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authorSZEDER Gábor <szeder.dev@gmail.com>2018-10-15 00:01:48 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-10-15 03:53:15 (GMT)
commit6afedba8c97b5a8463e45ff801218433f8392d5d (patch)
tree6d1c7df8be75da5a6653d18ea42204978a336d23 /contrib/coccinelle
parentf84b9b09d40408cf91bbc500d9f190a7866c3e0f (diff)
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object_id.cocci: match only expressions of type 'struct object_id'
Most of our semantic patches in 'contrib/coccinelle/object_id.cocci' turn calls of SHA1-specific functions into calls of their corresponding object_id counterparts, e.g. sha1_to_hex() to oid_to_hex(). These semantic patches look something like this: @@ expression E1; @@ - sha1_to_hex(E1.hash) + oid_to_hex(&E1) and match the access to the 'hash' field in any data type, not only in 'struct object_id', and, consquently, can produce wrong transformations. Case in point is the recent hash function transition patch "rerere: convert to use the_hash_algo" [1], which, among other things, renamed 'struct rerere_dir's 'sha1' field to 'hash', and then 'make coccicheck' started to suggest the following wrong transformations for 'rerere.c' [2]: - return sha1_to_hex(id->collection->hash); + return oid_to_hex(id->collection); and - DIR *dir = opendir(git_path("rr-cache/%s", sha1_to_hex(rr_dir->hash))); + DIR *dir = opendir(git_path("rr-cache/%s", oid_to_hex(rr_dir))); Avoid such wrong transformations by tightening semantic patches in 'object_id.cocci' to match only type of or pointers to 'struct object_id'. [1] https://public-inbox.org/git/20181008215701.779099-15-sandals@crustytoothpaste.net/ [2] https://travis-ci.org/git/git/jobs/440463476#L580 Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'contrib/coccinelle')
-rw-r--r--contrib/coccinelle/object_id.cocci117
1 files changed, 63 insertions, 54 deletions
diff --git a/contrib/coccinelle/object_id.cocci b/contrib/coccinelle/object_id.cocci
index d8bdb48..6a7cf3e 100644
--- a/contrib/coccinelle/object_id.cocci
+++ b/contrib/coccinelle/object_id.cocci
@@ -1,119 +1,127 @@
@@
-expression E1;
+struct object_id OID;
@@
-- is_null_sha1(E1.hash)
-+ is_null_oid(&E1)
+- is_null_sha1(OID.hash)
++ is_null_oid(&OID)
@@
-expression E1;
+struct object_id *OIDPTR;
@@
-- is_null_sha1(E1->hash)
-+ is_null_oid(E1)
+- is_null_sha1(OIDPTR->hash)
++ is_null_oid(OIDPTR)
@@
-expression E1;
+struct object_id OID;
@@
-- sha1_to_hex(E1.hash)
-+ oid_to_hex(&E1)
+- sha1_to_hex(OID.hash)
++ oid_to_hex(&OID)
@@
identifier f != oid_to_hex;
-expression E1;
+struct object_id *OIDPTR;
@@
f(...) {<...
-- sha1_to_hex(E1->hash)
-+ oid_to_hex(E1)
+- sha1_to_hex(OIDPTR->hash)
++ oid_to_hex(OIDPTR)
...>}
@@
-expression E1, E2;
+expression E;
+struct object_id OID;
@@
-- sha1_to_hex_r(E1, E2.hash)
-+ oid_to_hex_r(E1, &E2)
+- sha1_to_hex_r(E, OID.hash)
++ oid_to_hex_r(E, &OID)
@@
identifier f != oid_to_hex_r;
-expression E1, E2;
+expression E;
+struct object_id *OIDPTR;
@@
f(...) {<...
-- sha1_to_hex_r(E1, E2->hash)
-+ oid_to_hex_r(E1, E2)
+- sha1_to_hex_r(E, OIDPTR->hash)
++ oid_to_hex_r(E, OIDPTR)
...>}
@@
-expression E1;
+struct object_id OID;
@@
-- hashclr(E1.hash)
-+ oidclr(&E1)
+- hashclr(OID.hash)
++ oidclr(&OID)
@@
identifier f != oidclr;
-expression E1;
+struct object_id *OIDPTR;
@@
f(...) {<...
-- hashclr(E1->hash)
-+ oidclr(E1)
+- hashclr(OIDPTR->hash)
++ oidclr(OIDPTR)
...>}
@@
-expression E1, E2;
+struct object_id OID1, OID2;
@@
-- hashcmp(E1.hash, E2.hash)
-+ oidcmp(&E1, &E2)
+- hashcmp(OID1.hash, OID2.hash)
++ oidcmp(&OID1, &OID2)
@@
identifier f != oidcmp;
-expression E1, E2;
+struct object_id *OIDPTR1, OIDPTR2;
@@
f(...) {<...
-- hashcmp(E1->hash, E2->hash)
-+ oidcmp(E1, E2)
+- hashcmp(OIDPTR1->hash, OIDPTR2->hash)
++ oidcmp(OIDPTR1, OIDPTR2)
...>}
@@
-expression E1, E2;
+struct object_id *OIDPTR;
+struct object_id OID;
@@
-- hashcmp(E1->hash, E2.hash)
-+ oidcmp(E1, &E2)
+- hashcmp(OIDPTR->hash, OID.hash)
++ oidcmp(OIDPTR, &OID)
@@
-expression E1, E2;
+struct object_id *OIDPTR;
+struct object_id OID;
@@
-- hashcmp(E1.hash, E2->hash)
-+ oidcmp(&E1, E2)
+- hashcmp(OID.hash, OIDPTR->hash)
++ oidcmp(&OID, OIDPTR)
@@
-expression E1, E2;
+struct object_id OID1, OID2;
@@
-- hashcpy(E1.hash, E2.hash)
-+ oidcpy(&E1, &E2)
+- hashcpy(OID1.hash, OID2.hash)
++ oidcpy(&OID1, &OID2)
@@
identifier f != oidcpy;
-expression E1, E2;
+struct object_id *OIDPTR1;
+struct object_id *OIDPTR2;
@@
f(...) {<...
-- hashcpy(E1->hash, E2->hash)
-+ oidcpy(E1, E2)
+- hashcpy(OIDPTR1->hash, OIDPTR2->hash)
++ oidcpy(OIDPTR1, OIDPTR2)
...>}
@@
-expression E1, E2;
+struct object_id *OIDPTR;
+struct object_id OID;
@@
-- hashcpy(E1->hash, E2.hash)
-+ oidcpy(E1, &E2)
+- hashcpy(OIDPTR->hash, OID.hash)
++ oidcpy(OIDPTR, &OID)
@@
-expression E1, E2;
+struct object_id *OIDPTR;
+struct object_id OID;
@@
-- hashcpy(E1.hash, E2->hash)
-+ oidcpy(&E1, E2)
+- hashcpy(OID.hash, OIDPTR->hash)
++ oidcpy(&OID, OIDPTR)
@@
-expression E1, E2;
+struct object_id *OIDPTR1;
+struct object_id *OIDPTR2;
@@
-- oidcmp(E1, E2) == 0
-+ oideq(E1, E2)
+- oidcmp(OIDPTR1, OIDPTR2) == 0
++ oideq(OIDPTR1, OIDPTR2)
@@
identifier f != hasheq;
@@ -125,10 +133,11 @@ expression E1, E2;
...>}
@@
-expression E1, E2;
+struct object_id *OIDPTR1;
+struct object_id *OIDPTR2;
@@
-- oidcmp(E1, E2) != 0
-+ !oideq(E1, E2)
+- oidcmp(OIDPTR1, OIDPTR2) != 0
++ !oideq(OIDPTR1, OIDPTR2)
@@
identifier f != hasheq;