diff options
Diffstat (limited to 'scripts/coccinelle/api/alloc')
| -rw-r--r-- | scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci | 67 | ||||
| -rw-r--r-- | scripts/coccinelle/api/alloc/kzalloc-simple.cocci | 86 |
2 files changed, 153 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci b/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci new file mode 100644 index 00000000..7d4771d4 --- /dev/null +++ b/scripts/coccinelle/api/alloc/drop_kmalloc_cast.cocci @@ -0,0 +1,67 @@ +/// +/// Casting (void *) value returned by kmalloc is useless +/// as mentioned in Documentation/CodingStyle, Chap 14. +/// +// Confidence: High +// Copyright: 2009,2010 Nicolas Palix, DIKU. GPLv2. +// URL: http://coccinelle.lip6.fr/ +// Options: -no_includes -include_headers +// +// Keywords: kmalloc, kzalloc, kcalloc +// Version min: < 2.6.12 kmalloc +// Version min: < 2.6.12 kcalloc +// Version min: 2.6.14 kzalloc +// + +virtual context +virtual patch +virtual org +virtual report + +//---------------------------------------------------------- +// For context mode +//---------------------------------------------------------- + +@depends on context@ +type T; +@@ + +* (T *) + \(kmalloc\|kzalloc\|kcalloc\)(...) + +//---------------------------------------------------------- +// For patch mode +//---------------------------------------------------------- + +@depends on patch@ +type T; +@@ + +- (T *) + \(kmalloc\|kzalloc\|kcalloc\)(...) + +//---------------------------------------------------------- +// For org and report mode +//---------------------------------------------------------- + +@r depends on org || report@ +type T; +position p; +@@ + + (T@p *)\(kmalloc\|kzalloc\|kcalloc\)(...) + +@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 k[cmz]alloc to (%s *) is useless." % (t) +coccilib.report.print_report(p[0], msg) diff --git a/scripts/coccinelle/api/alloc/kzalloc-simple.cocci b/scripts/coccinelle/api/alloc/kzalloc-simple.cocci new file mode 100644 index 00000000..046b9b16 --- /dev/null +++ b/scripts/coccinelle/api/alloc/kzalloc-simple.cocci @@ -0,0 +1,86 @@ +/// +/// 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) |