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Enable Config-File Based Control of EventPipe (dotnet/coreclr#20238)
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311 changes: 210 additions & 101 deletions
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...coreclr/src/System.Private.CoreLib/src/System/Diagnostics/Eventing/EventPipeController.cs
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113 changes: 113 additions & 0 deletions
113
src/coreclr/tests/src/tracing/tracecontrol/TraceControl.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
| // See the LICENSE file in the project root for more information. | ||
|
|
||
| using System; | ||
| using System.IO; | ||
| using System.Reflection; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using Tracing.Tests.Common; | ||
|
|
||
| using Microsoft.Diagnostics.Tracing; | ||
| using Microsoft.Diagnostics.Tracing.Parsers.Clr; | ||
|
|
||
| namespace Tracing.Tests | ||
| { | ||
| public static class TraceControlTest | ||
| { | ||
| private static string ConfigFileContents = @" | ||
| OutputPath=. | ||
| CircularMB=2048 | ||
| Providers=*:0xFFFFFFFFFFFFFFFF:5 | ||
| "; | ||
|
|
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| private const int BytesInOneMB = 1024 * 1024; | ||
|
|
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| /// <summary> | ||
| /// This test collects a trace of itself and then performs some basic validation on the trace. | ||
| /// </summary> | ||
| public static int Main(string[] args) | ||
| { | ||
| // Calculate the path to the config file. | ||
| string configFileName = Assembly.GetEntryAssembly().GetName().Name + ".eventpipeconfig"; | ||
| string configFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, configFileName); | ||
| Console.WriteLine("Calculated config file path: " + configFilePath); | ||
|
|
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| // Write the config file to disk. | ||
| File.WriteAllText(configFilePath, ConfigFileContents); | ||
| Console.WriteLine("Wrote contents of config file."); | ||
|
|
||
| // Wait 5 seconds to ensure that tracing has started. | ||
| Console.WriteLine("Waiting 5 seconds for the config file to be picked up by the next poll operation."); | ||
| Thread.Sleep(TimeSpan.FromSeconds(5)); | ||
|
|
||
| // Do some work that we can look for in the trace. | ||
| Console.WriteLine("Do some work that will be captured by the trace."); | ||
| GC.Collect(2, GCCollectionMode.Forced); | ||
| Console.WriteLine("Done with the work."); | ||
|
|
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| // Delete the config file to start tracing. | ||
| File.Delete(configFilePath); | ||
| Console.WriteLine("Deleted the config file."); | ||
|
|
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| // Build the full path to the trace file. | ||
| string[] traceFiles = Directory.GetFiles(".", "*.netperf", SearchOption.TopDirectoryOnly); | ||
| Assert.Equal("traceFiles.Length == 1", traceFiles.Length, 1); | ||
| string traceFilePath = traceFiles[0]; | ||
|
|
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| // Poll the file system and wait for the trace file to be written. | ||
| Console.WriteLine("Wait for the config file deletion to be picked up and for the trace file to be written."); | ||
|
|
||
| // Wait for 1 second, which is the poll time when tracing is enabled. | ||
| Thread.Sleep(TimeSpan.FromSeconds(1)); | ||
|
|
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| // Poll for file size changes to the trace file itself. When the size of the trace file hasn't changed for 5 seconds, consider it fully written out. | ||
| Console.WriteLine("Waiting for the trace file to be written. Poll every second to watch for 5 seconds of no file size changes."); | ||
| long lastSizeInBytes = 0; | ||
| DateTime timeOfLastChangeUTC = DateTime.UtcNow; | ||
| do | ||
| { | ||
| FileInfo traceFileInfo = new FileInfo(traceFilePath); | ||
| long currentSizeInBytes = traceFileInfo.Length; | ||
| Console.WriteLine("Trace file size: " + ((double)currentSizeInBytes / BytesInOneMB)); | ||
|
|
||
| if (currentSizeInBytes > lastSizeInBytes) | ||
| { | ||
| lastSizeInBytes = currentSizeInBytes; | ||
| timeOfLastChangeUTC = DateTime.UtcNow; | ||
| } | ||
|
|
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| Thread.Sleep(TimeSpan.FromSeconds(1)); | ||
|
|
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| } while (DateTime.UtcNow.Subtract(timeOfLastChangeUTC) < TimeSpan.FromSeconds(5)); | ||
|
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| int retVal = 0; | ||
|
|
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| // Use TraceEvent to consume the trace file and look for the work that we did. | ||
| Console.WriteLine("Using TraceEvent to parse the file to find the work that was done during trace capture."); | ||
| using (var trace = TraceEventDispatcher.GetDispatcherFromFileName(traceFilePath)) | ||
| { | ||
| string gcReasonInduced = GCReason.Induced.ToString(); | ||
| string providerName = "Microsoft-Windows-DotNETRuntime"; | ||
| string gcTriggeredEventName = "GC/Triggered"; | ||
|
|
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| trace.Clr.GCTriggered += delegate (GCTriggeredTraceData data) | ||
| { | ||
| if (gcReasonInduced.Equals(data.Reason.ToString())) | ||
| { | ||
| Console.WriteLine("Detected an induced GC"); | ||
| retVal = 100; | ||
| } | ||
| }; | ||
|
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| trace.Process(); | ||
| } | ||
|
|
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| // Clean-up the resulting trace file. | ||
| File.Delete(traceFilePath); | ||
|
|
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| return retVal; | ||
| } | ||
| } | ||
| } |
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