Re: gdbserver coredumps,what is the *right* libthread_db.so for gdbserver on a given platform?

Re: gdbserver coredumps,what is the *right* libthread_db.so for gdbserver on a given platform?

[John Utz]

Hi again, more informatoin....

>>> Daniel Jacobowitz <drow@mvista.com> 01/23/04 02:50PM >>>
> If it's still segfaulting you've found a new or unique problem. 
You'll
> have to figure out what gdbserver is doing :)

ok, so here's a slight improvement, but still weird...hope that it
might jog your brain....

if i take my libpthread-0.9.so and copy it to libpthread-0.9.so.db and
then *strip* libpthread-0.9.so i can run  'share' successfully, ie not
crash gdbserver.

that's good.

of course, this means that i have no symbols for libpthread-0.9.so.

But, better yet. i can do an add-symbol-file on the
libpthread-0.9.so.db and *not* crash gdbserver and get symbols for
libpthread-0.9.so!!

But, the bad news is that i then get a noncrashing error from gdbserver
when i do this:

gdb: Unable to set global thread event mask: generic error

then, if i step thru my sample thread app i suddenly get an apparent
infinite loop of something..i think, because i get a SIGSEV.

when i do a bt it
shows that i am in longjmp:
#0 0x4001a3c2 in longjmp
#1 0xffffffff in ?? ()
<...>
#4345 0xffffffff in ?? ()
#4346 0xffffffff in ?? ()
#4347 0xffffffff in ?? ()
<...> and on and on until i reboot the target...

does this collection of facts provide any additional insight?

failing that, how do i debug gdsbserver?

tnx!

johnu

show os

[MuthuKumar]

hello all,

 I am using gdb of
(gdb) show vers
HP gdb 4.0 for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 4.0 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.

If i put the command as show os it is showing only as 
(gdb) show os
Operating system is "".

what is the problem with this.

Regards,
Muthukumar.

Re: show os

[Eli Zaretskii]

> From: "MuthuKumar" <kmuthu_linux@HotPOP.com>
> Date: Sat, 24 Jan 2004 16:06:17 +0530
> 
> If i put the command as show os it is showing only as 
> (gdb) show os
> Operating system is "".
> 
> what is the problem with this.

There are 2 problems:

  (1) you need to say "set os <something>" before "show os" could
      tell something useful; and

  (2) the GDB manual fails to index "show os" and "set os".

In other words, "show os" only works on systems that support KOD, the
Kernel Object Display interface.  See the section "KOD" in the GDB
manual for more details.

I'll fix problem (2) above ASAP.  Thanks for bringing this to our
attention.