There are kinds of memcpy() that are error-prone. Its replacement with a struct assignment is prefered because it's type-safe and much easier to read. This semantic patch looks for memcpy() that can be replaced by struct assignment. Inspired by patches sent by Ezequiel Garcia <elezegarcia@xxxxxxxxx> Signed-off-by: Peter Senna Tschudin <peter.senna@xxxxxxxxx> --- scripts/coccinelle/misc/memcpy-assign.cocci | 103 ++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 scripts/coccinelle/misc/memcpy-assign.cocci diff --git a/scripts/coccinelle/misc/memcpy-assign.cocci b/scripts/coccinelle/misc/memcpy-assign.cocci new file mode 100644 index 0000000..5c1fd75 --- /dev/null +++ b/scripts/coccinelle/misc/memcpy-assign.cocci @@ -0,0 +1,103 @@ +// +// Replace memcpy with struct assignment. +// +// Confidence: Moderate +// Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6. GPLv2. +// URL: http://coccinelle.lip6.fr/ +// Comments: +// Options: --no-includes --include-headers + +virtual patch +virtual report +virtual context +virtual org + +@r1 depends on !patch@ +identifier struct_name; +struct struct_name to; +struct struct_name from; +struct struct_name *top; +struct struct_name *fromp; +position p; +@@ +memcpy@p(\(&(to)\|top\), \(&(from)\|fromp\), \(sizeof(to)\|sizeof(from)\|sizeof(struct struct_name)\|sizeof(*top)\|sizeof(*fromp)\)) + +@script:python depends on report@ +p << r1.p; +@@ +coccilib.report.print_report(p[0],"Replace memcpy with struct assignment") + +@depends on context@ +position r1.p; +@@ +*memcpy@p(...); + +@script:python depends on org@ +p << r1.p; +@@ +cocci.print_main("Replace memcpy with struct assignment",p) + +@depends on patch@ +identifier struct_name; +struct struct_name to; +struct struct_name from; +@@ +( +-memcpy(&(to), &(from), sizeof(to)); ++to = from; +| +-memcpy(&(to), &(from), sizeof(from)); ++to = from; +| +-memcpy(&(to), &(from), sizeof(struct struct_name)); ++to = from; +) + +@depends on patch@ +identifier struct_name; +struct struct_name to; +struct struct_name *from; +@@ +( +-memcpy(&(to), from, sizeof(to)); ++to = *from; +| +-memcpy(&(to), from, sizeof(*from)); ++to = *from; +| +-memcpy(&(to), from, sizeof(struct struct_name)); ++to = *from; +) + +@depends on patch@ +identifier struct_name; +struct struct_name *to; +struct struct_name from; +@@ +( +-memcpy(to, &(from), sizeof(*to)); ++ *to = from; +| +-memcpy(to, &(from), sizeof(from)); ++ *to = from; +| +-memcpy(to, &(from), sizeof(struct struct_name)); ++ *to = from; +) + +@depends on patch@ +identifier struct_name; +struct struct_name *to; +struct struct_name *from; +@@ +( +-memcpy(to, from, sizeof(*to)); ++ *to = *from; +| +-memcpy(to, from, sizeof(*from)); ++ *to = *from; +| +-memcpy(to, from, sizeof(struct struct_name)); ++ *to = *from; +) + -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
