chore: import upstream snapshot with attribution

python/paddle/utils/bwd_graph_utils.py

@@ -0,0 +1,33 @@
+# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import paddle
+from paddle.base.wrapped_decorator import signature_safe_contextmanager
+
+from .download import check_and_create_dir
+
+
+@signature_safe_contextmanager
+def capture_backward_subgraph_guard(
+    dump_dir_path: str, need_dump_grad_tensors: bool = False
+):
+    assert dump_dir_path is not None, "The dump_dir_path should not be None"
+    check_and_create_dir(dump_dir_path)
+    paddle.base.core.eager._start_capture_backward_viz_subgraph(
+        dump_dir_path, need_dump_grad_tensors
+    )
+    try:
+        yield
+    finally:
+        paddle.base.core.eager._stop_capture_backward_viz_subgraph()