linux-kernel - Re: [PATCH 2/2] Fix issue with dmesg.py and python 3.X

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Date:	Wed, 4 May 2016 07:41:29 +0200
From:	Jan Kiszka <jan.kiszka@...mens.com>
To:	buzdelabuz2@...il.com, kieran@...uared.org.uk
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] Fix issue with dmesg.py and python 3.X

On 2016-05-04 05:12, buzdelabuz2@...il.com wrote:
> From: Dom Cote <buzdelabuz2+git@...il.com>
> 
> Replace the addition (+) of 2 python 'memoryview' objects
> with the addition of 2 'bytes' objects, convert the result
> back to memoryview.
> 
> Tested with python 3.4 and 2.7
> Tested with gdb 7.7

A word here on what setup was found broken would have been good. If you
have a sentence at hand, we can fold it in during merge.

> 
> Signed-off-by: Dom Cote <buzdelabuz2+git@...il.com>
> ---
>  scripts/gdb/linux/dmesg.py | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/scripts/gdb/linux/dmesg.py b/scripts/gdb/linux/dmesg.py
> index 927d0d2a3145..04d6719067f2 100644
> --- a/scripts/gdb/linux/dmesg.py
> +++ b/scripts/gdb/linux/dmesg.py
> @@ -33,11 +33,12 @@ class LxDmesg(gdb.Command):
>          if log_first_idx < log_next_idx:
>              log_buf_2nd_half = -1
>              length = log_next_idx - log_first_idx
> -            log_buf = inf.read_memory(start, length)
> +            log_buf = utils.read_memoryview(inf, start, length).tobytes()
>          else:
>              log_buf_2nd_half = log_buf_len - log_first_idx
> -            log_buf = inf.read_memory(start, log_buf_2nd_half) + \
> -                inf.read_memory(log_buf_addr, log_next_idx)
> +            a = utils.read_memoryview(inf, start, log_buf_2nd_half)
> +            b = utils.read_memoryview(inf, log_buf_addr, log_next_idx)
> +            log_buf = a.tobytes() + b.tobytes()
>  
>          pos = 0
>          while pos < log_buf.__len__():
> 

Patches look good to me on first glance. Need to try out as well.

Kieran?

Thanks,
Jan

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