Support recording inplace op intermediate output

codegen/gen.py

@@ -309,8 +309,8 @@ def __call__(
         internal::EventTracerProfileOpScope event_tracer_op_scope(context.internal_event_tracer(), "native_call_{f.func.name}");
         EXECUTORCH_SCOPE_PROF("native_call_{f.func.name}");
         {ret_prefix}{kernel_call}(context, {args_str});
-        {event_tracer_output_logging}
         {return_assignment}
+        {event_tracer_output_logging}
 {exception_boundary_end}
     }}
 ),

codegen/test/test_executorch_gen.py

@@ -516,9 +516,9 @@ def test_codegen_unboxed_specialized(self) -> None:
         internal::EventTracerProfileOpScope event_tracer_op_scope(context.internal_event_tracer(), "native_call_op_1");
         EXECUTORCH_SCOPE_PROF("native_call_op_1");
         bool result_ = at::native::default_kernel(context, );
+        *stack[0] = EValue(result_);
         internal::event_tracer_log_evalue(context.internal_event_tracer(), *stack[0]);
 
-        *stack[0] = EValue(result_);
 
     }
 ),
@@ -615,9 +615,9 @@ def test_codegen_unboxed_default(self) -> None:
         internal::EventTracerProfileOpScope event_tracer_op_scope(context.internal_event_tracer(), "native_call_op_1");
         EXECUTORCH_SCOPE_PROF("native_call_op_1");
         bool result_ = at::native::default_kernel(context, );
+        *stack[0] = EValue(result_);
         internal::event_tracer_log_evalue(context.internal_event_tracer(), *stack[0]);
 
-        *stack[0] = EValue(result_);
 
     }
 ),
@@ -642,9 +642,9 @@ def test_codegen_unboxed_default(self) -> None:
         internal::EventTracerProfileOpScope event_tracer_op_scope(context.internal_event_tracer(), "native_call_op_1");
         EXECUTORCH_SCOPE_PROF("native_call_op_1");
         bool result_ = at::native::default_kernel(context, );
+        *stack[0] = EValue(result_);
         internal::event_tracer_log_evalue(context.internal_event_tracer(), *stack[0]);
 
-        *stack[0] = EValue(result_);
         } catch (const std::exception& ex) {
           ET_LOG(Error, "Kernel threw an exception: %s", ex.what());
           context.fail(torch::executor::Error::Internal);
@@ -686,9 +686,9 @@ def test_codegen_unboxed_default_kernel_key_selected(self) -> None:
         internal::EventTracerProfileOpScope event_tracer_op_scope(context.internal_event_tracer(), "native_call_op_1");
         EXECUTORCH_SCOPE_PROF("native_call_op_1");
         bool result_ = at::native::default_kernel(context, );
+        *stack[0] = EValue(result_);
         internal::event_tracer_log_evalue(context.internal_event_tracer(), *stack[0]);
 
-        *stack[0] = EValue(result_);
 
     }
 ),

devtools/etdump/etdump_flatcc.cpp

@@ -714,6 +714,14 @@ Result<long> ETDumpGen::write_tensor_or_return_error(Tensor tensor) {
     return static_cast<size_t>(-1);
   }
 
+  // A tensor with nbytes > 0 but null data pointer indicates a corrupt PTE
+  // or a bug in the system. This should not happen in normal operation.
+  ET_CHECK_OR_RETURN_ERROR(
+      tensor.const_data_ptr() != nullptr,
+      InvalidState,
+      "Tensor has nbytes=%zu but null data pointer. This indicates a corrupt program or internal error.",
+      tensor.nbytes());
+
   if (!data_sink_) {
     return Error::InvalidArgument;
   }

devtools/inspector/tests/inspector_test.py

@@ -58,12 +58,30 @@
     to_edge,
     to_edge_transform_and_lower,
 )
+from executorch.exir.capture._config import ExecutorchBackendConfig
 from executorch.extension.pybindings.portable_lib import (
     _load_for_executorch_from_buffer,
 )
 from torch.export import export, ExportedProgram
 
 
+# Models for testing inplace ops intermediate output logging
+class IndexPutModel(torch.nn.Module):
+    """
+    A model that uses index_put to update a tensor at specific indices.
+    When the reinplace_pass is enabled, this will be converted to index_put_
+    (the inplace variant), which was causing issues with event tracer logging.
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.register_buffer("data", torch.zeros(5, 3))
+
+    def forward(self, indices: torch.Tensor, values: torch.Tensor) -> torch.Tensor:
+        result = self.data.index_put((indices,), values)
+        return result.sum()
+
+
 OP_TYPE = "aten::add"
 EVENT_BLOCK_NAME = "block_0"
 EVENTS_SIZE = 10
@@ -1788,3 +1806,238 @@ def _gen_random_events(self) -> List[Event]:
                 )
             )
         return events
+
+
+class TestInplaceOpsIntermediateOutput(unittest.TestCase):
+    """
+    Test suite for verifying that inplace operators correctly log intermediate
+    outputs when the event tracer is enabled.
+
+    This validates the fix for an issue where inplace ops converted by the
+    reinplace_pass could cause logging errors because the output tensor's data
+    pointer was null at the time of logging.
+
+    Note: The reinplace_pass currently only supports converting index_put to
+    index_put_ (see executorch/exir/passes/reinplace.py).
+    """
+
+    def _run_model_and_get_inspector(
+        self,
+        model: torch.nn.Module,
+        example_inputs: tuple,
+        run_reinplace_pass: bool = True,
+    ) -> Inspector:
+        """
+        Helper method to export a model, run it with event tracing, and return
+        an Inspector instance for verifying intermediate outputs.
+        """
+        model.eval()
+
+        with tempfile.TemporaryDirectory() as tmp_dir:
+            model_path = os.path.join(tmp_dir, "model.pte")
+            etrecord_path = os.path.join(tmp_dir, "etrecord.bin")
+            etdump_path = os.path.join(tmp_dir, "etdump.etdp")
+            debug_buffer_path = os.path.join(tmp_dir, "debug_buffer.bin")
+
+            # Step 1: Export the model
+            exported_program = export(model, example_inputs)
+            self.assertIsNotNone(exported_program)
+
+            # Step 2: Convert to edge dialect
+            edge_compile_config = EdgeCompileConfig(_check_ir_validity=False)
+            edge_program = to_edge(exported_program, compile_config=edge_compile_config)
+            self.assertIsNotNone(edge_program)
+
+            # Keep a copy for etrecord
+            edge_program_copy = to_edge(
+                export(model, example_inputs), compile_config=edge_compile_config
+            )
+
+            # Step 3: Convert to executorch with reinplace_pass enabled
+            executorch_config = ExecutorchBackendConfig(
+                run_reinplace_pass=run_reinplace_pass
+            )
+            executorch_program = edge_program.to_executorch(config=executorch_config)
+            self.assertIsNotNone(executorch_program)
+
+            # Step 4: Generate ETRecord
+            generate_etrecord(
+                etrecord_path,
+                edge_program_copy,
+                executorch_program,
+            )
+
+            # Step 5: Save the PTE file
+            with open(model_path, "wb") as f:
+                executorch_program.write_to_file(f)
+
+            # Step 6: Load and run with event tracing enabled
+            with open(model_path, "rb") as f:
+                pte_buffer = f.read()
+
+            executorch_module = _load_for_executorch_from_buffer(
+                pte_buffer,
+                enable_etdump=True,
+                debug_buffer_size=1024 * 1024,  # 1MB for testing
+            )
+            self.assertIsNotNone(executorch_module)
+
+            # Run the model
+            import torch.utils._pytree as pytree
+
+            flattened_inputs = pytree.tree_flatten(example_inputs)[0]
+            executorch_module.run_method("forward", tuple(flattened_inputs))
+
+            # Write ETDump results
+            executorch_module.write_etdump_result_to_file(
+                etdump_path, debug_buffer_path
+            )
+
+            # Check if event tracer captured data
+            if not os.path.exists(etdump_path):
+                self.skipTest(
+                    "Event tracer not enabled. Run with --config executorch.event_tracer_enabled=true"
+                )
+
+            # Step 7: Create Inspector and return
+            inspector = Inspector(
+                etdump_path=etdump_path,
+                etrecord=etrecord_path,
+                debug_buffer_path=debug_buffer_path,
+            )
+            return inspector
+
+    def test_index_put_without_reinplace_pass(self):
+        """
+        Test that the model works correctly without the reinplace pass as a
+        baseline comparison, and verify intermediate output correctness.
+        """
+        model = IndexPutModel()
+        indices = torch.tensor([0, 2, 4])
+        values = torch.tensor([[1.0, 2.0, 3.0], [4.0, 5.0, 6.0], [7.0, 8.0, 9.0]])
+        example_inputs = (indices, values)
+
+        # Compute expected intermediate output of index_put
+        # index_put on zeros(5,3) with indices [0,2,4] and values [[1,2,3],[4,5,6],[7,8,9]]
+        # Result should be:
+        # [[1, 2, 3],
+        #  [0, 0, 0],
+        #  [4, 5, 6],
+        #  [0, 0, 0],
+        #  [7, 8, 9]]
+        expected_index_put_output = torch.zeros(5, 3)
+        expected_index_put_output[0] = torch.tensor([1.0, 2.0, 3.0])
+        expected_index_put_output[2] = torch.tensor([4.0, 5.0, 6.0])
+        expected_index_put_output[4] = torch.tensor([7.0, 8.0, 9.0])
+
+        inspector = self._run_model_and_get_inspector(
+            model, example_inputs, run_reinplace_pass=False
+        )
+
+        self.assertIsNotNone(inspector)
+        self.assertGreater(len(inspector.event_blocks), 0)
+
+        # Verify intermediate output correctness (same validation as with reinplace)
+        found_index_put_output = False
+        for event_block in inspector.event_blocks:
+            for event in event_block.events:
+                if hasattr(event, "debug_data") and event.debug_data is not None:
+                    for debug_entry in event.debug_data:
+                        if isinstance(debug_entry, torch.Tensor):
+                            # Verify tensor has valid data pointer
+                            self.assertIsNotNone(
+                                debug_entry.data_ptr(),
+                                "Intermediate output tensor should have valid data pointer",
+                            )
+                            self.assertNotEqual(
+                                debug_entry.data_ptr(),
+                                0,
+                                "Intermediate output tensor data pointer should not be null",
+                            )
+
+                            # Check if this matches our expected index_put output shape
+                            if debug_entry.shape == expected_index_put_output.shape:
+                                if torch.allclose(
+                                    debug_entry, expected_index_put_output, atol=1e-5
+                                ):
+                                    found_index_put_output = True
+
+        self.assertTrue(
+            found_index_put_output,
+            "Expected to find index_put intermediate output with correct tensor data (without reinplace pass).",
+        )
+
+    def test_index_put_intermediate_output_data_correctness(self):
+        """
+        Test that the intermediate output values captured by the event tracer
+        are valid tensors with correct data.
+
+        This specifically validates that:
+        1. The output tensor has a valid (non-null) data pointer
+        2. The output tensor contains the correct values after index_put_
+        """
+        model = IndexPutModel()
+        # Use simple values to verify correctness
+        indices = torch.tensor([0, 1])
+        values = torch.tensor([[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]])
+        example_inputs = (indices, values)
+
+        # Compute expected intermediate output of index_put
+        # index_put on zeros(5,3) with indices [0,1] and values [[1,2,3],[4,5,6]]
+        # Result should be:
+        # [[1, 2, 3],
+        #  [4, 5, 6],
+        #  [0, 0, 0],
+        #  [0, 0, 0],
+        #  [0, 0, 0]]
+        expected_index_put_output = torch.zeros(5, 3)
+        expected_index_put_output[0] = torch.tensor([1.0, 2.0, 3.0])
+        expected_index_put_output[1] = torch.tensor([4.0, 5.0, 6.0])
+
+        inspector = self._run_model_and_get_inspector(
+            model, example_inputs, run_reinplace_pass=True
+        )
+
+        self.assertIsNotNone(inspector)
+        self.assertGreater(len(inspector.event_blocks), 0)
+
+        total_events = sum(len(eb.events) for eb in inspector.event_blocks)
+        self.assertGreater(
+            total_events, 0, "Expected at least one event to be captured"
+        )
+
+        # Find and verify the index_put_ output
+        found_index_put_output = False
+        for event_block in inspector.event_blocks:
+            for event in event_block.events:
+                # Check if this event has debug_data (intermediate outputs)
+                if hasattr(event, "debug_data") and event.debug_data is not None:
+                    for debug_entry in event.debug_data:
+                        if isinstance(debug_entry, torch.Tensor):
+                            # Verify tensor has valid data pointer
+                            self.assertIsNotNone(
+                                debug_entry.data_ptr(),
+                                "Intermediate output tensor should have valid data pointer",
+                            )
+                            self.assertNotEqual(
+                                debug_entry.data_ptr(),
+                                0,
+                                "Intermediate output tensor data pointer should not be null",
+                            )
+
+                            # Check if this matches our expected index_put output shape
+                            if debug_entry.shape == expected_index_put_output.shape:
+                                # Verify the data is correct
+                                if torch.allclose(
+                                    debug_entry, expected_index_put_output, atol=1e-5
+                                ):
+                                    found_index_put_output = True
+
+        # Assert that we found the expected index_put output with correct data
+        # This validates that the intermediate output was properly logged
+        # and contains the correct tensor values
+        self.assertTrue(
+            found_index_put_output,
+            "Expected to find index_put intermediate output with correct tensor data. "
+            "The output tensor should match the expected result of index_put operation.",
+        )