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LibJS: Make intrinsics getters return NonnullGCPtr

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Some of these are allocated upon initialization of the intrinsics, and
some lazily, but in neither case the getters actually return a nullptr.

This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has
an `operator T&()`), and also has the interesting side effect of forcing
us to explicitly use the FunctionObject& overload of call(), as passing
a NonnullGCPtr is ambigous - it could implicitly be turned into a Value
_or_ a FunctionObject& (so we have to dereference manually).
This commit is contained in:
Linus Groh 2023-04-13 00:47:15 +02:00
parent ed9e2366da
commit b84f8fb55b
182 changed files with 564 additions and 567 deletions
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16
Userland/Libraries/LibJS/Runtime/Intrinsics.cpp
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@ -302,18 +302,18 @@ JS_ENUMERATE_TYPED_ARRAYS
initialize_constructor(vm, vm.names.ClassName, *m_##snake_namespace##snake_name##_constructor, m_##snake_namespace##snake_name##_prototype); \
} \
\
Namespace::ConstructorName* Intrinsics::snake_namespace##snake_name##_constructor() \
NonnullGCPtr<Namespace::ConstructorName> Intrinsics::snake_namespace##snake_name##_constructor() \
{ \
if (!m_##snake_namespace##snake_name##_constructor) \
initialize_##snake_namespace##snake_name(); \
return m_##snake_namespace##snake_name##_constructor; \
return *m_##snake_namespace##snake_name##_constructor; \
} \
\
Object* Intrinsics::snake_namespace##snake_name##_prototype() \
NonnullGCPtr<Object> Intrinsics::snake_namespace##snake_name##_prototype() \
{ \
if (!m_##snake_namespace##snake_name##_prototype) \
initialize_##snake_namespace##snake_name(); \
return m_##snake_namespace##snake_name##_prototype; \
return *m_##snake_namespace##snake_name##_prototype; \
}
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
@ -334,11 +334,11 @@ JS_ENUMERATE_TEMPORAL_OBJECTS
#undef __JS_ENUMERATE_INNER
#define __JS_ENUMERATE(ClassName, snake_name) \
ClassName* Intrinsics::snake_name##_object() \
NonnullGCPtr<ClassName> Intrinsics::snake_name##_object() \
{ \
if (!m_##snake_name##_object) \
m_##snake_name##_object = heap().allocate<ClassName>(m_realm, m_realm).release_allocated_value_but_fixme_should_propagate_errors(); \
return m_##snake_name##_object; \
return *m_##snake_name##_object; \
}
JS_ENUMERATE_BUILTIN_NAMESPACE_OBJECTS
#undef __JS_ENUMERATE
@ -397,10 +397,10 @@ void add_restricted_function_properties(FunctionObject& function, Realm& realm)
auto& vm = realm.vm();
// 1. Assert: realm.[[Intrinsics]].[[%ThrowTypeError%]] exists and has been initialized.
VERIFY(realm.intrinsics().throw_type_error_function());
// NOTE: This is ensured by dereferencing the GCPtr in the getter.
// 2. Let thrower be realm.[[Intrinsics]].[[%ThrowTypeError%]].
auto* thrower = realm.intrinsics().throw_type_error_function();
auto thrower = realm.intrinsics().throw_type_error_function();
// 3. Perform ! DefinePropertyOrThrow(F, "caller", PropertyDescriptor { [[Get]]: thrower, [[Set]]: thrower, [[Enumerable]]: false, [[Configurable]]: true }).
function.define_direct_accessor(vm.names.caller, thrower, thrower, Attribute::Configurable);