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  1. Qt
  2. QTBUG-128350

QWaylandBufferRef::toOpenGLTexture leaks textures

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Details

    • Linux/Wayland
    • bd3cdc5c1 (dev), 97b70d6b4 (6.8), dae39b041 (6.7), 74bab5da8 (tqtc/lts-6.5)

    Description

      m_shmTexture in QtWayland::SharedMemoryBuffer is never freed.

      Can be reproduced with for example minimal-cpp example and when running a widget based client application.

      After 200 runs of opening an empty QWidget against minimal-cpp:

      6,656 (6,400 direct, 256 indirect) bytes in 32 blocks are definitely lost in loss record 10,471 of 10,529
  in View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  1: operator new(unsigned long) in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so
  2: QOpenGLTexture::QOpenGLTexture(QOpenGLTexture::Target) in /home/qt/work/qt/qtbase/src/opengl/qopengltexture.cpp:2446
  3: QtWayland::SharedMemoryBuffer::toOpenGlTexture(int) in /home/qt/work/qt/qtwayland/src/compositor/wayland_wrapper/qwlclientbuffer.cpp:131
  4: View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  5: Window::paintGL() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/window.cpp:43
  6: paint in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:63
  7: doFlush in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:73
  8: handleUpdateEvent in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:81
  9: QPaintDeviceWindow::event(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow.cpp:163
  10: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  11: QPlatformWindow::deliverUpdateRequest() in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:792
  12: QPlatformWindow::windowEvent(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:454
  13: QGuiApplication::notify(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qguiapplication.cpp:1988
  14: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  15: QTimerInfoList::activateTimers() in /home/qt/work/qt/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:434
  16: timerSourceDispatch(_GSource*, int (*)(void*), void*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:150
  17: g_main_context_dispatch in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  18: /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  19: g_main_context_iteration in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  20: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
  21: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventloop.cpp:182
  22: QCoreApplication::exec() in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1486
  23: main in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/main.cpp:17

      34,320 (1,320 direct, 33,000 indirect) bytes in 165 blocks are definitely lost in loss record 10,517 of 10,529
  in View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  1: operator new(unsigned long) in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so
  2: QtWayland::SharedMemoryBuffer::toOpenGlTexture(int) in /home/qt/work/qt/qtwayland/src/compositor/wayland_wrapper/qwlclientbuffer.cpp:131
  3: View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  4: Window::paintGL() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/window.cpp:43
  5: paint in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:63
  6: doFlush in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:73
  7: handleUpdateEvent in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:81
  8: QPaintDeviceWindow::event(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow.cpp:163
  9: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  10: QPlatformWindow::deliverUpdateRequest() in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:792
  11: QPlatformWindow::windowEvent(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:454
  12: QGuiApplication::notify(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qguiapplication.cpp:1988
  13: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  14: QTimerInfoList::activateTimers() in /home/qt/work/qt/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:434
  15: timerSourceDispatch(_GSource*, int (*)(void*), void*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:150
  16: g_main_context_dispatch in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  17: /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  18: g_main_context_iteration in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  19: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
  20: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventloop.cpp:182
  21: QCoreApplication::exec() in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1486
  22: main in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/main.cpp:17

      173,056 (166,400 direct, 6,656 indirect) bytes in 832 blocks are definitely lost in loss record 10,525 of 10,529
  in View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  1: operator new(unsigned long) in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so
  2: QOpenGLTexture::QOpenGLTexture(QOpenGLTexture::Target) in /home/qt/work/qt/qtbase/src/opengl/qopengltexture.cpp:2446
  3: QtWayland::SharedMemoryBuffer::toOpenGlTexture(int) in /home/qt/work/qt/qtwayland/src/compositor/wayland_wrapper/qwlclientbuffer.cpp:131
  4: View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  5: Window::paintGL() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/window.cpp:43
  6: paint in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:63
  7: doFlush in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:73
  8: handleUpdateEvent in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:81
  9: QPaintDeviceWindow::event(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow.cpp:163
  10: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  11: QPlatformWindow::deliverUpdateRequest() in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:792
  12: QPlatformWindow::windowEvent(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:454
  13: QGuiApplication::notify(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qguiapplication.cpp:1988
  14: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  15: QTimerInfoList::activateTimers() in /home/qt/work/qt/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:434
  16: timerSourceDispatch in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:150
  17: idleTimerSourceDispatch(_GSource*, int (*)(void*), void*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:197
  18: g_main_context_dispatch in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  19: /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  20: g_main_context_iteration in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  21: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
  22: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventloop.cpp:182
  23: QCoreApplication::exec() in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1486
  24: main in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/main.cpp:17

      281,216 (10,816 direct, 270,400 indirect) bytes in 1,352 blocks are definitely lost in loss record 10,528 of 10,529
  in View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  1: operator new(unsigned long) in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so
  2: QtWayland::SharedMemoryBuffer::toOpenGlTexture(int) in /home/qt/work/qt/qtwayland/src/compositor/wayland_wrapper/qwlclientbuffer.cpp:131
  3: View::getTexture() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/compositor.cpp:18
  4: Window::paintGL() in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/window.cpp:43
  5: paint in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:63
  6: doFlush in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:73
  7: handleUpdateEvent in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow_p.h:81
  8: QPaintDeviceWindow::event(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qpaintdevicewindow.cpp:163
  9: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  10: QPlatformWindow::deliverUpdateRequest() in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:792
  11: QPlatformWindow::windowEvent(QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qplatformwindow.cpp:454
  12: QGuiApplication::notify(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/gui/kernel/qguiapplication.cpp:1988
  13: QCoreApplication::notifyInternal2(QObject*, QEvent*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1142
  14: QTimerInfoList::activateTimers() in /home/qt/work/qt/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:434
  15: timerSourceDispatch in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:150
  16: idleTimerSourceDispatch(_GSource*, int (*)(void*), void*) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:197
  17: g_main_context_dispatch in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  18: /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  19: g_main_context_iteration in /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7200.4
  20: QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:394
  21: QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) in /home/qt/work/qt/qtbase/src/corelib/kernel/qeventloop.cpp:182
  22: QCoreApplication::exec() in /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:1486
  23: main in /home/user/Qt/Examples/Qt-6.7.2/wayland/minimal-cpp/main.cpp:17

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              Updated:
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