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Fujii Masao 0d3be05017 Fix ProcWakeup() resetting wrong waitStart field. 
Previously, when one process woke another that was waiting on a lock,
ProcWakeup() incorrectly cleared its own waitStart field (i.e.,
MyProc->waitStart) instead of that of the process being awakened.
As a result, the awakened process retained a stale lock-wait start timestamp.

This did not cause user-visible issues. pg_locks.waitstart was reported as
NULL for the awakened process (i.e., when pg_locks.granted is true),
regardless of the waitStart value.

This bug was introduced by commit 46d6e5f567.

This commit fixes this by resetting the waitStart field of the process
being awakened in ProcWakeup().

Backpatch to all supported branches.

Reported-by: Chao Li <li.evan.chao@gmail.com>
Author: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: ji xu <thanksgreed@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Discussion: https://postgr.es/m/537BD852-EC61-4D25-AB55-BE8BE46D07D7@gmail.com
Backpatch-through: 14
2026-02-26 08:50:45 +09:00
..
backend Fix ProcWakeup() resetting wrong waitStart field. 2026-02-26 08:50:45 +09:00
bin Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
common Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
fe_utils Fix bug in archive streamer with LZ4 decompression 2025-07-02 13:48:41 +09:00
include Allow PG_PRINTF_ATTRIBUTE to be different in C and C++ code. 2026-02-25 11:57:26 -05:00
interfaces Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
makefiles pgxs.mk: remove unreachable rule for deleting regress.def. 2025-06-20 12:12:29 -04:00
pl Translation updates 2026-02-23 13:53:35 +01:00
port Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
template thread-safety: gmtime_r(), localtime_r() 2024-08-23 07:43:04 +02:00
test Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
timezone Fix some cases of indirectly casting away const. 2026-02-25 11:19:50 -05:00
tools Harden _int_matchsel() against being attached to the wrong operator. 2026-02-09 10:14:22 -05:00
tutorial Doc: simplify the tutorial's window-function examples. 2025-01-21 14:43:21 -05:00
.gitignore
DEVELOPERS
Makefile Remove distprep 2023-11-06 15:18:04 +01:00
Makefile.global.in Don't put library-supplied -L/-I switches before user-supplied ones. 2025-07-29 15:17:40 -04:00
Makefile.shlib Use exported symbols list on macOS for loadable modules as well 2025-06-10 07:04:43 +02:00
meson.build Update copyright for 2025 2025-01-01 11:21:55 -05:00
nls-global.mk Fix update-po for the PGXS case 2025-10-16 20:21:05 +02:00