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Fix file cloning on .NET 11 - #58
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Andy Gerlicher (AndyGerlicher) merged 1 commit intoAug 14, 2026
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Use the native HANDLE layout for DUPLICATE_EXTENTS_DATA and explicitly protect the SafeFileHandle while its raw value is passed to DeviceIoControl. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
David Federman (dfederm)
approved these changes
Aug 13, 2026
Andy Gerlicher (AndyGerlicher)
enabled auto-merge (squash)
August 13, 2026 22:19
David Federman (dfederm)
approved these changes
Aug 14, 2026
Andy Gerlicher (AndyGerlicher)
disabled auto-merge
August 14, 2026 00:26
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Summary
DUPLICATE_EXTENTS_DATA.FileHandleas the nativeHANDLE(IntPtr) in a normal blittable structSafeFileHandlewithDangerousAddRef/DangerousReleasewhile its raw value is used byDeviceIoControlContext
.NET 11 moved structure/array marshalling into managed generic helpers. The existing byref-like, non-blittable
DUPLICATE_EXTENTS_DATAshape fails while constructingSystem.StubHelpers.IArrayMarshaler<...>, beforeDeviceIoControlis called. The new structure matches the Win32 ABI and works across .NET 10 and .NET 11.Validation
dotnet build --configuration Release --no-restore(0 warnings/errors; producedCopyOnWrite.0.5.1.nupkg)DuplicateExtentsDataMatchesWin32Layoutunit test