linux-kernel - Re: [PATCH v2] perf flamegraph: explicitly set utf-8 encoding

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Date:   Mon, 22 Jun 2020 13:31:27 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Andreas Gerstmayr <agerstmayr@...hat.com>
Cc:     linux-perf-users@...r.kernel.org,
        Michael Petlan <mpetlan@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] perf flamegraph: explicitly set utf-8 encoding

Em Fri, Jun 19, 2020 at 05:32:31PM +0200, Andreas Gerstmayr escreveu:
> on some platforms the default encoding is not utf-8,
> which causes an UnicodeDecodeError when reading the flamegraph template
> and writing the flamegraph

Thanks, applied.

- Arnaldo
 
> Signed-off-by: Andreas Gerstmayr <agerstmayr@...hat.com>
> ---
> 
> changelog v2: also write to stdout with utf-8 encoding
> 
>  tools/perf/scripts/python/flamegraph.py | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/scripts/python/flamegraph.py b/tools/perf/scripts/python/flamegraph.py
> index 61f3be9add6b..65780013f745 100755
> --- a/tools/perf/scripts/python/flamegraph.py
> +++ b/tools/perf/scripts/python/flamegraph.py
> @@ -17,6 +17,7 @@
>  from __future__ import print_function
>  import sys
>  import os
> +import io
>  import argparse
>  import json
>  
> @@ -81,7 +82,7 @@ class FlameGraphCLI:
>  
>          if self.args.format == "html":
>              try:
> -                with open(self.args.template) as f:
> +                with io.open(self.args.template, encoding="utf-8") as f:
>                      output_str = f.read().replace("/** @flamegraph_json **/",
>                                                    json_str)
>              except IOError as e:
> @@ -93,11 +94,12 @@ class FlameGraphCLI:
>              output_fn = self.args.output or "stacks.json"
>  
>          if output_fn == "-":
> -            sys.stdout.write(output_str)
> +            with io.open(sys.stdout.fileno(), "w", encoding="utf-8", closefd=False) as out:
> +                out.write(output_str)
>          else:
>              print("dumping data to {}".format(output_fn))
>              try:
> -                with open(output_fn, "w") as out:
> +                with io.open(output_fn, "w", encoding="utf-8") as out:
>                      out.write(output_str)
>              except IOError as e:
>                  print("Error writing output file: {}".format(e), file=sys.stderr)
> -- 
> 2.25.4
> 

-- 

- Arnaldo