# Volatility
#
# Authors:
# Mike Auty <mike.auty@gmail.com>
#
# This file is part of Volatility.
#
# Volatility 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.
#
# Volatility 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 Volatility. If not, see <http://www.gnu.org/licenses/>.
#
import sys
import itertools
import timeit
class ScanProfInstance(object):
def __init__(self, func, *args):
self.func = func
self.args = args
self.results = []
def __call__(self):
self.results = self.func(*self.args)
def permscan(self, address_space, offset = 0, maxlen = None):
times = []
# Run a warm-up scan to ensure the file is cached as much as possible
self.oldscan(address_space, offset, maxlen)
perms = list(itertools.permutations(self.checks))
for i in range(len(perms)):
self.checks = perms[i]
print "Running scan {0}/{1}...".format(i + 1, len(perms))
profobj = ScanProfInstance(self.oldscan, address_space, offset, maxlen)
value = timeit.timeit(profobj, number = self.repeats)
times.append((value, len(list(profobj.results)), i))
print "Scan results"
print "{0:20} | {1:7} | {2:6} | {3}".format("Time", "Results", "Perm #", "Ordering")
for val, l, ordering in sorted(times):
print "{0:20} | {1:7} | {2:6} | {3}".format(val, l, ordering, perms[ordering])
sys.exit(1)
def ScanProfiler(cls, repeats = 3):
cls.repeats = repeats
cls.oldscan = cls.scan
cls.scan = permscan
return cls
