From 54cd53136c8236ace62b5d9c09ab97b793ec051a Mon Sep 17 00:00:00 2001
From: David Mason <davmason@microsoft.com>
Date: Sun, 13 Nov 2022 00:13:15 -0800
Subject: [PATCH] Don't emit manifest for NativeRuntimeEventSource (#78213)

---
 .../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 cdaa7eea9c1935..80c26cc0319b44 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
@@ -2897,8 +2897,13 @@ 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);