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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 <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kieran Bingham 2016-05-23 16:24:42 -07:00 committed by Linus Torvalds
parent f197d75fca
commit a84be61d0e
1 changed files with 21 additions and 0 deletions
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21
scripts/gdb/linux/lists.py
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@ -18,6 +18,27 @@ from linux import utils
list_head = utils.CachedType("struct list_head") 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): def list_check(head):
nb = 0 nb = 0
if (head.type == list_head.get_type().pointer()): if (head.type == list_head.get_type().pointer()):