[C++] Fix EventTraceRecorder initialization (#3331)

MasterJH5574 · web-flow · commit 13a7d14ce061 · 2025-09-08T21:03:35.000-04:00
This PR fixes the initialization of EventTraceRecorder after the
enhancement of ObjectRef null safety.

Prior to this PR, EventTraceRecorder is designed as a not-nullable
class, while it doesn't have a corresponding constructor and is
initialized by `make_object` in an external function. This is
considered invalid with the ObjectRef null safety enhancement.
Therefore, we relax the requirement and allow it to be nullable.
diff --git a/3rdparty/tvm b/3rdparty/tvm
@@ -1 +1 @@
-Subproject commit 53ed43ac9343613fb11edea0dd9f066f96a84458
+Subproject commit 6dfbef9208120d73f08917da748eff9ef8a8ef96
diff --git a/cpp/serve/event_trace_recorder.h b/cpp/serve/event_trace_recorder.h
@@ -56,8 +56,7 @@ class EventTraceRecorder : public ObjectRef {
   /*! \brief Create an event trace recorder. */
   static EventTraceRecorder Create();
 
-  TVM_DEFINE_MUTABLE_NOTNULLABLE_OBJECT_REF_METHODS(EventTraceRecorder, ObjectRef,
-                                                    EventTraceRecorderObj);
+  TVM_DEFINE_MUTABLE_OBJECT_REF_METHODS(EventTraceRecorder, ObjectRef, EventTraceRecorderObj);
 };
 
 /****************** Helper macro ******************/
