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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003-2017 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "ErrorConstructor.h"
#include "ErrorPrototype.h"
#include "JSCInlines.h"
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(ErrorConstructor);
const ClassInfo ErrorConstructor::s_info = { "Function"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(ErrorConstructor) };
static JSC_DECLARE_HOST_FUNCTION(callErrorConstructor);
static JSC_DECLARE_HOST_FUNCTION(constructErrorConstructor);
static JSC_DECLARE_HOST_FUNCTION(errorConstructorCaptureStackTrace);
static JSC_DECLARE_HOST_FUNCTION(errorConstructorIsError);
ErrorConstructor::ErrorConstructor(VM& vm, Structure* structure)
: InternalFunction(vm, structure, callErrorConstructor, constructErrorConstructor)
{
}
void ErrorConstructor::finishCreation(VM& vm, ErrorPrototype* errorPrototype)
{
JSGlobalObject* globalObject = errorPrototype->globalObject();
Base::finishCreation(vm, 1, vm.propertyNames->Error.string(), PropertyAdditionMode::WithoutStructureTransition);
// ECMA 15.11.3.1 Error.prototype
putDirectWithoutTransition(vm, vm.propertyNames->prototype, errorPrototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->stackTraceLimit, jsNumber(globalObject->stackTraceLimit().value_or(Options::defaultErrorStackTraceLimit())), static_cast<unsigned>(PropertyAttribute::None));
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->captureStackTrace, errorConstructorCaptureStackTrace, static_cast<unsigned>(PropertyAttribute::DontEnum), 0, ImplementationVisibility::Public);
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION("isError"_s, errorConstructorIsError, static_cast<unsigned>(PropertyAttribute::DontEnum), 1, ImplementationVisibility::Public);
}
// ECMA 15.9.3
JSC_DEFINE_HOST_FUNCTION(constructErrorConstructor, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue message = callFrame->argument(0);
JSValue options = callFrame->argument(1);
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* errorStructure = JSC_GET_DERIVED_STRUCTURE(vm, errorStructure, newTarget, callFrame->jsCallee());
RETURN_IF_EXCEPTION(scope, { });
RELEASE_AND_RETURN(scope, JSValue::encode(ErrorInstance::create(globalObject, errorStructure, message, options, nullptr, TypeNothing, ErrorType::Error, false)));
}
JSC_DEFINE_HOST_FUNCTION(callErrorConstructor, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
JSValue message = callFrame->argument(0);
JSValue options = callFrame->argument(1);
Structure* errorStructure = globalObject->errorStructure();
return JSValue::encode(ErrorInstance::create(globalObject, errorStructure, message, options, nullptr, TypeNothing, ErrorType::Error, false));
}
bool ErrorConstructor::put(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
VM& vm = globalObject->vm();
ErrorConstructor* thisObject = jsCast<ErrorConstructor*>(cell);
if (propertyName == vm.propertyNames->stackTraceLimit) {
if (value.isNumber()) {
double effectiveLimit = value.asNumber();
effectiveLimit = std::max(0., effectiveLimit);
effectiveLimit = std::min(effectiveLimit, static_cast<double>(std::numeric_limits<unsigned>::max()));
thisObject->globalObject()->setStackTraceLimit(static_cast<unsigned>(effectiveLimit));
} else
thisObject->globalObject()->setStackTraceLimit(std::nullopt);
}
return Base::put(thisObject, globalObject, propertyName, value, slot);
}
bool ErrorConstructor::deleteProperty(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, DeletePropertySlot& slot)
{
VM& vm = globalObject->vm();
ErrorConstructor* thisObject = jsCast<ErrorConstructor*>(cell);
if (propertyName == vm.propertyNames->stackTraceLimit)
thisObject->globalObject()->setStackTraceLimit(std::nullopt);
return Base::deleteProperty(thisObject, globalObject, propertyName, slot);
}
JSC_DEFINE_HOST_FUNCTION(errorConstructorCaptureStackTrace, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (!callFrame->argument(0).isObject()) {
throwTypeError(globalObject, scope, "captureStackTrace expects the first argument to be an object"_s);
return { };
}
JSObject* object = callFrame->argument(0).getObject();
JSValue callerArg = callFrame->argument(1);
JSCell* caller = callerArg.isCallable() ? callerArg.asCell() : nullptr;
Vector<StackFrame> stackTrace;
// skip this function.
const size_t framesToSkip = 1;
vm.interpreter.getStackTrace(object, stackTrace, framesToSkip, globalObject->stackTraceLimit().value_or(0), caller);
object->putDirect(vm, vm.propertyNames->stack, jsString(vm, Interpreter::stackTraceAsString(vm, stackTrace)), static_cast<unsigned>(PropertyAttribute::DontEnum));
return encodedJSUndefined();
}
JSC_DEFINE_HOST_FUNCTION(errorConstructorIsError, (JSGlobalObject*, CallFrame* callFrame))
{
JSObject* object = jsDynamicCast<JSObject*>(callFrame->argument(0));
return JSValue::encode(jsBoolean(object && object->isErrorInstance()));
}
} // namespace JSC
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