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Subject[PATCHv3 02/13] scripts/gdb: Provide kernel list item generators
Date
Facilitate linked-list items by providing a generator to return
the dereferenced, and type-cast objects from a kernel linked list

CC: Jeff Mahoney <jeffm@suse.com>

Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
---
Changes since v1:
* items function removed, and replaced with Jeff Mahoney's cleaner
implementations of list_for_each, and list_for_each_entry
---
scripts/gdb/linux/lists.py | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)

diff --git a/scripts/gdb/linux/lists.py b/scripts/gdb/linux/lists.py
index 3a3775bc162b..9f4503738e26 100644
--- a/scripts/gdb/linux/lists.py
+++ b/scripts/gdb/linux/lists.py
@@ -18,6 +18,26 @@ 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 %s" % list_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 %s found. "
+ "Expected struct list_head *." % node.type)
+ yield utils.container_of(node, gdbtype, member)
+
+
def list_check(head):
nb = 0
if (head.type == list_head.get_type().pointer()):
--
2.5.0
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