Re: Wrong Reverse result

[Ramana Radhakrishnan <ramana.r@gmail.com>]

> Great.  Thanks for doing that so quick.
> I forgot how to turn on those nice traces.  Can you
> remind me?
> The traces don't mean much to me, but I can include them
> in any future (if any :-)) issues.


help set debug on the gdb command line .

cheers
Ramana

>
>> infrun: TARGET_WAITKIND_STOPPED
>> infrun: stop_pc = 0x8048361
>> infrun: stepped into subroutine
>> infrun: inserting step-resume breakpoint at 0x8048349
>>
>> stop_stepping is better.
>>
>> infrun: resume (step=0, signal=0), trap_expected=0
>> infrun: prepare_to_wait
>> infrun: target_wait (-1, status) =
>> infrun:   10798 [process 10798],
>> infrun:   status->kind = no-history
>> infrun: infwait_normal_state
>>
>> No more reverse-execution history.
>> infrun: stop_stepping
>> main () at 1.c:7
>>
>> On Thu, Jun 11, 2009 at 00:49, Marc
>> Khouzam<marc.khouzam@ericsson.com> wrote:
>> > Hi,
>> >
>> > I'm getting a weird behaviour in reverse, where GDB
>> > jumps to far backwards.
>> >
>> > I have GDB HEAD from two weeks ago with the three
>> > missing PRrecord patches applied (that were pinged
>> > by Hui this very week).
>>
>> All of patches are not for prec, they are for reverse.
>
> I realized that just after pressing 'send' :-)
>
>> > I'm running on Ubuntu.
>> > Is it me or can someone reproduce it?
>> > (It happened during my presentation at the GCC summit,
>> > so I have witnesses :-))
>>
>> I am not sure Michael in GCC summit or not.  If so, you can let he fix
>> it at there directly.  :)
>
> The summit is over now, but I did meet with Michael.  It's nice to see
> people face to face.  I was able to put a bit of pressure on him
> about reviewing the missing patches ;-).  I'm sure that as soon as he
> has time, he'll have a look at these four things.
>
> Thanks Hui
>
> marc
>
>>
>> Thanks for your help.
>>
>> Hui
>>
>> >
>> > Thanks
>> >
>> > Marc
>> >
>> > GNU gdb (GDB) 6.8.50.20090522-cvs
>> > Copyright (C) 2009 Free Software Foundation, Inc.
>> > License GPLv3+: GNU GPL version 3 or later
>> > <http://gnu.org/licenses/gpl.html>
>> > This is free software: you are free to change and redistribute it.
>> > There is NO WARRANTY, to the extent permitted by law.  Type "show
>> > copying"
>> > and "show warranty" for details.
>> > This GDB was configured as "i686-pc-linux-gnu".
>> > For bug reporting instructions, please see:
>> > <http://www.gnu.org/software/gdb/bugs/>...
>> > (gdb) l
>> > 1       void foo() {
>> > 2           return;
>> > 3       }
>> > 4
>> > 5       int main() {
>> > 6
>> > 7               foo(); // 1
>> > 8               foo(); // 2
>> > 9               foo(); // 3
>> > 10
>> > (gdb) l
>> > 11              return 0;
>> > 12      }
>> > (gdb) start
>> > Temporary breakpoint 1 at 0x80483f7: file r.c, line 7.
>> > Starting program: /home/marc/testing/a.out
>> >
>> > Temporary breakpoint 1, main () at r.c:7
>> > 7               foo(); // 1
>> > Current language:  auto; currently c++
>> > (gdb) record
>> > (gdb) n
>> > 8               foo(); // 2
>> > (gdb) n
>> > 9               foo(); // 3
>> > (gdb) n
>> > 11              return 0;
>> > (gdb) rn
>> > 9               foo(); // 3
>> > (gdb) s
>> > foo () at r.c:3
>> > 3       }
>> > (gdb) rn
>> >
>> > No more reverse-execution history.
>> > main () at r.c:7
>> > 7               foo(); // 1
>> >
>> > ======== This is weird.  Why does it go back to the top?
>> >
>>
>