From 08890b407e976e4871f2024ed5a3071d0fa510a6 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Fri, 25 Mar 2005 18:30:28 +0000
Subject: Fix resource owner code to generate catcache and relcache leak
 warnings when open references remain during normal cleanup of a resource
 owner. This restores the system's ability to warn about leaks to what it was
 before 8.0.  Not really a user-level bug, but helpful for development.

---
 src/backend/utils/cache/catcache.c | 39 +++++++++++++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 7 deletions(-)

(limited to 'src/backend/utils/cache/catcache.c')

diff --git a/src/backend/utils/cache/catcache.c b/src/backend/utils/cache/catcache.c
index 68995f9838..44ef1de6ee 100644
--- a/src/backend/utils/cache/catcache.c
+++ b/src/backend/utils/cache/catcache.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/cache/catcache.c,v 1.118 2004/12/31 22:01:25 pgsql Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/cache/catcache.c,v 1.119 2005/03/25 18:30:27 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -556,8 +556,7 @@ AtEOXact_CatCache(bool isCommit)
 			if (cl->refcount != 0)
 			{
 				if (isCommit)
-					elog(WARNING, "cache reference leak: cache %s (%d), list %p has count %d",
-						 ccp->cc_relname, ccp->id, cl, cl->refcount);
+					PrintCatCacheListLeakWarning(cl);
 				cl->refcount = 0;
 			}
 
@@ -579,10 +578,7 @@ AtEOXact_CatCache(bool isCommit)
 		if (ct->refcount != 0)
 		{
 			if (isCommit)
-				elog(WARNING, "cache reference leak: cache %s (%d), tuple %u has count %d",
-					 ct->my_cache->cc_relname, ct->my_cache->id,
-					 HeapTupleGetOid(&ct->tuple),
-					 ct->refcount);
+				PrintCatCacheLeakWarning(&ct->tuple);
 			ct->refcount = 0;
 		}
 
@@ -1807,3 +1803,32 @@ PrepareToInvalidateCacheTuple(Relation relation,
 					 ccp->cc_relisshared ? (Oid) 0 : MyDatabaseId);
 	}
 }
+
+
+/*
+ * Subroutines for warning about reference leaks.  These are exported so
+ * that resowner.c can call them.
+ */
+void
+PrintCatCacheLeakWarning(HeapTuple tuple)
+{
+	CatCTup    *ct = (CatCTup *) (((char *) tuple) -
+								  offsetof(CatCTup, tuple));
+
+	/* Safety check to ensure we were handed a cache entry */
+	Assert(ct->ct_magic == CT_MAGIC);
+
+	elog(WARNING, "cache reference leak: cache %s (%d), tuple %u/%u has count %d",
+		 ct->my_cache->cc_relname, ct->my_cache->id,
+		 ItemPointerGetBlockNumber(&(tuple->t_self)),
+		 ItemPointerGetOffsetNumber(&(tuple->t_self)),
+		 ct->refcount);
+}
+
+void
+PrintCatCacheListLeakWarning(CatCList *list)
+{
+	elog(WARNING, "cache reference leak: cache %s (%d), list %p has count %d",
+		 list->my_cache->cc_relname, list->my_cache->id,
+		 list, list->refcount);
+}
-- 
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