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https://github.com/edk2-porting/linux-next.git
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cc641d5529
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@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
140 lines
4.6 KiB
Python
140 lines
4.6 KiB
Python
#!/usr/bin/env python
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"""Find Kconfig identifiers that are referenced but not defined."""
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# (c) 2014 Valentin Rothberg <valentinrothberg@gmail.com>
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# (c) 2014 Stefan Hengelein <stefan.hengelein@fau.de>
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#
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# Licensed under the terms of the GNU GPL License version 2
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import os
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import re
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from subprocess import Popen, PIPE, STDOUT
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# regex expressions
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OPERATORS = r"&|\(|\)|\||\!"
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FEATURE = r"(?:\w*[A-Z0-9]\w*){2,}"
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DEF = r"^\s*(?:menu){,1}config\s+(" + FEATURE + r")\s*"
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EXPR = r"(?:" + OPERATORS + r"|\s|" + FEATURE + r")+"
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STMT = r"^\s*(?:if|select|depends\s+on)\s+" + EXPR
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SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
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# regex objects
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REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
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REGEX_FEATURE = re.compile(r"(" + FEATURE + r")")
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REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
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REGEX_KCONFIG_DEF = re.compile(DEF)
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REGEX_KCONFIG_EXPR = re.compile(EXPR)
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REGEX_KCONFIG_STMT = re.compile(STMT)
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REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
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REGEX_FILTER_FEATURES = re.compile(r"[A-Za-z0-9]$")
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def main():
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"""Main function of this module."""
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source_files = []
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kconfig_files = []
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defined_features = set()
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referenced_features = dict() # {feature: [files]}
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# use 'git ls-files' to get the worklist
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pop = Popen("git ls-files", stdout=PIPE, stderr=STDOUT, shell=True)
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(stdout, _) = pop.communicate() # wait until finished
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if len(stdout) > 0 and stdout[-1] == "\n":
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stdout = stdout[:-1]
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for gitfile in stdout.rsplit("\n"):
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if ".git" in gitfile or "ChangeLog" in gitfile or \
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".log" in gitfile or os.path.isdir(gitfile):
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continue
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if REGEX_FILE_KCONFIG.match(gitfile):
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kconfig_files.append(gitfile)
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else:
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# all non-Kconfig files are checked for consistency
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source_files.append(gitfile)
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for sfile in source_files:
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parse_source_file(sfile, referenced_features)
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for kfile in kconfig_files:
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parse_kconfig_file(kfile, defined_features, referenced_features)
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print "Undefined symbol used\tFile list"
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for feature in sorted(referenced_features):
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# filter some false positives
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if feature == "FOO" or feature == "BAR" or \
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feature == "FOO_BAR" or feature == "XXX":
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continue
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if feature not in defined_features:
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if feature.endswith("_MODULE"):
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# avoid false positives for kernel modules
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if feature[:-len("_MODULE")] in defined_features:
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continue
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files = referenced_features.get(feature)
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print "%s\t%s" % (feature, ", ".join(files))
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def parse_source_file(sfile, referenced_features):
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"""Parse @sfile for referenced Kconfig features."""
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lines = []
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with open(sfile, "r") as stream:
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lines = stream.readlines()
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for line in lines:
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if not "CONFIG_" in line:
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continue
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features = REGEX_SOURCE_FEATURE.findall(line)
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for feature in features:
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if not REGEX_FILTER_FEATURES.search(feature):
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continue
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sfiles = referenced_features.get(feature, set())
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sfiles.add(sfile)
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referenced_features[feature] = sfiles
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def get_features_in_line(line):
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"""Return mentioned Kconfig features in @line."""
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return REGEX_FEATURE.findall(line)
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def parse_kconfig_file(kfile, defined_features, referenced_features):
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"""Parse @kfile and update feature definitions and references."""
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lines = []
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skip = False
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with open(kfile, "r") as stream:
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lines = stream.readlines()
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for i in range(len(lines)):
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line = lines[i]
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line = line.strip('\n')
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line = line.split("#")[0] # ignore comments
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if REGEX_KCONFIG_DEF.match(line):
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feature_def = REGEX_KCONFIG_DEF.findall(line)
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defined_features.add(feature_def[0])
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skip = False
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elif REGEX_KCONFIG_HELP.match(line):
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skip = True
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elif skip:
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# ignore content of help messages
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pass
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elif REGEX_KCONFIG_STMT.match(line):
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features = get_features_in_line(line)
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# multi-line statements
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while line.endswith("\\"):
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i += 1
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line = lines[i]
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line = line.strip('\n')
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features.extend(get_features_in_line(line))
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for feature in set(features):
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paths = referenced_features.get(feature, set())
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paths.add(kfile)
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referenced_features[feature] = paths
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if __name__ == "__main__":
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main()
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