Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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6.1.0
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None
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Linux/X11
Description
When checking our application for memory leaks, we found some memory not freed by the QXcbSessionManager, e.g.:
==122696== 4 bytes in 1 blocks are still reachable in loss record 2 of 95 ==122696== at 0x483E77F: malloc (vg_replace_malloc.c:307) ==122696== by 0x7FD15BE: strdup (in /usr/lib/libc-2.33.so) ==122696== by 0x9151B08: IceRegisterForProtocolSetup (in /usr/lib/libICE.so.6.3.0) ==122696== by 0x9138655: SmcOpenConnection (in /usr/lib/libSM.so.6.0.1) ==122696== by 0x8F26964: QXcbSessionManager::QXcbSessionManager(QString const&, QString const&) (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6XcbQpa.so.6.1.0) ==122696== by 0x8F03A9A: QXcbIntegration::createPlatformSessionManager(QString const&, QString const&) const (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6XcbQpa.so.6.1.0) ==122696== by 0x552EEEF: QSessionManagerPrivate::QSessionManagerPrivate(QString const&, QString const&) (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6Gui.so.6.1.0) ==122696== by 0x552EFE4: QSessionManager::QSessionManager(QGuiApplication*, QString&, QString&) (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6Gui.so.6.1.0) ==122696== by 0x54EFC76: QGuiApplicationPrivate::init() (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6Gui.so.6.1.0) ==122696== by 0x4C5734D: QApplicationPrivate::init() (in /local/ssd/mlangen/build/a3gui.default/usr/lib/libQt6Widgets.so.6.1.0)
You can trigger the output by using valgrind with the --leak-check=full --show-leak-kinds=all options on the following program:
#include <QApplication> int main(int argc, char **argv) { QApplication app(argc, argv); return 0; }
Having a look at the source code, it looks like the open Smc connection is closed again, but maybe there might be more to be done...