> On Mar 18, 2016, at 10:20 AM, Zachary Turner via lldb-dev 
> <lldb-dev@lists.llvm.org> wrote:
> 
> Is it ok to add a public API that isn't interfaced to Python?  In this case 
> the culprit is the signal() function.  Windows doesn't really support signal 
> in the same way that other platforms do, so there's some code in each driver 
> that basically defines a signal function, and then if you're unlucky when you 
> build, or accidentally include the wrong header file (even indirectly), 
> you'll get multiply defined symbol errors.
> 
> So what I wanted to do was make a Host::Signal() that on Windows had our 
> custom implementation, and on other platforms just called signal.  But it 
> returns and accepts function pointers, and making this work through the 
> python api is going to be a big deal, if not flat out impossible.

Why is this an issue in Python? Doesn't python abstract this for you? Or is it 
just a NOP on windows??
> 
> The idea is that instead of writing signal() everywhere, we would write 
> lldb_private::Host::Signal() everywhere instead.  

Is this just to get a callback when a certain signal is sent to a process, like 
to handle SIGINT?

Why this is hard to hook through SBHostOS if python doesn't provide an 
abstraction?

> 
> On Fri, Mar 18, 2016 at 10:16 AM Jim Ingham <jing...@apple.com> wrote:
> The driver used to have a bunch of lldb_private stuff in it, mostly to run 
> the event loop, which Greg abstracted into SB API’s a while ago.  If it can 
> be avoided, I’d rather not add it back in.  Our claim is folks should be able 
> to write their own debugger interfaces (command line or gui) using the SB 
> API’s, so it would be good if we stuck to that discipline as well.
> 
> I thought that the lldm-mi was pure SB API’s.  That seemed a virtue to me.
> 
> Jim
> 
> > On Mar 18, 2016, at 9:54 AM, Zachary Turner via lldb-dev 
> > <lldb-dev@lists.llvm.org> wrote:
> >
> > I notice everything uses SB classes only.  Is this a hard requirement?  We 
> > have a bit of cruft in all of the top-level executables (lldb-server, 
> > lldb-mi, lldb) that could be shared if we could move it into Host, but then 
> > the 3 drivers would have to #include "lldb/Host/Host.h".  Note that lldb-mi 
> > and lldb-server already do this, it's only lldb that doesn't.  Is this ok?
> >
> > If not, I can always add a method to SBHostOS and just not add a 
> > corresponding swig interface definition for it (so it wouldn't be 
> > accessible from Python), which would achieve basically the same effect.
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