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Commit ab0cbeff authored by Pascal Muetschard's avatar Pascal Muetschard
Browse files

DCL is broken and should not be used. 

Use the acceptable instance holder pattern as a replacement.

Change-Id: I0164b8c17db4e6e15aee5a862fa8e625a9b1bbf4
parent fbaaa44c

config/preloaded-classes-denylist

+1 −0
Original line number Diff line number Diff line
@@ -9,3 +9,4 @@ android.net.rtp.AudioGroup 
android.net.rtp.AudioStream

android.net.rtp.RtpStream

java.util.concurrent.ThreadLocalRandom

com.android.internal.jank.InteractionJankMonitor$InstanceHolder

core/java/com/android/internal/jank/InteractionJankMonitor.java

+5 −10
Original line number Diff line number Diff line
@@ -292,7 +292,10 @@ public class InteractionJankMonitor { 
            UIINTERACTION_FRAME_INFO_REPORTED__INTERACTION_TYPE__SHADE_CLEAR_ALL,

    };



    private static volatile InteractionJankMonitor sInstance;

    private static class InstanceHolder {

        public static final InteractionJankMonitor INSTANCE =

            new InteractionJankMonitor(new HandlerThread(DEFAULT_WORKER_NAME));

    }



    private final DeviceConfig.OnPropertiesChangedListener mPropertiesChangedListener =

            this::updateProperties;
@@ -384,15 +387,7 @@ public class InteractionJankMonitor { 
     * @return instance of InteractionJankMonitor

     */

    public static InteractionJankMonitor getInstance() {

        // Use DCL here since this method might be invoked very often.

        if (sInstance == null) {

            synchronized (InteractionJankMonitor.class) {

                if (sInstance == null) {

                    sInstance = new InteractionJankMonitor(new HandlerThread(DEFAULT_WORKER_NAME));

                }

            }

        }

        return sInstance;

        return InstanceHolder.INSTANCE;

    }



    /**