On 2018-01-18 22:01, Xi Kangjie wrote:
> Since kernel 4.9, the thread_info has been moved into task_struct,
> no longer locates at the bottom of kernel stack.
>
> See commits:
> - commit c65eacbe290b ("sched/core: Allow putting thread_info into
> task_struct")
> - commit 15f4eae70d36 ("x86: Move thread_info into task_struct")
>
> Before fix:
> (gdb) set $current = $lx_current()
> (gdb) p $lx_thread_info($current)
> $1 = {flags = 1470918301}
> (gdb) p $current.thread_info
> $2 = {flags = 2147483648}
>
> After fix:
> (gdb) p $lx_thread_info($current)
> $1 = {flags = 2147483648}
> (gdb) p $current.thread_info
> $2 = {flags = 2147483648}
>
> Signed-off-by: Xi Kangjie <imxikang...@gmail.com>
> ---
> scripts/gdb/linux/tasks.py | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/scripts/gdb/linux/tasks.py b/scripts/gdb/linux/tasks.py
> index 1bf949c43b76..f6ab3ccf698f 100644
> --- a/scripts/gdb/linux/tasks.py
> +++ b/scripts/gdb/linux/tasks.py
> @@ -96,6 +96,8 @@ def get_thread_info(task):
> thread_info_addr = task.address + ia64_task_size
> thread_info = thread_info_addr.cast(thread_info_ptr_type)
> else:
> + if task.type.fields()[0].type == thread_info_type.get_type():
> + return task['thread_info']
> thread_info = task['stack'].cast(thread_info_ptr_type)
> return thread_info.dereference()
>
>
Acked-by: Jan Kiszka <jan.kis...@siemens.com>
Andrew, please pick up.
Thanks,
Jan
--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux
