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### Description This change fixes the DLL delay load problem for the WebGPU EP and DirectML EP. See detailed explanation below. ### Problem When onnxruntime.dll uses delay loading for its dependencies, the dependencies are loaded using `LoadLibraryEx()`, which search the directory of process (.exe) instead of this library (onnxruntime.dll). This is a problem for usages of Node.js binding and python binding, because Windows will try to find the dependencies in the directory of node.exe or python.exe, which is not the directory of onnxruntime.dll. There was previous attempt to fix this by loading DirectML.dll in the initialization of onnxruntime nodejs binding, which works for DML EP but is not a good solution because it does not really "delay" the load. For WebGPU, the situation became worse because webgpu_dawn.dll depends on dxil.dll and dxcompiler.dll, which are explicitly dynamically loaded in the code using `LoadLibraryA()`. This has the same problem of the DLL search. ### Solutions For onnxruntime.dll loading its direct dependencies, it can be resolved by set the [`__pfnDliNotifyHook2` hook](https://learn.microsoft.com/en-us/cpp/build/reference/understanding-the-helper-function?view=msvc-170#structure-and-constant-definitions) to load from an absolute path that constructed from the onnxruntime.dll folder and the DLL name. For webgpu_dawn.dll loading dxil.dll and dxcompiler.dll, since they are explicitly loaded in the code, the hook does not work. Instead, it can be resolved by ~~using WIN32 API `SetDllDirectory()` to add the onnxruntime.dll folder to the search path.~~ preloading the 2 DLLs from the onnxruntime.dll folder . |
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