Tracking references

  • Reference Viewer

  • Right click on node & selec`t show referenced (objs that current obj points to/depends on) & show referencing (other objs that point to current obj)

  • “obj refs name= S_Hex_Urban_Standard_03 shortest”

Reference From https://www.unrealengine.com/en-US/blog/debugging-and-optimizing-memory

  • Show referencing property: obj refs name=/Game/Development/VRIntegrator/Blueprints/BPC_VRRadialMenu

  • obj dependencies

  • Right click->audit asset->size map

  • Breakpoint FSoftObjectPath::SerializePath and then resave the sequence

  • Print out a text export of one of the offending assets that would help - you can do this with RMB->Asset Actions->Export.

Reference From https://udn.unrealengine.com/questions/427836/ulevelsequencebindingreferences-causes-unnecessary.html

Tracking Garbage Collector references to an object:

 static int32 URamaStaticFunctionLib::GetObjReferenceCount(UObject* Obj, TArray<UObject*>* OutReferredToObjects = nullptr)
 {
         if(!Obj || !Obj->IsValidLowLevelFast())
         {
                 return -1;
         }

 TArray<UObject*> ReferredToObjects;                                //req outer, ignore archetype, recursive, ignore transient
         FReferenceFinder ObjectReferenceCollector( ReferredToObjects, Obj, false, true, true, false);
         ObjectReferenceCollector.FindReferences( Obj );

 if(OutReferredToObjects)
         {
                 OutReferredToObjects->Append(ReferredToObjects);
         }
         return OutReferredToObjects.Num();
 }

Reference From https://wiki.unrealengine.com/Garbage_Collection_~_Count_References_To_Any_Object#Code

  • Non-UObject References:

Normal, non-UObjects can also have the ability to add a reference to an object and prevent garbage collection. To do that, your object must derive from FGCObject and override its AddReferencedObjects class.

 class FMyNormalClass : public FGCObject
 {
 public:
 UObject* SafeObject;

 FMyNormalClass(UObject* Object)
 : SafeObject(Object)
 {
 }

 void AddReferencedObjects(FReferenceCollector& Collector) override
 {
 Collector.AddReferencedObject(SafeObject);
 }
 };

Reference From https://docs.unrealengine.com/latest/INT/Programming/Introduction/index.html

TStrongObjectPtr FGCObjectScopeGuard


Last update: February 6, 2020