On Sat, Mar 25, 2023 at 11:52 AM Gilbert Barmwater <gi...@bellsouth.net>
wrote:

> Let me see if I've got this.  If there was a class, perhaps a subclass
> of outputStream, that implemented a SAY method which would "collect" the
> additional multi-threading information and add it to the argument that
> it receives, then one would only need to create an instance of that
> class associated with (presumably) STDERR and then change the
> destination of .traceOutput to be that instance.  The "enhanced" trace
> lines would appear instead of the standard trace lines.  Is that
> somewhat correct?
>

Pretty much spot on. It would require a couple of enhancements in other
places to allow the additional information to be gathered, but those would
be fairly trivial to implement and also useful for situations other than
TRACE. This solution requires no new TRACE command syntax, and the
arguments about how much information is appropriate to add goes away
because any user can choose to modify the information as they see fit.

Rick

>
> Gil
>
> On 3/25/2023 8:34 AM, Rick McGuire wrote:
> > I had one of those AHA moments this morning. The whole question about
> > multithreaded tracing can be quite cleanly resolved by removing the
> > question from the TRACE command entirely.
> >
> > Currently, the trace output is written to the .TRACEOUTPUT monitor.
> > With a few small enhancements to already existing classes, it would be
> > possible for any additional information to be added by the
> > TRACEOUPUT target. To enable it, one would only need to push a new
> > output destination to the monitor. The new destination would add any
> > additional debug information to the trace lines. This is not only
> > pretty simple, but it also means any user can customize the trace
> > information to their own requirements, though it would be nice to
> > supply a couple of builtin alternatives.
> >
> > The enhancements necessary to do this are pretty simple. The
> > StackFrame class already has most of the information you need for
> > debugging, but it could use methods to expose a threadid, instance id,
> > and also the current GUARD status in the case of method calls. This
> > can be quite easily done, and would provide useful debug information
> > for more than just the trace output. It might be desirable to add the
> > same methods to .Context. I can go either way with that one.
> >
> > Rick
> >
> >
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