Merge #16348: qt: Assert QMetaObject::invokeMethod result

64fee489448c62319e77941c30152084695b5a5d qt: Assert QMetaObject::invokeMethod result (João Barbosa)
f27bd96b5fdc2921d93c44bbf422bff0e979c4de gui: Fix missing qRegisterMetaType(WalletModel*) (João Barbosa)

Pull request description:

  Invalid/wrong dynamic calls aren't verified by the compiler. This PR asserts those dynamic calls. Once we bump Qt to at least 5.10 these can be refactored to use the `invokeMethod` overload that allows connecting to lambdas or member pointers, which are compile checked.

  For reference, one of the overloaded versions is https://doc.qt.io/qt-5/qmetaobject.html#invokeMethod-5.

ACKs for top commit:
  laanwj:
    ACK 64fee489448c62319e77941c30152084695b5a5d

Tree-SHA512: d332e5d7eb2c7be5d3fe90e2e4ff20a67800b9664f6637c122a23647a964f7915703d3f086e2de440f695cfe14de268ff581d0092b7736e911952a4f4d248e25

8 files changed, 47 insertions, 22 deletions

diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index cf0b48b545..4a9742f7b7 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -448,6 +448,9 @@ int GuiMain(int argc, char* argv[])
 
     // Register meta types used for QMetaObject::invokeMethod
     qRegisterMetaType< bool* >();
+#ifdef ENABLE_WALLET
+    qRegisterMetaType<WalletModel*>();
+#endif
     //   Need to pass name here as CAmount is a typedef (see http://qt-project.org/doc/qt-5/qmetatype.html#qRegisterMetaType)
     //   IMPORTANT if it is no longer a typedef use the normal variant above
     qRegisterMetaType< CAmount >("CAmount");
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index 266e16ebeb..c9a09573f9 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -1375,12 +1375,13 @@ static bool ThreadSafeMessageBox(BitcoinGUI* gui, const std::string& message, co
     style &= ~CClientUIInterface::SECURE;
     bool ret = false;
     // In case of modal message, use blocking connection to wait for user to click a button
-    QMetaObject::invokeMethod(gui, "message",
+    bool invoked = QMetaObject::invokeMethod(gui, "message",
                                modal ? GUIUtil::blockingGUIThreadConnection() : Qt::QueuedConnection,
                                Q_ARG(QString, QString::fromStdString(caption)),
                                Q_ARG(QString, QString::fromStdString(message)),
                                Q_ARG(unsigned int, style),
                                Q_ARG(bool*, &ret));
+    assert(invoked);
     return ret;
 }
 
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index ce950150df..238be08480 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -184,34 +184,39 @@ void ClientModel::updateBanlist()
 static void ShowProgress(ClientModel *clientmodel, const std::string &title, int nProgress)
 {
     // emits signal "showProgress"
-    QMetaObject::invokeMethod(clientmodel, "showProgress", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(clientmodel, "showProgress", Qt::QueuedConnection,
                               Q_ARG(QString, QString::fromStdString(title)),
                               Q_ARG(int, nProgress));
+    assert(invoked);
 }
 
 static void NotifyNumConnectionsChanged(ClientModel *clientmodel, int newNumConnections)
 {
     // Too noisy: qDebug() << "NotifyNumConnectionsChanged: " + QString::number(newNumConnections);
-    QMetaObject::invokeMethod(clientmodel, "updateNumConnections", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(clientmodel, "updateNumConnections", Qt::QueuedConnection,
                               Q_ARG(int, newNumConnections));
+    assert(invoked);
 }
 
 static void NotifyNetworkActiveChanged(ClientModel *clientmodel, bool networkActive)
 {
-    QMetaObject::invokeMethod(clientmodel, "updateNetworkActive", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(clientmodel, "updateNetworkActive", Qt::QueuedConnection,
                               Q_ARG(bool, networkActive));
+    assert(invoked);
 }
 
 static void NotifyAlertChanged(ClientModel *clientmodel)
 {
     qDebug() << "NotifyAlertChanged";
-    QMetaObject::invokeMethod(clientmodel, "updateAlert", Qt::QueuedConnection);
+    bool invoked = QMetaObject::invokeMethod(clientmodel, "updateAlert", Qt::QueuedConnection);
+    assert(invoked);
 }
 
 static void BannedListChanged(ClientModel *clientmodel)
 {
     qDebug() << QString("%1: Requesting update for peer banlist").arg(__func__);
-    QMetaObject::invokeMethod(clientmodel, "updateBanlist", Qt::QueuedConnection);
+    bool invoked = QMetaObject::invokeMethod(clientmodel, "updateBanlist", Qt::QueuedConnection);
+    assert(invoked);
 }
 
 static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, int height, int64_t blockTime, double verificationProgress, bool fHeader)
@@ -233,11 +238,12 @@ static void BlockTipChanged(ClientModel *clientmodel, bool initialSync, int heig
     // if we are in-sync or if we notify a header update, update the UI regardless of last update time
     if (fHeader || !initialSync || now - nLastUpdateNotification > MODEL_UPDATE_DELAY) {
         //pass an async signal to the UI thread
-        QMetaObject::invokeMethod(clientmodel, "numBlocksChanged", Qt::QueuedConnection,
+        bool invoked = QMetaObject::invokeMethod(clientmodel, "numBlocksChanged", Qt::QueuedConnection,
                                   Q_ARG(int, height),
                                   Q_ARG(QDateTime, QDateTime::fromTime_t(blockTime)),
                                   Q_ARG(double, verificationProgress),
                                   Q_ARG(bool, fHeader));
+        assert(invoked);
         nLastUpdateNotification = now;
     }
 }
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index dcb9d1923f..98eeee1a47 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -156,11 +156,12 @@ void SplashScreen::finish()
 
 static void InitMessage(SplashScreen *splash, const std::string &message)
 {
-    QMetaObject::invokeMethod(splash, "showMessage",
+    bool invoked = QMetaObject::invokeMethod(splash, "showMessage",
         Qt::QueuedConnection,
         Q_ARG(QString, QString::fromStdString(message)),
         Q_ARG(int, Qt::AlignBottom|Qt::AlignHCenter),
         Q_ARG(QColor, QColor(55,55,55)));
+    assert(invoked);
 }
 
 static void ShowProgress(SplashScreen *splash, const std::string &title, int nProgress, bool resume_possible)
diff --git a/src/qt/test/wallettests.cpp b/src/qt/test/wallettests.cpp
index e54915ec75..120dff95c0 100644
--- a/src/qt/test/wallettests.cpp
+++ b/src/qt/test/wallettests.cpp
@@ -68,7 +68,8 @@ uint256 SendCoins(CWallet& wallet, SendCoinsDialog& sendCoinsDialog, const CTxDe
         if (status == CT_NEW) txid = hash;
     }));
     ConfirmSend();
-    QMetaObject::invokeMethod(&sendCoinsDialog, "on_sendButton_clicked");
+    bool invoked = QMetaObject::invokeMethod(&sendCoinsDialog, "on_sendButton_clicked");
+    assert(invoked);
     return txid;
 }
 
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 6fe35b13cf..1064c60dfd 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -687,10 +687,11 @@ public:
     {
         QString strHash = QString::fromStdString(hash.GetHex());
         qDebug() << "NotifyTransactionChanged: " + strHash + " status= " + QString::number(status);
-        QMetaObject::invokeMethod(ttm, "updateTransaction", Qt::QueuedConnection,
+        bool invoked = QMetaObject::invokeMethod(ttm, "updateTransaction", Qt::QueuedConnection,
                                   Q_ARG(QString, strHash),
                                   Q_ARG(int, status),
                                   Q_ARG(bool, showTransaction));
+        assert(invoked);
     }
 private:
     uint256 hash;
@@ -725,12 +726,16 @@ static void ShowProgress(TransactionTableModel *ttm, const std::string &title, i
     if (nProgress == 100)
     {
         fQueueNotifications = false;
-        if (vQueueNotifications.size() > 10) // prevent balloon spam, show maximum 10 balloons
-            QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, true));
+        if (vQueueNotifications.size() > 10) { // prevent balloon spam, show maximum 10 balloons
+            bool invoked = QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, true));
+            assert(invoked);
+        }
         for (unsigned int i = 0; i < vQueueNotifications.size(); ++i)
         {
-            if (vQueueNotifications.size() - i <= 10)
-                QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, false));
+            if (vQueueNotifications.size() - i <= 10) {
+                bool invoked = QMetaObject::invokeMethod(ttm, "setProcessingQueuedTransactions", Qt::QueuedConnection, Q_ARG(bool, false));
+                assert(invoked);
+            }
 
             vQueueNotifications[i].invoke(ttm);
         }
diff --git a/src/qt/walletcontroller.cpp b/src/qt/walletcontroller.cpp
index 4d489d7f44..2aedb77798 100644
--- a/src/qt/walletcontroller.cpp
+++ b/src/qt/walletcontroller.cpp
@@ -124,7 +124,8 @@ WalletModel* WalletController::getOrCreateWallet(std::unique_ptr<interfaces::Wal
     } else {
         // Handler callback runs in a different thread so fix wallet model thread affinity.
         wallet_model->moveToThread(thread());
-        QMetaObject::invokeMethod(this, "addWallet", Qt::QueuedConnection, Q_ARG(WalletModel*, wallet_model));
+        bool invoked = QMetaObject::invokeMethod(this, "addWallet", Qt::QueuedConnection, Q_ARG(WalletModel*, wallet_model));
+        assert(invoked);
     }
 
     return wallet_model;
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index c1eba61749..c1b798bad6 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -374,13 +374,15 @@ bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureStri
 static void NotifyUnload(WalletModel* walletModel)
 {
     qDebug() << "NotifyUnload";
-    QMetaObject::invokeMethod(walletModel, "unload");
+    bool invoked = QMetaObject::invokeMethod(walletModel, "unload");
+    assert(invoked);
 }
 
 static void NotifyKeyStoreStatusChanged(WalletModel *walletmodel)
 {
     qDebug() << "NotifyKeyStoreStatusChanged";
-    QMetaObject::invokeMethod(walletmodel, "updateStatus", Qt::QueuedConnection);
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "updateStatus", Qt::QueuedConnection);
+    assert(invoked);
 }
 
 static void NotifyAddressBookChanged(WalletModel *walletmodel,
@@ -392,38 +394,43 @@ static void NotifyAddressBookChanged(WalletModel *walletmodel,
     QString strPurpose = QString::fromStdString(purpose);
 
     qDebug() << "NotifyAddressBookChanged: " + strAddress + " " + strLabel + " isMine=" + QString::number(isMine) + " purpose=" + strPurpose + " status=" + QString::number(status);
-    QMetaObject::invokeMethod(walletmodel, "updateAddressBook", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "updateAddressBook", Qt::QueuedConnection,
                               Q_ARG(QString, strAddress),
                               Q_ARG(QString, strLabel),
                               Q_ARG(bool, isMine),
                               Q_ARG(QString, strPurpose),
                               Q_ARG(int, status));
+    assert(invoked);
 }
 
 static void NotifyTransactionChanged(WalletModel *walletmodel, const uint256 &hash, ChangeType status)
 {
     Q_UNUSED(hash);
     Q_UNUSED(status);
-    QMetaObject::invokeMethod(walletmodel, "updateTransaction", Qt::QueuedConnection);
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "updateTransaction", Qt::QueuedConnection);
+    assert(invoked);
 }
 
 static void ShowProgress(WalletModel *walletmodel, const std::string &title, int nProgress)
 {
     // emits signal "showProgress"
-    QMetaObject::invokeMethod(walletmodel, "showProgress", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "showProgress", Qt::QueuedConnection,
                               Q_ARG(QString, QString::fromStdString(title)),
                               Q_ARG(int, nProgress));
+    assert(invoked);
 }
 
 static void NotifyWatchonlyChanged(WalletModel *walletmodel, bool fHaveWatchonly)
 {
-    QMetaObject::invokeMethod(walletmodel, "updateWatchOnlyFlag", Qt::QueuedConnection,
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "updateWatchOnlyFlag", Qt::QueuedConnection,
                               Q_ARG(bool, fHaveWatchonly));
+    assert(invoked);
 }
 
 static void NotifyCanGetAddressesChanged(WalletModel* walletmodel)
 {
-    QMetaObject::invokeMethod(walletmodel, "canGetAddressesChanged");
+    bool invoked = QMetaObject::invokeMethod(walletmodel, "canGetAddressesChanged");
+    assert(invoked);
 }
 
 void WalletModel::subscribeToCoreSignals()