c++ - 函数返回期间出现奇怪的段错误

Question

我在两台不同的机器上运行一个程序。在一个上它工作正常没有问题。另一方面，它会导致段错误。通过调试，我找到了故障发生的地方，但我找不到逻辑上的原因。

在一个函数中，我有以下代码:

pass_particles(particle_grid, particle_properties, input_data, coll_eros_track, collision_number_part, world, grid_rank_lookup, grid_locations);
cout<<"done passing particles"<<endl;

函数 pass_particles 如下所示:

void pass_particles(map<int,map<int,Particle> > & particle_grid, std::vector<Particle_props> & particle_properties, User_input& input_data, data_tracking & coll_eros_track, vector<int> & collision_number_part, mpi::communicator & world, std::map<int,int> & grid_rank_lookup, map<int,std::vector<double> > & grid_locations)
{
     //cout<<"east-west"<<endl;
    //east-west exchange (x direction)
    map<int, vector<Particle> > particles_to_be_sent_east;
    map<int, vector<Particle> > particles_to_be_sent_west;
    vector<Particle> particles_received_east;
    vector<Particle> particles_received_west;
    int counter_x_sent=0;
    int counter_x_received=0;
    for(grid_iter=particle_grid.begin();grid_iter!=particle_grid.end();grid_iter++)
    {
        map<int,Particle>::iterator part_iter;
        for (part_iter=grid_iter->second.begin();part_iter!=grid_iter->second.end();)
        {
            if (particle_properties[part_iter->second.global_part_num()].particle_in_box()[grid_iter->first])
            {
                //decide if a particle has left the box...need to consider whether particle was already outside the box 
                if ((part_iter->second.position().x()<(grid_locations[grid_iter->first][0]) && part_iter->second.position().x()>(grid_locations[grid_iter->first-input_data.z_numboxes()][0]))
                    || (input_data.periodic_walls_x() && (grid_iter->first-floor(grid_iter->first/(input_data.xz_numboxes()))*input_data.xz_numboxes()<input_data.z_numboxes()) && (part_iter->second.position().x()>(grid_locations[input_data.total_boxes()-1][0]))))
                {
                    particles_to_be_sent_west[grid_iter->first].push_back(part_iter->second);
                    particle_properties[particle_grid[grid_iter->first][part_iter->first].global_part_num()].particle_in_box()[grid_iter->first]=false;
                    counter_sent++;
                    counter_x_sent++;
                }

                else if ((part_iter->second.position().x()>(grid_locations[grid_iter->first][1]) && part_iter->second.position().x()<(grid_locations[grid_iter->first+input_data.z_numboxes()][1]))
                    || (input_data.periodic_walls_x() && (grid_iter->first-floor(grid_iter->first/(input_data.xz_numboxes()))*input_data.xz_numboxes())>input_data.xz_numboxes()-input_data.z_numboxes()-1) && (part_iter->second.position().x()<(grid_locations[0][1])))
                {
                    particles_to_be_sent_east[grid_iter->first].push_back(part_iter->second);
                    particle_properties[particle_grid[grid_iter->first][part_iter->first].global_part_num()].particle_in_box()[grid_iter->first]=false;
                    counter_sent++;
                    counter_x_sent++;
                }

                //select particles in overlap areas to send to neighboring cells
                else if ((part_iter->second.position().x()>(grid_locations[grid_iter->first][0]) && part_iter->second.position().x()<(grid_locations[grid_iter->first][0]+input_data.diam_large())))
                {
                    particles_to_be_sent_west[grid_iter->first].push_back(part_iter->second);
                    counter_sent++;
                    counter_x_sent++;
                }

                else if ((part_iter->second.position().x()<(grid_locations[grid_iter->first][1]) && part_iter->second.position().x()>(grid_locations[grid_iter->first][1]-input_data.diam_large())))
                {
                    particles_to_be_sent_east[grid_iter->first].push_back(part_iter->second);
                    counter_sent++;
                    counter_x_sent++;
                }
                ++part_iter;
            }
            else if (particles_received_current[grid_iter->first].find(part_iter->first)!=particles_received_current[grid_iter->first].end())
            {
                if ((part_iter->second.position().x()>(grid_locations[grid_iter->first][0]) && part_iter->second.position().x()<(grid_locations[grid_iter->first][0]+input_data.diam_large())))
                {
                    particles_to_be_sent_west[grid_iter->first].push_back(part_iter->second);
                    counter_sent++;
                    counter_x_sent++;
                }

                else if ((part_iter->second.position().x()<(grid_locations[grid_iter->first][1]) && part_iter->second.position().x()>(grid_locations[grid_iter->first][1]-input_data.diam_large())))
                {
                    particles_to_be_sent_east[grid_iter->first].push_back(part_iter->second);
                    counter_sent++;
                    counter_x_sent++;
                }
                part_iter++;
            }
            else
            {
                particle_grid[grid_iter->first].erase(part_iter++);
                counter_removed++;
            }
        }
    }

    world.barrier();

    mpi::request reqs_x_send[particles_to_be_sent_west.size()+particles_to_be_sent_east.size()];
    vector<multimap<int,int> > box_sent_x_info;
    box_sent_x_info.resize(world.size());
    vector<multimap<int,int> > box_received_x_info;
    box_received_x_info.resize(world.size());
    int counter_x_reqs=0;
    //send particles
    for(grid_iter_vec=particles_to_be_sent_west.begin();grid_iter_vec!=particles_to_be_sent_west.end();grid_iter_vec++)
    {
        if (grid_iter_vec->second.size()!=0)
        {
            //send a particle. 50 will be "west" tag
            if (input_data.periodic_walls_x() && (grid_iter_vec->first-floor(grid_iter_vec->first/(input_data.xz_numboxes()))*input_data.xz_numboxes()<input_data.z_numboxes()))
            {
                reqs_x_send[counter_x_reqs++]=world.isend(grid_rank_lookup[grid_iter_vec->first + input_data.z_numboxes()*(input_data.x_numboxes()-1)], grid_iter_vec->first + input_data.z_numboxes()*(input_data.x_numboxes()-1), particles_to_be_sent_west[grid_iter_vec->first]);
                box_sent_x_info[grid_rank_lookup[grid_iter_vec->first + input_data.z_numboxes()*(input_data.x_numboxes()-1)]].insert(pair<int,int>(world.rank(), grid_iter_vec->first + input_data.z_numboxes()*(input_data.x_numboxes()-1)));
            }
            else if (!(grid_iter_vec->first-floor(grid_iter_vec->first/(input_data.xz_numboxes()))*input_data.xz_numboxes()<input_data.z_numboxes()))
            {
                reqs_x_send[counter_x_reqs++]=world.isend(grid_rank_lookup[grid_iter_vec->first - input_data.z_numboxes()], grid_iter_vec->first - input_data.z_numboxes(), particles_to_be_sent_west[grid_iter_vec->first]);
                box_sent_x_info[grid_rank_lookup[grid_iter_vec->first - input_data.z_numboxes()]].insert(pair<int,int>(world.rank(),grid_iter_vec->first - input_data.z_numboxes()));
            }
        }
    }

    for(grid_iter_vec=particles_to_be_sent_east.begin();grid_iter_vec!=particles_to_be_sent_east.end();grid_iter_vec++)
    {
        if (grid_iter_vec->second.size()!=0)
        {
            //send a particle. 60 will be "east" tag
            if (input_data.periodic_walls_x() && (grid_iter_vec->first-floor(grid_iter_vec->first/(input_data.xz_numboxes())*input_data.xz_numboxes())>input_data.xz_numboxes()-input_data.z_numboxes()-1))
            {
                reqs_x_send[counter_x_reqs++]=world.isend(grid_rank_lookup[grid_iter_vec->first - input_data.z_numboxes()*(input_data.x_numboxes()-1)], 2000000000-(grid_iter_vec->first - input_data.z_numboxes()*(input_data.x_numboxes()-1)), particles_to_be_sent_east[grid_iter_vec->first]);
                box_sent_x_info[grid_rank_lookup[grid_iter_vec->first - input_data.z_numboxes()*(input_data.x_numboxes()-1)]].insert(pair<int,int>(world.rank(),2000000000-(grid_iter_vec->first - input_data.z_numboxes()*(input_data.x_numboxes()-1))));
            }
            else if (!(grid_iter_vec->first-floor(grid_iter_vec->first/(input_data.xz_numboxes())*input_data.xz_numboxes())>input_data.xz_numboxes()-input_data.z_numboxes()-1))
            {
                reqs_x_send[counter_x_reqs++]=world.isend(grid_rank_lookup[grid_iter_vec->first + input_data.z_numboxes()], 2000000000-(grid_iter_vec->first + input_data.z_numboxes()), particles_to_be_sent_east[grid_iter_vec->first]);
                box_sent_x_info[grid_rank_lookup[grid_iter_vec->first + input_data.z_numboxes()]].insert(pair<int,int>(world.rank(), 2000000000-(grid_iter_vec->first + input_data.z_numboxes())));
            }
        }
    }

    counter=0;
    for (int i=0;i<world.size();i++)
    {
        //if (world.rank()!=i)
        //{
            reqs[counter++]=world.isend(i,1000000000,box_sent_x_info[i]);
            reqs[counter++]=world.irecv(i,1000000000,box_received_x_info[i]);
        //}
    }

    mpi::wait_all(reqs, reqs + world.size()*2);

    //receive particles
    //receive west particles
    for (int j=0;j<world.size();j++)
    {
        multimap<int,int>::iterator received_info_iter;
        for (received_info_iter=box_received_x_info[j].begin();received_info_iter!=box_received_x_info[j].end();received_info_iter++)
        {
            //receive the message
            if (received_info_iter->second<1000000000)
            {
                //receive the message
                world.recv(received_info_iter->first,received_info_iter->second,particles_received_west);
                //loop through all the received particles and add them to the particle_grid for this processor
                for (unsigned int i=0;i<particles_received_west.size();i++)
                {
                    particle_grid[received_info_iter->second].insert(pair<int,Particle>(particles_received_west[i].global_part_num(),particles_received_west[i]));

                    if(particles_received_west[i].position().x()>grid_locations[received_info_iter->second][0] && particles_received_west[i].position().x()<grid_locations[received_info_iter->second][1])
                    {
                        particle_properties[particles_received_west[i].global_part_num()].particle_in_box()[received_info_iter->second]=true;

                    }
                    counter_received++;
                    counter_x_received++;
                }
            }
            else
            {
                //receive the message
                world.recv(received_info_iter->first,received_info_iter->second,particles_received_east);
                //loop through all the received particles and add them to the particle_grid for this processor
                for (unsigned int i=0;i<particles_received_east.size();i++)
                {
                    particle_grid[2000000000-received_info_iter->second].insert(pair<int,Particle>(particles_received_east[i].global_part_num(),particles_received_east[i]));
                    if(particles_received_east[i].position().x()>grid_locations[2000000000-received_info_iter->second][0] && particles_received_east[i].position().x()<grid_locations[2000000000-received_info_iter->second][1])
                    {
                        particle_properties[particles_received_east[i].global_part_num()].particle_in_box()[2000000000-received_info_iter->second]=true;

                    }
                    counter_received++;
                    counter_x_received++;
                }
            }
        }
    }

    mpi::wait_all(reqs_y_send, reqs_y_send + particles_to_be_sent_bottom.size()+particles_to_be_sent_top.size());
    mpi::wait_all(reqs_z_send, reqs_z_send + particles_to_be_sent_south.size()+particles_to_be_sent_north.size());
    mpi::wait_all(reqs_x_send, reqs_x_send + particles_to_be_sent_west.size()+particles_to_be_sent_east.size());

    cout<<"x sent "<<counter_x_sent<<" and received "<<counter_x_received<<" from rank "<<world.rank()<<endl;

    cout<<"rank "<<world.rank()<<" sent "<<counter_sent<<" and received "<<counter_received<<" and removed "<<counter_removed<<endl;
    cout<<"done passing"<<endl;
}

我只发布了一些代码(所以忽略一些变量可能看起来未定义的事实，因为它们在我没有发布的部分代码中)

当我运行代码时(在它失败的机器上)，我done passing 但不是done passing particles

我不知道什么可能导致被调用函数的末尾和调用函数的下一行之间出现段错误，以及为什么它会发生在一台机器上而不是另一台机器上。

Answer 1

如果您在函数末尾和调用方的后续行之间崩溃，则可能是在局部变量的析构函数中崩溃。您需要在调试器中运行该程序，以查明哪个对象的析构函数正在崩溃。