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Statistics: Record unexpected page errors. Fixes issue #102.

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This commit is contained in:
Mike Auty
2019-10-24 20:59:12 +01:00
parent c88da2a16a
commit 2603c29ff7
1 changed files with 20 additions and 8 deletions
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volatility/plugins/windows/statistics.py
+20 -8
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@@ -1,7 +1,7 @@
# This file is Copyright 2019 Volatility Foundation and licensed under the Volatility Software License 1.0
# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
#
import logging
from typing import List
from volatility.framework import renderers, exceptions, interfaces
@@ -9,6 +9,8 @@ from volatility.framework.configuration import requirements
from volatility.framework.interfaces import plugins
from volatility.framework.layers import intel
vollog = logging.getLogger(__name__)
class Statistics(plugins.PluginInterface):
@@ -24,35 +26,45 @@ class Statistics(plugins.PluginInterface):
# Do mass mapping and determine the number of different layers and how many pages go to each one
layer = self.context.layers[self.config['primary']]
page_count = swap_count = invalid_page_count = large_page_count = large_swap_count = large_invalid_count = 0
page_count = swap_count = invalid_page_count = large_page_count = large_swap_count = large_invalid_count = other_invalid = 0
if isinstance(layer, intel.Intel):
page_addr = 0
expected_page_size = 1 << layer.bits_per_register
while page_addr < layer.maximum_address:
try:
_, _, page_size, layer_name = list(layer.mapping(page_addr, 0x2000))[0]
_, _, page_size, layer_name = list(layer.mapping(page_addr, 2 * expected_page_size))[0]
if layer_name != layer.config['memory_layer']:
swap_count += 1
else:
page_count += 1
if page_size > 0x1000:
if page_size > expected_page_size:
large_page_count += 1
except exceptions.SwappedInvalidAddressException as excp:
swap_count += 1
page_size = (1 << excp.invalid_bits)
if page_size != 0x1000:
if page_size != expected_page_size:
large_swap_count += 1
except exceptions.PagedInvalidAddressException as excp:
invalid_page_count += 1
page_size = (1 << excp.invalid_bits)
if page_size != 0x1000:
if page_size != expected_page_size:
large_invalid_count += 1
except exceptions.InvalidAddressException as excp:
other_invalid += 1
page_size = expected_page_size
vollog.debug("A non-page lookup invalid address exception occurred at: {} in layer {}".format(
hex(excp.invalid_address), excp.layer_name))
page_addr += page_size
self._progress_callback((page_addr * 100) / layer.maximum_address, "Reading memory")
yield (0, (page_count, large_page_count, swap_count, large_swap_count, invalid_page_count, large_invalid_count))
yield (0, (page_count, large_page_count, swap_count, large_swap_count, invalid_page_count, large_invalid_count,
other_invalid))
def run(self):
return renderers.TreeGrid([("Valid pages (all)", int), ("Valid pages (large)", int),
("Swapped Pages (all)", int), ("Swapped Pages (large)", int),
("Invalid Pages (all)", int), ("Invalid Pages (large)", int)], self._generator())
("Invalid Pages (all)", int), ("Invalid Pages (large)", int),
("Other Invalid Pages (all)", int)], self._generator())