| /// Remove casting the values returned by memory allocation functions | |
| /// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc. | |
| /// | |
| //# This makes an effort to find cases of casting of values returned by | |
| //# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc, | |
| //# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes | |
| //# the casting as it is not required. The result in the patch case may | |
| //#need some reformatting. | |
| // | |
| // Confidence: High | |
| // Copyright: 2014, Himangi Saraogi GPLv2. | |
| // Comments: | |
| // Options: --no-includes --include-headers | |
| // | |
| virtual context | |
| virtual patch | |
| virtual org | |
| virtual report | |
| //---------------------------------------------------------- | |
| // For context mode | |
| //---------------------------------------------------------- | |
| @depends on context@ | |
| type T; | |
| @@ | |
| * (T *) | |
| \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| | |
| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...) | |
| //---------------------------------------------------------- | |
| // For patch mode | |
| //---------------------------------------------------------- | |
| @depends on patch@ | |
| type T; | |
| @@ | |
| - (T *) | |
| (\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| | |
| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...)) | |
| //---------------------------------------------------------- | |
| // For org and report mode | |
| //---------------------------------------------------------- | |
| @r depends on org || report@ | |
| type T; | |
| position p; | |
| @@ | |
| (T@p *)\(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| | |
| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...) | |
| @script:python depends on org@ | |
| p << r.p; | |
| t << r.T; | |
| @@ | |
| coccilib.org.print_safe_todo(p[0], t) | |
| @script:python depends on report@ | |
| p << r.p; | |
| t << r.T; | |
| @@ | |
| msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t) | |
| coccilib.report.print_report(p[0], msg) | |