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LibJS: Move global symbol map from SymbolObject to Interpreter

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This allows different instances of the Interpreter to have their own
global symbols. Also makes Symbol non-copyable and non-moveable.
This commit is contained in:
Matthew Olsson 2020-07-06 16:57:22 -07:00 • committed by Andreas Kling
parent 4d8683b632
commit d9db6bec42
6 changed files with 48 additions and 115 deletions
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36
Libraries/LibJS/Interpreter.cpp
View file

@ -48,6 +48,19 @@ Interpreter::Interpreter()
: m_heap(*this)
, m_console(*this)
{
m_well_known_symbol_map.set("iterator", js_symbol(*this, "Symbol.iterator", false));
m_well_known_symbol_map.set("asyncIterator", js_symbol(*this, "Symbol.asyncIterator", false));
m_well_known_symbol_map.set("match", js_symbol(*this, "Symbol.match", false));
m_well_known_symbol_map.set("matchAll", js_symbol(*this, "Symbol.matchAll", false));
m_well_known_symbol_map.set("replace", js_symbol(*this, "Symbol.replace", false));
m_well_known_symbol_map.set("search", js_symbol(*this, "Symbol.search", false));
m_well_known_symbol_map.set("split", js_symbol(*this, "Symbol.split", false));
m_well_known_symbol_map.set("hasInstance", js_symbol(*this, "Symbol.hasInstance", false));
m_well_known_symbol_map.set("isConcatSpreadable", js_symbol(*this, "Symbol.isConcatSpreadable", false));
m_well_known_symbol_map.set("unscopables", js_symbol(*this, "Symbol.unscopables", false));
m_well_known_symbol_map.set("species", js_symbol(*this, "Symbol.species", false));
m_well_known_symbol_map.set("toPrimitive", js_symbol(*this, "Symbol.toPrimitive", false));
m_well_known_symbol_map.set("toStringTag", js_symbol(*this, "Symbol.toStringTag", false));
}
Interpreter::~Interpreter()
@ -201,6 +214,23 @@ Reference Interpreter::get_reference(const FlyString& name)
return { Reference::GlobalVariable, name };
}
Symbol* Interpreter::get_global_symbol(const String& description)
{
auto result = m_global_symbol_map.get(description);
if (result.has_value())
return result.value();
auto new_global_symbol = js_symbol(*this, description, true);
m_global_symbol_map.set(description, new_global_symbol);
return new_global_symbol;
}
Symbol* Interpreter::get_well_known_symbol(const String& description) const
{
ASSERT(m_well_known_symbol_map.contains(description));
return m_well_known_symbol_map.get(description).value();
}
void Interpreter::gather_roots(Badge<Heap>, HashTable<Cell*>& roots)
{
roots.set(m_global_object);
@ -219,7 +249,11 @@ void Interpreter::gather_roots(Badge<Heap>, HashTable<Cell*>& roots)
roots.set(call_frame.environment);
}
SymbolObject::gather_symbol_roots(roots);
for (auto& symbol : m_well_known_symbol_map)
roots.set(symbol.value);
for (auto& symbol : m_global_symbol_map)
roots.set(symbol.value);
}
Value Interpreter::call(Function& function, Value this_value, Optional<MarkedValueList> arguments)

7
Libraries/LibJS/Interpreter.h
View file

@ -111,6 +111,10 @@ public:
Reference get_reference(const FlyString& name);
Symbol* get_global_symbol(const String& description);
Symbol* get_well_known_symbol(const String& description) const;
const HashMap<String, Symbol*>& get_well_known_symbol_map(Badge<SymbolConstructor>) const { return m_well_known_symbol_map; };
void gather_roots(Badge<Heap>, HashTable<Cell*>&);
void enter_scope(const ScopeNode&, ArgumentVector, ScopeType, GlobalObject&);
@ -217,6 +221,9 @@ private:
Object* m_global_object { nullptr };
HashMap<String, Symbol*> m_well_known_symbol_map;
HashMap<String, Symbol*> m_global_symbol_map;
Exception* m_exception { nullptr };
ScopeType m_unwind_until { ScopeType::None };

3
Libraries/LibJS/Runtime/Symbol.h
View file

@ -32,6 +32,9 @@
namespace JS {
class Symbol final : public Cell {
AK_MAKE_NONCOPYABLE(Symbol)
AK_MAKE_NONMOVABLE(Symbol)
public:
Symbol(String, bool);
virtual ~Symbol();

19
Libraries/LibJS/Runtime/SymbolConstructor.cpp
View file

@ -46,21 +46,8 @@ void SymbolConstructor::initialize(Interpreter& interpreter, GlobalObject& globa
define_native_function("for", for_, 1, Attribute::Writable | Attribute::Configurable);
define_native_function("keyFor", key_for, 1, Attribute::Writable | Attribute::Configurable);
SymbolObject::initialize_well_known_symbols(interpreter);
define_property("iterator", SymbolObject::well_known_iterator(), 0);
define_property("asyncIterator", SymbolObject::well_known_async_terator(), 0);
define_property("match", SymbolObject::well_known_match(), 0);
define_property("matchAll", SymbolObject::well_known_match_all(), 0);
define_property("replace", SymbolObject::well_known_replace(), 0);
define_property("search", SymbolObject::well_known_search(), 0);
define_property("split", SymbolObject::well_known_split(), 0);
define_property("hasInstance", SymbolObject::well_known_has_instance(), 0);
define_property("isConcatSpreadable", SymbolObject::well_known_is_concat_spreadable(), 0);
define_property("unscopables", SymbolObject::well_known_unscopables(), 0);
define_property("species", SymbolObject::well_known_species(), 0);
define_property("toPrimitive", SymbolObject::well_known_to_primtive(), 0);
define_property("toStringTag", SymbolObject::well_known_to_string_tag(), 0);
for (auto& entry : interpreter.get_well_known_symbol_map({}))
define_property(entry.key, entry.value, 0);
}
SymbolConstructor::~SymbolConstructor()
@ -89,7 +76,7 @@ JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::for_)
description = interpreter.argument(0).to_string(interpreter);
}
return SymbolObject::get_global(interpreter, description);
return interpreter.get_global_symbol(description);
}
JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::key_for)

63
Libraries/LibJS/Runtime/SymbolObject.cpp
View file

@ -34,21 +34,6 @@
namespace JS {
HashMap<String, Value> SymbolObject::s_global_symbol_map;
Value SymbolObject::s_well_known_iterator;
Value SymbolObject::s_well_known_async_terator;
Value SymbolObject::s_well_known_match;
Value SymbolObject::s_well_known_match_all;
Value SymbolObject::s_well_known_replace;
Value SymbolObject::s_well_known_search;
Value SymbolObject::s_well_known_split;
Value SymbolObject::s_well_known_has_instance;
Value SymbolObject::s_well_known_is_concat_spreadable;
Value SymbolObject::s_well_known_unscopables;
Value SymbolObject::s_well_known_species;
Value SymbolObject::s_well_known_to_primtive;
Value SymbolObject::s_well_known_to_string_tag;
SymbolObject* SymbolObject::create(GlobalObject& global_object, Symbol& primitive_symbol)
{
@ -65,54 +50,6 @@ SymbolObject::~SymbolObject()
{
}
Value SymbolObject::get_global(Interpreter& interpreter, String description)
{
auto global_symbol = s_global_symbol_map.get(description);
if (global_symbol.has_value())
return global_symbol.value();
auto symbol = js_symbol(interpreter, description, true);
s_global_symbol_map.set(description, symbol);
return Value(symbol);
}
void SymbolObject::initialize_well_known_symbols(Interpreter& interpreter)
{
SymbolObject::s_well_known_iterator = Value(js_symbol(interpreter, "Symbol.iterator", false));
SymbolObject::s_well_known_async_terator = Value(js_symbol(interpreter, "Symbol.asyncIterator", false));
SymbolObject::s_well_known_match = Value(js_symbol(interpreter, "Symbol.match", false));
SymbolObject::s_well_known_match_all = Value(js_symbol(interpreter, "Symbol.matchAll", false));
SymbolObject::s_well_known_replace = Value(js_symbol(interpreter, "Symbol.replace", false));
SymbolObject::s_well_known_search = Value(js_symbol(interpreter, "Symbol.search", false));
SymbolObject::s_well_known_split = Value(js_symbol(interpreter, "Symbol.split", false));
SymbolObject::s_well_known_has_instance = Value(js_symbol(interpreter, "Symbol.hasInstance", false));
SymbolObject::s_well_known_is_concat_spreadable = Value(js_symbol(interpreter, "Symbol.isConcatSpreadable", false));
SymbolObject::s_well_known_unscopables = Value(js_symbol(interpreter, "Symbol.unscopables", false));
SymbolObject::s_well_known_species = Value(js_symbol(interpreter, "Symbol.species", false));
SymbolObject::s_well_known_to_primtive = Value(js_symbol(interpreter, "Symbol.toPrimitive", false));
SymbolObject::s_well_known_to_string_tag = Value(js_symbol(interpreter, "Symbol.toStringTag", false));
}
void SymbolObject::gather_symbol_roots(HashTable<Cell*>& roots)
{
for (auto& global_symbol : s_global_symbol_map)
roots.set(&global_symbol.value.as_symbol());
roots.set(&s_well_known_iterator.as_symbol());
roots.set(&s_well_known_async_terator.as_symbol());
roots.set(&s_well_known_match.as_symbol());
roots.set(&s_well_known_match_all.as_symbol());
roots.set(&s_well_known_replace.as_symbol());
roots.set(&s_well_known_search.as_symbol());
roots.set(&s_well_known_split.as_symbol());
roots.set(&s_well_known_has_instance.as_symbol());
roots.set(&s_well_known_is_concat_spreadable.as_symbol());
roots.set(&s_well_known_unscopables.as_symbol());
roots.set(&s_well_known_species.as_symbol());
roots.set(&s_well_known_to_primtive.as_symbol());
roots.set(&s_well_known_to_string_tag.as_symbol());
}
void SymbolObject::visit_children(Cell::Visitor& visitor)
{
Object::visit_children(visitor);

35
Libraries/LibJS/Runtime/SymbolObject.h
View file

@ -46,51 +46,16 @@ public:
const String& description() const { return m_symbol.description(); }
bool is_global() const { return m_symbol.is_global(); }
static Value get_global(Interpreter&, String description);
virtual Value value_of() const override
{
return Value(&m_symbol);
}
static void initialize_well_known_symbols(Interpreter&);
static void gather_symbol_roots(HashTable<Cell*>& roots);
static Value well_known_iterator() { return s_well_known_iterator; };
static Value well_known_async_terator() { return s_well_known_async_terator; };
static Value well_known_match() { return s_well_known_match; };
static Value well_known_match_all() { return s_well_known_match_all; };
static Value well_known_replace() { return s_well_known_replace; };
static Value well_known_search() { return s_well_known_search; };
static Value well_known_split() { return s_well_known_split; };
static Value well_known_has_instance() { return s_well_known_has_instance; };
static Value well_known_is_concat_spreadable() { return s_well_known_is_concat_spreadable; };
static Value well_known_unscopables() { return s_well_known_unscopables; };
static Value well_known_species() { return s_well_known_species; };
static Value well_known_to_primtive() { return s_well_known_to_primtive; };
static Value well_known_to_string_tag() { return s_well_known_to_string_tag; };
private:
virtual void visit_children(Visitor&) override;
virtual bool is_symbol_object() const override { return true; }
Symbol& m_symbol;
static HashMap<String, Value> s_global_symbol_map;
static Value s_well_known_iterator;
static Value s_well_known_async_terator;
static Value s_well_known_match;
static Value s_well_known_match_all;
static Value s_well_known_replace;
static Value s_well_known_search;
static Value s_well_known_split;
static Value s_well_known_has_instance;
static Value s_well_known_is_concat_spreadable;
static Value s_well_known_unscopables;
static Value s_well_known_species;
static Value s_well_known_to_primtive;
static Value s_well_known_to_string_tag;
};
}