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LibJS+Everywhere: Make PrimitiveString and Utf16String fallible

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This makes construction of Utf16String fallible in OOM conditions. The
immediate impact is that PrimitiveString must then be fallible as well,
as it may either transcode UTF-8 to UTF-16, or create a UTF-16 string
from ropes.

There are a couple of places where it is very non-trivial to propagate
the error further. A FIXME has been added to those locations.
This commit is contained in:
Timothy Flynn 2023-01-07 12:24:05 -05:00 • committed by Linus Groh
parent d793262beb
commit 115baa7e32
57 changed files with 306 additions and 295 deletions
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4
Userland/Libraries/LibJS/Runtime/ShadowRealm.cpp
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@ -86,7 +86,7 @@ ThrowCompletionOr<void> copy_name_and_length(VM& vm, FunctionObject& function, F
target_name = PrimitiveString::create(vm, DeprecatedString::empty());
// 8. Perform SetFunctionName(F, targetName, prefix).
function.set_function_name({ target_name.as_string().deprecated_string() }, move(prefix));
function.set_function_name({ TRY(target_name.as_string().deprecated_string()) }, move(prefix));
return {};
}
@ -272,7 +272,7 @@ ThrowCompletionOr<Value> shadow_realm_import_value(VM& vm, DeprecatedString spec
// NOTE: Even though the spec tells us to use %ThrowTypeError%, it's not observable if we actually do.
// Throw a nicer TypeError forwarding the import error message instead (we know the argument is an Error object).
auto throw_type_error = NativeFunction::create(realm, {}, [](auto& vm) -> ThrowCompletionOr<Value> {
return vm.template throw_completion<TypeError>(vm.argument(0).as_object().get_without_side_effects(vm.names.message).as_string().deprecated_string());
return vm.template throw_completion<TypeError>(TRY(vm.argument(0).as_object().get_without_side_effects(vm.names.message).as_string().deprecated_string()));
});
// 13. Return PerformPromiseThen(innerCapability.[[Promise]], onFulfilled, callerRealm.[[Intrinsics]].[[%ThrowTypeError%]], promiseCapability).