Re: [PATCH v1 0/4] gdb/python: more fixes again for Python limited C API support

[Matthieu Longo <matthieu.longo@arm.com>]

On 09/04/2026 11:51, Matthieu Longo wrote:
> This patch series fixes more issues encountered while enabling the Python limited C API in GDB. This is probably the last relatively-small patch series before the Python C extension types migration to the limited API.
> 
> Patch 1 reuses a previous patch publised by Tom Tromey [1], with additional modifications that are required for its usage in the Python C extension types migration.
> Patch 2 adapts the signature of eval_python_command() to return both the exit code and the result.
> Patch 3 migrates Python initialization to use the new config API (PEP 741) introduced by Python 3.14. Old code is preserved for older versions of Python.
> Patch 4 proposes a workaround for the missing symbols not yet part of the limited API. Thanks to it, I was able to finish the compilation of GDB using the limited C API and run all the Python tests successfully.
> 
> All changes were tested by building GDB against the unlimited API of Python 3.10, 3.11, 3.12, 3.13 and 3.14, and the limited API of Python 3.14 (no build regression), and no regressions were observed in the testsuite.
> 
> Regards,
> Matthieu
> 
> [1]: https://inbox.sourceware.org/gdb-patches/20260222200759.1587070-2-tom@tromey.com/
> 
> 
> Matthieu Longo (3):
>    gdb/python: eval_python_command returns both exit code and result
>    gdb/python: migrate Python initialization to use the new config API (PEP 741)
>    gdb/python: work around missing symbols not yet part of Python limited API
> 
> Tom Tromey (1):
>    gdb/python: add gdbpy_borrowed_ref
> 
>   gdb/python/py-gdb-readline.c            |   3 +-
>   gdb/python/py-ref.h                     | 114 +++++++++++++++
>   gdb/python/python-internal.h            |   7 +-
>   gdb/python/python-limited-api-missing.h |  62 ++++++++
>   gdb/python/python.c                     | 182 ++++++++++++++++++++----
>   gdb/varobj.c                            |  12 +-
>   6 files changed, 341 insertions(+), 39 deletions(-)
>   create mode 100644 gdb/python/python-limited-api-missing.h
> 

Hi Tom,

Do you know when you will have a chance to look at this patch series ?

If you are short in time, you might want to focus only on patch 1 for now. As you probably suspect, 
this patch is going to be used in various places in the upcoming patches. I would like to get 
gdbpy_borrowed_ref merged, or at least agreed upon even if it requires some reworks.

Regards,
Matthieu