(Case 1104581) PackedMemorySnapshot: Missing "subSystemList" field in PlayerLoopSystem TypeDescripti

Using the UnityEditor.MemoryProfiler API to capture a PackedMemorySnapshot, causes some fields in the typeDescriptions array to be missing.

The following "PlayerLoopSystem" struct contains a "PlayerLoopSystem[] subSystemList" field in code, but when capturing a memory snapshot, this field is missing in the TypeDescription.

This issue seems to occur with ScriptingBackend .NET 3.5 only. If you set it to .NET 4, it causes a different issue which I reported as Case 1104590.

Code (CSharp):

1. public struct PlayerLoopSystem // Located in namespace UnityEngine.Experimental.LowLevel
2. {
3.     public Type type;
4.     public PlayerLoopSystem[] subSystemList;  // this field is missing in the memory snapshot TypeDescription
5.     public UpdateFunction updateDelegate;
6.     public IntPtr updateFunction;
7.     public IntPtr loopConditionFunction;
8. }

Reproduce

• Open user attached project
• Click Mainmenu > BugReport > Open TestCode Window
• Click "Capture Memory" button

Observe the text shows the memory snapshot contains all fields, except the "PlayerLoopSystem[] subSystemList" field.


Actual
"subSystemList" field is missing in PlayerLoopSystem type.

Expected
No fields missing in the PlayerLoopSystem type.

 

QA was able to reproduce the issue and it can be found in the public issue tracker now:
https://issuetracker.unity3d.com/is...d-if-the-field-is-an-array-of-the-same-struct

Thank you Unity QA!