diff options
Diffstat (limited to 'debug_info_test/check_exist.py')
-rw-r--r-- | debug_info_test/check_exist.py | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/debug_info_test/check_exist.py b/debug_info_test/check_exist.py new file mode 100644 index 00000000..5e7cce19 --- /dev/null +++ b/debug_info_test/check_exist.py @@ -0,0 +1,90 @@ +# 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. + +import os +import subprocess + +from whitelist import is_whitelisted + +def check_debug_info(dso_path, readelf_content): + """check whether debug info section exists in the elf file. + + Args: + readelf: debug info dumped by command readelf + + Returns: + True if debug info section exists, otherwise False. + """ + + # Return True if it is whitelisted + if is_whitelisted('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: + readelf: 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 whitelisted + if is_whitelisted('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 + Return: + 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')) + 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 |