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checkkconfigsymbols.py: multiprocessing of files 

Distribute the parsing of source and Kconfig files on all available
cores to speed up processing.

Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Valentin Rothberg 2015-10-15 10:37:47 +02:00 committed by Greg Kroah-Hartman
parent 9f9499ae8e
commit e2042a8a80
1 changed files with 102 additions and 26 deletions
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128
scripts/checkkconfigsymbols.py
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@ -10,9 +10,11 @@
import os
import re
import signal
import sys
from subprocess import Popen, PIPE, STDOUT
from multiprocessing import Pool, cpu_count
from optparse import OptionParser
from subprocess import Popen, PIPE, STDOUT
# regex expressions
@ -26,7 +28,7 @@ SOURCE_FEATURE = r"(?:\W|\b)+[D]{,1}CONFIG_(" + FEATURE + r")"
# regex objects
REGEX_FILE_KCONFIG = re.compile(r".*Kconfig[\.\w+\-]*$")
REGEX_FEATURE = re.compile(r'(?!\B"[^"]*)' + FEATURE + r'(?![^"]*"\B)')
REGEX_FEATURE = re.compile(r'(?!\B)' + FEATURE + r'(?!\B)')
REGEX_SOURCE_FEATURE = re.compile(SOURCE_FEATURE)
REGEX_KCONFIG_DEF = re.compile(DEF)
REGEX_KCONFIG_EXPR = re.compile(EXPR)
@ -34,6 +36,7 @@ REGEX_KCONFIG_STMT = re.compile(STMT)
REGEX_KCONFIG_HELP = re.compile(r"^\s+(help|---help---)\s*$")
REGEX_FILTER_FEATURES = re.compile(r"[A-Za-z0-9]$")
REGEX_NUMERIC = re.compile(r"0[xX][0-9a-fA-F]+|[0-9]+")
REGEX_QUOTES = re.compile("(\"(.*?)\")")
def parse_options():
@ -209,14 +212,36 @@ def get_head():
return stdout.strip('\n')
def partition(lst, size):
"""Partition list @lst into eveni-sized lists of size @size."""
return [lst[i::size] for i in xrange(size)]
def init_worker():
"""Set signal handler to ignore SIGINT."""
signal.signal(signal.SIGINT, signal.SIG_IGN)
def check_symbols(ignore):
"""Find undefined Kconfig symbols and return a dict with the symbol as key
and a list of referencing files as value. Files matching %ignore are not
checked for undefined symbols."""
pool = Pool(cpu_count(), init_worker)
try:
return check_symbols_helper(pool, ignore)
except KeyboardInterrupt:
pool.terminate()
pool.join()
sys.exit(1)
def check_symbols_helper(pool, ignore):
"""Helper method for check_symbols(). Used to catch keyboard interrupts in
check_symbols() in order to properly terminate running worker processes."""
source_files = []
kconfig_files = []
defined_features = set()
referenced_features = dict() # {feature: [files]}
defined_features = []
referenced_features = dict() # {file: [features]}
# use 'git ls-files' to get the worklist
stdout = execute("git ls-files")
@ -231,21 +256,33 @@ def check_symbols(ignore):
if REGEX_FILE_KCONFIG.match(gitfile):
kconfig_files.append(gitfile)
else:
# all non-Kconfig files are checked for consistency
if ignore and not re.match(ignore, gitfile):
continue
# add source files that do not match the ignore pattern
source_files.append(gitfile)
for sfile in source_files:
if ignore and re.match(ignore, sfile):
# do not check files matching %ignore
continue
parse_source_file(sfile, referenced_features)
# parse source files
arglist = partition(source_files, cpu_count())
for res in pool.map(parse_source_files, arglist):
referenced_features.update(res)
for kfile in kconfig_files:
if ignore and re.match(ignore, kfile):
# do not collect references for files matching %ignore
parse_kconfig_file(kfile, defined_features, dict())
else:
parse_kconfig_file(kfile, defined_features, referenced_features)
# parse kconfig files
arglist = []
for part in partition(kconfig_files, cpu_count()):
arglist.append((part, ignore))
for res in pool.map(parse_kconfig_files, arglist):
defined_features.extend(res[0])
referenced_features.update(res[1])
defined_features = set(defined_features)
# inverse mapping of referenced_features to dict(feature: [files])
inv_map = dict()
for _file, features in referenced_features.iteritems():
for feature in features:
inv_map[feature] = inv_map.get(feature, set())
inv_map[feature].add(_file)
referenced_features = inv_map
undefined = {} # {feature: [files]}
for feature in sorted(referenced_features):
@ -262,9 +299,23 @@ def check_symbols(ignore):
return undefined
def parse_source_file(sfile, referenced_features):
"""Parse @sfile for referenced Kconfig features."""
def parse_source_files(source_files):
"""Parse each source file in @source_files and return dictionary with source
files as keys and lists of references Kconfig symbols as values."""
referenced_features = dict()
for sfile in source_files:
referenced_features[sfile] = parse_source_file(sfile)
return referenced_features
def parse_source_file(sfile):
"""Parse @sfile and return a list of referenced Kconfig features."""
lines = []
references = []
if not os.path.exists(sfile):
return references
with open(sfile, "r") as stream:
lines = stream.readlines()
@ -275,9 +326,9 @@ def parse_source_file(sfile, referenced_features):
for feature in features:
if not REGEX_FILTER_FEATURES.search(feature):
continue
sfiles = referenced_features.get(feature, set())
sfiles.add(sfile)
referenced_features[feature] = sfiles
references.append(feature)
return references
def get_features_in_line(line):
@ -285,11 +336,35 @@ def get_features_in_line(line):
return REGEX_FEATURE.findall(line)
def parse_kconfig_file(kfile, defined_features, referenced_features):
def parse_kconfig_files(args):
"""Parse kconfig files and return tuple of defined and references Kconfig
symbols. Note, @args is a tuple of a list of files and the @ignore
pattern."""
kconfig_files = args[0]
ignore = args[1]
defined_features = []
referenced_features = dict()
for kfile in kconfig_files:
defined, references = parse_kconfig_file(kfile)
defined_features.extend(defined)
if ignore and re.match(ignore, kfile):
# do not collect references for files that match the ignore pattern
continue
referenced_features[kfile] = references
return (defined_features, referenced_features)
def parse_kconfig_file(kfile):
"""Parse @kfile and update feature definitions and references."""
lines = []
defined = []
references = []
skip = False
if not os.path.exists(kfile):
return defined, references
with open(kfile, "r") as stream:
lines = stream.readlines()
@ -300,7 +375,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
if REGEX_KCONFIG_DEF.match(line):
feature_def = REGEX_KCONFIG_DEF.findall(line)
defined_features.add(feature_def[0])
defined.append(feature_def[0])
skip = False
elif REGEX_KCONFIG_HELP.match(line):
skip = True
@ -308,6 +383,7 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
# ignore content of help messages
pass
elif REGEX_KCONFIG_STMT.match(line):
line = REGEX_QUOTES.sub("", line)
features = get_features_in_line(line)
# multi-line statements
while line.endswith("\\"):
@ -319,9 +395,9 @@ def parse_kconfig_file(kfile, defined_features, referenced_features):
if REGEX_NUMERIC.match(feature):
# ignore numeric values
continue
paths = referenced_features.get(feature, set())
paths.add(kfile)
referenced_features[feature] = paths
references.append(feature)
return defined, references
if __name__ == "__main__":