317b88a8c3
This now matches the spec's OrdinaryObjectCreate() across the board: instead of implicitly setting the created object's prototype to %Object.prototype% and then in many cases setting it to a nullptr right away, it now has an 'Object* prototype' parameter with _no default value_. This makes the code easier to compare with the spec, very clear in terms of what prototype is being used as well as avoiding unnecessary shape transitions. Also fixes a couple of cases were we weren't setting the correct prototype. There's no reason to assume that the object would not be empty (as in having own properties), so let's follow our existing pattern of Type::create(...) and simply call it 'create'.
537 lines
19 KiB
C++
537 lines
19 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, 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 <LibJS/AST.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/Array.h>
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#include <LibJS/Runtime/BigInt.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/LexicalEnvironment.h>
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#include <LibJS/Runtime/ScopeObject.h>
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#include <LibJS/Runtime/ScriptFunction.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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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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}
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void LoadImmediate::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = m_value;
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}
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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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}
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static Value abstract_inequals(GlobalObject& global_object, Value src1, Value src2)
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{
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return Value(!abstract_eq(global_object, src1, src2));
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}
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static Value abstract_equals(GlobalObject& global_object, Value src1, Value src2)
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{
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return Value(abstract_eq(global_object, src1, src2));
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}
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static Value typed_inequals(GlobalObject&, Value src1, Value src2)
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{
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return Value(!strict_eq(src1, src2));
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}
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static Value typed_equals(GlobalObject&, Value src1, Value src2)
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{
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return Value(strict_eq(src1, src2));
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}
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#define JS_DEFINE_COMMON_BINARY_OP(OpTitleCase, op_snake_case) \
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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() = op_snake_case(interpreter.global_object(), lhs, rhs); \
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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 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 Value typeof_(GlobalObject& global_object, Value value)
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{
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return 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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void OpTitleCase::execute_impl(Bytecode::Interpreter& interpreter) const \
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{ \
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interpreter.accumulator() = op_snake_case(interpreter.global_object(), interpreter.accumulator()); \
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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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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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}
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void NewArray::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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Vector<Value> elements;
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elements.ensure_capacity(m_element_count);
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for (size_t i = 0; i < m_element_count; i++)
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elements.append(interpreter.reg(m_elements[i]));
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interpreter.accumulator() = Array::create_from(interpreter.global_object(), elements);
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}
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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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}
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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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}
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void ConcatString::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.reg(m_lhs) = add(interpreter.global_object(), interpreter.reg(m_lhs), interpreter.accumulator());
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}
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void GetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = interpreter.vm().get_variable(interpreter.current_executable().get_string(m_identifier), interpreter.global_object());
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}
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void SetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.vm().set_variable(interpreter.current_executable().get_string(m_identifier), interpreter.accumulator(), interpreter.global_object());
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}
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void GetById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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if (auto* object = interpreter.accumulator().to_object(interpreter.global_object()))
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interpreter.accumulator() = object->get(interpreter.current_executable().get_string(m_property));
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}
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void PutById::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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if (auto* object = interpreter.reg(m_base).to_object(interpreter.global_object()))
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object->put(interpreter.current_executable().get_string(m_property), interpreter.accumulator());
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}
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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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}
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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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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());
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}
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void JumpNullish::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.is_nullish())
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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());
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}
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void Call::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto callee = interpreter.reg(m_callee);
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if (!callee.is_function()) {
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TODO();
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}
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auto& function = callee.as_function();
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auto this_value = interpreter.reg(m_this_value);
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Value return_value;
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if (m_argument_count == 0 && m_type == CallType::Call) {
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return_value = interpreter.vm().call(function, this_value);
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} else {
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MarkedValueList argument_values { interpreter.vm().heap() };
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for (size_t i = 0; i < m_argument_count; ++i) {
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argument_values.append(interpreter.reg(m_arguments[i]));
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}
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if (m_type == CallType::Call)
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return_value = interpreter.vm().call(function, this_value, move(argument_values));
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else
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return_value = interpreter.vm().construct(function, function, move(argument_values));
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}
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interpreter.accumulator() = return_value;
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}
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void NewFunction::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& vm = interpreter.vm();
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interpreter.accumulator() = ScriptFunction::create(interpreter.global_object(), m_function_node.name(), m_function_node.body(), m_function_node.parameters(), m_function_node.function_length(), vm.current_scope(), m_function_node.kind(), m_function_node.is_strict_mode(), m_function_node.is_arrow_function());
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}
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void Return::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.do_return(interpreter.accumulator().value_or(js_undefined()));
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}
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void Increment::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto old_value = interpreter.accumulator().to_numeric(interpreter.global_object());
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if (interpreter.vm().exception())
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return;
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if (old_value.is_number())
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interpreter.accumulator() = Value(old_value.as_double() + 1);
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else
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interpreter.accumulator() = js_bigint(interpreter.vm().heap(), old_value.as_bigint().big_integer().plus(Crypto::SignedBigInteger { 1 }));
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}
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void Decrement::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto old_value = interpreter.accumulator().to_numeric(interpreter.global_object());
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if (interpreter.vm().exception())
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return;
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if (old_value.is_number())
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interpreter.accumulator() = Value(old_value.as_double() - 1);
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else
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interpreter.accumulator() = js_bigint(interpreter.vm().heap(), old_value.as_bigint().big_integer().minus(Crypto::SignedBigInteger { 1 }));
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}
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void Throw::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.vm().throw_exception(interpreter.global_object(), interpreter.accumulator());
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}
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void EnterUnwindContext::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.enter_unwind_context(m_handler_target, m_finalizer_target);
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interpreter.jump(m_entry_point);
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}
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void EnterUnwindContext::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
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{
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if (&m_entry_point.block() == &from)
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m_entry_point = Label { to };
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if (m_handler_target.has_value() && &m_handler_target->block() == &from)
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m_handler_target = Label { to };
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if (m_finalizer_target.has_value() && &m_finalizer_target->block() == &from)
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m_finalizer_target = Label { to };
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}
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void LeaveUnwindContext::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.leave_unwind_context();
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}
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void ContinuePendingUnwind::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.continue_pending_unwind(m_resume_target);
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}
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void ContinuePendingUnwind::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
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{
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if (&m_resume_target.block() == &from)
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m_resume_target = Label { to };
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}
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void PushLexicalEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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HashMap<FlyString, Variable> resolved_variables;
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for (auto& it : m_variables)
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resolved_variables.set(interpreter.current_executable().get_string(it.key), it.value);
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auto* block_lexical_environment = interpreter.vm().heap().allocate<LexicalEnvironment>(interpreter.global_object(), move(resolved_variables), interpreter.vm().current_scope());
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interpreter.vm().call_frame().scope = block_lexical_environment;
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}
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void Yield::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto yielded_value = interpreter.accumulator().value_or(js_undefined());
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auto object = JS::Object::create(interpreter.global_object(), nullptr);
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object->put("result", yielded_value);
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if (m_continuation_label.has_value())
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object->put("continuation", Value(static_cast<double>(reinterpret_cast<u64>(&m_continuation_label->block()))));
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else
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object->put("continuation", Value(0));
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interpreter.do_return(object);
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}
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void Yield::replace_references_impl(BasicBlock const& from, BasicBlock const& to)
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{
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if (m_continuation_label.has_value() && &m_continuation_label->block() == &from)
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m_continuation_label = Label { to };
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}
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void GetByValue::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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if (auto* object = interpreter.reg(m_base).to_object(interpreter.global_object())) {
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auto property_key = interpreter.accumulator().to_property_key(interpreter.global_object());
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if (interpreter.vm().exception())
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return;
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interpreter.accumulator() = object->get(property_key);
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}
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}
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void PutByValue::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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if (auto* object = interpreter.reg(m_base).to_object(interpreter.global_object())) {
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auto property_key = interpreter.reg(m_property).to_property_key(interpreter.global_object());
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if (interpreter.vm().exception())
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return;
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object->put(property_key, interpreter.accumulator());
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}
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}
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void LoadArgument::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = interpreter.vm().argument(m_index);
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}
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String Load::to_string_impl(Bytecode::Executable const&) const
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{
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return String::formatted("Load {}", m_src);
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}
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String LoadImmediate::to_string_impl(Bytecode::Executable const&) const
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{
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return String::formatted("LoadImmediate {}", m_value);
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}
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String Store::to_string_impl(Bytecode::Executable const&) const
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{
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return String::formatted("Store {}", m_dst);
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}
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String NewBigInt::to_string_impl(Bytecode::Executable const&) const
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{
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return String::formatted("NewBigInt \"{}\"", m_bigint.to_base10());
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}
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String NewArray::to_string_impl(Bytecode::Executable const&) const
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{
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StringBuilder builder;
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builder.append("NewArray");
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if (m_element_count != 0) {
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builder.append(" [");
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for (size_t i = 0; i < m_element_count; ++i) {
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builder.appendff("{}", m_elements[i]);
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if (i != m_element_count - 1)
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builder.append(',');
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}
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builder.append(']');
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}
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return builder.to_string();
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}
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String NewString::to_string_impl(Bytecode::Executable const& executable) const
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{
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return String::formatted("NewString {} (\"{}\")", m_string, executable.string_table->get(m_string));
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}
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String NewObject::to_string_impl(Bytecode::Executable const&) const
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{
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return "NewObject";
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}
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String ConcatString::to_string_impl(Bytecode::Executable const&) const
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{
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return String::formatted("ConcatString {}", m_lhs);
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}
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String GetVariable::to_string_impl(Bytecode::Executable const& executable) const
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{
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return String::formatted("GetVariable {} ({})", m_identifier, executable.string_table->get(m_identifier));
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}
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String SetVariable::to_string_impl(Bytecode::Executable const& executable) const
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{
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return String::formatted("SetVariable {} ({})", m_identifier, executable.string_table->get(m_identifier));
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}
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String PutById::to_string_impl(Bytecode::Executable const& executable) const
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{
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return String::formatted("PutById base:{}, property:{} ({})", m_base, m_property, executable.string_table->get(m_property));
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}
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String GetById::to_string_impl(Bytecode::Executable const& executable) const
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{
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return String::formatted("GetById {} ({})", m_property, executable.string_table->get(m_property));
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}
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String Jump::to_string_impl(Bytecode::Executable const&) const
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{
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if (m_true_target.has_value())
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return String::formatted("Jump {}", *m_true_target);
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return String::formatted("Jump <empty>");
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}
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String JumpConditional::to_string_impl(Bytecode::Executable const&) const
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{
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auto true_string = m_true_target.has_value() ? String::formatted("{}", *m_true_target) : "<empty>";
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auto false_string = m_false_target.has_value() ? String::formatted("{}", *m_false_target) : "<empty>";
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return String::formatted("JumpConditional true:{} false:{}", true_string, false_string);
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}
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String JumpNullish::to_string_impl(Bytecode::Executable const&) const
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{
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auto true_string = m_true_target.has_value() ? String::formatted("{}", *m_true_target) : "<empty>";
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auto false_string = m_false_target.has_value() ? String::formatted("{}", *m_false_target) : "<empty>";
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return String::formatted("JumpNullish null:{} nonnull:{}", true_string, false_string);
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}
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String Call::to_string_impl(Bytecode::Executable const&) const
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{
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StringBuilder builder;
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builder.appendff("Call callee:{}, this:{}", m_callee, m_this_value);
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if (m_argument_count != 0) {
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builder.append(", arguments:[");
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for (size_t i = 0; i < m_argument_count; ++i) {
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builder.appendff("{}", m_arguments[i]);
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if (i != m_argument_count - 1)
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builder.append(',');
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}
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builder.append(']');
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}
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return builder.to_string();
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}
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String NewFunction::to_string_impl(Bytecode::Executable const&) const
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{
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return "NewFunction";
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}
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|
|
|
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 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 PushLexicalEnvironment::to_string_impl(const Bytecode::Executable& executable) const
|
|
{
|
|
StringBuilder builder;
|
|
builder.append("PushLexicalEnvironment");
|
|
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(const Bytecode::Executable&) const
|
|
{
|
|
return String::formatted("GetByValue base:{}", m_base);
|
|
}
|
|
|
|
String PutByValue::to_string_impl(const Bytecode::Executable&) const
|
|
{
|
|
return String::formatted("PutByValue base:{}, property:{}", m_base, m_property);
|
|
}
|
|
|
|
String LoadArgument::to_string_impl(const Bytecode::Executable&) const
|
|
{
|
|
return String::formatted("LoadArgument {}", m_index);
|
|
}
|
|
|
|
}
|