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#!/usr/bin/env python3
# Copyright 2015-2021 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# SPDX-License-Identifier: GPL-3.0-or-later
# This file is part of qutebrowser.
#
# qutebrowser 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.
#
# qutebrowser 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 qutebrowser. If not, see <https://www.gnu.org/licenses/>.
"""Get qutebrowser crash information and stacktraces from coredumpctl."""
import os
import os.path
import sys
import argparse
import subprocess
import tempfile
import dataclasses
sys.path.insert(0, os.path.join(os.path.dirname(__file__), os.pardir,
os.pardir))
from scripts import utils
@dataclasses.dataclass
class Line:
"""A line in "coredumpctl list"."""
time: str
pid: int
uid: int
gid: int
sig: int
present: bool
exe: str
def _convert_present(data):
"""Convert " "/"*" to True/False for parse_coredumpctl_line."""
if data == '*':
return True
elif data == ' ':
return False
else:
raise ValueError(data)
def parse_coredumpctl_line(line):
"""Parse a given string coming from coredumpctl and return a Line object.
Example input:
Mon 2015-09-28 23:22:24 CEST 10606 1000 1000 11 /usr/bin/python3.4
"""
fields = {
'time': (0, 28, str),
'pid': (29, 35, int),
'uid': (36, 41, int),
'gid': (42, 47, int),
'sig': (48, 51, int),
'present': (52, 53, _convert_present),
'exe': (54, None, str),
}
data = {}
for name, (start, end, converter) in fields.items():
data[name] = converter(line[start:end])
return Line(**data)
def get_info(pid):
"""Get and parse "coredumpctl info" output for the given PID."""
data = {}
output = subprocess.run(['coredumpctl', 'info', str(pid)], check=True,
stdout=subprocess.PIPE).stdout
output = output.decode('utf-8')
for line in output.split('\n'):
if not line.strip():
continue
try:
key, value = line.split(':', maxsplit=1)
except ValueError:
# systemd stack output
continue
data[key.strip()] = value.strip()
return data
def is_qutebrowser_dump(parsed):
"""Check if the given Line is a qutebrowser dump."""
basename = os.path.basename(parsed.exe)
if basename == 'python' or basename.startswith('python3'):
info = get_info(parsed.pid)
try:
cmdline = info['Command Line']
except KeyError:
return True
else:
return '-m qutebrowser' in cmdline
else:
return basename == 'qutebrowser'
def dump_infos_gdb(parsed):
"""Dump all needed infos for the given crash using gdb."""
with tempfile.TemporaryDirectory() as tempdir:
coredump = os.path.join(tempdir, 'dump')
subprocess.run(['coredumpctl', 'dump', '-o', coredump,
str(parsed.pid)], check=True)
subprocess.run(['gdb', parsed.exe, coredump,
'-ex', 'info threads',
'-ex', 'thread apply all bt full',
'-ex', 'quit'], check=True)
def dump_infos(parsed):
"""Dump all possible infos for the given crash."""
if not parsed.present:
info = get_info(parsed.pid)
print("{}: Signal {} with no coredump: {}".format(
parsed.time, info.get('Signal', None),
info.get('Command Line', None)))
else:
print('\n\n\n')
utils.print_title('{} - {}'.format(parsed.time, parsed.pid))
sys.stdout.flush()
dump_infos_gdb(parsed)
def check_prerequisites():
"""Check if coredumpctl/gdb are installed."""
for binary in ['coredumpctl', 'gdb']:
try:
subprocess.run([binary, '--version'], check=True)
except FileNotFoundError:
print("{} is needed to run this script!".format(binary),
file=sys.stderr)
sys.exit(1)
def main():
check_prerequisites()
parser = argparse.ArgumentParser()
parser.add_argument('--all', help="Also list crashes without coredumps.",
action='store_true')
args = parser.parse_args()
coredumps = subprocess.run(['coredumpctl', 'list'], check=True,
stdout=subprocess.PIPE).stdout
lines = coredumps.decode('utf-8').split('\n')
for line in lines[1:]:
if not line.strip():
continue
parsed = parse_coredumpctl_line(line)
if not parsed.present and not args.all:
continue
if is_qutebrowser_dump(parsed):
dump_infos(parsed)
if __name__ == '__main__':
main()
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