X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Message-ID: <4704CA0F.9010907@udc.es>
Date: Thu, 04 Oct 2007 13:10:07 +0200
From: Alberto Luaces <aluaces AT udc DOT es>
User-Agent: Thunderbird 1.5.0.13 (Windows/20070809)
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Debugging with cygwin tools
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 8bit
X-IsSubscribed: yes
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

Hello,

I am just starting to learn how to use the debugging tools available in
Cygwin. To do so, I have a test program deliberately designed to crash:

#include <iostream>

int main()
{
         int *p=0;

         *p=9;

         return 0;
}

I have compiled it with debugging information:

g++ -g -O0 -o core core.cpp

Then I try to run it with gdb:

gdb core.exe

(gdb) b main
Breakpoint 1 at 0x401175: file core.cpp, line 4.
(gdb) r
Starting program: /home/Demostración/testsC++/core.exe
Error: dll starting at 0x77d41000 not found.
Segmentation fault (core dumped)

As seen, gdb crashes without even start the program.

Then, I am trying to get a core dump:

$ export CYGWIN=error_start=c:\\cygwin\\bin\\dumper.exe
$ ./core
*** starting debugger for pid 2664, tid 544

but the program 'dump.exe' never returns and no core file is generated.

My system is running WinXP-64. I have read on the archives that
dumper.exe should work correctly but it is not.

How can I finally debug my program?

Alberto



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/