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LibJS: Don't enter finally blocks upon yield in bytecode mode

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Hendiadyoin1 2022-12-06 20:45:38 +01:00 • committed by Linus Groh
parent 088dc1b24b
commit 1f6a0ef6e0
1 changed files with 9 additions and 1 deletions
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10
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@ -75,8 +75,10 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable const& e
Bytecode::InstructionStreamIterator pc(m_current_block->instruction_stream());
TemporaryChange temp_change { m_pc, &pc };
// FIXME: This is getting kinda spaghetti-y
bool will_jump = false;
bool will_return = false;
bool will_yield = false;
while (!pc.at_end()) {
auto& instruction = *pc;
auto ran_or_error = instruction.execute(*this);
@ -113,6 +115,12 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable const& e
}
if (!m_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();
break;
}
++pc;
@ -121,7 +129,7 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable const& e
if (will_jump)
continue;
if (!unwind_contexts().is_empty()) {
if (!unwind_contexts().is_empty() && !will_yield) {
auto& unwind_context = unwind_contexts().last();
if (unwind_context.executable == m_current_executable && unwind_context.finalizer) {
m_saved_return_value = make_handle(m_return_value);