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#
# gdb helper commands and functions for Linux kernel debugging
#
# task & thread tools
#
# Copyright (c) Siemens AG, 2011-2013
#
# 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 utils
task_type = utils.CachedType("struct task_struct")
class TaskList:
def __init__(self):
global task_type
self.task_ptr_type = task_type.get_type().pointer()
self.init_task = gdb.parse_and_eval("init_task")
self.curr_group = self.init_task.address
self.curr_task = None
def __iter__(self):
return self
def next(self):
t = self.curr_task
if not t or t == self.curr_group:
self.curr_group = \
utils.container_of(self.curr_group['tasks']['next'],
self.task_ptr_type, "tasks")
if self.curr_group == self.init_task.address:
raise StopIteration
t = self.curr_task = self.curr_group
else:
self.curr_task = \
utils.container_of(t['thread_group']['next'],
self.task_ptr_type, "thread_group")
return t
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