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#!/usr/bin/env python3
#
# Copyright 2015 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# This is a utility for generating csv files based on GC traces produced by
# V8 when run with flags --trace-gc --trace-gc-nvp.
#
# Usage: gc-nvp-to-csv.py [-h] [filename]
#
# for py2/py3 compatibility
from __future__ import print_function
import argparse
import sys
import gc_nvp_common
def process_trace(f):
trace, keys = gc_nvp_common.parse_gc_trace_with_keys(f)
if trace:
print(*keys, sep=', ')
for entry in trace:
print(*(entry.get(key, '') for key in keys), sep=', ')
def main(args):
if args.filename:
with open(args.filename, 'rt') as f:
process_trace(f)
else:
process_trace(sys.stdin)
if __name__ == '__main__':
# Command line options.
parser = argparse.ArgumentParser(
description='Helper script for converting --trace-gc-nvp logs to CSV')
parser.add_argument('filename', type=str, nargs='?', help='GC trace log file')
args = parser.parse_args()
# Call the main function.
main(args)
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