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Third Party Issue
Votes
0
Found in
2021.3.44f1
2022.3.49f1
6000.0.22f1
Issue ID
UUM-83601
Regression
No
Big chunk of "Untracked" memory in the Memory Profiler screenshot when a custom .obj file is loaded while in Play Mode
Reproduction steps:
1. Open the attached "repro_IN-84472" project
2. Open the "Assets/TriLib/TriLibSamples/AssetViewer/AssetViewer.unity" Scene
3. Enter the Play Mode
4. Press the "Load Model from File" button and select the "Assets/TestModel/Gebaeude_LOD2_Blatt1056.obj" file
5. Once it loads, open the "Memory Profiler" by going to the "Windows -> Analysis -> Memory Profiler"
6. In the "Memory Profiler", press the "Capture New Snapshot" button
7. In the "Allocated Memory Distribution" section, observe the memory distribution
Expected result: There are no "Untracked" memory
Actual result: There's a big chunk of "Untracked" memory
Reproducible with: 2021.3.44f1, 2022.3.49f1, 6000.0.22f1
Reproducible on: Windows 10 (22H2)
Not reproducible on: No other environments tested
Notes:
- Reproducible in Player
- “TriLib” does not use native plugins to load the sample model nor does any allocations with “Marshal.AllocHGlobal”
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Resolution Note:
After some investigations it seems like TriLib uses StbImageSharp which calls Hebron.Runtime.CRuntime.malloc which in turn calls into Marshal.AllocHGlobal() which is treated as untracked.