1 files changed, 61 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Reflection/Pointer.cs b/src/mscorlib/shared/System/Reflection/Pointer.cs
new file mode 100644
index 0000000000..13a5efff46
--- /dev/null
+++ b/src/mscorlib/shared/System/Reflection/Pointer.cs
@@ -0,0 +1,61 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics;
+using System.Runtime.Serialization;
+
+namespace System.Reflection
+{
+    [Serializable]
+    [CLSCompliant(false)]
+    public sealed unsafe class Pointer : ISerializable
+    {
+        // CoreCLR: Do not add or remove fields without updating the ReflectionPointer class in runtimehandles.h
+        private readonly void* _ptr;
+        private readonly Type _ptrType;
+
+        private Pointer(void* ptr, Type ptrType)
+        {
+            Debug.Assert(ptrType.IsRuntimeImplemented()); // CoreCLR: For CoreRT's sake, _ptrType has to be declared as "Type", but in fact, it is always a RuntimeType. Code on CoreCLR expects this.
+            _ptr = ptr;
+            _ptrType = ptrType;
+        }
+
+        private Pointer(SerializationInfo info, StreamingContext context)
+        {
+            _ptr = ((IntPtr)(info.GetValue("_ptr", typeof(IntPtr)))).ToPointer();
+            _ptrType = (Type)info.GetValue("_ptrType", typeof(Type));
+            if (!_ptrType.IsRuntimeImplemented())
+                throw new SerializationException(SR.Arg_MustBeType);
+        }
+
+        public static object Box(void* ptr, Type type)
+        {
+            if (type == null)
+                throw new ArgumentNullException(nameof(type));
+            if (!type.IsPointer)
+                throw new ArgumentException(SR.Arg_MustBePointer, nameof(ptr));
+            if (!type.IsRuntimeImplemented())
+                throw new ArgumentException(SR.Arg_MustBeType, nameof(ptr));
+
+            return new Pointer(ptr, type);
+        }
+
+        public static void* Unbox(object ptr)
+        {
+            if (!(ptr is Pointer))
+                throw new ArgumentException(SR.Arg_MustBePointer, nameof(ptr));
+            return ((Pointer)ptr)._ptr;
+        }
+
+        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+            info.AddValue("_ptr", new IntPtr(_ptr));
+            info.AddValue("_ptrType", _ptrType);
+        }
+
+        internal Type GetPointerType() => _ptrType;
+        internal object GetPointerValue() => (IntPtr)_ptr;
+    }
+}