Component Alias initial (rudimentary) prototype (fc007928) · Commits · e / os / android_frameworks_base

core/java/android/content/Intent.java

+39 −0

Original line number	Diff line number	Diff line
		@@ -6993,6 +6993,7 @@ public class Intent implements Parcelable, Cloneable {
		private int mContentUserHint = UserHandle.USER_CURRENT;
		/** Token to track instant app launches. Local only; do not copy cross-process. */
		private String mLaunchToken;
		private Intent mOriginalIntent; // Used for the experimental "component alias" feature.

		// ---------------------------------------------------------------------

		@@ -7029,6 +7030,7 @@ public class Intent implements Parcelable, Cloneable {
		this.mIdentifier = o.mIdentifier;
		this.mPackage = o.mPackage;
		this.mComponent = o.mComponent;
		this.mOriginalIntent = o.mOriginalIntent;

		if (o.mCategories != null) {
		this.mCategories = new ArraySet<>(o.mCategories);
		@@ -8193,6 +8195,22 @@ public class Intent implements Parcelable, Cloneable {
		return mType;
		}


		/**
		* @hide For the experimental component alias feature. Do not use, unless you know what it is.
		*/
		@Nullable
		public Intent getOriginalIntent() {
		return mOriginalIntent;
		}

		/**
		* @hide For the experimental component alias feature. Do not use, unless you know what it is.
		*/
		public void setOriginalIntent(@Nullable Intent originalIntent) {
		mOriginalIntent = originalIntent;
		}

		/**
		* Return the MIME data type of this intent. If the type field is
		* explicitly set, that is simply returned. Otherwise, if the data is set,
		@@ -10838,6 +10856,11 @@ public class Intent implements Parcelable, Cloneable {
		mSelector.toShortString(b, secure, comp, extras, clip);
		b.append("}");
		}
		if (mOriginalIntent != null) {
		b.append(" org={");
		mOriginalIntent.toShortString(b, secure, comp, extras, clip);
		b.append("}");
		}
		}

		/** @hide */
		@@ -11133,6 +11156,13 @@ public class Intent implements Parcelable, Cloneable {
		}
		out.writeInt(mContentUserHint);
		out.writeBundle(mExtras);

		if (mOriginalIntent != null) {
		out.writeInt(1);
		mOriginalIntent.writeToParcel(out, flags);
		} else {
		out.writeInt(0);
		}
		}

		public static final @android.annotation.NonNull Parcelable.Creator<Intent> CREATOR
		@@ -11186,6 +11216,9 @@ public class Intent implements Parcelable, Cloneable {
		}
		mContentUserHint = in.readInt();
		mExtras = in.readBundle();
		if (in.readInt() != 0) {
		mOriginalIntent = new Intent(in);
		}
		}

		/**
		@@ -11410,6 +11443,9 @@ public class Intent implements Parcelable, Cloneable {
		if (mClipData != null) {
		mClipData.prepareToLeaveProcess(leavingPackage, getFlags());
		}
		if (mOriginalIntent != null) {
		mOriginalIntent.prepareToLeaveProcess(leavingPackage);
		}

		if (mExtras != null && !mExtras.isParcelled()) {
		final Object intent = mExtras.get(Intent.EXTRA_INTENT);
		@@ -11505,6 +11541,9 @@ public class Intent implements Parcelable, Cloneable {
		if (mClipData != null) {
		mClipData.prepareToEnterProcess(source);
		}
		if (mOriginalIntent != null) {
		mOriginalIntent.prepareToEnterProcess(false, source);
		}

		if (mContentUserHint != UserHandle.USER_CURRENT) {
		if (UserHandle.getAppId(Process.myUid()) != Process.SYSTEM_UID) {

services/core/java/com/android/server/am/ActiveServices.java

+55 −12

Original line number	Diff line number	Diff line
		@@ -816,8 +816,19 @@ public final class ActiveServices {
		return null;
		}

		return startServiceInnerLocked(r, service, callingUid, callingPid, fgRequired, callerFg,
		// If what the client try to start/connect was an alias, then we need to return the
		// alias component name to the client, not the "target" component name, which is
		// what realResult contains.
		final ComponentName realResult =
		startServiceInnerLocked(r, service, callingUid, callingPid, fgRequired, callerFg,
		allowBackgroundActivityStarts, backgroundActivityStartsToken);
		if (res.aliasComponent != null
		&& !realResult.getPackageName().startsWith("!")
		&& !realResult.getPackageName().startsWith("?")) {
		return res.aliasComponent;
		} else {
		return realResult;
		}
		}

		private ComponentName startServiceInnerLocked(ServiceRecord r, Intent service,
		@@ -2838,7 +2849,7 @@ public final class ActiveServices {
		AppBindRecord b = s.retrieveAppBindingLocked(service, callerApp);
		ConnectionRecord c = new ConnectionRecord(b, activity,
		connection, flags, clientLabel, clientIntent,
		callerApp.uid, callerApp.processName, callingPackage);
		callerApp.uid, callerApp.processName, callingPackage, res.aliasComponent);

		IBinder binder = connection.asBinder();
		s.addConnection(binder, c);
		@@ -2915,8 +2926,13 @@ public final class ActiveServices {
		if (s.app != null && b.intent.received) {
		// Service is already running, so we can immediately
		// publish the connection.

		// If what the client try to start/connect was an alias, then we need to
		// pass the alias component name instead to the client.
		final ComponentName clientSideComponentName =
		res.aliasComponent != null ? res.aliasComponent : s.name;
		try {
		c.conn.connected(s.name, b.intent.binder, false);
		c.conn.connected(clientSideComponentName, b.intent.binder, false);
		} catch (Exception e) {
		Slog.w(TAG, "Failure sending service " + s.shortInstanceName
		+ " to connection " + c.conn.asBinder()
		@@ -2987,8 +3003,12 @@ public final class ActiveServices {
		continue;
		}
		if (DEBUG_SERVICE) Slog.v(TAG_SERVICE, "Publishing to: " + c);
		// If what the client try to start/connect was an alias, then we need to
		// pass the alias component name instead to the client.
		final ComponentName clientSideComponentName =
		c.aliasComponent != null ? c.aliasComponent : r.name;
		try {
		c.conn.connected(r.name, service, false);
		c.conn.connected(clientSideComponentName, service, false);
		} catch (Exception e) {
		Slog.w(TAG, "Failure sending service " + r.shortInstanceName
		+ " to connection " + c.conn.asBinder()
		@@ -3140,9 +3160,22 @@ public final class ActiveServices {
		final ServiceRecord record;
		final String permission;

		ServiceLookupResult(ServiceRecord _record, String _permission) {
		/**
		* Set only when we looked up to this service via an alias. Otherwise, it's null.
		*/
		@Nullable
		final ComponentName aliasComponent;

		ServiceLookupResult(ServiceRecord _record, ComponentName _aliasComponent) {
		record = _record;
		permission = null;
		aliasComponent = _aliasComponent;
		}

		ServiceLookupResult(String _permission) {
		record = null;
		permission = _permission;
		aliasComponent = null;
		}
		}

		@@ -3174,10 +3207,19 @@ public final class ActiveServices {
		/* name= */ "service", callingPackage);

		ServiceMap smap = getServiceMapLocked(userId);

		// See if the intent refers to an alias. If so, update the intent with the target component
		// name. `resolution` will contain the alias component name, which we need to return
		// to the client.
		final ComponentAliasResolver.Resolution resolution =
		mAm.mComponentAliasResolver.resolveService(service, resolvedType,
		/* match flags */ 0, userId, callingUid);

		final ComponentName comp;
		if (instanceName == null) {
		comp = service.getComponent();
		} else {
		// This is for isolated services
		final ComponentName realComp = service.getComponent();
		if (realComp == null) {
		throw new IllegalArgumentException("Can't use custom instance name '" + instanceName
		@@ -3186,6 +3228,7 @@ public final class ActiveServices {
		comp = new ComponentName(realComp.getPackageName(),
		realComp.getClassName() + ":" + instanceName);
		}

		if (comp != null) {
		r = smap.mServicesByInstanceName.get(comp);
		if (DEBUG_SERVICE && r != null) Slog.v(TAG_SERVICE, "Retrieved by component: " + r);
		@@ -3243,7 +3286,7 @@ public final class ActiveServices {
		String msg = "association not allowed between packages "
		+ callingPackage + " and " + name.getPackageName();
		Slog.w(TAG, "Service lookup failed: " + msg);
		return new ServiceLookupResult(null, msg);
		return new ServiceLookupResult(msg);
		}

		// Store the defining packageName and uid, as they might be changed in
		@@ -3361,11 +3404,11 @@ public final class ActiveServices {
		String msg = "association not allowed between packages "
		+ callingPackage + " and " + r.packageName;
		Slog.w(TAG, "Service lookup failed: " + msg);
		return new ServiceLookupResult(null, msg);
		return new ServiceLookupResult(msg);
		}
		if (!mAm.mIntentFirewall.checkService(r.name, service, callingUid, callingPid,
		resolvedType, r.appInfo)) {
		return new ServiceLookupResult(null, "blocked by firewall");
		return new ServiceLookupResult("blocked by firewall");
		}
		if (mAm.checkComponentPermission(r.permission,
		callingPid, callingUid, r.appInfo.uid, r.exported) != PERMISSION_GRANTED) {
		@@ -3374,14 +3417,14 @@ public final class ActiveServices {
		+ " from pid=" + callingPid
		+ ", uid=" + callingUid
		+ " that is not exported from uid " + r.appInfo.uid);
		return new ServiceLookupResult(null, "not exported from uid "
		return new ServiceLookupResult("not exported from uid "
		+ r.appInfo.uid);
		}
		Slog.w(TAG, "Permission Denial: Accessing service " + r.shortInstanceName
		+ " from pid=" + callingPid
		+ ", uid=" + callingUid
		+ " requires " + r.permission);
		return new ServiceLookupResult(null, r.permission);
		return new ServiceLookupResult(r.permission);
		} else if (Manifest.permission.BIND_HOTWORD_DETECTION_SERVICE.equals(r.permission)
		&& callingUid != Process.SYSTEM_UID) {
		// Hotword detection must run in its own sandbox, and we don't even trust
		@@ -3392,7 +3435,7 @@ public final class ActiveServices {
		+ ", uid=" + callingUid
		+ " requiring permission " + r.permission
		+ " can only be bound to from the system.");
		return new ServiceLookupResult(null, "can only be bound to "
		return new ServiceLookupResult("can only be bound to "
		+ "by the system.");
		} else if (r.permission != null && callingPackage != null) {
		final int opCode = AppOpsManager.permissionToOpCode(r.permission);
		@@ -3405,7 +3448,7 @@ public final class ActiveServices {
		return null;
		}
		}
		return new ServiceLookupResult(r, null);
		return new ServiceLookupResult(r, resolution.getAliasComponent());
		}
		return null;
		}

services/core/java/com/android/server/am/ActivityManagerConstants.java

+32 −0

Original line number	Diff line number	Diff line
		@@ -123,6 +123,8 @@ final class ActivityManagerConstants extends ContentObserver {
		static final String KEY_KILL_BG_RESTRICTED_CACHED_IDLE = "kill_bg_restricted_cached_idle";
		static final String KEY_KILL_BG_RESTRICTED_CACHED_IDLE_SETTLE_TIME =
		"kill_bg_restricted_cached_idle_settle_time";
		static final String KEY_ENABLE_COMPONENT_ALIAS = "enable_experimental_component_alias";
		static final String KEY_COMPONENT_ALIAS_OVERRIDES = "component_alias_overrides";

		private static final int DEFAULT_MAX_CACHED_PROCESSES = 32;
		private static final long DEFAULT_FGSERVICE_MIN_SHOWN_TIME = 2*1000;
		@@ -197,6 +199,8 @@ final class ActivityManagerConstants extends ContentObserver {
		* Whether or not to enable the extra delays to service restarts on memory pressure.
		*/
		private static final boolean DEFAULT_ENABLE_EXTRA_SERVICE_RESTART_DELAY_ON_MEM_PRESSURE = true;
		private static final boolean DEFAULT_ENABLE_COMPONENT_ALIAS = false;
		private static final String DEFAULT_COMPONENT_ALIAS_OVERRIDES = "";

		// Flag stored in the DeviceConfig API.
		/**
		@@ -580,6 +584,14 @@ final class ActivityManagerConstants extends ContentObserver {
		@GuardedBy("mService")
		boolean mEnableExtraServiceRestartDelayOnMemPressure =
		DEFAULT_ENABLE_EXTRA_SERVICE_RESTART_DELAY_ON_MEM_PRESSURE;
		/** Whether to enable "component alias" experimental feature. */
		volatile boolean mEnableComponentAlias = DEFAULT_ENABLE_COMPONENT_ALIAS;

		/**
		* Defines component aliases. Format
		* ComponentName ":" ComponentName ( "," ComponentName ":" ComponentName )*
		*/
		volatile String mComponentAliasOverrides = DEFAULT_COMPONENT_ALIAS_OVERRIDES;

		private final ActivityManagerService mService;
		private ContentResolver mResolver;
		@@ -812,6 +824,10 @@ final class ActivityManagerConstants extends ContentObserver {
		case KEY_ENABLE_EXTRA_SERVICE_RESTART_DELAY_ON_MEM_PRESSURE:
		updateEnableExtraServiceRestartDelayOnMemPressure();
		break;
		case KEY_ENABLE_COMPONENT_ALIAS:
		case KEY_COMPONENT_ALIAS_OVERRIDES:
		updateComponentAliases();
		break;
		default:
		break;
		}
		@@ -1243,6 +1259,18 @@ final class ActivityManagerConstants extends ContentObserver {
		return def;
		}

		private void updateComponentAliases() {
		mEnableComponentAlias = DeviceConfig.getBoolean(
		DeviceConfig.NAMESPACE_ACTIVITY_MANAGER,
		KEY_ENABLE_COMPONENT_ALIAS,
		DEFAULT_ENABLE_COMPONENT_ALIAS);
		mComponentAliasOverrides = DeviceConfig.getString(
		DeviceConfig.NAMESPACE_ACTIVITY_MANAGER,
		KEY_COMPONENT_ALIAS_OVERRIDES,
		DEFAULT_COMPONENT_ALIAS_OVERRIDES);
		mService.mComponentAliasResolver.update(mEnableComponentAlias, mComponentAliasOverrides);
		}

		private void updateImperceptibleKillExemptions() {
		IMPERCEPTIBLE_KILL_EXEMPT_PACKAGES.clear();
		IMPERCEPTIBLE_KILL_EXEMPT_PACKAGES.addAll(mDefaultImperceptibleKillExemptPackages);
		@@ -1472,6 +1500,10 @@ final class ActivityManagerConstants extends ContentObserver {
		pw.print("="); pw.println(mPushMessagingOverQuotaBehavior);
		pw.print(" "); pw.print(KEY_FGS_ALLOW_OPT_OUT);
		pw.print("="); pw.println(mFgsAllowOptOut);
		pw.print(" "); pw.print(KEY_ENABLE_COMPONENT_ALIAS);
		pw.print("="); pw.println(mEnableComponentAlias);
		pw.print(" "); pw.print(KEY_COMPONENT_ALIAS_OVERRIDES);
		pw.print("="); pw.println(mComponentAliasOverrides);

		pw.println();
		if (mOverrideMaxCachedProcesses >= 0) {

services/core/java/com/android/server/am/ActivityManagerService.java

+17 −0

Original line number	Diff line number	Diff line
		@@ -779,6 +779,9 @@ public class ActivityManagerService extends IActivityManager.Stub
		@GuardedBy("this")
		private ArrayMap<String, PackageAssociationInfo> mAllowedAssociations;

		@GuardedBy("this")
		final ComponentAliasResolver mComponentAliasResolver;

		/**
		* Tracks association information for a particular package along with debuggability.
		* <p> Associations for a package A are allowed to package B if B is part of the
		@@ -2220,6 +2223,7 @@ public class ActivityManagerService extends IActivityManager.Stub
		mUseFifoUiScheduling = false;
		mEnableOffloadQueue = false;
		mFgBroadcastQueue = mBgBroadcastQueue = mOffloadBroadcastQueue = null;
		mComponentAliasResolver = new ComponentAliasResolver(this);
		}

		// Note: This method is invoked on the main thread but may need to attach various
		@@ -2346,6 +2350,7 @@ public class ActivityManagerService extends IActivityManager.Stub
		mInternal = new LocalService();
		mPendingStartActivityUids = new PendingStartActivityUids(mContext);
		mTraceErrorLogger = new TraceErrorLogger();
		mComponentAliasResolver = new ComponentAliasResolver(this);
		}

		public void setSystemServiceManager(SystemServiceManager mgr) {
		@@ -4784,6 +4789,10 @@ public class ActivityManagerService extends IActivityManager.Stub
		showConsoleNotificationIfActive();

		t.traceEnd();

		// Load the component aliases.
		mComponentAliasResolver.update(
		mConstants.mEnableComponentAlias, mConstants.mComponentAliasOverrides);
		}

		private void showConsoleNotificationIfActive() {
		@@ -8791,6 +8800,12 @@ public class ActivityManagerService extends IActivityManager.Stub
		pw.println("-------------------------------------------------------------------------------");
		}
		dumpUsers(pw);

		pw.println();
		if (dumpAll) {
		pw.println("-------------------------------------------------------------------------------");
		}
		mComponentAliasResolver.dump(pw);
		}
		}

		@@ -9107,6 +9122,8 @@ public class ActivityManagerService extends IActivityManager.Stub
		opti++;
		}
		mProcessList.mAppExitInfoTracker.dumpHistoryProcessExitInfo(pw, dumpPackage);
		} else if ("component-alias".equals(cmd)) {
		mComponentAliasResolver.dump(pw);
		} else {
		// Dumping a single activity?
		if (!mAtmInternal.dumpActivity(fd, pw, cmd, args, opti, dumpAll,

services/core/java/com/android/server/am/ComponentAliasResolver.java

0 → 100644

+326 −0

File added.

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