在QT-5.7.0上的QMenu上检测到Valgring问题

时间：2017-01-23 08:52:28

标签： qt memory-leaks valgrind qmenu qmenubar

创建一个只有QMenuBar的简单程序，我设法通过Valgring GBD检测到问题。

这是我的程序

main.cpp中：

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.cpp：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QMenuBar>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QMenuBar *menuBar = new QMenuBar(this);
    QMenu *menu = new QMenu(menuBar);
    menu->setTitle("test");
    menu->addAction("test1", this, SLOT(onTest1()));
    menu->addAction("test2", this, SLOT(onTest2()));
    menuBar->addMenu(menu);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::onTest1()
{
    qInfo("TEST1");
}

void MainWindow::onTest2()
{
    qInfo("TEST2");
}

当我使用＆＃34; Valgrind Memory Analyzer with GBD＆＃34;启动时，点击动作＆＃34; test1＆＃34;或者＆＃34; test2＆＃34;，检测到以下错误：

  

== 31965 == Syscall param writev（vector [...]）指向未初始化的字节   == 31965 ==在0x6BE040D：??? （系统调用-template.S：84）   == 31965 == by 0xBF97F28：??? （在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xBF9831C：??? （在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xBF98A76：??? （在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xBF98C43：xcb_flush（在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xD573C2F：QXcbWindow :: hide（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5.7.0中）   == 31965 == by 0x578BE64：QWindow :: setVisible（bool）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Gui.so.5.7.0中）   == 31965 == by 0x4FC866E：QWidgetPrivate :: hide_sys（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4FCE7AC：QWidgetPrivate :: hide_helper（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4FD37E7：QWidget :: setVisible（bool）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4FCEAE7：QWidgetPrivate :: close_helper（QWidgetPrivate :: CloseMode）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0）   == 31965 == by 0x50F3E3A：??? （在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x50F47DE：??? （在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x50F4AEB：??? （在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x50F87C5：QMenu :: mouseReleaseEvent（QMouseEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4FD3B77：QWidget :: event（QEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x50F91CA：QMenu :: event（QEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4F8E52B：QApplicationPrivate :: notify_helper（QObject *，QEvent *）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0）   == 31965 == by 0x4F95807：QApplication :: notify（QObject *，QEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x60A2ADF：QCoreApplication :: notifyInternal2（QObject *，QEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Core.so.5.7.0中）   == 31965 == by 0x4F947BE：QApplicationPrivate :: sendMouseEvent（QWidget *，QMouseEvent *，QWidget *，   QWidget *，QWidget **，QPointer＆amp;，bool）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0）   == 31965 == by 0x4FEF5FA：??? （在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4FF1512：??? （在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x4F8E52B：QApplicationPrivate :: notify_helper（QObject *，QEvent *）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0）   == 31965 == by 0x4F9521F：QApplication :: notify（QObject *，QEvent *）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 ==地址0xcc97941是一个大小为21,152的块内的4,545字节alloc＆＃39; d   == 31965 ==在0x4C2FB55：calloc（在/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so中）   == 31965 == by 0xBF978DB：xcb_connect_to_fd（在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xBF9B610：xcb_connect_to_display_with_auth_info（在/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0中）   == 31965 == by 0xB872809：_XConnectXCB（在/usr/lib/x86_64-linux-gnu/libX11.so.6.3.0中）   == 31965 == by 0xB863391：XOpenDisplay（在/usr/lib/x86_64-linux-gnu/libX11.so.6.3.0中）   == 31965 == by 0xD55F095：QXcbConnection :: QXcbConnection（QXcbNativeInterface *，bool，unsigned   int，char const *）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5.7.0）   == 31965 == by 0xD562AEA：QXcbIntegration :: QXcbIntegration（QStringList const＆amp;，int＆amp;，char **）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5.7.0）   == 31965 == by 0xD31D3EA：??? （在/home/lmartin/Qt/5.7/gcc_64/plugins/platforms/libqxcb.so中）   == 31965 == by 0x577041A：QPlatformIntegrationFactory :: create（QString const＆amp;，QStringList const＆amp;，int＆amp;，char **，QString const＆amp;）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Gui.so.5.7.0）   == 31965 == by 0x577D483：QGuiApplicationPrivate :: createPlatformIntegration（）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Gui.so.5.7.0）   == 31965 == by 0x577DF4C：QGuiApplicationPrivate :: createEventDispatcher（）（in   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5Gui.so.5.7.0）   == 31965 == by 0x60A89CC：QCoreApplicationPrivate :: init（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Core.so.5.7.0中）   == 31965 == by 0x577E8EB：QGuiApplicationPrivate :: init（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Gui.so.5.7.0中）   == 31965 == by 0x4F92988：QApplicationPrivate :: init（）（在/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0中）   == 31965 == by 0x402B8D：main（main.cpp：6）   == 31965 ==未初始化的值是由堆栈分配创建的   == 31965 ==在0xD575DB0：非虚拟thunk到QXcbWindow :: setVisible（bool）（在   /home/lmartin/Qt/5.7/gcc_64/lib/libQt5XcbQpa.so.5.7.0）   == == 31965   == 31965 ==（对错误采取行动）vgdb me ...   == 31965 ==继续...... {Memcheck：Param writev（vector [...]）
  OBJ：/lib/x86_64-linux-gnu/libc-2.23.so
  OBJ：/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
  OBJ：/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0
  obj：/usr/lib/x86_64-linux-gnu/libxcb.so.1.1.0 fun：xcb_flush
  乐趣：_ZN10QXcbWindow4hideEv乐趣：_ZN7QWindow10setVisibleEb
  有趣的：_ZN14QWidgetPrivate8hide_sysEv
  有趣的：_ZN14QWidgetPrivate11hide_helperEv
  有趣的：_ZN7QWidget10setVisibleEb
  有趣的：_ZN14QWidgetPrivate12close_helperENS_9CloseModeE
  OBJ：/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0
  OBJ：/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0
  OBJ：/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0
  有趣的：_ZN5QMenu17mouseReleaseEventEP11QMouseEvent
  乐趣：_ZN7QWidget5eventEP6QEvent乐趣：_ZN5QMenu5eventEP6QEvent
  有趣的：_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent
  有趣的：_ZN12QApplication6notifyEP7QObjectP6QEvent
  有趣的：_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent
  好玩的：_ZN19QApplicationPrivate14sendMouseEventEP7QWidgetP11QMouseEventS1_S1_PS1_R8QPointerIS0_Eb   OBJ：/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0
  OBJ：/home/lmartin/Qt/5.7/gcc_64/lib/libQt5Widgets.so.5.7.0
  好玩：_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent}

我怎样才能解决这类问题？

0 个答案:

没有答案
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