0004-Move-TRACE-calls-into-WaitOnLock.patch

From 05b8b4a7222795377f0a967b6408e61aa6b8c62f Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Mon, 22 Jul 2024 13:12:57 +0300
Subject: [PATCH 4/8] Move TRACE calls into WaitOnLock()

LockAcquire is a long and complex function. Pushing more stuff to its
subroutines makes it a little more manageable.
---
 src/backend/storage/lmgr/lock.c | 29 ++++++++++++++---------------
 1 file changed, 14 insertions(+), 15 deletions(-)

diff --git a/src/backend/storage/lmgr/lock.c b/src/backend/storage/lmgr/lock.c
index 489073259b6..bac950efdf3 100644
--- a/src/backend/storage/lmgr/lock.c
+++ b/src/backend/storage/lmgr/lock.c
@@ -1052,23 +1052,8 @@ LockAcquireExtended(const LOCKTAG *locktag,
 		 * case, because while trying to go to sleep, we may discover that we
 		 * can acquire the lock immediately after all.
 		 */
-
-		TRACE_POSTGRESQL_LOCK_WAIT_START(locktag->locktag_field1,
-										 locktag->locktag_field2,
-										 locktag->locktag_field3,
-										 locktag->locktag_field4,
-										 locktag->locktag_type,
-										 lockmode);
-
 		WaitOnLock(locallock, owner, dontWait);
 
-		TRACE_POSTGRESQL_LOCK_WAIT_DONE(locktag->locktag_field1,
-										locktag->locktag_field2,
-										locktag->locktag_field3,
-										locktag->locktag_field4,
-										locktag->locktag_type,
-										lockmode);
-
 		/*
 		 * NOTE: do not do any material change of state between here and
 		 * return.  All required changes in locktable state must have been
@@ -1812,6 +1797,13 @@ WaitOnLock(LOCALLOCK *locallock, ResourceOwner owner, bool dontWait)
 	LOCKMETHODID lockmethodid = LOCALLOCK_LOCKMETHOD(*locallock);
 	LockMethod	lockMethodTable = LockMethods[lockmethodid];
 
+	TRACE_POSTGRESQL_LOCK_WAIT_START(locallock->tag.lock.locktag_field1,
+									 locallock->tag.lock.locktag_field2,
+									 locallock->tag.lock.locktag_field3,
+									 locallock->tag.lock.locktag_field4,
+									 locallock->tag.lock.locktag_type,
+									 locallock->tag.mode);
+
 	LOCK_PRINT("WaitOnLock: sleeping on lock",
 			   locallock->lock, locallock->tag.mode);
 
@@ -1882,6 +1874,13 @@ WaitOnLock(LOCALLOCK *locallock, ResourceOwner owner, bool dontWait)
 
 	LOCK_PRINT("WaitOnLock: wakeup on lock",
 			   locallock->lock, locallock->tag.mode);
+
+	TRACE_POSTGRESQL_LOCK_WAIT_DONE(locallock->tag.lock.locktag_field1,
+									locallock->tag.lock.locktag_field2,
+									locallock->tag.lock.locktag_field3,
+									locallock->tag.lock.locktag_field4,
+									locallock->tag.lock.locktag_type,
+									locallock->tag.mode);
 }
 
 /*
-- 
2.39.2