package android.content.pm;
import android.Manifest;
+import android.annotation.Nullable;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
mContext.registerReceiver(mUserRemovedReceiver, userFilter);
}
- private final void handlePackageEvent(Intent intent, int userId) {
+ @VisibleForTesting
+ protected void handlePackageEvent(Intent intent, int userId) {
// Don't regenerate the services map when the package is removed or its
// ASEC container unmounted as a step in replacement. The subsequent
// _ADDED / _AVAILABLE call will regenerate the map in the final state.
public void invalidateCache(int userId) {
synchronized (mServicesLock) {
+ if (DEBUG) {
+ Slog.d(TAG, "invalidating cache for " + userId + " " + mInterfaceName);
+ }
final UserServices<V> user = findOrCreateUserLocked(userId);
user.services = null;
onServicesChangedLocked(userId);
* or null to assume that everything is affected.
* @param userId the user for whom to update the services map.
*/
- private void generateServicesMap(int[] changedUids, int userId) {
+ private void generateServicesMap(@Nullable int[] changedUids, int userId) {
if (DEBUG) {
Slog.d(TAG, "generateServicesMap() for " + userId + ", changed UIDs = "
+ Arrays.toString(changedUids));
}
- final ArrayList<ServiceInfo<V>> serviceInfos = new ArrayList<>();
- final List<ResolveInfo> resolveInfos = queryIntentServices(userId);
- for (ResolveInfo resolveInfo : resolveInfos) {
- try {
- ServiceInfo<V> info = parseServiceInfo(resolveInfo);
- if (info == null) {
- Log.w(TAG, "Unable to load service info " + resolveInfo.toString());
- continue;
- }
- serviceInfos.add(info);
- } catch (XmlPullParserException|IOException e) {
- Log.w(TAG, "Unable to load service info " + resolveInfo.toString(), e);
- }
- }
-
synchronized (mServicesLock) {
final UserServices<V> user = findOrCreateUserLocked(userId);
- final boolean firstScan = user.services == null;
- if (firstScan) {
+ final boolean cacheInvalid = user.services == null;
+ if (cacheInvalid) {
user.services = Maps.newHashMap();
}
+ final ArrayList<ServiceInfo<V>> serviceInfos = new ArrayList<>();
+ final List<ResolveInfo> resolveInfos = queryIntentServices(userId);
+
+ for (ResolveInfo resolveInfo : resolveInfos) {
+ try {
+ // when changedUids == null, we want to do a rescan of everything, this means
+ // it's the initial scan, and containsUid will trivially return true
+ // when changedUids != null, we got here because a package changed, but
+ // invalidateCache could have been called (thus user.services == null), and we
+ // should query from PackageManager again
+ if (!cacheInvalid
+ && !containsUid(
+ changedUids, resolveInfo.serviceInfo.applicationInfo.uid)) {
+ if (DEBUG) {
+ Slog.d(TAG, "Skipping parseServiceInfo for " + resolveInfo);
+ }
+ continue;
+ }
+ ServiceInfo<V> info = parseServiceInfo(resolveInfo);
+ if (info == null) {
+ Log.w(TAG, "Unable to load service info " + resolveInfo.toString());
+ continue;
+ }
+ serviceInfos.add(info);
+ } catch (XmlPullParserException | IOException e) {
+ Log.w(TAG, "Unable to load service info " + resolveInfo.toString(), e);
+ }
+ }
+
StringBuilder changes = new StringBuilder();
boolean changed = false;
for (ServiceInfo<V> info : serviceInfos) {
changed = true;
user.services.put(info.type, info);
user.persistentServices.put(info.type, info.uid);
- if (!(user.mPersistentServicesFileDidNotExist && firstScan)) {
+ if (!(user.mPersistentServicesFileDidNotExist && cacheInvalid)) {
notifyListener(info.type, userId, false /* removed */);
}
} else if (previousUid == info.uid) {
package android.content.pm;
+import android.content.Intent;
import android.content.res.Resources;
import android.os.FileUtils;
import android.os.Parcel;
assertEquals(0, cache.getPersistentServicesSize(u1));
}
+ /**
+ * Check that an optimization to skip a call to PackageManager handles an invalidated cache.
+ *
+ * We added an optimization in generateServicesMap to only query PackageManager for packages
+ * that have been changed, because if a package is unchanged, we have already cached the
+ * services info for it, so we can save a query to PackageManager (and save some memory).
+ * However, if invalidateCache was called, we cannot optimize, and must do a full query.
+ * The initial optimization was buggy because it failed to check for an invalidated cache, and
+ * only scanned the changed packages, given in the ACTION_PACKAGE_CHANGED intent (b/122912184).
+ */
+ public void testParseServiceInfoOptimizationHandlesInvalidatedCache() {
+ TestServicesCache cache = new TestServicesCache();
+ cache.addServiceForQuerying(U0, r1, newServiceInfo(t1, UID1));
+ cache.addServiceForQuerying(U0, r2, newServiceInfo(t2, UID2));
+ assertEquals(2, cache.getAllServicesSize(U0));
+
+ // simulate the client of the cache invalidating it
+ cache.invalidateCache(U0);
+
+ // there should be 0 services (userServices.services == null ) at this point, but we don't
+ // call getAllServicesSize since that would force a full scan of packages,
+ // instead we trigger a package change in a package that is in the list of services
+ Intent intent = new Intent(Intent.ACTION_PACKAGE_CHANGED);
+ intent.putExtra(Intent.EXTRA_UID, UID1);
+ cache.handlePackageEvent(intent, U0);
+
+ // check that the optimization does a full query and caches both services
+ assertEquals(2, cache.getAllServicesSize(U0));
+ }
+
private static RegisteredServicesCache.ServiceInfo<TestServiceType> newServiceInfo(
TestServiceType type, int uid) {
final ComponentInfo info = new ComponentInfo();
map = new HashMap<>();
mServices.put(userId, map);
}
+ // in actual cases, resolveInfo should always have a serviceInfo, since we specifically
+ // query for intent services
+ resolveInfo.serviceInfo = new android.content.pm.ServiceInfo();
+ resolveInfo.serviceInfo.applicationInfo =
+ new ApplicationInfo(serviceInfo.componentInfo.applicationInfo);
map.put(resolveInfo, serviceInfo);
}
public void onUserRemoved(int userId) {
super.onUserRemoved(userId);
}
+
+ @Override
+ public void handlePackageEvent(Intent intent, int userId) {
+ super.handlePackageEvent(intent, userId);
+ }
}
static class TestSerializer implements XmlSerializerAndParser<TestServiceType> {