Re: How to use -dbg packages (and specifically libncurses5-dbg) ?

[Frédéric Boiteux <fboiteux@calistel.com>]

    Hello Timo,

Le 15/09/2010 12:52, Timo Juhani Lindfors a écrit :
> Frédéric Boiteux <fboiteux@calistel.com> writes:
>   
>> Does I have to redo the compilation before to test my program with
>> libncurses5-dbg debug library ?
>>     
> No. libncurses5-dbg is not a library, it does not even contain
> code. It only contains the debugging symbols that were removed from
> libncurses5.
>   
Yes, I'd like to use these debugging symbols, but don't have them
available in my gdb session.

> At least the following works for me:
>
> 0) sudo aptitude install libncursesw5-dbg
> 1) start nano
> 2) start gdb
> 3) shell pidof nano
> 4) attach <that pid>
> 5) bt
>
> #0  0x00007f0d65f47ea0 in __read_nocancel () at ../sysdeps/unix/syscall-template.S:82
> #1  0x00007f0d6620283a in fifo_push (win=0x8f1f90, result=<value optimized out>, use_meta=<value optimized out>) at /home/csmall/debian/ncurses/ncurses/ncurses/base/lib_getch.c:275
> #2  kgetch (win=0x8f1f90, result=<value optimized out>, use_meta=<value optimized out>) at /home/csmall/debian/ncurses/ncurses/ncurses/base/lib_getch.c:669
> #3  _nc_wgetch (win=0x8f1f90, result=<value optimized out>, use_meta=<value optimized out>) at /home/csmall/debian/ncurses/ncurses/ncurses/base/lib_getch.c:500
> #4  0x00007f0d66202fe7 in wgetch (win=0x8f1f90) at /home/csmall/debian/ncurses/ncurses/ncurses/base/lib_getch.c:630
> #5  0x0000000000421f40 in ?? ()
> #6  0x0000000000422115 in ?? ()
> #7  0x00000000004223ed in ?? ()
> #8  0x0000000000422a96 in ?? ()
> #9  0x000000000041217d in ?? ()
> #10 0x0000000000412d5c in ?? ()
> #11 0x00007f0d65ea3c4d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>,
>     rtld_fini=<value optimized out>, stack_end=0x7fff819c90a8) at libc-start.c:228
> #12 0x0000000000403789 in ?? ()
> #13 0x00007fff819c90a8 in ?? ()
> #14 0x000000000000001c in ?? ()
> #15 0x0000000000000001 in ?? ()
> #16 0x00007fff819ca7f8 in ?? ()
> #17 0x0000000000000000 in ?? ()
>
>   
It's what I would like to have, but in my gdb session, the symbols /
data aren't available. When you start your gdb, do you have some info
about gdb loading libncurses5 debugging symbols ?

   regards,
        Fred.