BaseBundle.java: Recycle underlying parcel when bundle is cleared. am: 2685de9862

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18795008

Change-Id: If037011bab47819a0a0678570904b834041e34c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/android/os/BaseBundle.java

@@ -31,6 +31,7 @@ import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
 
 import java.io.Serializable;
+import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Set;
 import java.util.function.BiFunction;
@@ -102,7 +103,7 @@ public class BaseBundle {
     /*
      * If mParcelledData is non-null, then mMap will be null and the
      * data are stored as a Parcel containing a Bundle.  When the data
-     * are unparcelled, mParcelledData willbe set to null.
+     * are unparcelled, mParcelledData will be set to null.
      */
     @UnsupportedAppUsage
     volatile Parcel mParcelledData = null;
@@ -112,6 +113,19 @@ public class BaseBundle {
      */
     private boolean mParcelledByNative;
 
+    /*
+     * Flag indicating if mParcelledData is only referenced in this bundle.
+     * mParcelledData could be referenced by other bundles if mMap contains lazy values,
+     * and bundle data is copied to another bundle using putAll or the copy constructors.
+     */
+    boolean mOwnsLazyValues = true;
+
+    /*
+     * As mParcelledData is set to null when it is unparcelled, we keep a weak reference to
+     * it to aid in recycling it. Do not use this reference otherwise.
+     */
+    private WeakReference<Parcel> mWeakParcelledData = null;
+
     /**
      * The ClassLoader used when unparcelling data from mParcelledData.
      */
@@ -200,6 +214,9 @@ public class BaseBundle {
             mClassLoader = from.mClassLoader;
 
             if (from.mMap != null) {
+                mOwnsLazyValues = false;
+                from.mOwnsLazyValues = false;
+
                 if (!deep) {
                     mMap = new ArrayMap<>(from.mMap);
                 } else {
@@ -434,6 +451,9 @@ public class BaseBundle {
             mMap = map;
             if (recycleParcel) {
                 recycleParcel(parcelledData);
+                mWeakParcelledData = null;
+            } else {
+                mWeakParcelledData = new WeakReference<>(parcelledData);
             }
             mParcelledByNative = false;
             mParcelledData = null;
@@ -575,6 +595,10 @@ public class BaseBundle {
      */
     public void clear() {
         unparcel();
+        if (mOwnsLazyValues && mWeakParcelledData != null) {
+            recycleParcel(mWeakParcelledData.get());
+            mWeakParcelledData = null;
+        }
         mMap.clear();
     }
 

core/java/android/os/Bundle.java

@@ -301,6 +301,8 @@ public final class Bundle extends BaseBundle implements Cloneable, Parcelable {
     public void putAll(Bundle bundle) {
         unparcel();
         bundle.unparcel();
+        mOwnsLazyValues = false;
+        bundle.mOwnsLazyValues = false;
         mMap.putAll(bundle.mMap);
 
         // FD state is now known if and only if both bundles already knew