59eedd6de0
Added Increment and Decrement bytecode ops to support this. Postfix updates use a temporary register to preserve the original value. Note that this patch only implements Identifier updates. Member expression updates are a TODO.
386 lines
12 KiB
C++
386 lines
12 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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*
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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/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() 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();
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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(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(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(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(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() 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(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() 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(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(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(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = js_string(interpreter.vm(), m_string);
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}
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void NewObject::execute(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = Object::create_empty(interpreter.global_object());
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}
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void ConcatString::execute(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(Bytecode::Interpreter& interpreter) const
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{
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interpreter.accumulator() = interpreter.vm().get_variable(m_identifier, interpreter.global_object());
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}
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void SetVariable::execute(Bytecode::Interpreter& interpreter) const
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{
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interpreter.vm().set_variable(m_identifier, interpreter.accumulator(), interpreter.global_object());
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}
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void GetById::execute(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(m_property);
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}
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void PutById::execute(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(m_property, interpreter.accumulator());
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}
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void Jump::execute(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 JumpConditional::execute(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(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(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) {
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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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return_value = interpreter.vm().call(function, this_value, move(argument_values));
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}
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interpreter.accumulator() = return_value;
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}
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void EnterScope::execute(Bytecode::Interpreter& interpreter) const
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{
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auto& vm = interpreter.vm();
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auto& global_object = interpreter.global_object();
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for (auto& declaration : m_scope_node.functions())
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vm.current_scope()->put_to_scope(declaration.name(), { js_undefined(), DeclarationKind::Var });
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for (auto& declaration : m_scope_node.functions()) {
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auto* function = ScriptFunction::create(global_object, declaration.name(), declaration.body(), declaration.parameters(), declaration.function_length(), vm.current_scope(), declaration.is_strict_mode());
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vm.set_variable(declaration.name(), function, global_object);
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}
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// FIXME: Process variable declarations.
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// FIXME: Whatever else JS::Interpreter::enter_scope() does.
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}
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void Return::execute(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(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(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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String Load::to_string() 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() 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() 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() 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() 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() const
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{
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return String::formatted("NewString \"{}\"", m_string);
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}
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String NewObject::to_string() const
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{
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return "NewObject";
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}
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String ConcatString::to_string() 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() const
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{
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return String::formatted("GetVariable {}", m_identifier);
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}
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String SetVariable::to_string() const
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{
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return String::formatted("SetVariable {}", m_identifier);
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}
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String PutById::to_string() const
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{
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return String::formatted("PutById base:{}, property:{}", m_base, m_property);
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}
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String GetById::to_string() const
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{
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return String::formatted("GetById {}", m_property);
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}
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String Jump::to_string() 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() 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() 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() 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 EnterScope::to_string() const
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{
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return "EnterScope";
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}
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String Return::to_string() const
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{
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return "Return";
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}
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String Increment::to_string() const
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{
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return "Increment";
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}
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String Decrement::to_string() const
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{
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return "Decrement";
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}
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}
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