| 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.content.app; |
| 6 | |
| 7 | import android.app.Service; |
| 8 | import android.content.Context; |
| 9 | import android.content.Intent; |
| 10 | import android.graphics.SurfaceTexture; |
| 11 | import android.os.Bundle; |
| 12 | import android.os.IBinder; |
| 13 | import android.os.ParcelFileDescriptor; |
| 14 | import android.os.Process; |
| 15 | import android.os.RemoteException; |
| 16 | import android.util.Log; |
| 17 | import android.view.Surface; |
| 18 | |
| 19 | import org.chromium.base.CalledByNative; |
| 20 | import org.chromium.base.JNINamespace; |
| 21 | import org.chromium.content.browser.ChildProcessConnection; |
| 22 | import org.chromium.content.common.IChildProcessCallback; |
| 23 | import org.chromium.content.common.IChildProcessService; |
| 24 | import org.chromium.content.browser.ChildProcessLauncher; |
| 25 | import org.chromium.content.common.ProcessInitException; |
| 26 | |
| 27 | import java.util.ArrayList; |
| 28 | import java.util.concurrent.atomic.AtomicReference; |
| 29 | |
| 30 | /** |
| 31 | * This is the base class for child services; the [Non]SandboxedProcessService0, 1.. etc |
| 32 | * subclasses provide the concrete service entry points, to enable the browser to connect |
| 33 | * to more than one distinct process (i.e. one process per service number, up to limit of N). |
| 34 | * The embedding application must declare these service instances in the application section |
| 35 | * of its AndroidManifest.xml, for example with N entries of the form:- |
| 36 | * <service android:name="org.chromium.content.app.[Non]SandboxedProcessServiceX" |
| 37 | * android:process=":[non]sandboxed_processX" /> |
| 38 | * for X in 0...N-1 (where N is {@link ChildProcessLauncher#MAX_REGISTERED_SERVICES}) |
| 39 | */ |
| 40 | @JNINamespace("content") |
| 41 | public class ChildProcessService extends Service { |
| 42 | private static final String MAIN_THREAD_NAME = "ChildProcessMain"; |
| 43 | private static final String TAG = "ChildProcessService"; |
| 44 | private IChildProcessCallback mCallback; |
| 45 | |
| 46 | // This is the native "Main" thread for the renderer / utility process. |
| 47 | private Thread mMainThread; |
| 48 | // Parameters received via IPC, only accessed while holding the mMainThread monitor. |
| 49 | private String[] mCommandLineParams; |
| 50 | private int mCpuCount; |
| 51 | private long mCpuFeatures; |
| 52 | // Pairs IDs and file descriptors that should be registered natively. |
| 53 | private ArrayList<Integer> mFileIds; |
| 54 | private ArrayList<ParcelFileDescriptor> mFileFds; |
| 55 | |
| 56 | private static AtomicReference<Context> sContext = new AtomicReference<Context>(null); |
| 57 | private boolean mLibraryInitialized = false; |
| 58 | |
| 59 | // Binder object used by clients for this service. |
| 60 | private final IChildProcessService.Stub mBinder = new IChildProcessService.Stub() { |
| 61 | // NOTE: Implement any IChildProcessService methods here. |
| 62 | @Override |
| 63 | public int setupConnection(Bundle args, IChildProcessCallback callback) { |
| 64 | mCallback = callback; |
| 65 | synchronized (mMainThread) { |
| 66 | // Allow the command line to be set via bind() intent or setupConnection, but |
| 67 | // the FD can only be transferred here. |
| 68 | if (mCommandLineParams == null) { |
| 69 | mCommandLineParams = args.getStringArray( |
| 70 | ChildProcessConnection.EXTRA_COMMAND_LINE); |
| 71 | } |
| 72 | // We must have received the command line by now |
| 73 | assert mCommandLineParams != null; |
| 74 | mCpuCount = args.getInt(ChildProcessConnection.EXTRA_CPU_COUNT); |
| 75 | mCpuFeatures = args.getLong(ChildProcessConnection.EXTRA_CPU_FEATURES); |
| 76 | assert mCpuCount > 0; |
| 77 | mFileIds = new ArrayList<Integer>(); |
| 78 | mFileFds = new ArrayList<ParcelFileDescriptor>(); |
| 79 | for (int i = 0;; i++) { |
| 80 | String fdName = ChildProcessConnection.EXTRA_FILES_PREFIX + i |
| 81 | + ChildProcessConnection.EXTRA_FILES_FD_SUFFIX; |
| 82 | ParcelFileDescriptor parcel = args.getParcelable(fdName); |
| 83 | if (parcel == null) { |
| 84 | // End of the file list. |
| 85 | break; |
| 86 | } |
| 87 | mFileFds.add(parcel); |
| 88 | String idName = ChildProcessConnection.EXTRA_FILES_PREFIX + i |
| 89 | + ChildProcessConnection.EXTRA_FILES_ID_SUFFIX; |
| 90 | mFileIds.add(args.getInt(idName)); |
| 91 | } |
| 92 | mMainThread.notifyAll(); |
| 93 | } |
| 94 | return Process.myPid(); |
| 95 | } |
| 96 | }; |
| 97 | |
| 98 | /* package */ static Context getContext() { |
| 99 | return sContext.get(); |
| 100 | } |
| 101 | |
| 102 | @Override |
| 103 | public void onCreate() { |
| 104 | Log.i(TAG, "Creating new ChildProcessService pid=" + Process.myPid()); |
| 105 | if (sContext.get() != null) { |
| 106 | Log.e(TAG, "ChildProcessService created again in process!"); |
| 107 | } |
| 108 | sContext.set(this); |
| 109 | super.onCreate(); |
| 110 | |
| 111 | mMainThread = new Thread(new Runnable() { |
| 112 | @Override |
| 113 | public void run() { |
| 114 | try { |
| 115 | try { |
| 116 | LibraryLoader.loadNow(); |
| 117 | } catch (ProcessInitException e) { |
| 118 | Log.e(TAG, "Failed to load native library, exiting child process", e); |
| 119 | return; |
| 120 | } |
| 121 | synchronized (mMainThread) { |
| 122 | while (mCommandLineParams == null) { |
| 123 | mMainThread.wait(); |
| 124 | } |
| 125 | } |
| 126 | LibraryLoader.initialize(mCommandLineParams); |
| 127 | synchronized (mMainThread) { |
| 128 | mLibraryInitialized = true; |
| 129 | mMainThread.notifyAll(); |
| 130 | while (mFileIds == null) { |
| 131 | mMainThread.wait(); |
| 132 | } |
| 133 | } |
| 134 | assert mFileIds.size() == mFileFds.size(); |
| 135 | int[] fileIds = new int[mFileIds.size()]; |
| 136 | int[] fileFds = new int[mFileFds.size()]; |
| 137 | for (int i = 0; i < mFileIds.size(); ++i) { |
| 138 | fileIds[i] = mFileIds.get(i); |
| 139 | fileFds[i] = mFileFds.get(i).detachFd(); |
| 140 | } |
| 141 | ContentMain.initApplicationContext(sContext.get().getApplicationContext()); |
| 142 | nativeInitChildProcess(sContext.get().getApplicationContext(), |
| 143 | ChildProcessService.this, fileIds, fileFds, |
| 144 | mCpuCount, mCpuFeatures); |
| 145 | ContentMain.start(); |
| 146 | nativeExitChildProcess(); |
| 147 | } catch (InterruptedException e) { |
| 148 | Log.w(TAG, MAIN_THREAD_NAME + " startup failed: " + e); |
| 149 | } catch (ProcessInitException e) { |
| 150 | Log.w(TAG, MAIN_THREAD_NAME + " startup failed: " + e); |
| 151 | } |
| 152 | } |
| 153 | }, MAIN_THREAD_NAME); |
| 154 | mMainThread.start(); |
| 155 | } |
| 156 | |
| 157 | @Override |
| 158 | public void onDestroy() { |
| 159 | Log.i(TAG, "Destroying ChildProcessService pid=" + Process.myPid()); |
| 160 | super.onDestroy(); |
| 161 | if (mCommandLineParams == null) { |
| 162 | // This process was destroyed before it even started. Nothing more to do. |
| 163 | return; |
| 164 | } |
| 165 | synchronized (mMainThread) { |
| 166 | try { |
| 167 | while (!mLibraryInitialized) { |
| 168 | // Avoid a potential race in calling through to native code before the library |
| 169 | // has loaded. |
| 170 | mMainThread.wait(); |
| 171 | } |
| 172 | } catch (InterruptedException e) { |
| 173 | } |
| 174 | } |
| 175 | // Try to shutdown the MainThread gracefully, but it might not |
| 176 | // have chance to exit normally. |
| 177 | nativeShutdownMainThread(); |
| 178 | } |
| 179 | |
| 180 | @Override |
| 181 | public IBinder onBind(Intent intent) { |
| 182 | // We call stopSelf() to request that this service be stopped as soon as the client |
| 183 | // unbinds. Otherwise the system may keep it around and available for a reconnect. The |
| 184 | // child processes do not currently support reconnect; they must be initialized from |
| 185 | // scratch every time. |
| 186 | stopSelf(); |
| 187 | |
| 188 | synchronized (mMainThread) { |
| 189 | mCommandLineParams = intent.getStringArrayExtra( |
| 190 | ChildProcessConnection.EXTRA_COMMAND_LINE); |
| 191 | mMainThread.notifyAll(); |
| 192 | } |
| 193 | |
| 194 | return mBinder; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * Called from native code to share a surface texture with another child process. |
| 199 | * Through using the callback object the browser is used as a proxy to route the |
| 200 | * call to the correct process. |
| 201 | * |
| 202 | * @param pid Process handle of the child process to share the SurfaceTexture with. |
| 203 | * @param surfaceObject The Surface or SurfaceTexture to share with the other child process. |
| 204 | * @param primaryID Used to route the call to the correct client instance. |
| 205 | * @param secondaryID Used to route the call to the correct client instance. |
| 206 | */ |
| 207 | @SuppressWarnings("unused") |
| 208 | @CalledByNative |
| 209 | private void establishSurfaceTexturePeer( |
| 210 | int pid, Object surfaceObject, int primaryID, int secondaryID) { |
| 211 | if (mCallback == null) { |
| 212 | Log.e(TAG, "No callback interface has been provided."); |
| 213 | return; |
| 214 | } |
| 215 | |
| 216 | Surface surface = null; |
| 217 | boolean needRelease = false; |
| 218 | if (surfaceObject instanceof Surface) { |
| 219 | surface = (Surface)surfaceObject; |
| 220 | } else if (surfaceObject instanceof SurfaceTexture) { |
| 221 | surface = new Surface((SurfaceTexture)surfaceObject); |
| 222 | needRelease = true; |
| 223 | } else { |
| 224 | Log.e(TAG, "Not a valid surfaceObject: " + surfaceObject); |
| 225 | return; |
| 226 | } |
| 227 | try { |
| 228 | mCallback.establishSurfacePeer(pid, surface, primaryID, secondaryID); |
| 229 | } catch (RemoteException e) { |
| 230 | Log.e(TAG, "Unable to call establishSurfaceTexturePeer: " + e); |
| 231 | return; |
| 232 | } finally { |
| 233 | if (needRelease) { |
| 234 | surface.release(); |
| 235 | } |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | @SuppressWarnings("unused") |
| 240 | @CalledByNative |
| 241 | private Surface getViewSurface(int surfaceId) { |
| 242 | if (mCallback == null) { |
| 243 | Log.e(TAG, "No callback interface has been provided."); |
| 244 | return null; |
| 245 | } |
| 246 | |
| 247 | try { |
| 248 | return mCallback.getViewSurface(surfaceId); |
| 249 | } catch (RemoteException e) { |
| 250 | Log.e(TAG, "Unable to call establishSurfaceTexturePeer: " + e); |
| 251 | return null; |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * The main entry point for a child process. This should be called from a new thread since |
| 257 | * it will not return until the child process exits. See child_process_service.{h,cc} |
| 258 | * |
| 259 | * @param applicationContext The Application Context of the current process. |
| 260 | * @param service The current ChildProcessService object. |
| 261 | * @param fileIds A list of file IDs that should be registered for access by the renderer. |
| 262 | * @param fileFds A list of file descriptors that should be registered for access by the |
| 263 | * renderer. |
| 264 | */ |
| 265 | private static native void nativeInitChildProcess(Context applicationContext, |
| 266 | ChildProcessService service, int[] extraFileIds, int[] extraFileFds, |
| 267 | int cpuCount, long cpuFeatures); |
| 268 | |
| 269 | /** |
| 270 | * Force the child process to exit. |
| 271 | */ |
| 272 | private static native void nativeExitChildProcess(); |
| 273 | |
| 274 | private native void nativeShutdownMainThread(); |
| 275 | } |