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

Nico Weber via libcxx-dev libcxx-dev at lists.llvm.org
Wed Jul 10 12:47:40 PDT 2019

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
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