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leaktest.py
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from __future__ import print_function
import System
import gc
class LeakTest:
"""A leak-check test for the objects implemented in the managed
runtime. For each kind of object tested, memory should reach
a particular level after warming up and stay essentially the
same, net of minor fluctuation induced by GC."""
def __init__(self):
self.count = 50000
self.quiet = 0
self._ws = 0
def notify(self, msg):
if not self.quiet:
print(msg)
def start_test(self):
System.GC.Collect(System.GC.MaxGeneration)
gc.collect()
self._ws = System.Environment.WorkingSet
def end_test(self):
start = self._ws
System.GC.Collect(System.GC.MaxGeneration)
gc.collect()
end = System.Environment.WorkingSet
diff = end - start
if diff > 0:
diff = '+%d' % diff
else:
diff = '%d' % diff
print(" start: %d end: %d diff: %s" % (start, end, diff))
print("")
def run(self):
self.testModules()
self.testClasses()
self.testEnumerations()
self.testEvents()
self.testDelegates()
def report(self):
import sys, gc
gc.collect()
dicttype = type({})
for item in gc.get_objects():
if type(item) != dicttype:
print(item, sys.getrefcount(item))
def testModules(self):
self.notify("Running module leak check...")
for i in xrange(self.count):
if i == 10:
self.start_test()
__import__('clr')
__import__('System')
__import__('System.IO')
__import__('System.Net')
__import__('System.Xml')
self.end_test()
def testClasses(self):
from System.Collections import Hashtable
from Python.Test import StringDelegate
from System import Int32
self.notify("Running class leak check...")
for i in xrange(self.count):
if i == 10:
self.start_test()
# Reference type
x = Hashtable()
del x
# Value type
x = Int32(99)
del x
# Delegate type
x = StringDelegate(hello)
del x
self.end_test()
def testEnumerations(self):
from Python import Test
self.notify("Running enum leak check...")
for i in xrange(self.count):
if i == 10:
self.start_test()
x = Test.ByteEnum.Zero
del x
x = Test.SByteEnum.Zero
del x
x = Test.ShortEnum.Zero
del x
x = Test.UShortEnum.Zero
del x
x = Test.IntEnum.Zero
del x
x = Test.UIntEnum.Zero
del x
x = Test.LongEnum.Zero
del x
x = Test.ULongEnum.Zero
del x
self.end_test()
def testEvents(self):
from Python.Test import EventTest, TestEventArgs
self.notify("Running event leak check...")
for i in xrange(self.count):
if i == 10:
self.start_test()
testob = EventTest()
# Instance method event handler
handler = GenericHandler()
testob.PublicEvent += handler.handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler.handler
del handler
# Vararg method event handler
handler = VariableArgsHandler()
testob.PublicEvent += handler.handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler.handler
del handler
# Callable object event handler
handler = CallableHandler()
testob.PublicEvent += handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler
del handler
# Callable vararg event handler
handler = VarCallableHandler()
testob.PublicEvent += handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler
del handler
# Static method event handler
handler = StaticMethodHandler()
StaticMethodHandler.value = None
testob.PublicEvent += handler.handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler.handler
del handler
# Class method event handler
handler = ClassMethodHandler()
ClassMethodHandler.value = None
testob.PublicEvent += handler.handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler.handler
del handler
# Managed instance event handler
testob.PublicEvent += testob.GenericHandler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= testob.GenericHandler
# Static managed event handler
testob.PublicEvent += EventTest.StaticHandler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= EventTest.StaticHandler
# Function event handler
dict = {'value': None}
def handler(sender, args, dict=dict):
dict['value'] = args.value
testob.PublicEvent += handler
testob.PublicEvent(testob, TestEventArgs(10))
testob.PublicEvent -= handler
del handler
self.end_test()
def testDelegates(self):
from Python.Test import DelegateTest, StringDelegate
import System
self.notify("Running delegate leak check...")
for i in xrange(self.count):
if i == 10:
self.start_test()
# Delegate from function
testob = DelegateTest()
d = StringDelegate(hello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d
# Delegate from instance method
inst = Hello()
testob = DelegateTest()
d = StringDelegate(inst.hello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del inst
del d
# Delegate from static method
testob = DelegateTest()
d = StringDelegate(Hello.s_hello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d
# Delegate from class method
testob = DelegateTest()
d = StringDelegate(Hello.c_hello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d
# Delegate from callable object
inst = Hello()
testob = DelegateTest()
d = StringDelegate(inst)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del inst
del d
# Delegate from managed instance method
testob = DelegateTest()
d = StringDelegate(testob.SayHello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d
# Delegate from managed static method
testob = DelegateTest()
d = StringDelegate(DelegateTest.StaticSayHello)
testob.CallStringDelegate(d)
testob.stringDelegate = d
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d
# Nested delegates
testob = DelegateTest()
d1 = StringDelegate(hello)
d2 = StringDelegate(d1)
testob.CallStringDelegate(d2)
testob.stringDelegate = d2
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d1
del d2
# Multicast delegates
testob = DelegateTest()
d1 = StringDelegate(hello)
d2 = StringDelegate(hello)
md = System.Delegate.Combine(d1, d2)
testob.CallStringDelegate(md)
testob.stringDelegate = md
testob.stringDelegate()
testob.stringDelegate = None
del testob
del d1
del d2
del md
self.end_test()
class GenericHandler:
"""A generic handler to test event callbacks."""
def __init__(self):
self.value = None
def handler(self, sender, args):
self.value = args.value
class VariableArgsHandler:
"""A variable args handler to test event callbacks."""
def __init__(self):
self.value = None
def handler(self, *args):
ob, eventargs = args
self.value = eventargs.value
class CallableHandler:
"""A callable handler to test event callbacks."""
def __init__(self):
self.value = None
def __call__(self, sender, args):
self.value = args.value
class VarCallableHandler:
"""A variable args callable handler to test event callbacks."""
def __init__(self):
self.value = None
def __call__(self, *args):
ob, eventargs = args
self.value = eventargs.value
class StaticMethodHandler(object):
"""A static method handler to test event callbacks."""
value = None
def handler(sender, args):
StaticMethodHandler.value = args.value
handler = staticmethod(handler)
class ClassMethodHandler(object):
"""A class method handler to test event callbacks."""
value = None
def handler(cls, sender, args):
cls.value = args.value
handler = classmethod(handler)
class Hello:
def hello(self):
return "hello"
def __call__(self):
return "hello"
def s_hello():
return "hello"
s_hello = staticmethod(s_hello)
def c_hello(cls):
return "hello"
c_hello = classmethod(c_hello)
def hello():
return "hello"
if __name__ == '__main__':
test = LeakTest()
test.run()
test.report()