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perf flamegraph: Explicitly set utf-8 encoding

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On some platforms the default encoding is not utf-8, which causes an
UnicodeDecodeError when reading the flamegraph template and writing the
flamegraph

Signed-off-by: Andreas Gerstmayr <agerstmayr@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200619153232.203537-1-agerstmayr@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andreas Gerstmayr 2020-06-19 17:32:31 +02:00 committed by Arnaldo Carvalho de Melo
parent 625d344978
commit c42ad5d435
1 changed files with 5 additions and 3 deletions
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8
tools/perf/scripts/python/flamegraph.py
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@ -17,6 +17,7 @@
from __future__ import print_function from __future__ import print_function
import sys import sys
import os import os
import io
import argparse import argparse
import json import json
@ -81,7 +82,7 @@ class FlameGraphCLI:
if self.args.format == "html": if self.args.format == "html":
try: 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 **/", output_str = f.read().replace("/** @flamegraph_json **/",
json_str) json_str)
except IOError as e: except IOError as e:
@ -93,11 +94,12 @@ class FlameGraphCLI:
output_fn = self.args.output or "stacks.json" output_fn = self.args.output or "stacks.json"
if output_fn == "-": 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: else:
print("dumping data to {}".format(output_fn)) print("dumping data to {}".format(output_fn))
try: try:
with open(output_fn, "w") as out: with io.open(output_fn, "w", encoding="utf-8") as out:
out.write(output_str) out.write(output_str)
except IOError as e: except IOError as e:
print("Error writing output file: {}".format(e), file=sys.stderr) print("Error writing output file: {}".format(e), file=sys.stderr)