diff options
| -rw-r--r-- | scripts/coccinelle/misc/badty.cocci | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/badty.cocci b/scripts/coccinelle/misc/badty.cocci new file mode 100644 index 0000000..2fc06fc --- /dev/null +++ b/scripts/coccinelle/misc/badty.cocci @@ -0,0 +1,76 @@ +/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element +/// +//# This makes an effort to find cases where the argument to sizeof is wrong +//# in memory allocation functions by checking the type of the allocated memory +//# when it is a double pointer and ensuring the sizeof argument takes a pointer +//# to the the memory being allocated. There are false positives in cases the +//# sizeof argument is not used in constructing the return value. The result +//# may need some reformatting. +// +// Confidence: Moderate +// Copyright: (C) 2014 Himangi Saraogi. GPLv2. +// Comments: +// Options: + +virtual patch +virtual context +virtual org +virtual report + +//---------------------------------------------------------- +// For context mode +//---------------------------------------------------------- + +@depends on context disable sizeof_type_expr@ +type T; +T **x; +@@ + + x = + <+...sizeof( +* T + )...+> + +//---------------------------------------------------------- +// For patch mode +//---------------------------------------------------------- + +@depends on patch disable sizeof_type_expr@ +type T; +T **x; +@@ + + x = + <+...sizeof( +- T ++ *x + )...+> + +//---------------------------------------------------------- +// For org and report mode +//---------------------------------------------------------- + +@r disable sizeof_type_expr@ +type T; +T **x; +position p; +@@ + + x = + <+...sizeof( + T@p + )...+> + +@script:python depends on org@ +p << r.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING sizeof argument should be pointer type, not structure type") + +@script:python depends on report@ +p << r.p; +@@ + +msg="WARNING: Use correct pointer type argument for sizeof" +coccilib.report.print_report(p[0], msg) + |
