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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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2
Userland/Libraries/LibJS/Bytecode/Op.cpp
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@ -836,6 +836,8 @@ ThrowCompletionOr<void> Yield::execute_impl(Bytecode::Interpreter& interpreter)
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);