DWARF problem - newbie question
Lev Assinovsky
LAssinovsky@algorithm.aelita.com
Tue May 6 08:15:00 GMT 2003
Seems, you didn't read my latest post.
The matter is I made a mistake
compiling task.
It was -g -g3 -gdwarf-2.
With -g3 -gdwarf-2
"info macro M" works.
What else can I have with dwarf-2.
Can I step in macro and see it's content on the screen?
----
Lev Assinovsky
Aelita Software Corporation
O&S Core Division, Programmer
ICQ# 165072909
> -----Original Message-----
> From: Jim Blandy [mailto:jimb@redhat.com]
> Sent: Monday, May 05, 2003 9:39 PM
> To: Lev Assinovsky
> Cc: gdb@sources.redhat.com
> Subject: Re: DWARF problem - newbie question
>
>
>
> Okay --- so, did you compile with -g3? Does readelf -S show a
> ".debug_macinfo" section?
>
> "Lev Assinovsky" <LAssinovsky@algorithm.aelita.com> writes:
>
> > Nop, I do see .debug_info but don't see .stab
> > gdb command "info macro M"
> > still complains.
> > My platform is Solaris 8 Intel.
> >
> > Thanks,
> > ----
> > Lev Assinovsky
> > Aelita Software Corporation
> > O&S Core Division, Programmer
> > ICQ# 165072909
> >
> >
> > > -----Original Message-----
> > > From: Jim Blandy [mailto:jimb@redhat.com]
> > > Sent: Friday, May 02, 2003 3:30 AM
> > > To: Lev Assinovsky
> > > Cc: gdb@sources.redhat.com
> > > Subject: Re: DWARF problem - newbie question
> > >
> > >
> > >
> > > "Lev Assinovsky" <LAssinovsky@algorithm.aelita.com> writes:
> > >
> > > > Hi!
> > > > I use gcc 3.2 and gdb+dejagnu-20030228.
> > > > Compile my code with -ggdb option which promises
> > > > the most expressive extra debug info.
> > > > But when in gdb I request ""
> > > > I get:
> > > > GDB has no preprocessor macro information for that code, though
> > > > I do have macro M defined in my source.
> > > >
> > > > What am I doing wrong?
> > >
> > > At the moment, to get macro information, you need to:
> > > - use the Dwarf 2 debugging format, and
> > > - pass GCC the -g3 flag, to ask it to include macro information.
> > >
> > > You don't say which platform you're using. On
> i686-pc-linux-gnu, GCC
> > > 3.2 defaults to using Dwarf 2. You can check for sure by running
> > > 'readelf -S foo.o' on one of your .o files, compiled with
> plain -g:
> > > - If it has a section named '.debug_info', then that's Dwarf 2.
> > > - If it has a section named '.stab', then that's STABS.
> > >
> > > If Dwarf 2 isn't the default, then you can request it
> with -gdwarf-2.
> > > So altogether, you'd need to say '-gdwarf-2 -g3'.
> > >
> > > I don't really know how -ggdb decides which format is 'the most
> > > expressive'. I think it's better to spell out what you
> want than to
> > > use that flag.
> > >
>
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