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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Performs basic parsing of an AFDO text-based profile.
This short script performs very basic parsing of an AFDO text-based profile
into a dictionary which associates each top-level function with its profile
data (as plain text), and these results are dumped to a pickle file.
"""
from __future__ import print_function
from absl import app
from absl import flags
import json
import pprint
flags.DEFINE_string('afdo_text', None, 'AFDO text-based profile to be parsed')
flags.DEFINE_string('output_file', None, 'File to write JSON results to')
FLAGS = flags.FLAGS
def parse_afdo(f):
"""Performs basic parsing of an AFDO text-based profile.
This parsing expects an input file of the form generated by bin/llvm-profdata
(within an LLVM build).
"""
results = {}
curr_func = None
curr_data = []
for line in f:
if not line.startswith(' '):
if curr_func:
results[curr_func] = ''.join(curr_data)
curr_data = []
curr_func, rest = line.split(':', 1)
curr_func = curr_func.strip()
curr_data.append(':' + rest)
else:
curr_data.append(line)
if curr_func:
results[curr_func] = ''.join(curr_data)
return results
def main(_):
with open(FLAGS.afdo_text) as f:
results = parse_afdo(f)
if FLAGS.output_file:
with open(FLAGS.output_file, 'wb') as f_out:
json.dump(results, f_out, indent=2)
else:
pprint.pprint(results)
if __name__ == '__main__':
flags.mark_flag_as_required('afdo_text')
app.run(main)
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