Thank you Ngafei, Greg and Ed. It looks like the Interrupt Handler
Save Area is exactly what I'm looking for.
And someone else has pointed me to the mapping macro! SYS1.MODGEN(IHAIHSA)
[:-)]
Dave
At 3/6/2014 08:53 PM, Ngafei Huang wrote:
Very vague but I seem to remember if an interrupt have occurred (and
it should have since this is suspend lock) while holding local lock,
status should be saved in area pointed to buy ASSBIHSA of holder address space.
On Thursday, March 6, 2014 6:10:25 PM UTC-5, [email protected] wrote:
It has been a while since I looked at the code, but I believe in the IHSA
of the address space who's local lock is held.
Greg
At 3/7/2014 01:49 AM, Ed Jaffe wrote:
ASXBIHSA DS A - POINTER TO INTERRUPT HANDLERS SAVE
* AREA FOR LOCALLY LOCKED INTERRUPTS
Nice!
-----Original Message-----
From: David Cole <[email protected]>
To: IBM-MAIN <[email protected]>
Sent: Thu, Mar 6, 2014 5:09 pm
Subject: Where is status saved for LOCAL LOCK'd code?
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
Dave Cole
ColeSoft Marketing
414 Third Street, NE
Charlottesville, VA 22902
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