drgn/examples/linux/lsmod.py
Omar Sandoval c0d8709b45 Update copyright headers to Meta
Signed-off-by: Omar Sandoval <osandov@osandov.com>
2021-11-21 15:59:44 -08:00

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Python
Executable File

#!/usr/bin/env drgn
# Copyright (c) Meta Platforms, Inc. and affiliates.
# SPDX-License-Identifier: GPL-3.0-or-later
"""An implementation of lsmod(8) using drgn"""
from drgn.helpers.linux.list import list_for_each_entry
print("Module Size Used by")
for mod in list_for_each_entry("struct module", prog["modules"].address_of_(), "list"):
name = mod.name.string_().decode()
size = (mod.init_layout.size + mod.core_layout.size).value_()
refcnt = mod.refcnt.counter.value_() - 1
print(f"{name:19} {size:>8} {refcnt}", end="")
first = True
for use in list_for_each_entry(
"struct module_use", mod.source_list.address_of_(), "source_list"
):
if first:
print(" ", end="")
first = False
else:
print(",", end="")
print(use.source.name.string_().decode(), end="")
print()