Build the test tree with TrimMode=full

[MichalStrehovsky]

We're likely losing out on test coverage by not testing the recommended mainstream shipping configuration.

[MichalStrehovsky]

/azp run runtime-nativeaot-outerloop

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Azure Pipelines successfully started running 1 pipeline(s).

[MichalStrehovsky]

/azp run runtime-nativeaot-outerloop

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Azure Pipelines successfully started running 1 pipeline(s).

[MichalStrehovsky]

/azp run runtime-nativeaot-outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[MichalStrehovsky]

@copilot there are some tests that are failing due to trimming under src/tests/Loader/classloader/generics/Variance/IL. The failure is caused by removal of default constructor.

The failure in each of the tests is caused by:

	private static void UnboxUToTInternal<T,U>()
	{
		T t = (T) Activator.CreateInstance(typeof(U));
	}

This method is replicated in many tests.

To fix the failure the methods private static void UnboxUToTInternal<T,U>() need to be annotated like this: private static void UnboxUToTInternal<T, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] U>(). The namespace of the attribute is System.Diagnostics.CodeAnalysis.

The attribute may need to be propagated to each of the callsites too. For example:

	private static void CaseClassUToTWrapper<T,U>()
	{
		UnboxUToTInternal<T,U>();
	}

needs to be annotated as private static void CaseClassUToTWrapper<T, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] U>(). The annotation needs to be applied transitively until the context is no longer generic. Make this change to all tests under src/tests/Loader/classloader/generics/Variance/IL.

[Copilot]

@MichalStrehovsky I've opened a new pull request, #121731, to work on those changes. Once the pull request is ready, I'll request review from you.

[MichalStrehovsky]

@copilot for C# source files under src/tests/Loader/classloader/generics/Variance/IL, find the following method in each of the files: private static void UnboxUToTInternal<T,U>(). Add an attribute like this: private static void UnboxUToTInternal<T, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] U>(). The namespace of the attribute is System.Diagnostics.CodeAnalysis.

[Copilot]

@MichalStrehovsky I've opened a new pull request, #121734, to work on those changes. Once the pull request is ready, I'll request review from you.

[MichalStrehovsky]

@copilot for C# source files under src/tests/Loader/classloader/generics/Variance/IL, find the following method in each of the files: public static bool UIsInstT<T,U>(bool expected). Add an attribute like this: public static bool UIsInstT<T, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicParameterlessConstructor)] U>(bool expected). The namespace of the attribute is System.Diagnostics.CodeAnalysis.

[Copilot]

@MichalStrehovsky I've opened a new pull request, #121833, to work on those changes. Once the pull request is ready, I'll request review from you.