[Cocci] Analysis for Linux source files

SF Markus Elfring
2013-04-02T12:14:53Z

> Without your semantic patch and some example code, I don't know.

I let the following SmPL filter pattern run on source files from the current
Linux 3.8.5.
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git

elfring at Sonne:~/Projekte/Coccinelle/lokal/demos/pass-through> cat
list_pass-through_functions.cocci
@initialize:python@
import sys
result = []
mark = ['"', '', '"']
delimiter = '|'

def store_positions(fun, typ, pt_param, places, data_structure = ""):
"""Add source code positions to an internal list."""

for place in places:

fields = []

fields.append(fun.ident)

mark[1] = typ

fields.append(''.join(mark))

fields.append(pt_param.ident)

fields.append(data_structure)

mark[1] = place.file.replace('"', '""')

fields.append(''.join(mark))

fields.append(place.line)

fields.append(str(int(place.column) + 1))

result.append(delimiter.join(fields))

@is_pass_through@

identifier pt_function, input;
type data_type;
position pos;
@@
data_type at pos pt_function(...,data_type input,...)
{
<+...
return input;
...+>
}

@is_pass_through_member_candidate@
identifier pt_function, input, tag;
type data_type;
position pos;
@@
struct tag
{
...
data_type at pos (*pt_function)(...,data_type input,...);
...
}

@script:python collection1 depends on is_pass_through@
typ << is_pass_through.data_type;
fun << is_pass_through.pt_function;
pt_param << is_pass_through.input;
places << is_pass_through.pos;
@@
store_positions(fun, typ, pt_param, places)

@script:python collection2 depends on is_pass_through_member_candidate@
tag << is_pass_through_member_candidate.tag;
typ << is_pass_through_member_candidate.data_type;
fun << is_pass_through_member_candidate.pt_function;
pt_param << is_pass_through_member_candidate.input;
places << is_pass_through_member_candidate.pos;
@@
store_positions(fun, typ, pt_param, places, tag)

@finalize:python@
if result:
result.insert(0, delimiter.join(("function", '"data type"', "parameter",
'"contained in"', '"source file"', "line", "column")))
print("\r\n".join(result))
else:
sys.stderr.write("No result for this analysis!\n")

Regards,
Markus