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Commit a8ed28ba authored by Pablo Gamito's avatar Pablo Gamito
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Add WM API to start and stop transcation trace 

Provides a way to eaily collect transaction traces from Flicker like is done for layer traces

Bug: 230462538
Test: collect transaction traces in Flicker using this API
Change-Id: Ie27cf60cac012af8fd23835cd0c6f0250dc72e42
parent a158b44d

core/java/android/view/IWindowManager.aidl

+5 −0
Original line number Diff line number Diff line
@@ -748,6 +748,11 @@ interface IWindowManager 
     */

    void setLayerTracingFlags(int flags);



    /**

     * Toggle active SurfaceFlinger transaction tracing.

     */

    void setActiveTransactionTracing(boolean active);



    /**

     * Forwards a scroll capture request to the appropriate window, if available.

     *

services/core/java/com/android/server/wm/WindowManagerService.java

+35 −0
Original line number Diff line number Diff line
@@ -8764,6 +8764,41 @@ public class WindowManagerService extends IWindowManager.Stub 
        }

    }



    /**

     * Toggle active transaction tracing.

     * Setting to true increases the buffer size for active debugging.

     * Setting to false resets the buffer size and dumps the trace to file.

     */

    public void setActiveTransactionTracing(boolean active) {

        if (!checkCallingPermission(

                android.Manifest.permission.DUMP, "setActiveTransactionTracing()")) {

            throw new SecurityException("Requires DUMP permission");

        }



        final long token = Binder.clearCallingIdentity();

        try {

            Parcel data = null;

            try {

                IBinder sf = ServiceManager.getService("SurfaceFlinger");

                if (sf != null) {

                    data = Parcel.obtain();

                    data.writeInterfaceToken("android.ui.ISurfaceComposer");

                    data.writeInt(active ? 1 : 0);

                    sf.transact(/* TRANSACTION_TRACE_CONTROL_CODE */ 1041, data,

                            null, 0 /* flags */);

                }

            } catch (RemoteException e) {

                Slog.e(TAG, "Failed to set transaction tracing");

            } finally {

                if (data != null) {

                    data.recycle();

                }

            }

        } finally {

            Binder.restoreCallingIdentity(token);

        }

    }



    @Override

    public boolean mirrorDisplay(int displayId, SurfaceControl outSurfaceControl) {

        if (!checkCallingPermission(READ_FRAME_BUFFER, "mirrorDisplay()")) {