Question

这是HomeWork

嘿我正在使用Gtkmm作为一个作业，我一直都很好，但是我在一个函数中得到一个奇怪的问题我用来填充TreeView你得到错误

（out：21185）：GLib-ERROR **：/build/buildd/glib2.0-2.32.3/./glib/gmem.c:408：溢出分配3908326912 * 4字节跟踪/断点陷阱（核心转储）

然而奇怪的部分是我使用这个函数为3个单独的TreeViews，它只是在我最近我写的我得到这个错误

我已将问题隔离到行

*m_refTreeModel = Gtk::ListStore::create((*m_columns));

关于如何发生这种情况的任何想法？我的程序相当大，因此显示与此相关的所有源代码将难以上传。但是这条线的功能是

Controller.cpp

#include "Controller.h"
#include "ModelColumns.h"
#include <iostream>

Controller::Controller()
{
    mainMenue = (MainMenueView*) new MainMenueView(this);
    studentMenue = (StudentMenueView*) new StudentMenueView(this);
    degreeMenue = (DegreeMenueView*) new DegreeMenueView(this);
    underGradView = (UnderGradView*) new UnderGradView(this);
    workExpView = (WorkExpView*) new WorkExpView(this);
    relatedCourseView = (RelatedCourseView*) new RelatedCourseView(this);
    tAExpView = (TAExpView*) new TAExpView(this);
    referencesView = (ReferencesView*) new ReferencesView(this);
    gradView = (GradView*) new GradView(this);
    adminMenueView = (AdminMenueView*) new AdminMenueView(this);
    viewPendingAppsMenue = (ViewPendingAppsMenue*) new ViewPendingAppsMenue(this);
    pendingAppsView = (PendingAppsView*) new PendingAppsView(this);
    assignMenueView = (AssignMenueView*) new AssignMenueView(this);
    assignSuccessView = (AssignSuccessView*) new AssignSuccessView(this);
    editLoginView = (EditLoginView*) new EditLoginView(this);
    editAppView = (EditAppView*) new EditAppView(this);

    //Setting up the window
    set_title("");
    set_border_width(10);
    set_default_size(700,400);

    //setting up the notebook
    gui.set_border_width(10);
    gui.set_show_tabs(false);
    add(gui);

    gui.append_page((*mainMenue));
    gui.append_page((*studentMenue));
    gui.append_page((*degreeMenue));
    gui.append_page((*underGradView));
    gui.append_page((*workExpView));
    gui.append_page((*relatedCourseView));
    gui.append_page((*tAExpView));
    gui.append_page((*referencesView));
    gui.append_page((*gradView));
    gui.append_page((*adminMenueView));
    gui.append_page((*viewPendingAppsMenue));
    gui.append_page((*pendingAppsView));
    gui.append_page((*assignMenueView));
    gui.append_page((*assignSuccessView));
    gui.append_page((*editLoginView));  
    gui.append_page((*editAppView));
    show_all_children();

}



Controller::~Controller()
{
delete mainMenue;
delete studentMenue;
delete degreeMenue;
delete underGradView;
delete workExpView;
delete relatedCourseView;
delete tAExpView;
delete referencesView;
delete gradView;
delete adminMenueView;
delete viewPendingAppsMenue;
delete pendingAppsView;
delete assignMenueView;
delete assignSuccessView;
}

void Controller::fillTreeModel(const Glib::ustring &page, const Glib::ustring &type, const Glib::ustring type1)
{
ModelColumns *m_columns;
Gtk::TreeView *m_TreeView;
Glib::RefPtr<Gtk::ListStore> *m_refTreeModel;
std::string temp;
int tempNum;

if (page == "Pending")
{
    m_columns = &(pendingAppsView -> m_columns);
    m_TreeView = &(pendingAppsView -> m_TreeView);
    m_refTreeModel = &(pendingAppsView -> m_refTreeModel);
}
else if (page == "Assign")
{
    m_columns = &(assignSuccessView -> m_columns);
    m_TreeView = &(assignSuccessView -> m_TreeView);
    m_refTreeModel = &(assignSuccessView -> m_refTreeModel);
}
else if (page == "Edit")
{
    m_columns = &(editAppView -> m_columns);
    m_TreeView = &(editAppView -> m_TreeView);
    m_refTreeModel = &(editAppView -> m_refTreeModel);
}



if (type1 == "Pending")
{
    temp = "Pending";
}
if (type1 == "Student")
{
    tempNum = stuNumHold;
}
else
{
    temp = "";
}


//setting up the next page's treeView
if (type == "View All")
{
    model.pendingApps.fillGrads(temp);
    model.pendingApps.fillUnderGrads(temp);
}
else if (type == "Student")
{
    model.pendingApps.fillGrads(tempNum);
    model.pendingApps.fillUnderGrads(tempNum);
//std::cout << "here4" << std::endl;
}
else
{
    std::string tbCourse = Glib::locale_from_utf8(type);
    model.pendingApps.fillGrads(&tbCourse, temp);
    model.pendingApps.fillUnderGrads(&tbCourse, temp);
}

     //std::cout << model.pendingApps.underGrads[0].getStuNum() << "***" << std::endl;

*m_refTreeModel = Gtk::ListStore::create((*m_columns));

    //std::cout << model.pendingApps.underGrads[0].getStuNum() << "***" << std::endl;

(*m_TreeView).set_model((*m_refTreeModel));
Gtk::TreeModel::Row row;

   //std::cout << model.pendingApps.underGrads[0].getStuNum() << "***" << std::endl;

while (model.pendingApps.grads.front() != NULL || model.pendingApps.underGrads.front() != NULL)
{
//std::cout << "here" << std::endl;
    Grad *tempGrad = model.pendingApps.grads.front();
    UnderGrad *tempUnderGrad = model.pendingApps.underGrads.front();

    std::string temp1, temp2;
    if (model.pendingApps.grads.front() != NULL)
    {
        temp1 = (*tempGrad).getCourse();
    }
    if (model.pendingApps.underGrads.front() != NULL)
    {
        temp2 = (*tempUnderGrad).getCourse();
    }

    if (model.pendingApps.underGrads.front() != NULL && type == "View All" && (tempGrad == NULL || strcmp(temp1.c_str(), temp2.c_str()) > 0))
    {
        row = *((*m_refTreeModel) -> append());
        row [m_columns -> m_col_appNum] = (*tempUnderGrad).getAppNum();
        row [m_columns -> m_col_degree] = "Undergraduate";
        row [m_columns -> m_col_course] = (*tempUnderGrad).getCourse(); 
        row [m_columns -> m_col_first] = (*tempUnderGrad).getFName(); 
        row [m_columns -> m_col_last] = (*tempUnderGrad).getLName(); 
        row [m_columns -> m_col_email] = (*tempUnderGrad).getEmail(); 
        row [m_columns -> m_col_major] = (*tempUnderGrad).getMajor(); 
        row [m_columns -> m_col_field] = ""; 
        row [m_columns -> m_col_sup] = ""; 
        row [m_columns -> m_col_stuNum] = (*tempUnderGrad).getStuNum(); 
        row [m_columns -> m_col_year] = (*tempUnderGrad).getYear(); 
        row [m_columns -> m_col_gpa] = (*tempUnderGrad).getGPA(); 
        row [m_columns -> m_col_cGPA] = (*tempUnderGrad).getCGPA();
        row [m_columns -> m_col_app_status] = (*tempUnderGrad).getAppStatus();
        model.pendingApps.underGrads.popFront();


    }
    else if (model.pendingApps.grads.front() != NULL && type == "View All" && (tempUnderGrad == NULL || strcmp(temp1.c_str(), temp2.c_str()) <= 0))
    {
        row = *((*m_refTreeModel) -> append());
        row [m_columns -> m_col_appNum] = (*tempGrad).getAppNum();
        row [m_columns -> m_col_degree] = "Graduate";
        row [m_columns -> m_col_course] = (*tempGrad).getCourse(); 
        row [m_columns -> m_col_first] = (*tempGrad).getFName(); 
        row [m_columns -> m_col_last] = (*tempGrad).getLName(); 
        row [m_columns -> m_col_email] = (*tempGrad).getEmail(); 
        row [m_columns -> m_col_field] = (*tempGrad).getResearch(); 
        row [m_columns -> m_col_sup] = (*tempGrad).getSupervisor();
        row [m_columns -> m_col_stuNum] = (*tempGrad).getStuNum(); 
        row [m_columns -> m_col_app_status] = (*tempGrad).getAppStatus();

        model.pendingApps.grads.popFront();
    }
    else if (model.pendingApps.underGrads.front() != NULL && model.pendingApps.grads.front() != NULL && type != "View All")
    {
        row = *((*m_refTreeModel) -> append());
        row [m_columns -> m_col_appNum] = (*tempGrad).getAppNum();
        row [m_columns -> m_col_degree] = "Graduate";
        row [m_columns -> m_col_course] = (*tempGrad).getCourse(); 
        row [m_columns -> m_col_first] = (*tempGrad).getFName(); 
        row [m_columns -> m_col_last] = (*tempGrad).getLName(); 
        row [m_columns -> m_col_email] = (*tempGrad).getEmail(); 
        row [m_columns -> m_col_field] = (*tempGrad).getResearch(); 
        row [m_columns -> m_col_sup] = (*tempGrad).getSupervisor();
        row [m_columns -> m_col_stuNum] = (*tempGrad).getStuNum(); 
        row [m_columns -> m_col_app_status] = (*tempGrad).getAppStatus();

        model.pendingApps.grads.popFront();
    }
    else
    {

        row = *((*m_refTreeModel) -> append());
        row [m_columns -> m_col_appNum] = (*tempUnderGrad).getAppNum();
        row [m_columns -> m_col_degree] = "Undergraduate";
        row [m_columns -> m_col_course] = (*tempUnderGrad).getCourse(); 
        row [m_columns -> m_col_first] = (*tempUnderGrad).getFName(); 
        row [m_columns -> m_col_last] = (*tempUnderGrad).getLName(); 
        row [m_columns -> m_col_email] = (*tempUnderGrad).getEmail(); 
        row [m_columns -> m_col_major] = (*tempUnderGrad).getMajor(); 
        row [m_columns -> m_col_field] = ""; 
        row [m_columns -> m_col_sup] = ""; 
        row [m_columns -> m_col_stuNum] = (*tempUnderGrad).getStuNum(); 
        row [m_columns -> m_col_year] = (*tempUnderGrad).getYear(); 
        row [m_columns -> m_col_gpa] = (*tempUnderGrad).getGPA(); 
        row [m_columns -> m_col_cGPA] = (*tempUnderGrad).getCGPA();
        row [m_columns -> m_col_app_status] = (*tempUnderGrad).getAppStatus();
        model.pendingApps.underGrads.popFront();
    }
}


}

或者Controller.h

#ifndef CONTROLLER_H
#define CONTROLLER_H

#include <gtkmm.h>

#include "MainMenueView.h"
#include "StudentMenueView.h"
#include "DegreeMenueView.h"
#include "UnderGradView.h"
#include "WorkExpView.h"
#include "RelatedCourseView.h"
#include "TAExpView.h"
#include "ReferencesView.h"
#include "GradView.h"
#include "AdminMenueView.h"
#include "ViewPendingAppsMenue.h"
#include "PendingAppsView.h"
#include "Model.h"
#include "AssignMenueView.h"
#include "AssignSuccessView.h"
#include "EditAppView.h"
#include "EditLoginView.h"

class MainMenueView;
class StudentMenueView;
class DegreeMenueView;
class UnderGradView;
class WorkExpView;
class RelatedCourseView;
class TAExpView;
class ReferencesView;
class GradView;
class AdminMenueView;
class ViewPendingAppsMenue;
class PendingAppsView;
class AssignMenueView;
class AssignSuccessView;
class EditAppView;
class EditLoginView;

 class Controller : public Gtk::Window
{
public:
    Controller();
    virtual ~Controller();
    Gtk::Notebook gui;
    int appNumber, stuNumHold;
    Glib::ustring degreeLevel, courseApplied, searchType;
    Glib::ustring studentMode;

    void fillTreeModel(const Glib::ustring&, const Glib::ustring&, const Glib::ustring);

    Model model;
private:
    MainMenueView *mainMenue; //0
    StudentMenueView *studentMenue; //1
    DegreeMenueView *degreeMenue; //2
    UnderGradView *underGradView; //3
    WorkExpView *workExpView; //4
    RelatedCourseView *relatedCourseView; //5
    TAExpView *tAExpView; //6
    ReferencesView *referencesView;  //7
    GradView *gradView; //8
    AdminMenueView *adminMenueView; //9
    ViewPendingAppsMenue *viewPendingAppsMenue; //10
    PendingAppsView *pendingAppsView; //11
    AssignMenueView *assignMenueView; //12
    AssignSuccessView *assignSuccessView; //13
    EditLoginView *editLoginView; //14
    EditAppView *editAppView; //15
};

#endif

Answer 1

在Controller::fillTreeModel(const Glib::ustring &, const Glib::ustring &, const Glib::ustring)中，如果page不是“待定”，“分配”或“编辑”之一，则m_Columns将永远不会被初始化。我没有查看所有代码，因为它相当长，但如果3908326912无意中（我不确定ModelColumns是什么），这很可能就是问题。

我建议你有一个默认情况，要么分配默认的回退值，要么抛出异常。

跟踪/断点陷阱（核心转储）Gtkmm

1 个答案: