Re: gdb reverse debugging error

[paawan oza <paawan1982@yahoo.com>]

so does it support
XMM, SSE and MMX insn support for x86 also ?
regards,
Oza.


----- Original Message ----
From: Hui Zhu <teawater@gmail.com>
To: hefeweizen <horacio.sanchez@kit.edu>
Cc: gdb@sourceware.org
Sent: Tue, March 30, 2010 12:25:36 PM
Subject: Re: gdb reverse debugging error

Hi horacio,

Thanks for you to report us about this issue.

0f0d is a 3dnow insn, Current gdb(7.1 cvs-head) is still not suport it.
But we are working on it now, please try the patch in
http://sourceware.org/ml/gdb-patches/2010-03/msg00944.html if you are
interesting with it.

Best regards,
Hui

On Sat, Mar 27, 2010 at 23:29, hefeweizen <horacio.sanchez@kit.edu> wrote:
>
>
>
> Hi,
>
> i started to try reverse debugging with gdb 7, followin the tutorial:
>
> http://www.sourceware.org/gdb/wiki/ProcessRecord/Tutorial
>
> and I thought, great!
>
> Then I started to debug a real program which gives an error at the end. So I
> run it with gdb, and I put a breakpoint just before the place I think the
> error appears. Then I type "record" in order to start to recrd actions for
> future reverse-debugging. But after some steps I get
>
> Process record doesn't support instruction 0xf0d at address 0x2aaaab4c4b4e.
> Process record: failed to record execution log.
>
> Program received signal SIGTRAP, Trace/breakpoint trap.
> 0x00002aaaab4c4b4e in memcpy () from /lib64/libc.so.6
> (gdb) n
> Single stepping until exit from function memcpy,
> which has no line number information.
> Process record doesn't support instruction 0xf0d at address 0x2aaaab4c4b4e.
> Process record: failed to record execution log.
>
> Program received signal SIGABRT, Aborted.
> 0x00002aaaab4c4b4e in memcpy () from /lib64/libc.so.6
>
> Before I look at in in detail, I wonder if this feature is still buggy, or
> if I should start to record from the beginning.
>
> Where this "record" error happens, just an object is created as a copy of
> other:
>
> Thanks
>
> --
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>
>