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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2012 OpenStack, LLC.
# Administrator of the National Aeronautics and Space Administration.
# All Rights Reserved.
#
# 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 gc
import pprint
import sys
import traceback
import eventlet
import eventlet.backdoor
import greenlet
from nova import flags
from nova.openstack.common import cfg
eventlet_backdoor_opts = [
cfg.IntOpt('backdoor_port',
default=None,
help='port for eventlet backdoor to listen')
]
FLAGS = flags.FLAGS
FLAGS.register_opts(eventlet_backdoor_opts)
def dont_use_this():
print "Don't use this, just disconnect instead"
def find_objects(t):
return filter(lambda o: isinstance(o, t), gc.get_objects())
def print_greenthreads():
for i, gt in enumerate(find_objects(greenlet.greenlet)):
print i, gt
traceback.print_stack(gt.gr_frame)
print
backdoor_locals = {
'exit': dont_use_this, # So we don't exit the entire process
'quit': dont_use_this, # So we don't exit the entire process
'fo': find_objects,
'pgt': print_greenthreads,
}
def initialize_if_enabled():
if FLAGS.backdoor_port is None:
return
# NOTE(johannes): The standard sys.displayhook will print the value of
# the last expression and set it to __builtin__._, which overwrites
# the __builtin__._ that gettext sets. Let's switch to using pprint
# since it won't interact poorly with gettext, and it's easier to
# read the output too.
def displayhook(val):
if val is not None:
pprint.pprint(val)
sys.displayhook = displayhook
eventlet.spawn(eventlet.backdoor.backdoor_server,
eventlet.listen(('localhost', FLAGS.backdoor_port)),
locals=backdoor_locals)
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