Merge "Populate active apexes cache in a background thread" into qt-dev (f7478d7e) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/pm/ApexManager.java

+109 −55

Original line number	Diff line number	Diff line
		@@ -22,22 +22,21 @@ import android.apex.ApexInfo;
		import android.apex.ApexInfoList;
		import android.apex.ApexSessionInfo;
		import android.apex.IApexService;
		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.pm.PackageInfo;
		import android.content.pm.PackageManager;
		import android.content.pm.PackageParser;
		import android.content.pm.PackageParser.PackageParserException;
		import android.os.HandlerThread;
		import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.ServiceManager.ServiceNotFoundException;
		import android.os.SystemClock;
		import android.sysprop.ApexProperties;
		import android.util.Slog;

		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.util.IndentingPrintWriter;
		import com.android.server.SystemService;

		import java.io.File;
		import java.io.PrintWriter;
		@@ -46,75 +45,108 @@ import java.util.Collection;
		import java.util.Collections;
		import java.util.List;
		import java.util.Map;
		import java.util.concurrent.CountDownLatch;
		import java.util.function.Function;
		import java.util.stream.Collectors;

		/**
		* ApexManager class handles communications with the apex service to perform operation and queries,
		* as well as providing caching to avoid unnecessary calls to the service.
		*
		* @hide
		*/
		class ApexManager {
		static final String TAG = "ApexManager";
		private final IApexService mApexService;
		private final Context mContext;
		private final Object mLock = new Object();
		@GuardedBy("mLock")
		public final class ApexManager extends SystemService {
		private static final String TAG = "ApexManager";
		private IApexService mApexService;

		private final CountDownLatch mActivePackagesCacheLatch = new CountDownLatch(1);
		private Map<String, PackageInfo> mActivePackagesCache;

		ApexManager(Context context) {
		private final CountDownLatch mApexFilesCacheLatch = new CountDownLatch(1);
		private ApexInfo[] mApexFiles;

		public ApexManager(Context context) {
		super(context);
		}

		@Override
		public void onStart() {
		try {
		mApexService = IApexService.Stub.asInterface(
		ServiceManager.getServiceOrThrow("apexservice"));
		} catch (ServiceNotFoundException e) {
		throw new IllegalStateException("Required service apexservice not available");
		}
		mContext = context;
		publishLocalService(ApexManager.class, this);
		HandlerThread oneShotThread = new HandlerThread("ApexManagerOneShotHandler");
		oneShotThread.start();
		oneShotThread.getThreadHandler().post(this::initSequence);
		oneShotThread.quitSafely();
		}

		void systemReady() {
		mContext.registerReceiver(new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
		onBootCompleted();
		mContext.unregisterReceiver(this);
		}
		}, new IntentFilter(Intent.ACTION_BOOT_COMPLETED));
		private void initSequence() {
		populateApexFilesCache();
		parseApexFiles();
		}

		private void populateActivePackagesCacheIfNeeded() {
		synchronized (mLock) {
		if (mActivePackagesCache != null) {
		private void populateApexFilesCache() {
		if (mApexFiles != null) {
		return;
		}
		long startTimeMicros = SystemClock.currentTimeMicro();
		Slog.i(TAG, "Starting to populate apex files cache");
		try {
		mApexFiles = mApexService.getActivePackages();
		Slog.i(TAG, "IPC to apexd finished in " + (SystemClock.currentTimeMicro()
		- startTimeMicros) + " μs");
		} catch (RemoteException re) {
		// TODO: make sure this error is propagated to system server.
		Slog.e(TAG, "Unable to retrieve packages from apexservice: " + re.toString());
		re.rethrowAsRuntimeException();
		}
		mApexFilesCacheLatch.countDown();
		Slog.i(TAG, "Finished populating apex files cache in " + (SystemClock.currentTimeMicro()
		- startTimeMicros) + " μs");
		}

		private void parseApexFiles() {
		waitForLatch(mApexFilesCacheLatch);
		if (mApexFiles == null) {
		throw new IllegalStateException("mApexFiles must be populated");
		}
		long startTimeMicros = SystemClock.currentTimeMicro();
		Slog.i(TAG, "Starting to parse apex files");
		List<PackageInfo> list = new ArrayList<>();
		final ApexInfo[] activePkgs = mApexService.getActivePackages();
		for (ApexInfo ai : activePkgs) {
		// TODO: this can be parallelized.
		for (ApexInfo ai : mApexFiles) {
		try {
		// If the device is using flattened APEX, don't report any APEX
		// packages since they won't be managed or updated by PackageManager.
		if ((new File(ai.packagePath)).isDirectory()) {
		break;
		}
		try {
		list.add(PackageParser.generatePackageInfoFromApex(
		new File(ai.packagePath), PackageManager.GET_META_DATA
		\| PackageManager.GET_SIGNING_CERTIFICATES));
		} catch (PackageParserException pe) {
		// TODO: make sure this error is propagated to system server.
		throw new IllegalStateException("Unable to parse: " + ai, pe);
		}
		}
		mActivePackagesCache = list.stream().collect(
		Collectors.toMap(p -> p.packageName, Function.identity()));
		} catch (RemoteException re) {
		Slog.e(TAG, "Unable to retrieve packages from apexservice: " + re.toString());
		throw new RuntimeException(re);
		}
		}
		mActivePackagesCacheLatch.countDown();
		Slog.i(TAG, "Finished parsing apex files in " + (SystemClock.currentTimeMicro()
		- startTimeMicros) + " μs");
		}

		/**
		* Retrieves information about an active APEX package.
		*
		* <p>This method blocks caller thread until {@link #parseApexFiles()} succeeds. Note that in
		* case {@link #parseApexFiles()}} throws an exception this method will never finish
		* essentially putting device into a boot loop.
		*
		* @param packageName the package name to look for. Note that this is the package name reported
		* in the APK container manifest (i.e. AndroidManifest.xml), which might
		* differ from the one reported in the APEX manifest (i.e.
		@@ -123,30 +155,43 @@ class ApexManager {
		* is not found.
		*/
		@Nullable PackageInfo getActivePackage(String packageName) {
		populateActivePackagesCacheIfNeeded();
		waitForLatch(mActivePackagesCacheLatch);
		return mActivePackagesCache.get(packageName);
		}

		/**
		* Retrieves information about all active APEX packages.
		*
		* <p>This method blocks caller thread until {@link #parseApexFiles()} succeeds. Note that in
		* case {@link #parseApexFiles()}} throws an exception this method will never finish
		* essentially putting device into a boot loop.
		*
		* @return a Collection of PackageInfo object, each one containing information about a different
		* active package.
		*/
		Collection<PackageInfo> getActivePackages() {
		populateActivePackagesCacheIfNeeded();
		waitForLatch(mActivePackagesCacheLatch);
		return mActivePackagesCache.values();
		}

		/**
		* Checks if {@code packageName} is an apex package.
		*
		* <p>This method blocks caller thread until {@link #populateApexFilesCache()} succeeds. Note
		* that in case {@link #populateApexFilesCache()} throws an exception this method will never
		* finish essentially putting device into a boot loop.
		*
		* @param packageName package to check.
		* @return {@code true} if {@code packageName} is an apex package.
		*/
		boolean isApexPackage(String packageName) {
		populateActivePackagesCacheIfNeeded();
		return mActivePackagesCache.containsKey(packageName);
		waitForLatch(mApexFilesCacheLatch);
		for (ApexInfo ai : mApexFiles) {
		if (ai.packageName.equals(packageName)) {
		return true;
		}
		}
		return false;
		}

		/**
		@@ -273,6 +318,19 @@ class ApexManager {
		}
		}

		/**
		* Blocks current thread until {@code latch} has counted down to zero.
		*
		* @throws RuntimeException if thread was interrupted while waiting.
		*/
		private void waitForLatch(CountDownLatch latch) {
		try {
		latch.await();
		} catch (InterruptedException e) {
		throw new RuntimeException("Interrupted waiting for cache to be populated", e);
		}
		}

		/**
		* Dumps various state information to the provided {@link PrintWriter} object.
		*
		@@ -286,7 +344,7 @@ class ApexManager {
		ipw.println("Active APEX packages:");
		ipw.increaseIndent();
		try {
		populateActivePackagesCacheIfNeeded();
		waitForLatch(mActivePackagesCacheLatch);
		for (PackageInfo pi : mActivePackagesCache.values()) {
		if (packageName != null && !packageName.equals(pi.packageName)) {
		continue;
		@@ -331,8 +389,4 @@ class ApexManager {
		ipw.println("Couldn't communicate with apexd.");
		}
		}

		public void onBootCompleted() {
		populateActivePackagesCacheIfNeeded();
		}
		}

services/core/java/com/android/server/pm/PackageManagerService.java

+2 −2

Original line number	Diff line number	Diff line
		@@ -2374,6 +2374,8 @@ public class PackageManagerService extends IPackageManager.Stub

		public PackageManagerService(Context context, Installer installer,
		boolean factoryTest, boolean onlyCore) {
		mApexManager = LocalServices.getService(ApexManager.class);

		LockGuard.installLock(mPackages, LockGuard.INDEX_PACKAGES);
		Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "create package manager");
		EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_PMS_START,
		@@ -2470,7 +2472,6 @@ public class PackageManagerService extends IPackageManager.Stub

		mProtectedPackages = new ProtectedPackages(mContext);

		mApexManager = new ApexManager(context);
		synchronized (mInstallLock) {
		// writer
		synchronized (mPackages) {
		@@ -21462,7 +21463,6 @@ public class PackageManagerService extends IPackageManager.Stub
		storage.registerListener(mStorageListener);

		mInstallerService.systemReady();
		mApexManager.systemReady();
		mPackageDexOptimizer.systemReady();

		getStorageManagerInternal().addExternalStoragePolicy(

services/java/com/android/server/SystemServer.java

+7 −0

Original line number	Diff line number	Diff line
		@@ -115,6 +115,7 @@ import com.android.server.om.OverlayManagerService;
		import com.android.server.os.BugreportManagerService;
		import com.android.server.os.DeviceIdentifiersPolicyService;
		import com.android.server.os.SchedulingPolicyService;
		import com.android.server.pm.ApexManager;
		import com.android.server.pm.BackgroundDexOptService;
		import com.android.server.pm.CrossProfileAppsService;
		import com.android.server.pm.DynamicCodeLoggingService;
		@@ -627,6 +628,12 @@ public final class SystemServer {
		watchdog.start();
		traceEnd();

		// Start ApexManager as early as we can to give it enough time to call apexd and populate
		// cache of known apex packages. Note that calling apexd will happen asynchronously.
		traceBeginAndSlog("StartApexManager");
		mSystemServiceManager.startService(ApexManager.class);
		traceEnd();

		Slog.i(TAG, "Reading configuration...");
		final String TAG_SYSTEM_CONFIG = "ReadingSystemConfig";
		traceBeginAndSlog(TAG_SYSTEM_CONFIG);