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gh-116417: Add _testlimitedcapi C extension (#116419)

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Add a new C extension "_testlimitedcapi" which is only built with the
limited C API.

Move heaptype_relative.c and vectorcall_limited.c from
Modules/_testcapi/ to Modules/_testlimitedcapi/.

* configure: add _testlimitedcapi test extension.
* Update generate_stdlib_module_names.py.
* Update make check-c-globals.

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
This commit is contained in:
Victor Stinner 2024-03-07 19:31:12 +01:00 • committed by GitHub
parent d9ccde28c4
commit d9bcdda39c
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GPG key ID: B5690EEEBB952194
23 changed files with 394 additions and 109 deletions
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54
Lib/test/test_capi/test_misc.py
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@ -47,6 +47,7 @@ except ModuleNotFoundError:
# Skip this test if the _testcapi module isn't available.
_testcapi = import_helper.import_module('_testcapi')
import _testlimitedcapi
import _testinternalcapi
@ -1124,7 +1125,7 @@ class TestHeapTypeRelative(unittest.TestCase):
# Test subclassing using "relative" basicsize, see PEP 697
def check(extra_base_size, extra_size):
Base, Sub, instance, data_ptr, data_offset, data_size = (
_testcapi.make_sized_heaptypes(
_testlimitedcapi.make_sized_heaptypes(
extra_base_size, -extra_size))
# no alignment shenanigans when inheriting directly
@ -1152,11 +1153,11 @@ class TestHeapTypeRelative(unittest.TestCase):
# we don't reserve (requested + alignment) or more data
self.assertLess(data_size - extra_size,
_testcapi.ALIGNOF_MAX_ALIGN_T)
_testlimitedcapi.ALIGNOF_MAX_ALIGN_T)
# The offsets/sizes we calculated should be aligned.
self.assertEqual(data_offset % _testcapi.ALIGNOF_MAX_ALIGN_T, 0)
self.assertEqual(data_size % _testcapi.ALIGNOF_MAX_ALIGN_T, 0)
self.assertEqual(data_offset % _testlimitedcapi.ALIGNOF_MAX_ALIGN_T, 0)
self.assertEqual(data_size % _testlimitedcapi.ALIGNOF_MAX_ALIGN_T, 0)
sizes = sorted({0, 1, 2, 3, 4, 7, 8, 123,
object.__basicsize__,
@ -1182,7 +1183,7 @@ class TestHeapTypeRelative(unittest.TestCase):
object.__basicsize__+1})
for extra_size in sizes:
with self.subTest(extra_size=extra_size):
Sub = _testcapi.subclass_var_heaptype(
Sub = _testlimitedcapi.subclass_var_heaptype(
_testcapi.HeapCCollection, -extra_size, 0, 0)
collection = Sub(1, 2, 3)
collection.set_data_to_3s()
@ -1196,7 +1197,7 @@ class TestHeapTypeRelative(unittest.TestCase):
with self.assertRaises(SystemError,
msg="Cannot extend variable-size class without "
+ "Py_TPFLAGS_ITEMS_AT_END"):
_testcapi.subclass_heaptype(int, -8, 0)
_testlimitedcapi.subclass_heaptype(int, -8, 0)
def test_heaptype_relative_members(self):
"""Test HeapCCollection subclasses work properly"""
@ -1209,7 +1210,7 @@ class TestHeapTypeRelative(unittest.TestCase):
for offset in sizes:
with self.subTest(extra_base_size=extra_base_size, extra_size=extra_size, offset=offset):
if offset < extra_size:
Sub = _testcapi.make_heaptype_with_member(
Sub = _testlimitedcapi.make_heaptype_with_member(
extra_base_size, -extra_size, offset, True)
Base = Sub.mro()[1]
instance = Sub()
@ -1228,29 +1229,29 @@ class TestHeapTypeRelative(unittest.TestCase):
instance.set_memb_relative(0)
else:
with self.assertRaises(SystemError):
Sub = _testcapi.make_heaptype_with_member(
Sub = _testlimitedcapi.make_heaptype_with_member(
extra_base_size, -extra_size, offset, True)
with self.assertRaises(SystemError):
Sub = _testcapi.make_heaptype_with_member(
Sub = _testlimitedcapi.make_heaptype_with_member(
extra_base_size, extra_size, offset, True)
with self.subTest(extra_base_size=extra_base_size, extra_size=extra_size):
with self.assertRaises(SystemError):
Sub = _testcapi.make_heaptype_with_member(
Sub = _testlimitedcapi.make_heaptype_with_member(
extra_base_size, -extra_size, -1, True)
def test_heaptype_relative_members_errors(self):
with self.assertRaisesRegex(
SystemError,
r"With Py_RELATIVE_OFFSET, basicsize must be negative"):
_testcapi.make_heaptype_with_member(0, 1234, 0, True)
_testlimitedcapi.make_heaptype_with_member(0, 1234, 0, True)
with self.assertRaisesRegex(
SystemError, r"Member offset out of range \(0\.\.-basicsize\)"):
_testcapi.make_heaptype_with_member(0, -8, 1234, True)
_testlimitedcapi.make_heaptype_with_member(0, -8, 1234, True)
with self.assertRaisesRegex(
SystemError, r"Member offset out of range \(0\.\.-basicsize\)"):
_testcapi.make_heaptype_with_member(0, -8, -1, True)
_testlimitedcapi.make_heaptype_with_member(0, -8, -1, True)
Sub = _testcapi.make_heaptype_with_member(0, -8, 0, True)
Sub = _testlimitedcapi.make_heaptype_with_member(0, -8, 0, True)
instance = Sub()
with self.assertRaisesRegex(
SystemError, r"PyMember_GetOne used with Py_RELATIVE_OFFSET"):
@ -2264,10 +2265,19 @@ class TestThreadState(unittest.TestCase):
_testcapi.test_current_tstate_matches()
def get_test_funcs(mod, exclude_prefix=None):
funcs = {}
for name in dir(mod):
if not name.startswith('test_'):
continue
if exclude_prefix is not None and name.startswith(exclude_prefix):
continue
funcs[name] = getattr(mod, name)
return funcs
class Test_testcapi(unittest.TestCase):
locals().update((name, getattr(_testcapi, name))
for name in dir(_testcapi)
if name.startswith('test_'))
locals().update(get_test_funcs(_testcapi))
# Suppress warning from PyUnicode_FromUnicode().
@warnings_helper.ignore_warnings(category=DeprecationWarning)
@ -2278,11 +2288,13 @@ class Test_testcapi(unittest.TestCase):
self.assertEqual(_testcapi.Py_Version, sys.hexversion)
class Test_testlimitedcapi(unittest.TestCase):
locals().update(get_test_funcs(_testlimitedcapi))
class Test_testinternalcapi(unittest.TestCase):
locals().update((name, getattr(_testinternalcapi, name))
for name in dir(_testinternalcapi)
if name.startswith('test_')
and not name.startswith('test_lock_'))
locals().update(get_test_funcs(_testinternalcapi,
exclude_prefix='test_lock_'))
@threading_helper.requires_working_threading()