linux-kernel - [PATCH 2/5] scripts/gdb: Provide a kernel list item generator

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Message-Id: <1453288550-4706-3-git-send-email-kieran.bingham@linaro.org>
Date:	Wed, 20 Jan 2016 11:15:47 +0000
From:	Kieran Bingham <kieran.bingham@...aro.org>
To:	jan.kiszka@...mens.com
Cc:	Kieran Bingham <kieran.bingham@...aro.org>,
	linux-kernel@...r.kernel.org, maxime.coquelin@...com,
	peter.griffin@...aro.org, lee.jones@...aro.org
Subject: [PATCH 2/5] scripts/gdb: Provide a kernel list item generator

Facilitate linked-list items by providing a generator to return
the dereferenced, and type-cast objects from a kernel linked list

Signed-off-by: Kieran Bingham <kieran.bingham@...aro.org>
---

This is quite a useful wrapper to faciliate looping on lists.
It is sort of equivalent to the list_for_each_entry macro.

Let me know if it should be renamed, or live elsewhere.

 scripts/gdb/linux/lists.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/scripts/gdb/linux/lists.py b/scripts/gdb/linux/lists.py
index 3a3775bc162b..d2c6ce165cb1 100644
--- a/scripts/gdb/linux/lists.py
+++ b/scripts/gdb/linux/lists.py
@@ -18,6 +18,15 @@ from linux import utils
 list_head = utils.CachedType("struct list_head")
 
 
+def items(list_type, list_location, item_list):
+    """items Generator return items from a kernel linked list"""
+    item_list_head = item_list
+    next_item = item_list_head['next'].dereference()
+    while next_item != item_list_head:
+        yield utils.container_of(next_item, list_type, list_location)
+        next_item = next_item['next'].dereference()
+
+
 def list_check(head):
     nb = 0
     if (head.type == list_head.get_type().pointer()):
-- 
2.5.0