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coccicheck: detect hashmap_entry.hash assignment

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Assigning hashmap_entry.hash manually leaves hashmap_entry.next
uninitialized, which can be dangerous once the hashmap_entry is
inserted into a hashmap.   Detect those assignments and use
hashmap_entry_init, instead.

Signed-off-by: Eric Wong <e@80x24.org>
Reviewed-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Wong 2019-10-06 23:30:25 +00:00 committed by Junio C Hamano
parent e010a41216
commit 12878c8351
1 changed files with 16 additions and 0 deletions
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16
contrib/coccinelle/hashmap.cocci Normal file
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@ -0,0 +1,16 @@
@ hashmap_entry_init_usage @
expression E;
struct hashmap_entry HME;
@@
- HME.hash = E;
+ hashmap_entry_init(&HME, E);
@@
identifier f !~ "^hashmap_entry_init$";
expression E;
struct hashmap_entry *HMEP;
@@
f(...) {<...
- HMEP->hash = E;
+ hashmap_entry_init(HMEP, E);
...>}