Fix IPC response for CollectTracingV2 (dotnet/coreclr#26224)

Commit migrated from https://github.com/dotnet/coreclr/commit/0467a570d1e37fccd125dac4fb6953c37458ab41

diff --git a/src/coreclr/src/vm/eventpipeprotocolhelper.cpp b/src/coreclr/src/vm/eventpipeprotocolhelper.cpp
index 7cac9d0546f8d86d0759c9b0714284c1dc6838a8..b18fa160c26b3f66d0a42e8441d18f55f60380d2 100644 (file)
--- a/src/coreclr/src/vm/eventpipeprotocolhelper.cpp
+++ b/src/coreclr/src/vm/eventpipeprotocolhelper.cpp
@@ -292,6 +292,13 @@ void EventPipeProtocolHelper::CollectTracing2(DiagnosticsIpc::IpcMessage& messag
         delete payload;
         delete pStream;
     }
+    else
+    {
+        DiagnosticsIpc::IpcMessage successResponse;
+        if (successResponse.Initialize(DiagnosticsIpc::GenericSuccessHeader, sessionId))
+            successResponse.Send(pStream);
+        EventPipe::StartStreaming(sessionId);
+    }
 }
 
 #endif // FEATURE_PERFTRACING