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Subject[PATCH v6 12/21] scripts/gdb: Add task iteration class
Date
This class allows to iterate over all tasks of the target.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
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 <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
--
1.8.1.1.298.ge7eed54


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