commit 5e7371cec37711a0a822a7b553a340a4605efc89
author Ady Abraham <adyabr@google.com> Tue Mar 24 14:47:24 2020 -0700
committer Ady Abraham <adyabr@google.com> Tue Mar 24 15:45:03 2020 -0700
tree 9795af16bd5c406a13fdf5f7253e94e55d4c8432
parent 0002e6c4f5205e2b2f091bac99d9bb5f31b6167b

SurfaceFlinger: add debug information when vsync is not generated

Print debug information about VsyncReactor internal state when
we expect a vsync event but it is not generated.

Bug: 151892277
Test: adb shell dumpsys SurfaceFlinger --dispsync
Test: simulate a missed vsync and observed logcat
Change-Id: Ia98cb884321d0c25610c4d721f422d9cd05c8c5e

services/surfaceflinger/Scheduler/EventThread.h

diff --git a/services/surfaceflinger/Scheduler/EventThread.h b/services/surfaceflinger/Scheduler/EventThread.h
index 466234d..98b1876 100644
--- a/services/surfaceflinger/Scheduler/EventThread.h
+++ b/services/surfaceflinger/Scheduler/EventThread.h
@@ -66,6 +66,8 @@
     virtual void setVSyncEnabled(bool enable) = 0;
     virtual void setCallback(Callback* callback) = 0;
     virtual void setPhaseOffset(nsecs_t phaseOffset) = 0;
+
+    virtual void dump(std::string& result) const = 0;
 };
 
 class EventThreadConnection : public BnDisplayEventConnection {