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LibJS/Bytecode: Throw on destructuring object assignment to nullish LHS

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24 new passes on test262. :^)
This commit is contained in:
Andreas Kling 2023-06-25 08:50:07 +02:00
parent 4032bfc2fc
commit 8021048bc9
4 changed files with 30 additions and 0 deletions
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2
Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
View file

@ -989,6 +989,8 @@ Bytecode::CodeGenerationErrorOr<void> FunctionExpression::generate_bytecode(Byte
static Bytecode::CodeGenerationErrorOr<void> generate_object_binding_pattern_bytecode(Bytecode::Generator& generator, BindingPattern const& pattern, Bytecode::Op::SetVariable::InitializationMode initialization_mode, Bytecode::Register const& value_reg, bool create_variables)
{
generator.emit<Bytecode::Op::ThrowIfNullish>();
Vector<Bytecode::Register> excluded_property_names;
auto has_rest = false;
if (pattern.entries.size() > 0)

1
Userland/Libraries/LibJS/Bytecode/Instruction.h
View file

@ -92,6 +92,7 @@
O(SuperCall) \
O(Throw) \
O(ThrowIfNotObject) \
O(ThrowIfNullish) \
O(ToNumeric) \
O(Typeof) \
O(TypeofVariable) \

14
Userland/Libraries/LibJS/Bytecode/Op.cpp
View file

@ -844,6 +844,15 @@ ThrowCompletionOr<void> ThrowIfNotObject::execute_impl(Bytecode::Interpreter& in
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, TRY_OR_THROW_OOM(vm, value.to_string_without_side_effects()));
return {};
}
ThrowCompletionOr<void> EnterUnwindContext::execute_impl(Bytecode::Interpreter& interpreter) const
{
interpreter.enter_unwind_context(m_handler_target, m_finalizer_target);
@ -1432,6 +1441,11 @@ DeprecatedString ThrowIfNotObject::to_deprecated_string_impl(Bytecode::Executabl
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>";

13
Userland/Libraries/LibJS/Bytecode/Op.h
View file

@ -958,6 +958,19 @@ public:
void replace_references_impl(Register, Register) { }
};
class ThrowIfNullish final : public Instruction {
public:
ThrowIfNullish()
: Instruction(Type::ThrowIfNullish)
{
}
ThrowCompletionOr<void> execute_impl(Bytecode::Interpreter&) const;
DeprecatedString to_deprecated_string_impl(Bytecode::Executable const&) const;
void replace_references_impl(BasicBlock const&, BasicBlock const&) { }
void replace_references_impl(Register, Register) { }
};
class EnterUnwindContext final : public Instruction {
public:
constexpr static bool IsTerminator = true;