[NativeAOT] Miscellaneous cleanup

src/coreclr/nativeaot/Runtime.Base/src/System/Runtime/MethodTable.Runtime.cs

@@ -11,42 +11,29 @@ namespace Internal.Runtime
     // Extensions to MethodTable that are specific to the use in Runtime.Base.
     internal unsafe partial struct MethodTable
     {
-#pragma warning disable CA1822
+#if !INPLACE_RUNTIME
         internal MethodTable* GetArrayEEType()
         {
-#if INPLACE_RUNTIME
-            return MethodTable.Of<Array>();
-#else
             MethodTable* pThis = (MethodTable*)Unsafe.Pointer(ref this);
             void* pGetArrayEEType = InternalCalls.RhpGetClasslibFunctionFromEEType(pThis, ClassLibFunctionId.GetSystemArrayEEType);
             return ((delegate* <MethodTable*>)pGetArrayEEType)();
-#endif
         }
 
         internal Exception GetClasslibException(ExceptionIDs id)
         {
-#if INPLACE_RUNTIME
-            return RuntimeExceptionHelpers.GetRuntimeException(id);
-#else
             if (IsParameterizedType)
             {
                 return RelatedParameterType->GetClasslibException(id);
             }
 
             return EH.GetClasslibExceptionFromEEType(id, (MethodTable*)Unsafe.AsPointer(ref this));
-#endif
         }
-#pragma warning restore CA1822
+#endif
 
         internal IntPtr GetClasslibFunction(ClassLibFunctionId id)
         {
             return (IntPtr)InternalCalls.RhpGetClasslibFunctionFromEEType((MethodTable*)Unsafe.AsPointer(ref this), id);
         }
-
-        internal static bool AreSameType(MethodTable* mt1, MethodTable* mt2)
-        {
-            return mt1 == mt2;
-        }
     }
 
     internal static class WellKnownEETypes

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Reflection/Core/Execution/ExecutionDomain.cs

@@ -117,27 +117,27 @@ public Type GetNamedTypeForHandle(RuntimeTypeHandle typeHandle)
 
         public Type GetArrayTypeForHandle(RuntimeTypeHandle typeHandle)
         {
-            RuntimeTypeHandle elementTypeHandle = ExecutionEnvironment.GetArrayTypeElementType(typeHandle);
+            RuntimeTypeHandle elementTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(typeHandle);
             return elementTypeHandle.GetTypeForRuntimeTypeHandle().GetArrayType(typeHandle);
         }
 
         public Type GetMdArrayTypeForHandle(RuntimeTypeHandle typeHandle, int rank)
         {
-            RuntimeTypeHandle elementTypeHandle = ExecutionEnvironment.GetArrayTypeElementType(typeHandle);
+            RuntimeTypeHandle elementTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(typeHandle);
             return elementTypeHandle.GetTypeForRuntimeTypeHandle().GetMultiDimArrayType(rank, typeHandle);
         }
 
         public Type GetPointerTypeForHandle(RuntimeTypeHandle typeHandle)
         {
-            RuntimeTypeHandle targetTypeHandle = ExecutionEnvironment.GetPointerTypeTargetType(typeHandle);
+            RuntimeTypeHandle targetTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(typeHandle);
             return targetTypeHandle.GetTypeForRuntimeTypeHandle().GetPointerType(typeHandle);
         }
 
         public Type GetFunctionPointerTypeForHandle(RuntimeTypeHandle typeHandle)
         {
-            ExecutionEnvironment.GetFunctionPointerTypeComponents(typeHandle, out RuntimeTypeHandle returnTypeHandle,
-                                                                              out RuntimeTypeHandle[] parameterHandles,
-                                                                              out bool isUnmanaged);
+            RuntimeTypeHandle returnTypeHandle = RuntimeAugments.GetFunctionPointerReturnType(typeHandle);
+            RuntimeTypeHandle[] parameterHandles = RuntimeAugments.GetFunctionPointerParameterTypes(typeHandle);
+            bool isUnmanaged = RuntimeAugments.IsUnmanagedFunctionPointerType(typeHandle);
 
             RuntimeTypeInfo returnType = returnTypeHandle.GetTypeForRuntimeTypeHandle();
             int count = parameterHandles.Length;
@@ -152,7 +152,7 @@ public Type GetFunctionPointerTypeForHandle(RuntimeTypeHandle typeHandle)
 
         public Type GetByRefTypeForHandle(RuntimeTypeHandle typeHandle)
         {
-            RuntimeTypeHandle targetTypeHandle = ExecutionEnvironment.GetByRefTypeTargetType(typeHandle);
+            RuntimeTypeHandle targetTypeHandle = RuntimeAugments.GetRelatedParameterTypeHandle(typeHandle);
             return targetTypeHandle.GetTypeForRuntimeTypeHandle().GetByRefType(typeHandle);
         }
 

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Reflection/Core/Execution/ExecutionEnvironment.cs

@@ -53,18 +53,14 @@ public abstract class ExecutionEnvironment
         public abstract bool TryGetNamedTypeForMetadata(QTypeDefinition qTypeDefinition, out RuntimeTypeHandle runtimeTypeHandle);
 
         public abstract bool TryGetArrayTypeForElementType(RuntimeTypeHandle elementTypeHandle, out RuntimeTypeHandle arrayTypeHandle);
-        public abstract RuntimeTypeHandle GetArrayTypeElementType(RuntimeTypeHandle arrayTypeHandle);
 
         public abstract bool TryGetMultiDimArrayTypeForElementType(RuntimeTypeHandle elementTypeHandle, int rank, out RuntimeTypeHandle arrayTypeHandle);
 
         public abstract bool TryGetFunctionPointerTypeForComponents(RuntimeTypeHandle returnTypeHandle, RuntimeTypeHandle[] parameterHandles, bool isUnmanaged, out RuntimeTypeHandle functionPointerTypeHandle);
-        public abstract void GetFunctionPointerTypeComponents(RuntimeTypeHandle functionPointerHandle, out RuntimeTypeHandle returnTypeHandle, out RuntimeTypeHandle[] parameterHandles, out bool isUnmanaged);
 
         public abstract bool TryGetPointerTypeForTargetType(RuntimeTypeHandle targetTypeHandle, out RuntimeTypeHandle pointerTypeHandle);
-        public abstract RuntimeTypeHandle GetPointerTypeTargetType(RuntimeTypeHandle pointerTypeHandle);
 
         public abstract bool TryGetByRefTypeForTargetType(RuntimeTypeHandle targetTypeHandle, out RuntimeTypeHandle byRefTypeHandle);
-        public abstract RuntimeTypeHandle GetByRefTypeTargetType(RuntimeTypeHandle byRefTypeHandle);
 
         public abstract bool TryGetConstructedGenericTypeForComponents(RuntimeTypeHandle genericTypeDefinitionHandle, RuntimeTypeHandle[] genericTypeArgumentHandles, out RuntimeTypeHandle runtimeTypeHandle);
         public abstract bool TryGetConstructedGenericTypeForComponentsNoConstraintCheck(RuntimeTypeHandle genericTypeDefinitionHandle, RuntimeTypeHandle[] genericTypeArgumentHandles, out RuntimeTypeHandle runtimeTypeHandle);

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Reflection/Core/NonPortable/RuntimeTypeUnifier.cs

@@ -7,6 +7,7 @@
 using System.Collections.Concurrent;
 using System.Runtime.CompilerServices;
 
+using Internal.Runtime;
 using Internal.Runtime.Augments;
 
 namespace Internal.Reflection.Core.NonPortable
@@ -42,12 +43,12 @@ internal static partial class RuntimeTypeUnifier
         //
         // Retrieves the unified Type object for given RuntimeTypeHandle (this is basically the Type.GetTypeFromHandle() api without the input validation.)
         //
-        internal static Type GetRuntimeTypeForEEType(EETypePtr eeType)
+        internal static unsafe RuntimeType GetRuntimeTypeForMethodTable(MethodTable* eeType)
         {
             // If writable data is supported, we shouldn't be using the hashtable - the runtime type
             // is accessible through a couple indirections from the EETypePtr which is much faster.
             Debug.Assert(!Internal.Runtime.MethodTable.SupportsWritableData);
-            return RuntimeTypeHandleToTypeCache.Table.GetOrAdd(eeType.RawValue);
+            return RuntimeTypeHandleToTypeCache.Table.GetOrAdd((IntPtr)eeType);
         }
 
         //
@@ -59,14 +60,14 @@ internal static Type GetRuntimeTypeForEEType(EETypePtr eeType)
         // does a second lookup in the true unifying tables rather than creating the Type itself.
         // Thus, the one-to-one relationship between Type reference identity and Type semantic identity is preserved.
         //
-        private sealed class RuntimeTypeHandleToTypeCache : ConcurrentUnifierW<IntPtr, Type>
+        private sealed class RuntimeTypeHandleToTypeCache : ConcurrentUnifierW<IntPtr, RuntimeType>
         {
             private RuntimeTypeHandleToTypeCache() { }
 
-            protected sealed override Type Factory(IntPtr rawRuntimeTypeHandleKey)
+            protected sealed override RuntimeType Factory(IntPtr rawRuntimeTypeHandleKey)
             {
                 EETypePtr eeType = new EETypePtr(rawRuntimeTypeHandleKey);
-                return GetRuntimeTypeBypassCache(eeType);
+                return (RuntimeType)GetRuntimeTypeBypassCache(eeType);
             }
 
             public static readonly RuntimeTypeHandleToTypeCache Table = new RuntimeTypeHandleToTypeCache();

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/Augments/RuntimeAugments.cs

@@ -602,7 +602,7 @@ public static bool IsFunctionPointerType(RuntimeTypeHandle typeHandle)
 
         public static unsafe RuntimeTypeHandle GetFunctionPointerReturnType(RuntimeTypeHandle typeHandle)
         {
-            return new RuntimeTypeHandle(new EETypePtr(typeHandle.ToMethodTable()->FunctionPointerReturnType));
+            return new RuntimeTypeHandle(typeHandle.ToMethodTable()->FunctionPointerReturnType);
         }
 
         public static unsafe int GetFunctionPointerParameterCount(RuntimeTypeHandle typeHandle)
@@ -613,7 +613,7 @@ public static unsafe int GetFunctionPointerParameterCount(RuntimeTypeHandle type
         public static unsafe RuntimeTypeHandle GetFunctionPointerParameterType(RuntimeTypeHandle typeHandle, int argumentIndex)
         {
             Debug.Assert(argumentIndex < GetFunctionPointerParameterCount(typeHandle));
-            return new RuntimeTypeHandle(new EETypePtr(typeHandle.ToMethodTable()->FunctionPointerParameters[argumentIndex]));
+            return new RuntimeTypeHandle(typeHandle.ToMethodTable()->FunctionPointerParameters[argumentIndex]);
         }
 
         public static unsafe RuntimeTypeHandle[] GetFunctionPointerParameterTypes(RuntimeTypeHandle typeHandle)
@@ -626,7 +626,7 @@ public static unsafe RuntimeTypeHandle[] GetFunctionPointerParameterTypes(Runtim
             MethodTableList parameters = typeHandle.ToMethodTable()->FunctionPointerParameters;
             for (int i = 0; i < result.Length; i++)
             {
-                result[i] = new RuntimeTypeHandle(new EETypePtr(parameters[i]));
+                result[i] = new RuntimeTypeHandle(parameters[i]);
             }
 
             return result;

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/CompilerHelpers/LdTokenHelpers.cs

@@ -31,7 +31,7 @@ private static unsafe RuntimeFieldHandle GetRuntimeFieldHandle(IntPtr pHandleSig
             return returnValue;
         }
 
-        private static unsafe Type GetRuntimeType(MethodTable* pMT)
+        private static unsafe RuntimeType GetRuntimeType(MethodTable* pMT)
         {
             return Type.GetTypeFromMethodTable(pMT);
         }

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/CompilerHelpers/SynchronizedMethodHelpers.cs

@@ -67,7 +67,7 @@ private static unsafe void MonitorExitStatic(MethodTable* pMT, ref bool lockTake
             lockTaken = false;
         }
 
-        private static unsafe Type GetStaticLockObject(MethodTable* pMT)
+        private static unsafe RuntimeType GetStaticLockObject(MethodTable* pMT)
         {
             return Type.GetTypeFromMethodTable(pMT);
         }

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/IDynamicInterfaceCastableSupport.cs

@@ -12,13 +12,13 @@ static unsafe class IDynamicCastableSupport
         [RuntimeExport("IDynamicCastableIsInterfaceImplemented")]
         internal static bool IDynamicCastableIsInterfaceImplemented(IDynamicInterfaceCastable instance, MethodTable* interfaceType, bool throwIfNotImplemented)
         {
-            return instance.IsInterfaceImplemented(new RuntimeTypeHandle(new EETypePtr(interfaceType)), throwIfNotImplemented);
+            return instance.IsInterfaceImplemented(new RuntimeTypeHandle(interfaceType), throwIfNotImplemented);
         }
 
         [RuntimeExport("IDynamicCastableGetInterfaceImplementation")]
         internal static IntPtr IDynamicCastableGetInterfaceImplementation(IDynamicInterfaceCastable instance, MethodTable* interfaceType, ushort slot)
         {
-            RuntimeTypeHandle handle = instance.GetInterfaceImplementation(new RuntimeTypeHandle(new EETypePtr(interfaceType)));
+            RuntimeTypeHandle handle = instance.GetInterfaceImplementation(new RuntimeTypeHandle(interfaceType));
             MethodTable* implType = handle.ToMethodTable();
             if (implType == null)
             {

src/coreclr/nativeaot/System.Private.CoreLib/src/Internal/Runtime/MethodTable.Runtime.cs

@@ -11,17 +11,43 @@ namespace Internal.Runtime
     // Extensions to MethodTable that are specific to the use in the CoreLib.
     internal unsafe partial struct MethodTable
     {
-#if !INPLACE_RUNTIME
-        internal static MethodTable* GetArrayEEType()
+#pragma warning disable CA1822
+        internal MethodTable* GetArrayEEType()
         {
-
             return MethodTable.Of<Array>();
         }
 
+        internal Exception GetClasslibException(ExceptionIDs id)
+        {
+            return RuntimeExceptionHelpers.GetRuntimeException(id);
+        }
+#pragma warning restore CA1822
+
         internal static bool AreSameType(MethodTable* mt1, MethodTable* mt2)
         {
             return mt1 == mt2;
         }
-#endif
+
+        internal bool IsEnum
+        {
+            get
+            {
+                // Q: When is an enum type a constructed generic type?
+                // A: When it's nested inside a generic type.
+
+                // Generic type definitions that return true for IsPrimitive are type definitions of generic enums.
+                // Otherwise check the base type.
+                return IsPrimitive && (IsGenericTypeDefinition || NonArrayBaseType == MethodTable.Of<Enum>());
+            }
+        }
+
+        // Returns true for actual primitives only, returns false for enums
+        internal bool IsActualPrimitive
+        {
+            get
+            {
+                return IsPrimitive && NonArrayBaseType == MethodTable.Of<ValueType>();
+            }
+        }
     }
 }

src/coreclr/nativeaot/System.Private.CoreLib/src/System/EETypePtr.cs

@@ -156,20 +156,11 @@ internal bool IsPrimitive
             }
         }
 
-        // WARNING: Never call unless the MethodTable came from an instanced object. Nested enums can be open generics (typeof(Outer<>).NestedEnum)
-        // and this helper has undefined behavior when passed such as a enum.
         internal bool IsEnum
         {
             get
             {
-                // Q: When is an enum type a constructed generic type?
-                // A: When it's nested inside a generic type.
-                if (!IsDefType)
-                    return false;
-
-                // Generic type definitions that return true for IsPrimitive are type definitions of generic enums.
-                // Otherwise check the base type.
-                return (IsGenericTypeDefinition && IsPrimitive) || this.BaseType == EETypePtr.EETypePtrOf<Enum>();
+                return _value->IsEnum;
             }
         }
 

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtime/InteropServices/ComWrappers.NativeAot.cs

@@ -417,7 +417,7 @@ internal sealed unsafe class ManagedObjectWrapperHolder
             static ManagedObjectWrapperHolder()
             {
                 delegate* unmanaged<IntPtr, bool> callback = &IsRootedCallback;
-                if (!RuntimeImports.RhRegisterRefCountedHandleCallback((nint)callback, typeof(ManagedObjectWrapperHolder).GetEEType()))
+                if (!RuntimeImports.RhRegisterRefCountedHandleCallback((nint)callback, EETypePtr.EETypePtrOf<ManagedObjectWrapperHolder>()))
                 {
                     throw new OutOfMemoryException();
                 }

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtime/InteropServices/UnsafeGCHandle.cs

@@ -41,7 +41,7 @@ private UnsafeGCHandle(object value, GCHandleType type)
             _handle = RuntimeImports.RhHandleAlloc(value, type);
         }
 
-        public static UnsafeGCHandle Alloc(object value, GCHandleType type)
+        public static UnsafeGCHandle Alloc(object value, GCHandleType type = GCHandleType.Normal)
         {
             return new UnsafeGCHandle(value, type);
         }

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Runtime/RuntimeImports.cs

@@ -391,10 +391,10 @@ internal static unsafe bool AreTypesAssignable(EETypePtr pSourceType, EETypePtr
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         [RuntimeImport(RuntimeLibrary, "RhTypeCast_IsInstanceOfAny")]
-        private static extern unsafe object IsInstanceOfAny(MethodTable* pTargetType, object obj);
+        internal static extern unsafe object IsInstanceOf(MethodTable* pTargetType, object obj);
 
         internal static unsafe object IsInstanceOf(EETypePtr pTargetType, object obj)
-            => IsInstanceOfAny(pTargetType.ToPointer(), obj);
+            => IsInstanceOf(pTargetType.ToPointer(), obj);
 
         //
         // calls to runtime for allocation

src/coreclr/nativeaot/System.Private.CoreLib/src/System/RuntimeTypeHandle.cs

@@ -18,15 +18,14 @@ public unsafe struct RuntimeTypeHandle : IEquatable<RuntimeTypeHandle>, ISeriali
     {
         private IntPtr _value;
 
+        internal unsafe RuntimeTypeHandle(MethodTable* pEEType)
+            => _value = (IntPtr)pEEType;
+
         internal RuntimeTypeHandle(EETypePtr pEEType)
-            : this(pEEType.RawValue)
-        {
-        }
+            => _value = pEEType.RawValue;
 
         private RuntimeTypeHandle(IntPtr value)
-        {
-            _value = value;
-        }
+            => _value = value;
 
         public override bool Equals(object? obj)
         {

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Type.NativeAot.cs

@@ -23,17 +23,17 @@ public abstract partial class Type : MemberInfo, IReflect
         public static unsafe Type? GetTypeFromHandle(RuntimeTypeHandle handle) => handle.IsNull ? null : GetTypeFromMethodTable(handle.ToMethodTable());
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal static unsafe Type GetTypeFromMethodTable(MethodTable* pMT)
+        internal static unsafe RuntimeType GetTypeFromMethodTable(MethodTable* pMT)
         {
             // If we support the writable data section on MethodTables, the runtime type associated with the MethodTable
             // is cached there. If writable data is not supported, we need to do a lookup in the runtime type
             // unifier's hash table.
             if (MethodTable.SupportsWritableData)
             {
-                ref GCHandle handle = ref Unsafe.AsRef<GCHandle>(pMT->WritableData);
+                ref UnsafeGCHandle handle = ref Unsafe.AsRef<UnsafeGCHandle>(pMT->WritableData);
                 if (handle.IsAllocated)
                 {
-                    return Unsafe.As<Type>(handle.Target);
+                    return Unsafe.As<RuntimeType>(handle.Target);
                 }
                 else
                 {
@@ -42,26 +42,26 @@ internal static unsafe Type GetTypeFromMethodTable(MethodTable* pMT)
             }
             else
             {
-                return RuntimeTypeUnifier.GetRuntimeTypeForEEType(new EETypePtr(pMT));
+                return RuntimeTypeUnifier.GetRuntimeTypeForMethodTable(pMT);
             }
         }
 
         [MethodImpl(MethodImplOptions.NoInlining)]
-        private static unsafe Type GetTypeFromMethodTableSlow(MethodTable* pMT, ref GCHandle handle)
+        private static unsafe RuntimeType GetTypeFromMethodTableSlow(MethodTable* pMT, ref UnsafeGCHandle handle)
         {
             // Note: this is bypassing the "fast" unifier cache (based on a simple IntPtr
             // identity of MethodTable pointers). There is another unifier behind that cache
             // that ensures this code is race-free.
             Type result = RuntimeTypeUnifier.GetRuntimeTypeBypassCache(new EETypePtr(pMT));
-            GCHandle tempHandle = GCHandle.Alloc(result);
+            UnsafeGCHandle tempHandle = UnsafeGCHandle.Alloc(result);
 
             // We don't want to leak a handle if there's a race
-            if (Interlocked.CompareExchange(ref Unsafe.As<GCHandle, IntPtr>(ref handle), (IntPtr)tempHandle, default) != default)
+            if (Interlocked.CompareExchange(ref Unsafe.As<UnsafeGCHandle, IntPtr>(ref handle), Unsafe.As<UnsafeGCHandle, IntPtr>(ref tempHandle), default) != default)
             {
                 tempHandle.Free();
             }
 
-            return result;
+            return Unsafe.As<RuntimeType>(handle.Target);
         }
 
         internal EETypePtr GetEEType()