[UNSTABLE][PATCH v2] UBUNTU: [Packaging] Build and include GDB Python scripts into debug packages

[Dimitri John Ledkov]

On Tue, May 18, 2021 at 12:09 PM Krzysztof Kozlowski
<krzysztof.kozlowski at canonical.com> wrote:
>
> On 18/05/2021 06:53, Matthias Klose wrote:
> > On 5/18/21 12:51 PM, Krzysztof Kozlowski wrote:
> >> On 17/05/2021 15:37, Dimitri John Ledkov wrote:
> >>> Hi,
> >>>
> >>> On Mon, May 17, 2021 at 7:50 PM Krzysztof Kozlowski
> >>> <krzysztof.kozlowski at canonical.com> wrote:
> >>>>
> >>>> The kernel comes with useful GDB debugging scripts/commands (enabled
> >>>> with CONFIG_GDB_SCRIPTS), however these are built either with "all" make
> >>>> target or with "scripts_gdb".  Build these in
> >>>> "$(stampdir)/stamp-build-%" target and package in "install-%" under
> >>>> /usr/lib/debug/share.
> >>>>
> >>>
> >>> I'm still not too sure about this location. Where did it come from?
> >>
> >> It came from other files in dbgsym package.
> >>
> >>>
> >>> Normally, when running under gdb it has autoload functionality of
> >>> loading auxiliary scripts.
> >>
> >> I am not sure if this is good idea to add them to autoload. They have no
> >> meaning outside of Linux kernel so why they should be present on each
> >> gdb run? Anyway user will have to load symbols separately, so why not
> >> loading scripts as well?
> >
> > No, symbols are loaded automatically by gdb, if they are found.
>
> They did not in my case, so maybe my command was wrong - how can you
> load them automatically?
>
> Different thing is that they should not be loaded automatically because
> they will kill gdb (by OOM) on smaller systems, like some cloud instances.

One should start a gdb server on the small system, connect to it from
the large machine and have the large machine load all the things.
Because yes, it is usually impossible to debug small machines in
place.

If symbols did not get autoloaded, there must be some mismatch
somewhere. The expectation is, if you have matching things installed,
launching gdb alone should be enough without explicitly setting or
asking for anything.

What steps were you doing to debug things / how to reproduce the
usability issue you had?

-- 
Regards,

Dimitri.