| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.content.app; |
| |
| import android.app.Service; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.graphics.SurfaceTexture; |
| import android.os.Bundle; |
| import android.os.IBinder; |
| import android.os.ParcelFileDescriptor; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.util.Log; |
| import android.view.Surface; |
| |
| import org.chromium.base.CalledByNative; |
| import org.chromium.base.JNINamespace; |
| import org.chromium.content.browser.ChildProcessConnection; |
| import org.chromium.content.common.IChildProcessCallback; |
| import org.chromium.content.common.IChildProcessService; |
| import org.chromium.content.browser.ChildProcessLauncher; |
| import org.chromium.content.common.ProcessInitException; |
| |
| import java.util.ArrayList; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| /** |
| * This is the base class for child services; the [Non]SandboxedProcessService0, 1.. etc |
| * subclasses provide the concrete service entry points, to enable the browser to connect |
| * to more than one distinct process (i.e. one process per service number, up to limit of N). |
| * The embedding application must declare these service instances in the application section |
| * of its AndroidManifest.xml, for example with N entries of the form:- |
| * <service android:name="org.chromium.content.app.[Non]SandboxedProcessServiceX" |
| * android:process=":[non]sandboxed_processX" /> |
| * for X in 0...N-1 (where N is {@link ChildProcessLauncher#MAX_REGISTERED_SERVICES}) |
| */ |
| @JNINamespace("content") |
| public class ChildProcessService extends Service { |
| private static final String MAIN_THREAD_NAME = "ChildProcessMain"; |
| private static final String TAG = "ChildProcessService"; |
| private IChildProcessCallback mCallback; |
| |
| // This is the native "Main" thread for the renderer / utility process. |
| private Thread mMainThread; |
| // Parameters received via IPC, only accessed while holding the mMainThread monitor. |
| private String[] mCommandLineParams; |
| private int mCpuCount; |
| private long mCpuFeatures; |
| // Pairs IDs and file descriptors that should be registered natively. |
| private ArrayList<Integer> mFileIds; |
| private ArrayList<ParcelFileDescriptor> mFileFds; |
| // Linker-specific parameters for this child process service. |
| private LinkerParams mLinkerParams; |
| |
| private static AtomicReference<Context> sContext = new AtomicReference<Context>(null); |
| private boolean mLibraryInitialized = false; |
| // Becomes true once the service is bound. Access must synchronize around mMainThread. |
| private boolean mIsBound = false; |
| |
| // Binder object used by clients for this service. |
| private final IChildProcessService.Stub mBinder = new IChildProcessService.Stub() { |
| // NOTE: Implement any IChildProcessService methods here. |
| @Override |
| public int setupConnection(Bundle args, IChildProcessCallback callback) { |
| mCallback = callback; |
| synchronized (mMainThread) { |
| // Allow the command line to be set via bind() intent or setupConnection, but |
| // the FD can only be transferred here. |
| if (mCommandLineParams == null) { |
| mCommandLineParams = args.getStringArray( |
| ChildProcessConnection.EXTRA_COMMAND_LINE); |
| } |
| // We must have received the command line by now |
| assert mCommandLineParams != null; |
| mCpuCount = args.getInt(ChildProcessConnection.EXTRA_CPU_COUNT); |
| mCpuFeatures = args.getLong(ChildProcessConnection.EXTRA_CPU_FEATURES); |
| assert mCpuCount > 0; |
| mFileIds = new ArrayList<Integer>(); |
| mFileFds = new ArrayList<ParcelFileDescriptor>(); |
| for (int i = 0;; i++) { |
| String fdName = ChildProcessConnection.EXTRA_FILES_PREFIX + i |
| + ChildProcessConnection.EXTRA_FILES_FD_SUFFIX; |
| ParcelFileDescriptor parcel = args.getParcelable(fdName); |
| if (parcel == null) { |
| // End of the file list. |
| break; |
| } |
| mFileFds.add(parcel); |
| String idName = ChildProcessConnection.EXTRA_FILES_PREFIX + i |
| + ChildProcessConnection.EXTRA_FILES_ID_SUFFIX; |
| mFileIds.add(args.getInt(idName)); |
| } |
| Bundle sharedRelros = args.getBundle(Linker.EXTRA_LINKER_SHARED_RELROS); |
| if (sharedRelros != null) { |
| Linker.useSharedRelros(sharedRelros); |
| sharedRelros = null; |
| } |
| mMainThread.notifyAll(); |
| } |
| return Process.myPid(); |
| } |
| }; |
| |
| /* package */ static Context getContext() { |
| return sContext.get(); |
| } |
| |
| @Override |
| public void onCreate() { |
| Log.i(TAG, "Creating new ChildProcessService pid=" + Process.myPid()); |
| if (sContext.get() != null) { |
| Log.e(TAG, "ChildProcessService created again in process!"); |
| } |
| sContext.set(this); |
| super.onCreate(); |
| |
| mMainThread = new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| boolean useLinker = Linker.isUsed(); |
| |
| if (useLinker) { |
| synchronized (mMainThread) { |
| while (!mIsBound) |
| mMainThread.wait(); |
| } |
| if (mLinkerParams != null) { |
| if (mLinkerParams.mWaitForSharedRelro) |
| Linker.initServiceProcess(mLinkerParams.mBaseLoadAddress); |
| else |
| Linker.disableSharedRelros(); |
| |
| Linker.setTestRunnerClassName(mLinkerParams.mTestRunnerClassName); |
| } |
| } |
| try { |
| LibraryLoader.loadNow(); |
| } catch (ProcessInitException e) { |
| Log.e(TAG, "Failed to load native library, exiting child process", e); |
| return; |
| } |
| synchronized (mMainThread) { |
| while (mCommandLineParams == null) { |
| mMainThread.wait(); |
| } |
| } |
| LibraryLoader.initialize(mCommandLineParams); |
| synchronized (mMainThread) { |
| mLibraryInitialized = true; |
| mMainThread.notifyAll(); |
| while (mFileIds == null) { |
| mMainThread.wait(); |
| } |
| } |
| assert mFileIds.size() == mFileFds.size(); |
| int[] fileIds = new int[mFileIds.size()]; |
| int[] fileFds = new int[mFileFds.size()]; |
| for (int i = 0; i < mFileIds.size(); ++i) { |
| fileIds[i] = mFileIds.get(i); |
| fileFds[i] = mFileFds.get(i).detachFd(); |
| } |
| ContentMain.initApplicationContext(sContext.get().getApplicationContext()); |
| nativeInitChildProcess(sContext.get().getApplicationContext(), |
| ChildProcessService.this, fileIds, fileFds, |
| mCpuCount, mCpuFeatures); |
| ContentMain.start(); |
| nativeExitChildProcess(); |
| } catch (InterruptedException e) { |
| Log.w(TAG, MAIN_THREAD_NAME + " startup failed: " + e); |
| } catch (ProcessInitException e) { |
| Log.w(TAG, MAIN_THREAD_NAME + " startup failed: " + e); |
| } |
| } |
| }, MAIN_THREAD_NAME); |
| mMainThread.start(); |
| } |
| |
| @Override |
| public void onDestroy() { |
| Log.i(TAG, "Destroying ChildProcessService pid=" + Process.myPid()); |
| super.onDestroy(); |
| if (mCommandLineParams == null) { |
| // This process was destroyed before it even started. Nothing more to do. |
| return; |
| } |
| synchronized (mMainThread) { |
| try { |
| while (!mLibraryInitialized) { |
| // Avoid a potential race in calling through to native code before the library |
| // has loaded. |
| mMainThread.wait(); |
| } |
| } catch (InterruptedException e) { |
| } |
| } |
| // Try to shutdown the MainThread gracefully, but it might not |
| // have chance to exit normally. |
| nativeShutdownMainThread(); |
| } |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| // We call stopSelf() to request that this service be stopped as soon as the client |
| // unbinds. Otherwise the system may keep it around and available for a reconnect. The |
| // child processes do not currently support reconnect; they must be initialized from |
| // scratch every time. |
| stopSelf(); |
| |
| synchronized (mMainThread) { |
| mCommandLineParams = intent.getStringArrayExtra( |
| ChildProcessConnection.EXTRA_COMMAND_LINE); |
| mLinkerParams = null; |
| if (Linker.isUsed()) |
| mLinkerParams = new LinkerParams(intent); |
| mIsBound = true; |
| mMainThread.notifyAll(); |
| } |
| |
| return mBinder; |
| } |
| |
| /** |
| * Called from native code to share a surface texture with another child process. |
| * Through using the callback object the browser is used as a proxy to route the |
| * call to the correct process. |
| * |
| * @param pid Process handle of the child process to share the SurfaceTexture with. |
| * @param surfaceObject The Surface or SurfaceTexture to share with the other child process. |
| * @param primaryID Used to route the call to the correct client instance. |
| * @param secondaryID Used to route the call to the correct client instance. |
| */ |
| @SuppressWarnings("unused") |
| @CalledByNative |
| private void establishSurfaceTexturePeer( |
| int pid, Object surfaceObject, int primaryID, int secondaryID) { |
| if (mCallback == null) { |
| Log.e(TAG, "No callback interface has been provided."); |
| return; |
| } |
| |
| Surface surface = null; |
| boolean needRelease = false; |
| if (surfaceObject instanceof Surface) { |
| surface = (Surface)surfaceObject; |
| } else if (surfaceObject instanceof SurfaceTexture) { |
| surface = new Surface((SurfaceTexture)surfaceObject); |
| needRelease = true; |
| } else { |
| Log.e(TAG, "Not a valid surfaceObject: " + surfaceObject); |
| return; |
| } |
| try { |
| mCallback.establishSurfacePeer(pid, surface, primaryID, secondaryID); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Unable to call establishSurfaceTexturePeer: " + e); |
| return; |
| } finally { |
| if (needRelease) { |
| surface.release(); |
| } |
| } |
| } |
| |
| @SuppressWarnings("unused") |
| @CalledByNative |
| private Surface getViewSurface(int surfaceId) { |
| if (mCallback == null) { |
| Log.e(TAG, "No callback interface has been provided."); |
| return null; |
| } |
| |
| try { |
| return mCallback.getViewSurface(surfaceId); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Unable to call establishSurfaceTexturePeer: " + e); |
| return null; |
| } |
| } |
| |
| /** |
| * The main entry point for a child process. This should be called from a new thread since |
| * it will not return until the child process exits. See child_process_service.{h,cc} |
| * |
| * @param applicationContext The Application Context of the current process. |
| * @param service The current ChildProcessService object. |
| * @param fileIds A list of file IDs that should be registered for access by the renderer. |
| * @param fileFds A list of file descriptors that should be registered for access by the |
| * renderer. |
| */ |
| private static native void nativeInitChildProcess(Context applicationContext, |
| ChildProcessService service, int[] extraFileIds, int[] extraFileFds, |
| int cpuCount, long cpuFeatures); |
| |
| /** |
| * Force the child process to exit. |
| */ |
| private static native void nativeExitChildProcess(); |
| |
| private native void nativeShutdownMainThread(); |
| } |