From 1049eddff177ecf0d6952a941f56d2c7711cfd9b Mon Sep 17 00:00:00 2001
From: Ruslan Lesiutin <hoxy@meta.com>
Date: Wed, 5 Nov 2025 03:12:20 -0800
Subject: [PATCH 1/2] Change visibility of tracing methods for RuntimeTarget
 (#54281)

Summary:

# Changelog: [Internal]

This is not used, nor required. The controller is the canonical way of using targets.

Reviewed By: huntie

Differential Revision: D85440639
---
 .../jsinspector-modern/RuntimeTarget.h        | 25 +++++++++----------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/packages/react-native/ReactCommon/jsinspector-modern/RuntimeTarget.h b/packages/react-native/ReactCommon/jsinspector-modern/RuntimeTarget.h
index 236cf83e7de381..a2598d026f83fe 100644
--- a/packages/react-native/ReactCommon/jsinspector-modern/RuntimeTarget.h
+++ b/packages/react-native/ReactCommon/jsinspector-modern/RuntimeTarget.h
@@ -207,19 +207,6 @@ class JSINSPECTOR_EXPORT RuntimeTarget : public EnableExecutorFromThis<RuntimeTa
    */
   std::shared_ptr<RuntimeTracingAgent> createTracingAgent(tracing::TraceRecordingState &state);
 
-  /**
-   * Start sampling profiler for a particular JavaScript runtime.
-   */
-  void enableSamplingProfiler();
-  /**
-   * Stop sampling profiler for a particular JavaScript runtime.
-   */
-  void disableSamplingProfiler();
-  /**
-   * Return recorded sampling profile for the previous sampling session.
-   */
-  tracing::RuntimeSamplingProfile collectSamplingProfile();
-
  private:
   using Domain = RuntimeTargetController::Domain;
 
@@ -275,6 +262,18 @@ class JSINSPECTOR_EXPORT RuntimeTarget : public EnableExecutorFromThis<RuntimeTa
    * session - HostTargetTraceRecording.
    */
   std::weak_ptr<RuntimeTracingAgent> tracingAgent_;
+  /**
+   * Start sampling profiler for a particular JavaScript runtime.
+   */
+  void enableSamplingProfiler();
+  /**
+   * Stop sampling profiler for a particular JavaScript runtime.
+   */
+  void disableSamplingProfiler();
+  /**
+   * Return recorded sampling profile for the previous sampling session.
+   */
+  tracing::RuntimeSamplingProfile collectSamplingProfile();
 
   /**
    * Adds a function with the given name on the runtime's global object, that

From cc46a34d141a04cacd0b52480fc10f3ebbb7dd9f Mon Sep 17 00:00:00 2001
From: Ruslan Lesiutin <hoxy@meta.com>
Date: Wed, 5 Nov 2025 03:12:20 -0800
Subject: [PATCH 2/2] Expose a public getter on a TracingAgent for background
 mode (#54282)

Summary:

# Changelog: [Internal]

It is already in a tracing session state, we are going to use it in RuntimeTarget.

Reviewed By: huntie

Differential Revision: D85440638
---
 .../ReactCommon/jsinspector-modern/RuntimeAgent.h            | 2 +-
 .../jsinspector-modern/tracing/TargetTracingAgent.h          | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/react-native/ReactCommon/jsinspector-modern/RuntimeAgent.h b/packages/react-native/ReactCommon/jsinspector-modern/RuntimeAgent.h
index 7e0b62b442e7ff..74d5c935a5716b 100644
--- a/packages/react-native/ReactCommon/jsinspector-modern/RuntimeAgent.h
+++ b/packages/react-native/ReactCommon/jsinspector-modern/RuntimeAgent.h
@@ -99,7 +99,7 @@ class RuntimeAgent final {
  * Lifetime of this agent is bound to the lifetime of the Tracing session -
  * HostTargetTraceRecording and to the lifetime of the RuntimeTarget.
  */
-class RuntimeTracingAgent : tracing::TargetTracingAgent {
+class RuntimeTracingAgent : public tracing::TargetTracingAgent {
  public:
   explicit RuntimeTracingAgent(tracing::TraceRecordingState &state, RuntimeTargetController &targetController);
 
diff --git a/packages/react-native/ReactCommon/jsinspector-modern/tracing/TargetTracingAgent.h b/packages/react-native/ReactCommon/jsinspector-modern/tracing/TargetTracingAgent.h
index f92ffe7b263156..a1a1260c649437 100644
--- a/packages/react-native/ReactCommon/jsinspector-modern/tracing/TargetTracingAgent.h
+++ b/packages/react-native/ReactCommon/jsinspector-modern/tracing/TargetTracingAgent.h
@@ -27,6 +27,11 @@ class TargetTracingAgent {
     (void)state_;
   }
 
+  bool isRunningInBackgroundMode()
+  {
+    return state_.mode == tracing::Mode::Background;
+  }
+
  protected:
   TraceRecordingState &state_;
 };