gecko-dev/dom/base/usecounters.py
Mike Hommey e225a0e389 Bug 1228467 - Don't preprocess dom/base/UseCounters.conf. r=froydnj
There is no preprocessing directive in the file. Also, the current support for
preprocessing doesn't take into account any DEFINES that would be set in the
corresponding moz.build, which would be quite surprising would someone want
to use preprocessing on that file in the future.
2015-12-01 08:25:22 +09:00

72 lines
3.0 KiB
Python

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import buildconfig
import collections
import re
import StringIO
import sys
def read_conf(conf_filename):
# Can't read/write from a single StringIO, so make a new one for reading.
stream = open(conf_filename, 'rU')
def parse_counters(stream):
for line_num, line in enumerate(stream):
line = line.rstrip('\n')
if not line or line.startswith('//'):
# empty line or comment
continue
m = re.match(r'method ([A-Za-z0-9]+)\.([A-Za-z0-9]+)$', line)
if m:
interface_name, method_name = m.groups()
yield { 'type': 'method',
'interface_name': interface_name,
'method_name': method_name }
continue
m = re.match(r'attribute ([A-Za-z0-9]+)\.([A-Za-z0-9]+)$', line)
if m:
interface_name, attribute_name = m.groups()
yield { 'type': 'attribute',
'interface_name': interface_name,
'attribute_name': attribute_name }
continue
m = re.match(r'property ([A-Za-z0-9]+)$', line)
if m:
property_name = m.group(1)
yield { 'type': 'property',
'property_name': property_name }
continue
raise ValueError('error parsing %s at line %d' % (conf_filename, line_num))
return parse_counters(stream)
def generate_histograms(filename):
# The mapping for use counters to telemetry histograms depends on the
# ordering of items in the dictionary.
items = collections.OrderedDict()
for counter in read_conf(filename):
def append_counter(name, desc):
items[name] = { 'expires_in_version': 'never',
'kind' : 'boolean',
'description': desc }
def append_counters(name, desc):
append_counter('USE_COUNTER2_%s_DOCUMENT' % name, 'Whether a document %s' % desc)
append_counter('USE_COUNTER2_%s_PAGE' % name, 'Whether a page %s' % desc)
if counter['type'] == 'method':
method = '%s.%s' % (counter['interface_name'], counter['method_name'])
append_counters(method.replace('.', '_').upper(), 'called %s' % method)
elif counter['type'] == 'attribute':
attr = '%s.%s' % (counter['interface_name'], counter['attribute_name'])
counter_name = attr.replace('.', '_').upper()
append_counters('%s_getter' % counter_name, 'got %s' % attr)
append_counters('%s_setter' % counter_name, 'set %s' % attr)
elif counter['type'] == 'property':
prop = counter['property_name']
append_counters('PROPERTY_%s' % prop.replace('-', '_').upper(), "used the '%s' property" % prop)
return items