Merge "Mark slipWallpaperTouch as const" into udc-dev
diff --git a/include/android/surface_control.h b/include/android/surface_control.h
index e4ba58a..cce2e46 100644
--- a/include/android/surface_control.h
+++ b/include/android/surface_control.h
@@ -54,6 +54,12 @@
  * The caller takes ownership of the ASurfaceControl returned and must release it
  * using ASurfaceControl_release below.
  *
+ * By default the \a ASurfaceControl will be visible and display any buffer submitted. In
+ * addition, the default buffer submission control may release and not display all buffers
+ * that are submitted before receiving a callback for the previous buffer. See
+ * \a ASurfaceTransaction_setVisibility and \a ASurfaceTransaction_setEnableBackPressure to
+ * change the default behaviors after creation.
+ *
  * Available since API level 29.
  */
 ASurfaceControl* ASurfaceControl_createFromWindow(ANativeWindow* parent, const char* debug_name)
diff --git a/libs/binder/IUidObserver.cpp b/libs/binder/IUidObserver.cpp
index d952dc7..1c35f53 100644
--- a/libs/binder/IUidObserver.cpp
+++ b/libs/binder/IUidObserver.cpp
@@ -67,9 +67,10 @@
         remote()->transact(ON_UID_STATE_CHANGED_TRANSACTION, data, &reply, IBinder::FLAG_ONEWAY);
     }
 
-    virtual void onUidProcAdjChanged(uid_t uid) {
+    virtual void onUidProcAdjChanged(uid_t uid, int32_t adj) {
         Parcel data, reply;
         data.writeInt32((int32_t)uid);
+        data.writeInt32((int32_t)adj);
         remote()->transact(ON_UID_PROC_ADJ_CHANGED_TRANSACTION, data, &reply, IBinder::FLAG_ONEWAY);
     }
 };
@@ -121,7 +122,8 @@
         case ON_UID_PROC_ADJ_CHANGED_TRANSACTION: {
             CHECK_INTERFACE(IUidObserver, data, reply);
             uid_t uid = data.readInt32();
-            onUidProcAdjChanged(uid);
+            int32_t adj = data.readInt32();
+            onUidProcAdjChanged(uid, adj);
             return NO_ERROR;
         } break;
 
diff --git a/libs/binder/include_activitymanager/binder/IUidObserver.h b/libs/binder/include_activitymanager/binder/IUidObserver.h
index 17f03a9..5ea7447 100644
--- a/libs/binder/include_activitymanager/binder/IUidObserver.h
+++ b/libs/binder/include_activitymanager/binder/IUidObserver.h
@@ -34,7 +34,7 @@
     virtual void onUidIdle(uid_t uid, bool disabled) = 0;
     virtual void onUidStateChanged(uid_t uid, int32_t procState, int64_t procStateSeq,
                                    int32_t capability) = 0;
-    virtual void onUidProcAdjChanged(uid_t uid) = 0;
+    virtual void onUidProcAdjChanged(uid_t uid, int32_t adj) = 0;
 
     enum {
         ON_UID_GONE_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION,
diff --git a/libs/gui/include/gui/LayerState.h b/libs/gui/include/gui/LayerState.h
index 5c88a07..a6f503e 100644
--- a/libs/gui/include/gui/LayerState.h
+++ b/libs/gui/include/gui/LayerState.h
@@ -233,9 +233,10 @@
 
     // Geometry updates.
     static constexpr uint64_t GEOMETRY_CHANGES = layer_state_t::eBufferCropChanged |
-            layer_state_t::eBufferTransformChanged | layer_state_t::eCropChanged |
-            layer_state_t::eDestinationFrameChanged | layer_state_t::eMatrixChanged |
-            layer_state_t::ePositionChanged | layer_state_t::eTransformToDisplayInverseChanged |
+            layer_state_t::eBufferTransformChanged | layer_state_t::eCornerRadiusChanged |
+            layer_state_t::eCropChanged | layer_state_t::eDestinationFrameChanged |
+            layer_state_t::eMatrixChanged | layer_state_t::ePositionChanged |
+            layer_state_t::eTransformToDisplayInverseChanged |
             layer_state_t::eTransparentRegionChanged;
 
     // Buffer and related updates.
diff --git a/services/inputflinger/tests/FakeEventHub.cpp b/services/inputflinger/tests/FakeEventHub.cpp
index 4626f5a..212fceb 100644
--- a/services/inputflinger/tests/FakeEventHub.cpp
+++ b/services/inputflinger/tests/FakeEventHub.cpp
@@ -617,9 +617,11 @@
     }
     // If device sysfs changed -> reopen the device
     if (!mRawLightInfos.empty() && !foundDevice->classes.test(InputDeviceClass::LIGHT)) {
+        InputDeviceIdentifier identifier = foundDevice->identifier;
+        ftl::Flags<InputDeviceClass> classes = foundDevice->classes;
         removeDevice(foundDeviceId);
-        addDevice(foundDeviceId, foundDevice->identifier.name,
-                  foundDevice->classes | InputDeviceClass::LIGHT, foundDevice->identifier.bus);
+        addDevice(foundDeviceId, identifier.name, classes | InputDeviceClass::LIGHT,
+                  identifier.bus);
     }
 }
 
diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index fe72a69..0aa1bcb 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -288,7 +288,7 @@
             void onUidStateChanged(uid_t uid __unused, int32_t procState __unused,
                                    int64_t procStateSeq __unused,
                                    int32_t capability __unused) override {}
-            void onUidProcAdjChanged(uid_t uid __unused) override {}
+            void onUidProcAdjChanged(uid_t uid __unused, int32_t adj __unused) override {}
 
             void addOverrideUid(uid_t uid, bool active);
             void removeOverrideUid(uid_t uid);
diff --git a/services/surfaceflinger/FrontEnd/LayerCreationArgs.cpp b/services/surfaceflinger/FrontEnd/LayerCreationArgs.cpp
index cfa2b03..97af445 100644
--- a/services/surfaceflinger/FrontEnd/LayerCreationArgs.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerCreationArgs.cpp
@@ -50,7 +50,7 @@
     }
 
     if (internalLayer) {
-        sequence = getInternalLayerId(sInternalSequence++);
+        sequence = id.value_or(getInternalLayerId(sInternalSequence++));
     } else if (id) {
         sequence = *id;
         sSequence = *id + 1;
diff --git a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
index 6cacfb5..cd9515c 100644
--- a/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
+++ b/services/surfaceflinger/FrontEnd/LayerLifecycleManager.cpp
@@ -38,7 +38,8 @@
         RequestedLayerState& layer = *newLayer.get();
         auto [it, inserted] = mIdToLayer.try_emplace(layer.id, References{.owner = layer});
         if (!inserted) {
-            LOG_ALWAYS_FATAL("Duplicate layer id %d found. Existing layer: %s", layer.id,
+            LOG_ALWAYS_FATAL("Duplicate layer id found. New layer: %s Existing layer: %s",
+                             layer.getDebugString().c_str(),
                              it->second.owner.getDebugString().c_str());
         }
         mAddedLayers.push_back(newLayer.get());
@@ -200,8 +201,10 @@
 
             if (layer->what & layer_state_t::eBackgroundColorChanged) {
                 if (layer->bgColorLayerId == UNASSIGNED_LAYER_ID && layer->bgColor.a != 0) {
-                    LayerCreationArgs backgroundLayerArgs(layer->id,
-                                                          /*internalLayer=*/true);
+                    LayerCreationArgs
+                            backgroundLayerArgs(LayerCreationArgs::getInternalLayerId(
+                                                        LayerCreationArgs::sInternalSequence++),
+                                                /*internalLayer=*/true);
                     backgroundLayerArgs.parentId = layer->id;
                     backgroundLayerArgs.name = layer->name + "BackgroundColorLayer";
                     backgroundLayerArgs.flags = ISurfaceComposerClient::eFXSurfaceEffect;
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 9e40d7f..bfb7a22 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -254,7 +254,8 @@
         mFlinger->mTunnelModeEnabledReporter->decrementTunnelModeCount();
     }
     if (mHadClonedChild) {
-        mFlinger->mNumClones--;
+        auto& roots = mFlinger->mLayerMirrorRoots;
+        roots.erase(std::remove(roots.begin(), roots.end(), this), roots.end());
     }
     if (hasTrustedPresentationListener()) {
         mFlinger->mNumTrustedPresentationListeners--;
@@ -2552,7 +2553,10 @@
     return outputLayer ? outputLayer->getState().visibleRegion : Region();
 }
 
-void Layer::setInitialValuesForClone(const sp<Layer>& clonedFrom) {
+void Layer::setInitialValuesForClone(const sp<Layer>& clonedFrom, uint32_t mirrorRootId) {
+    mSnapshot->path.id = clonedFrom->getSequence();
+    mSnapshot->path.mirrorRootId = mirrorRootId;
+
     cloneDrawingState(clonedFrom.get());
     mClonedFrom = clonedFrom;
     mPremultipliedAlpha = clonedFrom->mPremultipliedAlpha;
@@ -2591,7 +2595,7 @@
     mDrawingState.inputInfo = tmpInputInfo;
 }
 
-void Layer::updateMirrorInfo() {
+bool Layer::updateMirrorInfo(const std::deque<Layer*>& cloneRootsPendingUpdates) {
     if (mClonedChild == nullptr || !mClonedChild->isClonedFromAlive()) {
         // If mClonedChild is null, there is nothing to mirror. If isClonedFromAlive returns false,
         // it means that there is a clone, but the layer it was cloned from has been destroyed. In
@@ -2599,7 +2603,7 @@
         // destroyed. The root, this layer, will still be around since the client can continue
         // to hold a reference, but no cloned layers will be displayed.
         mClonedChild = nullptr;
-        return;
+        return true;
     }
 
     std::map<sp<Layer>, sp<Layer>> clonedLayersMap;
@@ -2614,6 +2618,13 @@
     mClonedChild->updateClonedDrawingState(clonedLayersMap);
     mClonedChild->updateClonedChildren(sp<Layer>::fromExisting(this), clonedLayersMap);
     mClonedChild->updateClonedRelatives(clonedLayersMap);
+
+    for (Layer* root : cloneRootsPendingUpdates) {
+        if (clonedLayersMap.find(sp<Layer>::fromExisting(root)) != clonedLayersMap.end()) {
+            return false;
+        }
+    }
+    return true;
 }
 
 void Layer::updateClonedDrawingState(std::map<sp<Layer>, sp<Layer>>& clonedLayersMap) {
@@ -2653,7 +2664,7 @@
         }
         sp<Layer> clonedChild = clonedLayersMap[child];
         if (clonedChild == nullptr) {
-            clonedChild = child->createClone();
+            clonedChild = child->createClone(mirrorRoot->getSequence());
             clonedLayersMap[child] = clonedChild;
         }
         addChildToDrawing(clonedChild);
@@ -2761,7 +2772,7 @@
 void Layer::setClonedChild(const sp<Layer>& clonedChild) {
     mClonedChild = clonedChild;
     mHadClonedChild = true;
-    mFlinger->mNumClones++;
+    mFlinger->mLayerMirrorRoots.push_back(this);
 }
 
 bool Layer::setDropInputMode(gui::DropInputMode mode) {
@@ -3491,11 +3502,11 @@
     }
 }
 
-sp<Layer> Layer::createClone() {
+sp<Layer> Layer::createClone(uint32_t mirrorRootId) {
     LayerCreationArgs args(mFlinger.get(), nullptr, mName + " (Mirror)", 0, LayerMetadata());
     args.textureName = mTextureName;
     sp<Layer> layer = mFlinger->getFactory().createBufferStateLayer(args);
-    layer->setInitialValuesForClone(sp<Layer>::fromExisting(this));
+    layer->setInitialValuesForClone(sp<Layer>::fromExisting(this), mirrorRootId);
     return layer;
 }
 
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index b37fa15..4374914 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -248,7 +248,7 @@
     // true if this layer is visible, false otherwise
     virtual bool isVisible() const;
 
-    virtual sp<Layer> createClone();
+    virtual sp<Layer> createClone(uint32_t mirrorRoot);
 
     // Set a 2x2 transformation matrix on the layer. This transform
     // will be applied after parent transforms, but before any final
@@ -651,7 +651,7 @@
 
     gui::WindowInfo::Type getWindowType() const { return mWindowType; }
 
-    void updateMirrorInfo();
+    bool updateMirrorInfo(const std::deque<Layer*>& cloneRootsPendingUpdates);
 
     /*
      * doTransaction - process the transaction. This is a good place to figure
@@ -922,7 +922,7 @@
     friend class TransactionFrameTracerTest;
     friend class TransactionSurfaceFrameTest;
 
-    virtual void setInitialValuesForClone(const sp<Layer>& clonedFrom);
+    virtual void setInitialValuesForClone(const sp<Layer>& clonedFrom, uint32_t mirrorRootId);
     void preparePerFrameCompositionState();
     void preparePerFrameBufferCompositionState();
     void preparePerFrameEffectsCompositionState();
diff --git a/services/surfaceflinger/LayerRenderArea.cpp b/services/surfaceflinger/LayerRenderArea.cpp
index f6b5afc..d606cff 100644
--- a/services/surfaceflinger/LayerRenderArea.cpp
+++ b/services/surfaceflinger/LayerRenderArea.cpp
@@ -85,7 +85,7 @@
     // If layer is offscreen, update mirroring info if it exists
     if (mLayer->isRemovedFromCurrentState()) {
         mLayer->traverse(LayerVector::StateSet::Drawing,
-                         [&](Layer* layer) { layer->updateMirrorInfo(); });
+                         [&](Layer* layer) { layer->updateMirrorInfo({}); });
         mLayer->traverse(LayerVector::StateSet::Drawing,
                          [&](Layer* layer) { layer->updateCloneBufferInfo(); });
     }
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index 1e45b41..9319543 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -406,11 +406,13 @@
 
 void Scheduler::enableHardwareVsync(PhysicalDisplayId id) {
     auto schedule = getVsyncSchedule(id);
+    LOG_ALWAYS_FATAL_IF(!schedule);
     schedule->enableHardwareVsync(mSchedulerCallback);
 }
 
 void Scheduler::disableHardwareVsync(PhysicalDisplayId id, bool disallow) {
     auto schedule = getVsyncSchedule(id);
+    LOG_ALWAYS_FATAL_IF(!schedule);
     schedule->disableHardwareVsync(mSchedulerCallback, disallow);
 }
 
@@ -427,7 +429,10 @@
 void Scheduler::resyncToHardwareVsyncLocked(PhysicalDisplayId id, bool allowToEnable,
                                             std::optional<Fps> refreshRate) {
     const auto displayOpt = mDisplays.get(id);
-    LOG_ALWAYS_FATAL_IF(!displayOpt);
+    if (!displayOpt) {
+        ALOGW("%s: Invalid display %s!", __func__, to_string(id).c_str());
+        return;
+    }
     const Display& display = *displayOpt;
 
     if (display.schedulePtr->isHardwareVsyncAllowed(allowToEnable)) {
@@ -446,7 +451,10 @@
     ftl::FakeGuard guard(kMainThreadContext);
 
     const auto displayOpt = mDisplays.get(id);
-    LOG_ALWAYS_FATAL_IF(!displayOpt);
+    if (!displayOpt) {
+        ALOGW("%s: Invalid display %s!", __func__, to_string(id).c_str());
+        return;
+    }
     const Display& display = *displayOpt;
     const auto mode = display.selectorPtr->getActiveMode();
 
@@ -478,12 +486,18 @@
     const auto hwcVsyncPeriod = ftl::Optional(hwcVsyncPeriodIn).transform([](nsecs_t nanos) {
         return Period::fromNs(nanos);
     });
-    return getVsyncSchedule(id)->addResyncSample(mSchedulerCallback, TimePoint::fromNs(timestamp),
-                                                 hwcVsyncPeriod);
+    auto schedule = getVsyncSchedule(id);
+    if (!schedule) {
+        ALOGW("%s: Invalid display %s!", __func__, to_string(id).c_str());
+        return false;
+    }
+    return schedule->addResyncSample(mSchedulerCallback, TimePoint::fromNs(timestamp),
+                                     hwcVsyncPeriod);
 }
 
 void Scheduler::addPresentFence(PhysicalDisplayId id, std::shared_ptr<FenceTime> fence) {
     auto schedule = getVsyncSchedule(id);
+    LOG_ALWAYS_FATAL_IF(!schedule);
     const bool needMoreSignals = schedule->getController().addPresentFence(std::move(fence));
     if (needMoreSignals) {
         schedule->enableHardwareVsync(mSchedulerCallback);
@@ -553,6 +567,7 @@
     {
         std::scoped_lock lock(mDisplayLock);
         auto vsyncSchedule = getVsyncScheduleLocked(id);
+        LOG_ALWAYS_FATAL_IF(!vsyncSchedule);
         vsyncSchedule->getController().setDisplayPowerMode(powerMode);
     }
     if (!isPacesetter) return;
@@ -582,7 +597,9 @@
     }
 
     const auto displayOpt = mDisplays.get(*idOpt);
-    LOG_ALWAYS_FATAL_IF(!displayOpt);
+    if (!displayOpt) {
+        return nullptr;
+    }
     return displayOpt->get().schedulePtr;
 }
 
diff --git a/services/surfaceflinger/Scheduler/Scheduler.h b/services/surfaceflinger/Scheduler/Scheduler.h
index 43aab2d..f13c878 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.h
+++ b/services/surfaceflinger/Scheduler/Scheduler.h
@@ -196,8 +196,8 @@
     // Sets the render rate for the scheduler to run at.
     void setRenderRate(PhysicalDisplayId, Fps);
 
-    void enableHardwareVsync(PhysicalDisplayId);
-    void disableHardwareVsync(PhysicalDisplayId, bool disallow);
+    void enableHardwareVsync(PhysicalDisplayId) REQUIRES(kMainThreadContext);
+    void disableHardwareVsync(PhysicalDisplayId, bool disallow) REQUIRES(kMainThreadContext);
 
     // Resyncs the scheduler to hardware vsync.
     // If allowToEnable is true, then hardware vsync will be turned on.
@@ -219,7 +219,8 @@
     // otherwise.
     bool addResyncSample(PhysicalDisplayId, nsecs_t timestamp,
                          std::optional<nsecs_t> hwcVsyncPeriod);
-    void addPresentFence(PhysicalDisplayId, std::shared_ptr<FenceTime>) EXCLUDES(mDisplayLock);
+    void addPresentFence(PhysicalDisplayId, std::shared_ptr<FenceTime>) EXCLUDES(mDisplayLock)
+            REQUIRES(kMainThreadContext);
 
     // Layers are registered on creation, and unregistered when the weak reference expires.
     void registerLayer(Layer*);
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index d406aff..172df03 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1146,17 +1146,26 @@
     std::optional<PhysicalDisplayId> displayIdOpt;
     {
         Mutex::Autolock lock(mStateLock);
-        displayIdOpt = getPhysicalDisplayIdLocked(displayToken);
+        if (displayToken) {
+            displayIdOpt = getPhysicalDisplayIdLocked(displayToken);
+            if (!displayIdOpt) {
+                ALOGW("%s: Invalid physical display token %p", __func__, displayToken.get());
+                return NAME_NOT_FOUND;
+            }
+        } else {
+            // TODO (b/277364366): Clients should be updated to pass in the display they
+            // want, rather than us picking an arbitrary one (the active display, in this
+            // case).
+            displayIdOpt = mActiveDisplayId;
+        }
     }
 
-    // TODO (b/277364366): Clients should be updated to pass in the display they
-    // want, rather than us picking an arbitrary one (the pacesetter, in this
-    // case).
-    if (displayToken && !displayIdOpt) {
-        ALOGE("%s: Invalid physical display token %p", __func__, displayToken.get());
+    const auto schedule = mScheduler->getVsyncSchedule(displayIdOpt);
+    if (!schedule) {
+        ALOGE("%s: Missing VSYNC schedule for display %s!", __func__,
+              to_string(*displayIdOpt).c_str());
         return NAME_NOT_FOUND;
     }
-    const auto schedule = mScheduler->getVsyncSchedule(displayIdOpt);
     outStats->vsyncTime = schedule->vsyncDeadlineAfter(TimePoint::now()).ns();
     outStats->vsyncPeriod = schedule->period().ns();
     return NO_ERROR;
@@ -2136,7 +2145,9 @@
     static_cast<void>(mScheduler->schedule([=]() FTL_FAKE_GUARD(mStateLock) {
         {
             ftl::FakeGuard guard(kMainThreadContext);
-            mScheduler->getVsyncSchedule(id)->setPendingHardwareVsyncState(enabled);
+            if (auto schedule = mScheduler->getVsyncSchedule(id)) {
+                schedule->setPendingHardwareVsyncState(enabled);
+            }
         }
 
         ATRACE_FORMAT("%s (%d) for %" PRIu64 " (main thread)", whence, enabled, id.value);
@@ -2307,7 +2318,7 @@
                 sp<Layer> bgColorLayer = getFactory().createEffectLayer(
                         LayerCreationArgs(this, nullptr, layer->name,
                                           ISurfaceComposerClient::eFXSurfaceEffect, LayerMetadata(),
-                                          std::make_optional(layer->parentId), true));
+                                          std::make_optional(layer->id), true));
                 mLegacyLayers[bgColorLayer->sequence] = bgColorLayer;
             }
             const bool willReleaseBufferOnLatch = layer->willReleaseBufferOnLatch();
@@ -2874,7 +2885,10 @@
     }
 
     for (auto layer : mLayersWithBuffersRemoved) {
-        for (auto layerStack : layer->mPreviouslyPresentedLayerStacks) {
+        std::vector<ui::LayerStack> previouslyPresentedLayerStacks =
+                std::move(layer->mPreviouslyPresentedLayerStacks);
+        layer->mPreviouslyPresentedLayerStacks.clear();
+        for (auto layerStack : previouslyPresentedLayerStacks) {
             auto optDisplay = layerStackToDisplay.get(layerStack);
             if (optDisplay && !optDisplay->get()->isVirtual()) {
                 auto fence = getHwComposer().getPresentFence(optDisplay->get()->getPhysicalId());
@@ -4006,8 +4020,21 @@
     }
 
     commitOffscreenLayers();
-    if (mNumClones > 0) {
-        mDrawingState.traverse([&](Layer* layer) { layer->updateMirrorInfo(); });
+    if (mLayerMirrorRoots.size() > 0) {
+        std::deque<Layer*> pendingUpdates;
+        pendingUpdates.insert(pendingUpdates.end(), mLayerMirrorRoots.begin(),
+                              mLayerMirrorRoots.end());
+        std::vector<Layer*> needsUpdating;
+        for (Layer* cloneRoot : mLayerMirrorRoots) {
+            pendingUpdates.pop_front();
+            if (cloneRoot->updateMirrorInfo(pendingUpdates)) {
+            } else {
+                needsUpdating.push_back(cloneRoot);
+            }
+        }
+        for (Layer* cloneRoot : needsUpdating) {
+            cloneRoot->updateMirrorInfo({});
+        }
     }
 }
 
@@ -4114,7 +4141,7 @@
         mBootStage = BootStage::BOOTANIMATION;
     }
 
-    if (mNumClones > 0) {
+    if (mLayerMirrorRoots.size() > 0) {
         mDrawingState.traverse([&](Layer* layer) { layer->updateCloneBufferInfo(); });
     }
 
@@ -5243,7 +5270,7 @@
             return result;
         }
 
-        mirrorLayer->setClonedChild(mirrorFrom->createClone());
+        mirrorLayer->setClonedChild(mirrorFrom->createClone(mirrorLayer->getSequence()));
     }
 
     outResult.layerId = mirrorLayer->sequence;
@@ -8022,7 +8049,7 @@
                 Mutex::Autolock lock(mStateLock);
                 createEffectLayer(mirrorArgs, &unused, &childMirror);
                 MUTEX_ALIAS(mStateLock, childMirror->mFlinger->mStateLock);
-                childMirror->setClonedChild(layer->createClone());
+                childMirror->setClonedChild(layer->createClone(childMirror->getSequence()));
                 childMirror->reparent(mirrorDisplay.rootHandle);
             }
             // lock on mStateLock needs to be released before binder handle gets destroyed
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index cd7659b..92e19c0 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -296,8 +296,7 @@
     // the client can no longer modify this layer directly.
     void onHandleDestroyed(BBinder* handle, sp<Layer>& layer, uint32_t layerId);
 
-    // TODO: Remove atomic if move dtor to main thread CL lands
-    std::atomic<uint32_t> mNumClones;
+    std::vector<Layer*> mLayerMirrorRoots;
 
     TransactionCallbackInvoker& getTransactionCallbackInvoker() {
         return mTransactionCallbackInvoker;
diff --git a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
index a32750e..8061a8f 100644
--- a/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
+++ b/services/surfaceflinger/fuzzer/surfaceflinger_scheduler_fuzzer.h
@@ -75,7 +75,7 @@
 
     bool isVisible() const override { return true; }
 
-    sp<Layer> createClone() override { return nullptr; }
+    sp<Layer> createClone(uint32_t /* mirrorRootId */) override { return nullptr; }
 };
 
 class FuzzImplVSyncTracker : public scheduler::VSyncTracker {
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 3713275..55705ca 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -104,6 +104,7 @@
         "SurfaceFlinger_DisplayTransactionCommitTest.cpp",
         "SurfaceFlinger_ExcludeDolbyVisionTest.cpp",
         "SurfaceFlinger_GetDisplayNativePrimariesTest.cpp",
+        "SurfaceFlinger_GetDisplayStatsTest.cpp",
         "SurfaceFlinger_HdrOutputControlTest.cpp",
         "SurfaceFlinger_HotplugTest.cpp",
         "SurfaceFlinger_InitializeDisplaysTest.cpp",
diff --git a/services/surfaceflinger/tests/unittests/SurfaceFlinger_GetDisplayStatsTest.cpp b/services/surfaceflinger/tests/unittests/SurfaceFlinger_GetDisplayStatsTest.cpp
new file mode 100644
index 0000000..29acfaa
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/SurfaceFlinger_GetDisplayStatsTest.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "SurfaceFlingerGetDisplayStatsTest"
+
+#include <compositionengine/Display.h>
+#include <compositionengine/mock/DisplaySurface.h>
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
+#include <renderengine/mock/RenderEngine.h>
+#include <ui/DisplayStatInfo.h>
+#include "TestableSurfaceFlinger.h"
+#include "mock/DisplayHardware/MockComposer.h"
+#include "mock/DisplayHardware/MockPowerAdvisor.h"
+#include "mock/MockTimeStats.h"
+#include "mock/system/window/MockNativeWindow.h"
+
+using namespace android;
+using namespace testing;
+
+namespace android {
+namespace {
+using FakeHwcDisplayInjector = TestableSurfaceFlinger::FakeHwcDisplayInjector;
+using FakeDisplayDeviceInjector = TestableSurfaceFlinger::FakeDisplayDeviceInjector;
+
+constexpr hal::HWDisplayId HWC_DISPLAY = FakeHwcDisplayInjector::DEFAULT_HWC_DISPLAY_ID;
+constexpr PhysicalDisplayId DEFAULT_DISPLAY_ID = PhysicalDisplayId::fromPort(42u);
+constexpr int DEFAULT_DISPLAY_WIDTH = 1920;
+constexpr int DEFAULT_DISPLAY_HEIGHT = 1024;
+
+class SurfaceFlingerGetDisplayStatsTest : public Test {
+public:
+    void SetUp() override;
+
+protected:
+    TestableSurfaceFlinger mFlinger;
+    renderengine::mock::RenderEngine* mRenderEngine = new renderengine::mock::RenderEngine();
+    sp<DisplayDevice> mDisplay;
+    sp<compositionengine::mock::DisplaySurface> mDisplaySurface =
+            sp<compositionengine::mock::DisplaySurface>::make();
+    sp<mock::NativeWindow> mNativeWindow = sp<mock::NativeWindow>::make();
+    mock::TimeStats* mTimeStats = new mock::TimeStats();
+    Hwc2::mock::PowerAdvisor* mPowerAdvisor = nullptr;
+    Hwc2::mock::Composer* mComposer = nullptr;
+};
+
+void SurfaceFlingerGetDisplayStatsTest::SetUp() {
+    mFlinger.setupMockScheduler({.displayId = DEFAULT_DISPLAY_ID});
+    mComposer = new Hwc2::mock::Composer();
+    mPowerAdvisor = new Hwc2::mock::PowerAdvisor();
+    mFlinger.setupRenderEngine(std::unique_ptr<renderengine::RenderEngine>(mRenderEngine));
+    mFlinger.setupTimeStats(std::shared_ptr<TimeStats>(mTimeStats));
+    mFlinger.setupComposer(std::unique_ptr<Hwc2::Composer>(mComposer));
+    mFlinger.setupPowerAdvisor(std::unique_ptr<Hwc2::PowerAdvisor>(mPowerAdvisor));
+    static constexpr bool kIsPrimary = true;
+    FakeHwcDisplayInjector(DEFAULT_DISPLAY_ID, hal::DisplayType::PHYSICAL, kIsPrimary)
+            .setPowerMode(hal::PowerMode::ON)
+            .inject(&mFlinger, mComposer);
+    auto compostionEngineDisplayArgs =
+            compositionengine::DisplayCreationArgsBuilder()
+                    .setId(DEFAULT_DISPLAY_ID)
+                    .setPixels({DEFAULT_DISPLAY_WIDTH, DEFAULT_DISPLAY_HEIGHT})
+                    .setPowerAdvisor(mPowerAdvisor)
+                    .setName("injected display")
+                    .build();
+    auto compositionDisplay =
+            compositionengine::impl::createDisplay(mFlinger.getCompositionEngine(),
+                                                   std::move(compostionEngineDisplayArgs));
+    mDisplay =
+            FakeDisplayDeviceInjector(mFlinger, compositionDisplay,
+                                      ui::DisplayConnectionType::Internal, HWC_DISPLAY, kIsPrimary)
+                    .setDisplaySurface(mDisplaySurface)
+                    .setNativeWindow(mNativeWindow)
+                    .setPowerMode(hal::PowerMode::ON)
+                    .setRefreshRateSelector(mFlinger.scheduler()->refreshRateSelector())
+                    .skipRegisterDisplay()
+                    .inject();
+}
+
+// TODO (b/277364366): Clients should be updated to pass in the display they want.
+TEST_F(SurfaceFlingerGetDisplayStatsTest, nullptrSucceeds) {
+    DisplayStatInfo info;
+    status_t status = mFlinger.getDisplayStats(nullptr, &info);
+    EXPECT_EQ(status, NO_ERROR);
+}
+
+TEST_F(SurfaceFlingerGetDisplayStatsTest, explicitToken) {
+    DisplayStatInfo info;
+    status_t status = mFlinger.getDisplayStats(mDisplay->getDisplayToken().promote(), &info);
+    EXPECT_EQ(status, NO_ERROR);
+}
+
+TEST_F(SurfaceFlingerGetDisplayStatsTest, invalidToken) {
+    const String8 displayName("fakeDisplay");
+    sp<IBinder> displayToken = mFlinger.createDisplay(displayName, false);
+    DisplayStatInfo info;
+    status_t status = mFlinger.getDisplayStats(displayToken, &info);
+    EXPECT_EQ(status, NAME_NOT_FOUND);
+}
+
+} // namespace
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index cfa366f..a189c00 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -56,6 +56,9 @@
 #include "mock/system/window/MockNativeWindow.h"
 
 namespace android {
+
+struct DisplayStatInfo;
+
 namespace renderengine {
 
 class RenderEngine;
@@ -545,6 +548,10 @@
         return sp<DisplayDevice>::make(creationArgs);
     }
 
+    status_t getDisplayStats(const sp<IBinder>& displayToken, DisplayStatInfo* outInfo) {
+        return mFlinger->getDisplayStats(displayToken, outInfo);
+    }
+
     /* ------------------------------------------------------------------------
      * Read-only access to private data to assert post-conditions.
      */
diff --git a/services/surfaceflinger/tests/unittests/mock/MockLayer.h b/services/surfaceflinger/tests/unittests/mock/MockLayer.h
index 0d94f4c..50e07fc 100644
--- a/services/surfaceflinger/tests/unittests/mock/MockLayer.h
+++ b/services/surfaceflinger/tests/unittests/mock/MockLayer.h
@@ -32,7 +32,7 @@
     MOCK_CONST_METHOD0(getType, const char*());
     MOCK_METHOD0(getFrameSelectionPriority, int32_t());
     MOCK_CONST_METHOD0(isVisible, bool());
-    MOCK_METHOD0(createClone, sp<Layer>());
+    MOCK_METHOD1(createClone, sp<Layer>(uint32_t));
     MOCK_CONST_METHOD0(getFrameRateForLayerTree, FrameRate());
     MOCK_CONST_METHOD0(getDefaultFrameRateCompatibility,
                        scheduler::LayerInfo::FrameRateCompatibility());