Fix or workaround bugs for libuv demo

- Add missing forwarders for IsVirtual and IsNewSlot to generic method specializations
- Extend workaround for infinite recursion in virtual method resolution
- Fill implementation of several runtime helpers

src/Common/src/TypeSystem/Common/InstantiatedMethod.cs

@@ -72,6 +72,22 @@ namespace Internal.TypeSystem
             }
         }
 
+        public override bool IsVirtual
+        {
+            get
+            {
+                return _methodDef.IsVirtual;
+            }
+        }
+
+        public override bool IsNewSlot
+        {
+            get
+            {
+                return _methodDef.IsNewSlot;
+            }
+        }
+
         public override MethodDesc GetMethodDefinition()
         {
             return _methodDef;

src/Common/src/TypeSystem/Common/MethodForInstantiatedType.cs

@@ -67,6 +67,22 @@ namespace Internal.TypeSystem
             }
         }
 
+        public override bool IsVirtual
+        {
+            get
+            {
+                return _typicalMethodDef.IsVirtual;
+            }
+        }
+
+        public override bool IsNewSlot
+        {
+            get
+            {
+                return _typicalMethodDef.IsNewSlot;
+            }
+        }
+
         public override MethodDesc GetTypicalMethodDefinition()
         {
             return _typicalMethodDef;

src/Common/src/TypeSystem/Common/VirtualFunctionResolution.cs

@@ -77,13 +77,25 @@ namespace Internal.TypeSystem
             MethodSignature sig = targetMethod.Signature;
 
             TypeDesc t = objectType;
-            for (;;)
+            while (t != null)
             {
                 MethodDesc implMethod = t.GetMethod(name, sig);
                 if (implMethod != null)
                     return implMethod;
                 t = t.BaseType;
             }
+
+            t = objectType;
+            while (t != null)
+            {
+                MethodDesc implMethod = t.GetMethod(name, null);
+                if (implMethod != null)
+                    return implMethod;
+                t = t.BaseType;
+            }
+
+            Debug.Assert(false);
+            return null;
 #else
             // Step 1, convert objectType to uninstantiated form
             TypeDesc uninstantiatedType = objectType;

src/ILToNative/reproNative/main.cpp

@@ -532,7 +532,6 @@ extern "C" int32_t RhGetModuleFileName(intptr_t, uint16_t**)
 
 extern "C" void RhSuppressFinalize(System::Object*)
 {
-    throw 42;
 }
 
 extern "C" uint8_t RhGetCorElementType(System::EETypePtr)
@@ -560,6 +559,21 @@ extern "C" uint8_t RhIsValueType(System::EETypePtr)
     throw 42;
 }
 
+extern "C" uint8_t RhIsArray(System::EETypePtr)
+{
+    throw 42;
+}
+
+extern "C" intptr_t RhHandleAlloc(System::Object *pObject, int type)
+{
+    return (intptr_t)HndCreateHandle(g_HandleTableMap.pBuckets[0]->pTable[GetCurrentThreadHomeHeapNumber()], type, (OBJECTREF)pObject);
+}
+
+extern "C" void RhHandleFree(OBJECTHANDLE handle)
+{
+    DestroyTypedHandle(handle);
+}
+
 extern "C" intptr_t RhHandleAllocDependent(System::Object*, System::Object*)
 {
     throw 42;
@@ -570,9 +584,9 @@ extern "C" System::Object* RhHandleGetDependent(intptr_t)
     throw 42;
 }
 
-extern "C" System::Object* RhHandleGet(intptr_t)
+extern "C" System::Object* RhHandleGet(OBJECTHANDLE handle)
 {
-    throw 42;
+    return (System::Object*)ObjectFromHandle(handle);
 }
 
 extern "C" intptr_t RhSetErrorInfoBuffer(intptr_t)