From 8a7da0e0b38fc346ff88bff3374970b8453e090b Mon Sep 17 00:00:00 2001
From: David Mason <davmason@microsoft.com>
Date: Fri, 11 Nov 2022 03:35:35 -0800
Subject: [PATCH] Don't emit manifest for NativeRuntimeEventSource

---
 .../src/System/Diagnostics/Tracing/EventSource.cs          | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
index fc8c2a8226cdd8..14186011ecef7a 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs
@@ -2807,8 +2807,13 @@ private void EnsureDescriptorsInitialized()
         // Today, we only send the manifest to ETW, custom listeners don't get it.
         private unsafe void SendManifest(byte[]? rawManifest)
         {
-            if (rawManifest == null)
+            if (rawManifest == null
+                // Don't send the manifest for NativeRuntimeEventSource, it is conceptually
+                // an extension of the native coreclr provider
+                || m_name.Equals("Microsoft-Windows-DotNETRuntime"))
+            {
                 return;
+            }
 
             Debug.Assert(!SelfDescribingEvents);