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Pymod #17

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3bd4b32
crash.cache.modules: Implement simple module's cache
lorddoskias Mar 30, 2017
349d517
crash.command.pymod: Implement basic module loading support
lorddoskias Mar 30, 2017
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crash.cache.modules: Implement simple module's cache
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@lorddoskias
lorddoskias committed Mar 30, 2017
commit 3bd4b3291ef7fd9c42b0955f7f53eef1f5844b96
68 changes: 68 additions & 0 deletions crash/cache/modules.py
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#!/usr/bin/env python
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:

from __future__ import print_function
import os
import gdb
import sys
from crash.cache import CrashCache
from crash.types.list import list_for_each_entry

if sys.version_info.major >= 3:
long = int

class Kmod():
def __init__(self, obj):
self.name = obj['name'].string()
self.objfile = None
self._module = obj

def get_base_addr(self):
return long(self._module.address)

def get_size(self):
return long(self._module['core_size'])

def load_objfile(self, path):
self.objfile = os.path.abspath(path)
try:
gdb.execute("add-symbol-file {} {}".format(path, self._module['module_core']))
except gdb.error:
self.objfile = None
print("Error adding symbol informatation")

class KmodCache(CrashCache):
def __init__(self):
super(KmodCache, self).__init__()
self._modules = {}
self._cache_init = False

def init_modules_cache(self):
if self._cache_init: return

module_type = gdb.lookup_type('struct module')
modules = gdb.lookup_symbol('modules', None)[0].value()
for module in list_for_each_entry(modules, module_type, 'list'):
kmod = Kmod(module)
self._modules[kmod.name] = kmod

self._cache_init = True

def __len__(self):
return len(self._modules)

def __getitem__(self, key):
return self._modules[key]

def __contains__(self, item):
return item in self._modules

def __iter__(self):
return self._modules.__iter__()

def values(self):
return self._modules.values()

cache = KmodCache()