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Commit 7704d58a authored by Jan Kiszka's avatar Jan Kiszka Committed by Linus Torvalds
Browse files

scripts/gdb: add task iteration class 



This class allows to iterate over all tasks of the target.

Signed-off-by: default avatarJan 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ae7dbaad

scripts/gdb/linux/tasks.py

0 → 100644
+46 −0
Original line number Diff line number Diff line 
#

# 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