1 files changed, 51 insertions, 0 deletions
diff --git a/src/ILCompiler.Compiler/src/Compiler/NoMetadataBlockingPolicy.cs b/src/ILCompiler.Compiler/src/Compiler/NoMetadataBlockingPolicy.cs
new file mode 100644
index 000000000..af0c073b9
--- /dev/null
+++ b/src/ILCompiler.Compiler/src/Compiler/NoMetadataBlockingPolicy.cs
@@ -0,0 +1,51 @@
+// 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 Internal.TypeSystem;
+using Internal.TypeSystem.Ecma;
+
+namespace ILCompiler
+{
+    /// <summary>
+    /// Represents a metadata blocking policy that doesn't block any metadata.
+    /// </summary>
+    public sealed class NoMetadataBlockingPolicy : MetadataBlockingPolicy
+    {
+        public override bool IsBlocked(MetadataType type) => !(type is EcmaType);
+
+        public override bool IsBlocked(FieldDesc field) => !(field is EcmaField);
+
+        private MetadataType _arrayOfTType;
+        private MetadataType InitializeArrayOfTType(TypeSystemEntity contextEntity)
+        {
+            _arrayOfTType = contextEntity.Context.SystemModule.GetType("System", "Array`1");
+            return _arrayOfTType;
+        }
+        private MetadataType GetArrayOfTType(TypeSystemEntity contextEntity)
+        {
+            if (_arrayOfTType != null)
+            {
+                return _arrayOfTType;
+            }
+            return InitializeArrayOfTType(contextEntity);
+        }
+
+        public override bool IsBlocked(MethodDesc method)
+        {
+            if (method is EcmaMethod ecmaMethod)
+            {
+                // Methods on Array`1<T> are implementation details that implement the generic interfaces on
+                // arrays. They should not generate metadata or be reflection invokable.
+                // We can get rid of this special casing if we make these methods stop being regular EcmaMethods
+                // with Array<T> as their owning type
+                if (ecmaMethod.OwningType == GetArrayOfTType(ecmaMethod))
+                    return true;
+
+                return false;
+            }
+
+            return true;
+        }
+    }
+}