blob: ee84d99266944f4b35a8de1e320b26cf4ad5c103 (
plain)
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
|
"""Monkey-patching to make coverage work right in some cases."""
import multiprocessing
import multiprocessing.process
import sys
# An attribute that will be set on modules to indicate that they have been
# monkey-patched.
MARKER = "_coverage$patched"
def patch_multiprocessing():
"""Monkey-patch the multiprocessing module.
This enables coverage measurement of processes started by multiprocessing.
This is wildly experimental!
"""
if hasattr(multiprocessing, MARKER):
return
if sys.version_info >= (3, 4):
klass = multiprocessing.process.BaseProcess
else:
klass = multiprocessing.Process
original_bootstrap = klass._bootstrap
class ProcessWithCoverage(klass):
"""A replacement for multiprocess.Process that starts coverage."""
def _bootstrap(self):
from coverage import Coverage
cov = Coverage(data_suffix=True)
cov.start()
try:
return original_bootstrap(self)
finally:
cov.stop()
cov.save()
if sys.version_info >= (3, 4):
klass._bootstrap = ProcessWithCoverage._bootstrap
else:
multiprocessing.Process = ProcessWithCoverage
setattr(multiprocessing, MARKER, 1)
|
