Conversation
Contributor
|
Is it possible to add a test so we don't regress again? |
eserscor
approved these changes
Feb 23, 2026
tianleiwu
added a commit
that referenced
this pull request
Feb 26, 2026
### Description This PR addresses two issues related to the newly added `DllImportResolver` for `.NET` native library loading: 1. **Fix IL3000 Warning during Native AOT / Single-File Publish** When publishing projects that reference `Microsoft.ML.OnnxRuntime` as a single file or using Native AOT in .NET 9, the compiler reports an `IL3000` warning/error because `DllImportResolver` accesses `Assembly.Location`. In these deployment models, `Assembly.Location` always returns an empty string or throws. Since `DllImportResolver` already correctly handles the empty string failure and falls back to `AppContext.BaseDirectory` (which is fully supported), this PR adds the `[UnconditionalSuppressMessage]` attribute to suppress the build warning statically. 2. **Fix `TypeInitializationException` in `NativeMethods` Static Constructor** Users reported a `System.TypeInitializationException: The type initializer for 'Microsoft.ML.OnnxRuntime.NativeMethods' threw an exception.` when initializing the ONNX Runtime environment. This occurs because the `DllImportResolver` (registered in the static constructor) is invoked on the first P/Invoke (`OrtGetApiBase`). If any API within the resolver throws an unhandled exception (for instance, `AppContext.BaseDirectory` throwing `AppDomainUnloadedException` in sandboxed AppDomains or `Environment.GetEnvironmentVariable` throwing `SecurityException`), the exception bubbles up and crashes the application with a type initialization failure. This PR wraps the `DllImportResolver` logic in a `try-catch` block (specifically handling `AppContext.BaseDirectory` edge cases) so that any resolution failure safely swallows the error and falls back to `IntPtr.Zero`, allowing the default .NET Platform Invoke mechanism to take over and throw a standard `DllNotFoundException` instead of a fatal type initialization crash. A unit test (`TestDllImportResolverDoesNotThrow`) has been added to `OrtEnvTests.cs` to verify that `DllImportResolver` successfully swallows internal exceptions without crashing the initialization process. ### Motivation and Context These changes ensure that .NET developers can safely compile Native AOT/Single-File applications without build errors and prevent hard application crashes in environments with restricted permissions.
tianleiwu
added a commit
that referenced
this pull request
Feb 27, 2026
This cherry-picks the following commits for the release: | Commit ID | PR Number | Commit Title | |-----------|-----------|-------------| | decd177 | #27090 | Fix GatherND division by zero when batch dimensions mismatch | | 55f8234 | #27360 | Fix QMoE CPU Operator | | df9146f | #27403 | [MLAS] Adding DynamicQGemm function pointers and ukernel interface | | 0f93853 | #27318 | [js/web] Use embedded WASM module in Blob URL workers when wasmBinary is provided | | b2a6e69 | #27364 | QMoE CPU Performance Update (Up to 4x on 4-bit) | | f501e1d | #27413 | Fix refcount bug in map input conversion that caused shutdown segfault | | b32b205 | #27421 | Fix error where bytes is not assigned for dynamic qgemm pack b size | | 426b006 | #27397 | Fix DllImportResolver | | 0982844 | #27412 | MatmulNBits prepacking scales fix | | 9afb0d2 | #27430 | Fix validation for external data paths for models loaded from bytes | | 71d2cd0 | #27401 | Enable Python 3.14 CI and Upgrade Dependencies | | 79e0676 | #27419 | fix: out of bounds access for resize operation | | 82eb99c | #27459 | Fix SkipLayerNorm fusion incorrectly applied when gamma/beta are not 1D | | 355278a | #27444 | Fix GatherCopyData Integer Truncation Leading to Heap Out-of-Bounds Read/Write | | cf96123 | #27411 | [web] fix usage of wasmBinary together with a blob URL for .mjs | | 1131a86 | #27399 | [web] remove the unhelpful "Unknown CPU vendor" warning. | | ffbbc4f | #27316 | Build Windows ARM64X binaries as part of packaging pipeline | --------- Signed-off-by: Jonathan Clohessy <Jonathan.Clohessy@arm.com> Co-authored-by: patryk-kaiser-ARM <patryk.kaiser@arm.com> Co-authored-by: don <70039285+0-don@users.noreply.github.com> Co-authored-by: Jonathan Clohessy <jonathan.clohessy@arm.com> Co-authored-by: Hariharan Seshadri <shariharan91@gmail.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Adrian Lizarraga <adlizarraga@microsoft.com> Co-authored-by: Lukas Folle <126877803+lukas-folle-snkeos@users.noreply.github.com> Co-authored-by: Chi Lo <54722500+chilo-ms@users.noreply.github.com> Co-authored-by: Yulong Wang <7679871+fs-eire@users.noreply.github.com> Co-authored-by: Chaya <cha182350@gmail.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com> Co-authored-by: Erik <erscor@microsoft.com> Co-authored-by: Edward Chen <18449977+edgchen1@users.noreply.github.com>
This was referenced Mar 9, 2026
This was referenced Mar 17, 2026
This was referenced Mar 30, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Description
This PR addresses two issues related to the newly added
DllImportResolverfor.NETnative library loading:Fix IL3000 Warning during Native AOT / Single-File Publish
When publishing projects that reference
Microsoft.ML.OnnxRuntimeas a single file or using Native AOT in .NET 9, the compiler reports anIL3000warning/error becauseDllImportResolveraccessesAssembly.Location. In these deployment models,Assembly.Locationalways returns an empty string or throws.Since
DllImportResolveralready correctly handles the empty string failure and falls back toAppContext.BaseDirectory(which is fully supported), this PR adds the[UnconditionalSuppressMessage]attribute to suppress the build warning statically.Fix
TypeInitializationExceptioninNativeMethodsStatic ConstructorUsers reported a
System.TypeInitializationException: The type initializer for 'Microsoft.ML.OnnxRuntime.NativeMethods' threw an exception.when initializing the ONNX Runtime environment.This occurs because the
DllImportResolver(registered in the static constructor) is invoked on the first P/Invoke (OrtGetApiBase). If any API within the resolver throws an unhandled exception (for instance,AppContext.BaseDirectorythrowingAppDomainUnloadedExceptionin sandboxed AppDomains orEnvironment.GetEnvironmentVariablethrowingSecurityException), the exception bubbles up and crashes the application with a type initialization failure.This PR wraps the
DllImportResolverlogic in atry-catchblock (specifically handlingAppContext.BaseDirectoryedge cases) so that any resolution failure safely swallows the error and falls back toIntPtr.Zero, allowing the default .NET Platform Invoke mechanism to take over and throw a standardDllNotFoundExceptioninstead of a fatal type initialization crash.A unit test (
TestDllImportResolverDoesNotThrow) has been added toOrtEnvTests.csto verify thatDllImportResolversuccessfully swallows internal exceptions without crashing the initialization process.Motivation and Context
These changes ensure that .NET developers can safely compile Native AOT/Single-File applications without build errors and prevent hard application crashes in environments with restricted permissions.