MonoInterp/Minijit win-x64: COM interop (SafeArray/Variant/struct reverse-pinvoke) test failures

[pavelsavara]

Summary

The COM/marshalling interop tests listed below fail on the Mono Minijit, windows-x64 runtime-test leg (DOTNET_RUNTIME_VARIANT=minijit). They were first observed on the emsdk-upgrade PR #129299, but Minijit does not use LLVM, so these failures are independent of the emsdk/LLVM toolchain bump and appear to be pre-existing Mono win-x64 interop gaps. They are disabled with [ActiveIssue(..., TestRuntimes.Mono)] referencing this issue (originally bucketed under #84398, now split out).

Configuration

• Pipeline: runtime (129), build 1469112, PR Upgrade emsdk to 5.0.6 #129299, merge SHA a89b967
• Leg: windows-x64 Release AllSubsets_Mono_Minijit_RuntimeTests minijit
• RuntimeFlavor: Mono · DOTNET_RUNTIME_VARIANT=minijit · arch x64 · OS windows
• AzDO "Send to Helix (Windows)" log: build 1469112 / log 1428
• Helix job: 854d202d-1001-46ed-b32d-69a07704e193
• Helix Interop work item console: https://helix.dot.net/api/2019-06-17/jobs/854d202d-1001-46ed-b32d-69a07704e193/workitems/Interop/console

Failures

1. SafeArray multidimensional marshalling — NullReferenceException

src/tests/Interop/ArrayMarshalling/SafeArray/SafeArrayTest.cs:

• SafeArrayMarshallingTest.MultidimensionalIntArray
• SafeArrayMarshallingTest.MultidimensionalBoolArray
• SafeArrayMarshallingTest.MultidimensionalStringArray
• SafeArrayMarshallingTest.MultidimensionalStringArrayRoundTrip

18:25:57.224 Running test: global::SafeArrayMarshallingTest.MultidimensionalIntArray()
System.NullReferenceException: Object reference not set to an instance of an object
   at SafeArrayMarshallingTest.MultidimensionalIntArray()
   at Program.<<Main>$>g__TestExecutor1|0_2(StreamWriter tempLogSw, StreamWriter statsCsvSw, <>c__DisplayClass0_0&)
18:25:57.298 Failed test: global::SafeArrayMarshallingTest.MultidimensionalIntArray()

(The ...IntArrayRoundTrip and ...BoolArrayRoundTrip variants pass; the four listed above throw NullReferenceException.)

2. Variant marshalling — MarshalDirectiveException: Marshalling of type object is not implemented

Test assemblies VariantTest, VariantTestBuiltInComDisabled, VariantTestComWrappers (entry points in src/tests/Interop/PInvoke/Variant/VariantTest.BuiltInCom.cs and VariantTest.ComWrappers.cs):

18:25:57.426 Running test: Interop\PInvoke\Variant\VariantTest\VariantTest.dll
Built-in COM Disabled?: False
Test failed: System.Runtime.InteropServices.MarshalDirectiveException: Marshalling of type object is not implemented
   at Test_VariantTest.TestByValue(Boolean hasComSupport)
   at Test_VariantTest.TestEntryPoint()
Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: 100
Actual:   101

3. DelegatePInvoke (struct by-ref, Cdecl) — Assert.True() failure

src/tests/Interop/StructMarshalling/ReversePInvoke/MarshalExpStruct/DelegatePInvoke/DelegatePInvokeTest.cs
(Interop\StructMarshalling\ReversePInvoke\MarshalExpStruct\DelegatePInvoke\DelegatePInvokeTest):

Delegate,Pinvoke,By Ref,Cdecl
Calling Get_MarshalStructAsParam_AsExpByRefINNER2_Cdecl_FuncPtr...
Test Failure: Xunit.Sdk.TrueException: Assert.True() Failure
Expected: True
...
Expected: 100
Actual: 101
END EXECUTION - FAILED

4. ReversePInvoke (struct by-ref, Cdecl) — wrong callback result

src/tests/Interop/StructMarshalling/ReversePInvoke/MarshalExpStruct/ReversePInvokeManaged/ReversePInvokeTest.cs
(Interop\StructMarshalling\ReversePInvoke\MarshalExpStruct\ReversePInvokeManaged\ReversePInvokeTest):

Reverse,Pinvoke,By Ref,Cdecl
        FAILED! TestMethod_DoCallBack_MarshalStructByRef_INNER2_Cdecl did not receive result as expected.
        The Actual is...
        INNER2.f1 = 77
        INNER2.f2 = 77
...
Xunit.Sdk.TrueException
Expected: 100
Actual: 101

Disabled in

All marked [ActiveIssue("https://github.com/dotnet/runtime/issues/<this-issue>", TestRuntimes.Mono)] on PR #129299.

Note

This issue body was generated with the assistance of GitHub Copilot.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/interop-contrib
See info in area-owners.md if you want to be subscribed.