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"""
This plugin is used to trace memory leaks within the bcfg2-server
process using Guppy. By default the remote debugger is started
when this plugin is enabled. The debugger can be shutoff in a running
process using "bcfg2-admin xcmd Guppy.Disable" and reenabled using
"bcfg2-admin xcmd Guppy.Enable".
To attach the console run:
python -c "from guppy import hpy;hpy().monitor()"
For example:
# python -c "from guppy import hpy;hpy().monitor()"
<Monitor>
*** Connection 1 opened ***
<Monitor> lc
CID PID ARGV
1 25063 ['/usr/sbin/bcfg2-server', '-D', '/var/run/bcfg2-server.pid']
<Monitor> sc 1
Remote connection 1. To return to Monitor, type <Ctrl-C> or .<RETURN>
<Annex> int
Remote interactive console. To return to Annex, type '-'.
>>> hp.heap()
...
"""
import Bcfg2.Server.Plugin
from guppy.heapy import Remote
class Guppy(Bcfg2.Server.Plugin.Plugin):
"""Guppy is a debugging plugin to help trace memory leaks"""
__author__ = 'bcfg-dev@mcs.anl.gov'
__rmi__ = Bcfg2.Server.Plugin.Plugin.__rmi__ + ['Enable', 'Disable']
__child_rmi__ = __rmi__[:]
def __init__(self, core, datastore):
Bcfg2.Server.Plugin.Plugin.__init__(self, core, datastore)
self.Enable()
def Enable(self):
"""Enable remote debugging"""
try:
Remote.on()
except:
self.logger.error("Failed to create Heapy context")
raise Bcfg2.Server.Plugin.PluginInitError
def Disable(self):
"""Disable remote debugging"""
try:
Remote.off()
except:
self.logger.error("Failed to disable Heapy")
raise Bcfg2.Server.Plugin.PluginInitError
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