Bump Microsoft.Diagnostics.Tracing.TraceEvent from 3.0.7 to 3.1.26

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Updated Microsoft.Diagnostics.Tracing.TraceEvent from 3.0.7 to 3.1.26.

Release notes

Sourced from Microsoft.Diagnostics.Tracing.TraceEvent's releases.

3.1.26

Roll-up through 2025/10/10.

• Only dispose non-null handles in ETWTraceEventSource #​2291
• Small cleanup in NettraceUniversalConverter #​2292
• Fix hyperlink focus visibility in dark mode and improve keyboard navigation #​2295
• Gracefully handle invalid characters in PATH #​2296
• Fix copying First/Last columns with pipe symbols to work in time range input #​2304

3.1.24

Roll-up through 2025/08/26.

• Implement NuGet Central Package Version Management [#​2262]
• Fix broken stacks warning for universal traces [#​2268]
• Fix jitted code symbols in universal traces to show assembly names instead of memfd:doublemapper [#​2269]
• Use themed background brush for menu and filter [#​2272]
• Improve rendering and dark mode [#​2274]
• Implement configurable symbol server authentication with /SymbolsAuth command line argument for PerfView and HeapDump [#​2278]
• Add a themed dialog [#​2276]
• Fix regression: "Goto Item in Callers/Callees" now accumulates across all threads [#​2284]
• Fix parsing issues and add support for additional events to the Linux perf text file parser [#​2286]
• Fix TraceLog live session RelatedActivityID/ContainerID corruption by preserving ExtendedData [#​2285]
• NetTrace LabelList metadata overrides and metadata flushing [#​2281]
• Fix NullReferenceException in ProviderBrowser.LevelSelected when deselecting level [#​2289]

3.1.23

Roll-up through 2025/07/11.

• Fixed TraceEvent CaptureState API to support previously unsupported keyword configurations. [#​2222]
• Added Exception Stacks view for .nettrace files to enhance exception diagnostics. [#​2223]
• Corrected outdated documentation references to "GC Heap Alloc Stacks". [#​2224]
• Fixed off-by-one error in P/Invoke buffer handling for Windows volume events. [#​2227]
• Fixed broken links in the PerfView user guide. [#​2225]
• Improved error handling by throwing when TdhEnumerateProviders fails, enabling better diagnostics. [#​2177]
• Added AutomationProperties.Name to the Process Selection DataGrid for improved accessibility. [#​2239]
• Fixed focus indicator visibility for hyperlinks in dark mode and high contrast themes. [#​2235]
• Addressed NullReferenceException in Anti-Malware view. [#​2233]
• Fixed WebView2 crash on close by implementing proper disposal pattern. [#​2230]
• Added support for native AOT gcdumps, expanding compatibility with modern .NET workloads. [#​2242]
• Fixed NVDA screen reader issue where Theme menu items did not announce selection state. [#​2237]
• Extended PredefinedDynamicTraceEventParser to support dynamic events from additional sources. [#​2232]
• Implemented MSFZ symbol format support in SymbolReader. [#​2244]
• Removed usage of DefaultAzureCredential, simplifying authentication dependencies. [#​2255]
• Added option to hide TimeStamp columns in the EventWindow View menu. [#​2247]
• Fixed NVDA screen reader reporting incorrect list count for File menu separators. [#​2257]
• Fixed unhandled exception when double-clicking in scroll bar area with no content. [#​2254]
• Fixed universal symbol conversion for overlapping mappings. [#​2252]
• Fixed TraceEvent.props to respect ProcessorArchitecture when RuntimeIdentifier is set. [#​2249]

3.1.22

Roll-up through 2025/06/04.

• Added GC Heap Analyzer support for .nettrace files to enhance memory analysis workflows. [#​2216]
• Introduced PredefinedDynamicTraceEventParser for known TraceLogging events, improving trace event parsing. [#​2220]
• Enabled selection of process trees in the process selection dialog for multi-process analysis, allowing deeper inspection across related processes. [#​2195]
• Implemented sorting for the Duration column in the process selection dialog using TotalDurationSeconds, improving usability. [#​2194]
• Improved NetTrace parameter parsing for better command-line flexibility. [#​2200]
• Fixed GetActiveSessionNames to handle ERROR_MORE_DATA, resolving session enumeration issues. [#​2196]
• Fixed ObjectDisposedException when opening Net OS Heap Alloc Stacks, improving stability. [#​2212]
• Fixed null reference exception in GenFragmentationPercent method, enhancing reliability. [#​2211]
• Fixed TreeView auto-expansion when opening trace files. [#​2218]
• Fixed StackViewer issue where "Set Time Range" reset "Goto Items by callees". [#​2208]
• Fixed markdown table formatting when copying from the stack viewer. [#​2203]
• Fixed TraceEvent NuGet package to exclude Windows-specific native DLLs. [#​2215]
• Removed PDB generation for .NET Core assemblies using CrossGen, reducing build overhead. [#​2202]
• Made symbol server timeout configurable and removed dead code in SymbolReader. [#​2209]
• Changed help ribbons to use textblocks, enabling tab navigation. [#​2201]

3.1.21

Roll-up through 2025/05/02.

• Change NetTrace format version support
• Add /OSHeapMaxMB to set a max size for OS heap sessions
• Implement Nettrace Support for Traces with Universal Providers
• Implement R2R Symbol Lookup for Linux Traces
• Fix NetTrace parsing for Start/Stop event names
• Fix IndexOutOfRangeException in ProcessGlobalHistory

3.1.20

Roll-up through 2025/04/01.

• Flamegraph and drill-in menu improvements
• Performance improvements around unhandled event dispatch
• Add configurable real-time delay in TraceLogEventSource
• Don't queue another flush during a real-time ETW session if one is already in-process
• Allow configuration of rundown providers for real-time EventPipe sessions
• Fix stack handling for NetTrace V4
• Add multi-line view for events viewer
• Misc accessibility fixes

3.1.19

Roll-up through 2025/01/30.

• Added missing time information in the Raw XML View for GCStats.
• Updated activity computation logic to support OpenTelemetry events.
• Changed timestamp values to use QPC time based on UTC for Relogger.
• Fixed issues with report command handling.
• Addressed various POH-related issues.
• Implemented file-size limitation for rundown using an ETW-based approach.

3.1.18

Roll-up through 2024/12/11.

• Fixed perfcollect install script on Azure Linux 3.
• Updated System.Text.Json to address Microsoft Security Advisory CVE-2024-43485 | .NET Denial of Service Vulnerability dotnet/announcements#329.

3.1.17

Roll-up through 2024/11/08.

• Numerous accessibility fixes to PerfView. This includes switching out the previous web browser plugin to use WebView2.
• Breaking changes to FastSerialization to ensure that only expected types are deserialized. This addresses potential vulnerabilities during deserialization of untrusted input. Details at Breaking Changes for FastSerialization microsoft/perfview#2121.

3.1.16

Roll-up through 2024/10/11.

• Performance improvements to DynamicParser.
• Fixed GetFileNameWithoutExtensionNoIllegalChars to only trim known file extensions.
• Fixed a memory leak when processing EventPipe traces.
• Added support for private/in-process loggers.

3.1.15

• Fixed an issue where /buildLayout resulted in an error when the user hadn't previously run PerfView on the machine.

3.1.14

Roll-up through 2024/08/26.

• Added missing Microsoft.Diagnostics.NETCore.Client dependency to the TraceEvent.
• ETWClrProfiler compiled with /QSpectre.
• Added /buildLayout <path> to PerfView. This allows users to build a self-contained fully-extracted version of PerfView that doesn't depend on %appdata%. This is useful for certain deployment mechanisms where the deployed PerfView shouldn't impact PerfView in %appdata%.

3.1.13

Roll-up through 2024/07/15.

• Update to ClrMD 4 with support for https://symweb.azurefd.net.
• Live session support for EventPipe.
• GC dynamic event support.
• PerfView now opens external links in the user's default browser instead of within the app's browser.
• Fixes an issue with LinuxPerfScriptProcessNameBuilder when using ParallelLinuxPerfScriptStackSource.

3.1.12

Roll-up through 2024/06/13.

• Build updates to support authentication to symbol servers in TraceEvent.

3.1.11

Roll-up through 2024/06/10.

• Add support to PerfView for interactive authentication to the new Symweb.
• Disable rundown for .NET 2.0 by default. Can be re-enabled via /NoV2Rundown:false.
• Fix /GCTriggeredStacks command line argument to enable rundown so that stacks are properly captured.
• Update TraceEvent project/Nuget package to remove unnecessary PackageReference elements since the update to netstandard2.0.
• Fix Contention Stacks view to function properly for .NET Framework and older .NET Core processes.

3.1.10

Roll-up through 2024/05/02.

• New stack views for contention and waithandle events.
• New ASP.NET Core Stats view.
• Events view now displays an absolute timestamp in addition to relative.
• GC API fixes.
• NuGet package dependency fixes.
• Fix to avoid overflow of /RundownMaxMB.

3.1.9

Roll-up through 2024/03/07.

• Provide an option in PerfView to enable/disable truncation of the full raw event in the Events view when selecting “Dump raw event”.
• Fix the TraceEvent nuspec file to include all dependencies.
• Trim whitespace when parsing /Providers.
• Fix live session decoding of self-describing events.

3.1.8

Roll-up through 2024/01/31.

• Ensure PerfView.exe exits after closing the main window.
• Add ETWTraceEventSource.DispatchBehavior to control whether the TaskID is fetched from the event header, or consumed from the hardcoded value in the parser. Used for scenarios where the TaskID is modified by a trace processing tool or when the TaskID otherwise varies.
• Fix surfacing of RelatedActivityID in real-time sessions.
• Stabilize root names for heap snapshots.

3.1.7

Roll-up through 2023/12/05.

• Properly setting the process.Log to be used by the GC to discern whether the process is running with SVR GC Threads
• Fix CTF structure alignment issue
• Show Object Size in for GCAllocationTick Events in Any Stacks
• Implementation of GC Dynamic Events
• Capture the Process Name from EventPipe Traces
• Fixes for Process Dump to GC Dump Conversion

3.1.6

Roll-up through 2023/10/20.

• Harden TraceEventSession.ProviderNameToGuid
• Fixed calculation of Alloc MB / Pause Time in GC
• New version of Microsoft.Diagnostics.Tracing.TraceEvent.SupportFiles
• Protect Initialization of TraceEventSession Provider Lists

3.1.5

Roll-up through 2023/08/24.

• Extensibility support for CtfTraceEventSource mappings. This is to enable custom parsers to register events with CtfTraceEventSource which operates off of event provider/name instead of ETW metadata.
• Fix computation of background GC pause times.

3.1.4

Roll-up through 2023/07/31.

• Update goto source functionality to display both inclusive and exclusive costs. Previously only inclusive costs were shown.
• Update LockCreated and ContentionStart_V2 events to allow for tracking of lock creation and acquisition of locks by thread.
• Support for uncompressed embedded source files in PDBs.
• Support for basic authentication when authenticating to symbol servers.
• Improvements to the Events view to launch maximized and to increase the number of allowed columns.
• Various security improvements including building with banned.h (avoid usage of unsafe native APIs), enabling additional binary hardening settings, and switching to secure random number generation.

3.1.3

Roll-up through 2023/05/16.

• Make Linux performance trace parsing more robust.
• Add support for capturing thread time data via perfcollect within containers.
• Add support for new instrumented code types generated by the .NET JIT.
• Fix bug where rundown is much more expensive than it should be.
• Address a stack overflow bug in TraceEventSession.GetActiveSessionNames.
• Allow users to specify a rundown file size limit. This is useful in environments with many processes where rundown takes a very long time.

3.1.2

Roll-up through 2023/04/12.

• Fixes a bug that causes symbols in stack views to not resolve.

3.1.1

Roll-up through 2023/04/04.

• Fixes a bug that resulted in significant degradation of performance in some apps due to very verbose events being enabled.
• Only refresh stack views when the filter/grouping criteria has changed.

3.1.0

Roll-up through 2023/03/31.

• Standardize all TraceEvent libraries to compile against netstandard2.0 only.
• Switch FastSerialization and TraceEvent projects to produce portable PDBs instead of Windows PDBs.
• Refactor PerfView dependencies to make them more explicit.
• Enable certificate revocation when contacting https endpoints.
• Convert ForceGC functionality to use built-in ETW capabilities and remove ICorDebug code from HeapDump.
• Cache the DIA class factory used for native symbol lookup.
• Dispose cached PDBs properly so that they aren’t locked on disk after use.
• Fix parsing of CTF metadata documents with out-of-order elements in LTTng traces.
• Several internal and surface area changes to Automated Trace Analysis capabilities.
• Enable opening of portable PDBs when running TraceEvent on Linux.
• Parse and consume new GC events, including a new GCSettings event.
• Fix native image PDB symbol resolution for diagsession files.
• Enable rundown event collection for GC and Tiered Compilation settings.
• Enable PerfView to capture the FileVersion fields for all .NET runtime DLLs consumed during trace capture and inject them into the trace.

3.0.8

Roll-up through 2023/02/24.

• Add a new collection option /UserCritContention and analysis view for analyzing work done while the UserCrit is held. This is interesting for UI apps that experience visual perturbances.
• Improvements to how TraceEvent and PerfView handle clean-up of ETW session handles.
• Movement of utility classes to the Microsoft.Diagnostics.Utilities namespace to avoid namespace collisions.
• Switch PerfView and TraceEvent to only use documented Win32 APIs. Remove OSExtensions.dll from PerfView and TraceEvent packaging.
• Remove InternalOnly checks in PerfView which limited features to users on Microsoft’s corporate network.

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Project	Deployment	Preview	Comments	Updated (UTC)
stuff2	Ready	Preview	Comment	Oct 24, 2025 3:23am