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Commit a84be61d authored by Kieran Bingham's avatar Kieran Bingham Committed by Linus Torvalds
Browse files

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: default avatarKieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f197d75f

scripts/gdb/linux/lists.py

+21 −0
Original line number Diff line number Diff line
@@ -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()):