add more export modules after ertrecod created

Pull Request resolved: #13010

we need to support etrecord recording custom export modules for further usage. This diff makes that happen by creating new function inside ETRecord
ghstack-source-id: 300161197

Differential Revision: [D79279401](https://our.internmc.facebook.com/intern/diff/D79279401/)

Author: Gasoonjia

devtools/etrecord/_etrecord.py

@@ -200,6 +200,38 @@ def _save_edge_dialect_program(
             f"{base_name}_example_inputs", serialized_artifact.example_inputs
         )
 
+    def add_extra_export_modules(
+        self,
+        extra_recorded_export_modules: Dict[
+            str,
+            Union[
+                ExportedProgram,
+                ExirExportedProgram,
+                EdgeProgramManager,
+            ],
+        ],
+    ) -> None:
+        """
+        Add extra export modules to the ETRecord after it has been created.
+
+        This method allows users to add more export modules they want to record
+        to an existing ETRecord instance. The modules will be added to the graph_map
+        and will be included when the ETRecord is saved.
+
+        Args:
+            extra_recorded_export_modules: A dictionary of graph modules with the key being
+                the user provided name and the value being the corresponding exported module.
+                The exported graph modules can be either the output of `torch.export()` or `exir.to_edge()`.
+        """
+        if self.graph_map is None:
+            self.graph_map = {}
+
+        # Now self.graph_map is guaranteed to be non-None
+        graph_map = self.graph_map
+        for module_name, export_module in extra_recorded_export_modules.items():
+            _validate_module_name(module_name)
+            _add_module_to_graph_map(graph_map, module_name, export_module)
+
 
 def _get_reference_outputs(
     bundled_program: BundledProgram,

devtools/etrecord/tests/etrecord_test.py

@@ -252,6 +252,73 @@ def test_etrecord_generation_with_exported_program(self):
             # Validate that export_graph_id matches the expected value
             self.assertEqual(etrecord.export_graph_id, expected_graph_id)
 
+    def test_add_extra_export_modules(self):
+        """Test add_extra_export_modules when ETRecord already has a graph_map."""
+        captured_output, edge_output, et_output = self.get_test_model()
+
+        # Create an ETRecord instance with existing graph_map
+        initial_graph_map = {
+            "existing_module/forward": captured_output.exported_program
+        }
+        etrecord = ETRecord(
+            exported_program=captured_output.exported_program,
+            export_graph_id=id(captured_output.exported_program.graph),
+            edge_dialect_program=edge_output.exported_program,
+            graph_map=initial_graph_map,
+            _debug_handle_map=et_output.debug_handle_map,
+            _delegate_map=et_output.delegate_map,
+        )
+
+        # Verify initial state
+        self.assertIsNotNone(etrecord.graph_map)
+        self.assertIn("existing_module/forward", etrecord.graph_map)
+
+        # Create additional module to add
+        f2 = models.BasicSinMax()
+        captured_output2 = exir.capture(
+            f2, f2.get_random_inputs(), exir.CaptureConfig()
+        )
+
+        extra_modules = {
+            "new_module": captured_output2.exported_program,
+        }
+
+        # Add extra export modules
+        etrecord.add_extra_export_modules(extra_modules)
+
+        # Verify both existing and new modules are present
+        self.assertIn("existing_module/forward", etrecord.graph_map)
+        self.assertIn("new_module/forward", etrecord.graph_map)
+
+        # Verify the modules are correctly stored
+        self.check_graph_closeness(
+            etrecord.graph_map["existing_module/forward"],
+            captured_output.exported_program.graph_module,
+        )
+        self.check_graph_closeness(
+            etrecord.graph_map["new_module/forward"],
+            captured_output2.exported_program.graph_module,
+        )
+
+    def test_add_extra_export_modules_reserved_name_validation(self):
+        """Test that add_extra_export_modules validates reserved names."""
+        captured_output, edge_output, et_output = self.get_test_model()
+
+        etrecord = ETRecord(
+            exported_program=captured_output.exported_program,
+            export_graph_id=id(captured_output.exported_program.graph),
+            edge_dialect_program=edge_output.exported_program,
+            _debug_handle_map=et_output.debug_handle_map,
+            _delegate_map=et_output.delegate_map,
+        )
+
+        # Test that reserved names are rejected
+        for reserved_name in ETRecordReservedFileNames:
+            with self.assertRaises(RuntimeError):
+                etrecord.add_extra_export_modules(
+                    {reserved_name: captured_output.exported_program}
+                )
+
     def test_etrecord_class_constructor_and_save(self):
         """Test that ETRecord class constructor and save method work correctly."""
         captured_output, edge_output, et_output = self.get_test_model()