From 7704d58a8509c65e3f7e4407ca2e5fa6360349c1 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 17 Feb 2015 13:47:07 -0800 Subject: [PATCH] scripts/gdb: add task iteration class This class allows to iterate over all tasks of the target. Signed-off-by: Jan Kiszka Cc: Thomas Gleixner Cc: Jason Wessel Cc: Andi Kleen Cc: Ben Widawsky Cc: Borislav Petkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gdb/linux/tasks.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 scripts/gdb/linux/tasks.py diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py new file mode 100644 index 0000000..cd25984 --- /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 +# +# 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 -- 2.7.4