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authorJan Kiszka <jan.kiszka@siemens.com>2015-02-17 13:47:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:34:54 -0800
commit7704d58a8509c65e3f7e4407ca2e5fa6360349c1 (patch)
treee1da4e8ecd798c511ba442c652335abd882df0f4
parentscripts/gdb: add lx-dmesg command (diff)
downloadlinux-dev-7704d58a8509c65e3f7e4407ca2e5fa6360349c1.tar.xz
linux-dev-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>
-rw-r--r--scripts/gdb/linux/tasks.py46
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