LibJS: Propagate errors from Intrinsics initialization

Userland/Libraries/LibJS/Contrib/Test262/$262Object.cpp

@@ -60,7 +60,7 @@ JS_DEFINE_NATIVE_FUNCTION($262Object::clear_kept_objects)
 
 JS_DEFINE_NATIVE_FUNCTION($262Object::create_realm)
 {
-    auto realm = Realm::create(vm);
+    auto realm = MUST_OR_THROW_OOM(Realm::create(vm));
     auto realm_global_object = vm.heap().allocate_without_realm<GlobalObject>(*realm);
     VERIFY(realm_global_object);
     realm->set_global_object(realm_global_object, nullptr);

Userland/Libraries/LibJS/Runtime/Intrinsics.cpp

@@ -136,7 +136,7 @@ static void initialize_constructor(VM& vm, PropertyKey const& property_key, Obje
 }
 
 // 9.3.2 CreateIntrinsics ( realmRec ), https://tc39.es/ecma262/#sec-createintrinsics
-NonnullGCPtr<Intrinsics> Intrinsics::create(Realm& realm)
+ThrowCompletionOr<NonnullGCPtr<Intrinsics>> Intrinsics::create(Realm& realm)
 {
     auto& vm = realm.vm();
 
@@ -158,7 +158,7 @@ NonnullGCPtr<Intrinsics> Intrinsics::create(Realm& realm)
     //    is the specified value of the function's [[Prototype]] internal slot. The
     //    creation of the intrinsics and their properties must be ordered to avoid
     //    any dependencies upon objects that have not yet been created.
-    intrinsics->initialize_intrinsics(realm);
+    MUST_OR_THROW_OOM(intrinsics->initialize_intrinsics(realm));
 
     // 3. Perform AddRestrictedFunctionProperties(realmRec.[[Intrinsics]].[[%Function.prototype%]], realmRec).
     add_restricted_function_properties(static_cast<FunctionObject&>(*realm.intrinsics().function_prototype()), realm);
@@ -167,7 +167,7 @@ NonnullGCPtr<Intrinsics> Intrinsics::create(Realm& realm)
     return *intrinsics;
 }
 
-void Intrinsics::initialize_intrinsics(Realm& realm)
+ThrowCompletionOr<void> Intrinsics::initialize_intrinsics(Realm& realm)
 {
     auto& vm = this->vm();
 
@@ -184,8 +184,8 @@ void Intrinsics::initialize_intrinsics(Realm& realm)
     m_new_ordinary_function_prototype_object_shape->add_property_without_transition(vm.names.constructor, Attribute::Writable | Attribute::Configurable);
 
     // Normally Heap::allocate() takes care of this, but these are allocated via allocate_without_realm().
-    static_cast<FunctionPrototype*>(m_function_prototype)->initialize(realm);
-    static_cast<ObjectPrototype*>(m_object_prototype)->initialize(realm);
+    MUST_OR_THROW_OOM(static_cast<FunctionPrototype*>(m_function_prototype)->initialize(realm));
+    MUST_OR_THROW_OOM(static_cast<ObjectPrototype*>(m_object_prototype)->initialize(realm));
 
 #define __JS_ENUMERATE(ClassName, snake_name) \
     VERIFY(!m_##snake_name##_prototype);      \
@@ -255,6 +255,8 @@ void Intrinsics::initialize_intrinsics(Realm& realm)
     m_json_parse_function = &json_object()->get_without_side_effects(vm.names.parse).as_function();
     m_json_stringify_function = &json_object()->get_without_side_effects(vm.names.stringify).as_function();
     m_object_prototype_to_string_function = &object_prototype()->get_without_side_effects(vm.names.toString).as_function();
+
+    return {};
 }
 
 template<typename T>

Userland/Libraries/LibJS/Runtime/Intrinsics.h

@@ -15,7 +15,7 @@ class Intrinsics final : public Cell {
     JS_CELL(Intrinsics, Cell);
 
 public:
-    static NonnullGCPtr<Intrinsics> create(Realm&);
+    static ThrowCompletionOr<NonnullGCPtr<Intrinsics>> create(Realm&);
 
     Shape* empty_object_shape() { return m_empty_object_shape; }
 
@@ -98,7 +98,7 @@ private:
 
     virtual void visit_edges(Visitor&) override;
 
-    void initialize_intrinsics(Realm&);
+    ThrowCompletionOr<void> initialize_intrinsics(Realm&);
 
 #define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
     void initialize_##snake_name();

Userland/Libraries/LibJS/Runtime/Realm.cpp

@@ -15,13 +15,13 @@
 namespace JS {
 
 // 9.3.1 CreateRealm ( ), https://tc39.es/ecma262/#sec-createrealm
-NonnullGCPtr<Realm> Realm::create(VM& vm)
+ThrowCompletionOr<NonnullGCPtr<Realm>> Realm::create(VM& vm)
 {
     // 1. Let realmRec be a new Realm Record.
     auto realm = vm.heap().allocate_without_realm<Realm>();
 
     // 2. Perform CreateIntrinsics(realmRec).
-    Intrinsics::create(*realm);
+    MUST_OR_THROW_OOM(Intrinsics::create(*realm));
 
     // 3. Set realmRec.[[GlobalObject]] to undefined.
     // 4. Set realmRec.[[GlobalEnv]] to undefined.
@@ -37,7 +37,7 @@ ThrowCompletionOr<NonnullOwnPtr<ExecutionContext>> Realm::initialize_host_define
     DeferGC defer_gc(vm.heap());
 
     // 1. Let realm be CreateRealm().
-    auto realm = Realm::create(vm);
+    auto realm = MUST_OR_THROW_OOM(Realm::create(vm));
 
     // 2. Let newContext be a new execution context.
     auto new_context = make<ExecutionContext>(vm.heap());

Userland/Libraries/LibJS/Runtime/Realm.h

@@ -29,7 +29,7 @@ public:
         virtual void visit_edges(Cell::Visitor&) { }
     };
 
-    static NonnullGCPtr<Realm> create(VM&);
+    static ThrowCompletionOr<NonnullGCPtr<Realm>> create(VM&);
     static ThrowCompletionOr<NonnullOwnPtr<ExecutionContext>> initialize_host_defined_realm(VM&, Function<Object*(Realm&)> create_global_object, Function<Object*(Realm&)> create_global_this_value);
 
     void set_global_object(Object* global_object, Object* this_value);

Userland/Libraries/LibJS/Runtime/ShadowRealmConstructor.cpp

@@ -44,7 +44,7 @@ ThrowCompletionOr<NonnullGCPtr<Object>> ShadowRealmConstructor::construct(Functi
     auto& vm = this->vm();
 
     // 3. Let realmRec be CreateRealm().
-    auto realm = Realm::create(vm);
+    auto realm = MUST_OR_THROW_OOM(Realm::create(vm));
 
     // 5. Let context be a new execution context.
     auto context = ExecutionContext { vm.heap() };