pgsql: Add debugging help in OwnLatch().

From: Thomas Munro <tmunro(at)postgresql(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Add debugging help in OwnLatch().
Date: 2022-05-31 00:08:15
Message-ID: E1nvpQl-001wgH-DI@gemulon.postgresql.org
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Add debugging help in OwnLatch().

Build farm animal gharial recently failed a few times in a parallel
worker's call to OwnLatch() with "ERROR: latch already owned". Let's
turn that into a PANIC and show the PID of the owner, to try to learn
more.

Discussion: https://postgr.es/m/CA%2BhUKGJ_0RGcr7oUNzcHdn7zHqHSB_wLSd3JyS2YC_DYB%2B-V%3Dg%40mail.gmail.com

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/12e28aac8e8eb76cab13a4e9b696e3dab17f1c99

Modified Files
--------------
src/backend/storage/ipc/latch.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

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