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fix bug in hashindex_set on resize, fixes #4829

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the problem was that after a resize that was triggered by too few
empty buckets, the rebuilt new hash table had entries at different
positions than before, but the idx where to SET the entry was not
recomputed afterwards.
This commit is contained in:
Thomas Waldmann 2020-03-01 16:31:32 +01:00
parent 29de980c91
commit 701159ac9d
1 changed files with 10 additions and 0 deletions
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10
src/borg/_hashindex.c
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@ -562,6 +562,16 @@ hashindex_set(HashIndex *index, const void *key, const void *value)
if(!hashindex_resize(index, index->num_buckets)) {
return 0;
}
/* we have just built a fresh hashtable and removed all tombstones,
* so we only have EMPTY or USED buckets, but no DELETED ones any more.
*/
idx = start_idx = hashindex_index(index, key);
while(!BUCKET_IS_EMPTY(index, idx)) {
idx++;
if (idx >= index->num_buckets){
idx -= index->num_buckets;
}
}
}
}
ptr = BUCKET_ADDR(index, idx);