Re: [RFC][gdb/cli] Ignore error in gdb command script

[Philippe Waroquiers via Gdb-patches <gdb-patches@sourceware.org>]

On Tue, 2021-05-18 at 17:16 +0200, Tom de Vries wrote:
> On 5/18/21 4:42 PM, Tom Tromey wrote:
> > > > > > > "Simon" == Simon Marchi via Gdb-patches <gdb-patches@sourceware.org> writes:
> > 
> > Simon> That sounds useful.  I think that "ignore-errors" is a good initial
> > Simon> name, because it's clear and self-describing.  We can always find and
> > Simon> add a short alias later.
> > 
> > Fedora has shipped a Python implementation of exactly this for a while now.
> > So, +1 for this name and approach from me.
> > 
> > One question is whether it should catch 'quit'.  I tend to think not but
> > it should be considered.
> > 
> > There is some other prior art too:
> > 
> >     https://sourceware.org/bugzilla/show_bug.cgi?id=8487
> > 
> > ignore-errors covers all the uses I've ever wanted personally, though,
> > so I think it would be fine to just go with that.  However if someone is
> > feeling more maximal, try-catch would also be an ok addition.
> 
> [ Thanks all for the feedback.  Replying to latest email, CC-ing Andrew. ]
> 
> Changes:
> - now a proper command
Instead of adding an ignore-errors command, an alternative could be to implement
this via a new GDB setting 'set ignore-errors on|off'.

This allows to do e.g.
  with ignore-errors on -- some-command
or (shorter form): 
  with ignore-errors -- some-command
or when needed
  with ignore-errors off -- some-command

This also allows to use
  set ignore-errors on
  ...
at the beginning of a script and/or in .gdbinit 
  and/or as a -ex 'set ignore-errors on' gdb startup arg.


Also, an alias can be defined such as:
  alias ie = with ignore-errors on --

Philippe


> - added error reporting
> - added completion
> - mention try-catch patch
> - mention pre-existing implementation on distros
> - mention quit behaviour.
> 
> I'm doing a build & reg-test now.
> 
> Thanks,
> - Tom