Newer
Older
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
#!/usr/bin/env python3
# Copyright 2013-2019 Valve Corporation
# Copyright 2019 Collabora Ltd.
#
# SPDX-License-Identifier: MIT
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
import argparse
import logging
import os
import re
import subprocess
import sys
"""
Provide build-ID-based hard links to legacy path-based debugging symbols.
Based on build-runtime.py in steam-runtime.
"""
logger = logging.getLogger('flatdeb.dbgsym-use-build-id')
def main():
# type: (...) -> None
parser = argparse.ArgumentParser(
description=(
'Provide build-ID-based hard links for legacy debug symbols'
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
123
124
125
126
127
128
129
130
131
132
133
),
)
parser.add_argument(
'--dry-run',
action='store_true',
default=False,
)
parser.add_argument('--debug-dir', default='/usr/lib/debug')
args = parser.parse_args()
for dirname, subdirs, files in os.walk(args.debug_dir):
# Skip build-ID directory: it is already in the form we wanted
if '.build-id' in subdirs:
subdirs.remove('.build-id')
for f in files:
# Scrape the output of readelf to find the build-ID for this
# binary
path = os.path.join(dirname, f)
with subprocess.Popen([
os.environ.get('READELF', 'readelf'), '-n', path,
], stdout=subprocess.PIPE, universal_newlines=True) as p:
for line in p.stdout:
m = re.search(
r'Build ID: ([a-fA-F0-9]{2})([a-fA-F0-9]+)',
line,
re.ASCII,
)
if m is None:
continue
# ensure no path traversal
assert '.' not in m.group(1)
assert '.' not in m.group(2)
linkdir = os.path.join(
args.debug_dir, '.build-id', m.group(1),
)
link = os.path.join(linkdir, m.group(2) + '.debug')
if args.dry_run:
logger.info('Would hard-link %s as %s', path, link)
else:
logger.info('Hard-linking %s as %s', path, link)
if not os.access(linkdir, os.W_OK):
os.makedirs(linkdir)
if os.path.lexists(link):
os.unlink(link)
os.link(os.path.join(dirname, f), link)
break
else:
logger.warning(
'Unable to create build-ID-based hard link to %s',
path,
)
if __name__ == '__main__':
if sys.stderr.isatty():
try:
import colorlog
except ImportError:
pass
else:
formatter = colorlog.ColoredFormatter(
'%(log_color)s%(levelname)s:%(name)s:%(reset)s %(message)s')
handler = logging.StreamHandler()
handler.setFormatter(formatter)
logging.getLogger().addHandler(handler)
else:
logging.basicConfig()
logging.getLogger().setLevel(logging.DEBUG)
try:
main()
except KeyboardInterrupt:
raise SystemExit(130)