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LibJS: Align codegen AwaitExpressions to YieldExpressions

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We use generators in bytecode to approximate async functions, but the
code generated by AwaitExpressions did not have the value processing
paths that Yield requires, eg the `generator.throw()` path, which is
used by AsyncFunctionDriverWrapper to signal Promise rejections.
This commit is contained in:
Hendiadyoin1 2022-12-25 17:15:29 +01:00 • committed by Linus Groh
parent 1f6a0ef6e0
commit de514f29ad
4 changed files with 47 additions and 3 deletions
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3
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@ -169,7 +169,7 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable const& e
if (!m_return_value.is_empty()) {
return_value = m_return_value;
m_return_value = {};
} else if (!m_saved_return_value.is_null()) {
} else if (!m_saved_return_value.is_null() && m_saved_exception.is_null()) {
return_value = m_saved_return_value.value();
m_saved_return_value = {};
}
@ -192,6 +192,7 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable const& e
if (!m_saved_exception.is_null()) {
Value thrown_value = m_saved_exception.value();
m_saved_exception = {};
m_saved_return_value = {};
if (auto* register_window = frame.get_pointer<NonnullOwnPtr<RegisterWindow>>())
return { throw_completion(thrown_value), move(*register_window) };
return { throw_completion(thrown_value), nullptr };