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      1 # Copyright 2015 the V8 project authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 #
      6 # Common code for parsing --trace-gc-nvp output.
      7 #
      8 
      9 
     10 from __future__ import with_statement
     11 import re
     12 
     13 def split_nvp(s):
     14   t = {}
     15   for (name, value) in re.findall(r"([._\w]+)=([-\w]+(?:\.[0-9]+)?)", s):
     16     try:
     17       t[name] = float(value)
     18     except ValueError:
     19       t[name] = value
     20 
     21   return t
     22 
     23 
     24 def parse_gc_trace(input):
     25   trace = []
     26   with open(input) as f:
     27     for line in f:
     28       info = split_nvp(line)
     29       if info and 'pause' in info and info['pause'] > 0:
     30         info['i'] = len(trace)
     31         trace.append(info)
     32   return trace
     33