I have a question. Recently, I was using z/XDC to watch the flow of
execution of some task in a different aspace. At one point, that code
acquired the Local Lock and then fell into a closed, tight execution
loop ("B *" actually - I guess that's as tight as it gets.)
But watching this thing from another aspace, I could not tell where
the execution loop was!
Normally, I would look at the resume PSW from the newest RB/XSB on
the running TCB, but in this case the LLOCK was held, so the RB
information was ancient history.
So my question is, when the LOCAL LOCK is held and a the aspace that
holds it is spinning, and I'm looking in from the outside, where do I
look to to find that aspace's current PSW and registers?
(Eventually, we took a dump and looked in the System Trace and found
the loop from recorded interrupt addresses, but I'd like to be able
to figure this out live... without having to resort to a dump.)
TIA,
Dave Cole
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