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content-class: urn:content-classes:message
Subject: RE: Strange GDB behavior
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Date: Mon, 26 Jul 2004 12:09:00 -0000
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From: "Atul Talesara" <atul.talesara@nevisnetworks.com>
To: <gdb@sources.redhat.com>
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>From your following command it is evident that "bnp" is a pointer to a
>structure.=20
>
>>(gdb) p *bnp
>>$1 =3D {egp_next =3D 0x0, egp_sort_next =3D 0x0, egp_group =3D 0x82a45ef0,
>>  egp_flags =3D 138412032, egp_hisrcvdcaps =3D 0, egp_hiscaps =3D 0,
egp_conf
>=3D {
>>      action =3D 0 '\000'}, egpc_peer_as =3D 0, egpc_description =3D 0x0,
>>as_count
>>=3D 0,
>>    ---Type <return> to continue, or q <return> to quit---q
>>Quit
>
>
> Hence I think this statement is incorrect=20
>> (gdb) p *bnp->as_count
*bnp->as_count is equivalent to *(bnp->as_count).
This will take the value of as_count and try to
dereference it, and you should typically get an error
something like "Cannot access memory at address 0x..."
and not "There is no member named ..."  Nonetheless
*bnp->as_count won't give you desired value.

>
>It should be=20
>
>(gdb) p bnp->as_count
Or equivalently:
p (*bnp).as_count

Regards,
Atul P Talesara=20
----------------------------------------------------------=20
Be not afraid of life. Believe that life is worth living,
and your belief will help create the fact."
                                            - Henry James
----------------------------------------------------------