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

Nico Weber via libcxx-dev libcxx-dev at lists.llvm.org
Tue May 7 11:48:37 PDT 2019

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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