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LibJS+LibWeb: Make CyclicModule & GraphLoadingState GC-allocated

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This allows them to participate in the ownership graph and fixes a
lifetime issue in module loading found by ASAN.

Co-Authored-By: networkException <networkexception@serenityos.org>
This commit is contained in:
Andreas Kling 2023-11-17 12:14:18 +01:00
parent aa7501a66a
commit 0817d8bda6
6 changed files with 60 additions and 24 deletions
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13
Userland/Libraries/LibJS/CyclicModule.cpp
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@ -35,8 +35,17 @@ void CyclicModule::visit_edges(Cell::Visitor& visitor)
visitor.visit(loaded_module.module);
}
void GraphLoadingState::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(promise_capability);
visitor.visit(host_defined);
for (auto* module : visited)
visitor.visit(*module);
}
// 16.2.1.5.1 LoadRequestedModules ( [ hostDefined ] ), https://tc39.es/ecma262/#sec-LoadRequestedModules
PromiseCapability& CyclicModule::load_requested_modules(JS::Realm& realm, Optional<GraphLoadingState::HostDefined> host_defined)
PromiseCapability& CyclicModule::load_requested_modules(JS::Realm& realm, GCPtr<GraphLoadingState::HostDefined> host_defined)
{
// 1. If hostDefined is not present, let hostDefined be EMPTY.
// NOTE: The empty state is handled by hostDefined being an optional without value.
@ -45,7 +54,7 @@ PromiseCapability& CyclicModule::load_requested_modules(JS::Realm& realm, Option
auto promise_capability = MUST(new_promise_capability(realm.vm(), realm.intrinsics().promise_constructor()));
// 3. Let state be the GraphLoadingState Record { [[IsLoading]]: true, [[PendingModulesCount]]: 1, [[Visited]]: « », [[PromiseCapability]]: pc, [[HostDefined]]: hostDefined }.
auto state = GraphLoadingState { .promise_capability = promise_capability, .is_loading = true, .pending_module_count = 1, .visited = {}, .host_defined = move(host_defined) };
auto state = heap().allocate_without_realm<GraphLoadingState>(promise_capability, true, 1, HashTable<CyclicModule*> {}, move(host_defined));
// 4. Perform InnerModuleLoading(state, module).
inner_module_loading(state);