linux-kernel - Re: perf script, libperf: python binding bug (bytearrays vs. strings)

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Message-ID: <20200928104311.GA412466@laniakea>
Date:   Mon, 28 Sep 2020 12:43:11 +0200
From:   Hagen Paul Pfeifer <hagen@...u.net>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: perf script, libperf: python binding bug (bytearrays vs. strings)

* Jiri Olsa | 2020-09-28 12:08:08 [+0200]:

>patch below fixes it for me, but seems strange this was
>working till now.. maybe you're the only one using this
>with python3 ;-)

and I thought python2 is obsolete and not maintained anymore ... ;-)
Anyway, the patch fixed everything: no more garbage for Python2 and Python3
as well as no bytearray type Python3!

Tested-by: Hagen Paul Pfeifer <hagen@...u.net>

Thank you Jiri!

Probably this patch should be applied on stable too!? Not sure when the 
problem was introduced.

Hagen

>jirka
>
>
>---
>diff --git a/tools/perf/util/print_binary.c b/tools/perf/util/print_binary.c
>index 599a1543871d..13fdc51c61d9 100644
>--- a/tools/perf/util/print_binary.c
>+++ b/tools/perf/util/print_binary.c
>@@ -50,7 +50,7 @@ int is_printable_array(char *p, unsigned int len)
> 
> 	len--;
> 
>-	for (i = 0; i < len; i++) {
>+	for (i = 0; i < len && p[i]; i++) {
> 		if (!isprint(p[i]) && !isspace(p[i]))
> 			return 0;
> 	}
>