Merge "Lock for AppsFilter" into tm-dev am: f5e3cd3ec6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17675239

Change-Id: Ie74db22e1c4d56694927b5fa3c21877ce4b25c4b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -103,6 +103,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * application B is implicitly allowed to query for application A; regardless of any manifest
      * entries.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedSparseSetArray<Integer> mImplicitlyQueryable;
     private final SnapshotCache<WatchedSparseSetArray<Integer>> mImplicitQueryableSnapshot;
@@ -112,6 +113,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * interacted with it, but could keep across package updates. For example, if application A
      * grants persistable uri permission to application B; regardless of any manifest entries.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedSparseSetArray<Integer> mRetainedImplicitlyQueryable;
     private final SnapshotCache<WatchedSparseSetArray<Integer>>
@@ -121,6 +123,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * A mapping from the set of App IDs that query other App IDs via package name to the
      * list of packages that they can see.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedSparseSetArray<Integer> mQueriesViaPackage;
     private final SnapshotCache<WatchedSparseSetArray<Integer>> mQueriesViaPackageSnapshot;
@@ -129,6 +132,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * A mapping from the set of App IDs that query others via component match to the list
      * of packages that the they resolve to.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedSparseSetArray<Integer> mQueriesViaComponent;
     private final SnapshotCache<WatchedSparseSetArray<Integer>> mQueriesViaComponentSnapshot;
@@ -137,6 +141,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * A mapping from the set of App IDs that query other App IDs via library name to the
      * list of packages that they can see.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedSparseSetArray<Integer> mQueryableViaUsesLibrary;
     private final SnapshotCache<WatchedSparseSetArray<Integer>> mQueryableViaUsesLibrarySnapshot;
@@ -159,6 +164,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * A set of App IDs that are always queryable by any package, regardless of their manifest
      * content.
      */
+    @GuardedBy("mLock")
     @Watched
     private final WatchedArraySet<Integer> mForceQueryable;
     private final SnapshotCache<WatchedArraySet<Integer>> mForceQueryableSnapshot;
@@ -176,6 +182,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
     private final StateProvider mStateProvider;
     private SigningDetails mSystemSigningDetails;
 
+    @GuardedBy("mLock")
     @Watched
     private final WatchedArrayList<String> mProtectedBroadcasts;
     private final SnapshotCache<WatchedArrayList<String>> mProtectedBroadcastsSnapshot;
@@ -196,6 +203,11 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
 
     private volatile boolean mSystemReady = false;
 
+    /**
+     * Guards the accesses for the list/set fields except for {@link #mShouldFilterCache}
+     */
+    private final Object mLock = new Object();
+
     /**
      * A cached snapshot.
      */
@@ -328,6 +340,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      * The copy constructor is used by PackageManagerService to construct a snapshot.
      */
     private AppsFilterImpl(AppsFilterImpl orig) {
+        synchronized (orig.mLock) {
             mImplicitlyQueryable = orig.mImplicitQueryableSnapshot.snapshot();
             mImplicitQueryableSnapshot = new SnapshotCache.Sealed<>();
             mRetainedImplicitlyQueryable = orig.mRetainedImplicitlyQueryableSnapshot.snapshot();
@@ -342,6 +355,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
             mForceQueryableSnapshot = new SnapshotCache.Sealed<>();
             mProtectedBroadcasts = orig.mProtectedBroadcastsSnapshot.snapshot();
             mProtectedBroadcastsSnapshot = new SnapshotCache.Sealed<>();
+        }
         mQueriesViaComponentRequireRecompute = orig.mQueriesViaComponentRequireRecompute;
         mForceQueryableByDevicePackageNames =
                 Arrays.copyOf(orig.mForceQueryableByDevicePackageNames,
@@ -742,9 +756,11 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
             return false;
         }
         final boolean changed;
+        synchronized (mLock) {
             changed = retainOnUpdate
                     ? mRetainedImplicitlyQueryable.add(recipientUid, visibleUid)
                     : mImplicitlyQueryable.add(recipientUid, visibleUid);
+        }
         if (changed && DEBUG_LOGGING) {
             Slog.i(TAG, (retainOnUpdate ? "retained " : "") + "implicit access granted: "
                     + recipientUid + " -> " + visibleUid);
@@ -833,16 +849,19 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
             // packages for signature matches
             for (PackageStateInternal setting : existingSettings.values()) {
                 if (isSystemSigned(mSystemSigningDetails, setting)) {
+                    synchronized (mLock) {
                         mForceQueryable.add(setting.getAppId());
                     }
                 }
             }
+        }
 
         final AndroidPackage newPkg = newPkgSetting.getPkg();
         if (newPkg == null) {
             return null;
         }
 
+        synchronized (mLock) {
             if (mProtectedBroadcasts.addAll(newPkg.getProtectedBroadcasts())) {
                 mQueriesViaComponentRequireRecompute = true;
             }
@@ -911,7 +930,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                     mQueriesViaPackage.add(existingSetting.getAppId(), newPkgSetting.getAppId());
                 }
             }
-
+        }
         int existingSize = existingSettings.size();
         ArrayMap<String, AndroidPackage> existingPkgs = new ArrayMap<>(existingSize);
         for (int index = 0; index < existingSize; index++) {
@@ -1138,6 +1157,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
     private void collectProtectedBroadcasts(
             ArrayMap<String, ? extends PackageStateInternal> existingSettings,
             @Nullable String excludePackage) {
+        synchronized (mLock) {
             mProtectedBroadcasts.clear();
             for (int i = existingSettings.size() - 1; i >= 0; i--) {
                 PackageStateInternal setting = existingSettings.valueAt(i);
@@ -1151,6 +1171,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                 }
             }
         }
+    }
 
     /**
      * This method recomputes all component / intent-based visibility and is intended to match the
@@ -1158,6 +1179,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
      */
     private void recomputeComponentVisibility(
             ArrayMap<String, ? extends PackageStateInternal> existingSettings) {
+        synchronized (mLock) {
             mQueriesViaComponent.clear();
             for (int i = existingSettings.size() - 1; i >= 0; i--) {
                 PackageStateInternal setting = existingSettings.valueAt(i);
@@ -1179,6 +1201,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                     }
                 }
             }
+        }
         mQueriesViaComponentRequireRecompute = false;
     }
 
@@ -1189,9 +1212,11 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
     @Nullable
     public SparseArray<int[]> getVisibilityAllowList(PackageStateInternal setting, int[] users,
             ArrayMap<String, ? extends PackageStateInternal> existingSettings) {
+        synchronized (mLock) {
             if (mForceQueryable.contains(setting.getAppId())) {
                 return null;
             }
+        }
         // let's reserve max memory to limit the number of allocations
         SparseArray<int[]> result = new SparseArray<>(users.length);
         for (int u = 0; u < users.length; u++) {
@@ -1256,6 +1281,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
         mStateProvider.runWithState((settings, sharedUserSettings, users) -> {
             final ArraySet<String> additionalChangedPackages;
             final int userCount = users.length;
+            synchronized (mLock) {
                 for (int u = 0; u < userCount; u++) {
                     final int userId = users[u].id;
                     final int removingUid = UserHandle.getUid(userId, setting.getAppId());
@@ -1306,6 +1332,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                         mQueriesViaComponentRequireRecompute = true;
                     }
                 }
+            }
 
             additionalChangedPackages = mOverlayReferenceMapper.removePkg(setting.getPackageName());
             mFeatureConfig.updatePackageState(setting, true /*removed*/);
@@ -1562,12 +1589,14 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                 if (DEBUG_TRACING) {
                     Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "mForceQueryable");
                 }
+                synchronized (mLock) {
                     if (mForceQueryable.contains(targetAppId)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting, "force queryable");
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1577,12 +1606,14 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                 if (DEBUG_TRACING) {
                     Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "mQueriesViaPackage");
                 }
+                synchronized (mLock) {
                     if (mQueriesViaPackage.contains(callingAppId, targetAppId)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting, "queries package");
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1597,12 +1628,14 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                         recomputeComponentVisibility(settings);
                     });
                 }
+                synchronized (mLock) {
                     if (mQueriesViaComponent.contains(callingAppId, targetAppId)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting, "queries component");
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1614,12 +1647,14 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                     Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "mImplicitlyQueryable");
                 }
                 final int targetUid = UserHandle.getUid(targetUserId, targetAppId);
+                synchronized (mLock) {
                     if (mImplicitlyQueryable.contains(callingUid, targetUid)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting, "implicitly queryable for user");
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1631,6 +1666,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                     Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "mRetainedImplicitlyQueryable");
                 }
                 final int targetUid = UserHandle.getUid(targetUserId, targetAppId);
+                synchronized (mLock) {
                     if (mRetainedImplicitlyQueryable.contains(callingUid, targetUid)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting,
@@ -1638,6 +1674,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1682,12 +1719,14 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
                 if (DEBUG_TRACING) {
                     Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "mQueryableViaUsesLibrary");
                 }
+                synchronized (mLock) {
                     if (mQueryableViaUsesLibrary.contains(callingAppId, targetAppId)) {
                         if (DEBUG_LOGGING) {
                             log(callingSetting, targetPkgSetting, "queryable for library users");
                         }
                         return false;
                     }
+                }
             } finally {
                 if (DEBUG_TRACING) {
                     Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
@@ -1802,6 +1841,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
         pw.println("  system apps queryable: " + mSystemAppsQueryable);
         dumpPackageSet(pw, filteringAppId, mForceQueryable.untrackedStorage(),
                 "forceQueryable", "  ", expandPackages);
+        synchronized (mLock) {
             pw.println("  queries via package name:");
             dumpQueriesMap(pw, filteringAppId, mQueriesViaPackage, "    ", expandPackages);
             pw.println("  queries via component:");
@@ -1820,6 +1860,7 @@ public class AppsFilterImpl implements AppsFilterSnapshot, Watchable, Snappable
             dumpQueriesMap(pw, filteringAppId, mQueryableViaUsesLibrary, "    ",
                     expandPackages);
         }
+    }
 
     private static void dumpQueriesMap(PrintWriter pw, @Nullable Integer filteringId,
             WatchedSparseSetArray<Integer> queriesMap, String spacing,