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# 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
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