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qt5-qtbase/QTBUG-51649-QtDBus-finish-a...

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From 136eeec876ed5b995e7c27bcdcefe0199f5f183d Mon Sep 17 00:00:00 2001
From: Weng Xuetian <wengxt@gmail.com>
Date: Thu, 3 Mar 2016 21:56:53 -0800
Subject: [PATCH] QtDBus: finish all pending call with error if disconnected
libdbus will send a local signal if connection gets disconnected. When
this happens, end all pending calls with QDBusError::Disconnected.
Task-number: QTBUG-51649
Change-Id: I5c7d2a468bb5da746d0c0e53e458c1e376f186a9
---
src/dbus/qdbusintegrator.cpp | 26 +++++++++++++++++-----
src/dbus/qdbusutil_p.h | 6 +++++
.../dbus/qdbusconnection/tst_qdbusconnection.cpp | 22 ++++++++++++++++++
.../dbus/qdbusconnection/tst_qdbusconnection.h | 1 +
4 files changed, 49 insertions(+), 6 deletions(-)
diff --git a/src/dbus/qdbusintegrator.cpp b/src/dbus/qdbusintegrator.cpp
index cd44861..320419f 100644
--- a/src/dbus/qdbusintegrator.cpp
+++ b/src/dbus/qdbusintegrator.cpp
@@ -519,6 +519,14 @@ bool QDBusConnectionPrivate::handleMessage(const QDBusMessage &amsg)
switch (amsg.type()) {
case QDBusMessage::SignalMessage:
handleSignal(amsg);
+ // Check local disconnected signal from libdbus
+ if (amsg.interface() == QDBusUtil::dbusInterfaceLocal()
+ && amsg.path() == QDBusUtil::dbusPathLocal()
+ && amsg.member() == QDBusUtil::disconnected()
+ && !QDBusMessagePrivate::isLocal(amsg)) {
+ while (!pendingCalls.isEmpty())
+ processFinishedCall(pendingCalls.first());
+ }
// if there are any other filters in this DBusConnection,
// let them see the signal too
return false;
@@ -1767,10 +1775,16 @@ void QDBusConnectionPrivate::processFinishedCall(QDBusPendingCallPrivate *call)
QDBusMessage &msg = call->replyMessage;
if (call->pending) {
- // decode the message
- DBusMessage *reply = q_dbus_pending_call_steal_reply(call->pending);
- msg = QDBusMessagePrivate::fromDBusMessage(reply, connection->capabilities);
- q_dbus_message_unref(reply);
+ // when processFinishedCall is called and pending call is not completed,
+ // it means we received disconnected signal from libdbus
+ if (q_dbus_pending_call_get_completed(call->pending)) {
+ // decode the message
+ DBusMessage *reply = q_dbus_pending_call_steal_reply(call->pending);
+ msg = QDBusMessagePrivate::fromDBusMessage(reply, connection->capabilities);
+ q_dbus_message_unref(reply);
+ } else {
+ msg = QDBusMessage::createError(QDBusError::Disconnected, QDBusUtil::disconnectedErrorMessage());
+ }
}
qDBusDebug() << connection << "got message reply:" << msg;
@@ -2070,8 +2084,8 @@ void QDBusConnectionPrivate::sendInternal(QDBusPendingCallPrivate *pcall, void *
pcall->pending = pending;
q_dbus_pending_call_set_notify(pending, qDBusResultReceived, pcall, 0);
- // DBus won't notify us when a peer disconnects so we need to track these ourselves
- if (mode == QDBusConnectionPrivate::PeerMode)
+ // DBus won't notify us when a peer disconnects or server terminates so we need to track these ourselves
+ if (mode == QDBusConnectionPrivate::PeerMode || mode == QDBusConnectionPrivate::ClientMode)
pendingCalls.append(pcall);
return;
diff --git a/src/dbus/qdbusutil_p.h b/src/dbus/qdbusutil_p.h
index 8f5ae92..ca70ff9 100644
--- a/src/dbus/qdbusutil_p.h
+++ b/src/dbus/qdbusutil_p.h
@@ -155,6 +155,8 @@ namespace QDBusUtil
{ return QStringLiteral(DBUS_SERVICE_DBUS); }
inline QString dbusPath()
{ return QStringLiteral(DBUS_PATH_DBUS); }
+ inline QString dbusPathLocal()
+ { return QStringLiteral(DBUS_PATH_LOCAL); }
inline QString dbusInterface()
{
// it's the same string, but just be sure
@@ -165,8 +167,12 @@ namespace QDBusUtil
{ return QStringLiteral(DBUS_INTERFACE_PROPERTIES); }
inline QString dbusInterfaceIntrospectable()
{ return QStringLiteral(DBUS_INTERFACE_INTROSPECTABLE); }
+ inline QString dbusInterfaceLocal()
+ { return QStringLiteral(DBUS_INTERFACE_LOCAL); }
inline QString nameOwnerChanged()
{ return QStringLiteral("NameOwnerChanged"); }
+ inline QString disconnected()
+ { return QStringLiteral("Disconnected"); }
inline QString disconnectedErrorMessage()
{ return QStringLiteral("Not connected to D-Bus server"); }
}
diff --git a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
index e91f87d..6c7e6b1 100644
--- a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
+++ b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
@@ -1218,6 +1218,28 @@ void tst_QDBusConnection::callVirtualObjectLocal()
QCOMPARE(obj.replyArguments, subPathReply.arguments());
}
+void tst_QDBusConnection::pendingCallWhenDisconnected()
+{
+ QDBusServer *server = new QDBusServer;
+ QDBusConnection con = QDBusConnection::connectToPeer(server->address(), "disconnect");
+ QTestEventLoop::instance().enterLoop(2);
+ QVERIFY(!QTestEventLoop::instance().timeout());
+ QVERIFY(con.isConnected());
+
+ delete server;
+
+ // Make sure we call the method before we know it is disconnected.
+ QVERIFY(con.isConnected());
+ QDBusMessage message = QDBusMessage::createMethodCall("", "/", QString(), "method");
+ QDBusPendingCall reply = con.asyncCall(message);
+
+ QTestEventLoop::instance().enterLoop(2);
+ QVERIFY(!con.isConnected());
+ QVERIFY(reply.isFinished());
+ QVERIFY(reply.isError());
+ QVERIFY(reply.error().type() == QDBusError::Disconnected);
+}
+
QString MyObject::path;
QString MyObjectWithoutInterface::path;
QString MyObjectWithoutInterface::interface;
diff --git a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
index a53ba32..720e484 100644
--- a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
+++ b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
@@ -121,6 +121,7 @@ private slots:
void registerVirtualObject();
void callVirtualObject();
void callVirtualObjectLocal();
+ void pendingCallWhenDisconnected();
public:
QString serviceName() const { return "org.qtproject.Qt.Autotests.QDBusConnection"; }
--
2.5.0
diff -up qtbase-opensource-src-5.6.0-rc/src/dbus/dbus_minimal_p.h.QTBUG-51649 qtbase-opensource-src-5.6.0-rc/src/dbus/dbus_minimal_p.h
--- qtbase-opensource-src-5.6.0-rc/src/dbus/dbus_minimal_p.h.QTBUG-51649 2016-02-18 01:24:38.000000000 -0600
+++ qtbase-opensource-src-5.6.0-rc/src/dbus/dbus_minimal_p.h 2016-03-11 11:40:11.176244645 -0600
@@ -99,8 +99,10 @@ typedef dbus_uint32_t dbus_bool_t;
/* dbus-shared.h */
#define DBUS_SERVICE_DBUS "org.freedesktop.DBus"
#define DBUS_PATH_DBUS "/org/freedesktop/DBus"
+#define DBUS_PATH_LOCAL "/org/freedesktop/DBus/Local"
#define DBUS_INTERFACE_DBUS "org.freedesktop.DBus"
#define DBUS_INTERFACE_INTROSPECTABLE "org.freedesktop.DBus.Introspectable"
+#define DBUS_INTERFACE_LOCAL "org.freedesktop.DBus.Local"
#define DBUS_INTERFACE_PROPERTIES "org.freedesktop.DBus.Properties"
#define DBUS_NAME_FLAG_ALLOW_REPLACEMENT 0x1 /**< Allow another service to become the primary owner if requested */
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