Com trimming related work (dotnet#52940)

* COM related work and native host name changes

* FB

docs/workflow/trimming/feature-switches.md

@@ -21,8 +21,8 @@ configurations but their defaults might vary as any SDK can set the defaults dif
 | CustomResourceTypesSupport | System.Resources.ResourceManager.AllowCustomResourceTypes | Use of custom resource types is disabled when set to false. ResourceManager code paths that use reflection for custom types can be trimmed. |
 | EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization | System.ComponentModel.TypeConverter.EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization | BinaryFormatter serialization support is trimmed when set to false. |
 | BuiltInComInteropSupport | System.Runtime.InteropServices.BuiltInComInterop.IsSupported | Built-in COM support is trimmed when set to false. |
-| EnableCPlusPlusCLIHostActivation | Internal.Runtime.InteropServices.InMemoryAssemblyLoader.IsSupported | C++/CLI host activation code is disabled when set to false and related functionality can be trimmed. |
-| _EnableCallingManagedFunctionFromNativeHosting | Internal.Runtime.InteropServices.ComponentActivator.IsSupported | Getting a managed function from native hosting is disabled when set to false and related functionality can be trimmed. |
+| EnableCppCLIHostActivation | System.Runtime.InteropServices.EnableCppCLIHostActivation | C++/CLI host activation code is disabled when set to false and related functionality can be trimmed. |
+| _EnableConsumingManagedCodeFromNativeHosting | System.Runtime.InteropServices.EnableConsumingManagedCodeFromNativeHosting | Getting a managed function from native hosting is disabled when set to false and related functionality can be trimmed. |
 
 Any feature-switch which defines property can be set in csproj file or
 on the command line as any other MSBuild property. Those without predefined property name

src/coreclr/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.xml

@@ -3,10 +3,10 @@
     <type fullname="System.StartupHookProvider" feature="System.StartupHookProvider.IsSupported" featurevalue="false">
       <method signature="System.Boolean get_IsSupported()" body="stub" value="false" />
     </type>
-    <type fullname="Internal.Runtime.InteropServices.ComponentActivator" feature="Internal.Runtime.InteropServices.ComponentActivator.IsSupported" featurevalue="false">
+    <type fullname="Internal.Runtime.InteropServices.ComponentActivator" feature="System.Runtime.InteropServices.EnableConsumingManagedCodeFromNativeHosting" featurevalue="false">
       <method signature="System.Boolean get_IsSupported()" body="stub" value="false" />
     </type>
-    <type fullname="Internal.Runtime.InteropServices.InMemoryAssemblyLoader" feature="Internal.Runtime.InteropServices.InMemoryAssemblyLoader.IsSupported" featurevalue="false">
+    <type fullname="Internal.Runtime.InteropServices.InMemoryAssemblyLoader" feature="System.Runtime.InteropServices.EnableCppCLIHostActivation" featurevalue="false">
       <method signature="System.Boolean get_IsSupported()" body="stub" value="false" />
     </type>
     <type fullname="System.Runtime.InteropServices.Marshal" feature="System.Runtime.InteropServices.BuiltInComInterop.IsSupported" featurevalue="false">

src/coreclr/System.Private.CoreLib/src/Internal/Runtime/InteropServices/ComponentActivator.cs

@@ -23,7 +23,7 @@ public static class ComponentActivator
 
         private static bool IsSupported { get; } = InitializeIsSupported();
 
-        private static bool InitializeIsSupported() => AppContext.TryGetSwitch("Internal.Runtime.InteropServices.ComponentActivator.IsSupported", out bool isSupported) ? isSupported : true;
+        private static bool InitializeIsSupported() => AppContext.TryGetSwitch("System.Runtime.InteropServices.EnableConsumingManagedCodeFromNativeHosting", out bool isSupported) ? isSupported : true;
 
         public delegate int ComponentEntryPoint(IntPtr args, int sizeBytes);
 

src/coreclr/System.Private.CoreLib/src/Internal/Runtime/InteropServices/InMemoryAssemblyLoader.cs

@@ -14,7 +14,7 @@ public static class InMemoryAssemblyLoader
     {
         private static bool IsSupported { get; } = InitializeIsSupported();
 
-        private static bool InitializeIsSupported() => AppContext.TryGetSwitch("Internal.Runtime.InteropServices.InMemoryAssemblyLoader.IsSupported", out bool isSupported) ? isSupported : true;
+        private static bool InitializeIsSupported() => AppContext.TryGetSwitch("System.Runtime.InteropServices.EnableCppCLIHostActivation", out bool isSupported) ? isSupported : true;
 
         /// <summary>
         /// Loads into an isolated AssemblyLoadContext an assembly that has already been loaded into memory by the OS loader as a native module.

src/coreclr/vm/corelib.h

@@ -68,6 +68,21 @@
 #define DEFINE_FIELD_U(stringName, unmanagedContainingType, unmanagedOffset)
 #endif
 
+//
+// BEGIN_ILLINK_FEATURE_SWITCH and END_ILLINK_FEATURE_SWITCH allow IL linker to guard types behind a feature switch.
+// Current support is only around class scope and not for standalone members of classes.
+// See usage in this file itself and on the link (the assembly name for feature switch in this file will be System.Private.CoreLib),
+// https://github.com/dotnet/designs/blob/main/accepted/2020/feature-switch.md#generate-the-right-input-for-the-linker-in-sdk
+//
+#ifndef BEGIN_ILLINK_FEATURE_SWITCH
+#define BEGIN_ILLINK_FEATURE_SWITCH(featureName, featureValue, featureDefault)
+#endif
+
+#ifndef END_ILLINK_FEATURE_SWITCH
+#define END_ILLINK_FEATURE_SWITCH()
+#endif
+
+
 // NOTE: Make this window really wide if you want to read the table...
 
 DEFINE_CLASS(ACTIVATOR,             System,                 Activator)
@@ -176,6 +191,7 @@ DEFINE_METHOD(CLASS,                GET_PROPERTY_INFO,      GetPropertyInfo,
 DEFINE_METHOD(CLASS,                FORWARD_CALL_TO_INVOKE, ForwardCallToInvokeMember,  IM_Str_BindingFlags_Obj_ArrObj_ArrBool_ArrInt_ArrType_Type_RetObj)
 #endif // FEATURE_COMINTEROP
 
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(BSTR_WRAPPER,          Interop,                BStrWrapper)
 DEFINE_CLASS(CURRENCY_WRAPPER,      Interop,                CurrencyWrapper)
@@ -184,7 +200,9 @@ DEFINE_CLASS(ERROR_WRAPPER,         Interop,                ErrorWrapper)
 DEFINE_CLASS(UNKNOWN_WRAPPER,       Interop,                UnknownWrapper)
 DEFINE_CLASS(VARIANT_WRAPPER,       Interop,                VariantWrapper)
 #endif // FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS_U(System,                 __ComObject,            ComObject)
 DEFINE_FIELD_U(m_ObjectToDataMap,      ComObject,              m_ObjectToDataMap)
@@ -201,6 +219,7 @@ DEFINE_METHOD(LICENSE_INTEROP_PROXY, GETCURRENTCONTEXTINFO,   GetCurrentContextI
 DEFINE_METHOD(LICENSE_INTEROP_PROXY, SAVEKEYINCURRENTCONTEXT, SaveKeyInCurrentContext, IM_IntPtr_RetVoid)
 
 #endif // FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
 DEFINE_CLASS_U(Interop,                CriticalHandle,             CriticalHandle)
 DEFINE_FIELD_U(handle,                     CriticalHandle,     m_handle)
@@ -285,10 +304,6 @@ DEFINE_METHOD(CURRENCY,             DECIMAL_CTOR,           .ctor,
 DEFINE_CLASS(DATE_TIME,             System,                 DateTime)
 DEFINE_METHOD(DATE_TIME,            LONG_CTOR,              .ctor,                      IM_Long_RetVoid)
 
-#ifdef FEATURE_COMINTEROP
-DEFINE_CLASS(DATE_TIME_OFFSET,      System,                 DateTimeOffset)
-#endif // FEATURE_COMINTEROP
-
 DEFINE_CLASS(DECIMAL,               System,                 Decimal)
 DEFINE_METHOD(DECIMAL,              CURRENCY_CTOR,          .ctor,                      IM_Currency_RetVoid)
 
@@ -402,6 +417,7 @@ DEFINE_METHOD(FIELD_INFO,           GET_VALUE,              GetValue,
 
 DEFINE_CLASS(GUID,                  System,                 Guid)
 
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(VARIANT,               System,                 Variant)
 DEFINE_METHOD(VARIANT,              CONVERT_OBJECT_TO_VARIANT,MarshalHelperConvertObjectToVariant,SM_Obj_RefVariant_RetVoid)
@@ -413,6 +429,7 @@ DEFINE_FIELD_U(_objref,             VariantData,            m_objref)
 DEFINE_FIELD_U(_data,               VariantData,            m_data)
 DEFINE_FIELD_U(_flags,              VariantData,            m_flags)
 #endif // FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
 DEFINE_CLASS(IASYNCRESULT,          System,                 IAsyncResult)
 
@@ -431,11 +448,13 @@ DEFINE_CLASS(DYNAMICINTERFACECASTABLEHELPERS,   Interop,   DynamicInterfaceCasta
 DEFINE_METHOD(DYNAMICINTERFACECASTABLEHELPERS,  IS_INTERFACE_IMPLEMENTED,       IsInterfaceImplemented,     SM_IDynamicInterfaceCastable_RuntimeType_Bool_RetBool)
 DEFINE_METHOD(DYNAMICINTERFACECASTABLEHELPERS,  GET_INTERFACE_IMPLEMENTATION,   GetInterfaceImplementation, SM_IDynamicInterfaceCastable_RuntimeType_RetRtType)
 
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(ICUSTOM_QUERYINTERFACE,      Interop,          ICustomQueryInterface)
 DEFINE_METHOD(ICUSTOM_QUERYINTERFACE,     GET_INTERFACE,    GetInterface,               IM_RefGuid_OutIntPtr_RetCustomQueryInterfaceResult)
 DEFINE_CLASS(CUSTOMQUERYINTERFACERESULT,  Interop,          CustomQueryInterfaceResult)
 #endif //FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
 #ifdef FEATURE_COMWRAPPERS
 DEFINE_CLASS(COMWRAPPERS,                 Interop,          ComWrappers)
@@ -467,11 +486,11 @@ DEFINE_METHOD(IREFLECT,             GET_FIELDS,             GetFields,
 DEFINE_METHOD(IREFLECT,             GET_METHODS,            GetMethods,                 IM_BindingFlags_RetArrMethodInfo)
 DEFINE_METHOD(IREFLECT,             INVOKE_MEMBER,          InvokeMember,               IM_Str_BindingFlags_Binder_Obj_ArrObj_ArrParameterModifier_CultureInfo_ArrStr_RetObj)
 
-
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(LCID_CONVERSION_TYPE,  Interop,                LCIDConversionAttribute)
 #endif // FEATURE_COMINTEROP
-
+END_ILLINK_FEATURE_SWITCH()
 
 DEFINE_CLASS(MARSHAL,               Interop,                Marshal)
 #ifdef FEATURE_COMINTEROP
@@ -618,10 +637,11 @@ DEFINE_METHOD(SINGLE,               GET_HASH_CODE,          GetHashCode, IM_RetI
 
 DEFINE_CLASS(__CANON,              System,                 __Canon)
 
-
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(OLE_AUT_BINDER,        System,                 OleAutBinder)
 #endif // FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
 DEFINE_CLASS(MONITOR,               Threading,              Monitor)
 DEFINE_METHOD(MONITOR,              ENTER,                  Enter,                      SM_Obj_RetVoid)
@@ -1060,6 +1080,7 @@ DEFINE_METHOD(ANSIBSTRMARSHALER,    CONVERT_TO_NATIVE,      ConvertToNative,
 DEFINE_METHOD(ANSIBSTRMARSHALER,    CONVERT_TO_MANAGED,     ConvertToManaged,           SM_IntPtr_RetStr)
 DEFINE_METHOD(ANSIBSTRMARSHALER,    CLEAR_NATIVE,           ClearNative,                SM_IntPtr_RetVoid)
 
+BEGIN_ILLINK_FEATURE_SWITCH(System.Runtime.InteropServices.BuiltInComInterop.IsSupported, true, true)
 #ifdef FEATURE_COMINTEROP
 DEFINE_CLASS(OBJECTMARSHALER,       StubHelpers,            ObjectMarshaler)
 DEFINE_METHOD(OBJECTMARSHALER,      CONVERT_TO_NATIVE,      ConvertToNative,            SM_ObjIntPtr_RetVoid)
@@ -1080,6 +1101,7 @@ DEFINE_METHOD(MNGD_SAFE_ARRAY_MARSHALER, CONVERT_SPACE_TO_MANAGED,    ConvertSpa
 DEFINE_METHOD(MNGD_SAFE_ARRAY_MARSHALER, CONVERT_CONTENTS_TO_MANAGED, ConvertContentsToManaged,   SM_IntPtr_RefObj_IntPtr_RetVoid)
 DEFINE_METHOD(MNGD_SAFE_ARRAY_MARSHALER, CLEAR_NATIVE,                ClearNative,                SM_IntPtr_RefObj_IntPtr_RetVoid)
 #endif // FEATURE_COMINTEROP
+END_ILLINK_FEATURE_SWITCH()
 
 DEFINE_CLASS(DATEMARSHALER,         StubHelpers,            DateMarshaler)
 DEFINE_METHOD(DATEMARSHALER,        CONVERT_TO_NATIVE,      ConvertToNative,            SM_DateTime_RetDbl)
@@ -1274,9 +1296,10 @@ DEFINE_FIELD_U(_generationInfo2, GCMemoryInfoData, generationInfo2)
 DEFINE_FIELD_U(_generationInfo3, GCMemoryInfoData, generationInfo3)
 DEFINE_FIELD_U(_generationInfo4, GCMemoryInfoData, generationInfo4)
 
-
 #undef DEFINE_CLASS
 #undef DEFINE_METHOD
 #undef DEFINE_FIELD
 #undef DEFINE_CLASS_U
 #undef DEFINE_FIELD_U
+#undef BEGIN_ILLINK_FEATURE_SWITCH
+#undef END_ILLINK_FEATURE_SWITCH

src/tests/Interop/COM/ComWrappers/API/ComWrappersTestsBuiltInComDisabled.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Program.cs" />
+    <Compile Include="../Common.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="../MockReferenceTrackerRuntime/CMakeLists.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <RuntimeHostConfigurationOption Include="System.Runtime.InteropServices.BuiltInComInterop.IsSupported" Value="false" />
+  </ItemGroup>
+
+</Project>

src/tests/Interop/COM/ComWrappers/GlobalInstance/GlobalInstance.Marshalling.cs

@@ -22,18 +22,37 @@ static int Main(string[] doNotUse)
         {
             try
             {
+                bool builtInComDisabled=false;
+                var comConfig = AppContext.GetData("System.Runtime.InteropServices.BuiltInComInterop.IsSupported");
+                if(comConfig != null && !bool.Parse(comConfig.ToString()))
+                {
+                    builtInComDisabled=true;
+                }
+                Console.WriteLine($"Built-in COM Disabled?: {builtInComDisabled}");
+
+
                 // The first test registers a global ComWrappers instance for marshalling
                 // Subsequents tests assume the global instance has already been registered.
                 ValidateRegisterForMarshalling();
 
                 ValidateMarshalAPIs(validateUseRegistered: true);
-                ValidateMarshalAPIs(validateUseRegistered: false);
+                if(!builtInComDisabled)
+                {
+                    ValidateMarshalAPIs(validateUseRegistered: false);
+                }
 
                 ValidatePInvokes(validateUseRegistered: true);
-                ValidatePInvokes(validateUseRegistered: false);
+                if(!builtInComDisabled)
+                {
+                    ValidatePInvokes(validateUseRegistered: false);
+                }
 
-                ValidateComActivation(validateUseRegistered: true);
-                ValidateComActivation(validateUseRegistered: false);
+                if(!builtInComDisabled)
+                {
+                    // This calls ValidateNativeServerActivation which calls Marshal.GetTypeFromCLSID that is not supported
+                    ValidateComActivation(validateUseRegistered: true);
+                    ValidateComActivation(validateUseRegistered: false);
+                }
 
                 ValidateNotRegisteredForTrackerSupport();
 

src/tests/Interop/COM/ComWrappers/GlobalInstance/GlobalInstanceMarshallingTestsBuiltInComDisabled.csproj

@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <ApplicationManifest>App.manifest</ApplicationManifest>
+    <UseManagedCOMServer>true</UseManagedCOMServer>
+    <IsManagedCOMClient>true</IsManagedCOMClient>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="GlobalInstance.cs" />
+    <Compile Include="GlobalInstance.Marshalling.cs" />
+    <Compile Include="../Common.cs" />
+    <Compile Include="../../ServerContracts/Server.Contracts.cs" />
+    <Compile Include="../../ServerContracts/ServerGuids.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="../MockReferenceTrackerRuntime/CMakeLists.txt" />
+    <ProjectReference Include="../../NativeServer/CMakeLists.txt" />
+    <ProjectReference Include="../../NETServer/NETServer.csproj">
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+      <OutputItemType>Content</OutputItemType>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </ProjectReference>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="CoreShim.X.manifest">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <RuntimeHostConfigurationOption Include="System.Runtime.InteropServices.BuiltInComInterop.IsSupported" Value="false" />
+  </ItemGroup>
+</Project>