libvirt/scripts/check-symfile.py

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#!/usr/bin/env python3
#
# Copyright (C) 2012-2019 Red Hat, Inc.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see
# <http://www.gnu.org/licenses/>.
import re
import subprocess
import sys
if len(sys.argv) < 3:
print("syntax: %s SYMFILE ELFLIB(S)" % sys.argv[0], file=sys.stderr)
symfile = sys.argv[1]
elflibs = sys.argv[2:]
wantsyms = {}
gotsyms = {}
ret = 0
with open(symfile, "r") as fh:
for line in fh:
line = line.strip()
if "{" in line:
continue
if "}" in line:
continue
if line in ["global:", "local:"]:
continue
if line == "":
continue
if line[0] == '#':
continue
if "*" in line:
continue
line = line.strip(";")
if line in wantsyms:
print("Symbol %s is listed twice" % line, file=sys.stderr)
ret = 1
else:
wantsyms[line] = True
for elflib in elflibs:
nm = subprocess.Popen(["nm", elflib], shell=False,
stdout=subprocess.PIPE).stdout
for line in nm:
line = line.decode("utf-8")
symmatch = re.search(r'''^\S+\s(?:[TBD])\s(\S+)\s*$''', line)
if symmatch is None:
continue
gotsyms[symmatch.group(1)] = True
for sym in wantsyms.keys():
if sym in gotsyms:
continue
print("Expected symbol '%s' is not in ELF library" % sym, file=sys.stderr)
ret = 1
sys.exit(ret)