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Fix memory leaks in GIN index vacuum.

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Per bug #12850 by Walter Nordmann. Backpatch to 9.4 where the leak was
introduced.
This commit is contained in:
Heikki Linnakangas
2015-03-12 15:29:58 +01:00
parent f4abd0241d
commit 26d2c5dc8d
1 changed files with 20 additions and 14 deletions
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34
src/backend/access/gin/ginvacuum.c
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@ -432,27 +432,32 @@ ginVacuumEntryPage(GinVacuumState *gvs, Buffer buffer, BlockNumber *roots, uint3
else if (GinGetNPosting(itup) > 0)
{
int nitems;
ItemPointer uncompressed;
ItemPointer items_orig;
bool free_items_orig;
ItemPointer items;
/*
* Vacuum posting list with proper function for compressed and
* uncompressed format.
*/
/* Get list of item pointers from the tuple. */
if (GinItupIsCompressed(itup))
uncompressed = ginPostingListDecode((GinPostingList *) GinGetPosting(itup), &nitems);
{
items_orig = ginPostingListDecode((GinPostingList *) GinGetPosting(itup), &nitems);
free_items_orig = true;
}
else
{
uncompressed = (ItemPointer) GinGetPosting(itup);
items_orig = (ItemPointer) GinGetPosting(itup);
nitems = GinGetNPosting(itup);
free_items_orig = false;
}
uncompressed = ginVacuumItemPointers(gvs, uncompressed, nitems,
&nitems);
if (uncompressed)
/* Remove any items from the list that need to be vacuumed. */
items = ginVacuumItemPointers(gvs, items_orig, nitems, &nitems);
if (free_items_orig)
pfree(items_orig);
/* If any item pointers were removed, recreate the tuple. */
if (items)
{
/*
* Some ItemPointers were deleted, recreate tuple.
*/
OffsetNumber attnum;
Datum key;
GinNullCategory category;
@ -461,7 +466,7 @@ ginVacuumEntryPage(GinVacuumState *gvs, Buffer buffer, BlockNumber *roots, uint3
if (nitems > 0)
{
plist = ginCompressPostingList(uncompressed, nitems, GinMaxItemSize, NULL);
plist = ginCompressPostingList(items, nitems, GinMaxItemSize, NULL);
plistsize = SizeOfGinPostingList(plist);
}
else
@ -500,6 +505,7 @@ ginVacuumEntryPage(GinVacuumState *gvs, Buffer buffer, BlockNumber *roots, uint3
RelationGetRelationName(gvs->index));
pfree(itup);
pfree(items);
}
}
}