// FIXME: There's no need to add the function's name to the key here. It's already in the source code.
UnlinkedFunctionExecutable* CodeCache::getFunctionExecutableFromGlobalCode(VM& vm, const Identifier& name, const SourceCode& source, ParserError& error)
{
bool isArrowFunctionContext = false;
SourceCodeKey key(
source, name.string(), SourceCodeType::FunctionType,
JSParserBuiltinMode::NotBuiltin,
JSParserStrictMode::NotStrict,
JSParserCommentMode::Classic,
DerivedContextType::None,
EvalContextType::None,
isArrowFunctionContext);
SourceCodeValue* cache = m_sourceCode.findCacheAndUpdateAge(key);
if (cache) {
UnlinkedFunctionExecutable* executable = jsCast<UnlinkedFunctionExecutable*>(cache->cell.get());
source.provider()->setSourceURLDirective(executable->sourceURLDirective());
source.provider()->setSourceMappingURLDirective(executable->sourceMappingURLDirective());
return executable;
}
JSTextPosition positionBeforeLastNewline;
std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
&vm, source, Identifier(), JSParserBuiltinMode::NotBuiltin,
JSParserStrictMode::NotStrict, JSParserCommentMode::Classic, SourceParseMode::ProgramMode, SuperBinding::NotNeeded,
error, &positionBeforeLastNewline);
if (!program) {
RELEASE_ASSERT(error.isValid());
return nullptr;
}
// This function assumes an input string that would result in a single function declaration.
StatementNode* statement = program->singleStatement();
ASSERT(statement);
ASSERT(statement->isBlock());
if (!statement || !statement->isBlock())
return nullptr;
StatementNode* funcDecl = static_cast<BlockNode*>(statement)->singleStatement();
ASSERT(funcDecl);
ASSERT(funcDecl->isFuncDeclNode());
if (!funcDecl || !funcDecl->isFuncDeclNode())
return nullptr;
FunctionMetadataNode* metadata = static_cast<FuncDeclNode*>(funcDecl)->metadata();
ASSERT(metadata);
if (!metadata)
return nullptr;
metadata->overrideName(name);
metadata->setEndPosition(positionBeforeLastNewline);
// The Function constructor only has access to global variables, so no variables will be under TDZ.
VariableEnvironment emptyTDZVariables;
UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, UnlinkedNormalFunction, ConstructAbility::CanConstruct, JSParserCommentMode::Classic, emptyTDZVariables, DerivedContextType::None);
functionExecutable->setSourceURLDirective(source.provider()->sourceURL());
functionExecutable->setSourceMappingURLDirective(source.provider()->sourceMappingURL());
m_sourceCode.addCache(key, SourceCodeValue(vm, functionExecutable, m_sourceCode.age()));
return functionExecutable;
}
BuiltinExecutables::BuiltinExecutables(VM& vm)
: m_vm(vm)
#define INITIALIZE_BUILTIN_SOURCE_MEMBERS(name, functionName, length) , m_##name##Source(makeSource(StringImpl::createFromLiteral(s_##name, length)))
JSC_FOREACH_BUILTIN_CODE(INITIALIZE_BUILTIN_SOURCE_MEMBERS)
#undef EXPOSE_BUILTIN_STRINGS
{
}
UnlinkedFunctionExecutable* BuiltinExecutables::createDefaultConstructor(ConstructorKind constructorKind, const Identifier& name)
{
static NeverDestroyed<const String> baseConstructorCode(ASCIILiteral("(function () { })"));
static NeverDestroyed<const String> derivedConstructorCode(ASCIILiteral("(function () { super(...arguments); })"));
switch (constructorKind) {
case ConstructorKind::None:
break;
case ConstructorKind::Base:
return createExecutable(m_vm, makeSource(baseConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
case ConstructorKind::Extends:
return createExecutable(m_vm, makeSource(derivedConstructorCode), name, constructorKind, ConstructAbility::CanConstruct);
}
ASSERT_NOT_REACHED();
return nullptr;
}
UnlinkedFunctionExecutable* BuiltinExecutables::createBuiltinExecutable(const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
{
return createExecutable(m_vm, code, name, ConstructorKind::None, constructAbility);
}
UnlinkedFunctionExecutable* createBuiltinExecutable(VM& vm, const SourceCode& code, const Identifier& name, ConstructAbility constructAbility)
{
return BuiltinExecutables::createExecutable(vm, code, name, ConstructorKind::None, constructAbility);
}
UnlinkedFunctionExecutable* BuiltinExecutables::createExecutable(VM& vm, const SourceCode& source, const Identifier& name, ConstructorKind constructorKind, ConstructAbility constructAbility)
{
JSTextPosition positionBeforeLastNewline;
ParserError error;
bool isParsingDefaultConstructor = constructorKind != ConstructorKind::None;
JSParserBuiltinMode builtinMode = isParsingDefaultConstructor ? JSParserBuiltinMode::NotBuiltin : JSParserBuiltinMode::Builtin;
UnlinkedFunctionKind kind = isParsingDefaultConstructor ? UnlinkedNormalFunction : UnlinkedBuiltinFunction;
RefPtr<SourceProvider> sourceOverride = isParsingDefaultConstructor ? source.provider() : nullptr;
std::unique_ptr<ProgramNode> program = parse<ProgramNode>(
&vm, source, Identifier(), builtinMode,
JSParserStrictMode::NotStrict, SourceParseMode::ProgramMode, SuperBinding::NotNeeded, error,
&positionBeforeLastNewline, constructorKind);
if (!program) {
dataLog("Fatal error compiling builtin function '", name.string(), "': ", error.message());
CRASH();
}
StatementNode* exprStatement = program->singleStatement();
RELEASE_ASSERT(exprStatement);
RELEASE_ASSERT(exprStatement->isExprStatement());
ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
RELEASE_ASSERT(funcExpr);
RELEASE_ASSERT(funcExpr->isFuncExprNode());
FunctionMetadataNode* metadata = static_cast<FuncExprNode*>(funcExpr)->metadata();
RELEASE_ASSERT(!program->hasCapturedVariables());
metadata->setEndPosition(positionBeforeLastNewline);
RELEASE_ASSERT(metadata);
RELEASE_ASSERT(metadata->ident().isNull());
// This function assumes an input string that would result in a single anonymous function expression.
metadata->setEndPosition(positionBeforeLastNewline);
RELEASE_ASSERT(metadata);
metadata->overrideName(name);
VariableEnvironment dummyTDZVariables;
UnlinkedFunctionExecutable* functionExecutable = UnlinkedFunctionExecutable::create(&vm, source, metadata, kind, constructAbility, dummyTDZVariables, DerivedContextType::None, WTFMove(sourceOverride));
return functionExecutable;
}
