From a84be61d0e38034634e7cbe076179cc6f1c16d22 Mon Sep 17 00:00:00 2001 From: Kieran Bingham Date: Mon, 23 May 2016 16:24:42 -0700 Subject: [PATCH] scripts/gdb: provide kernel list item generators Facilitate linked-list items by providing a generator to return the dereferenced, and type-cast objects from a kernel linked list Link: http://lkml.kernel.org/r/2b0998564e6e5abe53585d466f87e491331fd2a4.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham Signed-off-by: Jan Kiszka Cc: Jeff Mahoney Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gdb/linux/lists.py | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/scripts/gdb/linux/lists.py b/scripts/gdb/linux/lists.py index 3a3775bc162b..2f335fbd86fd 100644 --- a/scripts/gdb/linux/lists.py +++ b/scripts/gdb/linux/lists.py @@ -18,6 +18,27 @@ from linux import utils list_head = utils.CachedType("struct list_head") +def list_for_each(head): + if head.type == list_head.get_type().pointer(): + head = head.dereference() + elif head.type != list_head.get_type(): + raise gdb.GdbError("Must be struct list_head not {}" + .format(head.type)) + + node = head['next'].dereference() + while node.address != head.address: + yield node.address + node = node['next'].dereference() + + +def list_for_each_entry(head, gdbtype, member): + for node in list_for_each(head): + if node.type != list_head.get_type().pointer(): + raise TypeError("Type {} found. Expected struct list_head *." + .format(node.type)) + yield utils.container_of(node, gdbtype, member) + + def list_check(head): nb = 0 if (head.type == list_head.get_type().pointer()):