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Re: The GNU GDB Debugger and NetBSD (Part 2)

Full report:

On 04.05.2020 22:17, Kamil Rytarowski wrote:
> The NetBSD team of developers maintains two copies of GDB:
>     One in the base-system with a stack of local patches.
>     One in pkgsrc with mostly build fix patches.
> The base-system version of GDB (GPLv3) still relies on a set of local
> patches. I set a goal to reduce the local patches to bare minimum,
> ideally reaching no local modifications at all.
> Over the past month I've reimplemented debugging support for
> multi-threaded programs and upstreamed the support. It's interesting to
> note that the old support relied on GDB tracking only a single inferior
> process. This caused the need to reimplement the support and be agnostic
> to the number of traced processes. Meanwhile the upstream developers
> introduced new features for multi-target tracing and a lot of
> preexisting code broke and needed resurrection. This affected also the
> code kept in the GDB basesystem version. Additionally over the past 30
> days, I've also developed new CPU-independent GDB features that were for
> a long time on a TODO list for NetBSD.
> After the past month NetBSD has now a decent and functional GDB support
> in the mainline. It's still not as featured as it could and CPU-specific
> handling will need a dedicated treatment.
> Plan for the next milestone
> Finish and upstream operational support of follow-fork, follow-vfork and
> follow-spawn events. Rewrite the gdbserver support and submit upstream.

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