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Add more sanity-checking to PageAddItem and PageIndexTupleDelete,

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to prevent spreading of corruption when page header pointers are bad.
Merge PageZero into PageInit, since it was never used separately, and
remove separate memset calls used at most other PageInit call points.
Remove IndexPageCleanup, which wasn't used at all.
This commit is contained in:
Tom Lane
2002-01-15 22:14:17 +00:00
parent 685a66cdfe
commit aa00e6134e
7 changed files with 94 additions and 144 deletions
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14
src/backend/access/hash/hashpage.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashpage.c,v 1.33 2001/10/25 05:49:21 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashpage.c,v 1.34 2002/01/15 22:14:16 tgl Exp $
*
* NOTES
* Postgres hash pages look like ordinary relation pages. The opaque
@@ -301,17 +301,7 @@ _hash_chgbufaccess(Relation rel,
void
_hash_pageinit(Page page, Size size)
{
Assert(((PageHeader) page)->pd_lower == 0);
Assert(((PageHeader) page)->pd_upper == 0);
Assert(((PageHeader) page)->pd_special == 0);
/*
* Cargo-cult programming -- don't really need this to be zero, but
* creating new pages is an infrequent occurrence and it makes me feel
* good when I know they're empty.
*/
MemSet(page, 0, size);
Assert(PageIsNew(page));
PageInit(page, size, sizeof(HashPageOpaqueData));
}