| /// |
| /// Use kzalloc rather than kmalloc followed by memset with 0 |
| /// |
| /// This considers some simple cases that are common and easy to validate |
| /// Note in particular that there are no ...s in the rule, so all of the |
| /// matched code has to be contiguous |
| /// |
| // Confidence: High |
| // Copyright: (C) 2009-2010 Julia Lawall, Nicolas Palix, DIKU. GPLv2. |
| // Copyright: (C) 2009-2010 Gilles Muller, INRIA/LiP6. GPLv2. |
| // URL: http://coccinelle.lip6.fr/rules/kzalloc.html |
| // Options: -no_includes -include_headers |
| // |
| // Keywords: kmalloc, kzalloc |
| // Version min: < 2.6.12 kmalloc |
| // Version min: 2.6.14 kzalloc |
| // |
| |
| virtual context |
| virtual patch |
| virtual org |
| virtual report |
| |
| //---------------------------------------------------------- |
| // For context mode |
| //---------------------------------------------------------- |
| |
| @depends on context@ |
| type T, T2; |
| expression x; |
| expression E1,E2; |
| statement S; |
| @@ |
| |
| * x = (T)kmalloc(E1,E2); |
| if ((x==NULL) || ...) S |
| * memset((T2)x,0,E1); |
| |
| //---------------------------------------------------------- |
| // For patch mode |
| //---------------------------------------------------------- |
| |
| @depends on patch@ |
| type T, T2; |
| expression x; |
| expression E1,E2; |
| statement S; |
| @@ |
| |
| - x = (T)kmalloc(E1,E2); |
| + x = kzalloc(E1,E2); |
| if ((x==NULL) || ...) S |
| - memset((T2)x,0,E1); |
| |
| //---------------------------------------------------------- |
| // For org mode |
| //---------------------------------------------------------- |
| |
| @r depends on org || report@ |
| type T, T2; |
| expression x; |
| expression E1,E2; |
| statement S; |
| position p; |
| @@ |
| |
| x = (T)kmalloc@p(E1,E2); |
| if ((x==NULL) || ...) S |
| memset((T2)x,0,E1); |
| |
| @script:python depends on org@ |
| p << r.p; |
| x << r.x; |
| @@ |
| |
| msg="%s" % (x) |
| msg_safe=msg.replace("[","@(").replace("]",")") |
| coccilib.org.print_todo(p[0], msg_safe) |
| |
| @script:python depends on report@ |
| p << r.p; |
| x << r.x; |
| @@ |
| |
| msg="WARNING: kzalloc should be used for %s, instead of kmalloc/memset" % (x) |
| coccilib.report.print_report(p[0], msg) |