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Avoid memcpy() with same source and destination address. 

The behavior of that is undefined, although unlikely to lead to problems in
practice.

Found by running regression tests with Valgrind.
This commit is contained in:
Heikki Linnakangas 2014-03-07 13:13:33 +02:00
parent 2b8483d69d
commit ad7b48ea08
2 changed files with 6 additions and 6 deletions
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9
src/backend/tsearch/dict_ispell.c
View File

@ -126,20 +126,19 @@ dispell_lexize(PG_FUNCTION_ARGS)
if (res == NULL)
PG_RETURN_POINTER(NULL);
ptr = cptr = res;
while (ptr->lexeme)
cptr = res;
for (ptr = cptr; ptr->lexeme; ptr++)
{
if (searchstoplist(&(d->stoplist), ptr->lexeme))
{
pfree(ptr->lexeme);
ptr->lexeme = NULL;
ptr++;
}
else
{
memcpy(cptr, ptr, sizeof(TSLexeme));
if (cptr != ptr)
memcpy(cptr, ptr, sizeof(TSLexeme));
cptr++;
ptr++;
}
}
cptr->lexeme = NULL;

3
src/backend/utils/adt/tsvector.c
View File

@ -124,7 +124,8 @@ uniqueentry(WordEntryIN *a, int l, char *buf, int *outbuflen)
buflen += res->poslen * sizeof(WordEntryPos) + sizeof(uint16);
}
res++;
memcpy(res, ptr, sizeof(WordEntryIN));
if (res != ptr)
memcpy(res, ptr, sizeof(WordEntryIN));
}
else if (ptr->entry.haspos)
{