global tracing

[Roland McGrath]

> Answer to (a) is surely yes, but...

Since you're sure, what would you say to convince a skeptic?

> ... wouldn't it be better to first push the base utrace upstream and add
> this as a feature thereafter?

I think this is probably how it will go anyway.  I want to get a plan on
the table now.  The consensus here about the details will inform my ideas
for implementing it.  I want to think it through enough to see how the
innards would be and figure out if it will entail significant rearrangement
of the utrace implementation.


Thanks,
Roland