fix: profiling - unknown stacktraces on net8

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- Unknown stack frames in profiles on .NET 8+ ([#3967](https://github.com/getsentry/sentry-dotnet/pull/3967))
+
 ## 5.3.0
 
 ### Features
@@ -30,6 +36,7 @@
 ### Fixes
 
 - Fix mismapped breadcrumb levels coming in from native to dotnet SDK ([#3993](https://github.com/getsentry/sentry-dotnet/pull/3993))
+- Deduplicate profiling stack frames ([#3969](https://github.com/getsentry/sentry-dotnet/pull/3969))
 
 ### Dependencies
 
@@ -50,7 +57,6 @@
 - Fixed envelopes with oversized attachments getting stuck in __processing ([#3938](https://github.com/getsentry/sentry-dotnet/pull/3938))
 - OperatingSystem will now return macOS as OS name instead of 'Darwin' as well as the proper version. ([#2710](https://github.com/getsentry/sentry-dotnet/pull/3956))
 - Ignore null value on CocoaScopeObserver.SetTag ([#3948](https://github.com/getsentry/sentry-dotnet/pull/3948))
-- Deduplicate profiling stack frames ([#3969](https://github.com/getsentry/sentry-dotnet/pull/3969))
 
 ## 5.1.0
 

src/Sentry.Profiling/SampleProfilerSession.cs

@@ -12,7 +12,6 @@ namespace Sentry.Profiling;
 internal class SampleProfilerSession : IDisposable
 {
     private readonly EventPipeSession _session;
-    private readonly TraceLogEventSource _eventSource;
     private readonly SampleProfilerTraceEventParser _sampleEventParser;
     private readonly IDiagnosticLogger? _logger;
     private readonly SentryStopwatch _stopwatch;
@@ -23,8 +22,8 @@ private SampleProfilerSession(SentryStopwatch stopwatch, EventPipeSession sessio
     {
         _session = session;
         _logger = logger;
-        _eventSource = eventSource;
-        _sampleEventParser = new SampleProfilerTraceEventParser(_eventSource);
+        EventSource = eventSource;
+        _sampleEventParser = new SampleProfilerTraceEventParser(EventSource);
         _stopwatch = stopwatch;
         _processing = processing;
     }
@@ -38,7 +37,7 @@ private SampleProfilerSession(SentryStopwatch stopwatch, EventPipeSession sessio
         //   Default = GC | Type | GCHeapSurvivalAndMovement | Binder | Loader | Jit | NGen | SupressNGen
         //                | StopEnumeration | Security | AppDomainResourceManagement | Exception | Threading | Contention | Stack | JittedMethodILToNativeMap
         //                | ThreadTransfer | GCHeapAndTypeNames | Codesymbols | Compilation,
-        new EventPipeProvider(ClrTraceEventParser.ProviderName, EventLevel.Informational, (long) ClrTraceEventParser.Keywords.Default),
+        new EventPipeProvider(ClrTraceEventParser.ProviderName, EventLevel.Verbose, (long) ClrTraceEventParser.Keywords.Default),
         new EventPipeProvider(SampleProfilerTraceEventParser.ProviderName, EventLevel.Informational),
         // new EventPipeProvider(TplEtwProviderTraceEventParser.ProviderName, EventLevel.Informational, (long) TplEtwProviderTraceEventParser.Keywords.Default)
     };
@@ -48,11 +47,14 @@ private SampleProfilerSession(SentryStopwatch stopwatch, EventPipeSession sessio
     // need a large buffer if we're connecting righ away. Leaving it too large increases app memory usage.
     internal static int CircularBufferMB = 16;
 
+    // Exposed for tests
+    internal TraceLogEventSource EventSource { get; }
+
     public SampleProfilerTraceEventParser SampleEventParser => _sampleEventParser;
 
     public TimeSpan Elapsed => _stopwatch.Elapsed;
 
-    public TraceLog TraceLog => _eventSource.TraceLog;
+    public TraceLog TraceLog => EventSource.TraceLog;
 
     // default is false, set 1 for true.
     private static int _throwOnNextStartupForTests = 0;
@@ -110,15 +112,15 @@ public async Task WaitForFirstEventAsync(CancellationToken cancellationToken = d
     {
         var tcs = new TaskCompletionSource();
         var cb = (TraceEvent _) => { tcs.TrySetResult(); };
-        _eventSource.AllEvents += cb;
+        EventSource.AllEvents += cb;
         try
         {
             // Wait for the first event to be processed.
             await tcs.Task.WaitAsync(cancellationToken).ConfigureAwait(false);
         }
         finally
         {
-            _eventSource.AllEvents -= cb;
+            EventSource.AllEvents -= cb;
         }
     }
 
@@ -132,7 +134,7 @@ public void Stop()
                 _session.Stop();
                 _processing.Wait();
                 _session.Dispose();
-                _eventSource.Dispose();
+                EventSource.Dispose();
             }
             catch (Exception ex)
             {

test/Sentry.Profiling.Tests/SamplingTransactionProfilerTests.cs

@@ -1,4 +1,5 @@
-using System.IO.Abstractions.TestingHelpers;
+using Microsoft.Diagnostics.Tracing;
+using Microsoft.Diagnostics.Tracing.Parsers.Clr;
 using Sentry.Internal.Http;
 
 namespace Sentry.Profiling.Tests;
@@ -180,6 +181,46 @@ public async Task Profiler_AfterTimeout_Stops()
         }
     }
 
+
+    /// <summary>
+    /// Guards regression of https://github.com/microsoft/perfview/issues/2155
+    /// </summary>
+    [SkippableFact]
+    public async Task EventPipeSession_ReceivesExpectedCLREvents()
+    {
+        SampleProfilerSession? session = null;
+        SkipIfFailsInCI(() => session = SampleProfilerSession.StartNew(_testOutputLogger));
+        using (session)
+        {
+            var eventsReceived = new HashSet<string>();
+            session!.EventSource.Clr.MethodLoadVerbose += (_) => eventsReceived.Add("Method/LoadVerbose");
+            session!.EventSource.Clr.MethodILToNativeMap += (_) => eventsReceived.Add("Method/ILToNativeMap");
+
+            await session.WaitForFirstEventAsync(CancellationToken.None);
+            var tries = 0;
+            while (eventsReceived.Count < 2 && tries++ < 10)
+            {
+                if (tries > 1)
+                {
+                    await Task.Delay(100);
+                }
+                var limitMs = 50;
+                var sut = new SamplingTransactionProfiler(_testSentryOptions, session, limitMs, CancellationToken.None);
+                MethodToBeLoaded(100);
+                RunForMs(limitMs);
+                sut.Finish();
+            }
+
+            Assert.Contains("Method/LoadVerbose", eventsReceived);
+            Assert.Contains("Method/ILToNativeMap", eventsReceived);
+        }
+    }
+
+    private static long MethodToBeLoaded(int n)
+    {
+        return -n;
+    }
+
     [SkippableTheory]
     [InlineData(true)]
     [InlineData(false)]