[libcxx-dev] Contributing debug visualizers for libc++

[Sterling Augustine via libcxx-dev]

We have been on a bit of a sprint for gdb libc++ pretty printers over the
last week or two. We have a reasonable set right now, with more coming. And
a very good test harness and set of tests too.

We would love to get a good upstreaming story here, and it is high on my
list of priorities.

On Thu, Jul 11, 2019 at 11:48 AM Eric Christopher <echristo at gmail.com>
wrote:

> Relatedly Sterling has been working with people on gdb pretty printers
> and so having a place in the libc++ sources would be great. :)
>
> Also things like testing that they don't break should be at least
> thought about a little bit.
>
> -eric
>
> On Wed, Jul 10, 2019 at 12:47 PM Nico Weber via libcxx-dev
> <libcxx-dev at lists.llvm.org> wrote:
> >
> > Friendly ping :)
> >
> > On Wed, May 8, 2019 at 2:33 PM Nico Weber <thakis at chromium.org> wrote:
> >>
> >> Sorry about the additional email, but the file has moved around. The
> new location is at
> https://cs.chromium.org/chromium/src/build/config/c%2B%2B/libc%2B%2B.natvis?q=file:libc...natvis&sq=package:chromium&g=0&l=1
> >>
> >> On Tue, May 7, 2019 at 2:48 PM Nico Weber <thakis at chromium.org> wrote:
> >>>
> >>> Thanks for the quick response! No rush, next week sounds great :)
> >>>
> >>> On Tue, May 7, 2019 at 2:46 PM Marshall Clow <mclow.lists at gmail.com>
> wrote:
> >>>>
> >>>>
> >>>>
> >>>> On Tue, May 7, 2019 at 12:08 PM Nico Weber via libcxx-dev <
> libcxx-dev at lists.llvm.org> wrote:
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> Chromium now uses a statically linked libc++ on most platforms. One
> piece of feedback we got from devs is that they don't want the switch to
> libc++ to impede their debugging experience, so we wrote a natvis file that
> teaches Microsoft's debuggers how to display libc++ types. We're also using
> https://github.com/koutheir/libcxx-pretty-printers to achieve the same
> for gdb.
> >>>>>
> >>>>> Other projects are probably also interested in having good libc++
> support in their debuggers. Would there be interest to have these debug
> visualizers right in the libc++ repository, either somewhere in utils/, or
> in a new misc/ directory, or what have you?
> >>>>>
> >>>>> We'd gladly contribute the natvis file [1] under LLVM's license.
> >>>>>
> >>>>> (libcxx-pretty-printers is a separate project not done by us. If
> this thread goes somewhere, I'm planning to ask the upstream maintainers if
> they'd be open to relicensing and contributing the gdb pretty printers to
> upstream libcxx as well, but they might not agree. If they don't, we
> (chromium) might want to write libc++ pretty printers for gdb from scratch
> and contribute those, but not sure.)
> >>>>>
> >>>>
> >>>> Nico --
> >>>>
> >>>> I'm going to apologize in advance for a slow response, since I (and
> Louis) are at C++Now this week.
> >>>> This sounds really interesting, and I'll take a look at this early
> next week.
> >>>>
> >>>> -- Marshall
> >>>>
> >
> > _______________________________________________
> > libcxx-dev mailing list
> > libcxx-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/libcxx-dev
>
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