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LibJS: Bring ArrayCreate and ArrayConstructor closer to spec

Browse source 
Specifically, this now explicitly takes the length, adds missing
exceptions checks to calls with user-supplied lengths, takes and uses
the prototype argument, and fixes some spec non-conformance in
ArrayConstructor and its native functions around the use of ArrayCreate
This commit is contained in:
Idan Horowitz 2021-07-04 01:36:44 +03:00 • committed by Linus Groh
parent 5ee1ae37b2
commit e480d69130
17 changed files with 172 additions and 96 deletions
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6
Userland/Libraries/LibJS/AST.cpp
View file

@ -1992,7 +1992,7 @@ Value ArrayExpression::execute(Interpreter& interpreter, GlobalObject& global_ob
{
InterpreterNodeScope node_scope { interpreter, *this };
auto* array = Array::create(global_object);
auto* array = Array::create(global_object, 0);
for (auto& element : m_elements) {
auto value = Value();
if (element) {
@ -2066,7 +2066,7 @@ Value TaggedTemplateLiteral::execute(Interpreter& interpreter, GlobalObject& glo
}
auto& tag_function = tag.as_function();
auto& expressions = m_template_literal->expressions();
auto* strings = Array::create(global_object);
auto* strings = Array::create(global_object, 0);
MarkedValueList arguments(vm.heap());
arguments.append(strings);
for (size_t i = 0; i < expressions.size(); ++i) {
@ -2082,7 +2082,7 @@ Value TaggedTemplateLiteral::execute(Interpreter& interpreter, GlobalObject& glo
}
}
auto* raw_strings = Array::create(global_object);
auto* raw_strings = Array::create(global_object, 0);
for (auto& raw_string : m_template_literal->raw_strings()) {
auto value = raw_string.execute(interpreter, global_object);
if (vm.exception())

2
Userland/Libraries/LibJS/Bytecode/Op.cpp
View file

@ -134,7 +134,7 @@ void IteratorToArray::execute_impl(Bytecode::Interpreter& interpreter) const
if (vm.exception())
return;
auto array = Array::create(global_object);
auto array = Array::create(global_object, 0);
size_t index = 0;
while (true) {

13
Userland/Libraries/LibJS/Runtime/Array.cpp
View file

@ -13,23 +13,24 @@
namespace JS {
// 10.4.2.2 ArrayCreate ( length [ , proto ] ), https://tc39.es/ecma262/#sec-arraycreate
Array* Array::create(GlobalObject& global_object, size_t length)
Array* Array::create(GlobalObject& global_object, size_t length, Object* prototype)
{
// FIXME: Support proto parameter
auto& vm = global_object.vm();
if (length > NumericLimits<u32>::max()) {
auto& vm = global_object.vm();
vm.throw_exception<RangeError>(global_object, ErrorType::InvalidLength, "array");
return nullptr;
}
auto* array = global_object.heap().allocate<Array>(global_object, *global_object.array_prototype());
array->indexed_properties().set_array_like_size(length);
if (!prototype)
prototype = global_object.array_prototype();
auto* array = global_object.heap().allocate<Array>(global_object, *prototype);
array->put(vm.names.length, Value(length));
return array;
}
// 7.3.17 CreateArrayFromList ( elements ), https://tc39.es/ecma262/#sec-createarrayfromlist
Array* Array::create_from(GlobalObject& global_object, const Vector<Value>& elements)
{
auto* array = Array::create(global_object);
auto* array = Array::create(global_object, 0);
for (size_t i = 0; i < elements.size(); ++i)
array->define_property(i, elements[i]);
return array;

2
Userland/Libraries/LibJS/Runtime/Array.h
View file

@ -14,7 +14,7 @@ class Array : public Object {
JS_OBJECT(Array, Object);
public:
static Array* create(GlobalObject&, size_t length = 0);
static Array* create(GlobalObject&, size_t length, Object* prototype = nullptr);
static Array* create_from(GlobalObject&, const Vector<Value>&);
explicit Array(Object& prototype);

201
Userland/Libraries/LibJS/Runtime/ArrayConstructor.cpp
View file

@ -6,7 +6,7 @@
*/
#include <AK/Function.h>
#include <LibJS/Heap/Heap.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/ArrayConstructor.h>
#include <LibJS/Runtime/Error.h>
@ -47,42 +47,53 @@ void ArrayConstructor::initialize(GlobalObject& global_object)
// 23.1.1.1 Array ( ...values ), https://tc39.es/ecma262/#sec-array
Value ArrayConstructor::call()
{
if (vm().argument_count() <= 0)
return Array::create(global_object());
if (vm().argument_count() == 1 && vm().argument(0).is_number()) {
auto length = vm().argument(0);
auto int_length = length.to_u32(global_object());
if (int_length != length.as_double()) {
vm().throw_exception<RangeError>(global_object(), ErrorType::InvalidLength, "array");
return {};
}
auto* array = Array::create(global_object());
array->indexed_properties().set_array_like_size(int_length);
return array;
}
auto* array = Array::create(global_object());
for (size_t i = 0; i < vm().argument_count(); ++i)
array->indexed_properties().append(vm().argument(i));
return array;
return construct(*this);
}
// 23.1.1.1 Array ( ...values ), https://tc39.es/ecma262/#sec-array
Value ArrayConstructor::construct(FunctionObject&)
Value ArrayConstructor::construct(FunctionObject& new_target)
{
return call();
auto& vm = this->vm();
auto* proto = get_prototype_from_constructor(global_object(), new_target, &GlobalObject::array_prototype);
if (vm.exception())
return {};
if (vm.argument_count() == 0)
return Array::create(global_object(), 0, proto);
if (vm.argument_count() == 1) {
auto length = vm.argument(0);
auto* array = Array::create(global_object(), 0, proto);
size_t int_length;
if (!length.is_number()) {
array->define_property(0, length);
int_length = 1;
} else {
int_length = length.to_u32(global_object());
if (int_length != length.as_double()) {
vm.throw_exception<RangeError>(global_object(), ErrorType::InvalidLength, "array");
return {};
}
}
array->put(vm.names.length, Value(int_length));
return array;
}
auto* array = Array::create(global_object(), vm.argument_count(), proto);
if (vm.exception())
return {};
for (size_t k = 0; k < vm.argument_count(); ++k)
array->define_property(k, vm.argument(k));
return array;
}
// 23.1.2.1 Array.from ( items [ , mapfn [ , thisArg ] ] ), https://tc39.es/ecma262/#sec-array.from
JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
{
auto value = vm.argument(0);
auto object = value.to_object(global_object);
if (!object)
return {};
auto* array = Array::create(global_object);
auto constructor = vm.this_value(global_object);
FunctionObject* map_fn = nullptr;
if (!vm.argument(1).is_undefined()) {
@ -96,53 +107,107 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
auto this_arg = vm.argument(2);
// Array.from() lets you create Arrays from:
if (auto size = object->indexed_properties().array_like_size()) {
// * array-like objects (objects with a length property and indexed elements)
MarkedValueList elements(vm.heap());
elements.ensure_capacity(size);
for (size_t i = 0; i < size; ++i) {
if (map_fn) {
auto element = object->get(i);
if (vm.exception())
return {};
auto map_fn_result = vm.call(*map_fn, this_arg, element, Value((i32)i));
if (vm.exception())
return {};
elements.append(map_fn_result);
} else {
elements.append(object->get(i));
if (vm.exception())
return {};
}
}
array->set_indexed_property_elements(move(elements));
} else {
// * iterable objects
i32 i = 0;
get_iterator_values(global_object, value, [&](Value element) {
auto items = vm.argument(0);
auto using_iterator = items.get_method(global_object, *vm.well_known_symbol_iterator());
if (vm.exception())
return {};
if (using_iterator) {
Value array;
if (constructor.is_constructor()) {
array = vm.construct(constructor.as_function(), constructor.as_function(), {});
if (vm.exception())
return IterationDecision::Break;
return {};
} else {
array = Array::create(global_object, 0);
}
auto iterator = get_iterator(global_object, items, IteratorHint::Sync, using_iterator);
if (vm.exception())
return {};
if (map_fn) {
auto map_fn_result = vm.call(*map_fn, this_arg, element, Value(i));
i++;
if (vm.exception())
return IterationDecision::Break;
auto& array_object = array.as_object();
array->indexed_properties().append(map_fn_result);
} else {
array->indexed_properties().append(element);
size_t k = 0;
while (true) {
if (k >= MAX_ARRAY_LIKE_INDEX) {
vm.throw_exception<TypeError>(global_object, ErrorType::ArrayMaxSize);
iterator_close(*iterator);
return {};
}
return IterationDecision::Continue;
});
auto next = iterator_step(global_object, *iterator);
if (vm.exception())
return {};
if (!next) {
array_object.put(vm.names.length, Value(k));
if (vm.exception())
return {};
return array;
}
auto next_value = iterator_value(global_object, *next);
if (vm.exception())
return {};
Value mapped_value;
if (map_fn) {
mapped_value = vm.call(*map_fn, this_arg, next_value, Value(k));
if (vm.exception()) {
iterator_close(*iterator);
return {};
}
} else {
mapped_value = next_value;
}
array_object.define_property(k, mapped_value);
if (vm.exception()) {
iterator_close(*iterator);
return {};
}
++k;
}
}
auto* array_like = items.to_object(global_object);
auto length = length_of_array_like(global_object, *array_like);
if (vm.exception())
return {};
Value array;
if (constructor.is_constructor()) {
MarkedValueList arguments(vm.heap());
arguments.empend(length);
array = vm.construct(constructor.as_function(), constructor.as_function(), move(arguments));
if (vm.exception())
return {};
} else {
array = Array::create(global_object, length);
if (vm.exception())
return {};
}
auto& array_object = array.as_object();
for (size_t k = 0; k < length; ++k) {
auto k_value = array_like->get(k);
Value mapped_value;
if (map_fn) {
mapped_value = vm.call(*map_fn, this_arg, k_value, Value(k));
if (vm.exception())
return {};
} else {
mapped_value = k_value;
}
array_object.define_property(k, mapped_value);
}
array_object.put(vm.names.length, Value(length));
if (vm.exception())
return {};
return array;
}
@ -165,7 +230,9 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::of)
if (vm.exception())
return {};
} else {
array = Array::create(global_object);
array = Array::create(global_object, vm.argument_count());
if (vm.exception())
return {};
}
auto& array_object = array.as_object();
for (size_t k = 0; k < vm.argument_count(); ++k) {

2
Userland/Libraries/LibJS/Runtime/ArrayIteratorPrototype.cpp
View file

@ -87,7 +87,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayIteratorPrototype::next)
if (iteration_kind == Object::PropertyKind::Value)
return create_iterator_result_object(global_object, value, false);
auto* entry_array = Array::create(global_object);
auto* entry_array = Array::create(global_object, 0);
entry_array->define_property(0, Value(static_cast<i32>(index)));
entry_array->define_property(1, value);
return create_iterator_result_object(global_object, entry_array, false);

16
Userland/Libraries/LibJS/Runtime/ArrayPrototype.cpp
View file

@ -151,8 +151,12 @@ static Object* array_species_create(GlobalObject& global_object, Object& origina
{
auto& vm = global_object.vm();
if (!Value(&original_array).is_array(global_object))
return Array::create(global_object, length);
if (!Value(&original_array).is_array(global_object)) {
auto array = Array::create(global_object, length);
if (vm.exception())
return {};
return array;
}
auto constructor = original_array.get(vm.names.constructor).value_or(js_undefined());
if (vm.exception())
@ -176,8 +180,12 @@ static Object* array_species_create(GlobalObject& global_object, Object& origina
constructor = js_undefined();
}
if (constructor.is_undefined())
return Array::create(global_object, length);
if (constructor.is_undefined()) {
auto array = Array::create(global_object, length);
if (vm.exception())
return {};
return array;
}
if (!constructor.is_constructor()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAConstructor, constructor.to_string_without_side_effects());

2
Userland/Libraries/LibJS/Runtime/JSONObject.cpp
View file

@ -467,7 +467,7 @@ Object* JSONObject::parse_json_object(GlobalObject& global_object, const JsonObj
Array* JSONObject::parse_json_array(GlobalObject& global_object, const JsonArray& json_array)
{
auto* array = Array::create(global_object);
auto* array = Array::create(global_object, 0);
size_t index = 0;
json_array.for_each([&](auto& value) {
array->define_property(index++, parse_json_value(global_object, value));

2
Userland/Libraries/LibJS/Runtime/MapIteratorPrototype.cpp
View file

@ -59,7 +59,7 @@ JS_DEFINE_NATIVE_FUNCTION(MapIteratorPrototype::next)
else if (iteration_kind == Object::PropertyKind::Value)
return create_iterator_result_object(global_object, entry.value, false);
auto* entry_array = Array::create(global_object);
auto* entry_array = Array::create(global_object, 0);
entry_array->define_property(0, entry.key);
entry_array->define_property(1, entry.value);
return create_iterator_result_object(global_object, entry_array, false);

6
Userland/Libraries/LibJS/Runtime/Object.cpp
View file

@ -297,7 +297,7 @@ MarkedValueList Object::get_own_properties(PropertyKind kind, bool only_enumerab
} else if (kind == PropertyKind::Value) {
properties.append(js_string(vm(), String::formatted("{:c}", str[i])));
} else {
auto* entry_array = Array::create(global_object());
auto* entry_array = Array::create(global_object(), 0);
entry_array->define_property(0, js_string(vm(), String::number(i)));
entry_array->define_property(1, js_string(vm(), String::formatted("{:c}", str[i])));
properties.append(entry_array);
@ -318,7 +318,7 @@ MarkedValueList Object::get_own_properties(PropertyKind kind, bool only_enumerab
} else if (kind == PropertyKind::Value) {
properties.append(value_and_attributes.value);
} else {
auto* entry_array = Array::create(global_object());
auto* entry_array = Array::create(global_object(), 0);
entry_array->define_property(0, js_string(vm(), String::number(entry.index())));
entry_array->define_property(1, value_and_attributes.value);
properties.append(entry_array);
@ -341,7 +341,7 @@ MarkedValueList Object::get_own_properties(PropertyKind kind, bool only_enumerab
if (val.is_empty())
return;
auto* entry_array = Array::create(global_object());
auto* entry_array = Array::create(global_object(), 0);
entry_array->define_property(0, property.key.to_value(vm()));
entry_array->define_property(1, val);
properties.append(entry_array);

2
Userland/Libraries/LibJS/Runtime/OrdinaryFunctionObject.cpp
View file

@ -166,7 +166,7 @@ Value OrdinaryFunctionObject::execute_function_body()
[&](const auto& param) {
Value argument_value;
if (parameter.is_rest) {
auto* array = Array::create(global_object());
auto* array = Array::create(global_object(), 0);
for (size_t rest_index = i; rest_index < execution_context_arguments.size(); ++rest_index)
array->indexed_properties().append(execution_context_arguments[rest_index]);
argument_value = move(array);

4
Userland/Libraries/LibJS/Runtime/ProxyObject.cpp
View file

@ -431,7 +431,7 @@ Value ProxyObject::call()
arguments.append(Value(&m_target));
arguments.append(Value(&m_handler));
// FIXME: Pass global object
auto arguments_array = Array::create(global_object());
auto arguments_array = Array::create(global_object(), 0);
vm.for_each_argument([&](auto& argument) {
arguments_array->indexed_properties().append(argument);
});
@ -458,7 +458,7 @@ Value ProxyObject::construct(FunctionObject& new_target)
return static_cast<FunctionObject&>(m_target).construct(new_target);
MarkedValueList arguments(vm.heap());
arguments.append(Value(&m_target));
auto arguments_array = Array::create(global_object());
auto arguments_array = Array::create(global_object(), 0);
vm.for_each_argument([&](auto& argument) {
arguments_array->indexed_properties().append(argument);
});

2
Userland/Libraries/LibJS/Runtime/SetIteratorPrototype.cpp
View file

@ -61,7 +61,7 @@ JS_DEFINE_NATIVE_FUNCTION(SetIteratorPrototype::next)
if (iteration_kind == Object::PropertyKind::Value)
return create_iterator_result_object(global_object, value, false);
auto* entry_array = Array::create(global_object);
auto* entry_array = Array::create(global_object, 0);
entry_array->define_property(0, value);
entry_array->define_property(1, value);
return create_iterator_result_object(global_object, entry_array, false);

2
Userland/Libraries/LibJS/Runtime/StringPrototype.cpp
View file

@ -592,7 +592,7 @@ JS_DEFINE_NATIVE_FUNCTION(StringPrototype::split)
auto string = this_value.to_string(global_object);
auto* result = Array::create(global_object);
auto* result = Array::create(global_object, 0);
size_t result_len = 0;
auto limit = NumericLimits<u32>::max();

2
Userland/Libraries/LibJS/Runtime/VM.cpp
View file

@ -218,7 +218,7 @@ void VM::assign(const NonnullRefPtr<BindingPattern>& target, Value value, Global
if (entry.is_rest) {
VERIFY(i == binding.entries.size() - 1);
auto* array = Array::create(global_object);
auto* array = Array::create(global_object, 0);
for (;;) {
auto next_object = iterator_next(*iterator);
if (!next_object)

2
Userland/Libraries/LibWeb/Bindings/NavigatorObject.cpp
View file

@ -21,7 +21,7 @@ NavigatorObject::NavigatorObject(JS::GlobalObject& global_object)
void NavigatorObject::initialize(JS::GlobalObject& global_object)
{
auto& heap = this->heap();
auto* languages = JS::Array::create(global_object);
auto* languages = JS::Array::create(global_object, 0);
languages->indexed_properties().append(js_string(heap, "en-US"));
define_property("appCodeName", js_string(heap, "Mozilla"));

2
Userland/Libraries/LibWeb/CodeGenerators/WrapperGenerator.cpp
View file

@ -1401,7 +1401,7 @@ static @fully_qualified_name@* impl_from(JS::VM& vm, JS::GlobalObject& global_ob
// FIXME: Remove this fake type hack once it's no longer needed.
// Basically once we have NodeList we can throw this out.
scoped_generator.append(R"~~~(
auto* new_array = JS::Array::create(global_object);
auto* new_array = JS::Array::create(global_object, 0);
for (auto& element : retval)
new_array->indexed_properties().append(wrap(global_object, element));