[lldb-dev] How to get SBTarget before AttachToProcessWithID?

[Jeffrey Tan via lldb-dev]

Thanks guys, will give empty target a try.

On Mon, Feb 1, 2016 at 12:10 PM, Jim Ingham <jingham at apple.com> wrote:

> Often when attaching, you know the executable you are planning to attach
> to.  So the "normal" workflow is to create a target, then attach to the
> process with that target's executable.  This is particularly useful for
> remote debugging, since having a local copy of the binary will mean less
> data lldb has to ship over the remote connection.  It also means you can
> prep the target with breakpoints & settings prior to attach.
>
> The case where you don't know the binary before you attach is a degenerate
> case of this, and so the sensible thing is to create an empty target, and
> use that to attach.  Then attaching will fill in this empty target.
>
> That makes more sense to me than having the debugger - which is the only
> thing above the target - support "Attach to anonymous app" but the target
> do "attach to known app".
>
> BTW, the most straightforward way to create an empty target is to call
> SBDebugger.CreateTarget("").  I added a note to this effect in the
> SBDebugger help preamble.
>
> Jim
>
> > On Feb 1, 2016, at 2:02 AM, Pavel Labath via lldb-dev <
> lldb-dev at lists.llvm.org> wrote:
> >
> > Hi,
> >
> > it's a bit un-intuitive, but you should be able to create a target
> > with a null pointer for the executable, and use that to attach (see
> > CommandObjectProcessAttach::DoExecute).
> >
> > BTW, if you find the existing API documentation too vague, we'd be
> > happy to accept any improvements.
> >
> > cheers,
> > pl
> >
> >
> > On 30 January 2016 at 05:42, Jeffrey Tan via lldb-dev
> > <lldb-dev at lists.llvm.org> wrote:
> >> Hi,
> >>
> >> Normally if you want to attach to a process you only have the pid/name
> of
> >> the process. How do you get SBTarget? Am I supposed to call
> >> SBDebugger.CreateTargetWithFileAndArch() against a dummy executable?
> Why do
> >> we require a dummy SBTarget before attaching? This seems to be a wrong
> >> design to me... Thanks.
> >>
> >>
> >>
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