Fix GCStats failures on dotnet trace gc-verbose collections (#2414)#2415
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…t#2414) Two issues prevented the GCStats report from opening for traces collected via `dotnet trace --profile gc-verbose`: 1. `PrintEventCondemnedReasonsTable` in `GcStats.cs` threw NullReferenceException because `GetCondemnedReasonRow` returns null when a TraceGC has neither PerHeapCondemnedReasons nor GlobalCondemnedReasons. Skip such events instead of adding null rows to the table. 2. `AddConcurrentPauseTime` in `TraceManagedProcess.cs` had a `Debug.Assert(_event.PauseDurationMSec == 0)` that was always wrong for BackgroundGCs: the GCStart handler intentionally pre-seeds `PauseDurationMSec = SuspendDurationMSec` for BGCs, so by the time the initial RestartEEStop fires the value is non-zero by design. The else branch's assignment then correctly replaces it with the full pause. Remove the bogus assertion. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This was referenced May 20, 2026
Merged
This was referenced May 20, 2026
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Two issues prevented the GCStats report from opening for traces collected via
dotnet trace --profile gc-verbose:PrintEventCondemnedReasonsTableinGcStats.csthrew NullReferenceException becauseGetCondemnedReasonRowreturns null when a TraceGC has neither PerHeapCondemnedReasons nor GlobalCondemnedReasons. Skip such events instead of adding null rows to the table.AddConcurrentPauseTimeinTraceManagedProcess.cshad aDebug.Assert(_event.PauseDurationMSec == 0)that was always wrong for BackgroundGCs: the GCStart handler intentionally pre-seedsPauseDurationMSec = SuspendDurationMSecfor BGCs, so by the time the initial RestartEEStop fires the value is non-zero by design. The else branch's assignment then correctly replaces it with the full pause. Remove the bogus assertion.Fixes #2414