LibJS: Add PropertyLookupPhase enum to distinguish Object [[Get]] calls

We can now tell the difference between an own property access and a
subsequent (automatic) prototype chain access.

This will be used to implement caching of prototype chain accesses.

Userland/Applications/Spreadsheet/JSIntegration.cpp

@@ -113,7 +113,7 @@ JS::ThrowCompletionOr<bool> SheetGlobalObject::internal_has_property(JS::Propert
     return Object::internal_has_property(name);
 }
 
-JS::ThrowCompletionOr<JS::Value> SheetGlobalObject::internal_get(const JS::PropertyKey& property_name, JS::Value receiver, JS::CacheablePropertyMetadata*) const
+JS::ThrowCompletionOr<JS::Value> SheetGlobalObject::internal_get(const JS::PropertyKey& property_name, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const
 {
     if (property_name.is_string()) {
         if (property_name.as_string() == "value") {

Userland/Applications/Spreadsheet/JSIntegration.h

@@ -29,7 +29,7 @@ public:
     virtual ~SheetGlobalObject() override = default;
 
     virtual JS::ThrowCompletionOr<bool> internal_has_property(JS::PropertyKey const& name) const override;
-    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*) const override;
+    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver, JS::CacheablePropertyMetadata*) override;
 
     JS_DECLARE_NATIVE_FUNCTION(get_real_cell_contents);

Userland/Libraries/LibJS/Runtime/ArgumentsObject.cpp

@@ -33,7 +33,7 @@ void ArgumentsObject::visit_edges(Cell::Visitor& visitor)
 }
 
 // 10.4.4.3 [[Get]] ( P, Receiver ), https://tc39.es/ecma262/#sec-arguments-exotic-objects-get-p-receiver
-ThrowCompletionOr<Value> ArgumentsObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata) const
+ThrowCompletionOr<Value> ArgumentsObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     // 1. Let map be args.[[ParameterMap]].
     auto& map = *m_parameter_map;
@@ -44,7 +44,7 @@ ThrowCompletionOr<Value> ArgumentsObject::internal_get(PropertyKey const& proper
     // 3. If isMapped is false, then
     if (!is_mapped) {
         // a. Return ? OrdinaryGet(args, P, Receiver).
-        return Object::internal_get(property_key, receiver, cacheable_metadata);
+        return Object::internal_get(property_key, receiver, cacheable_metadata, phase);
     }
 
     // FIXME: a. Assert: map contains a formal parameter mapping for P.

Userland/Libraries/LibJS/Runtime/ArgumentsObject.h

@@ -24,7 +24,7 @@ public:
 
     virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
     virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override;
-    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata*) const override;
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual ThrowCompletionOr<bool> internal_set(PropertyKey const&, Value value, Value receiver, CacheablePropertyMetadata*) override;
     virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
 

Userland/Libraries/LibJS/Runtime/ModuleNamespaceObject.cpp

@@ -137,14 +137,14 @@ ThrowCompletionOr<bool> ModuleNamespaceObject::internal_has_property(PropertyKey
 }
 
 // 10.4.6.8 [[Get]] ( P, Receiver ), https://tc39.es/ecma262/#sec-module-namespace-exotic-objects-get-p-receiver
-ThrowCompletionOr<Value> ModuleNamespaceObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata) const
+ThrowCompletionOr<Value> ModuleNamespaceObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     auto& vm = this->vm();
 
     // 1. If Type(P) is Symbol, then
     if (property_key.is_symbol()) {
         // a. Return ! OrdinaryGet(O, P, Receiver).
-        return MUST(Object::internal_get(property_key, receiver, cacheable_metadata));
+        return MUST(Object::internal_get(property_key, receiver, cacheable_metadata, phase));
     }
 
     // 2. Let exports be O.[[Exports]].

Userland/Libraries/LibJS/Runtime/ModuleNamespaceObject.h

@@ -26,7 +26,7 @@ public:
     virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
     virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override;
     virtual ThrowCompletionOr<bool> internal_has_property(PropertyKey const&) const override;
-    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata* = nullptr) const override;
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata* = nullptr, PropertyLookupPhase = PropertyLookupPhase::OwnProperty) const override;
     virtual ThrowCompletionOr<bool> internal_set(PropertyKey const&, Value value, Value receiver, CacheablePropertyMetadata*) override;
     virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
     virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const override;

Userland/Libraries/LibJS/Runtime/Object.cpp

@@ -873,7 +873,7 @@ ThrowCompletionOr<bool> Object::internal_has_property(PropertyKey const& propert
 }
 
 // 10.1.8 [[Get]] ( P, Receiver ), https://tc39.es/ecma262/#sec-ordinary-object-internal-methods-and-internal-slots-get-p-receiver
-ThrowCompletionOr<Value> Object::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata) const
+ThrowCompletionOr<Value> Object::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     VERIFY(!receiver.is_empty());
     VERIFY(property_key.is_valid());
@@ -893,17 +893,19 @@ ThrowCompletionOr<Value> Object::internal_get(PropertyKey const& property_key, V
             return js_undefined();
 
         // c. Return ? parent.[[Get]](P, Receiver).
-        return parent->internal_get(property_key, receiver);
+        return parent->internal_get(property_key, receiver, nullptr, PropertyLookupPhase::PrototypeChain);
     }
 
     // 3. If IsDataDescriptor(desc) is true, return desc.[[Value]].
     if (descriptor->is_data_descriptor()) {
         // Non-standard: If the caller has requested cacheable metadata and the property is an own property, fill it in.
         if (cacheable_metadata && descriptor->property_offset.has_value() && shape().is_cacheable()) {
-            *cacheable_metadata = CacheablePropertyMetadata {
-                .type = CacheablePropertyMetadata::Type::OwnProperty,
-                .property_offset = descriptor->property_offset.value(),
-            };
+            if (phase == PropertyLookupPhase::OwnProperty) {
+                *cacheable_metadata = CacheablePropertyMetadata {
+                    .type = CacheablePropertyMetadata::Type::OwnProperty,
+                    .property_offset = descriptor->property_offset.value(),
+                };
+            }
         }
         return *descriptor->value;
     }

Userland/Libraries/LibJS/Runtime/Object.h

@@ -138,7 +138,11 @@ public:
     virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const;
     virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&);
     virtual ThrowCompletionOr<bool> internal_has_property(PropertyKey const&) const;
-    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata* = nullptr) const;
+    enum class PropertyLookupPhase {
+        OwnProperty,
+        PrototypeChain,
+    };
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata* = nullptr, PropertyLookupPhase = PropertyLookupPhase::OwnProperty) const;
     virtual ThrowCompletionOr<bool> internal_set(PropertyKey const&, Value value, Value receiver, CacheablePropertyMetadata* = nullptr);
     virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&);
     virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const;

Userland/Libraries/LibJS/Runtime/ProxyObject.cpp

@@ -455,7 +455,7 @@ ThrowCompletionOr<bool> ProxyObject::internal_has_property(PropertyKey const& pr
 }
 
 // 10.5.8 [[Get]] ( P, Receiver ), https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-get-p-receiver
-ThrowCompletionOr<Value> ProxyObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata*) const
+ThrowCompletionOr<Value> ProxyObject::internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata*, PropertyLookupPhase) const
 {
     // NOTE: We don't return any cacheable metadata for proxy lookups.
 

Userland/Libraries/LibJS/Runtime/ProxyObject.h

@@ -39,7 +39,7 @@ public:
     virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
     virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override;
     virtual ThrowCompletionOr<bool> internal_has_property(PropertyKey const&) const override;
-    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata*) const override;
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const&, Value receiver, CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual ThrowCompletionOr<bool> internal_set(PropertyKey const&, Value value, Value receiver, CacheablePropertyMetadata*) override;
     virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
     virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const override;

Userland/Libraries/LibJS/Runtime/TypedArray.h

@@ -317,7 +317,7 @@ public:
     }
 
     // 10.4.5.4 [[Get]] ( P, Receiver ), 10.4.5.4 [[Get]] ( P, Receiver )
-    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata) const override
+    virtual ThrowCompletionOr<Value> internal_get(PropertyKey const& property_key, Value receiver, CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const override
     {
         VERIFY(!receiver.is_empty());
 
@@ -339,7 +339,7 @@ public:
         }
 
         // 2. Return ? OrdinaryGet(O, P, Receiver).
-        return Object::internal_get(property_key, receiver, cacheable_metadata);
+        return Object::internal_get(property_key, receiver, cacheable_metadata, phase);
     }
 
     // 10.4.5.5 [[Set]] ( P, V, Receiver ), https://tc39.es/ecma262/#sec-integer-indexed-exotic-objects-set-p-v-receiver

Userland/Libraries/LibWeb/CSS/CSSStyleDeclaration.cpp

@@ -409,15 +409,15 @@ JS::ThrowCompletionOr<bool> CSSStyleDeclaration::internal_has_property(JS::Prope
     return property_id_from_name(name.to_string()) != CSS::PropertyID::Invalid;
 }
 
-JS::ThrowCompletionOr<JS::Value> CSSStyleDeclaration::internal_get(JS::PropertyKey const& name, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata) const
+JS::ThrowCompletionOr<JS::Value> CSSStyleDeclaration::internal_get(JS::PropertyKey const& name, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     if (name.is_number())
         return { JS::PrimitiveString::create(vm(), item(name.as_number())) };
     if (!name.is_string())
-        return Base::internal_get(name, receiver, cacheable_metadata);
+        return Base::internal_get(name, receiver, cacheable_metadata, phase);
     auto property_id = property_id_from_name(name.to_string());
     if (property_id == CSS::PropertyID::Invalid)
-        return Base::internal_get(name, receiver, cacheable_metadata);
+        return Base::internal_get(name, receiver, cacheable_metadata, phase);
     if (auto maybe_property = property(property_id); maybe_property.has_value())
         return { JS::PrimitiveString::create(vm(), maybe_property->value->to_string()) };
     return { JS::PrimitiveString::create(vm(), String {}) };

Userland/Libraries/LibWeb/CSS/CSSStyleDeclaration.h

@@ -42,7 +42,7 @@ public:
     virtual String serialized() const = 0;
 
     virtual JS::ThrowCompletionOr<bool> internal_has_property(JS::PropertyKey const& name) const override;
-    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*) const override;
+    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver, JS::CacheablePropertyMetadata*) override;
 
 protected:

Userland/Libraries/LibWeb/HTML/Location.cpp

@@ -483,13 +483,13 @@ JS::ThrowCompletionOr<bool> Location::internal_define_own_property(JS::PropertyK
 }
 
 // 7.10.5.7 [[Get]] ( P, Receiver ), https://html.spec.whatwg.org/multipage/history.html#location-get
-JS::ThrowCompletionOr<JS::Value> Location::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata) const
+JS::ThrowCompletionOr<JS::Value> Location::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheablePropertyMetadata* cacheable_metadata, PropertyLookupPhase phase) const
 {
     auto& vm = this->vm();
 
     // 1. If IsPlatformObjectSameOrigin(this) is true, then return ? OrdinaryGet(this, P, Receiver).
     if (HTML::is_platform_object_same_origin(*this))
-        return JS::Object::internal_get(property_key, receiver, cacheable_metadata);
+        return JS::Object::internal_get(property_key, receiver, cacheable_metadata, phase);
 
     // 2. Return ? CrossOriginGet(this, P, Receiver).
     return HTML::cross_origin_get(vm, static_cast<JS::Object const&>(*this), property_key, receiver);

Userland/Libraries/LibWeb/HTML/Location.h

@@ -60,7 +60,7 @@ public:
     virtual JS::ThrowCompletionOr<bool> internal_prevent_extensions() override;
     virtual JS::ThrowCompletionOr<Optional<JS::PropertyDescriptor>> internal_get_own_property(JS::PropertyKey const&) const override;
     virtual JS::ThrowCompletionOr<bool> internal_define_own_property(JS::PropertyKey const&, JS::PropertyDescriptor const&) override;
-    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*) const override;
+    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver, JS::CacheablePropertyMetadata*) override;
     virtual JS::ThrowCompletionOr<bool> internal_delete(JS::PropertyKey const&) override;
     virtual JS::ThrowCompletionOr<JS::MarkedVector<JS::Value>> internal_own_property_keys() const override;

Userland/Libraries/LibWeb/HTML/WindowProxy.cpp

@@ -153,7 +153,7 @@ JS::ThrowCompletionOr<bool> WindowProxy::internal_define_own_property(JS::Proper
 }
 
 // 7.4.7 [[Get]] ( P, Receiver ), https://html.spec.whatwg.org/multipage/window-object.html#windowproxy-get
-JS::ThrowCompletionOr<JS::Value> WindowProxy::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheablePropertyMetadata*) const
+JS::ThrowCompletionOr<JS::Value> WindowProxy::internal_get(JS::PropertyKey const& property_key, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const
 {
     auto& vm = this->vm();
 

Userland/Libraries/LibWeb/HTML/WindowProxy.h

@@ -27,7 +27,7 @@ public:
     virtual JS::ThrowCompletionOr<bool> internal_prevent_extensions() override;
     virtual JS::ThrowCompletionOr<Optional<JS::PropertyDescriptor>> internal_get_own_property(JS::PropertyKey const&) const override;
     virtual JS::ThrowCompletionOr<bool> internal_define_own_property(JS::PropertyKey const&, JS::PropertyDescriptor const&) override;
-    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*) const override;
+    virtual JS::ThrowCompletionOr<JS::Value> internal_get(JS::PropertyKey const&, JS::Value receiver, JS::CacheablePropertyMetadata*, PropertyLookupPhase) const override;
     virtual JS::ThrowCompletionOr<bool> internal_set(JS::PropertyKey const&, JS::Value value, JS::Value receiver, JS::CacheablePropertyMetadata*) override;
     virtual JS::ThrowCompletionOr<bool> internal_delete(JS::PropertyKey const&) override;
     virtual JS::ThrowCompletionOr<JS::MarkedVector<JS::Value>> internal_own_property_keys() const override;