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

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Date:	Sat, 23 Jan 2016 16:08:56 +0100
From:	Jan Kiszka <jan.kiszka@...mens.com>
To:	Kieran Bingham <kieran.bingham@...aro.org>
Cc:	linux-kernel@...r.kernel.org, maxime.coquelin@...com,
	peter.griffin@...aro.org, lee.jones@...aro.org
Subject: Re: [PATCH 2/5] scripts/gdb: Provide a kernel list item generator

On 2016-01-20 12:15, Kieran Bingham wrote:
> 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.

Location is fine. Maybe call it list_items?

> 
>  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()):
> 

Could you apply it on existing list iterations? module_list() seems like
a candidate, e.g.

Jan

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