OtaDexopt: Downgrade apps when low on space (1920d7b4) · Commits · e / os / android_frameworks_base

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

+57 −8

Original line number	Diff line number	Diff line
		@@ -53,6 +53,10 @@ public class OtaDexoptService extends IOtaDexopt.Stub {
		// The synthetic library dependencies denoting "no checks."
		private final static String[] NO_LIBRARIES = new String[] { "&" };

		// The amount of "available" (free - low threshold) space necessary at the start of an OTA to
		// not bulk-delete unused apps' odex files.
		private final static long BULK_DELETE_THRESHOLD = 1024 * 1024 * 1024; // 1GB.

		private final Context mContext;
		private final PackageManagerService mPackageManagerService;

		@@ -128,6 +132,14 @@ public class OtaDexoptService extends IOtaDexopt.Stub {
		generatePackageDexopts(p, PackageManagerService.REASON_FIRST_BOOT));
		}
		completeSize = mDexoptCommands.size();

		if (getAvailableSpace() < BULK_DELETE_THRESHOLD) {
		Log.i(TAG, "Low on space, deleting oat files in an attempt to free up space: "
		+ PackageManagerServiceUtils.packagesToString(others));
		for (PackageParser.Package pkg : others) {
		deleteOatArtifactsOfPackage(pkg);
		}
		}
		}

		@Override
		@@ -169,28 +181,65 @@ public class OtaDexoptService extends IOtaDexopt.Stub {

		String next = mDexoptCommands.remove(0);

		if (IsFreeSpaceAvailable()) {
		if (getAvailableSpace() > 0) {
		return next;
		} else {
		if (DEBUG_DEXOPT) {
		Log.w(TAG, "Not enough space for OTA dexopt, stopping with "
		+ (mDexoptCommands.size() + 1) + " commands left.");
		}
		mDexoptCommands.clear();
		return "(no free space)";
		}
		}

		/**
		* Check for low space. Returns true if there's space left.
		*/
		private boolean IsFreeSpaceAvailable() {
		// TODO: If apps are not installed in the internal /data partition, we should compare
		// against that storage's free capacity.
		private long getMainLowSpaceThreshold() {
		File dataDir = Environment.getDataDirectory();
		@SuppressWarnings("deprecation")
		long lowThreshold = StorageManager.from(mContext).getStorageLowBytes(dataDir);
		if (lowThreshold == 0) {
		throw new IllegalStateException("Invalid low memory threshold");
		}
		return lowThreshold;
		}

		/**
		* Returns the difference of free space to the low-storage-space threshold. Positive values
		* indicate free bytes.
		*/
		private long getAvailableSpace() {
		// TODO: If apps are not installed in the internal /data partition, we should compare
		// against that storage's free capacity.
		long lowThreshold = getMainLowSpaceThreshold();

		File dataDir = Environment.getDataDirectory();
		long usableSpace = dataDir.getUsableSpace();
		return (usableSpace >= lowThreshold);

		return usableSpace - lowThreshold;
		}

		private static String getOatDir(PackageParser.Package pkg) {
		if (!pkg.canHaveOatDir()) {
		return null;
		}
		File codePath = new File(pkg.codePath);
		if (codePath.isDirectory()) {
		return PackageDexOptimizer.getOatDir(codePath).getAbsolutePath();
		}
		return null;
		}

		private void deleteOatArtifactsOfPackage(PackageParser.Package pkg) {
		String[] instructionSets = getAppDexInstructionSets(pkg.applicationInfo);
		for (String codePath : pkg.getAllCodePaths()) {
		for (String isa : instructionSets) {
		try {
		mPackageManagerService.mInstaller.deleteOdex(codePath, isa, getOatDir(pkg));
		} catch (InstallerException e) {
		Log.e(TAG, "Failed deleting oat files for " + codePath, e);
		}
		}
		}
		}

		/**

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

+13 −17

Original line number	Diff line number	Diff line
		@@ -168,23 +168,8 @@ public class PackageManagerServiceUtils {
		packageManagerService);

		if (DEBUG_DEXOPT) {
		StringBuilder sb = new StringBuilder();
		for (PackageParser.Package pkg : result) {
		if (sb.length() > 0) {
		sb.append(", ");
		}
		sb.append(pkg.packageName);
		}
		Log.i(TAG, "Packages to be dexopted: " + sb.toString());

		sb.setLength(0);
		for (PackageParser.Package pkg : remainingPkgs) {
		if (sb.length() > 0) {
		sb.append(", ");
		}
		sb.append(pkg.packageName);
		}
		Log.i(TAG, "Packages skipped from dexopt: " + sb.toString());
		Log.i(TAG, "Packages to be dexopted: " + packagesToString(result));
		Log.i(TAG, "Packages skipped from dexopt: " + packagesToString(remainingPkgs));
		}

		return result;
		@@ -201,4 +186,15 @@ public class PackageManagerServiceUtils {
		throw ee.rethrowAsIOException();
		}
		}

		public static String packagesToString(Collection<PackageParser.Package> c) {
		StringBuilder sb = new StringBuilder();
		for (PackageParser.Package pkg : c) {
		if (sb.length() > 0) {
		sb.append(", ");
		}
		sb.append(pkg.packageName);
		}
		return sb.toString();
		}
		}