Conference turris::decladebug

901.0. "hung on unix 4.0b" by MLNCSC::VOCI () Thu Mar 27 1997 10:56

    Hello,
    
    on Digital Unix 4.0, the following program hungs when input is
    required.
    
    I see the output "Dammi il numero:", at the next step dxladebug hangs,
    I can telnet on the system with no problem, everything else works fine.
    
    If I step through the program with dbx or ladebug (no GUI interface),
    everything works fine.
    
    I'm using CDE.
    
    Steps to reproduce the problem:
    - choose ladebug from the 'Application Manager - Developers_Toolkit'
    - on the window 'Action: Ladebug' don't specify the name and click on
      the OK button
    - on the window 'Ladebug Debugger' open the 'File' menu and select 'Run
      new program', specify the program name (EX: quadrato)
    - when you step after the scanf command ladebug hungs
    
    This is the output of 'ps x | grep debug':
    
     7826 ??       I        0:01.61 dtterm -title Ladebug -e
    /usr/dt/bin/dtexec -open 3 -ttprocid 3.nLdgD 01 2465 1342177279 1 0 200
    16.192.80.55 3_112_1 /bin/sh -c if [ -f /usr/.smdb./OSFLDBGUI*.lk ];
    then /usr/bin/X11/dxladebug ; else /usr/bin/show_uninstalled_info
    /usr/doc/ladebug_uninstalled_info.txt "Ladebug Debugger";fi
     7835 ttyp4    S  +     0:00.03 grep debug
     7822 ttype    IW +     0:00.34 /usr/dt/bin/dtexec -open 3 -ttprocid
    3.nLdgD 01 2465 1342177279 1 0 200 16.192.80.55 3_112_1 /bin/sh -c if [
    -f /usr/.smdb./OSFLDBGUI*.lk ]; then /usr/bin/X11/dxladebug ; else
    /usr/bin/show_uninstalled_info /usr/doc/ladebug_uninstalled_info.txt
    "Ladebug Debugger";fi
     7830 ttype    S  +     0:04.74 /usr/bin/X11/dxladebug
     7831 ttype    IW +     0:00.05 /bin/sh -c if [ -f
    /usr/.smdb./OSFLDBGUI*.lk ]; then /usr/bin/X11/dxladebug ; else
    /usr/bin/show_uninstalled_info /usr/doc/ladebug_uninstalled_info.txt
    "Ladebug Debugger";fi
     7836 ttype    T        0:10.89 /usr/bin/ladebug -read_only prompt
    -apiui /usr/users/gea/linguaggi/c/quadrato
    
    There is no manual workaround than killing the processes.
    
    The variable db_enable in the kernel is set to 0.
    
    Example program:
    
    #include <stdio.h>
    #include <math.h>
    
    main()
    {
            float a=0, b=0;
    
            printf ("Dammi il numero: ");
            scanf("%f", &a);
    
            b=pow(a,2.F);
            printf(" risultato: %f\n", b);
    }
    
    Any idea is wellcome!
    
    Thanks,
    Gea
                                                                        

Gea,

Use the -iow option with dxladebug.  The debugger will pop up a separate window
in which you do your input and output.

-Chris