| Himangi Saraogi | 99fcec3 | 2014-06-14 21:15:41 +0530 | [diff] [blame] | 1 | /// Remove casting the values returned by memory allocation functions |
| 2 | /// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc. |
| 3 | /// |
| 4 | //# This makes an effort to find cases of casting of values returned by |
| 5 | //# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc, |
| 6 | //# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes |
| 7 | //# the casting as it is not required. The result in the patch case may |
| 8 | //#need some reformatting. |
| 9 | // |
| 10 | // Confidence: High |
| 11 | // Copyright: 2014, Himangi Saraogi GPLv2. |
| 12 | // Comments: |
| 13 | // Options: --no-includes --include-headers |
| 14 | // |
| 15 | |
| 16 | virtual context |
| 17 | virtual patch |
| 18 | virtual org |
| 19 | virtual report |
| 20 | |
| 21 | //---------------------------------------------------------- |
| 22 | // For context mode |
| 23 | //---------------------------------------------------------- |
| 24 | |
| 25 | @depends on context@ |
| 26 | type T; |
| 27 | @@ |
| 28 | |
| 29 | * (T *) |
| 30 | \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| |
| 31 | kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...) |
| 32 | |
| 33 | //---------------------------------------------------------- |
| 34 | // For patch mode |
| 35 | //---------------------------------------------------------- |
| 36 | |
| 37 | @depends on patch@ |
| 38 | type T; |
| 39 | @@ |
| 40 | |
| 41 | - (T *) |
| 42 | (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| |
| 43 | kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)) |
| 44 | |
| 45 | //---------------------------------------------------------- |
| 46 | // For org and report mode |
| 47 | //---------------------------------------------------------- |
| 48 | |
| 49 | @r depends on org || report@ |
| 50 | type T; |
| 51 | position p; |
| 52 | @@ |
| 53 | |
| 54 | (T@p *)\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| |
| 55 | kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...) |
| 56 | |
| 57 | @script:python depends on org@ |
| 58 | p << r.p; |
| 59 | t << r.T; |
| 60 | @@ |
| 61 | |
| 62 | coccilib.org.print_safe_todo(p[0], t) |
| 63 | |
| 64 | @script:python depends on report@ |
| 65 | p << r.p; |
| 66 | t << r.T; |
| 67 | @@ |
| 68 | |
| 69 | msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t) |
| 70 | coccilib.report.print_report(p[0], msg) |
| 71 | |
| 72 | |