Output perfView events (#64)

Author: nohwnd

Profiler/Profiler.psd1

@@ -8,7 +8,7 @@
 RootModule = 'Profiler.psm1'
 
 # Version number of this module.
-ModuleVersion = '4.0.1'
+ModuleVersion = '4.1.0'
 
 # Supported PSEditions
 # CompatiblePSEditions = @()

csharp/Profiler.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.30431.218
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.33530.505
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Profiler", "Profiler\Profiler.csproj", "{84FC4143-E62C-469F-82F2-6575045EC0B6}"
 EndProject

csharp/Profiler/ProfilerTracer.cs

@@ -1,11 +1,46 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Diagnostics.Tracing;
 using System.Management.Automation;
 using System.Management.Automation.Language;
 
 namespace Profiler
 {
+    [EventSource(Name = "Profiler")]
+    public class ProfilerEventSource : EventSource
+    {
+        private ProfilerEventSource() { }
+
+        public void WriteStart(int index, string functionName, string text)
+        {
+            WriteEvent(1, index, AsNonNull(functionName), Max100Chars(text));
+        }
+
+        public void WriteStop(int index, string functionName, string text)
+        {
+            WriteEvent(2, index, AsNonNull(functionName), Max100Chars(text));
+        }
+
+        public static ProfilerEventSource Log { get; } = new ProfilerEventSource();
+
+        private static string AsNonNull(string functionName)
+        {
+            return functionName ?? string.Empty;
+        }
+
+        private static string Max100Chars(string text)
+        {
+            text = AsNonNull(text);
+            if (text.Length > 100)
+            {
+                return text.Substring(0, 100);
+            }
+
+            return text;
+        }
+    }
+
     public class ProfilerTracer : ITracer
     {
         // timespan ticks are 10k per millisecond, but the stopwatch can have different resolution
@@ -41,9 +76,9 @@ public void Trace(IScriptExtent extent, ScriptBlock scriptBlock, int level, stri
             if (_index > 0)
             {
                 SetSelfDurationAndAddToHits(ref _previousHit, timestamp);
+                ProfilerEventSource.Log.WriteStop(_previousHit.Index, _previousHit.Function, _previousHit.Text);
             }
 
-
 #if !POWERSHELL3
             if (!ScriptBlocks.ContainsKey(scriptBlock.Id))
             {
@@ -59,7 +94,6 @@ public void Trace(IScriptExtent extent, ScriptBlock scriptBlock, int level, stri
                 }
       }          
 #endif
-
             // overwrite the previous event because we already scraped it
             _previousHit = new Hit();
             _previousHit.StartTime = TimeSpan.FromTicks(timestamp);
@@ -85,6 +119,7 @@ public void Trace(IScriptExtent extent, ScriptBlock scriptBlock, int level, stri
             _previousHit.Level = level;
 
             _index++;
+            ProfilerEventSource.Log.WriteStart(_previousHit.Index, _previousHit.Function, _previousHit.Text);
         }
 
         private void SetSelfDurationAndAddToHits(ref Hit eventRecord, long timestamp)