Re: Target Output Streaming in MI

Daniel Jacobowitz
2002-05-02T21:19:45Z

On Thu, May 02, 2002 at 05:10:56PM -0400, chanskw@ca.ibm.com wrote:
> Hi,
>
> As we are doing more investigation with MI, we having another question
> regarding output streaming in MI. As described in GDB manual:
>
> `"@" STRING-OUTPUT'
> The target output stream contains any textual output from the
> running target.
>
> Some of the examples in the manual show that program's output should be
> prefixed with '@'. However, we have never seen program output prefixed
> with '@'. After doing more experiments and looking into GDB source code,
> we found that program output will only be prefixed with '@' during remote
> debugging. Is this really the case?

Essentially, yes. There's a known failure in mi-console.exp
corresponding to this; it requires that GDB manage pseudoterminals for
the inferior process, and we don't do that (nor have we really decided
that it is a good idea; I at least have doubts...).

IMVHO, the best thing to do for native would be to have MI traffic on a
separate file descriptor than the inferior's stdin/out/err.

--
Daniel Jacobowitz Carnegie Mellon University
MontaVista Software Debian GNU/Linux Developer