| # 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. |
| |
| # |
| # Common code for parsing --trace-gc-nvp output. |
| # |
| |
| |
| from __future__ import with_statement |
| import re |
| |
| |
| def split_nvp(s): |
| t = {} |
| for name, value in re.findall(r"([._\w]+)=([-\w]+(?:\.[0-9]+)?)", s): |
| try: |
| t[name] = float(value) |
| except ValueError: |
| t[name] = value |
| return t |
| |
| |
| def split_nvp_with_keys(s): |
| t, k = {}, [] |
| for name, value in re.findall(r"([._\w]+)=([-\w]+(?:\.[0-9]+)?)", s): |
| try: |
| t[name] = float(value) |
| except ValueError: |
| t[name] = value |
| k.append(name) |
| return t, k |
| |
| |
| def parse_gc_trace(input): |
| # If input is string, treat it as a filename and open the file for reading. |
| if isinstance(input, str): |
| with open(input, 'rt') as f: |
| return parse_gc_trace(f) |
| # Otherwise, treat it as a file-like object. |
| trace = [] |
| for line in input: |
| info = split_nvp(line) |
| if info and 'pause' in info and info['pause'] > 0: |
| info['i'] = len(trace) |
| trace.append(info) |
| return trace |
| |
| |
| def parse_gc_trace_with_keys(input): |
| # If input is string, treat it as a filename and open the file for reading. |
| if isinstance(input, str): |
| with open(input, 'rt') as f: |
| return parse_gc_trace_with_keys(f) |
| # Otherwise, treat it as a file-like object. |
| trace = [] |
| keys = {'i'} |
| key_list = ['i'] |
| for line in input: |
| info, info_keys = split_nvp_with_keys(line) |
| if info and 'pause' in info and info['pause'] > 0: |
| info['i'] = len(trace) |
| trace.append(info) |
| for key in info_keys: |
| if key not in keys: |
| keys.add(key) |
| key_list.append(key) |
| return trace, key_list |