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QDBus: improve error handling, to give the developer feedback.

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For instance, exporting an object with a slot like
   QString complexMethod(const MyVariantMap& vars);
   (even with a simple typedef QVariantMap MyVariantMap)
used to silently skip that method in the introspection.
Now it outputs:
 generateInterfaceXml: Skipped method "complexMethod" : Invalid type in parameter list: MyVariantMap

Change-Id: I7964cfb63e973257ce1abe47b9625e361b2ad23f
Reviewed-by: Kevin Ottens <kevin.ottens@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
David Faure 2013-05-04 13:03:45 +02:00 committed by The Qt Project
parent 170469ef84
commit b2f9839457
6 changed files with 43 additions and 28 deletions
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11
src/dbus/qdbusabstractadaptor.cpp
View File

@ -298,15 +298,18 @@ void QDBusAdaptorConnector::relay(QObject *senderObj, int lastSignalIdx, void **
// break down the parameter list
QVector<int> types;
int inputCount = qDBusParametersForMethod(mm, types);
if (inputCount == -1)
QString errorMsg;
int inputCount = qDBusParametersForMethod(mm, types, errorMsg);
if (inputCount == -1) {
// invalid signal signature
// qDBusParametersForMethod has already complained
qWarning("QDBusAbstractAdaptor: Cannot relay signal %s::%s: %s",
senderMetaObject->className(), mm.methodSignature().constData(),
qPrintable(errorMsg));
return;
}
if (inputCount + 1 != types.count() ||
types.at(inputCount) == QDBusMetaTypeId::message()) {
// invalid signal signature
// qDBusParametersForMethod has not yet complained about this one
qWarning("QDBusAbstractAdaptor: Cannot relay signal %s::%s",
senderMetaObject->className(), mm.methodSignature().constData());
return;

4
src/dbus/qdbusconnection_p.h
View File

@ -342,9 +342,9 @@ public:
};
// in qdbusmisc.cpp
extern int qDBusParametersForMethod(const QMetaMethod &mm, QVector<int> &metaTypes);
extern int qDBusParametersForMethod(const QMetaMethod &mm, QVector<int> &metaTypes, QString &errorMsg);
#endif // QT_BOOTSTRAPPED
extern Q_DBUS_EXPORT int qDBusParametersForMethod(const QList<QByteArray> &parameters, QVector<int>& metaTypes);
extern Q_DBUS_EXPORT int qDBusParametersForMethod(const QList<QByteArray> &parameters, QVector<int>& metaTypes, QString &errorMsg);
extern Q_DBUS_EXPORT bool qDBusCheckAsyncTag(const char *tag);
#ifndef QT_BOOTSTRAPPED
extern bool qDBusInterfaceInObject(QObject *obj, const QString &interface_name);

6
src/dbus/qdbusintegrator.cpp
View File

@ -721,7 +721,8 @@ static int findSlot(const QMetaObject *mo, const QByteArray &name, int flags,
if (isAsync && returnType != QMetaType::Void)
continue;
int inputCount = qDBusParametersForMethod(mm, metaTypes);
QString errorMsg;
int inputCount = qDBusParametersForMethod(mm, metaTypes, errorMsg);
if (inputCount == -1)
continue; // problem parsing
@ -1312,7 +1313,8 @@ int QDBusConnectionPrivate::findSlot(QObject* obj, const QByteArray &normalizedN
if (midx == -1)
return -1;
int inputCount = qDBusParametersForMethod(obj->metaObject()->method(midx), params);
QString errorMsg;
int inputCount = qDBusParametersForMethod(obj->metaObject()->method(midx), params, errorMsg);
if ( inputCount == -1 || inputCount + 1 != params.count() )
return -1; // failed to parse or invalid arguments or output arguments

22
src/dbus/qdbusmisc.cpp
View File

@ -131,14 +131,14 @@ bool qDBusInterfaceInObject(QObject *obj, const QString &interface_name)
// metaTypes.count() >= retval + 1 in all cases
//
// sig must be the normalised signature for the method
int qDBusParametersForMethod(const QMetaMethod &mm, QVector<int> &metaTypes)
int qDBusParametersForMethod(const QMetaMethod &mm, QVector<int> &metaTypes, QString &errorMsg)
{
return qDBusParametersForMethod(mm.parameterTypes(), metaTypes);
return qDBusParametersForMethod(mm.parameterTypes(), metaTypes, errorMsg);
}
#endif // QT_BOOTSTRAPPED
int qDBusParametersForMethod(const QList<QByteArray> &parameterTypes, QVector<int>& metaTypes)
int qDBusParametersForMethod(const QList<QByteArray> &parameterTypes, QVector<int>& metaTypes, QString &errorMsg)
{
QDBusMetaTypeId::init();
metaTypes.clear();
@ -151,8 +151,7 @@ int qDBusParametersForMethod(const QList<QByteArray> &parameterTypes, QVector<in
for ( ; it != end; ++it) {
const QByteArray &type = *it;
if (type.endsWith('*')) {
//qWarning("Could not parse the method '%s'", mm.methodSignature().constData());
// pointer?
errorMsg = QLatin1String("Pointers are not supported: ") + QLatin1String(type);
return -1;
}
@ -162,8 +161,7 @@ int qDBusParametersForMethod(const QList<QByteArray> &parameterTypes, QVector<in
int id = QMetaType::type(basictype);
if (id == 0) {
//qWarning("Could not parse the method '%s'", mm.methodSignature().constData());
// invalid type in method parameter list
errorMsg = QLatin1String("Unregistered output type in parameter list: ") + QLatin1String(type);
return -1;
} else if (QDBusMetaType::typeToSignature(id) == 0)
return -1;
@ -174,22 +172,22 @@ int qDBusParametersForMethod(const QList<QByteArray> &parameterTypes, QVector<in
}
if (seenMessage) { // && !type.endsWith('&')
//qWarning("Could not parse the method '%s'", mm.methodSignature().constData());
// non-output parameters after message or after output params
errorMsg = QLatin1String("Invalid method, non-output parameters after message or after output parameters: ") + QLatin1String(type);
return -1; // not allowed
}
int id = QMetaType::type(type);
if (id == QMetaType::UnknownType) {
//qWarning("Could not parse the method '%s'", mm.methodSignature().constData());
// invalid type in method parameter list
errorMsg = QLatin1String("Unregistered input type in parameter list: ") + QLatin1String(type);
return -1;
}
if (id == QDBusMetaTypeId::message())
seenMessage = true;
else if (QDBusMetaType::typeToSignature(id) == 0)
else if (QDBusMetaType::typeToSignature(id) == 0) {
errorMsg = QLatin1String("Type not registered with QtDBus in parameter list: ") + QLatin1String(type);
return -1;
}
metaTypes.append(id);
++inputCount;

16
src/dbus/qdbusxmlgenerator.cpp
View File

@ -41,6 +41,7 @@
#include <QtCore/qmetaobject.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qdebug.h>
#include "qdbusinterface_p.h" // for ANNOTATION_NO_WAIT
#include "qdbusabstractadaptor_p.h" // for QCLASSINFO_DBUS_*
@ -159,17 +160,24 @@ static QString generateInterfaceXml(const QMetaObject *mo, int flags, int method
if (QDBusMetaType::signatureToType(typeName) == QVariant::Invalid)
xml += QString::fromLatin1(" <annotation name=\"org.qtproject.QtDBus.QtTypeName.Out0\" value=\"%1\"/>\n")
.arg(typeNameToXml(QMetaType::typeName(typeId)));
} else
} else {
qWarning() << "Unsupported return type" << typeId << QMetaType::typeName(typeId) << "in method" << mm.name();
continue;
}
else if (typeId == QMetaType::UnknownType)
}
else if (typeId == QMetaType::UnknownType) {
qWarning() << "Invalid return type in method" << mm.name();
continue; // wasn't a valid type
}
QList<QByteArray> names = mm.parameterNames();
QVector<int> types;
int inputCount = qDBusParametersForMethod(mm, types);
if (inputCount == -1)
QString errorMsg;
int inputCount = qDBusParametersForMethod(mm, types, errorMsg);
if (inputCount == -1) {
qWarning() << "Skipped method" << mm.name() << ":" << qPrintable(errorMsg);
continue; // invalid form
}
if (isSignal && inputCount + 1 != types.count())
continue; // signal with output arguments?
if (isSignal && types.at(inputCount) == QDBusMetaTypeId::message())

12
src/tools/qdbuscpp2xml/qdbuscpp2xml.cpp
View File

@ -47,6 +47,7 @@
#include <qbuffer.h>
#include <qregexp.h>
#include <qvector.h>
#include <qdebug.h>
#include <stdio.h>
#include <stdlib.h>
@ -95,14 +96,14 @@ static const char help[] =
"\n";
int qDBusParametersForMethod(const FunctionDef &mm, QVector<int>& metaTypes)
int qDBusParametersForMethod(const FunctionDef &mm, QVector<int>& metaTypes, QString &errorMsg)
{
QList<QByteArray> parameterTypes;
foreach (const ArgumentDef &arg, mm.arguments)
parameterTypes.append(arg.normalizedType);
return qDBusParametersForMethod(parameterTypes, metaTypes);
return qDBusParametersForMethod(parameterTypes, metaTypes, errorMsg);
}
@ -140,9 +141,12 @@ static QString addFunction(const FunctionDef &mm, bool isSignal = false) {
}
QList<ArgumentDef> names = mm.arguments;
QVector<int> types;
int inputCount = qDBusParametersForMethod(mm, types);
if (inputCount == -1)
QString errorMsg;
int inputCount = qDBusParametersForMethod(mm, types, errorMsg);
if (inputCount == -1) {
qWarning() << qPrintable(errorMsg);
return QString(); // invalid form
}
if (isSignal && inputCount + 1 != types.count())
return QString(); // signal with output arguments?
if (isSignal && types.at(inputCount) == QDBusMetaTypeId::message())