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Date: Sat, 8 Nov 2014 20:56:35 +0100
From: Valentin Rothberg <valentinrothberg@...il.com>
To: linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org
Cc: pebolle@...cali.nl, stefan.hengelein@....de,
Valentin Rothberg <valentinrothberg@...il.com>
Subject: [PATCH] checkkconfigsymbols.py: improve detection of defects
This patch improves the detection of defects by updating the
regular expression to find Kconfig identifiers in the source
code, and fixes some cases of false positives. The following
changes are made:
- improve regex to find Kconfig identifiers in the source
- exclude .log files from analysis
- improve filtering of false positives (e.g, CONFIG_XXX)
- change output format from (feature:\tlist) to (feature\tlist)
Signed-off-by: Valentin Rothberg <valentinrothberg@...il.com>
---
Changelog:
This patch bases on version 6 (https://lkml.org/lkml/2014/9/27/93)
of a patch which has been picked up by Greg in his misc-char tree
in the char-misc-next branch. Version 6 replaces the old shell
script with a new implementation in python.
---
scripts/checkkconfigsymbols.py | 57 ++++++++++++++++++++----------------------
1 file changed, 27 insertions(+), 30 deletions(-)
diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
index f944089..e9cc689 100644
--- a/scripts/checkkconfigsymbols.py
+++ b/scripts/checkkconfigsymbols.py
@@ -1,36 +1,31 @@
#!/usr/bin/env python
-"""Find Kconfig identifieres that are referenced but not defined."""
+"""Find Kconfig identifiers that are referenced but not defined."""
-# Copyright (C) 2014 Valentin Rothberg <valentinrothberg@...il.com>
-# Copyright (C) 2014 Stefan Hengelein <stefan.hengelein@....de>
+# (c) 2014 Valentin Rothberg <valentinrothberg@...il.com>
+# (c) 2014 Stefan Hengelein <stefan.hengelein@....de>
#
-# This program is free software; you can redistribute it and/or modify it
-# under the terms and conditions of the GNU General Public License,
-# version 2, as published by the Free Software Foundation.
-#
-# This program is distributed in the hope it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-# more details.
+# Licensed under the terms of the GNU GPL License version 2
import os
import re
from subprocess import Popen, PIPE, STDOUT
-# REGEX EXPRESSIONS
+
+# regex expressions
OPERATORS = r"&|\(|\)|\||\!"
-FEATURE = r"\w*[A-Z]{1}\w*"
-CONFIG_DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
+FEATURE = r"(?:\w*[A-Z0-9]\w*){2,}"
+DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
EXPR = r"(?:" + OPERATORS + r"|\s|" + FEATURE + r")+"
STMT = r"^\s*(?:if|select|depends\s+on)\s+" + EXPR
+SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
-# REGEX OBJECTS
+# regex objects
REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
REGEX_FEATURE = re.compile(r"(" + FEATURE + r")")
-REGEX_SOURCE_FEATURE = re.compile(r"(?:D|\W|\b)+CONFIG_(" + FEATURE + r")")
-REGEX_KCONFIG_DEF = re.compile(CONFIG_DEF)
+REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
+REGEX_KCONFIG_DEF = re.compile(DEF)
REGEX_KCONFIG_EXPR = re.compile(EXPR)
REGEX_KCONFIG_STMT = re.compile(STMT)
REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
@@ -42,7 +37,7 @@ def main():
source_files = []
kconfig_files = []
defined_features = set()
- referenced_features = dict()
+ referenced_features = dict() # {feature: [files]}
# use 'git ls-files' to get the worklist
pop = Popen("git ls-files", stdout=PIPE, stderr=STDOUT, shell=True)
@@ -52,12 +47,12 @@ def main():
for gitfile in stdout.rsplit("\n"):
if ".git" in gitfile or "ChangeLog" in gitfile or \
- os.path.isdir(gitfile):
+ ".log" in gitfile or os.path.isdir(gitfile):
continue
if REGEX_FILE_KCONFIG.match(gitfile):
kconfig_files.append(gitfile)
else:
- # All non-Kconfig files are checked for consistency
+ # all non-Kconfig files are checked for consistency
source_files.append(gitfile)
for sfile in source_files:
@@ -68,15 +63,17 @@ def main():
print "Undefined symbol used\tFile list"
for feature in sorted(referenced_features):
+ # filter some false positives
+ if feature == "FOO" or feature == "BAR" or \
+ feature == "FOO_BAR" or feature == "XXX":
+ continue
if feature not in defined_features:
if feature.endswith("_MODULE"):
- # Avoid false positives for kernel modules
+ # avoid false positives for kernel modules
if feature[:-len("_MODULE")] in defined_features:
continue
- if "FOO" in feature or "BAR" in feature:
- continue
files = referenced_features.get(feature)
- print "%s:\t%s" % (feature, ", ".join(files))
+ print "%s\t%s" % (feature, ", ".join(files))
def parse_source_file(sfile, referenced_features):
@@ -92,9 +89,9 @@ def parse_source_file(sfile, referenced_features):
for feature in features:
if not REGEX_FILTER_FEATURES.search(feature):
continue
- paths = referenced_features.get(feature, set())
- paths.add(sfile)
- referenced_features[feature] = paths
+ sfiles = referenced_features.get(feature, set())
+ sfiles.add(sfile)
+ referenced_features[feature] = sfiles
def get_features_in_line(line):
@@ -113,7 +110,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
for i in range(len(lines)):
line = lines[i]
line = line.strip('\n')
- line = line.split("#")[0] # Ignore Kconfig comments
+ line = line.split("#")[0] # ignore comments
if REGEX_KCONFIG_DEF.match(line):
feature_def = REGEX_KCONFIG_DEF.findall(line)
@@ -122,11 +119,11 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
elif REGEX_KCONFIG_HELP.match(line):
skip = True
elif skip:
- # Ignore content of help messages
+ # ignore content of help messages
pass
elif REGEX_KCONFIG_STMT.match(line):
features = get_features_in_line(line)
- # Multi-line statements
+ # multi-line statements
while line.endswith("\\"):
i += 1
line = lines[i]
--
2.1.0
--
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