def test_mutate_exception(self):
"""
Exceptions saved in global module state get shared between
individual module instances. This test checks whether or not
a change in one interpreter's module gets reflected into the
other ones.
"""
import binascii
support.run_in_subinterp("import binascii; binascii.Error.foobar = 'foobar'")
self.assertFalse(hasattr(binascii.Error, "foobar"))
def test_module_state_shared_in_global(self):
"""
bpo-44050: Extension module state should be shared between interpreters
when it doesn't support sub-interpreters.
"""
r, w = os.pipe()
self.addCleanup(os.close, r)
self.addCleanup(os.close, w)
script = textwrap.dedent(f"""
import importlib.machinery
import importlib.util
import os
fullname = '_test_module_state_shared'
origin = importlib.util.find_spec('_testmultiphase').origin
loader = importlib.machinery.ExtensionFileLoader(fullname, origin)
spec = importlib.util.spec_from_loader(fullname, loader)
module = importlib.util.module_from_spec(spec)
attr_id = str(id(module.Error)).encode()
os.write({w}, attr_id)
""")
exec(script)
main_attr_id = os.read(r, 100)
ret = support.run_in_subinterp(script)
self.assertEqual(ret, 0)
subinterp_attr_id = os.read(r, 100)
self.assertEqual(main_attr_id, subinterp_attr_id)
def test_callbacks_leak_refcycle(self):
n = atexit._ncallbacks()
code = """if 1:
import atexit
def f():
pass
atexit.register(f)
atexit.__atexit = atexit
"""
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_subinterps(self):
import builtins
r, w = os.pipe()
code = """if 1:
import sys, builtins, pickle
with open({:d}, "wb") as f:
pickle.dump(id(sys.modules), f)
pickle.dump(id(builtins), f)
""".format(w)
with open(r, "rb") as f:
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertNotEqual(pickle.load(f), id(sys.modules))
self.assertNotEqual(pickle.load(f), id(builtins))
def test_subinterps(self):
import builtins
r, w = os.pipe()
code = """if 1:
import sys, builtins, pickle
with open({:d}, "wb") as f:
pickle.dump(id(sys.modules), f)
pickle.dump(id(builtins), f)
""".format(w)
with open(r, "rb") as f:
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertNotEqual(pickle.load(f), id(sys.modules))
self.assertNotEqual(pickle.load(f), id(builtins))
def test_callbacks_leak_refcycle(self):
# Similar to the above, but with a refcycle through the atexit
# module.
n = atexit._ncallbacks()
code = textwrap.dedent(r"""
import atexit
def f():
pass
atexit.register(f)
atexit.__atexit = atexit
""")
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_callbacks_leak_refcycle(self):
# Similar to the above, but with a refcycle through the atexit
# module.
n = atexit._ncallbacks()
code = r"""if 1:
import atexit
def f():
pass
atexit.register(f)
atexit.__atexit = atexit
"""
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_callbacks_leak(self):
# This test shows a leak in refleak mode if atexit doesn't
# take care to free callbacks in its per-subinterpreter module
# state.
n = atexit._ncallbacks()
code = textwrap.dedent(r"""
import atexit
def f():
pass
atexit.register(f)
del atexit
""")
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_callbacks_leak(self):
# This test shows a leak in refleak mode if atexit doesn't
# take care to free callbacks in its per-subinterpreter module
# state.
n = atexit._ncallbacks()
code = r"""if 1:
import atexit
def f():
pass
atexit.register(f)
del atexit
"""
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_callback_on_subinterpreter_teardown(self):
# This tests if a callback is called on
# subinterpreter teardown.
expected = b"The test has passed!"
r, w = os.pipe()
code = textwrap.dedent(r"""
import os
import atexit
def callback():
os.write({:d}, b"The test has passed!")
atexit.register(callback)
""".format(w))
ret = support.run_in_subinterp(code)
os.close(w)
self.assertEqual(os.read(r, len(expected)), expected)
os.close(r)
def test_callback_on_subinterpreter_teardown(self):
# This tests if a callback is called on
# subinterpreter teardown.
expected = b"The test has passed!"
r, w = os.pipe()
code = r"""if 1:
import os
import atexit
def callback():
os.write({:d}, b"The test has passed!")
atexit.register(callback)
""".format(w)
ret = support.run_in_subinterp(code)
os.close(w)
self.assertEqual(os.read(r, len(expected)), expected)
os.close(r)
def test_subinterps_recent_language_features(self):
r, w = os.pipe()
code = """if 1:
import pickle
with open({:d}, "wb") as f:
def noop(x): return x
a = (b := f'1{{2}}3') + noop('x') # Py 3.8 (:=) / 3.6 (f'')
async def foo(arg): return await arg # Py 3.5
pickle.dump(dict(a=a, b=b), f)
""".format(w)
with open(r, "rb") as f:
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(pickle.load(f), {'a': '123x', 'b': '123'})
def run_payload(payload: str) -> None:
support.run_in_subinterp(payload)
