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ddd




SYNOPSIS

       ddd    [--help] [--gdb] [--dbx] [--ladebug] [--wdb]
              [--xdb] [--jdb] [--pydb] [--perl] [--debugger name]
              [--[r]host [username@]hostname]] [--trace] [--ver­
              sion] [--configuration] [options...]
              [prog[core|procID]]

       but usually just

       ddd    program


DESCRIPTION

       DDD  is  a  graphical front-end for GDB and other command-
       line debuggers.  Using DDD, you can see what is  going  on
       "inside"   another  program  while  it  executes--or  what
       another program was doing at the moment it crashed.

       DDD can do four main kinds of things (plus other things in
       support of these) to help you catch bugs in the act:

       · Start  your  program,  specifying  anything  that  might
         affect its behavior.

       · Make your program stop on specified conditions.

       · Examine  what  has  happened,  when  your  program   has
         stopped.

       · Change  things  in  your  program, so you can experiment
         with correcting the effects of one  bug  and  go  on  to
         learn about another.

       "Classical"  UNIX debuggers such as the GNU debugger (GDB)
       provide a command-line interface and a multitude  of  com­
       mands  for  these  and other debugging purposes.  DDD is a
       comfortable graphical user interface  around  an  inferior
       GDB,  DBX,  Ladebug,  XDB,  JDB,  Python debugger, or Perl
       debugger.

       DDD is invoked with the shell command ddd.  You can open a
       program  to  be  debugged  using `File->Open Program' (the
       `Open Program' item in  the  `File'  menu.   You  can  get
       online  help  at  any  time using the `Help' menu; for the
       first  steps,  try  `Help->What  Now?'.   Quit  DDD  using
       `File->Exit'.

       More  information  on  DDD is contained in the DDD Manual.
       You can read the text-only version in DDD (via  `Help->DDD
       Reference')  or  in  Emacs  (as  Info file).  Full-fledged
       HTML, PostScript, and PDF versions  are  available  online
       via the DDD WWW page,
       option listed here, use the `--debugger' option, below.

       --configuration
              Show the DDD configuration settings and exit.

       --dbx  Run the DBX debugger as inferior debugger.

       --debugger name
              Invoke the inferior debugger name.  This is  useful
              if you have several debugger versions around, or if
              the inferior debugger cannot be invoked  as  `gdb',
              `dbx',  `xdb',  `jdb',  `pydb',  or  `perl' respec­
              tively.
              This option can also be used to pass options to the
              inferior  debugger  that  would  otherwise conflict
              with DDD options.  For instance, to pass the option
              `-d directory' to XDB, use:

                ddd --debugger "xdb -d directory"

              If  you  use  the `--debugger' option, be sure that
              the type of inferior debugger is specified as well.
              That  is,  use one of the options `--gdb', `--dbx',
              `--xdb', `--jdb' `--pydb', or `--perl' (unless  the
              default setting works fine).

       --gdb  Run the GDB debugger as inferior debugger.

       --help Give  a  list  of  frequently  used  options.  Show
              options of the inferior debugger as well.

       --host [username@]hostname
              Invoke the inferior debugger directly on the remote
              host  hostname.   If  username  is  given  and  the
              `--login' option  is  not  used,  use  username  as
              remote user name.

       --jdb  Run JDB as inferior debugger.

       --ladebug
              Run Ladebug as inferior debugger.

       --perl Run Perl as inferior debugger.

       --pydb Run PYDB as inferior debugger.

       --rhost [username@]hostname
              Run  the  inferior  debugger  interactively  on the
              remote host hostname.  If username is given and the
              `--login'  option  is  not  used,  use  username as
              remote user name.

       A full list of options, including important options of the
       inferior debugger, can be found in the DDD manual.


SEE ALSO

       X(1), gdb(1), dbx(1), wdb(1), xdb(1), perldebug(1)

       `ddd' entry in info.

       `gdb' entry in info.

       Debugging  with DDD: User's Guide and Reference Manual, by
       Andreas Zeller.

       Using GDB: A Guide to the GNU  Source-Level  Debugger,  by
       Richard M. Stallman and Roland H. Pesch.

       Java  Language Debugging, at http://java.sun.com/ (and its
       mirrors) in /products/jdk/1.1/debugging/

       The Python Language,  at  http://www.python.org/  and  its
       mirrors.

       DDD--A  Free  Graphical  Front-End  for UNIX Debuggers, by
       Andreas Zeller and Dorothea Luetkehaus,  Computer  Science
       Report  95-07, Technische Universitaet Braunschweig, 1995.

       DDD - ein Debugger mit  graphischer  Datendarstellung,  by
       Dorothea  Luetkehaus, Diploma Thesis, Technische Universi­
       taet Braunschweig, 1994.

       The DDD FTP site,

         ftp://ftp.gnu.org/

       The DDD WWW page,

         http://www.gnu.org/software/ddd/

       The DDD Mailing List,

          ddd@gnu.org

       For more information on this list, send a mail to

          ddd-request@gnu.org .


COPYRIGHT

       of this manual page into another language, under the above
       conditions for modified versions, except that this permis­
       sion notice may be included in  translations  approved  by
       the  Free  Software  Foundation instead of in the original
       English.

DDD 3.3.7                   2001-01-15                     ddd(1)

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