Stowage/ladybird
2
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-12-07 21:59:54 +00:00
Code Issues Projects Releases Packages Wiki Activity

LibJS: Let JS::Script remember whether its code is strict mode

Browse source 
We don't want to rely on having the AST node just to answer the question
"is this script strict mode?"
This commit is contained in:
Andreas Kling 2025-10-26 12:33:54 +01:00 • committed by Andreas Kling
parent b712caf855
commit 892c7d980e
Notes: github-actions[bot] 2025-10-27 20:15:42 +00:00
3 changed files with 11 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

2
Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -250,7 +250,7 @@ ThrowCompletionOr<Value> Interpreter::run(Script& script_record, GC::Ptr<Environ
// 8. Set the PrivateEnvironment of scriptContext to null.
// NOTE: This isn't in the spec, but we require it.
script_context->is_strict_mode = script_record.parse_node().is_strict_mode();
script_context->is_strict_mode = script_record.is_strict_mode();
// 9. Suspend the currently running execution context.
// 10. Push scriptContext onto the execution context stack; scriptContext is now the running execution context.

7
Libraries/LibJS/Script.cpp
View file

@ -25,15 +25,18 @@ Result<GC::Ref<Script>, Vector<ParserError>> Script::parse(StringView source_tex
if (parser.has_errors())
return parser.errors();
bool strict_mode = script->is_strict_mode();
// 3. Return Script Record { [[Realm]]: realm, [[ECMAScriptCode]]: script, [[HostDefined]]: hostDefined }.
return realm.heap().allocate<Script>(realm, filename, move(script), host_defined);
return realm.heap().allocate<Script>(realm, filename, move(script), host_defined, strict_mode);
}
Script::Script(Realm& realm, StringView filename, NonnullRefPtr<Program> parse_node, HostDefined* host_defined)
Script::Script(Realm& realm, StringView filename, NonnullRefPtr<Program> parse_node, HostDefined* host_defined, bool strict_mode)
: m_realm(realm)
, m_parse_node(move(parse_node))
, m_filename(filename)
, m_host_defined(host_defined)
, m_strict_mode(strict_mode)
{
}

6
Libraries/LibJS/Script.h
View file

@ -46,8 +46,10 @@ public:
HostDefined* host_defined() const { return m_host_defined; }
StringView filename() const LIFETIME_BOUND { return m_filename; }
[[nodiscard]] bool is_strict_mode() const { return m_strict_mode; }
private:
Script(Realm&, StringView filename, NonnullRefPtr<Program>, HostDefined* = nullptr);
Script(Realm&, StringView filename, NonnullRefPtr<Program>, HostDefined*, bool strict_mode);
virtual void visit_edges(Cell::Visitor&) override;
@ -58,6 +60,8 @@ private:
// Needed for potential lookups of modules.
ByteString m_filename;
HostDefined* m_host_defined { nullptr }; // [[HostDefined]]
bool m_strict_mode { false };
};
}