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Commit 7cf271ec authored by Alex Buynytskyy's avatar Alex Buynytskyy Committed by Automerger Merge Worker
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Merge "Reduce lock contention on setting write." into tm-dev am: e06f5b1a am: 0ca9d4e3 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17838378



Change-Id: I11a18d8a16ac8095c17a7bcb8df68fc5b068b5df
Ignore-AOSP-First: this is an automerge
Signed-off-by: default avatarAutomerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
parents e022e3e2 0ca9d4e3

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

+1 −1
Original line number Diff line number Diff line
@@ -1430,7 +1430,7 @@ public class PackageManagerService implements PackageSender, TestUtilityService 
                (i, pm) -> new Settings(Environment.getDataDirectory(),

                        RuntimePermissionsPersistence.createInstance(),

                        i.getPermissionManagerServiceInternal(),

                        domainVerificationService, lock),

                        domainVerificationService, backgroundHandler, lock),

                (i, pm) -> AppsFilterImpl.create(i,

                        i.getLocalService(PackageManagerInternal.class)),

                (i, pm) -> (PlatformCompat) ServiceManager.getService("platform_compat"),

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

+120 −61
Original line number Diff line number Diff line
@@ -360,6 +360,8 @@ public final class Settings implements Watchable, Snappable { 
    private static final String ATTR_VALUE = "value";

    private static final String ATTR_FIRST_INSTALL_TIME = "first-install-time";



    private final Handler mHandler;



    private final PackageManagerTracedLock mLock;



    @Watched(manual = true)
@@ -583,6 +585,8 @@ public final class Settings implements Watchable, Snappable { 
                                         "Settings.mInstallerPackages");

        mKeySetManagerService = new KeySetManagerService(mPackages);



        // Test-only handler working on background thread.

        mHandler = new Handler(BackgroundThread.getHandler().getLooper());

        mLock = new PackageManagerTracedLock();

        mPackages.putAll(pkgSettings);

        mAppIds = new AppIdSettingMap();
@@ -607,6 +611,7 @@ public final class Settings implements Watchable, Snappable { 
    Settings(File dataDir, RuntimePermissionsPersistence runtimePermissionsPersistence,

            LegacyPermissionDataProvider permissionDataProvider,

            @NonNull DomainVerificationManagerInternal domainVerificationManager,

            @NonNull Handler handler,

            @NonNull PackageManagerTracedLock lock)  {

        mPackages = new WatchedArrayMap<>();

        mPackagesSnapshot  =
@@ -620,6 +625,7 @@ public final class Settings implements Watchable, Snappable { 
                                         "Settings.mInstallerPackages");

        mKeySetManagerService = new KeySetManagerService(mPackages);



        mHandler = handler;

        mLock = lock;

        mAppIds = new AppIdSettingMap();

        mPermissions = new LegacyPermissionSettings(lock);
@@ -627,10 +633,8 @@ public final class Settings implements Watchable, Snappable { 
                runtimePermissionsPersistence, new Consumer<Integer>() {

            @Override

            public void accept(Integer userId) {

                synchronized (mLock) {

                    mRuntimePermissionsPersistence.writeStateForUserSync(userId,

                            mPermissionDataProvider, mPackages, mSharedUsers);

                }

                mRuntimePermissionsPersistence.writeStateForUser(userId,

                        mPermissionDataProvider, mPackages, mSharedUsers, mHandler, mLock);

            }

        });

        mPermissionDataProvider = permissionDataProvider;
@@ -679,6 +683,7 @@ public final class Settings implements Watchable, Snappable { 
        // needed by the read-only methods.  Note especially that the lock

        // is not required because this clone is meant to support lock-free

        // read-only methods.

        mHandler = null;

        mLock = null;

        mRuntimePermissionsPersistence = r.mRuntimePermissionsPersistence;

        mSettingsFilename = null;
@@ -5286,8 +5291,8 @@ public final class Settings implements Watchable, Snappable { 


    public void writePermissionStateForUserLPr(int userId, boolean sync) {

        if (sync) {

            mRuntimePermissionsPersistence.writeStateForUserSync(userId, mPermissionDataProvider,

                    mPackages, mSharedUsers);

            mRuntimePermissionsPersistence.writeStateForUser(userId, mPermissionDataProvider,

                    mPackages, mSharedUsers, /*handler=*/null, mLock);

        } else {

            mRuntimePermissionsPersistence.writeStateForUserAsync(userId);

        }
@@ -5373,9 +5378,14 @@ public final class Settings implements Watchable, Snappable { 


        private String mExtendedFingerprint;



        @GuardedBy("mPersistenceLock")

        private final RuntimePermissionsPersistence mPersistence;

        private final Object mPersistenceLock = new Object();



        private final Handler mHandler = new MyHandler();

        // Low-priority handlers running on SystemBg thread.

        private final Handler mAsyncHandler = new MyHandler();

        private final Handler mPersistenceHandler = new Handler(

                BackgroundThread.getHandler().getLooper());



        private final Object mLock = new Object();
@@ -5398,6 +5408,11 @@ public final class Settings implements Watchable, Snappable { 
        // The mapping keys are user ids.

        private final SparseBooleanArray mPermissionUpgradeNeeded = new SparseBooleanArray();



        @GuardedBy("mLock")

        // Staging area for states prepared to be written.

        private final SparseArray<RuntimePermissionsState> mPendingStatesToWrite =

                new SparseArray<>();



        // This is a hack to allow this class to invoke a write using Settings's data structures,

        // to facilitate moving to a finer scoped lock without a significant refactor.

        private final Consumer<Integer> mInvokeWriteUserStateAsyncCallback;
@@ -5462,7 +5477,7 @@ public final class Settings implements Watchable, Snappable { 
                final long currentTimeMillis = SystemClock.uptimeMillis();



                if (mWriteScheduled.get(userId)) {

                    mHandler.removeMessages(userId);

                    mAsyncHandler.removeMessages(userId);



                    // If enough time passed, write without holding off anymore.

                    final long lastNotWrittenMutationTimeMillis = mLastNotWrittenMutationTimesMillis
@@ -5471,7 +5486,7 @@ public final class Settings implements Watchable, Snappable { 
                            - lastNotWrittenMutationTimeMillis;

                    if (timeSinceLastNotWrittenMutationMillis

                            >= MAX_WRITE_PERMISSIONS_DELAY_MILLIS) {

                        mHandler.obtainMessage(userId).sendToTarget();

                        mAsyncHandler.obtainMessage(userId).sendToTarget();

                        return;

                    }
@@ -5481,30 +5496,36 @@ public final class Settings implements Watchable, Snappable { 
                    final long writeDelayMillis = Math.min(WRITE_PERMISSIONS_DELAY_MILLIS,

                            maxDelayMillis);



                    Message message = mHandler.obtainMessage(userId);

                    mHandler.sendMessageDelayed(message, writeDelayMillis);

                    Message message = mAsyncHandler.obtainMessage(userId);

                    mAsyncHandler.sendMessageDelayed(message, writeDelayMillis);

                } else {

                    mLastNotWrittenMutationTimesMillis.put(userId, currentTimeMillis);

                    Message message = mHandler.obtainMessage(userId);

                    mHandler.sendMessageDelayed(message, WRITE_PERMISSIONS_DELAY_MILLIS);

                    Message message = mAsyncHandler.obtainMessage(userId);

                    mAsyncHandler.sendMessageDelayed(message, WRITE_PERMISSIONS_DELAY_MILLIS);

                    mWriteScheduled.put(userId, true);

                }

            }

        }



        public void writeStateForUserSync(int userId, @NonNull LegacyPermissionDataProvider

        public void writeStateForUser(int userId, @NonNull LegacyPermissionDataProvider

                legacyPermissionDataProvider,

                @NonNull WatchedArrayMap<String, ? extends PackageStateInternal> packageStates,

                @NonNull WatchedArrayMap<String, SharedUserSetting> sharedUsers) {

                @NonNull WatchedArrayMap<String, SharedUserSetting> sharedUsers,

                @Nullable Handler pmHandler, @NonNull Object pmLock) {

            final int version;

            final String fingerprint;

            synchronized (mLock) {

                mHandler.removeMessages(userId);

                mAsyncHandler.removeMessages(userId);

                mWriteScheduled.delete(userId);



                legacyPermissionDataProvider.writeLegacyPermissionStateTEMP();



                int version = mVersions.get(userId, INITIAL_VERSION);

                version = mVersions.get(userId, INITIAL_VERSION);

                fingerprint = mFingerprints.get(userId);

            }



                String fingerprint = mFingerprints.get(userId);

            Runnable writer = () -> {

                final RuntimePermissionsState runtimePermissions;

                synchronized (pmLock) {

                    legacyPermissionDataProvider.writeLegacyPermissionStateTEMP();



                    Map<String, List<RuntimePermissionsState.PermissionState>> packagePermissions =

                            new ArrayMap<>();
@@ -5516,17 +5537,19 @@ public final class Settings implements Watchable, Snappable { 
                            List<RuntimePermissionsState.PermissionState> permissions =

                                    getPermissionsFromPermissionsState(

                                            packageState.getLegacyPermissionState(), userId);

                        if (permissions.isEmpty() && !packageState.isInstallPermissionsFixed()) {

                            // Storing an empty state means the package is known to the system and

                            // its install permissions have been granted and fixed. If this is not

                            // the case, we should not store anything.

                            if (permissions.isEmpty()

                                    && !packageState.isInstallPermissionsFixed()) {

                                // Storing an empty state means the package is known to the

                                // system and its install permissions have been granted and fixed.

                                // If this is not the case, we should not store anything.

                                continue;

                            }

                            packagePermissions.put(packageName, permissions);

                        }

                    }



                Map<String, List<RuntimePermissionsState.PermissionState>> sharedUserPermissions =

                    Map<String, List<RuntimePermissionsState.PermissionState>>

                            sharedUserPermissions =

                            new ArrayMap<>();

                    final int sharedUsersSize = sharedUsers.size();

                    for (int i = 0; i < sharedUsersSize; i++) {
@@ -5538,12 +5561,47 @@ public final class Settings implements Watchable, Snappable { 
                        sharedUserPermissions.put(sharedUserName, permissions);

                    }



                RuntimePermissionsState runtimePermissions = new RuntimePermissionsState(version,

                    runtimePermissions = new RuntimePermissionsState(version,

                            fingerprint, packagePermissions, sharedUserPermissions);

                }

                synchronized (mLock) {

                    mPendingStatesToWrite.put(userId, runtimePermissions);

                }

                if (pmHandler != null) {

                    // Async version.

                    mPersistenceHandler.post(() -> writePendingStates());

                } else {

                    // Sync version.

                    writePendingStates();

                }

            };



            if (pmHandler != null) {

                // Async version, use pmHandler.

                pmHandler.post(writer);

            } else {

                // Sync version, use caller's thread.

                writer.run();

            }

        }



        private void writePendingStates() {

            while (true) {

                final RuntimePermissionsState runtimePermissions;

                final int userId;

                synchronized (mLock) {

                    if (mPendingStatesToWrite.size() == 0) {

                        break;

                    }

                    userId = mPendingStatesToWrite.keyAt(0);

                    runtimePermissions = mPendingStatesToWrite.valueAt(0);

                    mPendingStatesToWrite.removeAt(0);

                }

                synchronized (mPersistenceLock) {

                    mPersistence.writeForUser(runtimePermissions, UserHandle.of(userId));

                }

            }

        }



        @NonNull

        private List<RuntimePermissionsState.PermissionState> getPermissionsFromPermissionsState(
@@ -5563,7 +5621,7 @@ public final class Settings implements Watchable, Snappable { 
        private void onUserRemoved(int userId) {

            synchronized (mLock) {

                // Make sure we do not

                mHandler.removeMessages(userId);

                mAsyncHandler.removeMessages(userId);



                mPermissionUpgradeNeeded.delete(userId);

                mVersions.delete(userId);
@@ -5572,7 +5630,7 @@ public final class Settings implements Watchable, Snappable { 
        }



        public void deleteUserRuntimePermissionsFile(int userId) {

            synchronized (mLock) {

            synchronized (mPersistenceLock) {

                mPersistence.deleteForUser(UserHandle.of(userId));

            }

        }
@@ -5581,16 +5639,17 @@ public final class Settings implements Watchable, Snappable { 
                @NonNull WatchedArrayMap<String, PackageSetting> packageSettings,

                @NonNull WatchedArrayMap<String, SharedUserSetting> sharedUsers,

                @NonNull File userRuntimePermissionsFile) {

            synchronized (mLock) {

                RuntimePermissionsState runtimePermissions = mPersistence.readForUser(UserHandle.of(

                        userId));

            final RuntimePermissionsState runtimePermissions;

            synchronized (mPersistenceLock) {

                runtimePermissions = mPersistence.readForUser(UserHandle.of(userId));

            }

            if (runtimePermissions == null) {

                readLegacyStateForUserSync(userId, userRuntimePermissionsFile, packageSettings,

                        sharedUsers);

                writeStateForUserAsync(userId);

                return;

            }



            synchronized (mLock) {

                // If the runtime permissions file exists but the version is not set this is

                // an upgrade from P->Q. Hence mark it with the special UPGRADE_VERSION.

                int version = runtimePermissions.getVersion();

services/tests/servicestests/src/com/android/server/pm/PackageManagerSettingsTests.java

+1 −1
Original line number Diff line number Diff line
@@ -1516,7 +1516,7 @@ public class PackageManagerSettingsTests { 
    private Settings makeSettings() {

        return new Settings(InstrumentationRegistry.getContext().getFilesDir(),

                mRuntimePermissionsPersistence, mPermissionDataProvider,

                mDomainVerificationManager, new PackageManagerTracedLock());

                mDomainVerificationManager, null, new PackageManagerTracedLock());

    }



    private void verifyKeySetMetaData(Settings settings)