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https://github.com/LadybirdBrowser/ladybird.git
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9ad807d08b
Previously it would pass in `is_arrow_function` as `contains_direct_call_to_eval`, which broke strict mode propagation in arrow functions. This makes test-js work without falling apart because `this` is mysteriously undefined because of the use of arrow functions inside classes, which are strict mode by default.
1107 lines
45 KiB
C++
1107 lines
45 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Gunnar Beutner <gbeutner@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/HashTable.h>
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#include <LibJS/Bytecode/Interpreter.h>
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#include <LibJS/Bytecode/Op.h>
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/BigInt.h>
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#include <LibJS/Runtime/DeclarativeEnvironment.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/Environment.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Iterator.h>
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#include <LibJS/Runtime/IteratorOperations.h>
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#include <LibJS/Runtime/NativeFunction.h>
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#include <LibJS/Runtime/ObjectEnvironment.h>
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#include <LibJS/Runtime/RegExpObject.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS::Bytecode {
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String Instruction::to_string(Bytecode::Executable const& executable) const
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{
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#define __BYTECODE_OP(op) \
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case Instruction::Type::op: \
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return static_cast<Bytecode::Op::op const&>(*this).to_string_impl(executable);
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switch (type()) {
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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default:
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VERIFY_NOT_REACHED();
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}
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#undef __BYTECODE_OP
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}
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}
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namespace JS::Bytecode::Op {
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static ThrowCompletionOr<void> put_by_property_key(Object* object, Value value, PropertyKey name, Bytecode::Interpreter& interpreter, PropertyKind kind)
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{
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if (kind == PropertyKind::Getter || kind == PropertyKind::Setter) {
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// The generator should only pass us functions for getters and setters.
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VERIFY(value.is_function());
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}
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switch (kind) {
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case PropertyKind::Getter: {
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auto& function = value.as_function();
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if (function.name().is_empty() && is<ECMAScriptFunctionObject>(function))
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static_cast<ECMAScriptFunctionObject*>(&function)->set_name(String::formatted("get {}", name));
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object->define_direct_accessor(name, &function, nullptr, Attribute::Configurable | Attribute::Enumerable);
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break;
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}
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case PropertyKind::Setter: {
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auto& function = value.as_function();
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if (function.name().is_empty() && is<ECMAScriptFunctionObject>(function))
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static_cast<ECMAScriptFunctionObject*>(&function)->set_name(String::formatted("set {}", name));
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object->define_direct_accessor(name, nullptr, &function, Attribute::Configurable | Attribute::Enumerable);
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break;
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}
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case PropertyKind::KeyValue:
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TRY(object->set(name, interpreter.accumulator(), Object::ShouldThrowExceptions::Yes));
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break;
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case PropertyKind::Spread:
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TRY(object->copy_data_properties(value, {}, interpreter.global_object()));
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break;
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case PropertyKind::ProtoSetter:
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if (value.is_object() || value.is_null())
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MUST(object->internal_set_prototype_of(value.is_object() ? &value.as_object() : nullptr));
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break;
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}
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return {};
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}
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ThrowCompletionOr<void> Load::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = interpreter.reg(m_src);
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return {};
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}
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ThrowCompletionOr<void> LoadImmediate::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = m_value;
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return {};
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}
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ThrowCompletionOr<void> Store::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.reg(m_dst) = interpreter.accumulator();
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return {};
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}
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static ThrowCompletionOr<Value> abstract_inequals(GlobalObject& global_object, Value src1, Value src2)
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{
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return Value(!TRY(is_loosely_equal(global_object, src1, src2)));
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}
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static ThrowCompletionOr<Value> abstract_equals(GlobalObject& global_object, Value src1, Value src2)
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{
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return Value(TRY(is_loosely_equal(global_object, src1, src2)));
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}
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static ThrowCompletionOr<Value> typed_inequals(GlobalObject&, Value src1, Value src2)
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{
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return Value(!is_strictly_equal(src1, src2));
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}
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static ThrowCompletionOr<Value> typed_equals(GlobalObject&, Value src1, Value src2)
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{
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return Value(is_strictly_equal(src1, src2));
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}
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#define JS_DEFINE_COMMON_BINARY_OP(OpTitleCase, op_snake_case) \
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ThrowCompletionOr<void> OpTitleCase::execute_impl(Bytecode::Interpreter& interpreter) const \
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{ \
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auto lhs = interpreter.reg(m_lhs_reg); \
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auto rhs = interpreter.accumulator(); \
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interpreter.accumulator() = TRY(op_snake_case(interpreter.global_object(), lhs, rhs)); \
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return {}; \
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} \
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String OpTitleCase::to_string_impl(Bytecode::Executable const&) const \
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{ \
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return String::formatted(#OpTitleCase " {}", m_lhs_reg); \
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}
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JS_ENUMERATE_COMMON_BINARY_OPS(JS_DEFINE_COMMON_BINARY_OP)
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static ThrowCompletionOr<Value> not_(GlobalObject&, Value value)
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{
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return Value(!value.to_boolean());
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}
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static ThrowCompletionOr<Value> typeof_(GlobalObject& global_object, Value value)
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{
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return Value(js_string(global_object.vm(), value.typeof()));
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}
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#define JS_DEFINE_COMMON_UNARY_OP(OpTitleCase, op_snake_case) \
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ThrowCompletionOr<void> OpTitleCase::execute_impl(Bytecode::Interpreter& interpreter) const \
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{ \
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interpreter.accumulator() = TRY(op_snake_case(interpreter.global_object(), interpreter.accumulator())); \
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return {}; \
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} \
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String OpTitleCase::to_string_impl(Bytecode::Executable const&) const \
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{ \
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return #OpTitleCase; \
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}
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JS_ENUMERATE_COMMON_UNARY_OPS(JS_DEFINE_COMMON_UNARY_OP)
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ThrowCompletionOr<void> NewBigInt::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = js_bigint(interpreter.vm().heap(), m_bigint);
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return {};
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}
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ThrowCompletionOr<void> NewArray::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto* array = MUST(Array::create(interpreter.global_object(), 0));
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for (size_t i = 0; i < m_element_count; i++) {
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auto& value = interpreter.reg(Register(m_elements[0].index() + i));
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array->indexed_properties().put(i, value, default_attributes);
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}
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interpreter.accumulator() = array;
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return {};
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}
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// FIXME: Since the accumulator is a Value, we store an object there and have to convert back and forth between that an Iterator records. Not great.
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// Make sure to put this into the accumulator before the iterator object disappears from the stack to prevent the members from being GC'd.
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static Object* iterator_to_object(GlobalObject& global_object, Iterator iterator)
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{
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auto& vm = global_object.vm();
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auto* object = Object::create(global_object, nullptr);
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object->define_direct_property(vm.names.iterator, iterator.iterator, 0);
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object->define_direct_property(vm.names.next, iterator.next_method, 0);
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object->define_direct_property(vm.names.done, Value(iterator.done), 0);
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return object;
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}
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static Iterator object_to_iterator(GlobalObject& global_object, Object& object)
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{
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auto& vm = global_object.vm();
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return Iterator {
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.iterator = &MUST(object.get(vm.names.iterator)).as_object(),
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.next_method = MUST(object.get(vm.names.next)),
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.done = MUST(object.get(vm.names.done)).as_bool()
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};
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}
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ThrowCompletionOr<void> IteratorToArray::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& global_object = interpreter.global_object();
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auto iterator_object = TRY(interpreter.accumulator().to_object(global_object));
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auto iterator = object_to_iterator(global_object, *iterator_object);
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auto* array = MUST(Array::create(global_object, 0));
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size_t index = 0;
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while (true) {
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auto* iterator_result = TRY(iterator_next(global_object, iterator));
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auto complete = TRY(iterator_complete(global_object, *iterator_result));
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if (complete) {
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interpreter.accumulator() = array;
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return {};
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}
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auto value = TRY(iterator_value(global_object, *iterator_result));
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MUST(array->create_data_property_or_throw(index, value));
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index++;
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}
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return {};
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}
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ThrowCompletionOr<void> NewString::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = js_string(interpreter.vm(), interpreter.current_executable().get_string(m_string));
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return {};
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}
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ThrowCompletionOr<void> NewObject::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = Object::create(interpreter.global_object(), interpreter.global_object().object_prototype());
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return {};
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}
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ThrowCompletionOr<void> NewRegExp::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto source = interpreter.current_executable().get_string(m_source_index);
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auto flags = interpreter.current_executable().get_string(m_flags_index);
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interpreter.accumulator() = TRY(regexp_create(interpreter.global_object(), js_string(interpreter.vm(), source), js_string(interpreter.vm(), flags)));
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return {};
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}
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ThrowCompletionOr<void> CopyObjectExcludingProperties::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto* from_object = TRY(interpreter.reg(m_from_object).to_object(interpreter.global_object()));
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auto* to_object = Object::create(interpreter.global_object(), interpreter.global_object().object_prototype());
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HashTable<Value, ValueTraits> excluded_names;
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for (size_t i = 0; i < m_excluded_names_count; ++i)
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excluded_names.set(interpreter.reg(m_excluded_names[i]));
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auto own_keys = TRY(from_object->internal_own_property_keys());
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for (auto& key : own_keys) {
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if (!excluded_names.contains(key)) {
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auto property_key = TRY(key.to_property_key(interpreter.global_object()));
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auto property_value = TRY(from_object->get(property_key));
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to_object->define_direct_property(property_key, property_value, JS::default_attributes);
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}
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}
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interpreter.accumulator() = to_object;
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return {};
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}
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ThrowCompletionOr<void> ConcatString::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.reg(m_lhs) = TRY(add(interpreter.global_object(), interpreter.reg(m_lhs), interpreter.accumulator()));
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return {};
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}
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ThrowCompletionOr<void> GetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto get_reference = [&]() -> ThrowCompletionOr<Reference> {
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auto const& string = interpreter.current_executable().get_identifier(m_identifier);
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if (m_cached_environment_coordinate.has_value()) {
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auto* environment = interpreter.vm().running_execution_context().lexical_environment;
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for (size_t i = 0; i < m_cached_environment_coordinate->hops; ++i)
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environment = environment->outer_environment();
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VERIFY(environment);
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VERIFY(environment->is_declarative_environment());
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if (!environment->is_permanently_screwed_by_eval()) {
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return Reference { *environment, string, interpreter.vm().in_strict_mode(), m_cached_environment_coordinate };
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}
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m_cached_environment_coordinate = {};
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}
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auto reference = TRY(interpreter.vm().resolve_binding(string));
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if (reference.environment_coordinate().has_value())
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m_cached_environment_coordinate = reference.environment_coordinate();
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return reference;
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};
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auto reference = TRY(get_reference());
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interpreter.accumulator() = TRY(reference.get_value(interpreter.global_object()));
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return {};
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}
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ThrowCompletionOr<void> DeleteVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto const& string = interpreter.current_executable().get_identifier(m_identifier);
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auto reference = TRY(interpreter.vm().resolve_binding(string));
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interpreter.accumulator() = Value(TRY(reference.delete_(interpreter.global_object())));
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return {};
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}
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ThrowCompletionOr<void> CreateEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto make_and_swap_envs = [&](auto*& old_environment) {
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Environment* environment = new_declarative_environment(*old_environment);
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swap(old_environment, environment);
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return environment;
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};
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if (m_mode == EnvironmentMode::Lexical)
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interpreter.saved_lexical_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().lexical_environment));
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else if (m_mode == EnvironmentMode::Var)
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interpreter.saved_variable_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().variable_environment));
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return {};
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}
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ThrowCompletionOr<void> EnterObjectEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& old_environment = interpreter.vm().running_execution_context().lexical_environment;
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interpreter.saved_lexical_environment_stack().append(old_environment);
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auto object = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
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interpreter.vm().running_execution_context().lexical_environment = new_object_environment(*object, true, old_environment);
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return {};
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}
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ThrowCompletionOr<void> CreateVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& vm = interpreter.vm();
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auto const& name = interpreter.current_executable().get_identifier(m_identifier);
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if (m_mode == EnvironmentMode::Lexical) {
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// Note: This is papering over an issue where "FunctionDeclarationInstantiation" creates these bindings for us.
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// Instead of crashing in there, we'll just raise an exception here.
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if (TRY(vm.lexical_environment()->has_binding(name)))
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return vm.throw_completion<InternalError>(interpreter.global_object(), String::formatted("Lexical environment already has binding '{}'", name));
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if (m_is_immutable)
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vm.lexical_environment()->create_immutable_binding(interpreter.global_object(), name, vm.in_strict_mode());
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else
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vm.lexical_environment()->create_mutable_binding(interpreter.global_object(), name, vm.in_strict_mode());
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} else {
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if (m_is_immutable)
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vm.variable_environment()->create_immutable_binding(interpreter.global_object(), name, vm.in_strict_mode());
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else
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vm.variable_environment()->create_mutable_binding(interpreter.global_object(), name, vm.in_strict_mode());
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}
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return {};
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}
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ThrowCompletionOr<void> SetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& vm = interpreter.vm();
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auto const& name = interpreter.current_executable().get_identifier(m_identifier);
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auto environment = m_mode == EnvironmentMode::Lexical ? vm.running_execution_context().lexical_environment : vm.running_execution_context().variable_environment;
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auto reference = TRY(vm.resolve_binding(name, environment));
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switch (m_initialization_mode) {
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case InitializationMode::Initialize:
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TRY(reference.initialize_referenced_binding(interpreter.global_object(), interpreter.accumulator()));
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break;
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case InitializationMode::Set:
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TRY(reference.put_value(interpreter.global_object(), interpreter.accumulator()));
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break;
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case InitializationMode::InitializeOrSet:
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VERIFY(reference.is_environment_reference());
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VERIFY(reference.base_environment().is_declarative_environment());
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TRY(static_cast<DeclarativeEnvironment&>(reference.base_environment()).initialize_or_set_mutable_binding(interpreter.global_object(), name, interpreter.accumulator()));
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break;
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}
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return {};
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}
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ThrowCompletionOr<void> GetById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto* object = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
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interpreter.accumulator() = TRY(object->get(interpreter.current_executable().get_identifier(m_property)));
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return {};
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}
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ThrowCompletionOr<void> PutById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto* object = TRY(interpreter.reg(m_base).to_object(interpreter.global_object()));
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PropertyKey name = interpreter.current_executable().get_identifier(m_property);
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auto value = interpreter.accumulator();
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return put_by_property_key(object, value, name, interpreter, m_kind);
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}
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ThrowCompletionOr<void> DeleteById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto* object = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
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auto const& identifier = interpreter.current_executable().get_identifier(m_property);
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bool strict = interpreter.vm().in_strict_mode();
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auto reference = Reference { object, identifier, {}, strict };
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interpreter.accumulator() = Value(TRY(reference.delete_(interpreter.global_object())));
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return {};
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};
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ThrowCompletionOr<void> Jump::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.jump(*m_true_target);
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return {};
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}
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ThrowCompletionOr<void> ResolveThisBinding::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = TRY(interpreter.vm().resolve_this_binding(interpreter.global_object()));
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return {};
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}
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ThrowCompletionOr<void> GetNewTarget::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = interpreter.vm().get_new_target();
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return {};
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}
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void Jump::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
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{
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if (m_true_target.has_value() && &m_true_target->block() == &from)
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m_true_target = Label { to };
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if (m_false_target.has_value() && &m_false_target->block() == &from)
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m_false_target = Label { to };
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}
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ThrowCompletionOr<void> JumpConditional::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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VERIFY(m_true_target.has_value());
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VERIFY(m_false_target.has_value());
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auto result = interpreter.accumulator();
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if (result.to_boolean())
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interpreter.jump(m_true_target.value());
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else
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interpreter.jump(m_false_target.value());
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> JumpNullish::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
VERIFY(m_true_target.has_value());
|
|
VERIFY(m_false_target.has_value());
|
|
auto result = interpreter.accumulator();
|
|
if (result.is_nullish())
|
|
interpreter.jump(m_true_target.value());
|
|
else
|
|
interpreter.jump(m_false_target.value());
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> JumpUndefined::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
VERIFY(m_true_target.has_value());
|
|
VERIFY(m_false_target.has_value());
|
|
auto result = interpreter.accumulator();
|
|
if (result.is_undefined())
|
|
interpreter.jump(m_true_target.value());
|
|
else
|
|
interpreter.jump(m_false_target.value());
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Call::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto callee = interpreter.reg(m_callee);
|
|
|
|
if (m_type == CallType::Call && !callee.is_function())
|
|
return interpreter.vm().throw_completion<TypeError>(interpreter.global_object(), ErrorType::IsNotA, callee.to_string_without_side_effects(), "function"sv);
|
|
|
|
if (m_type == CallType::Construct && !callee.is_constructor())
|
|
return interpreter.vm().throw_completion<TypeError>(interpreter.global_object(), ErrorType::IsNotA, callee.to_string_without_side_effects(), "constructor"sv);
|
|
|
|
auto& function = callee.as_function();
|
|
|
|
auto this_value = interpreter.reg(m_this_value);
|
|
|
|
MarkedVector<Value> argument_values { interpreter.vm().heap() };
|
|
for (size_t i = 0; i < m_argument_count; ++i)
|
|
argument_values.append(interpreter.reg(m_arguments[i]));
|
|
|
|
Value return_value;
|
|
if (m_type == CallType::Call)
|
|
return_value = TRY(call(interpreter.global_object(), function, this_value, move(argument_values)));
|
|
else
|
|
return_value = TRY(construct(interpreter.global_object(), function, move(argument_values)));
|
|
|
|
interpreter.accumulator() = return_value;
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> NewFunction::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto& vm = interpreter.vm();
|
|
interpreter.accumulator() = ECMAScriptFunctionObject::create(interpreter.global_object(), m_function_node.name(), m_function_node.source_text(), m_function_node.body(), m_function_node.parameters(), m_function_node.function_length(), vm.lexical_environment(), vm.running_execution_context().private_environment, m_function_node.kind(), m_function_node.is_strict_mode(), m_function_node.might_need_arguments_object(), m_function_node.contains_direct_call_to_eval(), m_function_node.is_arrow_function());
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Return::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
interpreter.do_return(interpreter.accumulator().value_or(js_undefined()));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Increment::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto old_value = TRY(interpreter.accumulator().to_numeric(interpreter.global_object()));
|
|
|
|
if (old_value.is_number())
|
|
interpreter.accumulator() = Value(old_value.as_double() + 1);
|
|
else
|
|
interpreter.accumulator() = js_bigint(interpreter.vm().heap(), old_value.as_bigint().big_integer().plus(Crypto::SignedBigInteger { 1 }));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Decrement::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto old_value = TRY(interpreter.accumulator().to_numeric(interpreter.global_object()));
|
|
|
|
if (old_value.is_number())
|
|
interpreter.accumulator() = Value(old_value.as_double() - 1);
|
|
else
|
|
interpreter.accumulator() = js_bigint(interpreter.vm().heap(), old_value.as_bigint().big_integer().minus(Crypto::SignedBigInteger { 1 }));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Throw::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
return throw_completion(interpreter.accumulator());
|
|
}
|
|
|
|
ThrowCompletionOr<void> EnterUnwindContext::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
interpreter.enter_unwind_context(m_handler_target, m_finalizer_target);
|
|
interpreter.jump(m_entry_point);
|
|
return {};
|
|
}
|
|
|
|
void EnterUnwindContext::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
|
|
{
|
|
if (&m_entry_point.block() == &from)
|
|
m_entry_point = Label { to };
|
|
if (m_handler_target.has_value() && &m_handler_target->block() == &from)
|
|
m_handler_target = Label { to };
|
|
if (m_finalizer_target.has_value() && &m_finalizer_target->block() == &from)
|
|
m_finalizer_target = Label { to };
|
|
}
|
|
|
|
ThrowCompletionOr<void> FinishUnwind::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
interpreter.leave_unwind_context();
|
|
interpreter.jump(m_next_target);
|
|
return {};
|
|
}
|
|
|
|
void FinishUnwind::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
|
|
{
|
|
if (&m_next_target.block() == &from)
|
|
m_next_target = Label { to };
|
|
}
|
|
|
|
ThrowCompletionOr<void> LeaveEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
if (m_mode == EnvironmentMode::Lexical)
|
|
interpreter.vm().running_execution_context().lexical_environment = interpreter.saved_lexical_environment_stack().take_last();
|
|
if (m_mode == EnvironmentMode::Var)
|
|
interpreter.vm().running_execution_context().variable_environment = interpreter.saved_variable_environment_stack().take_last();
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> LeaveUnwindContext::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
interpreter.leave_unwind_context();
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> ContinuePendingUnwind::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
return interpreter.continue_pending_unwind(m_resume_target);
|
|
}
|
|
|
|
void ContinuePendingUnwind::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
|
|
{
|
|
if (&m_resume_target.block() == &from)
|
|
m_resume_target = Label { to };
|
|
}
|
|
|
|
ThrowCompletionOr<void> PushDeclarativeEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* environment = interpreter.vm().heap().allocate_without_global_object<DeclarativeEnvironment>(interpreter.vm().lexical_environment());
|
|
interpreter.vm().running_execution_context().lexical_environment = environment;
|
|
interpreter.vm().running_execution_context().variable_environment = environment;
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> Yield::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto yielded_value = interpreter.accumulator().value_or(js_undefined());
|
|
auto object = JS::Object::create(interpreter.global_object(), nullptr);
|
|
object->define_direct_property("result", yielded_value, JS::default_attributes);
|
|
if (m_continuation_label.has_value())
|
|
object->define_direct_property("continuation", Value(static_cast<double>(reinterpret_cast<u64>(&m_continuation_label->block()))), JS::default_attributes);
|
|
else
|
|
object->define_direct_property("continuation", Value(0), JS::default_attributes);
|
|
interpreter.do_return(object);
|
|
return {};
|
|
}
|
|
|
|
void Yield::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
|
|
{
|
|
if (m_continuation_label.has_value() && &m_continuation_label->block() == &from)
|
|
m_continuation_label = Label { to };
|
|
}
|
|
|
|
ThrowCompletionOr<void> GetByValue::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* object = TRY(interpreter.reg(m_base).to_object(interpreter.global_object()));
|
|
|
|
auto property_key = TRY(interpreter.accumulator().to_property_key(interpreter.global_object()));
|
|
|
|
interpreter.accumulator() = TRY(object->get(property_key));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> PutByValue::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* object = TRY(interpreter.reg(m_base).to_object(interpreter.global_object()));
|
|
|
|
auto property_key = TRY(interpreter.reg(m_property).to_property_key(interpreter.global_object()));
|
|
return put_by_property_key(object, interpreter.accumulator(), property_key, interpreter, m_kind);
|
|
}
|
|
|
|
ThrowCompletionOr<void> DeleteByValue::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* object = TRY(interpreter.reg(m_base).to_object(interpreter.global_object()));
|
|
auto property_key = TRY(interpreter.accumulator().to_property_key(interpreter.global_object()));
|
|
bool strict = interpreter.vm().in_strict_mode();
|
|
auto reference = Reference { object, property_key, {}, strict };
|
|
interpreter.accumulator() = Value(TRY(reference.delete_(interpreter.global_object())));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> GetIterator::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto iterator = TRY(get_iterator(interpreter.global_object(), interpreter.accumulator()));
|
|
interpreter.accumulator() = iterator_to_object(interpreter.global_object(), iterator);
|
|
return {};
|
|
}
|
|
|
|
// 14.7.5.9 EnumerateObjectProperties ( O ), https://tc39.es/ecma262/#sec-enumerate-object-properties
|
|
ThrowCompletionOr<void> GetObjectPropertyIterator::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
// While the spec does provide an algorithm, it allows us to implement it ourselves so long as we meet the following invariants:
|
|
// 1- Returned property keys do not include keys that are Symbols
|
|
// 2- Properties of the target object may be deleted during enumeration. A property that is deleted before it is processed by the iterator's next method is ignored
|
|
// 3- If new properties are added to the target object during enumeration, the newly added properties are not guaranteed to be processed in the active enumeration
|
|
// 4- A property name will be returned by the iterator's next method at most once in any enumeration.
|
|
// 5- Enumerating the properties of the target object includes enumerating properties of its prototype, and the prototype of the prototype, and so on, recursively;
|
|
// but a property of a prototype is not processed if it has the same name as a property that has already been processed by the iterator's next method.
|
|
// 6- The values of [[Enumerable]] attributes are not considered when determining if a property of a prototype object has already been processed.
|
|
// 7- The enumerable property names of prototype objects must be obtained by invoking EnumerateObjectProperties passing the prototype object as the argument.
|
|
// 8- EnumerateObjectProperties must obtain the own property keys of the target object by calling its [[OwnPropertyKeys]] internal method.
|
|
// 9- Property attributes of the target object must be obtained by calling its [[GetOwnProperty]] internal method
|
|
|
|
// Invariant 3 effectively allows the implementation to ignore newly added keys, and we do so (similar to other implementations).
|
|
// Invariants 1 and 6 through 9 are implemented in `enumerable_own_property_names`, which implements the EnumerableOwnPropertyNames AO.
|
|
auto* object = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
|
|
// Note: While the spec doesn't explicitly require these to be ordered, it says that the values should be retrieved via OwnPropertyKeys,
|
|
// so we just keep the order consistent anyway.
|
|
OrderedHashTable<PropertyKey> properties;
|
|
HashTable<Object*> seen_objects;
|
|
// Collect all keys immediately (invariant no. 5)
|
|
for (auto* object_to_check = object; object_to_check && !seen_objects.contains(object_to_check); object_to_check = TRY(object_to_check->internal_get_prototype_of())) {
|
|
seen_objects.set(object_to_check);
|
|
for (auto& key : TRY(object_to_check->enumerable_own_property_names(Object::PropertyKind::Key))) {
|
|
properties.set(TRY(PropertyKey::from_value(interpreter.global_object(), key)));
|
|
}
|
|
}
|
|
Iterator iterator {
|
|
.iterator = object,
|
|
.next_method = NativeFunction::create(
|
|
interpreter.global_object(),
|
|
[seen_items = HashTable<PropertyKey>(), items = move(properties)](VM& vm, GlobalObject& global_object) mutable -> ThrowCompletionOr<Value> {
|
|
auto iterated_object_value = vm.this_value(global_object);
|
|
if (!iterated_object_value.is_object())
|
|
return vm.throw_completion<InternalError>(global_object, "Invalid state for GetObjectPropertyIterator.next");
|
|
|
|
auto& iterated_object = iterated_object_value.as_object();
|
|
auto* result_object = Object::create(global_object, nullptr);
|
|
while (true) {
|
|
if (items.is_empty()) {
|
|
result_object->define_direct_property(vm.names.done, JS::Value(true), default_attributes);
|
|
return result_object;
|
|
}
|
|
|
|
auto it = items.begin();
|
|
auto key = *it;
|
|
items.remove(it);
|
|
|
|
// If the key was already seen, skip over it (invariant no. 4)
|
|
auto result = seen_items.set(key);
|
|
if (result != AK::HashSetResult::InsertedNewEntry)
|
|
continue;
|
|
|
|
// If the property is deleted, don't include it (invariant no. 2)
|
|
if (!TRY(iterated_object.has_property(key)))
|
|
continue;
|
|
|
|
result_object->define_direct_property(vm.names.done, JS::Value(false), default_attributes);
|
|
|
|
if (key.is_number())
|
|
result_object->define_direct_property(vm.names.value, JS::Value(key.as_number()), default_attributes);
|
|
else if (key.is_string())
|
|
result_object->define_direct_property(vm.names.value, js_string(vm.heap(), key.as_string()), default_attributes);
|
|
else
|
|
VERIFY_NOT_REACHED(); // We should not have non-string/number keys.
|
|
|
|
return result_object;
|
|
}
|
|
},
|
|
1,
|
|
interpreter.vm().names.next),
|
|
.done = false,
|
|
};
|
|
interpreter.accumulator() = iterator_to_object(interpreter.global_object(), move(iterator));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> IteratorNext::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* iterator_object = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
|
|
auto iterator = object_to_iterator(interpreter.global_object(), *iterator_object);
|
|
|
|
interpreter.accumulator() = TRY(iterator_next(interpreter.global_object(), iterator));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> IteratorResultDone::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* iterator_result = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
|
|
|
|
auto complete = TRY(iterator_complete(interpreter.global_object(), *iterator_result));
|
|
interpreter.accumulator() = Value(complete);
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> IteratorResultValue::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto* iterator_result = TRY(interpreter.accumulator().to_object(interpreter.global_object()));
|
|
|
|
interpreter.accumulator() = TRY(iterator_value(interpreter.global_object(), *iterator_result));
|
|
return {};
|
|
}
|
|
|
|
ThrowCompletionOr<void> NewClass::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
auto name = m_class_expression.name();
|
|
auto scope = interpreter.ast_interpreter_scope();
|
|
auto& ast_interpreter = scope.interpreter();
|
|
auto class_object = TRY(m_class_expression.class_definition_evaluation(ast_interpreter, interpreter.global_object(), name, name.is_null() ? "" : name));
|
|
interpreter.accumulator() = class_object;
|
|
return {};
|
|
}
|
|
|
|
// 13.5.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-typeof-operator-runtime-semantics-evaluation
|
|
ThrowCompletionOr<void> TypeofVariable::execute_impl(Bytecode::Interpreter& interpreter) const
|
|
{
|
|
// 1. Let val be the result of evaluating UnaryExpression.
|
|
auto const& string = interpreter.current_executable().get_identifier(m_identifier);
|
|
auto reference = TRY(interpreter.vm().resolve_binding(string));
|
|
|
|
// 2. If val is a Reference Record, then
|
|
// a. If IsUnresolvableReference(val) is true, return "undefined".
|
|
if (reference.is_unresolvable()) {
|
|
interpreter.accumulator() = js_string(interpreter.vm(), "undefined"sv);
|
|
return {};
|
|
}
|
|
|
|
// 3. Set val to ? GetValue(val).
|
|
auto value = TRY(reference.get_value(interpreter.global_object()));
|
|
|
|
// 4. NOTE: This step is replaced in section B.3.6.3.
|
|
// 5. Return a String according to Table 41.
|
|
interpreter.accumulator() = js_string(interpreter.vm(), value.typeof());
|
|
return {};
|
|
}
|
|
|
|
String Load::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("Load {}", m_src);
|
|
}
|
|
|
|
String LoadImmediate::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("LoadImmediate {}", m_value);
|
|
}
|
|
|
|
String Store::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("Store {}", m_dst);
|
|
}
|
|
|
|
String NewBigInt::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("NewBigInt \"{}\"", m_bigint.to_base(10));
|
|
}
|
|
|
|
String NewArray::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
StringBuilder builder;
|
|
builder.append("NewArray");
|
|
if (m_element_count != 0) {
|
|
builder.appendff(" [{}-{}]", m_elements[0], m_elements[1]);
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
String IteratorToArray::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "IteratorToArray";
|
|
}
|
|
|
|
String NewString::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("NewString {} (\"{}\")", m_string, executable.string_table->get(m_string));
|
|
}
|
|
|
|
String NewObject::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "NewObject";
|
|
}
|
|
|
|
String NewRegExp::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("NewRegExp source:{} (\"{}\") flags:{} (\"{}\")", m_source_index, executable.get_string(m_source_index), m_flags_index, executable.get_string(m_flags_index));
|
|
}
|
|
|
|
String CopyObjectExcludingProperties::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
StringBuilder builder;
|
|
builder.appendff("CopyObjectExcludingProperties from:{}", m_from_object);
|
|
if (m_excluded_names_count != 0) {
|
|
builder.append(" excluding:[");
|
|
for (size_t i = 0; i < m_excluded_names_count; ++i) {
|
|
builder.appendff("{}", m_excluded_names[i]);
|
|
if (i != m_excluded_names_count - 1)
|
|
builder.append(',');
|
|
}
|
|
builder.append(']');
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
String ConcatString::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("ConcatString {}", m_lhs);
|
|
}
|
|
|
|
String GetVariable::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("GetVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
|
|
}
|
|
|
|
String DeleteVariable::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("DeleteVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
|
|
}
|
|
|
|
String CreateEnvironment::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto mode_string = m_mode == EnvironmentMode::Lexical
|
|
? "Lexical"
|
|
: "Variable";
|
|
return String::formatted("CreateEnvironment mode:{}", mode_string);
|
|
}
|
|
|
|
String CreateVariable::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
auto mode_string = m_mode == EnvironmentMode::Lexical ? "Lexical" : "Variable";
|
|
return String::formatted("CreateVariable env:{} immutable:{} {} ({})", mode_string, m_is_immutable, m_identifier, executable.identifier_table->get(m_identifier));
|
|
}
|
|
|
|
String EnterObjectEnvironment::to_string_impl(Executable const&) const
|
|
{
|
|
return String::formatted("EnterObjectEnvironment");
|
|
}
|
|
|
|
String SetVariable::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
auto initialization_mode_name = m_initialization_mode == InitializationMode ::Initialize ? "Initialize"
|
|
: m_initialization_mode == InitializationMode::Set ? "Set"
|
|
: "InitializeOrSet";
|
|
auto mode_string = m_mode == EnvironmentMode::Lexical ? "Lexical" : "Variable";
|
|
return String::formatted("SetVariable env:{} init:{} {} ({})", mode_string, initialization_mode_name, m_identifier, executable.identifier_table->get(m_identifier));
|
|
}
|
|
|
|
String PutById::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
auto kind = m_kind == PropertyKind::Getter
|
|
? "getter"
|
|
: m_kind == PropertyKind::Setter
|
|
? "setter"
|
|
: "property";
|
|
|
|
return String::formatted("PutById kind:{} base:{}, property:{} ({})", kind, m_base, m_property, executable.identifier_table->get(m_property));
|
|
}
|
|
|
|
String GetById::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("GetById {} ({})", m_property, executable.identifier_table->get(m_property));
|
|
}
|
|
|
|
String DeleteById::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("DeleteById {} ({})", m_property, executable.identifier_table->get(m_property));
|
|
}
|
|
|
|
String Jump::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
if (m_true_target.has_value())
|
|
return String::formatted("Jump {}", *m_true_target);
|
|
return String::formatted("Jump <empty>");
|
|
}
|
|
|
|
String JumpConditional::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto true_string = m_true_target.has_value() ? String::formatted("{}", *m_true_target) : "<empty>";
|
|
auto false_string = m_false_target.has_value() ? String::formatted("{}", *m_false_target) : "<empty>";
|
|
return String::formatted("JumpConditional true:{} false:{}", true_string, false_string);
|
|
}
|
|
|
|
String JumpNullish::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto true_string = m_true_target.has_value() ? String::formatted("{}", *m_true_target) : "<empty>";
|
|
auto false_string = m_false_target.has_value() ? String::formatted("{}", *m_false_target) : "<empty>";
|
|
return String::formatted("JumpNullish null:{} nonnull:{}", true_string, false_string);
|
|
}
|
|
|
|
String JumpUndefined::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto true_string = m_true_target.has_value() ? String::formatted("{}", *m_true_target) : "<empty>";
|
|
auto false_string = m_false_target.has_value() ? String::formatted("{}", *m_false_target) : "<empty>";
|
|
return String::formatted("JumpUndefined undefined:{} not undefined:{}", true_string, false_string);
|
|
}
|
|
|
|
String Call::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
StringBuilder builder;
|
|
builder.appendff("Call callee:{}, this:{}", m_callee, m_this_value);
|
|
if (m_argument_count != 0) {
|
|
builder.append(", arguments:[");
|
|
for (size_t i = 0; i < m_argument_count; ++i) {
|
|
builder.appendff("{}", m_arguments[i]);
|
|
if (i != m_argument_count - 1)
|
|
builder.append(',');
|
|
}
|
|
builder.append(']');
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
String NewFunction::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "NewFunction";
|
|
}
|
|
|
|
String NewClass::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "NewClass";
|
|
}
|
|
|
|
String Return::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "Return";
|
|
}
|
|
|
|
String Increment::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "Increment";
|
|
}
|
|
|
|
String Decrement::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "Decrement";
|
|
}
|
|
|
|
String Throw::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "Throw";
|
|
}
|
|
|
|
String EnterUnwindContext::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto handler_string = m_handler_target.has_value() ? String::formatted("{}", *m_handler_target) : "<empty>";
|
|
auto finalizer_string = m_finalizer_target.has_value() ? String::formatted("{}", *m_finalizer_target) : "<empty>";
|
|
return String::formatted("EnterUnwindContext handler:{} finalizer:{} entry:{}", handler_string, finalizer_string, m_entry_point);
|
|
}
|
|
|
|
String FinishUnwind::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("FinishUnwind next:{}", m_next_target);
|
|
}
|
|
|
|
String LeaveEnvironment::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto mode_string = m_mode == EnvironmentMode::Lexical
|
|
? "Lexical"
|
|
: "Variable";
|
|
return String::formatted("LeaveEnvironment env:{}", mode_string);
|
|
}
|
|
|
|
String LeaveUnwindContext::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "LeaveUnwindContext";
|
|
}
|
|
|
|
String ContinuePendingUnwind::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("ContinuePendingUnwind resume:{}", m_resume_target);
|
|
}
|
|
|
|
String PushDeclarativeEnvironment::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
StringBuilder builder;
|
|
builder.append("PushDeclarativeEnvironment");
|
|
if (!m_variables.is_empty()) {
|
|
builder.append(" {");
|
|
Vector<String> names;
|
|
for (auto& it : m_variables)
|
|
names.append(executable.get_string(it.key));
|
|
builder.join(", ", names);
|
|
builder.append("}");
|
|
}
|
|
return builder.to_string();
|
|
}
|
|
|
|
String Yield::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
if (m_continuation_label.has_value())
|
|
return String::formatted("Yield continuation:@{}", m_continuation_label->block().name());
|
|
return String::formatted("Yield return");
|
|
}
|
|
|
|
String GetByValue::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("GetByValue base:{}", m_base);
|
|
}
|
|
|
|
String PutByValue::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
auto kind = m_kind == PropertyKind::Getter
|
|
? "getter"
|
|
: m_kind == PropertyKind::Setter
|
|
? "setter"
|
|
: "property";
|
|
|
|
return String::formatted("PutByValue kind:{} base:{}, property:{}", kind, m_base, m_property);
|
|
}
|
|
|
|
String DeleteByValue::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return String::formatted("DeleteByValue base:{}", m_base);
|
|
}
|
|
|
|
String GetIterator::to_string_impl(Executable const&) const
|
|
{
|
|
return "GetIterator";
|
|
}
|
|
|
|
String GetObjectPropertyIterator::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "GetObjectPropertyIterator";
|
|
}
|
|
|
|
String IteratorNext::to_string_impl(Executable const&) const
|
|
{
|
|
return "IteratorNext";
|
|
}
|
|
|
|
String IteratorResultDone::to_string_impl(Executable const&) const
|
|
{
|
|
return "IteratorResultDone";
|
|
}
|
|
|
|
String IteratorResultValue::to_string_impl(Executable const&) const
|
|
{
|
|
return "IteratorResultValue";
|
|
}
|
|
|
|
String ResolveThisBinding::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "ResolveThisBinding"sv;
|
|
}
|
|
|
|
String GetNewTarget::to_string_impl(Bytecode::Executable const&) const
|
|
{
|
|
return "GetNewTarget"sv;
|
|
}
|
|
|
|
String TypeofVariable::to_string_impl(Bytecode::Executable const& executable) const
|
|
{
|
|
return String::formatted("TypeofVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
|
|
}
|
|
|
|
}
|