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# Copyright (C) 2018 Red Hat Inc.
#
# Authors: Sergio Lopez Pascual <slopezpa@redhat.com>
# Brad Hubbard <bhubbard@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program 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 Library Public License for more details.
#
# By default ceph daemons and clients maintain a list of log_max_recent (default
# 10000) log entries at a high debug level. This script will attempt to dump out
# that log from a ceph::log::Log* passed to the ceph-dump-log function or, if no
# object is passed, default to the globally available 'g_ceph_context->_log'
# (thanks Kefu). This pointer may be obtained via the _log member of a
# CephContext object (i.e. *cct->_log) from any thread that contains such a
# CephContext. Normally, you will find a thread waiting in
# ceph::logging::Log::entry and the 'this' pointer from such a frame can also be
# passed to ceph-dump-log.
import gdb
from datetime import datetime
try:
# Python 2 forward compatibility
range = xrange
except NameError:
pass
class CephDumpLog(gdb.Command):
def __init__(self):
super(CephDumpLog, self).__init__(
'ceph-dump-log',
gdb.COMMAND_DATA, gdb.COMPLETE_SYMBOL, False)
def invoke(self, args, from_tty):
arg_list = gdb.string_to_argv(args)
if len(arg_list) < 1:
log = gdb.parse_and_eval('g_ceph_context->_log')
else:
log = gdb.parse_and_eval(arg_list[0])
luminous_mimic = None
try:
entry = log['m_recent']['m_head']
size = log['m_recent']['m_len']
luminous_mimic = True
except gdb.error:
entry = log['m_recent']['m_first']
size = log['m_recent']['m_size']
end = log['m_recent']['m_end']
buff = log['m_recent']['m_buff']
for i in range(size):
if luminous_mimic:
try: # early luminous
stamp = int(str(entry['m_stamp']['tv']['tv_sec']) + str(entry['m_stamp']['tv']['tv_nsec']))
logline = entry['m_streambuf']['m_buf']
strlen = int(entry['m_streambuf']['m_buf_len'])
except gdb.error: # mimic
stamp = entry['m_stamp']['__d']['__r']['count']
pptr = entry['m_data']['m_pptr']
logline = entry['m_data']['m_buf']
strlen = int(pptr - logline)
else:
stamp = entry['m_stamp']['__d']['__r']['count']
logline = entry['str']['m_holder']['m_start']
strlen = int(entry['str']['m_holder']['m_size'])
thread = entry['m_thread']
prio = entry['m_prio']
subsys = entry['m_subsys']
dt = datetime.fromtimestamp(int(stamp) / 1e9) # Giving up some precision
gdb.write(dt.strftime('%Y-%m-%d %H:%M:%S.%f '))
gdb.write("thread: {0:#x} priority: {1} subsystem: {2} ".
format(int(thread), prio, subsys))
gdb.write(logline.string("ascii", errors='ignore')[0:strlen])
gdb.write("\n")
if luminous_mimic:
entry = entry['m_next'].dereference()
else:
entry = entry + 1
if entry >= end:
entry = buff
CephDumpLog()
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