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Third Party Issue
Votes
1
Found in
2021.3.5f1
2022.1.7f1
2022.2.0a19
2023.1.0a2
Issue ID
UUM-9235
Regression
No
Crash when entering or exiting Play mode on Windows
To reproduce:
1. Open the project “Kalman test”
2. Open the scene “SampleScene” (Assets → Scenes → SampleScene)
3. Enter Play mode
4. Exit Play mode
5. Observe a crash
Reproducible with: 2021.3.5f1, 2022.1.7f1, 2022.2.0b1, 2023.1.0a2
Could not test with: 2020.3.36f1 (Console errors)
Reproduced on: Windows 10
Not reproduced on: macOS Monterey 12.4 (Intel)
First frames of the stack trace:
0x00007FFCB7DC4FD9 (KERNELBASE) RaiseException
0x00007FFC454D064C (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\utils\\mono-log-common.c:143] mono_log_write_logfile
0x00007FFC454BC4A2 (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\eglib\\goutput.c:172] monoeg_g_logv_nofree
0x00007FFC454BC508 (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\eglib\\goutput.c:187] monoeg_g_log
0x00007FFC454BBDC2 (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\eglib\\gmem.c:138] monoeg_malloc0
0x00007FFC4562B632 (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\metadata\\object.c:7953] mono_utf16_to_utf8len
0x00007FFC4562B413 (mono-2.0-bdwgc) \[C:\\build\\output\\Unity-Technologies\\mono\\mono\\metadata\\object.c:7911] mono_string_to_utf8
0x00007FF786F52175 (Unity) MonoStringToCpp
Notes:
*·* 2023.1.0a2 crashes not every time (three out of eight)
*·* The crash occurs after the 3rd or 4th step. If not, repeat 3 and 4 steps a couple of times
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Resolution Note:
The crash is caused by a memory corruption caused by the EigenCore C wrapper code.
https://github.com/modios/EigenCore/blob/95a1b30c70549636d7d250486cfbf5476049c4f3/src/native/EigenNative.cpp#L203
The line must be changed to Map<MatrixXd> result(vout, row1, col1);
With this particular scenario (prior to the fix), 'result' is constructed as a 9x9 but the input buffer (vout) is only 9x1.
If you make this change and rebuild the native dll, the crash is resolved.