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Add negative test for creating instances of function pointers #85709

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merged 1 commit into from
May 4, 2023
+18 −6
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Add negative test for creating instances of function pointers #85709

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7 changes: 7 additions & 0 deletions src/libraries/System.Runtime/tests/System/ActivatorTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -198,6 +198,13 @@ public static IEnumerable<object[]> CreateInstance_NoDefaultConstructor_TestData
yield return new object[] { typeof(int[]) };
yield return new object[] { typeof(int).MakeByRefType() };
yield return new object[] { typeof(int).MakePointerType() };

// https://github.com/dotnet/runtime/issues/71095
if (!PlatformDetection.IsMonoRuntime)
{
yield return new object[] { FunctionPointerType() };
static unsafe Type FunctionPointerType() => typeof(delegate*<int, int>);
}
}

[Theory]
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17 changes: 11 additions & 6 deletions src/libraries/System.Runtime/tests/System/Runtime/CompilerServices/RuntimeHelpersTests.cs
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Expand Up @@ -203,8 +203,6 @@ private static void FillStack(int depth)

public static IEnumerable<object[]> GetUninitializedObject_NegativeTestCases()
{
// TODO: Test actual function pointer types when typeof(delegate*<...>) support is available

yield return new[] { typeof(string), typeof(ArgumentException) }; // variable-length type
yield return new[] { typeof(int[]), typeof(ArgumentException) }; // variable-length type
yield return new[] { typeof(int[,]), typeof(ArgumentException) }; // variable-length type
Expand All @@ -227,11 +225,18 @@ public static IEnumerable<object[]> GetUninitializedObject_NegativeTestCases()
yield return new[] { typeof(Delegate), typeof(MemberAccessException) }; // abstract type

yield return new[] { typeof(void), typeof(ArgumentException) }; // explicit block in place
yield return new[] { typeof(int).MakePointerType(), typeof(ArgumentException) }; // pointer typedesc
yield return new[] { typeof(int).MakeByRefType(), typeof(ArgumentException) }; // byref typedesc
yield return new[] { typeof(int).MakePointerType(), typeof(ArgumentException) }; // pointer
yield return new[] { typeof(int).MakeByRefType(), typeof(ArgumentException) }; // byref

// https://github.com/dotnet/runtime/issues/71095
if (!PlatformDetection.IsMonoRuntime)
{
yield return new[] { FunctionPointerType(), typeof(ArgumentException) }; // function pointer
static unsafe Type FunctionPointerType() => typeof(delegate*<void>);
}

yield return new[] { typeof(ReadOnlySpan<int>), typeof(NotSupportedException) }; // byref type
yield return new[] { typeof(ArgIterator), typeof(NotSupportedException) }; // byref type
yield return new[] { typeof(ReadOnlySpan<int>), typeof(NotSupportedException) }; // byref-like type
yield return new[] { typeof(ArgIterator), typeof(NotSupportedException) }; // byref-like type

Type canonType = typeof(object).Assembly.GetType("System.__Canon", throwOnError: false);
if (canonType != null)
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