linux-kernel - Re: [PATCH 1/3] perf script python: Fix string vs byte array resolving

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Message-ID: <20160715131840.3a48a0ed@gandalf.local.home>
Date:	Fri, 15 Jul 2016 13:18:40 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jiri Olsa <jolsa@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Jiri Pirko <jiri@...lanox.com>,
	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 1/3] perf script python: Fix string vs byte array
 resolving

On Fri, 15 Jul 2016 09:29:55 +0200
Jiri Olsa <jolsa@...nel.org> wrote:

> +			if (field->flags & FIELD_IS_STRING &&
> +			    is_printable_array(data + offset, len)) {
> +				obj = PyString_FromString((char *) data + offset);

Hmm. As I stated, It is possible that strings can be non nul
terminated. But I'm looking here and thinking we need to make sure that
it is nul terminated.

Can PyString_FromString() handle a non nul terminated string?

-- Steve

> +			} else {
> +				obj = PyByteArray_FromStringAndSize((const char *) data + offset, len);
> +				field->flags &= ~FIELD_IS_STRING;
> +			}
>  		} else { /* FIELD_IS_NUMERIC */
>  			obj = get_field_numeric_entry(event, field, data);
>  		}