/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/HashTable.h>
#include <AK/TemporaryChange.h>
#include <LibJS/AST.h>
#include <LibJS/Bytecode/BasicBlock.h>
#include <LibJS/Bytecode/CommonImplementations.h>
#include <LibJS/Bytecode/Generator.h>
#include <LibJS/Bytecode/Instruction.h>
#include <LibJS/Bytecode/Interpreter.h>
#include <LibJS/Bytecode/Op.h>
#include <LibJS/JIT/Compiler.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/BigInt.h>
#include <LibJS/Runtime/DeclarativeEnvironment.h>
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/Environment.h>
#include <LibJS/Runtime/FunctionEnvironment.h>
#include <LibJS/Runtime/GlobalEnvironment.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Iterator.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/ObjectEnvironment.h>
#include <LibJS/Runtime/Realm.h>
#include <LibJS/Runtime/Reference.h>
#include <LibJS/Runtime/RegExpObject.h>
#include <LibJS/Runtime/Value.h>
#include <LibJS/Runtime/ValueInlines.h>
#include <LibJS/SourceTextModule.h>
namespace JS::Bytecode {
bool g_dump_bytecode = false;
Interpreter::Interpreter(VM& vm)
: m_vm(vm)
{
}
Interpreter::~Interpreter()
{
}
void Interpreter::visit_edges(Cell::Visitor& visitor)
{
for (auto& frame : m_call_frames) {
frame.visit([&](auto& value) { value->visit_edges(visitor); });
}
}
// 16.1.6 ScriptEvaluation ( scriptRecord ), https://tc39.es/ecma262/#sec-runtime-semantics-scriptevaluation
ThrowCompletionOr<Value> Interpreter::run(Script& script_record, JS::GCPtr<Environment> lexical_environment_override)
{
auto& vm = this->vm();
// 1. Let globalEnv be scriptRecord.[[Realm]].[[GlobalEnv]].
auto& global_environment = script_record.realm().global_environment();
// 2. Let scriptContext be a new ECMAScript code execution context.
ExecutionContext script_context(vm.heap());
// 3. Set the Function of scriptContext to null.
// NOTE: This was done during execution context construction.
// 4. Set the Realm of scriptContext to scriptRecord.[[Realm]].
script_context.realm = &script_record.realm();
// 5. Set the ScriptOrModule of scriptContext to scriptRecord.
script_context.script_or_module = NonnullGCPtr<Script>(script_record);
// 6. Set the VariableEnvironment of scriptContext to globalEnv.
script_context.variable_environment = &global_environment;
// 7. Set the LexicalEnvironment of scriptContext to globalEnv.
script_context.lexical_environment = &global_environment;
// Non-standard: Override the lexical environment if requested.
if (lexical_environment_override)
script_context.lexical_environment = lexical_environment_override;
// 8. Set the PrivateEnvironment of scriptContext to null.
// NOTE: This isn't in the spec, but we require it.
script_context.is_strict_mode = script_record.parse_node().is_strict_mode();
// FIXME: 9. Suspend the currently running execution context.
// 10. Push scriptContext onto the execution context stack; scriptContext is now the running execution context.
TRY(vm.push_execution_context(script_context, {}));
// 11. Let script be scriptRecord.[[ECMAScriptCode]].
auto& script = script_record.parse_node();
// 12. Let result be Completion(GlobalDeclarationInstantiation(script, globalEnv)).
auto instantiation_result = script.global_declaration_instantiation(vm, global_environment);
Completion result = instantiation_result.is_throw_completion() ? instantiation_result.throw_completion() : normal_completion({});
// 13. If result.[[Type]] is normal, then
if (result.type() == Completion::Type::Normal) {
auto executable_result = JS::Bytecode::Generator::generate(script);
if (executable_result.is_error()) {
if (auto error_string = executable_result.error().to_string(); error_string.is_error())
result = vm.template throw_completion<JS::InternalError>(vm.error_message(JS::VM::ErrorMessage::OutOfMemory));
else if (error_string = String::formatted("TODO({})", error_string.value()); error_string.is_error())
result = vm.template throw_completion<JS::InternalError>(vm.error_message(JS::VM::ErrorMessage::OutOfMemory));
else
result = JS::throw_completion(JS::InternalError::create(realm(), error_string.release_value()));
} else {
auto executable = executable_result.release_value();
if (g_dump_bytecode)
executable->dump();
// a. Set result to the result of evaluating script.
auto result_or_error = run_and_return_frame(*executable, nullptr);
if (result_or_error.value.is_error())
result = result_or_error.value.release_error();
else
result = result_or_error.frame->registers[0];
}
}
// 14. If result.[[Type]] is normal and result.[[Value]] is empty, then
if (result.type() == Completion::Type::Normal && !result.value().has_value()) {
// a. Set result to NormalCompletion(undefined).
result = normal_completion(js_undefined());
}
// FIXME: 15. Suspend scriptContext and remove it from the execution context stack.
vm.pop_execution_context();
// 16. Assert: The execution context stack is not empty.
VERIFY(!vm.execution_context_stack().is_empty());
// FIXME: 17. Resume the context that is now on the top of the execution context stack as the running execution context.
// At this point we may have already run any queued promise jobs via on_call_stack_emptied,
// in which case this is a no-op.
// FIXME: These three should be moved out of Interpreter::run and give the host an option to run these, as it's up to the host when these get run.
// https://tc39.es/ecma262/#sec-jobs for jobs and https://tc39.es/ecma262/#_ref_3508 for ClearKeptObjects
// finish_execution_generation is particularly an issue for LibWeb, as the HTML spec wants to run it specifically after performing a microtask checkpoint.
// The promise and registry cleanup queues don't cause LibWeb an issue, as LibWeb overrides the hooks that push onto these queues.
vm.run_queued_promise_jobs();
vm.run_queued_finalization_registry_cleanup_jobs();
vm.finish_execution_generation();
// 18. Return ? result.
if (result.is_abrupt()) {
VERIFY(result.type() == Completion::Type::Throw);
return result.release_error();
}
VERIFY(result.value().has_value());
return *result.value();
}
ThrowCompletionOr<Value> Interpreter::run(SourceTextModule& module)
{
// FIXME: This is not a entry point as defined in the spec, but is convenient.
// To avoid work we use link_and_eval_module however that can already be
// dangerous if the vm loaded other modules.
auto& vm = this->vm();
TRY(vm.link_and_eval_module(Badge<Bytecode::Interpreter> {}, module));
vm.run_queued_promise_jobs();
vm.run_queued_finalization_registry_cleanup_jobs();
return js_undefined();
}
void Interpreter::run_bytecode()
{
auto* locals = vm().running_execution_context().local_variables.data();
auto* registers = this->registers().data();
auto& accumulator = this->accumulator();
for (;;) {
start:
auto pc = InstructionStreamIterator { m_current_block->instruction_stream(), m_current_executable };
TemporaryChange temp_change { m_pc, Optional<InstructionStreamIterator&>(pc) };
bool will_return = false;
bool will_yield = false;
ThrowCompletionOr<void> result;
while (!pc.at_end()) {
auto& instruction = *pc;
switch (instruction.type()) {
case Instruction::Type::GetLocal: {
auto& local = locals[static_cast<Op::GetLocal const&>(instruction).index()];
if (local.is_empty()) {
auto const& variable_name = vm().running_execution_context().function->local_variables_names()[static_cast<Op::GetLocal const&>(instruction).index()];
result = vm().throw_completion<ReferenceError>(ErrorType::BindingNotInitialized, variable_name);
break;
}
accumulator = local;
break;
}
case Instruction::Type::SetLocal:
locals[static_cast<Op::SetLocal const&>(instruction).index()] = accumulator;
break;
case Instruction::Type::Load:
accumulator = registers[static_cast<Op::Load const&>(instruction).src().index()];
break;
case Instruction::Type::Store:
registers[static_cast<Op::Store const&>(instruction).dst().index()] = accumulator;
break;
case Instruction::Type::LoadImmediate:
accumulator = static_cast<Op::LoadImmediate const&>(instruction).value();
break;
case Instruction::Type::Jump:
m_current_block = &static_cast<Op::Jump const&>(instruction).true_target()->block();
goto start;
case Instruction::Type::JumpConditional:
if (accumulator.to_boolean())
m_current_block = &static_cast<Op::Jump const&>(instruction).true_target()->block();
else
m_current_block = &static_cast<Op::Jump const&>(instruction).false_target()->block();
goto start;
case Instruction::Type::JumpNullish:
if (accumulator.is_nullish())
m_current_block = &static_cast<Op::Jump const&>(instruction).true_target()->block();
else
m_current_block = &static_cast<Op::Jump const&>(instruction).false_target()->block();
goto start;
case Instruction::Type::JumpUndefined:
if (accumulator.is_undefined())
m_current_block = &static_cast<Op::Jump const&>(instruction).true_target()->block();
else
m_current_block = &static_cast<Op::Jump const&>(instruction).false_target()->block();
goto start;
case Instruction::Type::EnterUnwindContext:
enter_unwind_context(
static_cast<Op::EnterUnwindContext const&>(instruction).handler_target(),
static_cast<Op::EnterUnwindContext const&>(instruction).finalizer_target());
m_current_block = &static_cast<Op::EnterUnwindContext const&>(instruction).entry_point().block();
goto start;
case Instruction::Type::ContinuePendingUnwind:
if (auto exception = reg(Register::exception()); !exception.is_empty()) {
result = throw_completion(exception);
break;
}
if (!saved_return_value().is_empty()) {
do_return(saved_return_value());
break;
}
if (m_scheduled_jump) {
// FIXME: If we `break` or `continue` in the finally, we need to clear
// this field
m_current_block = exchange(m_scheduled_jump, nullptr);
} else {
m_current_block = &static_cast<Op::ContinuePendingUnwind const&>(instruction).resume_target().block();
}
goto start;
case Instruction::Type::ScheduleJump:
m_scheduled_jump = &static_cast<Op::ScheduleJump const&>(instruction).target().block();
m_current_block = unwind_contexts().last().finalizer;
goto start;
default:
result = instruction.execute(*this);
break;
}
if (result.is_error()) [[unlikely]] {
reg(Register::exception()) = *result.throw_completion().value();
if (unwind_contexts().is_empty())
return;
auto& unwind_context = unwind_contexts().last();
if (unwind_context.executable != m_current_executable)
return;
if (unwind_context.handler && !unwind_context.handler_called) {
vm().running_execution_context().lexical_environment = unwind_context.lexical_environment;
m_current_block = unwind_context.handler;
unwind_context.handler_called = true;
accumulator = reg(Register::exception());
reg(Register::exception()) = {};
goto start;
}
if (unwind_context.finalizer) {
m_current_block = unwind_context.finalizer;
// If an exception was thrown inside the corresponding `catch` block, we need to rethrow it
// from the `finally` block. But if the exception is from the `try` block, and has already been
// handled by `catch`, we swallow it.
if (!unwind_context.handler_called)
reg(Register::exception()) = {};
goto start;
}
// An unwind context with no handler or finalizer? We have nowhere to jump, and continuing on will make us crash on the next `Call` to a non-native function if there's an exception! So let's crash here instead.
// If you run into this, you probably forgot to remove the current unwind_context somewhere.
VERIFY_NOT_REACHED();
}
if (!reg(Register::return_value()).is_empty()) {
will_return = true;
// Note: A `yield` statement will not go through a finally statement,
// hence we need to set a flag to not do so,
// but we generate a Yield Operation in the case of returns in
// generators as well, so we need to check if it will actually
// continue or is a `return` in disguise
will_yield = (instruction.type() == Instruction::Type::Yield && static_cast<Op::Yield const&>(instruction).continuation().has_value()) || instruction.type() == Instruction::Type::Await;
break;
}
++pc;
}
if (!unwind_contexts().is_empty() && !will_yield) {
auto& unwind_context = unwind_contexts().last();
if (unwind_context.executable == m_current_executable && unwind_context.finalizer) {
reg(Register::saved_return_value()) = reg(Register::return_value());
reg(Register::return_value()) = {};
m_current_block = unwind_context.finalizer;
// the unwind_context will be pop'ed when entering the finally block
continue;
}
}
if (pc.at_end())
break;
if (will_return)
break;
}
}
Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executable, BasicBlock const* entry_point, CallFrame* in_frame)
{
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter will run unit {:p}", &executable);
TemporaryChange restore_executable { m_current_executable, &executable };
TemporaryChange restore_saved_jump { m_scheduled_jump, static_cast<BasicBlock const*>(nullptr) };
VERIFY(!vm().execution_context_stack().is_empty());
TemporaryChange restore_current_block { m_current_block, entry_point ?: executable.basic_blocks.first() };
if (in_frame)
push_call_frame(in_frame, executable.number_of_registers);
else
push_call_frame(make<CallFrame>(), executable.number_of_registers);
if (auto native_executable = executable.get_or_create_native_executable()) {
native_executable->run(vm());
#if 0
for (size_t i = 0; i < vm().running_execution_context().local_variables.size(); ++i) {
dbgln("%{}: {}", i, vm().running_execution_context().local_variables[i]);
}
#endif
} else {
run_bytecode();
}
dbgln_if(JS_BYTECODE_DEBUG, "Bytecode::Interpreter did run unit {:p}", &executable);
if constexpr (JS_BYTECODE_DEBUG) {
for (size_t i = 0; i < registers().size(); ++i) {
String value_string;
if (registers()[i].is_empty())
value_string = "(empty)"_string;
else
value_string = registers()[i].to_string_without_side_effects();
dbgln("[{:3}] {}", i, value_string);
}
}
auto return_value = js_undefined();
if (!reg(Register::return_value()).is_empty())
return_value = reg(Register::return_value());
else if (!reg(Register::saved_return_value()).is_empty())
return_value = reg(Register::saved_return_value());
auto exception = reg(Register::exception());
auto frame = pop_call_frame();
// NOTE: The return value from a called function is put into $0 in the caller context.
if (!m_call_frames.is_empty())
call_frame().registers[0] = return_value;
// At this point we may have already run any queued promise jobs via on_call_stack_emptied,
// in which case this is a no-op.
vm().run_queued_promise_jobs();
vm().finish_execution_generation();
if (!exception.is_empty()) {
if (auto* call_frame = frame.get_pointer<NonnullOwnPtr<CallFrame>>())
return { throw_completion(exception), move(*call_frame) };
return { throw_completion(exception), nullptr };
}
if (auto* call_frame = frame.get_pointer<NonnullOwnPtr<CallFrame>>())
return { return_value, move(*call_frame) };
return { return_value, nullptr };
}
void Interpreter::enter_unwind_context(Optional<Label> handler_target, Optional<Label> finalizer_target)
{
unwind_contexts().empend(
m_current_executable,
handler_target.has_value() ? &handler_target->block() : nullptr,
finalizer_target.has_value() ? &finalizer_target->block() : nullptr,
vm().running_execution_context().lexical_environment);
}
void Interpreter::leave_unwind_context()
{
unwind_contexts().take_last();
}
ThrowCompletionOr<NonnullRefPtr<Bytecode::Executable>> compile(VM& vm, ASTNode const& node, FunctionKind kind, DeprecatedFlyString const& name)
{
auto executable_result = Bytecode::Generator::generate(node, kind);
if (executable_result.is_error())
return vm.throw_completion<InternalError>(ErrorType::NotImplemented, TRY_OR_THROW_OOM(vm, executable_result.error().to_string()));
auto bytecode_executable = executable_result.release_value();
bytecode_executable->name = name;
if (Bytecode::g_dump_bytecode)
bytecode_executable->dump();
return bytecode_executable;
}
Realm& Interpreter::realm()
{
return *m_vm.current_realm();
}
void Interpreter::push_call_frame(Variant<NonnullOwnPtr<CallFrame>, CallFrame*> frame, size_t register_count)
{
m_call_frames.append(move(frame));
this->call_frame().registers.resize(register_count);
m_current_call_frame = this->call_frame().registers;
reg(Register::return_value()) = {};
}
Variant<NonnullOwnPtr<CallFrame>, CallFrame*> Interpreter::pop_call_frame()
{
auto frame = m_call_frames.take_last();
m_current_call_frame = m_call_frames.is_empty() ? Span<Value> {} : this->call_frame().registers;
return frame;
}
}
namespace JS::Bytecode {
DeprecatedString Instruction::to_deprecated_string(Bytecode::Executable const& executable) const
{
#define __BYTECODE_OP(op) \
case Instruction::Type::op: \
return static_cast<Bytecode::Op::op const&>(*this).to_deprecated_string_impl(executable);
switch (type()) {
ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
default:
VERIFY_NOT_REACHED();
}
#undef __BYTECODE_OP
}
}
namespace JS::Bytecode::Op {
ThrowCompletionOr<void> Load::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> LoadImmediate::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> Store::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
static ThrowCompletionOr<Value> abstract_inequals(VM& vm, Value src1, Value src2)
{
return Value(!TRY(is_loosely_equal(vm, src1, src2)));
}
static ThrowCompletionOr<Value> abstract_equals(VM& vm, Value src1, Value src2)
{
return Value(TRY(is_loosely_equal(vm, src1, src2)));
}
static ThrowCompletionOr<Value> typed_inequals(VM&, Value src1, Value src2)
{
return Value(!is_strictly_equal(src1, src2));
}
static ThrowCompletionOr<Value> typed_equals(VM&, Value src1, Value src2)
{
return Value(is_strictly_equal(src1, src2));
}
#define JS_DEFINE_COMMON_BINARY_OP(OpTitleCase, op_snake_case) \
ThrowCompletionOr<void> OpTitleCase::execute_impl(Bytecode::Interpreter& interpreter) const \
{ \
auto& vm = interpreter.vm(); \
auto lhs = interpreter.reg(m_lhs_reg); \
auto rhs = interpreter.accumulator(); \
interpreter.accumulator() = TRY(op_snake_case(vm, lhs, rhs)); \
return {}; \
} \
DeprecatedString OpTitleCase::to_deprecated_string_impl(Bytecode::Executable const&) const \
{ \
return DeprecatedString::formatted(#OpTitleCase " {}", m_lhs_reg); \
}
JS_ENUMERATE_COMMON_BINARY_OPS(JS_DEFINE_COMMON_BINARY_OP)
static ThrowCompletionOr<Value> not_(VM&, Value value)
{
return Value(!value.to_boolean());
}
static ThrowCompletionOr<Value> typeof_(VM& vm, Value value)
{
return PrimitiveString::create(vm, value.typeof());
}
#define JS_DEFINE_COMMON_UNARY_OP(OpTitleCase, op_snake_case) \
ThrowCompletionOr<void> OpTitleCase::execute_impl(Bytecode::Interpreter& interpreter) const \
{ \
auto& vm = interpreter.vm(); \
interpreter.accumulator() = TRY(op_snake_case(vm, interpreter.accumulator())); \
return {}; \
} \
DeprecatedString OpTitleCase::to_deprecated_string_impl(Bytecode::Executable const&) const \
{ \
return #OpTitleCase; \
}
JS_ENUMERATE_COMMON_UNARY_OPS(JS_DEFINE_COMMON_UNARY_OP)
ThrowCompletionOr<void> NewBigInt::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
interpreter.accumulator() = BigInt::create(vm, m_bigint);
return {};
}
ThrowCompletionOr<void> NewArray::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto array = MUST(Array::create(interpreter.realm(), 0));
for (size_t i = 0; i < m_element_count; i++) {
auto& value = interpreter.reg(Register(m_elements[0].index() + i));
array->indexed_properties().put(i, value, default_attributes);
}
interpreter.accumulator() = array;
return {};
}
ThrowCompletionOr<void> Append::execute_impl(Bytecode::Interpreter& interpreter) const
{
// Note: This OpCode is used to construct array literals and argument arrays for calls,
// containing at least one spread element,
// Iterating over such a spread element to unpack it has to be visible by
// the user courtesy of
// (1) https://tc39.es/ecma262/#sec-runtime-semantics-arrayaccumulation
// SpreadElement : ... AssignmentExpression
// 1. Let spreadRef be ? Evaluation of AssignmentExpression.
// 2. Let spreadObj be ? GetValue(spreadRef).
// 3. Let iteratorRecord be ? GetIterator(spreadObj).
// 4. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return nextIndex.
// c. Let nextValue be ? IteratorValue(next).
// d. Perform ! CreateDataPropertyOrThrow(array, ! ToString(𝔽(nextIndex)), nextValue).
// e. Set nextIndex to nextIndex + 1.
// (2) https://tc39.es/ecma262/#sec-runtime-semantics-argumentlistevaluation
// ArgumentList : ... AssignmentExpression
// 1. Let list be a new empty List.
// 2. Let spreadRef be ? Evaluation of AssignmentExpression.
// 3. Let spreadObj be ? GetValue(spreadRef).
// 4. Let iteratorRecord be ? GetIterator(spreadObj).
// 5. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return list.
// c. Let nextArg be ? IteratorValue(next).
// d. Append nextArg to list.
// ArgumentList : ArgumentList , ... AssignmentExpression
// 1. Let precedingArgs be ? ArgumentListEvaluation of ArgumentList.
// 2. Let spreadRef be ? Evaluation of AssignmentExpression.
// 3. Let iteratorRecord be ? GetIterator(? GetValue(spreadRef)).
// 4. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return precedingArgs.
// c. Let nextArg be ? IteratorValue(next).
// d. Append nextArg to precedingArgs.
auto& vm = interpreter.vm();
// Note: We know from codegen, that lhs is a plain array with only indexed properties
auto& lhs = interpreter.reg(m_lhs).as_array();
auto lhs_size = lhs.indexed_properties().array_like_size();
auto rhs = interpreter.accumulator();
if (m_is_spread) {
// ...rhs
size_t i = lhs_size;
TRY(get_iterator_values(vm, rhs, [&i, &lhs](Value iterator_value) -> Optional<Completion> {
lhs.indexed_properties().put(i, iterator_value, default_attributes);
++i;
return {};
}));
} else {
lhs.indexed_properties().put(lhs_size, rhs, default_attributes);
}
return {};
}
ThrowCompletionOr<void> ImportCall::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto specifier = interpreter.reg(m_specifier);
auto options_value = interpreter.reg(m_options);
interpreter.accumulator() = TRY(perform_import_call(vm, specifier, options_value));
return {};
}
// 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.
// Make sure to put this into the accumulator before the iterator object disappears from the stack to prevent the members from being GC'd.
static Object* iterator_to_object(VM& vm, IteratorRecord iterator)
{
auto& realm = *vm.current_realm();
auto object = Object::create(realm, nullptr);
object->define_direct_property(vm.names.iterator, iterator.iterator, 0);
object->define_direct_property(vm.names.next, iterator.next_method, 0);
object->define_direct_property(vm.names.done, Value(iterator.done), 0);
return object;
}
static IteratorRecord object_to_iterator(VM& vm, Object& object)
{
return IteratorRecord {
.iterator = &MUST(object.get(vm.names.iterator)).as_object(),
.next_method = MUST(object.get(vm.names.next)),
.done = MUST(object.get(vm.names.done)).as_bool()
};
}
ThrowCompletionOr<void> IteratorToArray::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_object = TRY(interpreter.accumulator().to_object(vm));
auto iterator = object_to_iterator(vm, iterator_object);
auto array = MUST(Array::create(interpreter.realm(), 0));
size_t index = 0;
while (true) {
auto iterator_result = TRY(iterator_next(vm, iterator));
auto complete = TRY(iterator_complete(vm, iterator_result));
if (complete) {
interpreter.accumulator() = array;
return {};
}
auto value = TRY(iterator_value(vm, iterator_result));
MUST(array->create_data_property_or_throw(index, value));
index++;
}
return {};
}
ThrowCompletionOr<void> NewString::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = PrimitiveString::create(interpreter.vm(), interpreter.current_executable().get_string(m_string));
return {};
}
ThrowCompletionOr<void> NewObject::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
interpreter.accumulator() = Object::create(realm, realm.intrinsics().object_prototype());
return {};
}
// 13.2.7.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-regular-expression-literals-runtime-semantics-evaluation
ThrowCompletionOr<void> NewRegExp::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
// 1. Let pattern be CodePointsToString(BodyText of RegularExpressionLiteral).
auto pattern = interpreter.current_executable().get_string(m_source_index);
// 2. Let flags be CodePointsToString(FlagText of RegularExpressionLiteral).
auto flags = interpreter.current_executable().get_string(m_flags_index);
// 3. Return ! RegExpCreate(pattern, flags).
auto& parsed_regex = interpreter.current_executable().regex_table->get(m_regex_index);
Regex<ECMA262> regex(parsed_regex.regex, parsed_regex.pattern, parsed_regex.flags);
// NOTE: We bypass RegExpCreate and subsequently RegExpAlloc as an optimization to use the already parsed values.
auto regexp_object = RegExpObject::create(realm, move(regex), move(pattern), move(flags));
// RegExpAlloc has these two steps from the 'Legacy RegExp features' proposal.
regexp_object->set_realm(*vm.current_realm());
// We don't need to check 'If SameValue(newTarget, thisRealm.[[Intrinsics]].[[%RegExp%]]) is true'
// here as we know RegExpCreate calls RegExpAlloc with %RegExp% for newTarget.
regexp_object->set_legacy_features_enabled(true);
interpreter.accumulator() = regexp_object;
return {};
}
#define JS_DEFINE_NEW_BUILTIN_ERROR_OP(ErrorName) \
ThrowCompletionOr<void> New##ErrorName::execute_impl(Bytecode::Interpreter& interpreter) const \
{ \
auto& vm = interpreter.vm(); \
auto& realm = *vm.current_realm(); \
interpreter.accumulator() = ErrorName::create(realm, interpreter.current_executable().get_string(m_error_string)); \
return {}; \
} \
DeprecatedString New##ErrorName::to_deprecated_string_impl(Bytecode::Executable const& executable) const \
{ \
return DeprecatedString::formatted("New" #ErrorName " {} (\"{}\")", m_error_string, executable.string_table->get(m_error_string)); \
}
JS_ENUMERATE_NEW_BUILTIN_ERROR_OPS(JS_DEFINE_NEW_BUILTIN_ERROR_OP)
ThrowCompletionOr<void> CopyObjectExcludingProperties::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
auto from_object = interpreter.reg(m_from_object);
auto to_object = Object::create(realm, realm.intrinsics().object_prototype());
HashTable<PropertyKey> excluded_names;
for (size_t i = 0; i < m_excluded_names_count; ++i) {
excluded_names.set(TRY(interpreter.reg(m_excluded_names[i]).to_property_key(vm)));
}
TRY(to_object->copy_data_properties(vm, from_object, excluded_names));
interpreter.accumulator() = to_object;
return {};
}
ThrowCompletionOr<void> ConcatString::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto string = TRY(interpreter.accumulator().to_primitive_string(vm));
interpreter.reg(m_lhs) = PrimitiveString::create(vm, interpreter.reg(m_lhs).as_string(), string);
return {};
}
ThrowCompletionOr<void> GetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& cached_environment_coordinate = interpreter.current_executable().environment_variable_caches[m_cache_index];
if (cached_environment_coordinate.has_value()) {
auto environment = vm.running_execution_context().lexical_environment;
for (size_t i = 0; i < cached_environment_coordinate->hops; ++i)
environment = environment->outer_environment();
VERIFY(environment);
VERIFY(environment->is_declarative_environment());
if (!environment->is_permanently_screwed_by_eval()) {
interpreter.accumulator() = TRY(verify_cast<DeclarativeEnvironment>(*environment).get_binding_value_direct(vm, cached_environment_coordinate.value().index, vm.in_strict_mode()));
return {};
}
cached_environment_coordinate = {};
}
auto const& string = interpreter.current_executable().get_identifier(m_identifier);
auto reference = TRY(vm.resolve_binding(string));
if (reference.environment_coordinate().has_value())
cached_environment_coordinate = reference.environment_coordinate();
interpreter.accumulator() = TRY(reference.get_value(vm));
return {};
}
ThrowCompletionOr<void> GetCalleeAndThisFromEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& cached_environment_coordinate = interpreter.current_executable().environment_variable_caches[m_cache_index];
if (cached_environment_coordinate.has_value()) {
auto environment = vm.running_execution_context().lexical_environment;
for (size_t i = 0; i < cached_environment_coordinate->hops; ++i)
environment = environment->outer_environment();
VERIFY(environment);
VERIFY(environment->is_declarative_environment());
if (!environment->is_permanently_screwed_by_eval()) {
interpreter.reg(m_callee_reg) = TRY(verify_cast<DeclarativeEnvironment>(*environment).get_binding_value_direct(vm, cached_environment_coordinate.value().index, vm.in_strict_mode()));
Value this_value = js_undefined();
if (auto base_object = environment->with_base_object())
this_value = base_object;
interpreter.reg(m_this_reg) = this_value;
return {};
}
cached_environment_coordinate = {};
}
auto const& string = interpreter.current_executable().get_identifier(m_identifier);
auto reference = TRY(vm.resolve_binding(string));
if (reference.environment_coordinate().has_value())
cached_environment_coordinate = reference.environment_coordinate();
interpreter.reg(m_callee_reg) = TRY(reference.get_value(vm));
Value this_value = js_undefined();
if (reference.is_property_reference()) {
this_value = reference.get_this_value();
} else {
if (reference.is_environment_reference()) {
if (auto base_object = reference.base_environment().with_base_object(); base_object != nullptr)
this_value = base_object;
}
}
interpreter.reg(m_this_reg) = this_value;
return {};
}
ThrowCompletionOr<void> GetGlobal::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = TRY(get_global(interpreter, m_identifier, m_cache_index));
return {};
}
ThrowCompletionOr<void> GetLocal::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> DeleteVariable::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const& string = interpreter.current_executable().get_identifier(m_identifier);
auto reference = TRY(vm.resolve_binding(string));
interpreter.accumulator() = Value(TRY(reference.delete_(vm)));
return {};
}
ThrowCompletionOr<void> CreateLexicalEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto make_and_swap_envs = [&](auto& old_environment) {
GCPtr<Environment> environment = new_declarative_environment(*old_environment).ptr();
swap(old_environment, environment);
return environment;
};
interpreter.saved_lexical_environment_stack().append(make_and_swap_envs(interpreter.vm().running_execution_context().lexical_environment));
return {};
}
ThrowCompletionOr<void> EnterObjectEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto& old_environment = vm.running_execution_context().lexical_environment;
interpreter.saved_lexical_environment_stack().append(old_environment);
auto object = TRY(interpreter.accumulator().to_object(vm));
vm.running_execution_context().lexical_environment = new_object_environment(object, true, old_environment);
return {};
}
ThrowCompletionOr<void> CreateVariable::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const& name = interpreter.current_executable().get_identifier(m_identifier);
if (m_mode == EnvironmentMode::Lexical) {
VERIFY(!m_is_global);
// Note: This is papering over an issue where "FunctionDeclarationInstantiation" creates these bindings for us.
// Instead of crashing in there, we'll just raise an exception here.
if (TRY(vm.lexical_environment()->has_binding(name)))
return vm.throw_completion<InternalError>(TRY_OR_THROW_OOM(vm, String::formatted("Lexical environment already has binding '{}'", name)));
if (m_is_immutable)
return vm.lexical_environment()->create_immutable_binding(vm, name, m_is_strict);
else
return vm.lexical_environment()->create_mutable_binding(vm, name, m_is_strict);
} else {
if (!m_is_global) {
if (m_is_immutable)
return vm.variable_environment()->create_immutable_binding(vm, name, m_is_strict);
else
return vm.variable_environment()->create_mutable_binding(vm, name, m_is_strict);
} else {
// NOTE: CreateVariable with m_is_global set to true is expected to only be used in GlobalDeclarationInstantiation currently, which only uses "false" for "can_be_deleted".
// The only area that sets "can_be_deleted" to true is EvalDeclarationInstantiation, which is currently fully implemented in C++ and not in Bytecode.
return verify_cast<GlobalEnvironment>(vm.variable_environment())->create_global_var_binding(name, false);
}
}
return {};
}
ThrowCompletionOr<void> SetVariable::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const& name = interpreter.current_executable().get_identifier(m_identifier);
TRY(set_variable(vm, name, interpreter.accumulator(), m_mode, m_initialization_mode));
return {};
}
ThrowCompletionOr<void> SetLocal::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> GetById::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto base_value = interpreter.accumulator();
interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, base_value, m_cache_index));
return {};
}
ThrowCompletionOr<void> GetByIdWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto base_value = interpreter.accumulator();
auto this_value = interpreter.reg(m_this_value);
interpreter.accumulator() = TRY(get_by_id(interpreter, m_property, base_value, this_value, m_cache_index));
return {};
}
ThrowCompletionOr<void> GetPrivateById::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const& name = interpreter.current_executable().get_identifier(m_property);
auto base_value = interpreter.accumulator();
auto private_reference = make_private_reference(vm, base_value, name);
interpreter.accumulator() = TRY(private_reference.get_value(vm));
return {};
}
ThrowCompletionOr<void> HasPrivateId::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
if (!interpreter.accumulator().is_object())
return vm.throw_completion<TypeError>(ErrorType::InOperatorWithObject);
auto private_environment = vm.running_execution_context().private_environment;
VERIFY(private_environment);
auto private_name = private_environment->resolve_private_identifier(interpreter.current_executable().get_identifier(m_property));
interpreter.accumulator() = Value(interpreter.accumulator().as_object().private_element_find(private_name) != nullptr);
return {};
}
ThrowCompletionOr<void> PutById::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the value from the accumulator before side effects have a chance to overwrite it.
auto value = interpreter.accumulator();
auto base = interpreter.reg(m_base);
PropertyKey name = interpreter.current_executable().get_identifier(m_property);
TRY(put_by_property_key(vm, base, base, value, name, m_kind));
interpreter.accumulator() = value;
return {};
}
ThrowCompletionOr<void> PutByIdWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the value from the accumulator before side effects have a chance to overwrite it.
auto value = interpreter.accumulator();
auto base = interpreter.reg(m_base);
PropertyKey name = interpreter.current_executable().get_identifier(m_property);
TRY(put_by_property_key(vm, base, interpreter.reg(m_this_value), value, name, m_kind));
interpreter.accumulator() = value;
return {};
}
ThrowCompletionOr<void> PutPrivateById::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the value from the accumulator before side effects have a chance to overwrite it.
auto value = interpreter.accumulator();
auto object = TRY(interpreter.reg(m_base).to_object(vm));
auto name = interpreter.current_executable().get_identifier(m_property);
auto private_reference = make_private_reference(vm, object, name);
TRY(private_reference.put_value(vm, value));
interpreter.accumulator() = value;
return {};
}
ThrowCompletionOr<void> DeleteById::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto base_value = interpreter.accumulator();
auto const& identifier = interpreter.current_executable().get_identifier(m_property);
bool strict = vm.in_strict_mode();
auto reference = Reference { base_value, identifier, {}, strict };
interpreter.accumulator() = Value(TRY(reference.delete_(vm)));
return {};
}
ThrowCompletionOr<void> DeleteByIdWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto base_value = interpreter.accumulator();
auto const& identifier = interpreter.current_executable().get_identifier(m_property);
bool strict = vm.in_strict_mode();
auto reference = Reference { base_value, identifier, interpreter.reg(m_this_value), strict };
interpreter.accumulator() = Value(TRY(reference.delete_(vm)));
return {};
}
ThrowCompletionOr<void> Jump::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> ResolveThisBinding::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& cached_this_value = interpreter.reg(Register::this_value());
if (cached_this_value.is_empty()) {
// OPTIMIZATION: Because the value of 'this' cannot be reassigned during a function execution, it's
// resolved once and then saved for subsequent use.
auto& vm = interpreter.vm();
cached_this_value = TRY(vm.resolve_this_binding());
}
interpreter.accumulator() = cached_this_value;
return {};
}
// https://tc39.es/ecma262/#sec-makesuperpropertyreference
ThrowCompletionOr<void> ResolveSuperBase::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// 1. Let env be GetThisEnvironment().
auto& env = verify_cast<FunctionEnvironment>(*get_this_environment(vm));
// 2. Assert: env.HasSuperBinding() is true.
VERIFY(env.has_super_binding());
// 3. Let baseValue be ? env.GetSuperBase().
interpreter.accumulator() = TRY(env.get_super_base());
return {};
}
ThrowCompletionOr<void> GetNewTarget::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = interpreter.vm().get_new_target();
return {};
}
ThrowCompletionOr<void> GetImportMeta::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = interpreter.vm().get_import_meta();
return {};
}
ThrowCompletionOr<void> JumpConditional::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> JumpNullish::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> JumpUndefined::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
// 13.3.8.1 https://tc39.es/ecma262/#sec-runtime-semantics-argumentlistevaluation
static MarkedVector<Value> argument_list_evaluation(Bytecode::Interpreter& interpreter)
{
// Note: Any spreading and actual evaluation is handled in preceding opcodes
// Note: The spec uses the concept of a list, while we create a temporary array
// in the preceding opcodes, so we have to convert in a manner that is not
// visible to the user
auto& vm = interpreter.vm();
MarkedVector<Value> argument_values { vm.heap() };
auto arguments = interpreter.accumulator();
auto& argument_array = arguments.as_array();
auto array_length = argument_array.indexed_properties().array_like_size();
argument_values.ensure_capacity(array_length);
for (size_t i = 0; i < array_length; ++i) {
if (auto maybe_value = argument_array.indexed_properties().get(i); maybe_value.has_value())
argument_values.append(maybe_value.release_value().value);
else
argument_values.append(js_undefined());
}
return argument_values;
}
ThrowCompletionOr<void> Call::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto callee = interpreter.reg(m_callee);
TRY(throw_if_needed_for_call(interpreter, *this, callee));
MarkedVector<Value> argument_values(vm.heap());
argument_values.ensure_capacity(m_argument_count);
for (u32 i = 0; i < m_argument_count; ++i) {
argument_values.unchecked_append(interpreter.reg(Register { m_first_argument.index() + i }));
}
interpreter.accumulator() = TRY(perform_call(interpreter, interpreter.reg(m_this_value), call_type(), callee, move(argument_values)));
return {};
}
ThrowCompletionOr<void> CallWithArgumentArray::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto callee = interpreter.reg(m_callee);
TRY(throw_if_needed_for_call(interpreter, *this, callee));
auto argument_values = argument_list_evaluation(interpreter);
interpreter.accumulator() = TRY(perform_call(interpreter, interpreter.reg(m_this_value), call_type(), callee, move(argument_values)));
return {};
}
// 13.3.7.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-super-keyword-runtime-semantics-evaluation
ThrowCompletionOr<void> SuperCallWithArgumentArray::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// 1. Let newTarget be GetNewTarget().
auto new_target = vm.get_new_target();
// 2. Assert: Type(newTarget) is Object.
VERIFY(new_target.is_object());
// 3. Let func be GetSuperConstructor().
auto* func = get_super_constructor(vm);
// 4. Let argList be ? ArgumentListEvaluation of Arguments.
MarkedVector<Value> arg_list { vm.heap() };
if (m_is_synthetic) {
auto const& value = interpreter.accumulator();
VERIFY(value.is_object() && is<Array>(value.as_object()));
auto const& array_value = static_cast<Array const&>(value.as_object());
auto length = MUST(length_of_array_like(vm, array_value));
for (size_t i = 0; i < length; ++i)
arg_list.append(array_value.get_without_side_effects(PropertyKey { i }));
} else {
arg_list = argument_list_evaluation(interpreter);
}
// 5. If IsConstructor(func) is false, throw a TypeError exception.
if (!Value(func).is_constructor())
return vm.throw_completion<TypeError>(ErrorType::NotAConstructor, "Super constructor");
// 6. Let result be ? Construct(func, argList, newTarget).
auto result = TRY(construct(vm, static_cast<FunctionObject&>(*func), move(arg_list), &new_target.as_function()));
// 7. Let thisER be GetThisEnvironment().
auto& this_environment = verify_cast<FunctionEnvironment>(*get_this_environment(vm));
// 8. Perform ? thisER.BindThisValue(result).
TRY(this_environment.bind_this_value(vm, result));
// 9. Let F be thisER.[[FunctionObject]].
auto& f = this_environment.function_object();
// 10. Assert: F is an ECMAScript function object.
// NOTE: This is implied by the strong C++ type.
// 11. Perform ? InitializeInstanceElements(result, F).
TRY(result->initialize_instance_elements(f));
// 12. Return result.
interpreter.accumulator() = result;
return {};
}
ThrowCompletionOr<void> NewFunction::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
interpreter.accumulator() = new_function(vm, m_function_node, m_lhs_name, m_home_object);
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& vm = interpreter.vm();
auto old_value = TRY(interpreter.accumulator().to_numeric(vm));
if (old_value.is_number())
interpreter.accumulator() = Value(old_value.as_double() + 1);
else
interpreter.accumulator() = BigInt::create(vm, old_value.as_bigint().big_integer().plus(Crypto::SignedBigInteger { 1 }));
return {};
}
ThrowCompletionOr<void> Decrement::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto old_value = TRY(interpreter.accumulator().to_numeric(vm));
if (old_value.is_number())
interpreter.accumulator() = Value(old_value.as_double() - 1);
else
interpreter.accumulator() = BigInt::create(vm, 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> ThrowIfNotObject::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
if (!interpreter.accumulator().is_object())
return vm.throw_completion<TypeError>(ErrorType::NotAnObject, interpreter.accumulator().to_string_without_side_effects());
return {};
}
ThrowCompletionOr<void> ThrowIfNullish::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto value = interpreter.accumulator();
if (value.is_nullish())
return vm.throw_completion<TypeError>(ErrorType::NotObjectCoercible, value.to_string_without_side_effects());
return {};
}
ThrowCompletionOr<void> EnterUnwindContext::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> ScheduleJump::execute_impl(Bytecode::Interpreter&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> LeaveLexicalEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.vm().running_execution_context().lexical_environment = interpreter.saved_lexical_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&) const
{
// Handled in the interpreter loop.
__builtin_unreachable();
}
ThrowCompletionOr<void> PushDeclarativeEnvironment::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto environment = interpreter.vm().heap().allocate_without_realm<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 = Object::create(interpreter.realm(), nullptr);
object->define_direct_property("result", yielded_value, JS::default_attributes);
if (m_continuation_label.has_value())
// FIXME: If we get a pointer, which is not accurately representable as a double
// will cause this to explode
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);
object->define_direct_property("isAwait", Value(false), JS::default_attributes);
interpreter.do_return(object);
return {};
}
ThrowCompletionOr<void> Await::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto yielded_value = interpreter.accumulator().value_or(js_undefined());
auto object = Object::create(interpreter.realm(), nullptr);
object->define_direct_property("result", yielded_value, JS::default_attributes);
// FIXME: If we get a pointer, which is not accurately representable as a double
// will cause this to explode
object->define_direct_property("continuation", Value(static_cast<double>(reinterpret_cast<u64>(&m_continuation_label.block()))), JS::default_attributes);
object->define_direct_property("isAwait", Value(true), JS::default_attributes);
interpreter.do_return(object);
return {};
}
ThrowCompletionOr<void> GetByValue::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = TRY(get_by_value(interpreter, interpreter.reg(m_base), interpreter.accumulator()));
return {};
}
ThrowCompletionOr<void> GetByValueWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the property key from the accumulator before side effects have a chance to overwrite it.
auto property_key_value = interpreter.accumulator();
auto object = TRY(interpreter.reg(m_base).to_object(vm));
auto property_key = TRY(property_key_value.to_property_key(vm));
interpreter.accumulator() = TRY(object->internal_get(property_key, interpreter.reg(m_this_value)));
return {};
}
ThrowCompletionOr<void> PutByValue::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto value = interpreter.accumulator();
TRY(put_by_value(vm, interpreter.reg(m_base), interpreter.reg(m_property), interpreter.accumulator(), m_kind));
interpreter.accumulator() = value;
return {};
}
ThrowCompletionOr<void> PutByValueWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the value from the accumulator before side effects have a chance to overwrite it.
auto value = interpreter.accumulator();
auto base = interpreter.reg(m_base);
auto property_key = m_kind != PropertyKind::Spread ? TRY(interpreter.reg(m_property).to_property_key(vm)) : PropertyKey {};
TRY(put_by_property_key(vm, base, interpreter.reg(m_this_value), value, property_key, m_kind));
interpreter.accumulator() = value;
return {};
}
ThrowCompletionOr<void> DeleteByValue::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the property key from the accumulator before side effects have a chance to overwrite it.
auto property_key_value = interpreter.accumulator();
auto base_value = interpreter.reg(m_base);
auto property_key = TRY(property_key_value.to_property_key(vm));
bool strict = vm.in_strict_mode();
auto reference = Reference { base_value, property_key, {}, strict };
interpreter.accumulator() = Value(TRY(reference.delete_(vm)));
return {};
}
ThrowCompletionOr<void> DeleteByValueWithThis::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
// NOTE: Get the property key from the accumulator before side effects have a chance to overwrite it.
auto property_key_value = interpreter.accumulator();
auto base_value = interpreter.reg(m_base);
auto property_key = TRY(property_key_value.to_property_key(vm));
bool strict = vm.in_strict_mode();
auto reference = Reference { base_value, property_key, interpreter.reg(m_this_value), strict };
interpreter.accumulator() = Value(TRY(reference.delete_(vm)));
return {};
}
ThrowCompletionOr<void> GetIterator::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator = TRY(get_iterator(vm, interpreter.accumulator(), m_hint));
interpreter.accumulator() = iterator_to_object(vm, iterator);
return {};
}
ThrowCompletionOr<void> GetMethod::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto identifier = interpreter.current_executable().get_identifier(m_property);
auto method = TRY(interpreter.accumulator().get_method(vm, identifier));
interpreter.accumulator() = method ?: js_undefined();
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).
auto& vm = interpreter.vm();
auto object = TRY(interpreter.accumulator().to_object(vm));
// 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;
OrderedHashTable<PropertyKey> non_enumerable_properties;
HashTable<NonnullGCPtr<Object>> seen_objects;
// Collect all keys immediately (invariant no. 5)
for (auto object_to_check = GCPtr { object.ptr() }; 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->internal_own_property_keys())) {
if (key.is_symbol())
continue;
auto property_key = TRY(PropertyKey::from_value(vm, key));
// If there is a non-enumerable property higher up the prototype chain with the same key,
// we mustn't include this property even if it's enumerable (invariant no. 5 and 6)
if (non_enumerable_properties.contains(property_key))
continue;
if (properties.contains(property_key))
continue;
auto descriptor = TRY(object_to_check->internal_get_own_property(property_key));
if (!*descriptor->enumerable)
non_enumerable_properties.set(move(property_key));
else
properties.set(move(property_key));
}
}
IteratorRecord iterator {
.iterator = object,
.next_method = NativeFunction::create(
interpreter.realm(),
[items = move(properties)](VM& vm) mutable -> ThrowCompletionOr<Value> {
auto& realm = *vm.current_realm();
auto iterated_object_value = vm.this_value();
if (!iterated_object_value.is_object())
return vm.throw_completion<InternalError>("Invalid state for GetObjectPropertyIterator.next"sv);
auto& iterated_object = iterated_object_value.as_object();
auto result_object = Object::create(realm, nullptr);
while (true) {
if (items.is_empty()) {
result_object->define_direct_property(vm.names.done, JS::Value(true), default_attributes);
return result_object;
}
auto key = items.take_first();
// 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, PrimitiveString::create(vm, TRY_OR_THROW_OOM(vm, String::number(key.as_number()))), default_attributes);
else if (key.is_string())
result_object->define_direct_property(vm.names.value, PrimitiveString::create(vm, key.as_string()), default_attributes);
else
VERIFY_NOT_REACHED(); // We should not have non-string/number keys.
return result_object;
}
},
1,
vm.names.next),
.done = false,
};
interpreter.accumulator() = iterator_to_object(vm, move(iterator));
return {};
}
ThrowCompletionOr<void> IteratorClose::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_object = TRY(interpreter.accumulator().to_object(vm));
auto iterator = object_to_iterator(vm, iterator_object);
// FIXME: Return the value of the resulting completion. (Note that m_completion_value can be empty!)
TRY(iterator_close(vm, iterator, Completion { m_completion_type, m_completion_value, {} }));
return {};
}
ThrowCompletionOr<void> AsyncIteratorClose::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_object = TRY(interpreter.accumulator().to_object(vm));
auto iterator = object_to_iterator(vm, iterator_object);
// FIXME: Return the value of the resulting completion. (Note that m_completion_value can be empty!)
TRY(async_iterator_close(vm, iterator, Completion { m_completion_type, m_completion_value, {} }));
return {};
}
ThrowCompletionOr<void> IteratorNext::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_object = TRY(interpreter.accumulator().to_object(vm));
auto iterator = object_to_iterator(vm, iterator_object);
interpreter.accumulator() = TRY(iterator_next(vm, iterator));
return {};
}
ThrowCompletionOr<void> IteratorResultDone::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_result = TRY(interpreter.accumulator().to_object(vm));
auto complete = TRY(iterator_complete(vm, iterator_result));
interpreter.accumulator() = Value(complete);
return {};
}
ThrowCompletionOr<void> IteratorResultValue::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto iterator_result = TRY(interpreter.accumulator().to_object(vm));
interpreter.accumulator() = TRY(iterator_value(vm, iterator_result));
return {};
}
ThrowCompletionOr<void> NewClass::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto name = m_class_expression.name();
auto super_class = interpreter.accumulator();
// NOTE: NewClass expects classEnv to be active lexical environment
auto class_environment = vm.lexical_environment();
vm.running_execution_context().lexical_environment = interpreter.saved_lexical_environment_stack().take_last();
DeprecatedFlyString binding_name;
DeprecatedFlyString class_name;
if (!m_class_expression.has_name() && m_lhs_name.has_value()) {
class_name = interpreter.current_executable().get_identifier(m_lhs_name.value());
} else {
binding_name = name;
class_name = name.is_null() ? ""sv : name;
}
interpreter.accumulator() = TRY(m_class_expression.create_class_constructor(vm, class_environment, vm.lexical_environment(), super_class, binding_name, class_name));
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
{
auto& vm = interpreter.vm();
interpreter.accumulator() = TRY(typeof_variable(vm, interpreter.current_executable().get_identifier(m_identifier)));
return {};
}
ThrowCompletionOr<void> TypeofLocal::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto const& value = vm.running_execution_context().local_variables[m_index];
interpreter.accumulator() = PrimitiveString::create(vm, value.typeof());
return {};
}
ThrowCompletionOr<void> ToNumeric::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.accumulator() = TRY(interpreter.accumulator().to_numeric(interpreter.vm()));
return {};
}
ThrowCompletionOr<void> BlockDeclarationInstantiation::execute_impl(Bytecode::Interpreter& interpreter) const
{
auto& vm = interpreter.vm();
auto old_environment = vm.running_execution_context().lexical_environment;
interpreter.saved_lexical_environment_stack().append(old_environment);
vm.running_execution_context().lexical_environment = new_declarative_environment(*old_environment);
m_scope_node.block_declaration_instantiation(vm, vm.running_execution_context().lexical_environment);
return {};
}
DeprecatedString Load::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("Load {}", m_src);
}
DeprecatedString LoadImmediate::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("LoadImmediate {}", m_value);
}
DeprecatedString Store::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("Store {}", m_dst);
}
DeprecatedString NewBigInt::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("NewBigInt \"{}\"", m_bigint.to_base_deprecated(10));
}
DeprecatedString NewArray::to_deprecated_string_impl(Bytecode::Executable const&) const
{
StringBuilder builder;
builder.append("NewArray"sv);
if (m_element_count != 0) {
builder.appendff(" [{}-{}]", m_elements[0], m_elements[1]);
}
return builder.to_deprecated_string();
}
DeprecatedString Append::to_deprecated_string_impl(Bytecode::Executable const&) const
{
if (m_is_spread)
return DeprecatedString::formatted("Append lhs: **{}", m_lhs);
return DeprecatedString::formatted("Append lhs: {}", m_lhs);
}
DeprecatedString IteratorToArray::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "IteratorToArray";
}
DeprecatedString NewString::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("NewString {} (\"{}\")", m_string, executable.string_table->get(m_string));
}
DeprecatedString NewObject::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "NewObject";
}
DeprecatedString NewRegExp::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("NewRegExp source:{} (\"{}\") flags:{} (\"{}\")", m_source_index, executable.get_string(m_source_index), m_flags_index, executable.get_string(m_flags_index));
}
DeprecatedString CopyObjectExcludingProperties::to_deprecated_string_impl(Bytecode::Executable const&) const
{
StringBuilder builder;
builder.appendff("CopyObjectExcludingProperties from:{}", m_from_object);
if (m_excluded_names_count != 0) {
builder.append(" excluding:["sv);
builder.join(", "sv, ReadonlySpan<Register>(m_excluded_names, m_excluded_names_count));
builder.append(']');
}
return builder.to_deprecated_string();
}
DeprecatedString ConcatString::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("ConcatString {}", m_lhs);
}
DeprecatedString GetCalleeAndThisFromEnvironment::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetCalleeAndThisFromEnvironment {} -> callee: {}, this:{} ", executable.identifier_table->get(m_identifier), m_callee_reg, m_this_reg);
}
DeprecatedString GetVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString GetGlobal::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetGlobal {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString GetLocal::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("GetLocal {}", m_index);
}
DeprecatedString DeleteVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("DeleteVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString CreateLexicalEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "CreateLexicalEnvironment"sv;
}
DeprecatedString CreateVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto mode_string = m_mode == EnvironmentMode::Lexical ? "Lexical" : "Variable";
return DeprecatedString::formatted("CreateVariable env:{} immutable:{} global:{} {} ({})", mode_string, m_is_immutable, m_is_global, m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString EnterObjectEnvironment::to_deprecated_string_impl(Executable const&) const
{
return DeprecatedString::formatted("EnterObjectEnvironment");
}
DeprecatedString SetVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto initialization_mode_name = m_initialization_mode == InitializationMode::Initialize ? "Initialize" : "Set";
auto mode_string = m_mode == EnvironmentMode::Lexical ? "Lexical" : "Variable";
return DeprecatedString::formatted("SetVariable env:{} init:{} {} ({})", mode_string, initialization_mode_name, m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString SetLocal::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("SetLocal {}", m_index);
}
static StringView property_kind_to_string(PropertyKind kind)
{
switch (kind) {
case PropertyKind::Getter:
return "getter"sv;
case PropertyKind::Setter:
return "setter"sv;
case PropertyKind::KeyValue:
return "key-value"sv;
case PropertyKind::DirectKeyValue:
return "direct-key-value"sv;
case PropertyKind::Spread:
return "spread"sv;
case PropertyKind::ProtoSetter:
return "proto-setter"sv;
}
VERIFY_NOT_REACHED();
}
DeprecatedString PutById::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto kind = property_kind_to_string(m_kind);
return DeprecatedString::formatted("PutById kind:{} base:{}, property:{} ({})", kind, m_base, m_property, executable.identifier_table->get(m_property));
}
DeprecatedString PutByIdWithThis::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto kind = property_kind_to_string(m_kind);
return DeprecatedString::formatted("PutByIdWithThis kind:{} base:{}, property:{} ({}) this_value:{}", kind, m_base, m_property, executable.identifier_table->get(m_property), m_this_value);
}
DeprecatedString PutPrivateById::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto kind = property_kind_to_string(m_kind);
return DeprecatedString::formatted("PutPrivateById kind:{} base:{}, property:{} ({})", kind, m_base, m_property, executable.identifier_table->get(m_property));
}
DeprecatedString GetById::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetById {} ({})", m_property, executable.identifier_table->get(m_property));
}
DeprecatedString GetByIdWithThis::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetByIdWithThis {} ({}) this_value:{}", m_property, executable.identifier_table->get(m_property), m_this_value);
}
DeprecatedString GetPrivateById::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetPrivateById {} ({})", m_property, executable.identifier_table->get(m_property));
}
DeprecatedString HasPrivateId::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("HasPrivateId {} ({})", m_property, executable.identifier_table->get(m_property));
}
DeprecatedString DeleteById::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("DeleteById {} ({})", m_property, executable.identifier_table->get(m_property));
}
DeprecatedString DeleteByIdWithThis::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("DeleteByIdWithThis {} ({}) this_value:{}", m_property, executable.identifier_table->get(m_property), m_this_value);
}
DeprecatedString Jump::to_deprecated_string_impl(Bytecode::Executable const&) const
{
if (m_true_target.has_value())
return DeprecatedString::formatted("Jump {}", *m_true_target);
return DeprecatedString::formatted("Jump <empty>");
}
DeprecatedString JumpConditional::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto true_string = m_true_target.has_value() ? DeprecatedString::formatted("{}", *m_true_target) : "<empty>";
auto false_string = m_false_target.has_value() ? DeprecatedString::formatted("{}", *m_false_target) : "<empty>";
return DeprecatedString::formatted("JumpConditional true:{} false:{}", true_string, false_string);
}
DeprecatedString JumpNullish::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto true_string = m_true_target.has_value() ? DeprecatedString::formatted("{}", *m_true_target) : "<empty>";
auto false_string = m_false_target.has_value() ? DeprecatedString::formatted("{}", *m_false_target) : "<empty>";
return DeprecatedString::formatted("JumpNullish null:{} nonnull:{}", true_string, false_string);
}
DeprecatedString JumpUndefined::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto true_string = m_true_target.has_value() ? DeprecatedString::formatted("{}", *m_true_target) : "<empty>";
auto false_string = m_false_target.has_value() ? DeprecatedString::formatted("{}", *m_false_target) : "<empty>";
return DeprecatedString::formatted("JumpUndefined undefined:{} not undefined:{}", true_string, false_string);
}
static StringView call_type_to_string(CallType type)
{
switch (type) {
case CallType::Call:
return ""sv;
case CallType::Construct:
return " (Construct)"sv;
case CallType::DirectEval:
return " (DirectEval)"sv;
}
VERIFY_NOT_REACHED();
}
DeprecatedString Call::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto type = call_type_to_string(m_type);
if (m_expression_string.has_value())
return DeprecatedString::formatted("Call{} callee:{}, this:{}, first_arg:{} ({})", type, m_callee, m_this_value, m_first_argument, executable.get_string(m_expression_string.value()));
return DeprecatedString::formatted("Call{} callee:{}, this:{}, first_arg:{}", type, m_callee, m_first_argument, m_this_value);
}
DeprecatedString CallWithArgumentArray::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
auto type = call_type_to_string(m_type);
if (m_expression_string.has_value())
return DeprecatedString::formatted("CallWithArgumentArray{} callee:{}, this:{}, arguments:[...acc] ({})", type, m_callee, m_this_value, executable.get_string(m_expression_string.value()));
return DeprecatedString::formatted("CallWithArgumentArray{} callee:{}, this:{}, arguments:[...acc]", type, m_callee, m_this_value);
}
DeprecatedString SuperCallWithArgumentArray::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "SuperCallWithArgumentArray arguments:[...acc]"sv;
}
DeprecatedString NewFunction::to_deprecated_string_impl(Bytecode::Executable const&) const
{
StringBuilder builder;
builder.append("NewFunction"sv);
if (m_function_node.has_name())
builder.appendff(" name:{}"sv, m_function_node.name());
if (m_lhs_name.has_value())
builder.appendff(" lhs_name:{}"sv, m_lhs_name.value());
if (m_home_object.has_value())
builder.appendff(" home_object:{}"sv, m_home_object.value());
return builder.to_deprecated_string();
}
DeprecatedString NewClass::to_deprecated_string_impl(Bytecode::Executable const&) const
{
StringBuilder builder;
auto name = m_class_expression.name();
builder.appendff("NewClass '{}'"sv, name.is_null() ? ""sv : name);
if (m_lhs_name.has_value())
builder.appendff(" lhs_name:{}"sv, m_lhs_name.value());
return builder.to_deprecated_string();
}
DeprecatedString Return::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "Return";
}
DeprecatedString Increment::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "Increment";
}
DeprecatedString Decrement::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "Decrement";
}
DeprecatedString Throw::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "Throw";
}
DeprecatedString ThrowIfNotObject::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "ThrowIfNotObject";
}
DeprecatedString ThrowIfNullish::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "ThrowIfNullish";
}
DeprecatedString EnterUnwindContext::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto handler_string = m_handler_target.has_value() ? DeprecatedString::formatted("{}", *m_handler_target) : "<empty>";
auto finalizer_string = m_finalizer_target.has_value() ? DeprecatedString::formatted("{}", *m_finalizer_target) : "<empty>";
return DeprecatedString::formatted("EnterUnwindContext handler:{} finalizer:{} entry:{}", handler_string, finalizer_string, m_entry_point);
}
DeprecatedString ScheduleJump::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("ScheduleJump {}", m_target);
}
DeprecatedString LeaveLexicalEnvironment::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "LeaveLexicalEnvironment"sv;
}
DeprecatedString LeaveUnwindContext::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "LeaveUnwindContext";
}
DeprecatedString ContinuePendingUnwind::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("ContinuePendingUnwind resume:{}", m_resume_target);
}
DeprecatedString PushDeclarativeEnvironment::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
StringBuilder builder;
builder.append("PushDeclarativeEnvironment"sv);
if (!m_variables.is_empty()) {
builder.append(" {"sv);
Vector<DeprecatedString> names;
for (auto& it : m_variables)
names.append(executable.get_string(it.key));
builder.append('}');
builder.join(", "sv, names);
}
return builder.to_deprecated_string();
}
DeprecatedString Yield::to_deprecated_string_impl(Bytecode::Executable const&) const
{
if (m_continuation_label.has_value())
return DeprecatedString::formatted("Yield continuation:@{}", m_continuation_label->block().name());
return DeprecatedString::formatted("Yield return");
}
DeprecatedString Await::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("Await continuation:@{}", m_continuation_label.block().name());
}
DeprecatedString GetByValue::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("GetByValue base:{}", m_base);
}
DeprecatedString GetByValueWithThis::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("GetByValueWithThis base:{} this_value:{}", m_base, m_this_value);
}
DeprecatedString PutByValue::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto kind = property_kind_to_string(m_kind);
return DeprecatedString::formatted("PutByValue kind:{} base:{}, property:{}", kind, m_base, m_property);
}
DeprecatedString PutByValueWithThis::to_deprecated_string_impl(Bytecode::Executable const&) const
{
auto kind = property_kind_to_string(m_kind);
return DeprecatedString::formatted("PutByValueWithThis kind:{} base:{}, property:{} this_value:{}", kind, m_base, m_property, m_this_value);
}
DeprecatedString DeleteByValue::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("DeleteByValue base:{}", m_base);
}
DeprecatedString DeleteByValueWithThis::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("DeleteByValueWithThis base:{} this_value:{}", m_base, m_this_value);
}
DeprecatedString GetIterator::to_deprecated_string_impl(Executable const&) const
{
auto hint = m_hint == IteratorHint::Sync ? "sync" : "async";
return DeprecatedString::formatted("GetIterator hint:{}", hint);
}
DeprecatedString GetMethod::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("GetMethod {} ({})", m_property, executable.identifier_table->get(m_property));
}
DeprecatedString GetObjectPropertyIterator::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "GetObjectPropertyIterator";
}
DeprecatedString IteratorClose::to_deprecated_string_impl(Bytecode::Executable const&) const
{
if (!m_completion_value.has_value())
return DeprecatedString::formatted("IteratorClose completion_type={} completion_value=<empty>", to_underlying(m_completion_type));
auto completion_value_string = m_completion_value->to_string_without_side_effects();
return DeprecatedString::formatted("IteratorClose completion_type={} completion_value={}", to_underlying(m_completion_type), completion_value_string);
}
DeprecatedString AsyncIteratorClose::to_deprecated_string_impl(Bytecode::Executable const&) const
{
if (!m_completion_value.has_value())
return DeprecatedString::formatted("AsyncIteratorClose completion_type={} completion_value=<empty>", to_underlying(m_completion_type));
auto completion_value_string = m_completion_value->to_string_without_side_effects();
return DeprecatedString::formatted("AsyncIteratorClose completion_type={} completion_value={}", to_underlying(m_completion_type), completion_value_string);
}
DeprecatedString IteratorNext::to_deprecated_string_impl(Executable const&) const
{
return "IteratorNext";
}
DeprecatedString IteratorResultDone::to_deprecated_string_impl(Executable const&) const
{
return "IteratorResultDone";
}
DeprecatedString IteratorResultValue::to_deprecated_string_impl(Executable const&) const
{
return "IteratorResultValue";
}
DeprecatedString ResolveThisBinding::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "ResolveThisBinding"sv;
}
DeprecatedString ResolveSuperBase::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "ResolveSuperBase"sv;
}
DeprecatedString GetNewTarget::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "GetNewTarget"sv;
}
DeprecatedString GetImportMeta::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "GetImportMeta"sv;
}
DeprecatedString TypeofVariable::to_deprecated_string_impl(Bytecode::Executable const& executable) const
{
return DeprecatedString::formatted("TypeofVariable {} ({})", m_identifier, executable.identifier_table->get(m_identifier));
}
DeprecatedString TypeofLocal::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("TypeofLocal {}", m_index);
}
DeprecatedString ToNumeric::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "ToNumeric"sv;
}
DeprecatedString BlockDeclarationInstantiation::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return "BlockDeclarationInstantiation"sv;
}
DeprecatedString ImportCall::to_deprecated_string_impl(Bytecode::Executable const&) const
{
return DeprecatedString::formatted("ImportCall specifier:{} options:{}"sv, m_specifier, m_options);
}
}