P/Invokes should use C types not C++.

src/tests/Interop/DisabledRuntimeMarshalling/AutoLayout.cs

@@ -13,24 +13,18 @@ public unsafe class PInvokes_AutoLayout
     [Fact]
     public static void AutoLayoutStruct()
     {
-        short s = 42;
-        bool b = true;
         Assert.Throws<MarshalDirectiveException>(() => DisabledRuntimeMarshallingNative.CallWithAutoLayoutStruct(new AutoLayoutStruct()));
     }
 
     [Fact]
     public static void StructWithAutoLayoutField()
     {
-        short s = 42;
-        bool b = true;
         AssertThrowsMarshalDirectiveOrTypeLoad(() => DisabledRuntimeMarshallingNative.CallWithAutoLayoutStruct(new SequentialWithAutoLayoutField()));
     }
 
     [Fact]
     public static void StructWithNestedAutoLayoutField()
     {
-        short s = 42;
-        bool b = true;
         AssertThrowsMarshalDirectiveOrTypeLoad(() => DisabledRuntimeMarshallingNative.CallWithAutoLayoutStruct(new SequentialWithAutoLayoutNestedField()));
     }
 
@@ -41,7 +35,7 @@ private static void AssertThrowsMarshalDirectiveOrTypeLoad(Action testCode)
              testCode();
              return;
         }
-        catch (Exception ex) when(ex is MarshalDirectiveException or TypeLoadException)
+        catch (Exception ex) when (ex is MarshalDirectiveException or TypeLoadException)
         {
             return;
         }

src/tests/Interop/DisabledRuntimeMarshalling/DisabledRuntimeMarshallingNative.cpp

@@ -3,14 +3,9 @@
 
 #include <xplatform.h>
 
-// MSVC versions before 19.38 generate incorrect code for this file when compiling with /O2 
-#if defined(_MSC_VER) && (_MSC_VER < 1938)
-#pragma optimize("", off)
-#endif
-
 struct StructWithShortAndBool
 {
-    bool b;
+    BYTE b;
     short s;
     // Make sure we don't have any cases where the native code could return a value of this type one way,
     // but an invalid managed declaration would expect it differently. This ensures that test failures won't be
@@ -24,24 +19,31 @@ struct StructWithWCharAndShort
     WCHAR c;
 };
 
-extern "C" DLL_EXPORT bool STDMETHODCALLTYPE CheckStructWithShortAndBool(StructWithShortAndBool str, short s, bool b)
+extern "C" DLL_EXPORT BYTE STDMETHODCALLTYPE CheckStructWithShortAndBool(StructWithShortAndBool str, short s, BYTE b)
 {
     return str.s == s && str.b == b;
 }
 
-extern "C" DLL_EXPORT bool STDMETHODCALLTYPE CheckStructWithWCharAndShort(StructWithWCharAndShort str, short s, WCHAR c)
+static BOOL STDMETHODCALLTYPE CheckStructWithShortAndBoolMarshalSupport(StructWithShortAndBool str, short s, BYTE b)
 {
-    return str.s == s && str.c == c;
+    return (CheckStructWithShortAndBool(str, s, b) != 0) ? TRUE : FALSE;
 }
 
-using CheckStructWithShortAndBoolCallback = bool (STDMETHODCALLTYPE*)(StructWithShortAndBool, short, bool);
+extern "C" DLL_EXPORT BYTE STDMETHODCALLTYPE CheckStructWithWCharAndShort(StructWithWCharAndShort str, short s, WCHAR c)
+{
+    return str.s == s && str.c == c;
+}
 
-extern "C" DLL_EXPORT CheckStructWithShortAndBoolCallback STDMETHODCALLTYPE GetStructWithShortAndBoolCallback()
+extern "C" DLL_EXPORT void* STDMETHODCALLTYPE GetStructWithShortAndBoolCallback(BYTE marshalSupported)
 {
-    return &CheckStructWithShortAndBool;
+    return (marshalSupported != 0)
+        ? (void*)&CheckStructWithShortAndBoolMarshalSupport
+        : (void*)&CheckStructWithShortAndBool;
 }
 
-extern "C" DLL_EXPORT bool STDMETHODCALLTYPE CallCheckStructWithShortAndBoolCallback(CheckStructWithShortAndBoolCallback cb, StructWithShortAndBool str, short s, bool b)
+using CheckStructWithShortAndBoolCallback = BYTE (STDMETHODCALLTYPE*)(StructWithShortAndBool, short, BYTE);
+
+extern "C" DLL_EXPORT BYTE STDMETHODCALLTYPE CallCheckStructWithShortAndBoolCallback(CheckStructWithShortAndBoolCallback cb, StructWithShortAndBool str, short s, BYTE b)
 {
     return cb(str, s, b);
 }
@@ -54,14 +56,14 @@ extern "C" DLL_EXPORT BYTE PassThrough(BYTE b)
 extern "C" DLL_EXPORT void Invalid(...) {}
 
 
-extern "C" DLL_EXPORT bool STDMETHODCALLTYPE CheckStructWithShortAndBoolWithVariantBool(StructWithShortAndBool str, short s, VARIANT_BOOL b)
+extern "C" DLL_EXPORT BYTE STDMETHODCALLTYPE CheckStructWithShortAndBoolWithVariantBool(StructWithShortAndBool str, short s, VARIANT_BOOL b)
 {
     // Specifically use VARIANT_TRUE here as invalid marshalling (in the "disabled runtime marshalling" case) will incorrectly marshal VARAINT_TRUE
     // but could accidentally marshal VARIANT_FALSE correctly since it is 0, which is the same representation as a zero or sign extension of the C# false value.
     return str.s == s && str.b == (b == VARIANT_TRUE);
 }
 
-using CheckStructWithShortAndBoolWithVariantBoolCallback = bool (STDMETHODCALLTYPE*)(StructWithShortAndBool, short, VARIANT_BOOL);
+using CheckStructWithShortAndBoolWithVariantBoolCallback = BYTE (STDMETHODCALLTYPE*)(StructWithShortAndBool, short, VARIANT_BOOL);
 
 extern "C" DLL_EXPORT CheckStructWithShortAndBoolWithVariantBoolCallback STDMETHODCALLTYPE GetStructWithShortAndBoolWithVariantBoolCallback()
 {

src/tests/Interop/DisabledRuntimeMarshalling/Native_DisabledMarshalling/DisabledRuntimeMarshallingNative.cs → src/tests/Interop/DisabledRuntimeMarshalling/DisabledRuntimeMarshallingNative.cs

@@ -25,7 +25,11 @@ public StructWithShortAndBool(short s, bool b)
 
     public struct StructWithShortAndBoolWithMarshalAs
     {
+#if DISABLE_RUNTIME_MARSHALLING
         [MarshalAs(UnmanagedType.VariantBool)]
+#else
+        [MarshalAs(UnmanagedType.U1)]
+#endif
         bool b;
         short s;
         int padding;
@@ -41,6 +45,10 @@ public StructWithShortAndBoolWithMarshalAs(short s, bool b)
     public struct StructWithWCharAndShort
     {
         short s;
+#if DISABLE_RUNTIME_MARSHALLING
+#else
+        [MarshalAs(UnmanagedType.U2)]
+#endif
         char c;
 
         public StructWithWCharAndShort(short s, char c)
@@ -54,7 +62,11 @@ public StructWithWCharAndShort(short s, char c)
     public struct StructWithWCharAndShortWithMarshalAs
     {
         short s;
+#if DISABLE_RUNTIME_MARSHALLING
         [MarshalAs(UnmanagedType.U1)]
+#else
+        [MarshalAs(UnmanagedType.U2)]
+#endif
         char c;
 
         public StructWithWCharAndShortWithMarshalAs(short s, char c)
@@ -76,6 +88,7 @@ public StructWithShortAndGeneric(short s, T t)
         }
     }
 
+#if DISABLE_RUNTIME_MARSHALLING
     public struct StructWithString
     {
         string s;
@@ -89,6 +102,7 @@ public StructWithString(string s)
     [StructLayout(LayoutKind.Sequential)]
     public class LayoutClass
     {}
+#endif
 
     [StructLayout(LayoutKind.Auto)]
     public struct AutoLayoutStruct
@@ -106,52 +120,142 @@ public struct SequentialWithAutoLayoutNestedField
         SequentialWithAutoLayoutField field;
     }
 
+#if DISABLE_RUNTIME_MARSHALLING
     public enum ByteEnum : byte
     {
         Value = 42
     }
 
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "PassThrough")]
+    public static extern byte GetEnumUnderlyingValue(ByteEnum b);
+#endif
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+#if !DISABLE_RUNTIME_MARSHALLING
+    [return:MarshalAs(UnmanagedType.U1)]
+#endif
     public static extern bool CheckStructWithShortAndBool(StructWithShortAndBool str, short s, bool b);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
-    public static extern bool CheckStructWithShortAndBool(StructWithShortAndBoolWithMarshalAs str, short s, [MarshalAs(UnmanagedType.I4)] bool b);
+#if DISABLE_RUNTIME_MARSHALLING
+    public static extern bool CheckStructWithShortAndBool(StructWithShortAndBoolWithMarshalAs str, short s, bool b);
+#else
+    [return:MarshalAs(UnmanagedType.U1)]
+    public static extern bool CheckStructWithShortAndBool(StructWithShortAndBoolWithMarshalAs str, short s, [MarshalAs(UnmanagedType.Bool)] bool b);
+#endif
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+#if !DISABLE_RUNTIME_MARSHALLING
+    [return:MarshalAs(UnmanagedType.U1)]
+#endif
     public static extern bool CheckStructWithWCharAndShort(StructWithWCharAndShort str, short s, char c);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+#if !DISABLE_RUNTIME_MARSHALLING
+    [return:MarshalAs(UnmanagedType.U1)]
+#endif
     public static extern bool CheckStructWithWCharAndShort(StructWithWCharAndShortWithMarshalAs str, short s, char c);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+#if !DISABLE_RUNTIME_MARSHALLING
+    [return:MarshalAs(UnmanagedType.U1)]
+#endif
     public static extern bool CheckStructWithWCharAndShort(StructWithShortAndGeneric<char> str, short s, char c);
 
     [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+#if !DISABLE_RUNTIME_MARSHALLING
+    [return:MarshalAs(UnmanagedType.U1)]
+#endif
     public static extern bool CheckStructWithWCharAndShort(StructWithShortAndGeneric<short> str, short s, short c);
 
+#if DISABLE_RUNTIME_MARSHALLING
+    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+    public static extern bool CallCheckStructWithShortAndBoolCallback(delegate* unmanaged<StructWithShortAndBool, short, bool, bool> cb, StructWithShortAndBool str, short s, bool b);
+#endif
+
+    public static IntPtr GetStructWithShortAndBoolCallback()
+    {
+#if DISABLE_RUNTIME_MARSHALLING
+        return GetStructWithShortAndBoolCallback(false);
+#else
+        return GetStructWithShortAndBoolCallback(true);
+#endif
+        [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+        static extern IntPtr GetStructWithShortAndBoolCallback([MarshalAs(UnmanagedType.U1)] bool marshalSupported);
+    }
+
+    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+    public static extern IntPtr GetStructWithShortAndBoolWithVariantBoolCallback();
+
+#if DISABLE_RUNTIME_MARSHALLING
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "PassThrough")]
+    public static extern bool GetByteAsBool(byte b);
+#endif
+
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
+    public static extern void CallWithAutoLayoutStruct(AutoLayoutStruct s);
+
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
+    public static extern void CallWithAutoLayoutStruct(SequentialWithAutoLayoutField s);
+
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
+    public static extern void CallWithAutoLayoutStruct(SequentialWithAutoLayoutNestedField s);
+
+#if DISABLE_RUNTIME_MARSHALLING
+    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+    [return:MarshalAs(UnmanagedType.U1)]
+    public static extern bool CheckStructWithShortAndBoolWithVariantBool(StructWithShortAndBool str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
+#else
+    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
+    [return:MarshalAs(UnmanagedType.U1)]
+    public static extern bool CheckStructWithShortAndBoolWithVariantBool(StructWithShortAndBoolWithMarshalAs str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
+#endif
+
+    // Apply the UnmanagedFunctionPointer attributes with the default calling conventions so that Mono's AOT compiler
+    // recognizes that these delegate types are used in interop and should have managed->native thunks generated for them.
+    [UnmanagedFunctionPointer(CallingConvention.Winapi)]
+    public delegate bool CheckStructWithShortAndBoolCallback(StructWithShortAndBool str, short s, bool b);
+
+#if DISABLE_RUNTIME_MARSHALLING
+    [UnmanagedFunctionPointer(CallingConvention.Winapi)]
+    public delegate bool CheckStructWithShortAndBoolWithVariantBoolCallback(StructWithShortAndBool str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
+#else
+    [UnmanagedFunctionPointer(CallingConvention.Winapi)]
+    public delegate bool CheckStructWithShortAndBoolWithMarshalAsAndVariantBoolCallback(StructWithShortAndBoolWithMarshalAs str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
+#endif
+
+    [UnmanagedCallersOnly]
+    public static bool CheckStructWithShortAndBoolManaged(StructWithShortAndBool str, short s, bool b)
+    {
+        return str.s == s && str.b == b;
+    }
+
+#if DISABLE_RUNTIME_MARSHALLING
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid", CharSet = CharSet.Ansi)]
     public static extern void CheckStringWithAnsiCharSet(string s);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid", CharSet = CharSet.Unicode)]
     public static extern void CheckStringWithUnicodeCharSet(string s);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid", CharSet = CharSet.Unicode)]
     public static extern string GetStringWithUnicodeCharSet();
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CheckStructWithStructWithString(StructWithString s);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CheckLayoutClass(LayoutClass c);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid", SetLastError = true)]
     public static extern void CallWithSetLastError();
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     [LCIDConversion(0)]
     public static extern void CallWithLCID();
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid", PreserveSig = false)]
     public static extern int CallWithHResultSwap();
 
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
-    public static extern void CallWithAutoLayoutStruct(AutoLayoutStruct s);
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
-    public static extern void CallWithAutoLayoutStruct(SequentialWithAutoLayoutField s);
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
-    public static extern void CallWithAutoLayoutStruct(SequentialWithAutoLayoutNestedField s);
-
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWithByRef(ref int i);
 
@@ -161,50 +265,28 @@ public enum ByteEnum : byte
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWithInt128(Int128 i);
 
-    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
-    public static extern delegate* unmanaged<StructWithShortAndBool, short, bool, bool> GetStructWithShortAndBoolCallback();
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
-    public static extern delegate* unmanaged<StructWithShortAndBool, short, bool, bool> GetStructWithShortAndBoolWithVariantBoolCallback();
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative))]
-    public static extern bool CallCheckStructWithShortAndBoolCallback(delegate* unmanaged<StructWithShortAndBool, short, bool, bool> cb, StructWithShortAndBool str, short s, bool b);
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "PassThrough")]
-    public static extern bool GetByteAsBool(byte b);
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "PassThrough")]
-    public static extern byte GetEnumUnderlyingValue(ByteEnum b);
-
-    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "CheckStructWithShortAndBoolWithVariantBool")]
-    [return:MarshalAs(UnmanagedType.U1)]
-    public static extern bool CheckStructWithShortAndBoolWithVariantBool_FailureExpected(StructWithShortAndBool str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
+    [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
+    public static extern void CallWithUInt128(UInt128 i);
 
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Nullable<int> s);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Span<int> s);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(ReadOnlySpan<int> ros);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Vector64<int> v);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Vector128<int> v);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Vector256<int> v);
+
     [DllImport(nameof(DisabledRuntimeMarshallingNative), EntryPoint = "Invalid")]
     public static extern void CallWith(Vector<int> v);
-
-    // Apply the UnmanagedFunctionPointer attributes with the default calling conventions so that Mono's AOT compiler
-    // recognizes that these delegate types are used in interop and should have managed->native thunks generated for them.
-    [UnmanagedFunctionPointer(CallingConvention.Winapi)]
-    public delegate bool CheckStructWithShortAndBoolCallback(StructWithShortAndBool str, short s, bool b);
-    [UnmanagedFunctionPointer(CallingConvention.Winapi)]
-    public delegate bool CheckStructWithShortAndBoolWithVariantBoolCallback(StructWithShortAndBool str, short s, [MarshalAs(UnmanagedType.VariantBool)] bool b);
-
-    [UnmanagedCallersOnly]
-    public static bool CheckStructWithShortAndBoolManaged(StructWithShortAndBool str, short s, bool b)
-    {
-        return str.s == s && str.b == b;
-    }
+#endif
 }

src/tests/Interop/DisabledRuntimeMarshalling/DisabledRuntimeMarshalling_Disabled_NativeAssemblyDisabled.csproj

@@ -8,7 +8,9 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="PInvokeAssemblyMarshallingDisabled/*.cs" />
-    <Compile Include="*.cs" />
+    <Compile Include="AutoLayout.cs" />
+    <Compile Include="FunctionPointers.cs" />
+    <Compile Include="RuntimeMarshallingDisabledAttribute.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="Native_DisabledMarshalling/DisabledRuntimeMarshallingNative_DisabledMarshalling.csproj" />

src/tests/Interop/DisabledRuntimeMarshalling/DisabledRuntimeMarshalling_Disabled_NativeAssemblyEnabled.csproj

@@ -6,7 +6,9 @@
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="PInvokeAssemblyMarshallingEnabled/*.cs" />
-    <Compile Include="*.cs" />
+    <Compile Include="AutoLayout.cs" />
+    <Compile Include="FunctionPointers.cs" />
+    <Compile Include="RuntimeMarshallingDisabledAttribute.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="Native_Default/DisabledRuntimeMarshallingNative_Default.csproj" />