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Commitb619cb0

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iBrought in a fix for backend crashes
Submitted by: "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
1 parent00fe588 commitb619cb0

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2 files changed

+21
-18
lines changed

2 files changed

+21
-18
lines changed

‎src/backend/storage/buf_internals.h‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
*
77
* Copyright (c) 1994, Regents of the University of California
88
*
9-
* $Id: buf_internals.h,v 1.2 1996/07/22 22:59:42 scrappy Exp $
9+
* $Id: buf_internals.h,v 1.3 1996/07/23 05:43:11 scrappy Exp $
1010
*
1111
* NOTE
1212
*If BUFFERPAGE0 is defined, then 0 will be used as a
@@ -118,8 +118,8 @@ struct sbufdesc {
118118
int16bufsmgr;/* storage manager id for buffer */
119119
unsignedrefcount;/* # of times buffer is pinned */
120120

121-
char*sb_dbname;/* name of db in which buf belongs */
122-
char*sb_relname;/* name of reln */
121+
charsb_dbname[NAMEDATALEN+1];/* name of db in which buf belongs */
122+
charsb_relname[NAMEDATALEN+1];/* name of reln */
123123
#ifdefHAS_TEST_AND_SET
124124
/* can afford a dedicated lock if test-and-set locks are available */
125125
slock_tio_in_progress_lock;
@@ -164,7 +164,7 @@ struct sbufdesc {
164164

165165
#if defined(PORTNAME_BSD44_derived)|| \
166166
defined(PORTNAME_bsdi)|| \
167-
defined(PORTNAME_i86pc_solaris)|| \
167+
defined(PORTNAME_i386_solaris)|| \
168168
defined(PORTNAME_linux)|| \
169169
defined(PORTNAME_sparc)|| \
170170
defined(PORTNAME_sparc_solaris)

‎src/backend/storage/buffer/bufmgr.c‎

Lines changed: 17 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.1.1.1 1996/07/09 06:21:54 scrappy Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.2 1996/07/23 05:44:10 scrappy Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -485,20 +485,23 @@ BufferAlloc(Relation reln,
485485
}
486486
}
487487

488+
if (buf!=NULL )
489+
{
488490
#ifdefHAS_TEST_AND_SET
489-
S_UNLOCK(&(buf->io_in_progress_lock));
491+
S_UNLOCK(&(buf->io_in_progress_lock));
490492
#else/* !HAS_TEST_AND_SET */
491-
if (buf->refcount>1)
492-
SignalIO(buf);
493+
if (buf->refcount>1)
494+
SignalIO(buf);
493495
#endif/* !HAS_TEST_AND_SET */
494496

495497
/* give up the buffer since we don't need it any more */
496-
buf->refcount--;
497-
PrivateRefCount[BufferDescriptorGetBuffer(buf)-1]=0;
498-
AddBufferToFreelist(buf);
499-
buf->flags |=BM_FREE;
500-
buf->flags &= ~BM_DIRTY;
501-
buf->flags &= ~BM_IO_IN_PROGRESS;
498+
buf->refcount--;
499+
PrivateRefCount[BufferDescriptorGetBuffer(buf)-1]=0;
500+
AddBufferToFreelist(buf);
501+
buf->flags |=BM_FREE;
502+
buf->flags &= ~BM_DIRTY;
503+
buf->flags &= ~BM_IO_IN_PROGRESS;
504+
}
502505

503506
SpinRelease(BufMgrLock);
504507

@@ -537,8 +540,8 @@ BufferAlloc(Relation reln,
537540
}
538541

539542
/* record the database name and relation name for this buffer */
540-
buf->sb_relname=pstrdup(reln->rd_rel->relname.data);
541-
buf->sb_dbname=pstrdup(GetDatabaseName());
543+
strcpy (buf->sb_relname,reln->rd_rel->relname.data);
544+
strcpy (buf->sb_dbname,GetDatabaseName());
542545

543546
/* remember which storage manager is responsible for it */
544547
buf->bufsmgr=reln->rd_rel->relsmgr;
@@ -1248,7 +1251,7 @@ PrintBufferDescs()
12481251
elog(NOTICE,"[%02d] (freeNext=%d, freePrev=%d, relname=%.*s, \
12491252
blockNum=%d, flags=0x%x, refcount=%d %d)",
12501253
i,buf->freeNext,buf->freePrev,NAMEDATALEN,
1251-
&(buf->sb_relname),buf->tag.blockNum,buf->flags,
1254+
buf->sb_relname,buf->tag.blockNum,buf->flags,
12521255
buf->refcount,PrivateRefCount[i]);
12531256
}
12541257
SpinRelease(BufMgrLock);
@@ -1273,7 +1276,7 @@ PrintPinnedBufs()
12731276
if (PrivateRefCount[i]>0)
12741277
elog(NOTICE,"[%02d] (freeNext=%d, freePrev=%d, relname=%.*s, \
12751278
blockNum=%d, flags=0x%x, refcount=%d %d)\n",
1276-
i,buf->freeNext,buf->freePrev,NAMEDATALEN,&(buf->sb_relname),
1279+
i,buf->freeNext,buf->freePrev,NAMEDATALEN,buf->sb_relname,
12771280
buf->tag.blockNum,buf->flags,
12781281
buf->refcount,PrivateRefCount[i]);
12791282
}

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