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#! /usr/bin/env python
# -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
# vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
#
# Copyright (C) 2010 Patrick Crews
#
# This program 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 2 of the License, 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""system_management.py
code for dealing with system-level 'stuff'.
This includes setting environment variables, looking for clients,
so on and so forth.
These things are / should be constant regardless of the testing being done
We do an initial preflight / setup, we then call the mode-specific
system_initialise() to do whatever the testing mode requires to do that
voodoo that it do so well
"""
# imports
import os
import sys
import copy
from uuid import uuid4
import shutil
import getpass
import commands
from lib.sys_mgmt.port_management import portManager
from lib.sys_mgmt.logging_management import loggingManager
from lib.sys_mgmt.time_management import timeManager
class systemManager:
"""Class to deal with the basics of system-level interaction
and awareness
Uses other managers to handle sub-tasks like port management
"""
def __init__(self, variables, tree_type='drizzle'):
self.logging = loggingManager(variables)
if variables['verbose']:
self.logging.verbose("Initializing system manager...")
self.skip_keys = [ 'code_tree'
, 'ld_lib_paths'
, 'port_manager'
, 'logging_manager'
, 'environment_reqs'
, 'env_var_delimiter']
self.debug = variables['debug']
self.verbose = variables['verbose']
self.env_var_delimiter = ':'
self.no_shm = variables['noshm']
self.shm_path = self.find_path(["/dev/shm", "/tmp"], required=0)
self.cur_os = os.uname()[0]
self.cur_user = getpass.getuser()
self.workdir = os.path.abspath(variables['workdir'])
self.datadir = os.path.abspath(os.path.join(variables['testdir'],'dbqp_data'))
self.top_srcdir = os.path.abspath(variables['topsrcdir'])
self.top_builddir = os.path.abspath(variables['topbuilddir'])
self.start_dirty = variables['startdirty']
self.valgrind = variables['valgrind']
self.gdb = variables['gdb']
# we use this to preface commands in order to run valgrind and such
self.cmd_prefix = ''
self.port_manager = portManager(self,variables['debug'])
self.time_manager = timeManager(self)
# Make sure the tree we are testing looks good
self.code_tree = self.get_code_tree(variables, tree_type)
self.ld_lib_paths = self.join_env_var_values(self.code_tree.ld_lib_paths)
# Some ENV vars are system-standard
# We describe and set them here and now
# The format is name: (value, append, suffix)
self.environment_reqs = { 'UMASK':'0660'
, 'UMASK_DIR' : '0770'
, 'LC_ALL' : 'C'
, 'LC_CTYPE' : 'C'
, 'LC_COLLATE' : 'C'
, 'USE_RUNNING_SERVER' : "0"
, 'TOP_SRCDIR' : self.top_srcdir
, 'TOP_BUILDDIR' : self.top_builddir
, 'DRIZZLE_TEST_DIR' : self.code_tree.testdir
, 'DTR_BUILD_THREAD' : "-69.5"
, 'LD_LIBRARY_PATH' : self.append_env_var( 'LD_LIBRARY_PATH'
, self.ld_lib_paths
, suffix = 0
, quiet = 1
)
, 'DYLD_LIBRARY_PATH' : self.append_env_var( 'DYLD_LIBRARY_PATH'
, self.ld_lib_paths
, suffix = 0
, quiet = 1
)
}
# set the env vars we need
# self.process_environment_reqs(self.environment_reqs)
self.update_environment_vars(self.environment_reqs)
# We find or generate our id file
# We use a uuid to identify the symlinked
# workdirs. That way, each installation
# Will have a uuid/tmpfs workingdir
# We store in a file so we know what
# is ours
self.uuid = self.get_uuid()
self.symlink_name = 'dbqp_workdir_%s_%s' %(self.cur_user, self.uuid)
# initialize our workdir
self.process_workdir()
# check for libtool
self.libtool = self.libtool_check()
# do we need to setup for valgrind?
if self.valgrind:
self.handle_valgrind_reqs(variables['valgrindarglist'])
if self.debug:
self.logging.debug_class(self)
def get_code_tree(self, variables, tree_type):
"""Find out the important files, directories, and env. vars
for a particular type of tree. We import a definition module
depending on the tree_type. The module lets us know
what to look for, etc
"""
# Import the appropriate module that defines
# where we find what we need depending on
# tree type
test_tree = self.process_tree_type(tree_type, variables)
return test_tree
def process_tree_type(self, tree_type, variables):
"""Import the appropriate module depending on the type of tree
we are testing.
Drizzle is the only supported type currently
"""
if self.verbose:
self.logging.verbose("Processing source tree under test...")
if tree_type == 'drizzle':
# base_case
from lib.sys_mgmt.codeTree import drizzleTree
test_tree = drizzleTree(variables,self)
return test_tree
else:
self.logging.error("Tree_type: %s not supported yet" %(tree_type))
sys.exit(1)
def create_dirset(self, rootdir, dirset):
""" We produce the set of directories defined in dirset
dirset is a set of dictionaries like
{'dirname': 'subdir'}
or {'dirname': {'subdir':'subsubdir}}...
We generally expect there to be only a single
top-level key. The intent is to produce a dirset
rooted at key[0], with various subdirs under that
subsequest dirsets should be handles in separate calls...
"""
for dirname in dirset.keys():
full_path = os.path.join(rootdir, dirname)
subdirset = dirset[dirname]
if type(subdirset) is str:
self.create_symlink(subdirset,full_path)
else:
self.create_dir(full_path)
# dirset[dirname] is a new dictionary
if subdirset is None:
{}
else:
self.create_dirset(full_path,subdirset)
return full_path
def get_uuid(self):
""" We look to see if a uuid file exists
If so, we use that to know where to work
If not we produce one so future runs
have a definitive id to use
"""
uuid_file_name = os.path.join(self.datadir, 'uuid')
if os.path.exists(uuid_file_name):
uuid_file = open(uuid_file_name,'r')
uuid = uuid_file.readline().strip()
uuid_file.close()
else:
uuid = uuid4()
print uuid
print uuid4()
uuid_file = open(uuid_file_name,'w')
uuid_file.write(str(uuid))
uuid_file.close()
return uuid
def process_workdir(self):
""" We create our workdir, analyze relevant variables
to see if we should/shouldn't symlink to shm
We do nothing if we have --start-dirty
"""
if os.path.exists(self.workdir):
# our workdir already exists
if self.start_dirty:
self.logging.info("Using --start-dirty, not attempting to touch directories")
return
else:
self.remove_dir(self.workdir)
self.allocate_workdir()
def allocate_workdir(self):
""" Create a workdir according to user-supplied specs """
if self.no_shm:
self.logging.info("Using --no-shm, will not link workdir to shm")
self.create_dir(self.workdir, subdir=0)
elif self.shm_path == None:
self.logging.info("Could not find shared memory path for use. Not linking workdir to shm")
self.create_dir(self.workdir, subdir=0)
else:
shm_workdir = self.create_dir(os.path.join(self.shm_path, self.symlink_name))
self.logging.info("Linking workdir %s to %s" %(self.workdir, shm_workdir))
self.create_symlink(shm_workdir, self.workdir)
def create_dir(self, dirname, subdir =1 ):
""" Create a directory. If subdir = 1,
then the new dir should be a subdir of
self.workdir. Else, we just create dirname,
which should really be dirpath in this case
"""
if subdir:
full_path = os.path.join(self.workdir, dirname)
else:
full_path = dirname
if os.path.exists(full_path):
if self.start_dirty:
return full_path
else:
shutil.rmtree(full_path)
if self.debug:
self.logging.debug("Creating directory: %s" %(dirname))
os.makedirs(full_path)
return full_path
def remove_dir(self, dirname, require_empty=0 ):
""" Remove the directory in question.
We assume we want to brute-force clean
things. If require_empty = 0, then
the dir must be empty to remove it
"""
if self.debug:
self.logging.debug("Removing directory: %s" %(dirname))
if os.path.islink(dirname):
os.remove(dirname)
elif require_empty:
os.rmdir(dirname)
else:
shutil.rmtree(dirname)
def copy_dir(self, srcdir, tgtdir, overwrite = 1):
""" Copy the contents of srcdir to tgtdir.
We overwrite (remove/recreate) tgtdir
if overwrite == 1
"""
if self.debug:
self.logging.debug("Copying directory: %s to %s" %(srcdir, tgtdir))
if os.path.exists(tgtdir):
if overwrite:
self.remove_dir(tgtdir)
else:
self.logging.error("Cannot overwrite existing directory: %s" %(tgtdir))
sys.exit(1)
shutil.copytree(srcdir, tgtdir, symlinks=True)
def create_symlink(self, source, link_name):
""" We create a symlink to source named link_name """
if self.debug:
self.logging.debug("Creating symlink from %s to %s" %(source, link_name))
if os.path.exists(link_name) or os.path.islink(link_name):
os.remove(link_name)
return os.symlink(source, link_name)
def create_symlinks(self, needed_symlinks):
""" We created the symlinks in needed_symlinks
We expect it to be tuples in source, link_name format
"""
for needed_symlink in needed_symlinks:
source, link_name = needed_symlink
self.create_symlink(source, link_name)
def join_env_var_values(self, value_list):
""" Utility to join multiple values into a nice string
for setting an env var to
"""
return self.env_var_delimiter.join(value_list)
def set_env_var(self, var_name, var_value, quiet=0):
"""Set an environment variable. We really just abstract
voodoo on os.environ
"""
if self.debug and not quiet:
self.logging.debug("Setting env var: %s" %(var_name))
try:
os.environ[var_name]=var_value
except Exception, e:
self.logging.error("Issue setting environment variable %s to value %s" %(var_name, var_value))
self.logging.error("%s" %(e))
sys.exit(1)
def update_environment_vars(self, desired_vars, working_environment=None):
""" We update the environment vars with desired_vars
The expectation is that you know what you are asking for ; )
If working_environment is provided, we will update that with
desired_vars. We operate directly on os.environ by default
We return our updated environ dictionary
"""
if not working_environment:
working_environment = os.environ
working_environment.update(desired_vars)
return working_environment
def create_working_environment(self, desired_vars):
""" We return a copy of os.environ updated with desired_vars """
working_copy = copy.deepcopy(os.environ)
return self.update_environment_vars( desired_vars
, working_environment = working_copy )
def append_env_var(self, var_name, append_string, suffix=1, quiet=0):
""" We add the values in var_values to the environment variable
var_name. Depending on suffix value, we either append or prepend
we return a string suitable for os.putenv
"""
new_var_value = ""
if var_name in os.environ:
cur_var_value = os.environ[var_name]
if suffix: # We add new values to end of existing value
new_var_values = [ cur_var_value, append_string ]
else:
new_var_values = [ append_string, cur_var_value ]
new_var_value = self.env_var_delimiter.join(new_var_values)
else:
# No existing variable value
new_var_value = append_string
return new_var_value
def find_path(self, paths, required=1):
"""We search for the files we need / want to be aware of
such as the drizzled binary, the various client binaries, etc
We use the required switch to determine if we die or not
if we can't find the file.
We expect paths to be a list of paths, ordered in terms
of preference (ie we want to use something from search-path1
before search-path2).
We return None if no match found and this wasn't required
"""
for test_path in paths:
if self.debug:
self.logging.debug("Searching for path: %s" %(test_path))
if os.path.exists(test_path):
return test_path
if required:
self.logging.error("Required file not found out of options: %s" %(" ,".join(paths)))
sys.exit(1)
else:
return None
def execute_cmd(self, cmd, must_pass = 1):
""" Utility function to execute a command and
return the output and retcode
"""
if self.debug:
self.logging.debug("Executing command: %s" %(cmd))
(retcode, output)= commands.getstatusoutput(cmd)
if not retcode == 0 and must_pass:
self.logging.error("Command %s failed with retcode %d" %(cmd, retcode))
self.logging.error("%s" %(output))
sys.exit(1)
return retcode, output
def libtool_check(self):
""" We search for libtool """
libtool_path = '../libtool'
if os.path.exists(libtool_path) and os.access( libtool_path
, os.X_OK):
if self.valgrind or self.gdb:
self.logging.info("Using libtool when running valgrind or debugger")
return libtool_path
else:
return None
def handle_valgrind_reqs(self, optional_args, mode='valgrind'):
""" We do what voodoo we need to do to run valgrind """
valgrind_args = [ "--show-reachable=yes"
, "--malloc-fill=55"
, "--free-fill=55"
# , "--trace-children=yes" this is for callgrind only
]
if optional_args:
# we override the defaults with user-specified options
valgrind_args = optional_args
self.logging.info("Running valgrind with options: %s" %(" ".join(valgrind_args)))
# set our environment variable
self.set_env_var('VALGRIND_RUN', '1', quiet=0)
# generate command prefix to call valgrind
cmd_prefix = ''
if self.libtool:
cmd_prefix = "%s --mode=execute valgrind " %(self.libtool)
if mode == 'valgrind':
# default mode
args = [ "--tool=memcheck"
, "--leak-check=yes"
, "--num-callers=16"
]
# look for our suppressions file and add it to the mix if found
suppress_file = os.path.join(self.code_tree.testdir,'valgrind.supp')
if os.path.exists(suppress_file):
args = args + [ "--suppressions=%s" %(suppress_file) ]
cmd_prefix = cmd_prefix + " ".join(args + valgrind_args)
self.cmd_prefix = cmd_prefix
# add debug libraries to ld_library_path
debug_path = '/usr/lib/debug'
if os.path.exists(debug_path):
self.append_env_var("LD_LIBRARY_PATH", debug_path, suffix=1)
self.append_env_var("DYLD_LIBRARY_PATH", debug_path, suffix=1)
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