[MERGE #3587 @rajatd] Setting internal properties with "enumerable" attribute off.

Merge pull request #3587 from rajatd:hasNoEnumerableProps-2

While we don't enumerate internal properties, setting an internal property as enumerable unnecessarily sets the hasNoEnumerableProperties flag to false on the type handler. This may have perf impact as this flag is used to skip prototypes when enumerating properties.

Changing this to set internal properties as non-enumerable from the beginning. Doing this for non-path type handlers only because,
1. An object with a path type handler should theoretically have hasNoEnumerableProperties set to false anyway.
2. Setting a non-enumerable property on an object with a path type handler will convert its type handler to a (simple) dictionary type handler.

Fixes #1622

lib/Runtime/Types/DeferredTypeHandler.h

@@ -97,6 +97,7 @@ namespace Js
         virtual BOOL GetProperty(DynamicObject* instance, Var originalInstance, JavascriptString* propertyNameString, Var* value, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL SetProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, JavascriptString* propertyNameString, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
+        virtual BOOL SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, JavascriptString* propertyNameString, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags flags) override;
@@ -320,6 +321,17 @@ namespace Js
         return GetCurrentTypeHandler(instance)->SetProperty(instance, propertyNameString, value, flags, info);
     }
 
+    template <DeferredTypeInitializer initializer, typename DeferredTypeFilter, bool isPrototypeTemplate, uint16 _inlineSlotCapacity, uint16 _offsetOfInlineSlots>
+    BOOL DeferredTypeHandler<initializer, DeferredTypeFilter, isPrototypeTemplate, _inlineSlotCapacity, _offsetOfInlineSlots>::SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags)
+    {
+        if (!EnsureObjectReady(instance, DeferredInitializeMode_Set))
+        {
+            return TRUE;
+        }
+
+        return GetCurrentTypeHandler(instance)->SetInternalProperty(instance, propertyId, value, flags);
+    }
+
     template <DeferredTypeInitializer initializer, typename DeferredTypeFilter, bool isPrototypeTemplate, uint16 _inlineSlotCapacity, uint16 _offsetOfInlineSlots>
     DescriptorFlags DeferredTypeHandler<initializer, DeferredTypeFilter, isPrototypeTemplate, _inlineSlotCapacity, _offsetOfInlineSlots>::GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext)
     {

lib/Runtime/Types/DictionaryTypeHandler.cpp

@@ -864,6 +864,12 @@ namespace Js
         return DictionaryTypeHandlerBase<T>::SetProperty(instance, propertyRecord->GetPropertyId(), value, flags, info);
     }
 
+    template <typename T>
+    BOOL DictionaryTypeHandlerBase<T>::SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags)
+    {
+        return SetPropertyWithAttributes(instance, propertyId, value, PropertyWritable & PropertyConfigurable, nullptr, flags);
+    }
+
     template <typename T>
     BOOL DictionaryTypeHandlerBase<T>::DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags propertyOperationFlags)
     {

lib/Runtime/Types/DictionaryTypeHandler.h

@@ -89,6 +89,7 @@ namespace Js
         virtual BOOL InitProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, JavascriptString* propertyNameString, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
+        virtual BOOL SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, JavascriptString* propertyNameString, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags flags) override;

lib/Runtime/Types/NullTypeHandler.cpp

@@ -132,6 +132,11 @@ namespace Js
         return ConvertToSimpleType(instance)->SetProperty(instance, propertyNameString, value, flags, info);
     }
 
+    BOOL NullTypeHandlerBase::SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags)
+    {
+        return SetPropertyWithAttributes(instance, propertyId, value, PropertyWritable & PropertyConfigurable, nullptr, flags);
+    }
+
     BOOL NullTypeHandlerBase::AddProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyAttributes attributes, PropertyValueInfo* info, PropertyOperationFlags flags, SideEffects possibleSideEffects)
     {
         if (this->isPrototype && (ChangeTypeOnProto() || (GetIsShared() && IsolatePrototypes())))

lib/Runtime/Types/NullTypeHandler.h

@@ -39,6 +39,7 @@ namespace Js
         virtual BOOL GetProperty(DynamicObject* instance, Var originalInstance, JavascriptString* propertyNameString, Var* value, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL SetProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, JavascriptString* propertyNameString, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
+        virtual BOOL SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags) override;
         virtual BOOL DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags flags) override;
         virtual BOOL IsEnumerable(DynamicObject* instance, PropertyId propertyId) override;
         virtual BOOL IsWritable(DynamicObject* instance, PropertyId propertyId) override;

lib/Runtime/Types/SimpleDictionaryTypeHandler.cpp

@@ -1452,6 +1452,12 @@ namespace Js
         return true;
     }
 
+    template <typename TPropertyIndex, typename TMapKey, bool IsNotExtensibleSupported>
+    BOOL SimpleDictionaryTypeHandlerBase<TPropertyIndex, TMapKey, IsNotExtensibleSupported>::SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags)
+    {
+        return SetPropertyWithAttributes(instance, propertyId, value, PropertyWritable & PropertyConfigurable, nullptr, flags);
+    }
+
     template <typename TPropertyIndex, typename TMapKey, bool IsNotExtensibleSupported>
     DescriptorFlags SimpleDictionaryTypeHandlerBase<TPropertyIndex, TMapKey, IsNotExtensibleSupported>::GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext)
     {

lib/Runtime/Types/SimpleDictionaryTypeHandler.h

@@ -130,6 +130,7 @@ namespace Js
         virtual BOOL GetProperty(DynamicObject* instance, Var originalInstance, JavascriptString* propertyNameString, Var* value, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL SetProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, JavascriptString* propertyNameString, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
+        virtual BOOL SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, JavascriptString* propertyNameString, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags flags) override sealed;

lib/Runtime/Types/SimpleTypeHandler.cpp

@@ -1059,6 +1059,12 @@ namespace Js
         ConvertToSimpleDictionaryType(instance)->SetIsPrototype(instance);
     }
 
+    template<size_t size>
+    BOOL SimpleTypeHandler<size>::SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags)
+    {
+        return SetPropertyWithAttributes(instance, propertyId, value, PropertyWritable & PropertyConfigurable, nullptr, flags);
+    }
+
 #if DBG
     template<size_t size>
     bool SimpleTypeHandler<size>::CanStorePropertyValueDirectly(const DynamicObject* instance, PropertyId propertyId, bool allowLetConst)

lib/Runtime/Types/SimpleTypeHandler.h

@@ -45,6 +45,7 @@ namespace Js
         virtual BOOL GetProperty(DynamicObject* instance, Var originalInstance, JavascriptString* propertyNameString, Var* value, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL SetProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
         virtual BOOL SetProperty(DynamicObject* instance, JavascriptString* propertyNameString, Var value, PropertyOperationFlags flags, PropertyValueInfo* info) override;
+        virtual BOOL SetInternalProperty(DynamicObject* instance, PropertyId propertyId, Var value, PropertyOperationFlags flags) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, PropertyId propertyId, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual DescriptorFlags GetSetter(DynamicObject* instance, JavascriptString* propertyNameString, Var* setterValue, PropertyValueInfo* info, ScriptContext* requestContext) override;
         virtual BOOL DeleteProperty(DynamicObject* instance, PropertyId propertyId, PropertyOperationFlags flags) override;
@@ -60,7 +61,6 @@ namespace Js
         virtual BOOL SetPropertyWithAttributes(DynamicObject* instance, PropertyId propertyId, Var value, PropertyAttributes attributes, PropertyValueInfo* info, PropertyOperationFlags flags = PropertyOperation_None, SideEffects possibleSideEffects = SideEffects_Any) override;
         virtual BOOL SetAttributes(DynamicObject* instance, PropertyId propertyId, PropertyAttributes attributes) override;
         virtual BOOL GetAttributesWithPropertyIndex(DynamicObject * instance, PropertyId propertyId, BigPropertyIndex index, PropertyAttributes * attributes) override;
-
         virtual void SetAllPropertiesToUndefined(DynamicObject* instance, bool invalidateFixedFields) override;
         virtual void MarshalAllPropertiesToScriptContext(DynamicObject* instance, ScriptContext* targetScriptContext, bool invalidateFixedFields) override;
         virtual DynamicTypeHandler* ConvertToTypeWithItemAttributes(DynamicObject* instance) override;