[lldb-dev] Connecting to lldb-rpc-server

Fri Oct 7 14:30:35 PDT 2016

That actually seems really doable! Thanks for the info, we'll give that a
shot!

On Fri, Oct 7, 2016 at 1:40 PM, Sean Callanan <scallanan at apple.com> wrote:

> Once you have Python commands, could you make them into a simple RPC
> service and set up a new socket connection to your program from the LLDB
> side, all implemented in Python?
>
> Sean
>
> > On Oct 7, 2016, at 12:29 PM, Jim Ingham via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
> >
> > Enrico is right.  At present, each connection to the lldb-rpc-server
> gets its own SBDebugger, so you wouldn't be able to talk to the debugger
> that Xcode is using for its process.
> >
> > Even if that was changed, then you'd run into other problems, for
> instance, at present only one Listener can wait for process events from the
> debugger, so you would not be able to control execution or coordinate with
> Xcode's running of the process.  But this is probably just the tip of the
> iceberg of things that would go wrong if you try to do this.
> >
> > If you have lots of resources to devote to hacking on lldb itself, I'm
> sure you could make this work, but this is a very tricky part of lldb, so
> the engineering work would be non-trivial to say the least.  I don't know
> your circumstances, but I doubt it would end up being worthwhile for you.
> >
> > Enrico's suggestion of making Python commands to do the job is probably
> the best way to go.
> >
> > Note, it used to be tricky to get a plain command tool (lldb-rpc-server)
> to connect to the Window Server and put up UI.  I haven't tried that since
> I worked on Tcl/Tk way back in the day, so it may be easier now.  But you
> should probably also experiment with that to make sure that's possible
> before you go too far down this route.
> >
> > Jim
> >
> >
> >> On Oct 7, 2016, at 12:05 PM, Rex Fenley via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
> >>
> >> https://media4.giphy.com/media/l2Je27KfKp8x71qAo/200.gif
> >>
> >> On Fri, Oct 7, 2016 at 12:01 PM, Enrico Granata <egranata at apple.com>
> wrote:
> >> It is my understanding that this is not possible in the current
> architecture
> >>
> >>> On Oct 7, 2016, at 11:55 AM, Rex Fenley <rex at remind101.com> wrote:
> >>>
> >>> We expect to have a rich user experience as this tool progresses,
> using Python to generate UI will limit our development process. It would be
> much simpler if we could communicate with Xcode's lldb directly from our
> application.
> >>>
> >>> On Fri, Oct 7, 2016 at 11:33 AM, Enrico Granata <egranata at apple.com>
> wrote:
> >>> I can see a couple of avenues for your use case:
> >>>
> >>> - you can write custom LLDB commands (obligatory reference:
> http://lldb.llvm.org/python-reference.html) and have your users type
> these via the console instead of by clicking buttons
> >>> - you could write a Python script that pops up extra UI and have your
> buttons run as part of LLDB that way. I have admittedly never tried to do
> this, and it might require some tinkering, but in theory I believe it
> should be possible
> >>>
> >>> Personally, I'd rather much have console commands I can type instead
> of a magic separate UI that might even be hidden underneath other windows
> or hiding useful information unless I drag it out of the way, but then it's
> annoying to reach for when I need it, ..., but that's me...
> >>>
> >>>> On Oct 7, 2016, at 11:27 AM, Rex Fenley <rex at remind101.com> wrote:
> >>>>
> >>>> I'm trying to build a separate debugging tool that can be used in
> unison with Xcode it will provide buttons that are shortcuts to lldb
> scripts we write.
> >>>>
> >>>> On Fri, Oct 7, 2016 at 10:45 AM, Enrico Granata <egranata at apple.com>
> wrote:
> >>>> I am gonna echo Kate's question, but delve one level deeper
> >>>>
> >>>> Why do you want to send commands to LLDB from a different process?
> >>>>
> >>>> We have a bunch of different extension points in LLDB, so it's
> possible that what you're trying to do is actually already possible
> >>>>
> >>>>> On Oct 7, 2016, at 10:41 AM, Rex Fenley via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
> >>>>>
> >>>>> Hi Kate,
> >>>>>
> >>>>> I'm trying to connect to the running instance of lldb in Xcode to
> send commands to it from a different process :)
> >>>>>
> >>>>> On Fri, Oct 7, 2016 at 10:27 AM, Kate Stone <k8stone at apple.com>
> wrote:
> >>>>> The RPC mechanism used in Xcode 8 is not a part of the open source
> LLDB project and should be treated as an implementation detail of Xcode.
> What are you trying to accomplish?
> >>>>>
> >>>>> Kate Stone k8stone at apple.com
> >>>>>  Xcode Low Level Tools
> >>>>>
> >>>>>> On Oct 6, 2016, at 6:11 PM, Rex Fenley via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
> >>>>>>
> >>>>>> Hi! I'm trying to connect to Xcode's lldb rpc server but I'm having
> trouble.
> >>>>>>
> >>>>>> This doesn't seem to work to list the hosts.
> >>>>>> rpcinfo -p lldb-rpc-server
> >>>>>>
> >>>>>> Can't contact rpcbind on lldb-rpc-server
> >>>>>>
> >>>>>>
> >>>>>> rpcinfo: RPC: Unknown host
> >>>>>>
> >>>>>> Am I doing this correctly?
> >>>>>>
> >>>>>> --
> >>>>>> Rex Fenley  |  IOS DEVELOPER
> >>>>>>
> >>>>>>
> >>>>>> Remind.com |  BLOG  |  FOLLOW US  |  LIKE US
> >>>>>> _______________________________________________
> >>>>>> lldb-dev mailing list
> >>>>>> lldb-dev at lists.llvm.org
> >>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Rex Fenley  |  IOS DEVELOPER
> >>>>>
> >>>>>
> >>>>> Remind.com |  BLOG  |  FOLLOW US  |  LIKE US
> >>>>> _______________________________________________
> >>>>> lldb-dev mailing list
> >>>>> lldb-dev at lists.llvm.org
> >>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> >>>>
> >>>>
> >>>> Thanks,
> >>>> - Enrico
> >>>> 📩 egranata@.com ☎️ 27683
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Rex Fenley  |  IOS DEVELOPER
> >>>>
> >>>>
> >>>> Remind.com |  BLOG  |  FOLLOW US  |  LIKE US
> >>>
> >>>
> >>> Thanks,
> >>> - Enrico
> >>> 📩 egranata@.com ☎️ 27683
> >>>
> >>>
> >>>
> >>>
> >>> --
> >>> Rex Fenley  |  IOS DEVELOPER
> >>>
> >>>
> >>> Remind.com |  BLOG  |  FOLLOW US  |  LIKE US
> >>
> >>
> >> Thanks,
> >> - Enrico
> >> 📩 egranata@.com ☎️ 27683
> >>
> >>
> >>
> >>
> >> --
> >> Rex Fenley  |  IOS DEVELOPER
> >>
> >>
> >> Remind.com |  BLOG  |  FOLLOW US  |  LIKE US
> >> _______________________________________________
> >> lldb-dev mailing list
> >> lldb-dev at lists.llvm.org
> >> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> >
> > _______________________________________________
> > lldb-dev mailing list
> > lldb-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>
>

-- 

Rex Fenley  |  IOS DEVELOPER

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