int debugFlags = parsedArgs.debugFlags; 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if ("1".equals(SystemProperties.get("ro.debuggable"))) 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project debugFlags |= Zygote.DEBUG_ENABLE_DEBUGGER; 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Request to fork the system server process */ 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pid = Zygote.forkSystemServer( 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project parsedArgs.uid, parsedArgs.gid, 4871b4c7966b15382e9ffb2bfe6468dcef0b6d090b6Andy McFadden parsedArgs.gids, debugFlags, null, 4881b4c7966b15382e9ffb2bfe6468dcef0b6d090b6Andy McFadden parsedArgs.permittedCapabilities, 4891b4c7966b15382e9ffb2bfe6468dcef0b6d090b6Andy McFadden parsedArgs.effectiveCapabilities); 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IllegalArgumentException ex) { 4919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 492e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee } 493e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* For child process */ 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (pid == 0) { 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleSystemServerProcess(parsedArgs); 4979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 5009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static void main(String argv[]) { 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 504e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee // Start profiling the zygote initialization. 505e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee SamplingProfilerIntegration.start(); 506e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project registerZygoteSocket(); 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START, 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SystemClock.uptimeMillis()); 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project preloadClasses(); 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project preloadResources(); 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_END, 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SystemClock.uptimeMillis()); 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5151751086360056bc60d00f2ed2988bc82be9e7bd9Brian Carlstrom // Finish profiling the zygote initialization. 5161751086360056bc60d00f2ed2988bc82be9e7bd9Brian Carlstrom SamplingProfilerIntegration.writeZygoteSnapshot(); 517e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 5189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Do an initial gc to clean up after startup 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project gc(); 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If requested, start system server directly from Zygote 5229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (argv.length != 2) { 5230b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes throw new RuntimeException(argv[0] + USAGE_STRING); 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (argv[1].equals("true")) { 5279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startSystemServer(); 5280b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes } else if (!argv[1].equals("false")) { 5290b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes throw new RuntimeException(argv[0] + USAGE_STRING); 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Accepting command socket connections"); 5339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ZYGOTE_FORK_MODE) { 5359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runForkMode(); 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runSelectLoopMode(); 5389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 5419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (MethodAndArgsCaller caller) { 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project caller.run(); 5439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException ex) { 5449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Zygote died with exception", ex); 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw ex; 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Runs the zygote in accept-and-fork mode. In this mode, each peer 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * gets its own zygote spawner process. This code is retained for 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * reference only. 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws MethodAndArgsCaller in a child process when a main() should 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be executed. 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void runForkMode() throws MethodAndArgsCaller { 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (true) { 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection peer = acceptCommandPeer(); 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int pid; 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pid = Zygote.fork(); 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (pid == 0) { 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The child process should handle the peer requests 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // The child does not accept any more connections 5709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 5719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket.close(); 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Zygote Child: error closing sockets", ex); 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket = null; 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peer.run(); 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (pid > 0) { 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peer.closeSocket(); 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error invoking fork()"); 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Runs the zygote process's select loop. Accepts new connections as 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * they happen, and reads commands from connections one spawn-request's 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * worth at a time. 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws MethodAndArgsCaller in a child process when a main() should 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be executed. 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void runSelectLoopMode() throws MethodAndArgsCaller { 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ArrayList<FileDescriptor> fds = new ArrayList(); 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ArrayList<ZygoteConnection> peers = new ArrayList(); 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FileDescriptor[] fdArray = new FileDescriptor[4]; 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.add(sServerSocket.getFileDescriptor()); 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.add(null); 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int loopCount = GC_LOOP_COUNT; 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (true) { 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index; 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Call gc() before we block in select(). 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * It's work that has to be done anyway, and it's better 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to avoid making every child do it. It will also 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * madvise() any free memory as a side-effect. 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Don't call it every time, because walking the entire 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * heap is a lot of overhead to free a few hundred bytes. 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (loopCount <= 0) { 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project gc(); 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project loopCount = GC_LOOP_COUNT; 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project loopCount--; 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fdArray = fds.toArray(fdArray); 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = selectReadable(fdArray); 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error in select()", ex); 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index < 0) { 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error in select()"); 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (index == 0) { 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection newPeer = acceptCommandPeer(); 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.add(newPeer); 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.add(newPeer.getFileDesciptor()); 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean done; 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project done = peers.get(index).runOnce(); 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (done) { 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.remove(index); 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.remove(index); 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The Linux syscall "setreuid()" 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param ruid real uid 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param euid effective uid 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success, non-zero errno on fail 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setreuid(int ruid, int euid); 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The Linux syscall "setregid()" 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rgid real gid 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param egid effective gid 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success, non-zero errno on fail 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setregid(int rgid, int egid); 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the linux syscall "setpgid" 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid pid to change 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pgid new process group of pid 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success or non-zero errno on fail 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setpgid(int pid, int pgid); 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the linux syscall "getpgid" 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid pid to query 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return pgid of pid in question 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException on error 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int getpgid(int pid) throws IOException; 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the syscall dup2() to copy the specified descriptors into 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * stdin, stdout, and stderr. The existing stdio descriptors will be 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * closed and errors during close will be ignored. The specified 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * descriptors will also remain open at their original descriptor numbers, 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * so the caller may want to close the original descriptors. 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param in new stdin 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param out new stdout 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param err new stderr 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void reopenStdio(FileDescriptor in, 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FileDescriptor out, FileDescriptor err) throws IOException; 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Calls close() on a file descriptor 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fd descriptor to close 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void closeDescriptor(FileDescriptor fd) 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Toggles the close-on-exec flag for the specified file descriptor. 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fd non-null; file descriptor 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flag desired close-on-exec flag state 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void setCloseOnExec(FileDescriptor fd, boolean flag) 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Retrieves the permitted capability set from another process. 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid >=0 process ID or 0 for this process 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException on error 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native long capgetPermitted(int pid) 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets the permitted and effective capability sets of this process. 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param permittedCapabilities permitted set 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param effectiveCapabilities effective set 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException on error 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void setCapabilities( 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long permittedCapabilities, 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long effectiveCapabilities) throws IOException; 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes select() on the provider array of file descriptors (selecting 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * for readability only). Array elements of null are ignored. 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fds non-null; array of readable file descriptors 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return index of descriptor that is now readable or -1 for empty array. 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException if an error occurs 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int selectReadable(FileDescriptor[] fds) throws IOException; 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a file descriptor from an int fd. 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fd integer OS file descriptor 7529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return non-null; FileDescriptor instance 7539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException if fd is invalid 7549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native FileDescriptor createFileDescriptor(int fd) 7569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 7579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Class not instantiable. 7609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ZygoteInit() { 7629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper exception class which holds a method and arguments and 7669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * can call them. This is used as part of a trampoline to get rid of 7679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the initial process setup stack frames. 7689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static class MethodAndArgsCaller extends Exception 7709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements Runnable { 7719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** method to call */ 7729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Method mMethod; 7739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** argument array */ 7759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final String[] mArgs; 7769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MethodAndArgsCaller(Method method, String[] args) { 7789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMethod = method; 7799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArgs = args; 7809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 7839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 7849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMethod.invoke(null, new Object[] { mArgs }); 7859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IllegalAccessException ex) { 7869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 7879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (InvocationTargetException ex) { 7889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Throwable cause = ex.getCause(); 7899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (cause instanceof RuntimeException) { 7909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw (RuntimeException) cause; 7919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (cause instanceof Error) { 7929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw (Error) cause; 7939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 7959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 799