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First stage of reclaiming memory in executor by resetting short-term

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memory contexts.  Currently, only leaks in expressions executed as
quals or projections are handled.  Clean up some old dead cruft in
executor while at it --- unused fields in state nodes, that sort of thing.
This commit is contained in:
Tom Lane
2000-07-12 02:37:39 +00:00
parent 46fb9c29e2
commit badce86a2c
53 changed files with 1536 additions and 1584 deletions
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13
src/backend/utils/mmgr/aset.c
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@@ -11,7 +11,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/aset.c,v 1.29 2000/07/11 14:30:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/aset.c,v 1.30 2000/07/12 02:37:23 tgl Exp $
*
* NOTE:
* This is a new (Feb. 05, 1999) implementation of the allocation set
@@ -349,20 +349,21 @@ AllocSetReset(MemoryContext context)
if (block == set->keeper)
{
/* Reset the block, but don't return it to malloc */
block->next = NULL;
block->freeptr = ((char *) block) + ALLOC_BLOCKHDRSZ;
char *datastart = ((char *) block) + ALLOC_BLOCKHDRSZ;
#ifdef CLOBBER_FREED_MEMORY
/* Wipe freed memory for debugging purposes */
memset(block->freeptr, 0x7F,
((char *) block->endptr) - ((char *) block->freeptr));
memset(datastart, 0x7F, ((char *) block->freeptr) - datastart);
#endif
block->freeptr = datastart;
block->next = NULL;
}
else
{
/* Normal case, release the block */
#ifdef CLOBBER_FREED_MEMORY
/* Wipe freed memory for debugging purposes */
memset(block, 0x7F, ((char *) block->endptr) - ((char *) block));
memset(block, 0x7F, ((char *) block->freeptr) - ((char *) block));
#endif
free(block);
}