Make specifying just DllImportSearchPath.AssemblyDirectory only search in assembly directory
#114756
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Pull Request Overview
This PR updates the runtime behavior so that specifying only DllImportSearchPath.AssemblyDirectory limits native library lookup to the assembly directory without falling back to OS search paths. Key changes include:
- Updating tests to validate the no-fallback scenario.
- Propagating a new user-specified flag in the native library lookup code across mono, coreclr, and NativeAOT.
- Adjusting function signatures and conditional logic to differentiate explicit from default search flag behavior.
Reviewed Changes
Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| src/tests/Interop/DllImportSearchPaths/DllImportSearchPathsTest.cs | Updated test name and assertions to verify no fallback to OS search. |
| src/mono/mono/metadata/native-library.c | Modified function signatures and conditions to track user-specified flags. |
| src/coreclr/vm/nativelibrary.cpp | Updated API and inline logic to separately pass user-specified flag information. |
| src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtime/InteropServices/NativeLibrary.NativeAot.cs | Adjusted method signatures and parameter handling to propagate the new flag. |
| src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/CompilerHelpers/InteropHelpers.cs | Passed the additional flag for DllImportSearchPath in helper functions. |
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This was referenced Apr 18, 2025
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...tiveaot/System.Private.CoreLib/src/System/Runtime/InteropServices/NativeLibrary.NativeAot.cs
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Co-authored-by: Aaron Robinson <arobins@microsoft.com>
This was referenced Apr 21, 2025
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...tiveaot/System.Private.CoreLib/src/System/Runtime/InteropServices/NativeLibrary.NativeAot.cs
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Update coreclr, mono, and nativeaot to treat specifying only
DllImportSearchPath.AssemblyDirectoryas only searching the assembly directory - no fallback to the OS search behaviour.Since the default behaviour (search assembly directory and then fall back to the OS search) is represented with the same flags/values as if the user specified only
DllImportSearchPath.AssemblyDirectory, this implementation tracks whether the flags were user-specified.Fixes #107040