diff options
author | Jason Ekstrand <[email protected]> | 2019-06-05 16:56:20 -0500 |
---|---|---|
committer | Jason Ekstrand <[email protected]> | 2019-06-06 00:27:53 +0000 |
commit | 8306dabc03c9a030cacd078b56446e6548224a23 (patch) | |
tree | 7ebf83403956268d5ba78adee5eee5e149e213d5 /src/util/set.c | |
parent | 7a18ce0b9119898b6d58b8e76495a40a9fe71765 (diff) |
util/set: Assert that keys are not reserved pointers
If we insert a NULL key, it will appear to succeed but will mess up
entry counting. Similar errors can occur if someone accidentally
inserts the deleted key. The later is highly unlikely but technically
possible so we should guard against it too.
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Caio Marcelo de Oliveira Filho <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>
Diffstat (limited to 'src/util/set.c')
-rw-r--r-- | src/util/set.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/util/set.c b/src/util/set.c index 4788b94324a..5173c24474c 100644 --- a/src/util/set.c +++ b/src/util/set.c @@ -92,6 +92,12 @@ static const struct { ENTRY(2147483648ul, 2362232233ul, 2362232231ul ) }; +static inline bool +key_pointer_is_reserved(const void *key) +{ + return key == NULL || key == deleted_key; +} + static int entry_is_free(struct set_entry *entry) { @@ -214,6 +220,8 @@ _mesa_set_clear(struct set *set, void (*delete_function)(struct set_entry *entry static struct set_entry * set_search(const struct set *ht, uint32_t hash, const void *key) { + assert(!key_pointer_is_reserved(key)); + uint32_t size = ht->size; uint32_t start_address = util_fast_urem32(hash, size, ht->size_magic); uint32_t double_hash = util_fast_urem32(hash, ht->rehash, @@ -337,6 +345,8 @@ set_search_or_add(struct set *ht, uint32_t hash, const void *key, bool *found) { struct set_entry *available_entry = NULL; + assert(!key_pointer_is_reserved(key)); + if (ht->entries >= ht->max_entries) { set_rehash(ht, ht->size_index + 1); } else if (ht->deleted_entries + ht->entries >= ht->max_entries) { |