onnxruntime

7fdc60e7 - Fix CoreML EP issue with external weight path handling. (#28062)

Fix CoreML EP issue with external weight path handling. (#28062) ### Description <!-- Describe your changes. --> GitHub issue #28005: CoreML EP crashes with SIGBUS when loading a model with external data via CreateSession from a file path. Root Cause In tensorprotoutils.cc:362, TensorProtoWithExternalDataToTensorProto() passes model_path directly to ReadExternalDataForTensor(), but ReadExternalDataForTensor() expects a directory (it joins the path with the external data filename). This causes path construction like /path/to/model.onnx/model.onnx_data instead of /path/to/model.onnx_data. The CPU EP's UnpackInitializerData() at line ~2572 correctly uses model_path.parent_path(). The CoreML EP is the only caller that passes a full model file path (via graph_viewer_.ModelPath() in model_builder.cc:791), triggering the bug. Changes Fix (tensorprotoutils.cc:364): Changed ReadExternalDataForTensor(ten_proto, model_path, ...) to ReadExternalDataForTensor(ten_proto, model_path.parent_path(), ...), matching the pattern used by UnpackInitializerData(). Test (coreml_basic_test.cc:444): Added CoreMLExecutionProviderTest.ExternalDataInitializer — creates a model with external data, saves it to disk, and loads it from a file path with CoreML EP to verify the fix. The test passes with the fix applied. ### Motivation and Context <!-- - Why is this change required? What problem does it solve? - If it fixes an open issue, please link to the issue here. --> #28005 --------- Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>