diff options
author | Simon Hausmann <simon.hausmann@digia.com> | 2014-01-02 14:35:15 +0100 |
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committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-01-02 16:15:10 +0100 |
commit | c2e2e0151e51b5870f41c993d4c7f3a3c16e5405 (patch) | |
tree | 58f1a7c2aa32a3e7ec48fe74746cbcc8ba71abf2 /src/dbus/qdbusabstractinterface_p.h | |
parent | 68974f31ff12b04580a1d18a56994212d9af56a9 (diff) |
Fix crashes when calling into qdbus interfaces from QML
The meta-call convention for reading properties differs between Qml and QDBus.
QML expects only to provide a pointer to the return value in args[0]. That is
also how the metacall was originally introduced in Qt 4. QDBus also expects
that the caller allocates a QVariant and provides a pointer to it in a[2], in
addition to a[1] being a pointer to an int that is used to report where the
return value can be found (in where a[0] points to or the variant in a[1]) -
this is useful to report errors when reading the property by clearing the
variant.
For performance reasons, QML avoids the creation of a QVariant when reading
properties. As however QDBus expects it, a crash occurs.
This patch changes the QDBus metacall implementation to not rely on the caller
to provide a QVariant.
Task-number: QTBUG-15052
Change-Id: I2f2c5b3ef2c1d93cc72eee1fa32a95d299a104c0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/dbus/qdbusabstractinterface_p.h')
-rw-r--r-- | src/dbus/qdbusabstractinterface_p.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/dbus/qdbusabstractinterface_p.h b/src/dbus/qdbusabstractinterface_p.h index 05ca04e3ef..e696781cdc 100644 --- a/src/dbus/qdbusabstractinterface_p.h +++ b/src/dbus/qdbusabstractinterface_p.h @@ -89,7 +89,7 @@ public: bool canMakeCalls() const; // these functions do not check if the property is valid - void property(const QMetaProperty &mp, QVariant &where) const; + bool property(const QMetaProperty &mp, void *returnValuePtr) const; bool setProperty(const QMetaProperty &mp, const QVariant &value); // return conn's d pointer |