android gdb

engine/Build.bee.cs

             "--sysroot="+flutterRoot+"/third_party/android_tools/ndk/platforms/android-16/arch-arm",
             "-L"+flutterRoot +            "/third_party/android_tools/ndk/sources/cxx-stl/llvm-libc++/libs/armeabi-v7a",
             "-Wl,--build-id=sha1",
+            "-g",
             "-Wl,-soname=libUIWidgets_d.so",
             "-Wl,--whole-archive",
         }));

engine/build.py

     "-o",
     soFile,
     "-Wl,--build-id=sha1",
+    "-g",
     "-Wl,-soname=libUIWidgets_d.so",
     "-Wl,--whole-archive",
 ]

engine/src/shell/platform/unity/android/unity_surface_manager.cc

 
   bool UnitySurfaceManager::MakeCurrent(const EGLSurface surface)
   {
-    int width_ = 100;
-    int height_ = 100;
+    
-    EGLBoolean a =  eglMakeCurrent(egl_display_, surface, surface, egl_context_) ==
+    EGLBoolean result =  eglMakeCurrent(egl_display_, surface, surface, egl_context_) ==
+    draw();
+    
+    return result;
+  }
-int i = 0;
+  void UnitySurfaceManager::draw() {
+    int width_ = 100;
+    int height_ = 100;
+    int i = 0;
       sk_sp<GrContext> gr_context_ = GrContext::MakeGL();
     UnityConsole::WriteLine(("test c++" +  std::to_string(i++)).c_str());
 
       m_SkSurface = SkSurface::MakeFromBackendTexture(
           gr_context_.get(), m_backendTex, kBottomLeft_GrSurfaceOrigin, 1,
           kRGBA_8888_SkColorType, nullptr, nullptr);
-    return a;
   }
 
   bool UnitySurfaceManager::MakeResourceCurrent()

engine/src/shell/platform/unity/android/unity_surface_manager.h

   FML_DISALLOW_COPY_AND_ASSIGN(UnitySurfaceManager);
 
  private:
+ void draw();
   bool Initialize(IUnityInterfaces* unity_interfaces);
   void CleanUp();