linux_dsm_epyc7002/scripts/gdb/linux/modules.py

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#
# gdb helper commands and functions for Linux kernel debugging
#
# module tools
#
# Copyright (c) Siemens AG, 2013
#
# Authors:
# Jan Kiszka <jan.kiszka@siemens.com>
#
# This work is licensed under the terms of the GNU GPL version 2.
#
import gdb
from linux import cpus, utils, lists
module_type = utils.CachedType("struct module")
def module_list():
global module_type
modules = utils.gdb_eval_or_none("modules")
if modules is None:
return
module_ptr_type = module_type.get_type().pointer()
for module in lists.list_for_each_entry(modules, module_ptr_type, "list"):
yield module
scripts/gdb: port to python3 / gdb7.7 I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled against python 3.3) but there were several errors. I believe this patch fixes these issues so that the commands now work (I tested lx-symbols, lx-dmesg, lx-lsmod). Main issues that needed to be resolved: * In python 2 iterators have a "next()" method. In python 3 it is __next__() instead (so let's just add both). * In older python versions there was an implicit conversion in object.__format__() (used when an object is in string.format()) where it was converting the object to str first and then calling str's __format__(). This has now been removed so we must explicitly convert to str the objects for which we need to keep this behavior. * In dmesg.py: in python 3 log_buf is now a "memoryview" object which needs to be converted to a string in order to use string methods like "splitlines()". Luckily memoryview exists in python 2.7.6 as well, so we can convert log_buf to memoryview and use the same code in both python 2 and python 3. This version of the patch has now been tested with gdb 7.7 and both python 3.4 and python 2.7.6 (I think asking for at least python 2.7.6 is a reasonable requirement instead of complicating the code with version checks etc). Signed-off-by: Pantelis Koukousoulas <pktoss@gmail.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18 04:47:35 +07:00
def find_module_by_name(name):
for module in module_list():
if module['name'].string() == name:
return module
return None
class LxModule(gdb.Function):
"""Find module by name and return the module variable.
$lx_module("MODULE"): Given the name MODULE, iterate over all loaded modules
of the target and return that module variable which MODULE matches."""
def __init__(self):
super(LxModule, self).__init__("lx_module")
def invoke(self, mod_name):
mod_name = mod_name.string()
module = find_module_by_name(mod_name)
if module:
return module.dereference()
else:
raise gdb.GdbError("Unable to find MODULE " + mod_name)
LxModule()
class LxLsmod(gdb.Command):
"""List currently loaded modules."""
_module_use_type = utils.CachedType("struct module_use")
def __init__(self):
super(LxLsmod, self).__init__("lx-lsmod", gdb.COMMAND_DATA)
def invoke(self, arg, from_tty):
gdb.write(
"Address{0} Module Size Used by\n".format(
" " if utils.get_long_type().sizeof == 8 else ""))
for module in module_list():
layout = module['core_layout']
gdb.write("{address} {name:<19} {size:>8} {ref}".format(
address=str(layout['base']).split()[0],
name=module['name'].string(),
size=str(layout['size']),
ref=str(module['refcnt']['counter'] - 1)))
t = self._module_use_type.get_type().pointer()
first = True
sources = module['source_list']
for use in lists.list_for_each_entry(sources, t, "source_list"):
gdb.write("{separator}{name}".format(
separator=" " if first else ",",
name=use['source']['name'].string()))
first = False
gdb.write("\n")
LxLsmod()