ZygoteInit.java revision 6ad0452e6301c0650f58f3991f7c523f6f279ddb
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 194c74f8c1713fa82904b10beec4da9ad8ebb97375Kenny Rootimport static libcore.io.OsConstants.S_IRWXG; 204c74f8c1713fa82904b10beec4da9ad8ebb97375Kenny Rootimport static libcore.io.OsConstants.S_IRWXO; 214c74f8c1713fa82904b10beec4da9ad8ebb97375Kenny Root 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.Resources; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.content.res.TypedArray; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.net.LocalServerSocket; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.Debug; 26ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brownimport android.os.Process; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.os.SystemClock; 286ad0452e6301c0650f58f3991f7c523f6f279ddbJamie Gennisimport android.os.Trace; 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; 364c74f8c1713fa82904b10beec4da9ad8ebb97375Kenny Rootimport libcore.io.Libcore; 3746703b099516c383a6882815bcf9cd4df0ec538dBrian Carlstrom 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.BufferedReader; 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.FileDescriptor; 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.IOException; 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.InputStream; 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.io.InputStreamReader; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.InvocationTargetException; 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.Method; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.lang.reflect.Modifier; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Startup class for the zygote process. 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Pre-initializes some classes, and then waits for commands on a UNIX domain 52e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes * socket. Based on these commands, forks off child processes that inherit 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the initial state of the VM. 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Please see {@link ZygoteConnection.Arguments} for documentation on the 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * client protocol. 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @hide 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class ZygoteInit { 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String TAG = "Zygote"; 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String ANDROID_SOCKET_ENV = "ANDROID_SOCKET_zygote"; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int LOG_BOOT_PROGRESS_PRELOAD_END = 3030; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** when preloading, GC after allocating this many bytes */ 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int PRELOAD_GC_THRESHOLD = 50000; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 720b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes public static final String USAGE_STRING = 73ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown " <\"start-system-server\"|\"\" for startSystemServer>"; 740b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static LocalServerSocket sServerSocket; 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Used to pre-load resources. We hold a global reference on it so it 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * never gets destroyed. 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static Resources mResources; 82e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The number of times that the main Zygote loop 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * should run before calling gc() again. 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static final int GC_LOOP_COUNT = 10; 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The name of a resource file that contains classes to preload. 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final String PRELOADED_CLASSES = "preloaded-classes"; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** Controls whether we should preload resources during zygote init. */ 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final boolean PRELOAD_RESOURCES = true; 96599c918d9794b51992de85b42befa0c71d9ec07fAndy McFadden 97599c918d9794b51992de85b42befa0c71d9ec07fAndy McFadden /** 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes a static "main(argv[]) method on class "className". 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Converts various failing exceptions into RuntimeExceptions, with 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the assumption that they will then cause the VM instance to exit. 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param loader class loader to use 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param className Fully-qualified class name 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param argv Argument vector for main() 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static void invokeStaticMain(ClassLoader loader, 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String className, String[] argv) 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws ZygoteInit.MethodAndArgsCaller { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Class<?> cl; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project cl = loader.loadClass(className); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (ClassNotFoundException ex) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Missing class when invoking static main " + className, 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ex); 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Method m; 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project m = cl.getMethod("main", new Class[] { String[].class }); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (NoSuchMethodException ex) { 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Missing static main on " + className, ex); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (SecurityException ex) { 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Problem getting static main on " + className, ex); 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int modifiers = m.getModifiers(); 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (! (Modifier.isStatic(modifiers) && Modifier.isPublic(modifiers))) { 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Main method is not public and static on " + className); 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This throw gets caught in ZygoteInit.main(), which responds 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * by invoking the exception's run() method. This arrangement 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * clears up all the stack frames that were required in setting 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * up the process. 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new ZygoteInit.MethodAndArgsCaller(m, argv); 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Registers a server socket for zygote command connections 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws RuntimeException when open fails 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void registerZygoteSocket() { 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sServerSocket == null) { 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int fileDesc; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String env = System.getenv(ANDROID_SOCKET_ENV); 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fileDesc = Integer.parseInt(env); 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException ex) { 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ANDROID_SOCKET_ENV + " unset or invalid", ex); 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket = new LocalServerSocket( 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project createFileDescriptor(fileDesc)); 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "Error binding to local socket '" + fileDesc + "'", ex); 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Waits for and accepts a single command connection. Throws 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * RuntimeException on failure. 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static ZygoteConnection acceptCommandPeer() { 176e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee try { 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ZygoteConnection(sServerSocket.accept()); 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException( 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "IOException during accept()", ex); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Close and clean up zygote sockets. Called on shutdown and on the 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * child's exit path. 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static void closeServerSocket() { 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sServerSocket != null) { 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket.close(); 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Zygote: error closing sockets", ex); 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sServerSocket = null; 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int UNPRIVILEGED_UID = 9999; 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int UNPRIVILEGED_GID = 9999; 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ROOT_UID = 0; 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int ROOT_GID = 0; 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets effective user ID. 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void setEffectiveUser(int uid) { 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int errno = setreuid(ROOT_UID, uid); 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (errno != 0) { 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "setreuid() failed. errno: " + errno); 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Sets effective group ID. 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void setEffectiveGroup(int gid) { 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int errno = setregid(ROOT_GID, gid); 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (errno != 0) { 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "setregid() failed. errno: " + errno); 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2260c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown static void preload() { 2270c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown preloadClasses(); 2280c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown preloadResources(); 2290c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown } 2300c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown 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 241dc7bf5d8bff86bed7947806c81a28aff5e9a8c3eAndy McFadden InputStream is = ClassLoader.getSystemClassLoader().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 { 27743a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 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) { 28243a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 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); 34614577c4df57004131174fbe435031a18f3e7996bJeff Brown ar.recycle(); 3479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "...preloaded " + N + " resources in " 3489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + (SystemClock.uptimeMillis()-startTime) + "ms."); 3499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startTime = SystemClock.uptimeMillis(); 3519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ar = mResources.obtainTypedArray( 3529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project com.android.internal.R.array.preloaded_color_state_lists); 3539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project N = preloadColorStateLists(runtime, ar); 35414577c4df57004131174fbe435031a18f3e7996bJeff Brown ar.recycle(); 3559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "...preloaded " + N + " resources in " 3569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + (SystemClock.uptimeMillis()-startTime) + "ms."); 3579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mResources.finishPreloading(); 3599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException e) { 3609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.w(TAG, "Failure preloading resources", e); 3619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } finally { 3629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.stopAllocCounting(); 3639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int preloadColorStateLists(VMRuntime runtime, TypedArray ar) { 3679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int N = ar.length(); 3689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i=0; i<N; i++) { 3699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) { 37043a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 3719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, " GC at " + Debug.getGlobalAllocSize()); 3729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 37308065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 3749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 3759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.resetGlobalAllocSize(); 3769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int id = ar.getResourceId(i, 0); 37843a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 3799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); 3809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (id != 0) { 382dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn if (mResources.getColorStateList(id) == null) { 383dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn throw new IllegalArgumentException( 384dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn "Unable to find preloaded color resource #0x" 385dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn + Integer.toHexString(id) 386dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn + " (" + ar.getString(i) + ")"); 387dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn } 3889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return N; 3919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 3929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 3949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static int preloadDrawables(VMRuntime runtime, TypedArray ar) { 3959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int N = ar.length(); 3969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i=0; i<N; i++) { 3979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (Debug.getGlobalAllocSize() > PRELOAD_GC_THRESHOLD) { 39843a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 3999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, " GC at " + Debug.getGlobalAllocSize()); 4009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 40108065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 4039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Debug.resetGlobalAllocSize(); 4049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int id = ar.getResourceId(i, 0); 40643a17654cf4bfe7f1ec22bd8b7b32daccdf27c09Joe Onorato if (false) { 4079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); 4089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (id != 0) { 410dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn if (mResources.getDrawable(id) == null) { 411dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn throw new IllegalArgumentException( 412dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn "Unable to find preloaded drawable resource #0x" 4139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project + Integer.toHexString(id) 414dde331cebd87982faded6818ad5f9927ff994c96Dianne Hackborn + " (" + ar.getString(i) + ")"); 4159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return N; 4199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Runs several special GCs to try to clean up a few generations of 4239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * softly- and final-reachable objects, along with any other garbage. 4249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This is only useful just before a fork(). 4259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /*package*/ static void gc() { 4279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project final VMRuntime runtime = VMRuntime.getRuntime(); 4289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* runFinalizationSync() lets finalizers be called in Zygote, 4309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * which doesn't have a HeapWorker thread. 4319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 43208065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 43408065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 43608065b9f09ead8895d97b2971622af8c179e1768Brian Carlstrom System.gc(); 4379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project runtime.runFinalizationSync(); 4389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Finish remaining work for the newly forked system server process. 4429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static void handleSystemServerProcess( 4449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection.Arguments parsedArgs) 4459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws ZygoteInit.MethodAndArgsCaller { 4469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 4489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 44990960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwood // set umask to 0077 so new files and directories will default to owner-only permissions. 4504c74f8c1713fa82904b10beec4da9ad8ebb97375Kenny Root Libcore.os.umask(S_IRWXG | S_IRWXO); 45190960e87ecae696f73ae18e46c2f003fc3f592ccMike Lockwood 452ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown if (parsedArgs.niceName != null) { 453ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown Process.setArgV0(parsedArgs.niceName); 454ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown } 455ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown 456ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown if (parsedArgs.invokeWith != null) { 457ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown WrapperInit.execApplication(parsedArgs.invokeWith, 458e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes parsedArgs.niceName, parsedArgs.targetSdkVersion, 459e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes null, parsedArgs.remainingArgs); 460ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown } else { 461ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown /* 462ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown * Pass the remaining arguments to SystemServer. 463ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown */ 464e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes RuntimeInit.zygoteInit(parsedArgs.targetSdkVersion, parsedArgs.remainingArgs); 465ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown } 466ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown 4679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* should never reach here */ 4689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 4699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 4719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Prepare the arguments and fork for the system server process. 4729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 473e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee private static boolean startSystemServer() 4749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws MethodAndArgsCaller, RuntimeException { 4759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Hardcoded command line to start the system server */ 4769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project String args[] = { 4779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--setuid=1000", 4789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--setgid=1000", 479b5d55e302d2253e4bfb233ea705caf258cdc4cb9Jeff Sharkey "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1018,3001,3002,3003,3006,3007", 4801caefa6c40a732dbe75b0782f0aa3147017c38d0San Mehat "--capabilities=130104352,130104352", 4819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--runtime-init", 4829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "--nice-name=system_server", 4839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project "com.android.server.SystemServer", 4849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project }; 4859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection.Arguments parsedArgs = null; 4869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int pid; 4889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 4909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project parsedArgs = new ZygoteConnection.Arguments(args); 491ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown ZygoteConnection.applyDebuggerSystemProperty(parsedArgs); 492ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown ZygoteConnection.applyInvokeWithSystemProperty(parsedArgs); 4939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 4949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* Request to fork the system server process */ 4959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project pid = Zygote.forkSystemServer( 4969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project parsedArgs.uid, parsedArgs.gid, 497e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes parsedArgs.gids, 498e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes parsedArgs.debugFlags, 499e1dfcb7ab01fb991079ec1f70f75281a0ca9073eElliott Hughes null, 5001b4c7966b15382e9ffb2bfe6468dcef0b6d090b6Andy McFadden parsedArgs.permittedCapabilities, 5011b4c7966b15382e9ffb2bfe6468dcef0b6d090b6Andy McFadden parsedArgs.effectiveCapabilities); 5029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IllegalArgumentException ex) { 5039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 504e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee } 505e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 5069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* For child process */ 5079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (pid == 0) { 5089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project handleSystemServerProcess(parsedArgs); 5099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 5129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static void main(String argv[]) { 5159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 516e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee // Start profiling the zygote initialization. 517e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee SamplingProfilerIntegration.start(); 518e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 5199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project registerZygoteSocket(); 5209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START, 5219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SystemClock.uptimeMillis()); 5220c2313dc4f4bfaf6aa0506df4c54f25591a9e4c7Jeff Brown preload(); 5239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_END, 5249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SystemClock.uptimeMillis()); 5259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5261751086360056bc60d00f2ed2988bc82be9e7bd9Brian Carlstrom // Finish profiling the zygote initialization. 5271751086360056bc60d00f2ed2988bc82be9e7bd9Brian Carlstrom SamplingProfilerIntegration.writeZygoteSnapshot(); 528e540833fdff4d58e37c9ba859388e24e2945ed45Bob Lee 5299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Do an initial gc to clean up after startup 5309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project gc(); 5319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5326ad0452e6301c0650f58f3991f7c523f6f279ddbJamie Gennis // Disable tracing so that forked processes do not inherit stale tracing tags from 5336ad0452e6301c0650f58f3991f7c523f6f279ddbJamie Gennis // Zygote. 5346ad0452e6301c0650f58f3991f7c523f6f279ddbJamie Gennis Trace.setTracingEnabled(false); 5356ad0452e6301c0650f58f3991f7c523f6f279ddbJamie Gennis 5369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // If requested, start system server directly from Zygote 5379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (argv.length != 2) { 5380b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes throw new RuntimeException(argv[0] + USAGE_STRING); 5399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 541ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown if (argv[1].equals("start-system-server")) { 5429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project startSystemServer(); 543ebed7d6e35f7f960e6e6add2b8ab7c7a31a511c3Jeff Brown } else if (!argv[1].equals("")) { 5440b3533ae838811d15afb1017144dfbf7c41df4a8Barry Hayes throw new RuntimeException(argv[0] + USAGE_STRING); 5459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.i(TAG, "Accepting command socket connections"); 5489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549cae3d9f0ab2756e3659efc7a08830d2d7b43a05eNick Kralevich runSelectLoop(); 5509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 5529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (MethodAndArgsCaller caller) { 5539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project caller.run(); 5549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (RuntimeException ex) { 5559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Log.e(TAG, "Zygote died with exception", ex); 5569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project closeServerSocket(); 5579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw ex; 5589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 5629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Runs the zygote process's select loop. Accepts new connections as 5639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * they happen, and reads commands from connections one spawn-request's 5649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * worth at a time. 5659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws MethodAndArgsCaller in a child process when a main() should 5679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * be executed. 5689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 569cae3d9f0ab2756e3659efc7a08830d2d7b43a05eNick Kralevich private static void runSelectLoop() throws MethodAndArgsCaller { 570cae3d9f0ab2756e3659efc7a08830d2d7b43a05eNick Kralevich ArrayList<FileDescriptor> fds = new ArrayList<FileDescriptor>(); 571cae3d9f0ab2756e3659efc7a08830d2d7b43a05eNick Kralevich ArrayList<ZygoteConnection> peers = new ArrayList<ZygoteConnection>(); 5729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FileDescriptor[] fdArray = new FileDescriptor[4]; 5739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.add(sServerSocket.getFileDescriptor()); 5759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.add(null); 5769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int loopCount = GC_LOOP_COUNT; 5789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project while (true) { 5799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int index; 5809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 5829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Call gc() before we block in select(). 5839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * It's work that has to be done anyway, and it's better 5849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * to avoid making every child do it. It will also 5859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * madvise() any free memory as a side-effect. 5869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 5879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Don't call it every time, because walking the entire 5889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * heap is a lot of overhead to free a few hundred bytes. 5899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 5909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (loopCount <= 0) { 5919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project gc(); 5929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project loopCount = GC_LOOP_COUNT; 5939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 5949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project loopCount--; 5959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 5969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 5989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 5999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fdArray = fds.toArray(fdArray); 6009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project index = selectReadable(fdArray); 6019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IOException ex) { 6029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error in select()", ex); 6039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (index < 0) { 6069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException("Error in select()"); 6079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (index == 0) { 6089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ZygoteConnection newPeer = acceptCommandPeer(); 6099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.add(newPeer); 6109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.add(newPeer.getFileDesciptor()); 6119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 6129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean done; 6139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project done = peers.get(index).runOnce(); 6149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (done) { 6169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project peers.remove(index); 6179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project fds.remove(index); 6189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 6229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The Linux syscall "setreuid()" 6259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param ruid real uid 6269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param euid effective uid 6279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success, non-zero errno on fail 6289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setreuid(int ruid, int euid); 6309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The Linux syscall "setregid()" 6339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param rgid real gid 6349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param egid effective gid 6359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success, non-zero errno on fail 6369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setregid(int rgid, int egid); 6389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the linux syscall "setpgid" 6419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid pid to change 6439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pgid new process group of pid 6449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return 0 on success or non-zero errno on fail 6459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int setpgid(int pid, int pgid); 6479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the linux syscall "getpgid" 6509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid pid to query 6529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return pgid of pid in question 6539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException on error 6549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int getpgid(int pid) throws IOException; 6569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes the syscall dup2() to copy the specified descriptors into 6599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * stdin, stdout, and stderr. The existing stdio descriptors will be 6609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * closed and errors during close will be ignored. The specified 6619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * descriptors will also remain open at their original descriptor numbers, 6629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * so the caller may want to close the original descriptors. 6639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param in new stdin 6659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param out new stdout 6669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param err new stderr 6679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException 6689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void reopenStdio(FileDescriptor in, 6709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project FileDescriptor out, FileDescriptor err) throws IOException; 6719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Toggles the close-on-exec flag for the specified file descriptor. 6749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fd non-null; file descriptor 6769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param flag desired close-on-exec flag state 6779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException 6789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native void setCloseOnExec(FileDescriptor fd, boolean flag) 6809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 6819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Retrieves the permitted capability set from another process. 6849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param pid >=0 process ID or 0 for this process 6869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException on error 6879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native long capgetPermitted(int pid) 6899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 6909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 6919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 6929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Invokes select() on the provider array of file descriptors (selecting 6939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * for readability only). Array elements of null are ignored. 6949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 6959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fds non-null; array of readable file descriptors 6969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return index of descriptor that is now readable or -1 for empty array. 6979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException if an error occurs 6989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 6999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native int selectReadable(FileDescriptor[] fds) throws IOException; 7009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a file descriptor from an int fd. 7039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 7049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @param fd integer OS file descriptor 7059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @return non-null; FileDescriptor instance 7069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * @throws IOException if fd is invalid 7079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static native FileDescriptor createFileDescriptor(int fd) 7099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throws IOException; 7109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Class not instantiable. 7139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ZygoteInit() { 7159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 7189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Helper exception class which holds a method and arguments and 7199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * can call them. This is used as part of a trampoline to get rid of 7209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the initial process setup stack frames. 7219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 7229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static class MethodAndArgsCaller extends Exception 7239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements Runnable { 7249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** method to call */ 7259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final Method mMethod; 7269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** argument array */ 7289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private final String[] mArgs; 7299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public MethodAndArgsCaller(Method method, String[] args) { 7319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMethod = method; 7329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mArgs = args; 7339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void run() { 7369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project try { 7379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mMethod.invoke(null, new Object[] { mArgs }); 7389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (IllegalAccessException ex) { 7399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 7409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } catch (InvocationTargetException ex) { 7419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Throwable cause = ex.getCause(); 7429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (cause instanceof RuntimeException) { 7439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw (RuntimeException) cause; 7449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (cause instanceof Error) { 7459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw (Error) cause; 7469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project throw new RuntimeException(ex); 7489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 7519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 752