Merge branch 'master' of git@scm.dev.nokia.troll.no:qt/qt-s60-public

1 files changed, 208 insertions, 127 deletions

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 5247290..040efc9 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -41,6 +41,7 @@
 
 #include "qobject.h"
 #include "qobject_p.h"
+#include "qmetaobject_p.h"
 
 #include "qabstracteventdispatcher.h"
 #include "qcoreapplication.h"
@@ -222,12 +223,42 @@ void QObjectPrivate::removePendingChildInsertedEvents(QObject *child)
 #endif
 
 
+/*!\internal
+  For a given metaobject, compute the signal offset, and the method offset (including signals)
+*/
+static void computeOffsets(const QMetaObject *metaobject, int *signalOffset, int *methodOffset)
+{
+    *signalOffset = *methodOffset = 0;
+    const QMetaObject *m = metaobject->d.superdata;
+    while (m) {
+        const QMetaObjectPrivate *d = QMetaObjectPrivate::get(m);
+        *methodOffset += d->methodCount;
+        *signalOffset += (d->revision >= 4) ? d->signalCount : d->methodCount;
+        /*Before Qt 4.6 (revision 4), the signalCount information was not generated by moc.
+           so for compatibility we consider all the method as slot for old moc output*/
+        m = m->d.superdata;
+    }
+}
+
+/*! \internal
+    This vector contains the all connections from an object.
+
+    Each object may have one vector containing the lists of connections for a given signal.
+    The index in the vector correspond to the signal index.
+    The signal index is the one returned by QObjectPrivate::signalIndex (not QMetaObject::indexOfSignal).
+    Negative index means connections to all signals.
+
+    This vector is protected by the object mutex (signalSlotMutexes())
+
+    Each Connection is also part of a 'senders' linked list. The mutex of the receiver must be locked when touching
+    the pointers of this linked list.
+*/
 class QObjectConnectionListVector : public QVector<QObjectPrivate::ConnectionList>
 {
 public:
-    bool orphaned;
-    bool dirty;
-    int inUse;
+    bool orphaned; //the QObject owner of this vector has been destroyed while the vector was inUse
+    bool dirty; //some Connection have been disconnected (their receiver is 0) but not removed from the list yet
+    int inUse; //number of functions that are currently accessing this object or its connections
     QObjectPrivate::ConnectionList allsignals;
 
     QObjectConnectionListVector()
@@ -252,7 +283,7 @@ public:
 bool QObjectPrivate::isSender(const QObject *receiver, const char *signal) const
 {
     Q_Q(const QObject);
-    int signal_index = q->metaObject()->indexOfSignal(signal);
+    int signal_index = signalIndex(signal);
     if (signal_index < 0)
         return false;
     QMutexLocker locker(signalSlotLock(q));
@@ -276,7 +307,7 @@ QObjectList QObjectPrivate::receiverList(const char *signal) const
 {
     Q_Q(const QObject);
     QObjectList returnValue;
-    int signal_index = q->metaObject()->indexOfSignal(signal);
+    int signal_index = signalIndex(signal);
     if (signal_index < 0)
         return returnValue;
     QMutexLocker locker(signalSlotLock(q));
@@ -2465,6 +2496,7 @@ QObject *QObject::sender() const
 
 int QObject::receivers(const char *signal) const
 {
+    Q_D(const QObject);
     int receivers = 0;
     if (signal) {
         QByteArray signal_name = QMetaObject::normalizedSignature(signal);
@@ -2474,8 +2506,7 @@ int QObject::receivers(const char *signal) const
             return 0;
 #endif
         signal++; // skip code
-        const QMetaObject *smeta = this->metaObject();
-        int signal_index = smeta->indexOfSignal(signal);
+        int signal_index = d->signalIndex(signal);
         if (signal_index < 0) {
 #ifndef QT_NO_DEBUG
             err_method_notfound(this, signal-1, "receivers");
@@ -2599,19 +2630,26 @@ bool QObject::connect(const QObject *sender, const char *signal,
     const QMetaObject *smeta = sender->metaObject();
     const char *signal_arg = signal;
     ++signal; //skip code
-    int signal_index = smeta->indexOfSignal(signal);
+    int signal_index = QMetaObjectPrivate::indexOfSignalRelative(&smeta, signal);
     if (signal_index < 0) {
         // check for normalized signatures
         tmp_signal_name = QMetaObject::normalizedSignature(signal - 1);
         signal = tmp_signal_name.constData() + 1;
 
-        signal_index = smeta->indexOfSignal(signal);
+        smeta = sender->metaObject();
+        signal_index = QMetaObjectPrivate::indexOfSignalRelative(&smeta, signal);
+
         if (signal_index < 0) {
             err_method_notfound(sender, signal_arg, "connect");
             err_info_about_objects("connect", sender, receiver);
             return false;
         }
     }
+    signal_index = QMetaObjectPrivate::originalClone(smeta, signal_index);
+    int signalOffset, methodOffset;
+    computeOffsets(smeta, &signalOffset, &methodOffset);
+    int signal_absolute_index = signal_index + methodOffset;
+    signal_index += signalOffset;
 
     QByteArray tmp_method_name;
     int membcode = extract_code(method);
@@ -2660,12 +2698,12 @@ bool QObject::connect(const QObject *sender, const char *signal,
 
     int *types = 0;
     if ((type == Qt::QueuedConnection || type == Qt::BlockingQueuedConnection)
-            && !(types = queuedConnectionTypes(smeta->method(signal_index).parameterTypes())))
+            && !(types = queuedConnectionTypes(smeta->method(signal_absolute_index).parameterTypes())))
         return false;
 
 #ifndef QT_NO_DEBUG
     {
-        QMetaMethod smethod = smeta->method(signal_index);
+        QMetaMethod smethod = smeta->method(signal_absolute_index);
         QMetaMethod rmethod = rmeta->method(method_index);
         if (warnCompat) {
             if(smethod.attributes() & QMetaMethod::Compatibility) {
@@ -2678,7 +2716,7 @@ bool QObject::connect(const QObject *sender, const char *signal,
         }
     }
 #endif
-    if (!QMetaObject::connect(sender, signal_index, receiver, method_index, type, types))
+    if (!QMetaObjectPrivate::connect(sender, signal_index, receiver, method_index, type, types))
         return false;
     const_cast<QObject*>(sender)->connectNotify(signal - 1);
     return true;
@@ -2822,14 +2860,18 @@ bool QObject::disconnect(const QObject *sender, const char *signal,
     do {
         int signal_index = -1;
         if (signal) {
-            signal_index = smeta->indexOfSignal(signal);
-            if (signal_index < smeta->methodOffset())
-                continue;
+            signal_index = QMetaObjectPrivate::indexOfSignalRelative(&smeta, signal);
+            if (signal_index < 0)
+                break;
+            signal_index = QMetaObjectPrivate::originalClone(smeta, signal_index);
+            int signalOffset, methodOffset;
+            computeOffsets(smeta, &signalOffset, &methodOffset);
+            signal_index += signalOffset;
             signal_found = true;
         }
 
         if (!method) {
-            res |= QMetaObject::disconnect(sender, signal_index, receiver, -1);
+            res |= QMetaObjectPrivate::disconnect(sender, signal_index, receiver, -1);
         } else {
             const QMetaObject *rmeta = receiver->metaObject();
             do {
@@ -2839,7 +2881,7 @@ bool QObject::disconnect(const QObject *sender, const char *signal,
                             rmeta = rmeta->superClass();
                 if (method_index < 0)
                     break;
-                res |= QMetaObject::disconnect(sender, signal_index, receiver, method_index);
+                res |= QMetaObjectPrivate::disconnect(sender, signal_index, receiver, method_index);
                 method_found = true;
             } while ((rmeta = rmeta->superClass()));
         }
@@ -2930,16 +2972,31 @@ void QObject::disconnectNotify(const char *)
 }
 
 /*!\internal
+   \a types is a 0-terminated vector of meta types for queued
+   connections.
 
-  \a types is a 0-terminated vector of meta types for queued
-  connections.
-
-  if \a signal_index is -1, then we effectively connect *all* signals
-  from the sender to the receiver's slot
-*/
+   if \a signal_index is -1, then we effectively connect *all* signals
+   from the sender to the receiver's slot
+ */
 bool QMetaObject::connect(const QObject *sender, int signal_index,
                           const QObject *receiver, int method_index, int type, int *types)
 {
+    const QMetaObject *mo = sender->metaObject();
+    while (mo && mo->methodOffset() > signal_index)
+        mo = mo->superClass();
+    int signalOffset, methodOffset;
+    computeOffsets(mo, &signalOffset, &methodOffset);
+    signal_index = QMetaObjectPrivate::originalClone(mo, signal_index - methodOffset) + signalOffset;
+    return QMetaObjectPrivate::connect(sender, signal_index,
+                                       receiver, method_index, type, types);
+}
+
+/*! \internal
+   Same as the QMetaObject::connect, but \a signal_index must be the result of QObjectPrivate::signalIndex
+ */
+bool QMetaObjectPrivate::connect(const QObject *sender, int signal_index,
+                                 const QObject *receiver, int method_index, int type, int *types)
+{
     QObject *s = const_cast<QObject *>(sender);
     QObject *r = const_cast<QObject *>(receiver);
 
@@ -2947,7 +3004,7 @@ bool QMetaObject::connect(const QObject *sender, int signal_index,
                                signalSlotLock(receiver));
 
     if (type & Qt::UniqueConnection) {
-        QObjectConnectionListVector *connectionLists = s->d_func()->connectionLists;
+        QObjectConnectionListVector *connectionLists = QObjectPrivate::get(s)->connectionLists;
         if (connectionLists && connectionLists->count() > signal_index) {
             const QObjectPrivate::Connection *c2 = 
                 (*connectionLists)[signal_index].first;
@@ -2970,29 +3027,29 @@ bool QMetaObject::connect(const QObject *sender, int signal_index,
     c->nextConnectionList = 0;
 
     QT_TRY {
-        s->d_func()->addConnection(signal_index, c);
+        QObjectPrivate::get(s)->addConnection(signal_index, c);
     } QT_CATCH(...) {
         delete c;
         QT_RETHROW;
     }
 
-    c->prev = &r->d_func()->senders;
+    c->prev = &(QObjectPrivate::get(r)->senders);
     c->next = *c->prev;
     *c->prev = c;
     if (c->next)
         c->next->prev = &c->next;
 
+    QObjectPrivate *const sender_d = QObjectPrivate::get(s);
     if (signal_index < 0) {
-        for (uint i = 0; i < (sizeof sender->d_func()->connectedSignals
-                              / sizeof sender->d_func()->connectedSignals[0] ); ++i)
-            sender->d_func()->connectedSignals[i] = ~0u;
-    } else if (signal_index < (int)sizeof sender->d_func()->connectedSignals * 8) {
-        uint n = (signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        sender->d_func()->connectedSignals[n] |= (1 << (signal_index - n * 8
-                                                        * sizeof sender->d_func()->connectedSignals[0]));
+        for (uint i = 0; i < (sizeof sender_d->connectedSignals
+                              / sizeof sender_d->connectedSignals[0] ); ++i)
+            sender_d->connectedSignals[i] = ~0u;
+    } else if (signal_index < (int)sizeof sender_d->connectedSignals * 8) {
+        uint n = (signal_index / (8 * sizeof sender_d->connectedSignals[0]));
+        sender_d->connectedSignals[n] |= (1 << (signal_index - n * 8
+                                    * sizeof sender_d->connectedSignals[0]));
     }
 
-
     return true;
 }
 
@@ -3002,6 +3059,22 @@ bool QMetaObject::connect(const QObject *sender, int signal_index,
 bool QMetaObject::disconnect(const QObject *sender, int signal_index,
                              const QObject *receiver, int method_index)
 {
+    const QMetaObject *mo = sender->metaObject();
+    while (mo && mo->methodOffset() > signal_index)
+        mo = mo->superClass();
+    int signalOffset, methodOffset;
+    computeOffsets(mo, &signalOffset, &methodOffset);
+    signal_index = QMetaObjectPrivate::originalClone(mo, signal_index - methodOffset) + signalOffset;
+    return QMetaObjectPrivate::disconnect(sender, signal_index,
+                                          receiver, method_index);
+}
+
+/*! \internal
+    Same as the QMetaObject::disconnect, but \a signal_index must be the result of QObjectPrivate::signalIndex
+ */
+bool QMetaObjectPrivate::disconnect(const QObject *sender, int signal_index,
+                             const QObject *receiver, int method_index)
+{
     if (!sender)
         return false;
 
@@ -3012,7 +3085,7 @@ bool QMetaObject::disconnect(const QObject *sender, int signal_index,
     QMutex *receiverMutex = receiver ? signalSlotLock(receiver) : 0;
     QOrderedMutexLocker locker(senderMutex, receiverMutex);
 
-    QObjectConnectionListVector *connectionLists = s->d_func()->connectionLists;
+    QObjectConnectionListVector *connectionLists = QObjectPrivate::get(s)->connectionLists;
     if (!connectionLists)
         return false;
 
@@ -3123,23 +3196,26 @@ void QMetaObject::connectSlotsByName(QObject *o)
             int len = objName.length();
             if (!len || qstrncmp(slot + 3, objName.data(), len) || slot[len+3] != '_')
                 continue;
-            const QMetaObject *smo = co->metaObject();
-            int sigIndex = smo->indexOfMethod(slot + len + 4);
+            int sigIndex = co->d_func()->signalIndex(slot + len + 4);
             if (sigIndex < 0) { // search for compatible signals
+                const QMetaObject *smo = co->metaObject();
                 int slotlen = qstrlen(slot + len + 4) - 1;
                 for (int k = 0; k < co->metaObject()->methodCount(); ++k) {
-                    if (smo->method(k).methodType() != QMetaMethod::Signal)
+                    QMetaMethod method = smo->method(k);
+                    if (method.methodType() != QMetaMethod::Signal)
                         continue;
 
-                    if (!qstrncmp(smo->method(k).signature(), slot + len + 4, slotlen)) {
-                        sigIndex = k;
+                    if (!qstrncmp(method.signature(), slot + len + 4, slotlen)) {
+                        int signalOffset, methodOffset;
+                        computeOffsets(method.enclosingMetaObject(), &signalOffset, &methodOffset);
+                        sigIndex = k + - methodOffset + signalOffset;
                         break;
                     }
                 }
             }
             if (sigIndex < 0)
                 continue;
-            if (QMetaObject::connect(co, sigIndex, o, i)) {
+            if (QMetaObjectPrivate::connect(co, sigIndex, o, i)) {
                 foundIt = true;
                 break;
             }
@@ -3211,15 +3287,43 @@ static void blocking_activate(QObject *sender, int signal, QObjectPrivate::Conne
 }
 
 /*!\internal
+   \obsolete.
+   Used to be called from QMetaObject::activate(QObject *, QMetaObject *, int, int, void **) before Qt 4.6
  */
 void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal_index, void **argv)
 {
+    Q_UNUSED(to_signal_index);
+    activate(sender, from_signal_index, argv);
+}
+
+/*!\internal
+ */
+void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_signal_index,
+                           void **argv)
+{
+    int signalOffset;
+    int methodOffset;
+    computeOffsets(m, &signalOffset, &methodOffset);
+
+    int signal_index = signalOffset + local_signal_index;
+    if (signal_index < (int)sizeof(sender->d_func()->connectedSignals) * 8
+        && !qt_signal_spy_callback_set.signal_begin_callback
+        && !qt_signal_spy_callback_set.signal_end_callback) {
+        uint n = (signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
+        uint m = 1 << (signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
+        if ((sender->d_func()->connectedSignals[n] & m) == 0)
+            // nothing connected to these signals, and no spy
+            return;
+    }
+
     if (sender->d_func()->blockSig)
         return;
 
+    int signal_absolute_index = methodOffset + local_signal_index;
+
     void *empty_argv[] = { 0 };
     if (qt_signal_spy_callback_set.signal_begin_callback != 0) {
-        qt_signal_spy_callback_set.signal_begin_callback(sender, from_signal_index,
+        qt_signal_spy_callback_set.signal_begin_callback(sender, signal_absolute_index,
                                                          argv ? argv : empty_argv);
     }
 
@@ -3229,26 +3333,20 @@ void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal
     QObjectConnectionListVector *connectionLists = sender->d_func()->connectionLists;
     if (!connectionLists) {
         if (qt_signal_spy_callback_set.signal_end_callback != 0)
-            qt_signal_spy_callback_set.signal_end_callback(sender, from_signal_index);
+            qt_signal_spy_callback_set.signal_end_callback(sender, signal_absolute_index);
         return;
     }
     ++connectionLists->inUse;
+    if (signal_index >= connectionLists->count()) {
+        signal_index = -2; //for "all signals";
+    }
 
-    // emit signals in the following order: from_signal_index <= signals <= to_signal_index, signal < 0
-    for (int signal = from_signal_index;
-         (signal >= from_signal_index && signal <= to_signal_index) || (signal == -2);
-         (signal == to_signal_index ? signal = -2 : ++signal))
-    {
-        if (signal >= connectionLists->count()) {
-            signal = to_signal_index;
-            continue;
-        }
-        
-        QObjectPrivate::Connection *c = connectionLists->at(signal).first;
+    do {
+        QObjectPrivate::Connection *c = connectionLists->at(signal_index).first;
         if (!c) continue;
         // We need to check against last here to ensure that signals added
         // during the signal emission are not emitted in this emission.
-        QObjectPrivate::Connection *last = connectionLists->at(signal).last;
+        QObjectPrivate::Connection *last = connectionLists->at(signal_index).last;
 
         do {
             if (!c->receiver)
@@ -3262,17 +3360,17 @@ void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal
                  && (currentThreadData != sender->d_func()->threadData
                      || receiver->d_func()->threadData != sender->d_func()->threadData))
                 || (c->connectionType == Qt::QueuedConnection)) {
-                queued_activate(sender, signal, c, argv);
+                queued_activate(sender, signal_absolute_index, c, argv);
                 continue;
             } else if (c->connectionType == Qt::BlockingQueuedConnection) {
-                blocking_activate(sender, signal, c, argv);
+                blocking_activate(sender, signal_absolute_index, c, argv);
                 continue;
             }
 
             const int method = c->method;
             QObjectPrivate::Sender currentSender;
             currentSender.sender = sender;
-            currentSender.signal = signal < 0 ? from_signal_index : signal;
+            currentSender.signal = signal_absolute_index;
             currentSender.ref = 1;
             QObjectPrivate::Sender *previousSender = 0;
             if (currentThreadData == receiver->d_func()->threadData)
@@ -3316,7 +3414,7 @@ void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal
 
         if (connectionLists->orphaned)
             break;
-    }
+    } while (signal_index >= 0 && (signal_index = -1)); //start over for -1 (all signal)
 
     --connectionLists->inUse;
     Q_ASSERT(connectionLists->inUse >= 0);
@@ -3330,82 +3428,50 @@ void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal
     locker.unlock();
 
     if (qt_signal_spy_callback_set.signal_end_callback != 0)
-        qt_signal_spy_callback_set.signal_end_callback(sender, from_signal_index);
-}
+        qt_signal_spy_callback_set.signal_end_callback(sender, signal_absolute_index);
 
+}
 
 /*!\internal
- */
+   Obsolete.  (signal_index comes from indexOfMethod())
+*/
 void QMetaObject::activate(QObject *sender, int signal_index, void **argv)
 {
-    if (signal_index < (int)sizeof(sender->d_func()->connectedSignals) * 8
-        && !qt_signal_spy_callback_set.signal_begin_callback
-        && !qt_signal_spy_callback_set.signal_end_callback) {
-        uint n = (signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        uint m = 1 << (signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
-        if ((sender->d_func()->connectedSignals[n] & m) == 0)
-            // nothing connected to these signals, and no spy
-            return;
-    }
-    activate(sender, signal_index, signal_index, argv);
-}
-
-/*!\internal
- */
-void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_signal_index,
-                           void **argv)
-{
-    int signal_index = m->methodOffset() + local_signal_index;
-    if (signal_index < (int)sizeof(sender->d_func()->connectedSignals) * 8
-        && !qt_signal_spy_callback_set.signal_begin_callback
-        && !qt_signal_spy_callback_set.signal_end_callback) {
-        uint n = (signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        uint m = 1 << (signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
-        if ((sender->d_func()->connectedSignals[n] & m) == 0)
-            // nothing connected to these signals, and no spy
-            return;
-    }
-    activate(sender, signal_index, signal_index, argv);
+    const QMetaObject *mo = sender->metaObject();
+    while (mo && mo->methodOffset() > signal_index)
+        mo = mo->superClass();
+    activate(sender, mo, signal_index - mo->methodOffset(), argv);
 }
 
 /*!\internal
+   Obsolete, called by moc generated code before Qt 4.6 for cloned signals
+   But since Qt 4.6, all clones are connected to their original
  */
 void QMetaObject::activate(QObject *sender, const QMetaObject *m,
                            int from_local_signal_index, int to_local_signal_index, void **argv)
 {
-    Q_ASSERT(from_local_signal_index <= to_local_signal_index);
-    int offset = m->methodOffset();
-    int from_signal_index = offset + from_local_signal_index;
-    int to_signal_index = offset + to_local_signal_index;
+    Q_UNUSED(to_local_signal_index);
+    Q_ASSERT(from_local_signal_index == QMetaObjectPrivate::originalClone(m, to_local_signal_index));
+    activate(sender, m, from_local_signal_index, argv);
+}
 
-    if (to_signal_index < (int)sizeof(sender->d_func()->connectedSignals) * 8
-        && !qt_signal_spy_callback_set.signal_begin_callback
-        && !qt_signal_spy_callback_set.signal_end_callback) {
+/*! \internal
+    Returns the signal index used in the internal connectionLists vector.
 
-        uint n = (from_signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        uint m = 1 << (from_signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
-        uint nt = (to_signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        uint mt = 1 << (to_signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
-        bool connected = false;
-        quint32 *connectedSignals = sender->d_func()->connectedSignals;
-        for (uint i = 0; !connected && i < (sizeof sender->d_func()->connectedSignals
-                                            / sizeof sender->d_func()->connectedSignals[0]); ++i) {
-            uint mask = 0;
-            if (i > n)
-                mask = ~0u;
-            else if (i == n)
-                mask = ~(m -1);
-            if (i > nt)
-                mask = 0;
-            else if (i == nt)
-                mask &= (mt << 1) - 1;
-            connected = connectedSignals[i] & mask;
-        }
-        if (!connected)
-            // nothing connected to these signals, and no spy
-            return;
-    }
-    activate(sender, from_signal_index, to_signal_index, argv);
+    It is different from QMetaObject::indexOfSignal():  indexOfSignal is the same as indexOfMethod
+    while QObjectPrivate::signalIndex is smaller because it doesn't give index to slots.
+*/
+int QObjectPrivate::signalIndex(const char *signalName) const
+{
+    Q_Q(const QObject);
+    const QMetaObject *base = q->metaObject();
+    int relative_index = QMetaObjectPrivate::indexOfSignalRelative(&base, signalName);
+    if (relative_index < 0)
+        return relative_index;
+    relative_index = QMetaObjectPrivate::originalClone(base, relative_index);
+    int signalOffset, methodOffset;
+    computeOffsets(base, &signalOffset, &methodOffset);
+    return relative_index + signalOffset;
 }
 
 /*! \internal
@@ -3413,14 +3479,16 @@ void QMetaObject::activate(QObject *sender, const QMetaObject *m,
   Returns true if the signal with index \a signal_index from object \a sender is connected.
   Signals with indices above a certain range are always considered connected (see connectedSignals
   in QObjectPrivate). If a signal spy is installed, all signals are considered connected.
+
+  \a signal_index must be the index returned by QObjectPrivate::signalIndex;
 */
-bool QMetaObject::isConnected(QObject *sender, int signal_index) {
-    if (signal_index < (int)sizeof(sender->d_func()->connectedSignals) * 8
+bool QObjectPrivate::isSignalConnected(int signal_index) const {
+    if (signal_index < (int)sizeof(connectedSignals) * 8
         && !qt_signal_spy_callback_set.signal_begin_callback
         && !qt_signal_spy_callback_set.signal_end_callback) {
-        uint n = (signal_index / (8 * sizeof sender->d_func()->connectedSignals[0]));
-        uint m = 1 << (signal_index - n * 8 * sizeof sender->d_func()->connectedSignals[0]);
-        if ((sender->d_func()->connectedSignals[n] & m) == 0)
+        uint n = (signal_index / (8 * sizeof connectedSignals[0]));
+        uint m = 1 << (signal_index - n * 8 * sizeof connectedSignals[0]);
+        if ((connectedSignals[n] & m) == 0)
             // nothing connected to these signals, and no spy
             return false;
     }
@@ -3626,8 +3694,21 @@ void QObject::dumpObjectInfo()
     qDebug("  SIGNALS OUT");
 
     if (d->connectionLists) {
+        int offset = 0;
+        int offsetToNextMetaObject = 0;
         for (int signal_index = 0; signal_index < d->connectionLists->count(); ++signal_index) {
-            const QMetaMethod signal = metaObject()->method(signal_index);
+            if (signal_index >= offsetToNextMetaObject) {
+                const QMetaObject *mo = metaObject();
+                int signalOffset, methodOffset;
+                computeOffsets(mo, &signalOffset, &methodOffset);
+                while (mo && signalOffset > signal_index) {
+                    mo = mo->superClass();
+                    offsetToNextMetaObject = signalOffset;
+                    computeOffsets(mo, &signalOffset, &methodOffset);
+                }
+                offset = offset - signalOffset + methodOffset;
+            }
+            const QMetaMethod signal = metaObject()->method(signal_index + offset);
             qDebug("        signal: %s", signal.signature());
 
             // receivers