How to log instructions with GDB

How to log instructions with GDB

[Mahmood Naderan]

Hi,
I would like to know if GDB has a mechanism to trace the execution
instructions while debugging.
I am looking for a way to write the executed instructions (similar to the
disassembly format) in a file.

Regards,
Mahmood

Re: How to log instructions with GDB

[Mahmood Naderan]

I am trying that on virtualbox. I get

(gdb) record btrace
Target does not support branch tracing.

Also, I would like to know where is the file contains "record full"
information?

Regards,
Mahmood




On Wed, Mar 10, 2021 at 12:27 PM Metzger, Markus T <
markus.t.metzger@intel.com> wrote:

> Hello Mahmood,
>
> There's the 'record' command to start recording the execution.  By
> default, you'd
> get s/w recording ('record full') that also records data.  With 'record
> btrace' you'd
> get a h/w recording solution on systems that support it.
>
> At least 'record btrace' supports 'record instruction-history', which
> should do
> what you're looking for.  It is supported on recent IA systems.
>
> There's some documentation on those in the GDB manual.
>
> Regards,
> Markus.
>
> > -----Original Message-----
> > From: Gdb <gdb-bounces@sourceware.org> On Behalf Of Mahmood Naderan via
> > Gdb
> > Sent: Montag, 8. März 2021 15:33
> > To: gdb@sourceware.org
> > Subject: How to log instructions with GDB
> >
> > Hi,
> > I would like to know if GDB has a mechanism to trace the execution
> > instructions while debugging.
> > I am looking for a way to write the executed instructions (similar to the
> > disassembly format) in a file.
> >
> > Regards,
> > Mahmood
> Intel Deutschland GmbH
> Registered Address: Am Campeon 10, 85579 Neubiberg, Germany
> Tel: +49 89 99 8853-0, www.intel.de <http://www.intel.de>
> Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva
> Chairperson of the Supervisory Board: Nicole Lau
> Registered Office: Munich
> Commercial Register: Amtsgericht Muenchen HRB 186928
>

RE: How to log instructions with GDB

[Metzger, Markus T]

Looks like neither PT nor BTS is virtualized.  You’d need to try on a physical system.

The GDB manual describes record full and there’s also ‘help record’.

Regards,
Markus.

From: Mahmood Naderan <mahmood.nt@gmail.com>
Sent: Mittwoch, 10. März 2021 13:15
To: Metzger, Markus T <markus.t.metzger@intel.com>; gdb@sourceware.org
Subject: Re: How to log instructions with GDB

I am trying that on virtualbox. I get

(gdb) record btrace
Target does not support branch tracing.

Also, I would like to know where is the file contains "record full" information?

Regards,
Mahmood



On Wed, Mar 10, 2021 at 12:27 PM Metzger, Markus T <markus.t.metzger@intel.com<mailto:markus.t.metzger@intel.com>> wrote:
Hello Mahmood,

There's the 'record' command to start recording the execution.  By default, you'd
get s/w recording ('record full') that also records data.  With 'record btrace' you'd
get a h/w recording solution on systems that support it.

At least 'record btrace' supports 'record instruction-history', which should do
what you're looking for.  It is supported on recent IA systems.

There's some documentation on those in the GDB manual.

Regards,
Markus.

> -----Original Message-----
> From: Gdb <gdb-bounces@sourceware.org<mailto:gdb-bounces@sourceware.org>> On Behalf Of Mahmood Naderan via
> Gdb
> Sent: Montag, 8. März 2021 15:33
> To: gdb@sourceware.org<mailto:gdb@sourceware.org>
> Subject: How to log instructions with GDB
>
> Hi,
> I would like to know if GDB has a mechanism to trace the execution
> instructions while debugging.
> I am looking for a way to write the executed instructions (similar to the
> disassembly format) in a file.
>
> Regards,
> Mahmood
Intel Deutschland GmbH
Registered Address: Am Campeon 10, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de<http://www.intel.de> <http://www.intel.de>
Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928
Intel Deutschland GmbH
Registered Address: Am Campeon 10, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de <http://www.intel.de>
Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva  
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928