qv4errorobject.cpp

Go to the documentation of this file.

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 
#include "qv4errorobject_p.h"
#include <QtCore/qnumeric.h>
#include <QtCore/qmath.h>
#include <QtCore/QDateTime>
#include <QtCore/QStringList>
#include <QtCore/QDebug>
 
#include <private/qv4mm_p.h>
#include <private/qv4codegen_p.h>
 
#ifndef Q_OS_WIN
#  include <time.h>
#  ifndef Q_OS_VXWORKS
#    include <sys/time.h>
#  else
#    include "qplatformdefs.h"
#  endif
#else
#  include <qt_windows.h>
#endif
 
using namespace QV4;
 
void Heap::ErrorObject::init()
{
    Object::init();
    stackTrace = nullptr;
 
    Scope scope(internalClass->engine);
    Scoped<QV4::ErrorObject> e(scope, this);
 
    if (internalClass == scope.engine->internalClasses(EngineBase::Class_ErrorProto))
        return;
 
    setProperty(scope.engine, QV4::ErrorObject::Index_Stack, scope.engine->getStackFunction()->d());
    setProperty(scope.engine, QV4::ErrorObject::Index_StackSetter, Value::undefinedValue());
    setProperty(scope.engine, QV4::ErrorObject::Index_FileName, Value::undefinedValue());
    setProperty(scope.engine, QV4::ErrorObject::Index_LineNumber, Value::undefinedValue());
}
 
void Heap::ErrorObject::init(const Value &message, ErrorType t)
{
    Object::init();
    errorType = t;
 
    Scope scope(internalClass->engine);
    Scoped<QV4::ErrorObject> e(scope, this);
 
    setProperty(scope.engine, QV4::ErrorObject::Index_Stack, scope.engine->getStackFunction()->d());
    setProperty(scope.engine, QV4::ErrorObject::Index_StackSetter, Value::undefinedValue());
 
    e->d()->stackTrace = new StackTrace(scope.engine->stackTrace());
    if (!e->d()->stackTrace->isEmpty()) {
        setProperty(scope.engine, QV4::ErrorObject::Index_FileName, scope.engine->newString(e->d()->stackTrace->at(0).source));
        setProperty(scope.engine, QV4::ErrorObject::Index_LineNumber, Value::fromInt32(qAbs(e->d()->stackTrace->at(0).line)));
    }
 
    if (!message.isUndefined())
        setProperty(scope.engine, QV4::ErrorObject::Index_Message, message);
}
 
void Heap::ErrorObject::init(const Value &message, const QString &fileName, int line, int column, ErrorObject::ErrorType t)
{
    Q_UNUSED(fileName); // ####
    Object::init();
    errorType = t;
 
    Scope scope(internalClass->engine);
    Scoped<QV4::ErrorObject> e(scope, this);
 
    setProperty(scope.engine, QV4::ErrorObject::Index_Stack, scope.engine->getStackFunction()->d());
    setProperty(scope.engine, QV4::ErrorObject::Index_StackSetter, Value::undefinedValue());
 
    e->d()->stackTrace = new StackTrace(scope.engine->stackTrace());
    StackFrame frame;
    frame.source = fileName;
    frame.line = line;
    frame.column = column;
    e->d()->stackTrace->prepend(frame);
 
    Q_ASSERT(!e->d()->stackTrace->isEmpty());
    setProperty(scope.engine, QV4::ErrorObject::Index_FileName, scope.engine->newString(e->d()->stackTrace->at(0).source));
    setProperty(scope.engine, QV4::ErrorObject::Index_LineNumber, Value::fromInt32(qAbs(e->d()->stackTrace->at(0).line)));
 
    if (!message.isUndefined())
        setProperty(scope.engine, QV4::ErrorObject::Index_Message, message);
}
 
const char *ErrorObject::className(Heap::ErrorObject::ErrorType t)
{
    switch (t) {
    case Heap::ErrorObject::Error:
        return "Error";
    case Heap::ErrorObject::EvalError:
        return "EvalError";
    case Heap::ErrorObject::RangeError:
        return "RangeError";
    case Heap::ErrorObject::ReferenceError:
        return "ReferenceError";
    case Heap::ErrorObject::SyntaxError:
        return "SyntaxError";
    case Heap::ErrorObject::TypeError:
        return "TypeError";
    case Heap::ErrorObject::URIError:
        return "URIError";
    }
    Q_UNREACHABLE();
}
 
ReturnedValue ErrorObject::method_get_stack(const FunctionObject *b, const Value *thisObject, const Value *, int)
{
    ExecutionEngine *v4 = b->engine();
    const ErrorObject *This = thisObject->as<ErrorObject>();
    if (!This)
        return v4->throwTypeError();
    if (!This->d()->stack) {
        QString trace;
        for (int i = 0; i < This->d()->stackTrace->size(); ++i) {
            if (i > 0)
                trace += QLatin1Char('\n');
            const StackFrame &frame = This->d()->stackTrace->at(i);
            trace += frame.function + QLatin1Char('@') + frame.source;
            if (frame.line >= 0)
                trace += QLatin1Char(':') + QString::number(frame.line);
        }
        This->d()->stack.set(v4, v4->newString(trace));
    }
    return This->d()->stack->asReturnedValue();
}
 
DEFINE_OBJECT_VTABLE(ErrorObject);
 
void Heap::SyntaxErrorObject::init(const Value &msg)
{
    Heap::ErrorObject::init(msg, SyntaxError);
}
 
void Heap::SyntaxErrorObject::init(const Value &msg, const QString &fileName, int lineNumber, int columnNumber)
{
    Heap::ErrorObject::init(msg, fileName, lineNumber, columnNumber, SyntaxError);
}
 
void Heap::EvalErrorObject::init(const Value &message)
{
    Heap::ErrorObject::init(message, EvalError);
}
 
void Heap::RangeErrorObject::init(const Value &message)
{
    Heap::ErrorObject::init(message, RangeError);
}
 
void Heap::ReferenceErrorObject::init(const Value &message)
{
    Heap::ErrorObject::init(message, ReferenceError);
}
 
void Heap::ReferenceErrorObject::init(const Value &msg, const QString &fileName, int lineNumber, int columnNumber)
{
    Heap::ErrorObject::init(msg, fileName, lineNumber, columnNumber, ReferenceError);
}
 
void Heap::TypeErrorObject::init(const Value &message)
{
    Heap::ErrorObject::init(message, TypeError);
}
 
void Heap::URIErrorObject::init(const Value &message)
{
    Heap::ErrorObject::init(message, URIError);
}
 
DEFINE_OBJECT_VTABLE(ErrorCtor);
DEFINE_OBJECT_VTABLE(EvalErrorCtor);
DEFINE_OBJECT_VTABLE(RangeErrorCtor);
DEFINE_OBJECT_VTABLE(ReferenceErrorCtor);
DEFINE_OBJECT_VTABLE(SyntaxErrorCtor);
DEFINE_OBJECT_VTABLE(TypeErrorCtor);
DEFINE_OBJECT_VTABLE(URIErrorCtor);
 
void Heap::ErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("Error"));
}
 
void Heap::ErrorCtor::init(QV4::ExecutionEngine *engine, const QString &name)
{
    Heap::FunctionObject::init(engine, name);
}
 
ReturnedValue ErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<ErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
ReturnedValue ErrorCtor::virtualCall(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
    return f->callAsConstructor(argv, argc);
}
 
void Heap::EvalErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("EvalError"));
}
 
ReturnedValue EvalErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<EvalErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void Heap::RangeErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("RangeError"));
}
 
ReturnedValue RangeErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<RangeErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void Heap::ReferenceErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("ReferenceError"));
}
 
ReturnedValue ReferenceErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<ReferenceErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void Heap::SyntaxErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("SyntaxError"));
}
 
ReturnedValue SyntaxErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<SyntaxErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void Heap::TypeErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("TypeError"));
}
 
ReturnedValue TypeErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<TypeErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void Heap::URIErrorCtor::init(QV4::ExecutionEngine *engine)
{
    Heap::FunctionObject::init(engine, QStringLiteral("URIError"));
}
 
ReturnedValue URIErrorCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *argv, int argc, const Value *newTarget)
{
    Value v = argc ? *argv : Value::undefinedValue();
    return ErrorObject::create<URIErrorObject>(f->engine(), v, newTarget)->asReturnedValue();
}
 
void ErrorPrototype::init(ExecutionEngine *engine, Object *ctor, Object *obj, Heap::ErrorObject::ErrorType t)
{
    Scope scope(engine);
    ScopedString s(scope);
    ScopedObject o(scope);
    ctor->defineReadonlyProperty(engine->id_prototype(), (o = obj));
    ctor->defineReadonlyConfigurableProperty(engine->id_length(), Value::fromInt32(1));
    obj->setProperty(Index_Constructor, ctor->d());
    obj->setProperty(Index_Message, engine->id_empty()->d());
    obj->setProperty(Index_Name, engine->newString(QString::fromLatin1(ErrorObject::className(t))));
    obj->defineDefaultProperty(engine->id_toString(), method_toString, 0);
}
 
ReturnedValue ErrorPrototype::method_toString(const FunctionObject *b, const Value *thisObject, const Value *, int)
{
    ExecutionEngine *v4 = b->engine();
    const Object *o = thisObject->as<Object>();
    if (!o)
        return v4->throwTypeError();
 
    Scope scope(v4);
    ScopedValue name(scope, o->get(scope.engine->id_name()));
    QString qname;
    if (name->isUndefined())
        qname = QStringLiteral("Error");
    else
        qname = name->toQString();
 
    ScopedString s(scope, scope.engine->newString(QStringLiteral("message")));
    ScopedValue message(scope, o->get(s));
    QString qmessage;
    if (!message->isUndefined())
        qmessage = message->toQString();
 
    QString str;
    if (qname.isEmpty()) {
        str = qmessage;
    } else if (qmessage.isEmpty()) {
        str = qname;
    } else {
        str = qname + QLatin1String(": ") + qmessage;
    }
 
    return scope.engine->newString(str)->asReturnedValue();
}