Re: [PATCH 4/5] Support 'info proc files' on live FreeBSD processes.

[John Baldwin <jhb at FreeBSD dot org>]

On 9/8/18 4:00 PM, Simon Marchi wrote:
> On 2018-09-08 01:36 AM, John Baldwin wrote:
>> This walks the list of struct kinfo_file objects returned by a call to
>> kinfo_getfile outputting a description of each open file descriptor.
> 
> LGTM.
> 
> It would be nice to share the printing of the information between core
> and live process, so that we can't forget to change one if we change the
> other.  But if there are some subtle differences between both loops that
> would make sharing more annoying than anything, I don't mind.

I've followed the same approach I used for 'info proc mappings' which is
to use shared helper routines as much as possible.

What I could perhaps do to share code is add new TARGET_FREEBSD_<foo>
target objects, but this would entail reworking the code quite a bit I
think.  It would mean that I would need a way to let a gdbarch hook into
the core target's xfer_partial method more generically (right now there is
a hook just for siginfo, but I think we'd want a hook for arbitrary
objects).  I would then rewrite the info proc bits in fbsd-tdep.c in terms
of fetching target objects and always parsing them in the core dump
format.  I think there were a few things in some of the other 'info proc'
methods that weren't quite as straightforward as for the 'files' and
'mappings' case though.

-- 
John Baldwin