84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
#!/usr/bin/python3
|
|
# Processing of symbols and abilist files.
|
|
# Copyright (C) 2020-2022 Free Software Foundation, Inc.
|
|
# This file is part of the GNU C Library.
|
|
#
|
|
# The GNU C 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.
|
|
#
|
|
# The GNU C 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 the GNU C Library; if not, see
|
|
# <https://www.gnu.org/licenses/>.
|
|
|
|
"""Symbol processing for glibc."""
|
|
|
|
import os
|
|
|
|
def replace_file(path, new_contents):
|
|
"""Atomically replace PATH with lines from NEW_CONTENTS.
|
|
|
|
NEW_CONTENTS must be a sequence of strings.
|
|
|
|
"""
|
|
temppath = path + 'T'
|
|
with open(temppath, 'w') as out:
|
|
for line in new_contents:
|
|
out.write(line)
|
|
os.rename(temppath, path)
|
|
|
|
class VersionedSymbol:
|
|
"""A combination of a symbol and its version."""
|
|
|
|
def __init__(self, symbol, version):
|
|
"""Construct a new versioned symbol."""
|
|
assert symbol
|
|
assert version
|
|
self.symbol = symbol
|
|
self.version = version
|
|
|
|
def __str__(self):
|
|
return self.symbol + '@' + self.version
|
|
|
|
def __eq__(self, other):
|
|
return self.symbol == other.symbol and self.version == other.version
|
|
|
|
def __hash__(self):
|
|
return hash(self.symbol) ^ hash(self.version)
|
|
|
|
def read_abilist(path):
|
|
"""Read the abilist file at PATH.
|
|
|
|
Return a dictionary from VersionedSymbols to their flags (as
|
|
strings).
|
|
|
|
"""
|
|
result = {}
|
|
with open(path) as inp:
|
|
for line in inp:
|
|
version, symbol, flags = line.strip().split(' ', 2)
|
|
versym = VersionedSymbol(symbol, version)
|
|
if versym in result:
|
|
raise IOError("{}: duplicate symbol {}".format(path, versym))
|
|
result[versym] = flags
|
|
return result
|
|
|
|
def abilist_lines(symbols):
|
|
"""Build the abilist file contents (as a list of lines).
|
|
|
|
SYMBOLS is a dictionary from VersionedSymbols to their flags.
|
|
|
|
"""
|
|
result = []
|
|
for versym, flags in symbols.items():
|
|
result.append('{} {} {}\n'.format(
|
|
versym.version, versym.symbol, flags))
|
|
result.sort()
|
|
return result
|