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Cross-check lists of built-in LWLock tranches.

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lwlock.c, lwlock.h, and wait_event_names.txt each contain a list of
built-in LWLock tranches.  It is easy to miss one or the other when
adding or removing tranches, and discrepancies have adverse effects
(e.g., breaking JOINs between pg_stat_activity and pg_wait_events).
This commit moves the lists of built-in tranches in lwlock.{c,h} to
lwlocklist.h and adds a cross-check to the script that generates
lwlocknames.h.  If the lists do not match exactly, building will
fail.

Author: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/aHpOgwuFQfcFMZ/B%40ip-10-97-1-34.eu-west-3.compute.internal
This commit is contained in:
Nathan Bossart
2025-07-23 12:06:20 -05:00
parent 37c7a7eeb6
commit 2047ad0681
5 changed files with 167 additions and 124 deletions
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10
src/backend/utils/activity/wait_event_names.txt
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@@ -356,9 +356,13 @@ AioWorkerSubmissionQueue "Waiting to access AIO worker submission queue."
#
# END OF PREDEFINED LWLOCKS (DO NOT CHANGE THIS LINE)
#
# Predefined LWLocks (i.e., those declared in lwlocknames.h) must be listed
# in the section above and must be listed in the same order as in
# lwlocknames.h. Other LWLocks must be listed in the section below.
# Predefined LWLocks (i.e., those declared at the top of lwlocknames.h) must be
# listed in the section above and must be listed in the same order as in
# lwlocknames.h.
#
# Likewise, the built-in LWLock tranches (i.e., those declared at the bottom of
# lwlocknames.h) must be listed in the section below and must be listed in the
# same order as in lwlocknames.h.
#
XactBuffer "Waiting for I/O on a transaction status SLRU buffer."