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import py
import pytest
from rpython.rlib import rgc
from pypy.interpreter.baseobjspace import ObjSpace
from pypy.interpreter.gateway import interp2app, unwrap_spec
from pypy.module.gc.interp_gc import StepCollector, W_GcCollectStepStats
class AppTestGC(object):
def setup_class(cls):
if cls.runappdirect:
pytest.skip("these tests cannot work with -A")
space = cls.space
def rgc_isenabled(space):
return space.newbool(rgc.isenabled())
cls.w_rgc_isenabled = space.wrap(interp2app(rgc_isenabled))
def test_collect(self):
import gc
gc.collect() # mostly a "does not crash" kind of test
gc.collect(0) # mostly a "does not crash" kind of test
def test_disable_finalizers(self):
import gc
class X(object):
created = 0
deleted = 0
def __init__(self):
X.created += 1
def __del__(self):
X.deleted += 1
class OldX:
created = 0
deleted = 0
def __init__(self):
OldX.created += 1
def __del__(self):
OldX.deleted += 1
def runtest(should_be_enabled):
runtest1(should_be_enabled, X)
runtest1(should_be_enabled, OldX)
def runtest1(should_be_enabled, Cls):
gc.collect()
if should_be_enabled:
assert Cls.deleted == Cls.created
else:
old_deleted = Cls.deleted
Cls(); Cls(); Cls()
gc.collect()
if should_be_enabled:
assert Cls.deleted == Cls.created
else:
assert Cls.deleted == old_deleted
runtest(True)
gc.disable_finalizers()
runtest(False)
runtest(False)
gc.enable_finalizers()
runtest(True)
# test nesting
gc.disable_finalizers()
gc.disable_finalizers()
runtest(False)
gc.enable_finalizers()
runtest(False)
gc.enable_finalizers()
runtest(True)
raises(ValueError, gc.enable_finalizers)
runtest(True)
def test_enable(self):
import gc
assert gc.isenabled()
assert self.rgc_isenabled()
gc.disable()
assert not gc.isenabled()
assert not self.rgc_isenabled()
gc.enable()
assert gc.isenabled()
assert self.rgc_isenabled()
gc.enable()
assert gc.isenabled()
assert self.rgc_isenabled()
def test_gc_collect_overrides_gc_disable(self):
import gc
deleted = []
class X(object):
def __del__(self):
deleted.append(1)
assert gc.isenabled()
gc.disable()
X()
gc.collect()
assert deleted == [1]
gc.enable()
def test_gc_collect_step(self):
import gc
class X(object):
deleted = 0
def __del__(self):
X.deleted += 1
gc.disable()
X(); X(); X();
n = 0
while True:
n += 1
if gc.collect_step().major_is_done:
break
assert n >= 2 # at least one step + 1 finalizing
assert X.deleted == 3
class AppTestGcDumpHeap(object):
pytestmark = py.test.mark.xfail(run=False)
def setup_class(cls):
import py
from rpython.tool.udir import udir
from rpython.rlib import rgc
class X(object):
def __init__(self, count, size, links):
self.count = count
self.size = size
self.links = links
def fake_heap_stats():
return [X(1, 12, [0, 0]), X(2, 10, [10, 0])]
cls._heap_stats = rgc._heap_stats
rgc._heap_stats = fake_heap_stats
fname = udir.join('gcdump.log')
cls.w_fname = cls.space.wrap(str(fname))
cls._fname = fname
def teardown_class(cls):
import py
from rpython.rlib import rgc
rgc._heap_stats = cls._heap_stats
assert py.path.local(cls._fname).read() == '1 12 0,0\n2 10 10,0\n'
def test_gc_heap_stats(self):
import gc
gc.dump_heap_stats(self.fname)
class AppTestGcMethodCache(object):
def test_clear_method_cache(self):
import gc, weakref
rlist = []
def f():
class C(object):
def f(self):
pass
C().f() # Fill the method cache
rlist.append(weakref.ref(C))
for i in range(10):
f()
gc.collect() # the classes C should all go away here
# the last class won't go in mapdict, as long as the code object of f
# is around
rlist.pop()
for r in rlist:
assert r() is None
def test_clear_index_cache(self):
import gc, weakref
rlist = []
def f():
class C(object):
def f(self):
pass
c = C()
c.x = 1
getattr(c, "x") # fill the index cache without using the local cache
getattr(c, "x")
rlist.append(weakref.ref(C))
for i in range(5):
f()
gc.collect() # the classes C should all go away here
for r in rlist:
assert r() is None
def test_StepCollector():
W = W_GcCollectStepStats
SCANNING = W.STATE_SCANNING
MARKING = W.STATE_MARKING
SWEEPING = W.STATE_SWEEPING
FINALIZING = W.STATE_FINALIZING
USERDEL = W.STATE_USERDEL
class MyStepCollector(StepCollector):
my_steps = 0
my_done = False
my_finalized = 0
def __init__(self):
StepCollector.__init__(self, space=None)
self._state_transitions = iter([
(SCANNING, MARKING),
(MARKING, SWEEPING),
(SWEEPING, FINALIZING),
(FINALIZING, SCANNING)])
def _collect_step(self):
self.my_steps += 1
try:
oldstate, newstate = next(self._state_transitions)
except StopIteration:
assert False, 'should not happen, did you call _collect_step too much?'
return rgc._encode_states(oldstate, newstate)
def _run_finalizers(self):
self.my_finalized += 1
sc = MyStepCollector()
transitions = []
while True:
result = sc.do()
transitions.append((result.oldstate, result.newstate, sc.my_finalized))
if result.major_is_done:
break
assert transitions == [
(SCANNING, MARKING, False),
(MARKING, SWEEPING, False),
(SWEEPING, FINALIZING, False),
(FINALIZING, USERDEL, False),
(USERDEL, SCANNING, True)
]
# there is one more transition than actual step, because
# FINALIZING->USERDEL is "virtual"
assert sc.my_steps == len(transitions) - 1
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