/usr/lib/python3/dist-packages/diffoscope/comparators/macho.py is in diffoscope 93ubuntu1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2014-2015 Jérémy Bobbio <lunar@debian.org>
# Copyright © 2015 Clemens Lang <cal@macports.org>
#
# diffoscope is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# diffoscope 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with diffoscope. If not, see <https://www.gnu.org/licenses/>.
import re
import subprocess
from diffoscope.tools import tool_required
from diffoscope.difference import Difference
from .utils.file import File
from .utils.command import Command
class Otool(Command):
def __init__(self, path, arch, *args, **kwargs):
self._path = path
self._arch = arch
super().__init__(path, *args, **kwargs)
@tool_required('otool')
def cmdline(self):
return ['otool'] + self.otool_options() + [self.path]
def otool_options(self):
return ['-arch', self._arch]
def filter(self, line):
# Strip filename
prefix = '{}:'.format(self._path)
if line.decode('utf-8', 'ignore').index(prefix) == 0:
return line[len(prefix):].strip()
return line
class OtoolHeaders(Otool):
def otool_options(self):
return super().otool_options() + ['-h']
class OtoolLibraries(Otool):
def otool_options(self):
return super().otool_options() + ['-L']
class OtoolDisassemble(Otool):
def otool_options(self):
return super().otool_options() + ['-tdvV']
class OtoolDisassembleInternal(Otool):
def otool_options(self):
return super().otool_options() + ['-tdvVQ']
class MachoFile(File):
DESCRIPTION = "MacOS binaries"
FILE_TYPE_RE = re.compile(r'^Mach-O ')
RE_EXTRACT_ARCHS = re.compile(r'^(?:Architectures in the fat file: .* are|Non-fat file: .* is architecture): (.*)$')
@staticmethod
@tool_required('lipo')
def get_arch_from_macho(path):
lipo_output = subprocess.check_output(['lipo', '-info', path]).decode('utf-8')
lipo_match = MachoFile.RE_EXTRACT_ARCHS.match(lipo_output)
if lipo_match is None:
raise ValueError('lipo -info on Mach-O file %s did not produce expected output. Output was: %s' % path, lipo_output)
return lipo_match.group(1).split()
def compare_details(self, other, source=None):
differences = []
# Check for fat binaries, trigger a difference if the architectures differ
my_archs = MachoFile.get_arch_from_macho(self.path)
other_archs = MachoFile.get_arch_from_macho(other.path)
differences.append(Difference.from_text('\n'.join(my_archs),
'\n'.join(other_archs),
self.name, other.name, source='architectures'))
# Compare common architectures for differences
for common_arch in set(my_archs) & set(other_archs):
differences.append(Difference.from_command(OtoolHeaders, self.path, other.path, command_args=[common_arch],
comment="Mach-O headers for architecture %s" % common_arch))
differences.append(Difference.from_command(OtoolLibraries, self.path, other.path, command_args=[common_arch],
comment="Mach-O load commands for architecture %s" % common_arch))
x = Difference.from_command(
OtoolDisassemble,
self.path,
other.path,
command_args=[common_arch],
comment="Code for architecture %s" % common_arch,
)
differences.append(x)
# If the LLVM disassembler does not work, try the internal one.
if x is None:
differences.append(Difference.from_command(
OtoolDisassembleInternal,
self.path,
other.path,
command_args=[common_arch],
comment="Code for architecture %s (internal disassembler)" % common_arch,
))
return differences
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