The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.internal.os; |
| 18 | |
Elliott Hughes | 894724b | 2014-12-15 12:39:51 -0800 | [diff] [blame] | 19 | import static android.system.OsConstants.POLLIN; |
Elliott Hughes | a9569ff | 2014-04-28 20:53:52 -0700 | [diff] [blame] | 20 | import static android.system.OsConstants.S_IRWXG; |
| 21 | import static android.system.OsConstants.S_IRWXO; |
Kenny Root | 4c74f8c | 2012-08-17 08:45:55 -0700 | [diff] [blame] | 22 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | import android.content.res.Resources; |
| 24 | import android.content.res.TypedArray; |
Neil Fuller | 41c9dc3 | 2016-05-09 16:55:36 +0100 | [diff] [blame] | 25 | import android.icu.impl.CacheValue; |
| 26 | import android.icu.text.DecimalFormatSymbols; |
| 27 | import android.icu.util.ULocale; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import android.net.LocalServerSocket; |
Romain Guy | 74c6912 | 2013-05-08 17:54:20 -0700 | [diff] [blame] | 29 | import android.opengl.EGL14; |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 30 | import android.os.Process; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | import android.os.SystemClock; |
Romain Guy | c5e3638 | 2013-05-09 11:08:17 -0700 | [diff] [blame] | 32 | import android.os.SystemProperties; |
Jamie Gennis | 6ad0452 | 2013-04-15 18:53:24 -0700 | [diff] [blame] | 33 | import android.os.Trace; |
Bill Yi | 9a76e9b | 2014-04-29 18:52:48 -0700 | [diff] [blame] | 34 | import android.system.ErrnoException; |
Elliott Hughes | 860c591 | 2014-04-28 19:19:13 -0700 | [diff] [blame] | 35 | import android.system.Os; |
| 36 | import android.system.OsConstants; |
Elliott Hughes | 894724b | 2014-12-15 12:39:51 -0800 | [diff] [blame] | 37 | import android.system.StructPollfd; |
Raph Levien | c3dd1c1 | 2015-04-06 10:37:57 -0700 | [diff] [blame] | 38 | import android.text.Hyphenator; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 39 | import android.util.EventLog; |
| 40 | import android.util.Log; |
Torne (Richard Coles) | 08cfaf6 | 2014-05-08 16:07:05 +0100 | [diff] [blame] | 41 | import android.webkit.WebViewFactory; |
Andreas Gampe | ddc1397 | 2016-02-26 16:54:59 -0800 | [diff] [blame] | 42 | import android.widget.TextView; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 43 | |
Jeff Sharkey | fdeeeea | 2016-01-11 17:34:24 -0700 | [diff] [blame] | 44 | import com.android.internal.os.InstallerConnection.InstallerException; |
| 45 | |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 46 | import dalvik.system.DexFile; |
| 47 | import dalvik.system.PathClassLoader; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 48 | import dalvik.system.VMRuntime; |
Andreas Gampe | 1ef8aef | 2016-04-11 08:39:52 -0700 | [diff] [blame] | 49 | import dalvik.system.ZygoteHooks; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 50 | |
Brian Carlstrom | 46703b0 | 2011-04-06 15:41:29 -0700 | [diff] [blame] | 51 | import libcore.io.IoUtils; |
| 52 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 53 | import java.io.BufferedReader; |
| 54 | import java.io.FileDescriptor; |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 55 | import java.io.FileInputStream; |
| 56 | import java.io.FileNotFoundException; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 57 | import java.io.IOException; |
| 58 | import java.io.InputStream; |
| 59 | import java.io.InputStreamReader; |
| 60 | import java.lang.reflect.InvocationTargetException; |
| 61 | import java.lang.reflect.Method; |
Sergio Giro | 6cb7b1c | 2016-05-13 16:34:46 +0100 | [diff] [blame] | 62 | import java.security.Security; |
| 63 | import java.security.Provider; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 64 | import java.util.ArrayList; |
| 65 | |
| 66 | /** |
| 67 | * Startup class for the zygote process. |
| 68 | * |
| 69 | * Pre-initializes some classes, and then waits for commands on a UNIX domain |
Elliott Hughes | e1dfcb7 | 2011-07-08 11:08:07 -0700 | [diff] [blame] | 70 | * socket. Based on these commands, forks off child processes that inherit |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 71 | * the initial state of the VM. |
| 72 | * |
| 73 | * Please see {@link ZygoteConnection.Arguments} for documentation on the |
| 74 | * client protocol. |
| 75 | * |
| 76 | * @hide |
| 77 | */ |
| 78 | public class ZygoteInit { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 79 | private static final String TAG = "Zygote"; |
| 80 | |
Romain Guy | c5e3638 | 2013-05-09 11:08:17 -0700 | [diff] [blame] | 81 | private static final String PROPERTY_DISABLE_OPENGL_PRELOADING = "ro.zygote.disable_gl_preload"; |
Luis Hector Chavez | 5dd239a | 2015-10-06 14:01:45 -0700 | [diff] [blame] | 82 | private static final String PROPERTY_RUNNING_IN_CONTAINER = "ro.boot.container"; |
Romain Guy | c5e3638 | 2013-05-09 11:08:17 -0700 | [diff] [blame] | 83 | |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 84 | private static final String ANDROID_SOCKET_PREFIX = "ANDROID_SOCKET_"; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 85 | |
| 86 | private static final int LOG_BOOT_PROGRESS_PRELOAD_START = 3020; |
| 87 | private static final int LOG_BOOT_PROGRESS_PRELOAD_END = 3030; |
| 88 | |
| 89 | /** when preloading, GC after allocating this many bytes */ |
| 90 | private static final int PRELOAD_GC_THRESHOLD = 50000; |
| 91 | |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 92 | private static final String ABI_LIST_ARG = "--abi-list="; |
| 93 | |
| 94 | private static final String SOCKET_NAME_ARG = "--socket-name="; |
Barry Hayes | 0b3533a | 2010-01-20 12:46:47 -0800 | [diff] [blame] | 95 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 96 | private static LocalServerSocket sServerSocket; |
| 97 | |
| 98 | /** |
| 99 | * Used to pre-load resources. We hold a global reference on it so it |
| 100 | * never gets destroyed. |
| 101 | */ |
| 102 | private static Resources mResources; |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 103 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 104 | /** |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 105 | * The path of a file that contains classes to preload. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 106 | */ |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 107 | private static final String PRELOADED_CLASSES = "/system/etc/preloaded-classes"; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 108 | |
| 109 | /** Controls whether we should preload resources during zygote init. */ |
Steve Paik | 3c27a23 | 2015-06-10 18:25:44 -0700 | [diff] [blame] | 110 | public static final boolean PRELOAD_RESOURCES = true; |
Andy McFadden | 599c918 | 2009-04-08 00:35:56 -0700 | [diff] [blame] | 111 | |
| 112 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 113 | * Registers a server socket for zygote command connections |
| 114 | * |
| 115 | * @throws RuntimeException when open fails |
| 116 | */ |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 117 | private static void registerZygoteSocket(String socketName) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 118 | if (sServerSocket == null) { |
| 119 | int fileDesc; |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 120 | final String fullSocketName = ANDROID_SOCKET_PREFIX + socketName; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 121 | try { |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 122 | String env = System.getenv(fullSocketName); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 123 | fileDesc = Integer.parseInt(env); |
| 124 | } catch (RuntimeException ex) { |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 125 | throw new RuntimeException(fullSocketName + " unset or invalid", ex); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | try { |
Elliott Hughes | 3fe5951 | 2014-12-12 14:07:34 -0800 | [diff] [blame] | 129 | FileDescriptor fd = new FileDescriptor(); |
| 130 | fd.setInt$(fileDesc); |
| 131 | sServerSocket = new LocalServerSocket(fd); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 132 | } catch (IOException ex) { |
| 133 | throw new RuntimeException( |
| 134 | "Error binding to local socket '" + fileDesc + "'", ex); |
| 135 | } |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Waits for and accepts a single command connection. Throws |
| 141 | * RuntimeException on failure. |
| 142 | */ |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 143 | private static ZygoteConnection acceptCommandPeer(String abiList) { |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 144 | try { |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 145 | return new ZygoteConnection(sServerSocket.accept(), abiList); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 146 | } catch (IOException ex) { |
| 147 | throw new RuntimeException( |
| 148 | "IOException during accept()", ex); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * Close and clean up zygote sockets. Called on shutdown and on the |
| 154 | * child's exit path. |
| 155 | */ |
| 156 | static void closeServerSocket() { |
| 157 | try { |
| 158 | if (sServerSocket != null) { |
Dave Platt | 02f042d | 2013-12-12 15:45:49 -0800 | [diff] [blame] | 159 | FileDescriptor fd = sServerSocket.getFileDescriptor(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 160 | sServerSocket.close(); |
Dave Platt | 02f042d | 2013-12-12 15:45:49 -0800 | [diff] [blame] | 161 | if (fd != null) { |
Bill Yi | 9a76e9b | 2014-04-29 18:52:48 -0700 | [diff] [blame] | 162 | Os.close(fd); |
Dave Platt | 02f042d | 2013-12-12 15:45:49 -0800 | [diff] [blame] | 163 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 164 | } |
| 165 | } catch (IOException ex) { |
| 166 | Log.e(TAG, "Zygote: error closing sockets", ex); |
Bill Yi | 9a76e9b | 2014-04-29 18:52:48 -0700 | [diff] [blame] | 167 | } catch (ErrnoException ex) { |
Dave Platt | 02f042d | 2013-12-12 15:45:49 -0800 | [diff] [blame] | 168 | Log.e(TAG, "Zygote: error closing descriptor", ex); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | sServerSocket = null; |
| 172 | } |
| 173 | |
Dave Platt | 89d4c89 | 2014-02-05 17:06:42 -0800 | [diff] [blame] | 174 | /** |
| 175 | * Return the server socket's underlying file descriptor, so that |
| 176 | * ZygoteConnection can pass it to the native code for proper |
| 177 | * closure after a child process is forked off. |
| 178 | */ |
| 179 | |
| 180 | static FileDescriptor getServerSocketFileDescriptor() { |
| 181 | return sServerSocket.getFileDescriptor(); |
| 182 | } |
| 183 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 184 | private static final int UNPRIVILEGED_UID = 9999; |
| 185 | private static final int UNPRIVILEGED_GID = 9999; |
| 186 | |
| 187 | private static final int ROOT_UID = 0; |
| 188 | private static final int ROOT_GID = 0; |
| 189 | |
Jeff Brown | 0c2313d | 2011-06-10 22:46:40 -0700 | [diff] [blame] | 190 | static void preload() { |
Bill Yi | 9a76e9b | 2014-04-29 18:52:48 -0700 | [diff] [blame] | 191 | Log.d(TAG, "begin preload"); |
Neil Fuller | 41c9dc3 | 2016-05-09 16:55:36 +0100 | [diff] [blame] | 192 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "BeginIcuCachePinning"); |
| 193 | beginIcuCachePinning(); |
| 194 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 195 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadClasses"); |
| 196 | preloadClasses(); |
| 197 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 198 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadResources"); |
| 199 | preloadResources(); |
| 200 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 201 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadOpenGL"); |
Romain Guy | 74c6912 | 2013-05-08 17:54:20 -0700 | [diff] [blame] | 202 | preloadOpenGL(); |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 203 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
Brian Carlstrom | 6c9af96 | 2014-09-11 15:36:00 -0700 | [diff] [blame] | 204 | preloadSharedLibraries(); |
Raph Levien | c3dd1c1 | 2015-04-06 10:37:57 -0700 | [diff] [blame] | 205 | preloadTextResources(); |
Torne (Richard Coles) | 08cfaf6 | 2014-05-08 16:07:05 +0100 | [diff] [blame] | 206 | // Ask the WebViewFactory to do any initialization that must run in the zygote process, |
| 207 | // for memory sharing purposes. |
| 208 | WebViewFactory.prepareWebViewInZygote(); |
Neil Fuller | 41c9dc3 | 2016-05-09 16:55:36 +0100 | [diff] [blame] | 209 | endIcuCachePinning(); |
Sergio Giro | 6cb7b1c | 2016-05-13 16:34:46 +0100 | [diff] [blame] | 210 | warmUpJcaProviders(); |
Bill Yi | 9a76e9b | 2014-04-29 18:52:48 -0700 | [diff] [blame] | 211 | Log.d(TAG, "end preload"); |
Romain Guy | 74c6912 | 2013-05-08 17:54:20 -0700 | [diff] [blame] | 212 | } |
| 213 | |
Neil Fuller | 41c9dc3 | 2016-05-09 16:55:36 +0100 | [diff] [blame] | 214 | private static void beginIcuCachePinning() { |
| 215 | // Pin ICU data in memory from this point that would normally be held by soft references. |
| 216 | // Without this, any references created immediately below or during class preloading |
| 217 | // would be collected when the Zygote GC runs in gcAndFinalize(). |
| 218 | Log.i(TAG, "Installing ICU cache reference pinning..."); |
| 219 | |
| 220 | CacheValue.setStrength(CacheValue.Strength.STRONG); |
| 221 | |
| 222 | Log.i(TAG, "Preloading ICU data..."); |
| 223 | // Explicitly exercise code to cache data apps are likely to need. |
| 224 | ULocale[] localesToPin = { ULocale.ROOT, ULocale.US, ULocale.getDefault() }; |
| 225 | for (ULocale uLocale : localesToPin) { |
| 226 | new DecimalFormatSymbols(uLocale); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | private static void endIcuCachePinning() { |
| 231 | // All cache references created by ICU from this point will be soft. |
| 232 | CacheValue.setStrength(CacheValue.Strength.SOFT); |
| 233 | |
| 234 | Log.i(TAG, "Uninstalled ICU cache reference pinning..."); |
| 235 | } |
| 236 | |
Brian Carlstrom | 6c9af96 | 2014-09-11 15:36:00 -0700 | [diff] [blame] | 237 | private static void preloadSharedLibraries() { |
| 238 | Log.i(TAG, "Preloading shared libraries..."); |
| 239 | System.loadLibrary("android"); |
| 240 | System.loadLibrary("compiler_rt"); |
| 241 | System.loadLibrary("jnigraphics"); |
| 242 | } |
| 243 | |
Romain Guy | 74c6912 | 2013-05-08 17:54:20 -0700 | [diff] [blame] | 244 | private static void preloadOpenGL() { |
Romain Guy | c5e3638 | 2013-05-09 11:08:17 -0700 | [diff] [blame] | 245 | if (!SystemProperties.getBoolean(PROPERTY_DISABLE_OPENGL_PRELOADING, false)) { |
| 246 | EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY); |
| 247 | } |
Jeff Brown | 0c2313d | 2011-06-10 22:46:40 -0700 | [diff] [blame] | 248 | } |
| 249 | |
Raph Levien | c3dd1c1 | 2015-04-06 10:37:57 -0700 | [diff] [blame] | 250 | private static void preloadTextResources() { |
| 251 | Hyphenator.init(); |
Andreas Gampe | ddc1397 | 2016-02-26 16:54:59 -0800 | [diff] [blame] | 252 | TextView.preloadFontCache(); |
Raph Levien | c3dd1c1 | 2015-04-06 10:37:57 -0700 | [diff] [blame] | 253 | } |
| 254 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 255 | /** |
Sergio Giro | 6cb7b1c | 2016-05-13 16:34:46 +0100 | [diff] [blame] | 256 | * Warm up the providers that are already registered. |
| 257 | * |
| 258 | * By doing it here we avoid that each app does it when requesting a service from the |
| 259 | * provider for the first time. |
| 260 | */ |
| 261 | private static void warmUpJcaProviders() { |
| 262 | long startTime = SystemClock.uptimeMillis(); |
| 263 | Trace.traceBegin( |
| 264 | Trace.TRACE_TAG_DALVIK, "Starting warm up of JCA providers"); |
| 265 | for (Provider p : Security.getProviders()) { |
| 266 | p.warmUpServiceProvision(); |
| 267 | } |
| 268 | Log.i(TAG, "Warmed up JCA providers in " |
| 269 | + (SystemClock.uptimeMillis()-startTime) + "ms."); |
| 270 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 271 | } |
| 272 | |
| 273 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 274 | * Performs Zygote process initialization. Loads and initializes |
| 275 | * commonly used classes. |
| 276 | * |
| 277 | * Most classes only cause a few hundred bytes to be allocated, but |
| 278 | * a few will allocate a dozen Kbytes (in one case, 500+K). |
| 279 | */ |
| 280 | private static void preloadClasses() { |
| 281 | final VMRuntime runtime = VMRuntime.getRuntime(); |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 282 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 283 | InputStream is; |
| 284 | try { |
| 285 | is = new FileInputStream(PRELOADED_CLASSES); |
| 286 | } catch (FileNotFoundException e) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 287 | Log.e(TAG, "Couldn't find " + PRELOADED_CLASSES + "."); |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 288 | return; |
| 289 | } |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 290 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 291 | Log.i(TAG, "Preloading classes..."); |
| 292 | long startTime = SystemClock.uptimeMillis(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 293 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 294 | // Drop root perms while running static initializers. |
Narayan Kamath | 23e6878 | 2015-01-16 17:22:41 +0000 | [diff] [blame] | 295 | final int reuid = Os.getuid(); |
| 296 | final int regid = Os.getgid(); |
| 297 | |
| 298 | // We need to drop root perms only if we're already root. In the case of "wrapped" |
| 299 | // processes (see WrapperInit), this function is called from an unprivileged uid |
| 300 | // and gid. |
| 301 | boolean droppedPriviliges = false; |
| 302 | if (reuid == ROOT_UID && regid == ROOT_GID) { |
| 303 | try { |
| 304 | Os.setregid(ROOT_GID, UNPRIVILEGED_GID); |
| 305 | Os.setreuid(ROOT_UID, UNPRIVILEGED_UID); |
| 306 | } catch (ErrnoException ex) { |
| 307 | throw new RuntimeException("Failed to drop root", ex); |
| 308 | } |
| 309 | |
| 310 | droppedPriviliges = true; |
Elliott Hughes | 26b56e6 | 2014-12-17 12:28:29 -0800 | [diff] [blame] | 311 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 312 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 313 | // Alter the target heap utilization. With explicit GCs this |
| 314 | // is not likely to have any effect. |
| 315 | float defaultUtilization = runtime.getTargetHeapUtilization(); |
| 316 | runtime.setTargetHeapUtilization(0.8f); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 317 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 318 | try { |
| 319 | BufferedReader br |
| 320 | = new BufferedReader(new InputStreamReader(is), 256); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 321 | |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 322 | int count = 0; |
| 323 | String line; |
| 324 | while ((line = br.readLine()) != null) { |
| 325 | // Skip comments and blank lines. |
| 326 | line = line.trim(); |
| 327 | if (line.startsWith("#") || line.equals("")) { |
| 328 | continue; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 329 | } |
| 330 | |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 331 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadClass " + line); |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 332 | try { |
| 333 | if (false) { |
| 334 | Log.v(TAG, "Preloading " + line + "..."); |
| 335 | } |
Andreas Gampe | dd8e5fb | 2015-04-21 09:01:51 -0700 | [diff] [blame] | 336 | // Load and explicitly initialize the given class. Use |
| 337 | // Class.forName(String, boolean, ClassLoader) to avoid repeated stack lookups |
| 338 | // (to derive the caller's class-loader). Use true to force initialization, and |
| 339 | // null for the boot classpath class-loader (could as well cache the |
| 340 | // class-loader of this class in a variable). |
Andreas Gampe | c917f74 | 2015-04-20 19:16:37 -0700 | [diff] [blame] | 341 | Class.forName(line, true, null); |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 342 | count++; |
| 343 | } catch (ClassNotFoundException e) { |
| 344 | Log.w(TAG, "Class not found for preloading: " + line); |
| 345 | } catch (UnsatisfiedLinkError e) { |
| 346 | Log.w(TAG, "Problem preloading " + line + ": " + e); |
| 347 | } catch (Throwable t) { |
| 348 | Log.e(TAG, "Error preloading " + line + ".", t); |
| 349 | if (t instanceof Error) { |
| 350 | throw (Error) t; |
| 351 | } |
| 352 | if (t instanceof RuntimeException) { |
| 353 | throw (RuntimeException) t; |
| 354 | } |
| 355 | throw new RuntimeException(t); |
| 356 | } |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 357 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 358 | } |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 359 | |
| 360 | Log.i(TAG, "...preloaded " + count + " classes in " |
| 361 | + (SystemClock.uptimeMillis()-startTime) + "ms."); |
| 362 | } catch (IOException e) { |
| 363 | Log.e(TAG, "Error reading " + PRELOADED_CLASSES + ".", e); |
| 364 | } finally { |
| 365 | IoUtils.closeQuietly(is); |
| 366 | // Restore default. |
| 367 | runtime.setTargetHeapUtilization(defaultUtilization); |
| 368 | |
| 369 | // Fill in dex caches with classes, fields, and methods brought in by preloading. |
Yasuhiro Matsuda | 1ab43d5 | 2015-06-30 17:07:32 +0900 | [diff] [blame] | 370 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PreloadDexCaches"); |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 371 | runtime.preloadDexCaches(); |
Yasuhiro Matsuda | 1ab43d5 | 2015-06-30 17:07:32 +0900 | [diff] [blame] | 372 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
Ying Wang | d0c4535 | 2014-11-13 15:22:47 -0800 | [diff] [blame] | 373 | |
Narayan Kamath | 23e6878 | 2015-01-16 17:22:41 +0000 | [diff] [blame] | 374 | // Bring back root. We'll need it later if we're in the zygote. |
| 375 | if (droppedPriviliges) { |
| 376 | try { |
| 377 | Os.setreuid(ROOT_UID, ROOT_UID); |
| 378 | Os.setregid(ROOT_GID, ROOT_GID); |
| 379 | } catch (ErrnoException ex) { |
| 380 | throw new RuntimeException("Failed to restore root", ex); |
| 381 | } |
Elliott Hughes | 26b56e6 | 2014-12-17 12:28:29 -0800 | [diff] [blame] | 382 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 383 | } |
| 384 | } |
| 385 | |
| 386 | /** |
| 387 | * Load in commonly used resources, so they can be shared across |
| 388 | * processes. |
| 389 | * |
| 390 | * These tend to be a few Kbytes, but are frequently in the 20-40K |
| 391 | * range, and occasionally even larger. |
| 392 | */ |
| 393 | private static void preloadResources() { |
| 394 | final VMRuntime runtime = VMRuntime.getRuntime(); |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 395 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 396 | try { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 397 | mResources = Resources.getSystem(); |
| 398 | mResources.startPreloading(); |
| 399 | if (PRELOAD_RESOURCES) { |
| 400 | Log.i(TAG, "Preloading resources..."); |
| 401 | |
| 402 | long startTime = SystemClock.uptimeMillis(); |
| 403 | TypedArray ar = mResources.obtainTypedArray( |
| 404 | com.android.internal.R.array.preloaded_drawables); |
Filip Gruszczynski | 811dc3b | 2015-11-23 12:34:22 -0800 | [diff] [blame] | 405 | int N = preloadDrawables(ar); |
Jeff Brown | 14577c4 | 2012-03-08 16:40:14 -0800 | [diff] [blame] | 406 | ar.recycle(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 407 | Log.i(TAG, "...preloaded " + N + " resources in " |
| 408 | + (SystemClock.uptimeMillis()-startTime) + "ms."); |
| 409 | |
| 410 | startTime = SystemClock.uptimeMillis(); |
| 411 | ar = mResources.obtainTypedArray( |
| 412 | com.android.internal.R.array.preloaded_color_state_lists); |
Filip Gruszczynski | 811dc3b | 2015-11-23 12:34:22 -0800 | [diff] [blame] | 413 | N = preloadColorStateLists(ar); |
Jeff Brown | 14577c4 | 2012-03-08 16:40:14 -0800 | [diff] [blame] | 414 | ar.recycle(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 415 | Log.i(TAG, "...preloaded " + N + " resources in " |
| 416 | + (SystemClock.uptimeMillis()-startTime) + "ms."); |
Filip Gruszczynski | 811dc3b | 2015-11-23 12:34:22 -0800 | [diff] [blame] | 417 | |
| 418 | if (mResources.getBoolean( |
| 419 | com.android.internal.R.bool.config_freeformWindowManagement)) { |
| 420 | startTime = SystemClock.uptimeMillis(); |
| 421 | ar = mResources.obtainTypedArray( |
| 422 | com.android.internal.R.array.preloaded_freeform_multi_window_drawables); |
| 423 | N = preloadDrawables(ar); |
| 424 | ar.recycle(); |
| 425 | Log.i(TAG, "...preloaded " + N + " resource in " |
| 426 | + (SystemClock.uptimeMillis() - startTime) + "ms."); |
| 427 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 428 | } |
| 429 | mResources.finishPreloading(); |
| 430 | } catch (RuntimeException e) { |
| 431 | Log.w(TAG, "Failure preloading resources", e); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 432 | } |
| 433 | } |
| 434 | |
Filip Gruszczynski | 811dc3b | 2015-11-23 12:34:22 -0800 | [diff] [blame] | 435 | private static int preloadColorStateLists(TypedArray ar) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 436 | int N = ar.length(); |
| 437 | for (int i=0; i<N; i++) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 438 | int id = ar.getResourceId(i, 0); |
Joe Onorato | 43a1765 | 2011-04-06 19:22:23 -0700 | [diff] [blame] | 439 | if (false) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 440 | Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); |
| 441 | } |
| 442 | if (id != 0) { |
Alan Viverette | 77bb6f1 | 2015-02-11 17:24:33 -0800 | [diff] [blame] | 443 | if (mResources.getColorStateList(id, null) == null) { |
Dianne Hackborn | dde331c | 2012-08-03 14:01:57 -0700 | [diff] [blame] | 444 | throw new IllegalArgumentException( |
| 445 | "Unable to find preloaded color resource #0x" |
| 446 | + Integer.toHexString(id) |
| 447 | + " (" + ar.getString(i) + ")"); |
| 448 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 449 | } |
| 450 | } |
| 451 | return N; |
| 452 | } |
| 453 | |
| 454 | |
Filip Gruszczynski | 811dc3b | 2015-11-23 12:34:22 -0800 | [diff] [blame] | 455 | private static int preloadDrawables(TypedArray ar) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 456 | int N = ar.length(); |
| 457 | for (int i=0; i<N; i++) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 458 | int id = ar.getResourceId(i, 0); |
Joe Onorato | 43a1765 | 2011-04-06 19:22:23 -0700 | [diff] [blame] | 459 | if (false) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 460 | Log.v(TAG, "Preloading resource #" + Integer.toHexString(id)); |
| 461 | } |
| 462 | if (id != 0) { |
Alan Viverette | 84e001a | 2014-09-22 00:04:22 -0700 | [diff] [blame] | 463 | if (mResources.getDrawable(id, null) == null) { |
Dianne Hackborn | dde331c | 2012-08-03 14:01:57 -0700 | [diff] [blame] | 464 | throw new IllegalArgumentException( |
| 465 | "Unable to find preloaded drawable resource #0x" |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 466 | + Integer.toHexString(id) |
Dianne Hackborn | dde331c | 2012-08-03 14:01:57 -0700 | [diff] [blame] | 467 | + " (" + ar.getString(i) + ")"); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 468 | } |
| 469 | } |
| 470 | } |
| 471 | return N; |
| 472 | } |
| 473 | |
| 474 | /** |
| 475 | * Runs several special GCs to try to clean up a few generations of |
| 476 | * softly- and final-reachable objects, along with any other garbage. |
| 477 | * This is only useful just before a fork(). |
| 478 | */ |
Mathieu Chartier | 9a88f10 | 2014-08-20 10:24:11 -0700 | [diff] [blame] | 479 | /*package*/ static void gcAndFinalize() { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 480 | final VMRuntime runtime = VMRuntime.getRuntime(); |
| 481 | |
| 482 | /* runFinalizationSync() lets finalizers be called in Zygote, |
| 483 | * which doesn't have a HeapWorker thread. |
| 484 | */ |
Brian Carlstrom | 08065b9 | 2011-04-01 15:49:41 -0700 | [diff] [blame] | 485 | System.gc(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 486 | runtime.runFinalizationSync(); |
Brian Carlstrom | 08065b9 | 2011-04-01 15:49:41 -0700 | [diff] [blame] | 487 | System.gc(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | /** |
| 491 | * Finish remaining work for the newly forked system server process. |
| 492 | */ |
| 493 | private static void handleSystemServerProcess( |
| 494 | ZygoteConnection.Arguments parsedArgs) |
| 495 | throws ZygoteInit.MethodAndArgsCaller { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 496 | |
| 497 | closeServerSocket(); |
| 498 | |
Mike Lockwood | 90960e8 | 2010-08-06 09:15:25 -0400 | [diff] [blame] | 499 | // set umask to 0077 so new files and directories will default to owner-only permissions. |
Elliott Hughes | 860c591 | 2014-04-28 19:19:13 -0700 | [diff] [blame] | 500 | Os.umask(S_IRWXG | S_IRWXO); |
Mike Lockwood | 90960e8 | 2010-08-06 09:15:25 -0400 | [diff] [blame] | 501 | |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 502 | if (parsedArgs.niceName != null) { |
| 503 | Process.setArgV0(parsedArgs.niceName); |
| 504 | } |
| 505 | |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 506 | final String systemServerClasspath = Os.getenv("SYSTEMSERVERCLASSPATH"); |
| 507 | if (systemServerClasspath != null) { |
| 508 | performSystemServerDexOpt(systemServerClasspath); |
| 509 | } |
| 510 | |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 511 | if (parsedArgs.invokeWith != null) { |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 512 | String[] args = parsedArgs.remainingArgs; |
| 513 | // If we have a non-null system server class path, we'll have to duplicate the |
| 514 | // existing arguments and append the classpath to it. ART will handle the classpath |
| 515 | // correctly when we exec a new process. |
| 516 | if (systemServerClasspath != null) { |
| 517 | String[] amendedArgs = new String[args.length + 2]; |
| 518 | amendedArgs[0] = "-cp"; |
| 519 | amendedArgs[1] = systemServerClasspath; |
| 520 | System.arraycopy(parsedArgs.remainingArgs, 0, amendedArgs, 2, parsedArgs.remainingArgs.length); |
| 521 | } |
| 522 | |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 523 | WrapperInit.execApplication(parsedArgs.invokeWith, |
Elliott Hughes | e1dfcb7 | 2011-07-08 11:08:07 -0700 | [diff] [blame] | 524 | parsedArgs.niceName, parsedArgs.targetSdkVersion, |
Narayan Kamath | 37ad4b0 | 2015-01-19 16:05:24 +0000 | [diff] [blame] | 525 | VMRuntime.getCurrentInstructionSet(), null, args); |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 526 | } else { |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 527 | ClassLoader cl = null; |
| 528 | if (systemServerClasspath != null) { |
Dimitry Ivanov | 89dad33 | 2016-04-20 16:02:00 -0700 | [diff] [blame] | 529 | cl = createSystemServerClassLoader(systemServerClasspath, |
| 530 | parsedArgs.targetSdkVersion); |
| 531 | |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 532 | Thread.currentThread().setContextClassLoader(cl); |
| 533 | } |
| 534 | |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 535 | /* |
| 536 | * Pass the remaining arguments to SystemServer. |
| 537 | */ |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 538 | RuntimeInit.zygoteInit(parsedArgs.targetSdkVersion, parsedArgs.remainingArgs, cl); |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 539 | } |
| 540 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 541 | /* should never reach here */ |
| 542 | } |
| 543 | |
| 544 | /** |
Dimitry Ivanov | 89dad33 | 2016-04-20 16:02:00 -0700 | [diff] [blame] | 545 | * Creates a PathClassLoader for the system server. It also creates |
| 546 | * a shared namespace associated with the classloader to let it access |
| 547 | * platform-private native libraries. |
| 548 | */ |
| 549 | private static PathClassLoader createSystemServerClassLoader(String systemServerClasspath, |
| 550 | int targetSdkVersion) { |
| 551 | String librarySearchPath = System.getProperty("java.library.path"); |
| 552 | |
| 553 | return PathClassLoaderFactory.createClassLoader(systemServerClasspath, |
| 554 | librarySearchPath, |
| 555 | null /* libraryPermittedPath */, |
| 556 | ClassLoader.getSystemClassLoader(), |
| 557 | targetSdkVersion, |
| 558 | true /* isNamespaceShared */); |
| 559 | } |
| 560 | |
| 561 | /** |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 562 | * Performs dex-opt on the elements of {@code classPath}, if needed. We |
| 563 | * choose the instruction set of the current runtime. |
| 564 | */ |
| 565 | private static void performSystemServerDexOpt(String classPath) { |
| 566 | final String[] classPathElements = classPath.split(":"); |
| 567 | final InstallerConnection installer = new InstallerConnection(); |
Makoto Onuki | c8a2cfe | 2015-06-23 16:33:48 -0700 | [diff] [blame] | 568 | installer.waitForConnection(); |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 569 | final String instructionSet = VMRuntime.getRuntime().vmInstructionSet(); |
| 570 | |
| 571 | try { |
Jeff Hao | c7b9482 | 2016-03-16 15:56:07 -0700 | [diff] [blame] | 572 | String sharedLibraries = ""; |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 573 | for (String classPathElement : classPathElements) { |
Calin Juravle | 693f997 | 2016-02-25 15:26:20 +0000 | [diff] [blame] | 574 | // System server is fully AOTed and never profiled |
| 575 | // for profile guided compilation. |
Andreas Gampe | bdd30d8 | 2016-03-20 11:32:11 -0700 | [diff] [blame] | 576 | // TODO: Make this configurable between INTERPRET_ONLY, SPEED, SPACE and EVERYTHING? |
Richard Uhler | 7b08b35 | 2015-03-25 16:25:57 -0700 | [diff] [blame] | 577 | final int dexoptNeeded = DexFile.getDexOptNeeded( |
Andreas Gampe | bdd30d8 | 2016-03-20 11:32:11 -0700 | [diff] [blame] | 578 | classPathElement, instructionSet, "speed", |
| 579 | false /* newProfile */); |
Richard Uhler | 7b08b35 | 2015-03-25 16:25:57 -0700 | [diff] [blame] | 580 | if (dexoptNeeded != DexFile.NO_DEXOPT_NEEDED) { |
Todd Kennedy | fa54ab7 | 2015-09-25 07:46:12 -0700 | [diff] [blame] | 581 | installer.dexopt(classPathElement, Process.SYSTEM_UID, instructionSet, |
Jeff Hao | c7b9482 | 2016-03-16 15:56:07 -0700 | [diff] [blame] | 582 | dexoptNeeded, 0 /*dexFlags*/, "speed", null /*volumeUuid*/, |
| 583 | sharedLibraries); |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 584 | } |
Jeff Hao | c7b9482 | 2016-03-16 15:56:07 -0700 | [diff] [blame] | 585 | if (!sharedLibraries.isEmpty()) { |
| 586 | sharedLibraries += ":"; |
| 587 | } |
| 588 | sharedLibraries += classPathElement; |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 589 | } |
Jeff Sharkey | fdeeeea | 2016-01-11 17:34:24 -0700 | [diff] [blame] | 590 | } catch (IOException | InstallerException e) { |
| 591 | throw new RuntimeException("Error starting system_server", e); |
Narayan Kamath | 29564cd | 2014-08-07 10:57:40 +0100 | [diff] [blame] | 592 | } finally { |
| 593 | installer.disconnect(); |
| 594 | } |
| 595 | } |
| 596 | |
| 597 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 598 | * Prepare the arguments and fork for the system server process. |
| 599 | */ |
Narayan Kamath | 64cd907 | 2014-05-13 13:35:14 +0100 | [diff] [blame] | 600 | private static boolean startSystemServer(String abiList, String socketName) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 601 | throws MethodAndArgsCaller, RuntimeException { |
Alex Klyubin | 48a06e7 | 2013-04-19 10:01:42 -0700 | [diff] [blame] | 602 | long capabilities = posixCapabilitiesAsBits( |
Philip Cuadra | 7bd0fdd | 2016-04-28 15:26:49 -0700 | [diff] [blame] | 603 | OsConstants.CAP_IPC_LOCK, |
Alex Klyubin | 48a06e7 | 2013-04-19 10:01:42 -0700 | [diff] [blame] | 604 | OsConstants.CAP_KILL, |
| 605 | OsConstants.CAP_NET_ADMIN, |
| 606 | OsConstants.CAP_NET_BIND_SERVICE, |
| 607 | OsConstants.CAP_NET_BROADCAST, |
| 608 | OsConstants.CAP_NET_RAW, |
Alex Klyubin | 48a06e7 | 2013-04-19 10:01:42 -0700 | [diff] [blame] | 609 | OsConstants.CAP_SYS_MODULE, |
| 610 | OsConstants.CAP_SYS_NICE, |
| 611 | OsConstants.CAP_SYS_RESOURCE, |
| 612 | OsConstants.CAP_SYS_TIME, |
| 613 | OsConstants.CAP_SYS_TTY_CONFIG |
| 614 | ); |
Luis Hector Chavez | 5dd239a | 2015-10-06 14:01:45 -0700 | [diff] [blame] | 615 | /* Containers run without this capability, so avoid setting it in that case */ |
| 616 | if (!SystemProperties.getBoolean(PROPERTY_RUNNING_IN_CONTAINER, false)) { |
| 617 | capabilities |= posixCapabilitiesAsBits(OsConstants.CAP_BLOCK_SUSPEND); |
| 618 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 619 | /* Hardcoded command line to start the system server */ |
| 620 | String args[] = { |
| 621 | "--setuid=1000", |
| 622 | "--setgid=1000", |
Pavlin Radoslavov | 7016625 | 2015-11-23 17:13:25 -0800 | [diff] [blame] | 623 | "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1018,1021,1032,3001,3002,3003,3006,3007,3009,3010", |
Alex Klyubin | 48a06e7 | 2013-04-19 10:01:42 -0700 | [diff] [blame] | 624 | "--capabilities=" + capabilities + "," + capabilities, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 625 | "--nice-name=system_server", |
Narayan Kamath | b6b044a | 2015-02-13 17:31:25 +0000 | [diff] [blame] | 626 | "--runtime-args", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 627 | "com.android.server.SystemServer", |
| 628 | }; |
| 629 | ZygoteConnection.Arguments parsedArgs = null; |
| 630 | |
| 631 | int pid; |
| 632 | |
| 633 | try { |
| 634 | parsedArgs = new ZygoteConnection.Arguments(args); |
Jeff Brown | ebed7d6 | 2011-05-16 17:08:42 -0700 | [diff] [blame] | 635 | ZygoteConnection.applyDebuggerSystemProperty(parsedArgs); |
| 636 | ZygoteConnection.applyInvokeWithSystemProperty(parsedArgs); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 637 | |
| 638 | /* Request to fork the system server process */ |
| 639 | pid = Zygote.forkSystemServer( |
| 640 | parsedArgs.uid, parsedArgs.gid, |
Elliott Hughes | e1dfcb7 | 2011-07-08 11:08:07 -0700 | [diff] [blame] | 641 | parsedArgs.gids, |
| 642 | parsedArgs.debugFlags, |
| 643 | null, |
Andy McFadden | 1b4c796 | 2010-10-27 11:26:05 -0700 | [diff] [blame] | 644 | parsedArgs.permittedCapabilities, |
| 645 | parsedArgs.effectiveCapabilities); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 646 | } catch (IllegalArgumentException ex) { |
| 647 | throw new RuntimeException(ex); |
Bob Lee | e540833 | 2009-09-04 18:31:17 -0700 | [diff] [blame] | 648 | } |
| 649 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 650 | /* For child process */ |
| 651 | if (pid == 0) { |
Narayan Kamath | 64cd907 | 2014-05-13 13:35:14 +0100 | [diff] [blame] | 652 | if (hasSecondZygote(abiList)) { |
| 653 | waitForSecondaryZygote(socketName); |
| 654 | } |
| 655 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 656 | handleSystemServerProcess(parsedArgs); |
| 657 | } |
| 658 | |
| 659 | return true; |
| 660 | } |
| 661 | |
Alex Klyubin | 48a06e7 | 2013-04-19 10:01:42 -0700 | [diff] [blame] | 662 | /** |
| 663 | * Gets the bit array representation of the provided list of POSIX capabilities. |
| 664 | */ |
| 665 | private static long posixCapabilitiesAsBits(int... capabilities) { |
| 666 | long result = 0; |
| 667 | for (int capability : capabilities) { |
| 668 | if ((capability < 0) || (capability > OsConstants.CAP_LAST_CAP)) { |
| 669 | throw new IllegalArgumentException(String.valueOf(capability)); |
| 670 | } |
| 671 | result |= (1L << capability); |
| 672 | } |
| 673 | return result; |
| 674 | } |
| 675 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 676 | public static void main(String argv[]) { |
Andreas Gampe | 1ef8aef | 2016-04-11 08:39:52 -0700 | [diff] [blame] | 677 | // Mark zygote start. This ensures that thread creation will throw |
| 678 | // an error. |
| 679 | ZygoteHooks.startZygoteNoThreadCreation(); |
| 680 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 681 | try { |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 682 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "ZygoteInit"); |
| 683 | RuntimeInit.enableDdms(); |
| 684 | // Start profiling the zygote initialization. |
| 685 | SamplingProfilerIntegration.start(); |
| 686 | |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 687 | boolean startSystemServer = false; |
| 688 | String socketName = "zygote"; |
| 689 | String abiList = null; |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 690 | for (int i = 1; i < argv.length; i++) { |
| 691 | if ("start-system-server".equals(argv[i])) { |
| 692 | startSystemServer = true; |
| 693 | } else if (argv[i].startsWith(ABI_LIST_ARG)) { |
| 694 | abiList = argv[i].substring(ABI_LIST_ARG.length()); |
| 695 | } else if (argv[i].startsWith(SOCKET_NAME_ARG)) { |
| 696 | socketName = argv[i].substring(SOCKET_NAME_ARG.length()); |
| 697 | } else { |
| 698 | throw new RuntimeException("Unknown command line argument: " + argv[i]); |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 699 | } |
| 700 | } |
| 701 | |
Yasuhiro Matsuda | 25878b2 | 2015-09-03 16:18:21 +0900 | [diff] [blame] | 702 | if (abiList == null) { |
| 703 | throw new RuntimeException("No ABI list supplied."); |
| 704 | } |
| 705 | |
| 706 | registerZygoteSocket(socketName); |
| 707 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "ZygotePreload"); |
| 708 | EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_START, |
| 709 | SystemClock.uptimeMillis()); |
| 710 | preload(); |
| 711 | EventLog.writeEvent(LOG_BOOT_PROGRESS_PRELOAD_END, |
| 712 | SystemClock.uptimeMillis()); |
| 713 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 714 | |
| 715 | // Finish profiling the zygote initialization. |
| 716 | SamplingProfilerIntegration.writeZygoteSnapshot(); |
| 717 | |
| 718 | // Do an initial gc to clean up after startup |
| 719 | Trace.traceBegin(Trace.TRACE_TAG_DALVIK, "PostZygoteInitGC"); |
| 720 | gcAndFinalize(); |
| 721 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 722 | |
| 723 | Trace.traceEnd(Trace.TRACE_TAG_DALVIK); |
| 724 | |
Jamie Gennis | 6ad0452 | 2013-04-15 18:53:24 -0700 | [diff] [blame] | 725 | // Disable tracing so that forked processes do not inherit stale tracing tags from |
| 726 | // Zygote. |
| 727 | Trace.setTracingEnabled(false); |
| 728 | |
doheon1.lee | 885b742 | 2016-01-20 13:07:27 +0900 | [diff] [blame] | 729 | // Zygote process unmounts root storage spaces. |
| 730 | Zygote.nativeUnmountStorageOnInit(); |
| 731 | |
Andreas Gampe | 1ef8aef | 2016-04-11 08:39:52 -0700 | [diff] [blame] | 732 | ZygoteHooks.stopZygoteNoThreadCreation(); |
| 733 | |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 734 | if (startSystemServer) { |
Narayan Kamath | 64cd907 | 2014-05-13 13:35:14 +0100 | [diff] [blame] | 735 | startSystemServer(abiList, socketName); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | Log.i(TAG, "Accepting command socket connections"); |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 739 | runSelectLoop(abiList); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 740 | |
| 741 | closeServerSocket(); |
| 742 | } catch (MethodAndArgsCaller caller) { |
| 743 | caller.run(); |
| 744 | } catch (RuntimeException ex) { |
| 745 | Log.e(TAG, "Zygote died with exception", ex); |
| 746 | closeServerSocket(); |
| 747 | throw ex; |
| 748 | } |
| 749 | } |
| 750 | |
| 751 | /** |
Narayan Kamath | 64cd907 | 2014-05-13 13:35:14 +0100 | [diff] [blame] | 752 | * Return {@code true} if this device configuration has another zygote. |
| 753 | * |
| 754 | * We determine this by comparing the device ABI list with this zygotes |
| 755 | * list. If this zygote supports all ABIs this device supports, there won't |
| 756 | * be another zygote. |
| 757 | */ |
| 758 | private static boolean hasSecondZygote(String abiList) { |
| 759 | return !SystemProperties.get("ro.product.cpu.abilist").equals(abiList); |
| 760 | } |
| 761 | |
| 762 | private static void waitForSecondaryZygote(String socketName) { |
| 763 | String otherZygoteName = Process.ZYGOTE_SOCKET.equals(socketName) ? |
| 764 | Process.SECONDARY_ZYGOTE_SOCKET : Process.ZYGOTE_SOCKET; |
| 765 | while (true) { |
| 766 | try { |
| 767 | final Process.ZygoteState zs = Process.ZygoteState.connect(otherZygoteName); |
| 768 | zs.close(); |
| 769 | break; |
| 770 | } catch (IOException ioe) { |
| 771 | Log.w(TAG, "Got error connecting to zygote, retrying. msg= " + ioe.getMessage()); |
| 772 | } |
| 773 | |
| 774 | try { |
| 775 | Thread.sleep(1000); |
| 776 | } catch (InterruptedException ie) { |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 782 | * Runs the zygote process's select loop. Accepts new connections as |
| 783 | * they happen, and reads commands from connections one spawn-request's |
| 784 | * worth at a time. |
| 785 | * |
| 786 | * @throws MethodAndArgsCaller in a child process when a main() should |
| 787 | * be executed. |
| 788 | */ |
Narayan Kamath | c41638c | 2014-04-07 13:56:15 +0100 | [diff] [blame] | 789 | private static void runSelectLoop(String abiList) throws MethodAndArgsCaller { |
Nick Kralevich | cae3d9f | 2013-01-30 09:51:40 -0800 | [diff] [blame] | 790 | ArrayList<FileDescriptor> fds = new ArrayList<FileDescriptor>(); |
| 791 | ArrayList<ZygoteConnection> peers = new ArrayList<ZygoteConnection>(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 792 | |
| 793 | fds.add(sServerSocket.getFileDescriptor()); |
| 794 | peers.add(null); |
| 795 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 796 | while (true) { |
Elliott Hughes | 894724b | 2014-12-15 12:39:51 -0800 | [diff] [blame] | 797 | StructPollfd[] pollFds = new StructPollfd[fds.size()]; |
| 798 | for (int i = 0; i < pollFds.length; ++i) { |
| 799 | pollFds[i] = new StructPollfd(); |
| 800 | pollFds[i].fd = fds.get(i); |
| 801 | pollFds[i].events = (short) POLLIN; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 802 | } |
Elliott Hughes | 894724b | 2014-12-15 12:39:51 -0800 | [diff] [blame] | 803 | try { |
| 804 | Os.poll(pollFds, -1); |
| 805 | } catch (ErrnoException ex) { |
| 806 | throw new RuntimeException("poll failed", ex); |
| 807 | } |
| 808 | for (int i = pollFds.length - 1; i >= 0; --i) { |
| 809 | if ((pollFds[i].revents & POLLIN) == 0) { |
| 810 | continue; |
| 811 | } |
| 812 | if (i == 0) { |
| 813 | ZygoteConnection newPeer = acceptCommandPeer(abiList); |
| 814 | peers.add(newPeer); |
| 815 | fds.add(newPeer.getFileDesciptor()); |
| 816 | } else { |
| 817 | boolean done = peers.get(i).runOnce(); |
| 818 | if (done) { |
| 819 | peers.remove(i); |
| 820 | fds.remove(i); |
| 821 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 822 | } |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 828 | * Class not instantiable. |
| 829 | */ |
| 830 | private ZygoteInit() { |
| 831 | } |
| 832 | |
| 833 | /** |
| 834 | * Helper exception class which holds a method and arguments and |
| 835 | * can call them. This is used as part of a trampoline to get rid of |
| 836 | * the initial process setup stack frames. |
| 837 | */ |
| 838 | public static class MethodAndArgsCaller extends Exception |
| 839 | implements Runnable { |
| 840 | /** method to call */ |
| 841 | private final Method mMethod; |
| 842 | |
| 843 | /** argument array */ |
| 844 | private final String[] mArgs; |
| 845 | |
| 846 | public MethodAndArgsCaller(Method method, String[] args) { |
| 847 | mMethod = method; |
| 848 | mArgs = args; |
| 849 | } |
| 850 | |
| 851 | public void run() { |
| 852 | try { |
| 853 | mMethod.invoke(null, new Object[] { mArgs }); |
| 854 | } catch (IllegalAccessException ex) { |
| 855 | throw new RuntimeException(ex); |
| 856 | } catch (InvocationTargetException ex) { |
| 857 | Throwable cause = ex.getCause(); |
| 858 | if (cause instanceof RuntimeException) { |
| 859 | throw (RuntimeException) cause; |
| 860 | } else if (cause instanceof Error) { |
| 861 | throw (Error) cause; |
| 862 | } |
| 863 | throw new RuntimeException(ex); |
| 864 | } |
| 865 | } |
| 866 | } |
| 867 | } |