From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-return-19292-listarch-gdb=sources.redhat.com@sources.redhat.com>
Received: (qmail 4451 invoked by alias); 31 Aug 2004 16:07:59 -0000
Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm
Precedence: bulk
List-Subscribe: <mailto:gdb-subscribe@sources.redhat.com>
List-Archive: <http://sources.redhat.com/ml/gdb/>
List-Post: <mailto:gdb@sources.redhat.com>
List-Help: <mailto:gdb-help@sources.redhat.com>, <http://sources.redhat.com/ml/#faqs>
Sender: gdb-owner@sources.redhat.com
Received: (qmail 4430 invoked from network); 31 Aug 2004 16:07:57 -0000
Received: from unknown (HELO foon.sendmail.com) (209.246.26.40)
  by sourceware.org with SMTP; 31 Aug 2004 16:07:57 -0000
Received: from [10.210.112.140] ([10.210.112.140])
	(authenticated bits=0)
	by foon.sendmail.com (Switch-3.1.6/Switch-3.1.6) with ESMTP id i7VG7tEC000378
	(version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=OK);
	Tue, 31 Aug 2004 09:07:55 -0700
Message-ID: <4134A25C.4020700@sendmail.com>
Date: Tue, 31 Aug 2004 16:07:00 -0000
From: Chris Markle <cmarkle@sendmail.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.2) Gecko/20040803
MIME-Version: 1.0
To: Michael Chastain <mec.gnu@mindspring.com>
CC: gdb@sources.redhat.com
Subject: Re: calling glibc mallinfo() from GDB after attaching to a process?
References: <4133DDC2.3040403@sendmail.com> <01c48f0e$Blat.v2.2.2$c9e5a100@zahav.net.il> <41340BA3.6020801@sendmail.com> <4134975D.nailH9511JUUH@mindspring.com>
In-Reply-To: <4134975D.nailH9511JUUH@mindspring.com>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-SW-Source: 2004-08/txt/msg00439.txt.bz2

Michael,

Thanks mucho for your excellent reply...

> That way, you're calling a function in your program instead of
> a shared library, and the function returns an int rather than
> a struct.  Both of these things make gdb work better, and avoid
> errors like this:
> 
>   (gdb) print mallinfo()
> 
>   Program received signal SIGSEGV, Segmentation fault.
>   0x4207512d in mallinfo () from /lib/i686/libc.so.6
>   The program being debugged was signaled while in a function called from GDB.
>   GDB remains in the frame where the signal was received.
>   To change this behavior use "set unwindonsignal on"
>   Evaluation of the expression containing the function (mallinfo) will be abandoned.

I am getting exactly this seg fault when calling mallinfo(). Do later 
versions of gdb deal better with this?

Chris