/
memtest.py
170 lines (150 loc) · 6.1 KB
/
memtest.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
# -*- coding: utf-8 -*-
#
# Copyright (C) 2012-2015 Ben Kurtovic <ben.kurtovic@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
"""
Tests for memory leaks in the CTokenizer. Python 2 and 3 compatible.
This appears to work mostly fine under Linux, but gives an absurd number of
false positives on OS X. I'm not sure why. Running the tests multiple times
yields different results (tests don't always leak, and the amount they leak by
varies). Increasing the number of loops results in a smaller bytes/loop value,
too, indicating the increase in memory usage might be due to something else.
Actual memory leaks typically leak very large amounts of memory (megabytes)
and scale with the number of loops.
"""
from __future__ import unicode_literals, print_function
from locale import LC_ALL, setlocale
from multiprocessing import Process, Pipe
from os import listdir, path
import sys
import psutil
from mwparserfromhell.compat import py3k
from mwparserfromhell.parser._tokenizer import CTokenizer
if sys.version_info[0] == 2:
range = xrange
LOOPS = 10000
class Color(object):
GRAY = "\x1b[30;1m"
GREEN = "\x1b[92m"
YELLOW = "\x1b[93m"
RESET = "\x1b[0m"
class MemoryTest(object):
"""Manages a memory test."""
def __init__(self):
self._tests = []
self._load()
def _parse_file(self, name, text):
tests = text.split("\n---\n")
counter = 1
digits = len(str(len(tests)))
for test in tests:
data = {"name": None, "label": None, "input": None, "output": None}
for line in test.strip().splitlines():
if line.startswith("name:"):
data["name"] = line[len("name:"):].strip()
elif line.startswith("label:"):
data["label"] = line[len("label:"):].strip()
elif line.startswith("input:"):
raw = line[len("input:"):].strip()
if raw[0] == '"' and raw[-1] == '"':
raw = raw[1:-1]
raw = raw.encode("raw_unicode_escape")
data["input"] = raw.decode("unicode_escape")
number = str(counter).zfill(digits)
fname = "test_{0}{1}_{2}".format(name, number, data["name"])
self._tests.append((fname, data["input"]))
counter += 1
def _load(self):
def load_file(filename):
with open(filename, "rU") as fp:
text = fp.read()
if not py3k:
text = text.decode("utf8")
name = path.split(filename)[1][:0-len(extension)]
self._parse_file(name, text)
root = path.split(path.dirname(path.abspath(__file__)))[0]
directory = path.join(root, "tests", "tokenizer")
extension = ".mwtest"
if len(sys.argv) > 2 and sys.argv[1] == "--use":
for name in sys.argv[2:]:
load_file(path.join(directory, name + extension))
sys.argv = [sys.argv[0]] # So unittest doesn't try to load these
else:
for filename in listdir(directory):
if not filename.endswith(extension):
continue
load_file(path.join(directory, filename))
@staticmethod
def _print_results(info1, info2):
r1, r2 = info1.rss, info2.rss
buff = 8192
if r2 - buff > r1:
d = r2 - r1
p = float(d) / r1
bpt = d // LOOPS
tmpl = "{0}LEAKING{1}: {2:n} bytes, {3:.2%} inc ({4:n} bytes/loop)"
sys.stdout.write(tmpl.format(Color.YELLOW, Color.RESET, d, p, bpt))
else:
sys.stdout.write("{0}OK{1}".format(Color.GREEN, Color.RESET))
def run(self):
"""Run the memory test suite."""
width = 1
for (name, _) in self._tests:
if len(name) > width:
width = len(name)
tmpl = "{0}[{1:03}/{2}]{3} {4}: "
for i, (name, text) in enumerate(self._tests, 1):
sys.stdout.write(tmpl.format(Color.GRAY, i, len(self._tests),
Color.RESET, name.ljust(width)))
sys.stdout.flush()
parent, child = Pipe()
p = Process(target=_runner, args=(text, child))
p.start()
try:
proc = psutil.Process(p.pid)
parent.recv()
parent.send("OK")
parent.recv()
info1 = proc.get_memory_info()
sys.stdout.flush()
parent.send("OK")
parent.recv()
info2 = proc.get_memory_info()
self._print_results(info1, info2)
sys.stdout.flush()
parent.send("OK")
finally:
proc.kill()
print()
def _runner(text, child):
r1, r2 = range(250), range(LOOPS)
for i in r1:
CTokenizer().tokenize(text)
child.send("OK")
child.recv()
child.send("OK")
child.recv()
for i in r2:
CTokenizer().tokenize(text)
child.send("OK")
child.recv()
if __name__ == "__main__":
setlocale(LC_ALL, "")
MemoryTest().run()