Qt 随机双自由或损坏错误
出于某种原因,我正在用QT编写一个程序。在一段代码中,有时我会得到双重免费或损坏错误,但不是在100%的情况下。例如,我按下按钮时会执行以下代码:Qt 随机双自由或损坏错误,qt,memory-management,Qt,Memory Management,出于某种原因,我正在用QT编写一个程序。在一段代码中,有时我会得到双重免费或损坏错误,但不是在100%的情况下。例如,我按下按钮时会执行以下代码: void manureman::on_BitBtn3_clicked() { mnrmanothprods *otherprods = new mnrmanothprods(this,database,currentSystem); moduleSubScreen m_dialogWindow; m_dialogWindow.
void manureman::on_BitBtn3_clicked()
{
mnrmanothprods *otherprods = new mnrmanothprods(this,database,currentSystem);
moduleSubScreen m_dialogWindow;
m_dialogWindow.loadSubScreen(otherprods);
m_dialogWindow.setWindowTitle("Purchased products for manure management");
qDebug() << "Loading window";
m_dialogWindow.exec();
qDebug() << "After loading window";
qDebug() << "Exiting";
}
moduleSubScreen类仅将mnrMothProds添加到具有以下内容的布局:
void moduleSubScreen::loadSubScreen(impgenmaint *child)
{
m_child = child;
connect(m_child,SIGNAL(closeCalled()),this,SLOT(close()));
ui->MainLayout->addWidget(child);
}
我将调试信息放入类的每个析构函数中,因此在关闭对话框后,通常会得到:
Debug: After loading window
Debug: Exiting
Debug: Before destroy moduleSubScreen UI
Debug: After destroy moduleSubScreen UI
Debug: After m_child = 0
Debug: Before destroy mnrmanothprods UI
Debug: After destroy mnrmanothprods UI
Debug: Destroy: fieldInColModel
Debug: Destroy imageCheckDelegate
Debug: Destroy: periodTableModel
Debug: Destroy imageCheckDelegate
然而,有时我会随机地在调试的一部分中出现双重删除错误:
Debug: After loading window
Debug: Exiting
Debug: Before destroy moduleSubScreen UI
Debug: After destroy moduleSubScreen UI
Debug: After m_child = 0
Debug: Before destroy mnrmanothprods UI
Debug: After destroy mnrmanothprods UI
Debug: Destroy: fieldInColModel
你知道我该怎么做才能抓住虫子吗。。。或者为什么这样的错误不会一直发生
谢谢。
卡洛斯你可以用一个工具来帮助他。像这样的东西通常很擅长找到这类东西。Hi,我用valgrind运行了它--leak check=full--log file=./mleaks.log./myprogram。。。但除了在一段不相关的代码中出现2次小内存泄漏外,我没有收到任何重大错误。。。。我认为Valgrind无法跟踪它,所以我在通常发生碰撞的同一行中创建了一个控制问题,Valgrind显示了控制问题。。。现在。。我是瞎子!:-(可能的副本)
Debug: After loading window
Debug: Exiting
Debug: Before destroy moduleSubScreen UI
Debug: After destroy moduleSubScreen UI
Debug: After m_child = 0
Debug: Before destroy mnrmanothprods UI
Debug: After destroy mnrmanothprods UI
Debug: Destroy: fieldInColModel