FunctionPrototype.cpp [plain text]
#include "config.h"
#include "FunctionPrototype.h"
#include "BuiltinExecutables.h"
#include "BuiltinNames.h"
#include "Error.h"
#include "GetterSetter.h"
#include "JSAsyncFunction.h"
#include "JSCInlines.h"
#include "JSFunction.h"
#include "JSStringInlines.h"
#include "Lexer.h"
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(FunctionPrototype);
const ClassInfo FunctionPrototype::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(FunctionPrototype) };
static EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState*);
static EncodedJSValue JSC_HOST_CALL callFunctionPrototype(ExecState*)
{
return JSValue::encode(jsUndefined());
}
FunctionPrototype::FunctionPrototype(VM& vm, Structure* structure)
: InternalFunction(vm, structure, callFunctionPrototype, nullptr)
{
}
void FunctionPrototype::finishCreation(VM& vm, const String& name)
{
Base::finishCreation(vm, name);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
}
void FunctionPrototype::addFunctionProperties(ExecState* exec, JSGlobalObject* globalObject, JSFunction** callFunction, JSFunction** applyFunction, JSFunction** hasInstanceSymbolFunction)
{
VM& vm = exec->vm();
JSFunction* toStringFunction = JSFunction::create(vm, globalObject, 0, vm.propertyNames->toString.string(), functionProtoFuncToString);
putDirectWithoutTransition(vm, vm.propertyNames->toString, toStringFunction, static_cast<unsigned>(PropertyAttribute::DontEnum));
*applyFunction = putDirectBuiltinFunctionWithoutTransition(vm, globalObject, vm.propertyNames->builtinNames().applyPublicName(), functionPrototypeApplyCodeGenerator(vm), static_cast<unsigned>(PropertyAttribute::DontEnum));
*callFunction = putDirectBuiltinFunctionWithoutTransition(vm, globalObject, vm.propertyNames->builtinNames().callPublicName(), functionPrototypeCallCodeGenerator(vm), static_cast<unsigned>(PropertyAttribute::DontEnum));
putDirectBuiltinFunctionWithoutTransition(vm, globalObject, vm.propertyNames->bind, functionPrototypeBindCodeGenerator(vm), static_cast<unsigned>(PropertyAttribute::DontEnum));
*hasInstanceSymbolFunction = JSFunction::create(vm, functionPrototypeSymbolHasInstanceCodeGenerator(vm), globalObject);
putDirectWithoutTransition(vm, vm.propertyNames->hasInstanceSymbol, *hasInstanceSymbolFunction, PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
}
void FunctionPrototype::initRestrictedProperties(ExecState* exec, JSGlobalObject* globalObject)
{
VM& vm = exec->vm();
GetterSetter* errorGetterSetter = globalObject->throwTypeErrorArgumentsCalleeAndCallerGetterSetter();
putDirectAccessor(exec, vm.propertyNames->caller, errorGetterSetter, PropertyAttribute::DontEnum | PropertyAttribute::Accessor);
putDirectAccessor(exec, vm.propertyNames->arguments, errorGetterSetter, PropertyAttribute::DontEnum | PropertyAttribute::Accessor);
}
EncodedJSValue JSC_HOST_CALL functionProtoFuncToString(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue thisValue = exec->thisValue();
if (thisValue.inherits<JSFunction>(vm)) {
JSFunction* function = jsCast<JSFunction*>(thisValue);
if (function->isHostOrBuiltinFunction())
RELEASE_AND_RETURN(scope, JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(vm), "() {\n [native code]\n}")));
FunctionExecutable* executable = function->jsExecutable();
if (executable->isClass())
return JSValue::encode(jsString(exec, executable->classSource().view().toString()));
String functionHeader;
switch (executable->parseMode()) {
case SourceParseMode::GeneratorWrapperFunctionMode:
case SourceParseMode::GeneratorWrapperMethodMode:
functionHeader = "function* ";
break;
case SourceParseMode::NormalFunctionMode:
case SourceParseMode::GetterMode:
case SourceParseMode::SetterMode:
case SourceParseMode::MethodMode:
case SourceParseMode::ProgramMode:
case SourceParseMode::ModuleAnalyzeMode:
case SourceParseMode::ModuleEvaluateMode:
case SourceParseMode::GeneratorBodyMode:
case SourceParseMode::AsyncGeneratorBodyMode:
case SourceParseMode::AsyncFunctionBodyMode:
case SourceParseMode::AsyncArrowFunctionBodyMode:
functionHeader = "function ";
break;
case SourceParseMode::ArrowFunctionMode:
functionHeader = "";
break;
case SourceParseMode::AsyncFunctionMode:
case SourceParseMode::AsyncMethodMode:
functionHeader = "async function ";
break;
case SourceParseMode::AsyncArrowFunctionMode:
functionHeader = "async ";
break;
case SourceParseMode::AsyncGeneratorWrapperFunctionMode:
case SourceParseMode::AsyncGeneratorWrapperMethodMode:
functionHeader = "async function* ";
break;
}
StringView source = executable->source().provider()->getRange(
executable->parametersStartOffset(),
executable->parametersStartOffset() + executable->source().length());
RELEASE_AND_RETURN(scope, JSValue::encode(jsMakeNontrivialString(exec, functionHeader, function->name(vm), source)));
}
if (thisValue.inherits<InternalFunction>(vm)) {
InternalFunction* function = jsCast<InternalFunction*>(thisValue);
RELEASE_AND_RETURN(scope, JSValue::encode(jsMakeNontrivialString(exec, "function ", function->name(), "() {\n [native code]\n}")));
}
if (thisValue.isObject()) {
JSObject* object = asObject(thisValue);
if (object->isFunction(vm))
RELEASE_AND_RETURN(scope, JSValue::encode(jsMakeNontrivialString(exec, "function ", object->classInfo(vm)->className, "() {\n [native code]\n}")));
}
return throwVMTypeError(exec, scope);
}
}