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Problem with disassembler and SIGILL signal

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  • mrjjM Offline
    mrjjM Offline
    mrjj
    Lifetime Qt Champion
    wrote on last edited by
    #45

    Its impossible to say
    But global variables are good candidate to be check. (always)

    I dont think
    static const QString path;
    can give such error.

    1 Reply Last reply
    0
    • A Offline
      A Offline
      Amaury
      wrote on last edited by
      #46

      Thank you I was a little disapointed by this function and wasn't able to say if that was correct or not

      mrjjM kshegunovK 2 Replies Last reply
      0
      • A Amaury

        Thank you I was a little disapointed by this function and wasn't able to say if that was correct or not

        mrjjM Offline
        mrjjM Offline
        mrjj
        Lifetime Qt Champion
        wrote on last edited by
        #47

        @Amaury
        Well you can always single step it and see if something happens.

        1 Reply Last reply
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        • A Amaury

          Thank you I was a little disapointed by this function and wasn't able to say if that was correct or not

          kshegunovK Offline
          kshegunovK Offline
          kshegunov
          Moderators
          wrote on last edited by
          #48

          @Amaury
          Also you can cut the code that you suspect and see if the problem manifest itself. I wouldn't in principle initialize anything outside of main (like your database) if I can help it, that way I stumble on to less errors in my code, and thus makes for an easier time debugging. Still, my best guess is there some subtle architecture mismatch, so the compiler generates a mostly valid code. However I have no clue how to really test that at present.

          Read and abide by the Qt Code of Conduct

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          • A Offline
            A Offline
            Amaury
            wrote on last edited by Amaury
            #49

            By using step I can't see any bugs so that's not here.

            By the way I'm using the memory check Valgind through QT and when I do a memory check thats starting but I got this message after a few seconds :

            Analyzing memory of /home/pi/Desktop/SmartDevice/SauvegardeRASPI/New/build-SmartDevice_QT_V11-Desktop-Debug/SmartDevice_QT_V11
                <frame>
                  <ip>0x485F6F0</ip>
                  <obj>/usr/lib/arm-linux-gnueabihf/libarmmem.so</obj>
                </frame>
              </stack>
            Analyzing finished.
            ** Unknown error **
            

            I followed the steps here :
            http://doc.qt.io/qtcreator/creator-valgrind-overview.html
            http://doc.qt.io/qtcreator/creator-analyzer.html

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            • A Offline
              A Offline
              Amaury
              wrote on last edited by
              #50

              @kshegunov
              If I don't declare it there where could I do it ? As said before that's not a code that I did myself and I don't really understand the way that it works (how the "path" is used thorugh the different pages ...

              kshegunovK 1 Reply Last reply
              0
              • A Amaury

                @kshegunov
                If I don't declare it there where could I do it ? As said before that's not a code that I did myself and I don't really understand the way that it works (how the "path" is used thorugh the different pages ...

                kshegunovK Offline
                kshegunovK Offline
                kshegunov
                Moderators
                wrote on last edited by
                #51

                @Amaury said in Problem with disassembler and SIGILL signal:

                If I don't declare it there where could I do it

                From the looks of it you can safely put the db initialization in main (after you've created the application object). As for the string, it's okay to leave it as a global.

                Read and abide by the Qt Code of Conduct

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                • A Offline
                  A Offline
                  Amaury
                  wrote on last edited by Amaury
                  #52

                  @kshegunov

                  I tried like that but that doesn't work got a qualified-id in declaration before '(' token error

                  static const QString path = "localhost";
                  
                  int main(int argc, char *argv[])
                  {
                      QApplication a(argc, argv);
                      DataBase MemTampon::Db(path);
                  .
                  .
                  .
                  }
                  

                  Even with the string inside the main ...

                  kshegunovK 1 Reply Last reply
                  0
                  • A Amaury

                    @kshegunov

                    I tried like that but that doesn't work got a qualified-id in declaration before '(' token error

                    static const QString path = "localhost";
                    
                    int main(int argc, char *argv[])
                    {
                        QApplication a(argc, argv);
                        DataBase MemTampon::Db(path);
                    .
                    .
                    .
                    }
                    

                    Even with the string inside the main ...

                    kshegunovK Offline
                    kshegunovK Offline
                    kshegunov
                    Moderators
                    wrote on last edited by
                    #53

                    It should be:

                    DataBase Db(path);
                    

                    You're not initializing a static anymore.

                    Read and abide by the Qt Code of Conduct

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                    • A Offline
                      A Offline
                      Amaury
                      wrote on last edited by Amaury
                      #54

                      The problem is if I don't use a static I can't do the calls for my other functions in my Database class..

                      const QString path = "localhost";
                      
                      int main(int argc, char *argv[])
                      {
                      
                          QApplication a(argc, argv);
                      
                      
                          QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
                          QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
                      
                          QTranslator *qtTranslator = new QTranslator;
                              qtTranslator->load("qt_" + QLocale::system().name(), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
                              a.installTranslator(qtTranslator);
                      
                              DataBase Db(path);
                              DataBase::Db.aff_Temperature();
                              DataBase::Db.aff_Humidite();
                              DataBase::Db.aff_Puissance();
                              DataBase::Db.aff_Nom_SD();
                      
                          MainWindow w;
                          w.show();
                      
                      
                          return a.exec();
                      }
                      

                      (By the way I've delete the MemTampon that I agree was useless ... )

                      EDIT : My bad I'm dumb I think ^^ for the main it's alright just had to cut out the "DataBase::"

                      But I'm doing reference to the "Db" inside another page but the call doesn't work...

                       if (Db.isOpen())
                          {
                      
                              Temp  = Db.aff_Temperature();
                              Humid  = Db.aff_Humidite();
                              Puiss  = Db.aff_Puissance();
                              Nom = Db.aff_Nom_SD();
                              Axe_X = Db.aff_AxeX();
                              Axe_Y = Db.aff_AxeY();
                              Axe_Z = Db.aff_AxeZ();
                      
                      
                      kshegunovK 1 Reply Last reply
                      0
                      • A Amaury

                        The problem is if I don't use a static I can't do the calls for my other functions in my Database class..

                        const QString path = "localhost";
                        
                        int main(int argc, char *argv[])
                        {
                        
                            QApplication a(argc, argv);
                        
                        
                            QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
                            QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
                        
                            QTranslator *qtTranslator = new QTranslator;
                                qtTranslator->load("qt_" + QLocale::system().name(), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
                                a.installTranslator(qtTranslator);
                        
                                DataBase Db(path);
                                DataBase::Db.aff_Temperature();
                                DataBase::Db.aff_Humidite();
                                DataBase::Db.aff_Puissance();
                                DataBase::Db.aff_Nom_SD();
                        
                            MainWindow w;
                            w.show();
                        
                        
                            return a.exec();
                        }
                        

                        (By the way I've delete the MemTampon that I agree was useless ... )

                        EDIT : My bad I'm dumb I think ^^ for the main it's alright just had to cut out the "DataBase::"

                        But I'm doing reference to the "Db" inside another page but the call doesn't work...

                         if (Db.isOpen())
                            {
                        
                                Temp  = Db.aff_Temperature();
                                Humid  = Db.aff_Humidite();
                                Puiss  = Db.aff_Puissance();
                                Nom = Db.aff_Nom_SD();
                                Axe_X = Db.aff_AxeX();
                                Axe_Y = Db.aff_AxeY();
                                Axe_Z = Db.aff_AxeZ();
                        
                        
                        kshegunovK Offline
                        kshegunovK Offline
                        kshegunov
                        Moderators
                        wrote on last edited by kshegunov
                        #55

                        @Amaury said in Problem with disassembler and SIGILL signal:

                        if I don't use a static I can't do the calls for my other functions in my Database class..

                        Why not, you can always get the opened database (it's default named) by calling QSqlDatabase db = QSqlDatabase::database(). The QSqlDatabase class already keeps track of the opened connections for you.

                        Read and abide by the Qt Code of Conduct

                        1 Reply Last reply
                        1
                        • A Offline
                          A Offline
                          Amaury
                          wrote on last edited by Amaury
                          #56

                          So what you mean is that for now my function Database Db(path) is just to specify if the connection is opened or not ?

                          kshegunovK 1 Reply Last reply
                          0
                          • A Amaury

                            So what you mean is that for now my function Database Db(path) is just to specify if the connection is opened or not ?

                            kshegunovK Offline
                            kshegunovK Offline
                            kshegunov
                            Moderators
                            wrote on last edited by
                            #57

                            @Amaury
                            Eh, yes I suppose you could say that, currently in the constructor of your object you open the database:

                            db = QSqlDatabase::addDatabase("QMYSQL");
                            db.setHostName("localhost");
                            // ...
                            

                            so it serves as database initialization. You can do that in main() too, but that's another point. After the constructor's run, you can get the opened database the way I mentioned in my previous post. In principle it's not really needed to have a "database manager" with Qt, because the QSqlDatabase class already keeps track of the connections, as mentioned. You can look up the two functions QSqlDatabase::addDatabase and QSqlDatabase::database in the docs and I think it'll become clear from the examples there.

                            Read and abide by the Qt Code of Conduct

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                            • A Offline
                              A Offline
                              Amaury
                              wrote on last edited by
                              #58

                              Alright I'm going to check and change some things to see if that deletes the Sigill signal (hope so) I come back to give you feedback.

                              Thanks !

                              1 Reply Last reply
                              0
                              • A Offline
                                A Offline
                                Amaury
                                wrote on last edited by
                                #59

                                Hi there ,

                                I'm back again for some feedback , I changed the way I use my Database, I'm still connecting the same way, But all my functions that were in my class get swith into the only page that need those instructions .
                                That Way I Just connect through my databse page and just make a Signal Slot use when I need it.

                                That said , my problem isn't solve for now I though maybe it was the Databse but seems not , maybe it's my refresh timer for my UI that creates crashes , anyway I'm still triying to find the problem..

                                If anyone could give me a clue for Valgrind to work , it's crashing a few seconds after starting the analysis and I just have the message that I post earlier.

                                That's a big post thank's for help and if I can't get in touch happy Christmas holidays.

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