/usr/bin/ovs-parse-backtrace is in openvswitch-common 2.3.0+git20140819-3+deb8u1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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 | #! /usr/bin/python
#
# Copyright (c) 2012 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import optparse
import os
import re
import subprocess
import sys
addr2line_cache = {} # None if addr2line is missing or broken.
def addr2line(binary, addr):
global addr2line_cache
if addr2line_cache is None:
return ""
if addr in addr2line_cache:
return addr2line_cache[addr]
cmd = ["addr2line", "-f", "-s", "-e", binary, addr]
try:
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
lines = proc.stdout.readlines()
failed = proc.returncode
except OSError:
failed = True
if failed:
addr2line_cache = None
return ""
lines = [l.strip() for l in lines]
return " ".join(lines)
def main():
parser = optparse.OptionParser(version='2.3.0',
usage="usage: %prog [binary]",
description="""\
Parses the output of ovs-appctl backtrace producing a more human readable
result. Expected usage is for ovs-appctl backtrace to be piped in.""")
options, args = parser.parse_args()
if len(args) > 1:
parser.print_help()
sys.exit(1)
if len(args) == 1:
binary = args[0]
else:
binary = "/usr/sbin/ovs-vswitchd"
debug = "/usr/lib/debug%s.debug" % binary
if os.path.exists(debug):
binary = debug
print "Binary: %s\n" % binary
stdin = sys.stdin.read()
traces = []
for trace in stdin.strip().split("\n\n"):
lines = trace.splitlines()
match = re.search(r'Count (\d+)', lines[0])
if match:
count = int(match.group(1))
else:
count = 0
traces.append((lines[1:], count))
traces = sorted(traces, key=(lambda x: x[1]), reverse=True)
for lines, count in traces:
longest = max(len(l) for l in lines)
print "Backtrace Count: %d" % count
for line in lines:
match = re.search(r'\[(0x.*)]', line)
if match:
print "%s %s" % (line.ljust(longest),
addr2line(binary, match.group(1)))
else:
print line
print
if __name__ == "__main__":
main()
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