You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.5 KiB
103 lines
2.5 KiB
# -*- coding: utf-8 -*-
|
|
# Copyright 2018 The Chromium OS Authors. All rights reserved.
|
|
# Use of this source code is governed by a BSD-style license that can be
|
|
# found in the LICENSE file.
|
|
|
|
"""check whether intended components exists in the given dso."""
|
|
|
|
from __future__ import print_function
|
|
|
|
import os
|
|
import subprocess
|
|
|
|
from allowlist import is_allowlisted
|
|
|
|
|
|
def check_debug_info(dso_path, readelf_content):
|
|
"""Check whether debug info section exists in the elf file.
|
|
|
|
Args:
|
|
dso_path: path to the dso.
|
|
readelf_content: debug info dumped by command readelf.
|
|
|
|
Returns:
|
|
True if debug info section exists, otherwise False.
|
|
"""
|
|
|
|
# Return True if it is allowlisted
|
|
if is_allowlisted('exist_debug_info', dso_path):
|
|
return True
|
|
|
|
for l in readelf_content:
|
|
if 'debug_info' in l:
|
|
return True
|
|
return False
|
|
|
|
|
|
def check_producer(dso_path, readelf_content):
|
|
"""Check whether DW_AT_producer exists in each compile unit.
|
|
|
|
Args:
|
|
dso_path: path to the dso.
|
|
readelf_content: debug info dumped by command readelf.
|
|
|
|
Returns:
|
|
True if DW_AT_producer exists in each compile unit, otherwise False.
|
|
Notice: If no compile unit in DSO, also return True.
|
|
"""
|
|
|
|
# Return True if it is allowlisted
|
|
if is_allowlisted('exist_producer', dso_path):
|
|
return True
|
|
|
|
# Indicate if there is a producer under each cu
|
|
cur_producer = False
|
|
|
|
first_cu = True
|
|
producer_exist = True
|
|
|
|
for l in readelf_content:
|
|
if 'DW_TAG_compile_unit' in l:
|
|
if not first_cu and not cur_producer:
|
|
producer_exist = False
|
|
break
|
|
first_cu = False
|
|
cur_producer = False
|
|
elif 'DW_AT_producer' in l:
|
|
cur_producer = True
|
|
|
|
# Check whether last producer of compile unit exists in the elf,
|
|
# also return True if no cu in the DSO.
|
|
if not first_cu and not cur_producer:
|
|
producer_exist = False
|
|
|
|
return producer_exist
|
|
|
|
|
|
def check_exist_all(dso_path):
|
|
"""check whether intended components exists in the given dso.
|
|
|
|
Args:
|
|
dso_path: path to the dso.
|
|
|
|
Returns:
|
|
True if everything looks fine otherwise False.
|
|
"""
|
|
|
|
readelf = subprocess.Popen(
|
|
['readelf', '--debug-dump=info', '--dwarf-depth=1', dso_path],
|
|
stdout=subprocess.PIPE,
|
|
stderr=open(os.devnull, 'w'),
|
|
encoding='utf-8')
|
|
readelf_content = list(readelf.stdout)
|
|
|
|
exist_checks = [check_debug_info, check_producer]
|
|
|
|
for e in exist_checks:
|
|
if not e(dso_path, readelf_content):
|
|
check_failed = e.__module__ + ': ' + e.__name__
|
|
print('%s failed check: %s' % (dso_path, check_failed))
|
|
return False
|
|
|
|
return True
|