[RFC] disassemble-next-line

[teawater <teawater at gmail dot com>]

Hi guys,

This is the patch for the function to output assembly codes for next line.
I this a rfc and doesn't include doc because we still a lot of thing
is not decided.  Such as the name, the behavior and maybe something
else.

I didn't add disassemble-next-line-max because I want output a warning
this message is cut if the number is bigger than max.
But make sure it's cut or not is not easy.  And there is already a
filter when output the assembly codes.
So I think maybe we don't need it.

Please send your comment.  Thanks a lot.  :)

Thanks,
Hui

On Thu, Mar 5, 2009 at 10:41, teawater <teawater@gmail.com> wrote:
>
> Thanks guys,
>
> For the people that want extend disassemble:
> Output assembly codes of next-line is just one part of this idea.
>
> We still have another part:
> 1. Auto mode, output assembly codes only if there is not line message
> for current pc.
> For example:
> (gdb) si
> 0x080483ee ? ? ?24 ? ? ? ? ? ? ?b = printf ("a = %d b = %d c = %d\n", a, b, c);
> (gdb) si
> 0x080482d8 in printf@plt ()
> Current language: ?auto; currently asm
> 0x080482d8 <printf@plt+0>: ? ? ?jmp ? ?*0x8049670
> (gdb) si
> 0x080482de in printf@plt ()
> 0x080482de <printf@plt+6>: ? ? ?push ? $0x10
>
> I think maybe is can be default option of gdb. ?Add it to display with itself?
>
>
> 2. Output assembly codes number limit.
> This idea form Doug:
> Also, the user might want to set a limit on the number of lines of
> disassembly displayed.
> If cut short gdb could print "[output cut short due to `set
> dissemble-next-line-max 10']" (or some such).
>
> I think maybe it need output something like "This message is cut ...
> you can set it with ...".
>
>
> 3. Special for optimized code.
> This idea form Doug too:
> For debugging optimized code, maybe it'd be nice if gdb determined
> there were more (discontiguous) lines of disassembly to display for
> the current source line and notified the user (by printing
> "discontiguous source line" or some such) before and/or after the
> output.
>
>
>
> I think maybe is too much thing for disassemble.
>
>
>
> Thanks,
> Hui
>
>
>
> On Thu, Mar 5, 2009 at 07:40, Tom Tromey <tromey@redhat.com> wrote:
> >>>>>> "Daniel" == Daniel Jacobowitz <drow@false.org> writes:
> >
> >>> Right, I thought about something that begins with "disassemble", but
> >>> didn't want to shoot our completion habits in the foot, since
> >>> currently typing just "disas TAB" is all I need to get disassembly.
> >
> > Daniel> I agree we don't want to change that binding (I use it all the time).
> > Daniel> But is it a problem? ?This would be under set, if I understand right.
> >
> > Yeah, this sounds reasonable to me.
> > I'd prefer to have some word like "disassemble" in the parameter name.
> >
> > Tom
> >

Attachment: disassemble-next-line.txt
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