[android] Nettrace collected on CoreCLR Android including JIT+Loader events won't display in Perfview Loader/JITStats views.

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#114,216 opened on Apr 3, 2025 5 comments 0 reactions 1 assignee View on GitHub

@lateralusX is already working on this.

Since Apr 3, 2025.

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This issue has not been assessed yet.

Description

area-Diagnostics-coreclr os-android

Collecting JIT and Loader data through EventPipe on Android CoreCLR works and include all expected information, but there seem to be some parsing error in Perfviews Runtime Loader and JITStats views. The following error occurs in perfviews log:

Started: Opening dotnet-dsrouter_20250402_152420.nettrace
ETL Size 2.627 MB ETLX Size 2.668 MB
Completed: Opening dotnet-dsrouter_20250402_152420.nettrace (Elapsed Time: 0.056 sec)
Started: Opening JITStats
Completed: Opening JITStats (Elapsed Time: 0.098 sec)
Exception Occurred: System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Microsoft.Diagnostics.Tracing.Analysis.TraceLoadedDotNetRuntime.<>c__DisplayClass32_0.b__16(GCMarkWithTypeTraceData data)
at Microsoft.Diagnostics.Tracing.TraceEventDispatcher.DoDispatch(TraceEvent anEvent)
at Microsoft.Diagnostics.Tracing.Etlx.TraceLogEventSource.Process()
at PerfView.PerfViewJitStats.WriteHtmlBody(TraceLog dataFile, TextWriter output, String fileName, TextWriter log)
at PerfView.PerfViewHtmlReport.GenerateReportFile(StatusBar worker, TraceLog trace)
at PerfView.PerfViewHtmlReport.<>c__DisplayClass17_1.b__0()
at PerfView.StatusBar.<>c__DisplayClass22_0.b__0()
An exceptional condition occurred, see log for details.
Started: Opening EventStats
Completed: Opening EventStats (Elapsed Time: 0.054 sec)
Started: Opening myport.sock_20250402_144917.nettrace
ETL Size 0.295 MB ETLX Size 0.125 MB
Completed: Opening myport.sock_20250402_144917.nettrace (Elapsed Time: 0.045 sec)
Started: Opening EventStats
Completed: Opening EventStats (Elapsed Time: 0.000 sec)

Appears to be some issue with GC MarkWithType data events and might not be unique to Android, an OSX trace including the same GC event will also trigger this error.

Dominant language: C#
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