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LibJS+LibWeb: Make HTML::Script GC-allocated

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This allows the garbage collector to keep HTML::Script objects alive and
fixes a bug where a HTMLScriptElement could get GC'd while its code was
executing.
This commit is contained in:
Andreas Kling 2022-09-05 14:32:33 +02:00
parent 00c8f07192
commit 8f9ed415a0
Notes: sideshowbarker 2024-07-17 07:23:32 +09:00
6 changed files with 35 additions and 12 deletions
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25
Userland/Libraries/LibWeb/HTML/Scripting/ClassicScript.cpp
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@ -16,8 +16,10 @@
namespace Web::HTML {
// https://html.spec.whatwg.org/multipage/webappapis.html#creating-a-classic-script
NonnullRefPtr<ClassicScript> ClassicScript::create(String filename, StringView source, EnvironmentSettingsObject& environment_settings_object, AK::URL base_url, size_t source_line_number, MutedErrors muted_errors)
JS::NonnullGCPtr<ClassicScript> ClassicScript::create(String filename, StringView source, EnvironmentSettingsObject& environment_settings_object, AK::URL base_url, size_t source_line_number, MutedErrors muted_errors)
{
auto& vm = environment_settings_object.realm().vm();
// 1. If muted errors was not provided, let it be false. (NOTE: This is taken care of by the default argument.)
// 2. If muted errors is true, then set baseURL to about:blank.
@ -29,7 +31,7 @@ NonnullRefPtr<ClassicScript> ClassicScript::create(String filename, StringView s
source = ""sv;
// 4. Let script be a new classic script that this algorithm will subsequently initialize.
auto script = adopt_ref(*new ClassicScript(move(base_url), move(filename), environment_settings_object));
auto script = vm.heap().allocate_without_realm<ClassicScript>(move(base_url), move(filename), environment_settings_object);
// 5. Set script's settings object to settings. (NOTE: This was already done when constructing.)
@ -45,7 +47,7 @@ NonnullRefPtr<ClassicScript> ClassicScript::create(String filename, StringView s
// 10. Let result be ParseScript(source, settings's Realm, script).
auto parse_timer = Core::ElapsedTimer::start_new();
auto result = JS::Script::parse(source, environment_settings_object.realm(), script->filename(), script.ptr(), source_line_number);
auto result = JS::Script::parse(source, environment_settings_object.realm(), script->filename(), script, source_line_number);
dbgln_if(HTML_SCRIPT_DEBUG, "ClassicScript: Parsed {} in {}ms", script->filename(), parse_timer.elapsed());
// 11. If result is a list of errors, then:
@ -58,14 +60,14 @@ NonnullRefPtr<ClassicScript> ClassicScript::create(String filename, StringView s
script->m_error_to_rethrow = parse_error;
// 2. Return script.
return script;
return JS::NonnullGCPtr(*script);
}
// 12. Set script's record to result.
script->m_script_record = result.release_value();
script->m_script_record = *result.release_value();
// 13. Return script.
return script;
return JS::NonnullGCPtr(*script);
}
// https://html.spec.whatwg.org/multipage/webappapis.html#run-a-classic-script
@ -158,4 +160,15 @@ ClassicScript::ClassicScript(AK::URL base_url, String filename, EnvironmentSetti
ClassicScript::~ClassicScript() = default;
void ClassicScript::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_script_record);
}
void ClassicScript::visit_host_defined_self(Cell::Visitor& visitor)
{
visitor.visit(this);
}
}