0

使用：

valgrind --leak-check=full -v --fullpath-after=. --num-callers=50 --track-origins=yes --leak-resolution=high offline

Valgrind 说：

==8914== Conditional jump or move depends on uninitialised value(s)
==8914==    at 0x62E9ADD: QTextFormatCollection::indexForFormat(QTextFormat const&) (/var/tmp/qt-src/src/gui/text/qtextformat.cpp:3075)
==8914==    by 0x6301D65: QTextDocumentPrivate::init() (/var/tmp/qt-src/src/gui/text/qtextdocument_p.cpp:228)
==8914==    by 0x630350B: QTextDocumentPrivate::clear() (/var/tmp/qt-src/src/gui/text/qtextdocument_p.cpp:275)
==8914==    by 0x62F41E7: QTextDocument::setHtml(QString const&) (/var/tmp/qt-src/src/gui/text/qtextdocument.cpp:1186)
==8914==    by 0x62C123E: QTextControlPrivate::setContent(Qt::TextFormat, QString const&, QTextDocument*) (/var/tmp/qt-src/src/gui/text/qtextcontrol.cpp:481)
==8914==    by 0x64F4C8E: QTextEditPrivate::init(QString const&) (/var/tmp/qt-src/src/gui/widgets/qtextedit.cpp:174)
==8914==    by 0x64F5528: QTextEdit::QTextEdit(QString const&, QWidget*) (/var/tmp/qt-src/src/gui/widgets/qtextedit.cpp:625)
==8914==    by 0x40E1B3: controlRThroughQt::controlRThroughQt() (in /home/anisha/.../offline)
==8914==    by 0x40E933: main (in /home/anisha/.../offline)
==8914==  Uninitialised value was created by a stack allocation
==8914==    at 0x62E73B0: QTextFormatPrivate::recalcHash() const (/var/tmp/qt-src/src/gui/text/qtextformat.cpp:317)
==8914==

您认为哪些值在这里未初始化？

构造函数：

controlRThroughQt :: controlRThroughQt ()
{
    /** Qt widget's interface which will be controlling the R's widget */
    window          = new QMainWindow  ();
    centralWidget = new QWidget (window);

    refresh          = new QPushButton ("Start R", window);
    refresh->setFixedSize   (55, 55);
    connect (refresh, SIGNAL (clicked ()), this, SLOT (slotRefreshR ()));

    zoomIn          = new QPushButton ("Zoom\nin", window);
    zoomIn->setFixedSize   (55, 55);
    connect (zoomIn, SIGNAL (clicked ()), this, SLOT (slotZoomInR ()));

    zoomOut        = new QPushButton ("Zoom\nout", window);
    zoomOut->setFixedSize   (55, 55);
    connect (zoomOut, SIGNAL (clicked ()), this, SLOT (slotZoomOutR ()));

    panLeft          = new QPushButton ("Pan\nLeft", window);
    panLeft->setFixedSize   (55, 55);
    connect (panLeft, SIGNAL (clicked ()), this, SLOT (slotPanLeftR ()));

    panRight         = new QPushButton ("Pan\nRight", window);
    panRight->setFixedSize   (55, 55);
    connect (panRight, SIGNAL (clicked ()), this, SLOT (slotPanRightR ()));

    panTop          = new QPushButton ("Pan\nTop", window);
    panTop->setFixedSize   (55, 55);
    connect (panTop, SIGNAL (clicked ()), this, SLOT (slotPanTopR ()));

    panBottom      = new QPushButton ("Pan\nBottom", window);
    panBottom->setFixedSize   (55, 55);
    connect (panBottom, SIGNAL (clicked ()), this, SLOT (slotPanBottomR ()));

    panBottomRight = new QPushButton ("Bottom\nRight", window);
    panBottomRight->setFixedSize   (55, 55);
    connect (panBottomRight, SIGNAL (clicked ()), this, SLOT (slotPanBottomRightR ()));

    panBottomLeft   = new QPushButton ("Bottom\nLeft", window);
    panBottomLeft->setFixedSize   (55, 55);
    connect (panBottomLeft, SIGNAL (clicked ()), this, SLOT (slotPanBottomLeftR ()));

    panTopRight     = new QPushButton ("Top\nRight", window);
    panTopRight->setFixedSize   (55, 55);
    connect (panTopRight, SIGNAL (clicked ()), this, SLOT (slotPanTopRightR ()));

    panTopLeft      = new QPushButton ("Top\nLeft", window);
    panTopLeft->setFixedSize   (55, 55);
    connect (panTopLeft, SIGNAL (clicked ()), this, SLOT (slotPanTopLeftR ()));

    findInfo        = new QPushButton ("Find\nInfo.", window);
    findInfo->setFixedSize   (55, 55);
    connect (findInfo, SIGNAL (clicked ()), this, SLOT (slotFindInfoR ()));

    textEdit        = new QTextEdit ("Vehicle Info. will be shown here.", window);
    textEdit->setReadOnly (true);
    textEdit->setFixedSize (155, 555);

    layout          = new QGridLayout ();
    centralWidget->setLayout (layout);
    layout->addWidget (refresh, 0, 0);
    layout->addWidget (zoomIn, 1, 0);
    layout->addWidget (zoomOut, 1, 1);

    layout->addWidget (panLeft, 2, 0);
    layout->addWidget (panRight, 2, 1);
    layout->addWidget (panTop, 3, 0);
    layout->addWidget (panBottom, 3, 1);

    layout->addWidget (panBottomRight, 4, 0);
    layout->addWidget (panBottomLeft, 4, 1);
    layout->addWidget (panTopRight, 5, 0);
    layout->addWidget (panTopLeft, 5, 1);

    layout->addWidget (findInfo, 6, 0);
    layout->addWidget (textEdit, 7, 0);

    window->setCentralWidget (centralWidget);
    window->setWindowFlags (Qt::WindowStaysOnTopHint);
    window->show ();
}

成员函数调用：

void controlRThroughQt :: slotRefreshR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (0, 0, 0); }

void controlRThroughQt :: slotPanLeftR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (1, 0, 0); }
void controlRThroughQt :: slotPanRightR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (2, 0, 0); }
void controlRThroughQt :: slotPanTopR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (3, 0, 0); }
void controlRThroughQt :: slotPanBottomR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (4, 0, 0); }

void controlRThroughQt :: slotPanTopLeftR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (5, 0, 0); }
void controlRThroughQt :: slotPanTopRightR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (6, 0, 0); }
void controlRThroughQt :: slotPanBottomLeftR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (7, 0, 0); }
void controlRThroughQt :: slotPanBottomRightR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (8, 0, 0); }

void controlRThroughQt :: slotZoomInR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (9, 0, 0); }
void controlRThroughQt :: slotZoomOutR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (10, 0, 0); }

void controlRThroughQt :: slotFindInfoR () { rdaTilesOnR :: loadNewTileAndPlotPointsOnRWidget (12, 0, 0); }

更新：

controlRThroughQt :: controlRThroughQt () : 
                    window (new QMainWindow  ()),
                    centralWidget (new QWidget (window)),
                    refresh (new QPushButton ("Start R", window)), 
                    zoomIn (new QPushButton ("Zoom\nin", window)),
                    zoomOut (new QPushButton ("Zoom\nout", window)),
                    panLeft (new QPushButton ("Pan\nLeft", window)),
                    panRight (new QPushButton ("Pan\nRight", window)),
                    panTop (new QPushButton ("Pan\nTop", window)),
                    panBottom (new QPushButton ("Pan\nBottom", window)),
                    panBottomRight (new QPushButton ("Bottom\nRight", window)),
                    panBottomLeft (new QPushButton ("Bottom\nLeft", window)),
                    panTopRight (new QPushButton ("Top\nRight", window)),
                    panTopLeft (new QPushButton ("Top\nLeft", window)),
                    findInfo (new QPushButton ("Find\nInfo.", window)),
                    textEdit (new QTextEdit ("Vehicle Info.", window)),
                    layout (new QGridLayout ())

如上所示，我更新了我的代码，但错误QTextEdit仍然存​​在。当我从 Qt GUI 中完全删除 QTextEdit 时，错误消失了。
请指导。

4

2 回答 2

2

您所做的不是初始化，而是分配。
检查成员初始化列表。

于 2012-12-05T11:03:42.747 回答
0

从我可以从代码中看出，问题出在 Qt 本身。编写一个仅包含 QTextEdit 的最小应用程序，看看是否会遇到类似的错误。如果是，这是 Qt 的问题，而不是您的问题，您应该将错误添加到抑制列表中。

于 2012-12-05T18:04:23.257 回答