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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-17 22:47:07 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 23:34:54 +0100 |
commit | 7704d58a8509c65e3f7e4407ca2e5fa6360349c1 (patch) | |
tree | e1da4e8ecd798c511ba442c652335abd882df0f4 /scripts | |
parent | scripts/gdb: add lx-dmesg command (diff) | |
download | linux-7704d58a8509c65e3f7e4407ca2e5fa6360349c1.tar.xz linux-7704d58a8509c65e3f7e4407ca2e5fa6360349c1.zip |
scripts/gdb: add task iteration class
This class allows to iterate over all tasks of the target.
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>
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/gdb/linux/tasks.py | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py new file mode 100644 index 000000000000..cd259846ab4b --- /dev/null +++ b/scripts/gdb/linux/tasks.py @@ -0,0 +1,46 @@ +# +# 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 |