gh-116869: Enable test_cext and test_cppext on Free Threading build (#116973)

Remove the "if Py_GIL_DISABLED" skip and move all "skip" decorators
to the class. Use support.check_sanitizer()

Author: vstinner

Lib/test/test_cext/__init__.py

@@ -4,7 +4,6 @@
 import os.path
 import shutil
 import subprocess
-import sysconfig
 import unittest
 from test import support
 
@@ -13,10 +12,15 @@
 SETUP = os.path.join(os.path.dirname(__file__), 'setup.py')
 
 
-# gh-110119: pip does not currently support 't' in the ABI flag use by
-# --disable-gil builds. Once it does, we can remove this skip.
-@unittest.skipIf(support.Py_GIL_DISABLED,
-                 'test does not work with --disable-gil')
+# With MSVC, the linker fails with: cannot open file 'python311.lib'
+# https://github.com/python/cpython/pull/32175#issuecomment-1111175897
+@unittest.skipIf(support.MS_WINDOWS, 'test fails on Windows')
+# Building and running an extension in clang sanitizing mode is not
+# straightforward
+@support.skip_if_sanitizer('test does not work with analyzing builds',
+                           address=True, memory=True, ub=True, thread=True)
+# the test uses venv+pip: skip if it's not available
+@support.requires_venv_with_pip()
 @support.requires_subprocess()
 @support.requires_resource('cpu')
 class TestExt(unittest.TestCase):
@@ -26,16 +30,6 @@ def test_build_c99(self):
     def test_build_c11(self):
         self.check_build('c11', '_test_c11_ext')
 
-    # With MSVC, the linker fails with: cannot open file 'python311.lib'
-    # https://github.com/python/cpython/pull/32175#issuecomment-1111175897
-    @unittest.skipIf(support.MS_WINDOWS, 'test fails on Windows')
-    # Building and running an extension in clang sanitizing mode is not
-    # straightforward
-    @unittest.skipIf(
-        '-fsanitize' in (sysconfig.get_config_var('PY_CFLAGS') or ''),
-        'test does not work with analyzing builds')
-    # the test uses venv+pip: skip if it's not available
-    @support.requires_venv_with_pip()
     def check_build(self, clang_std, extension_name):
         venv_dir = 'env'
         with support.setup_venv_with_pip_setuptools_wheel(venv_dir) as python_exe:

Lib/test/test_cppext/__init__.py

@@ -4,38 +4,31 @@
 import shutil
 import unittest
 import subprocess
-import sysconfig
 from test import support
 
 
 SOURCE = os.path.join(os.path.dirname(__file__), 'extension.cpp')
 SETUP = os.path.join(os.path.dirname(__file__), 'setup.py')
 
 
-# gh-110119: pip does not currently support 't' in the ABI flag use by
-# --disable-gil builds. Once it does, we can remove this skip.
-@unittest.skipIf(support.Py_GIL_DISABLED,
-                 'test does not work with --disable-gil')
+# With MSVC, the linker fails with: cannot open file 'python311.lib'
+# https://github.com/python/cpython/pull/32175#issuecomment-1111175897
+@unittest.skipIf(support.MS_WINDOWS, 'test fails on Windows')
+# Building and running an extension in clang sanitizing mode is not
+# straightforward
+@support.skip_if_sanitizer('test does not work with analyzing builds',
+                           address=True, memory=True, ub=True, thread=True)
+# the test uses venv+pip: skip if it's not available
+@support.requires_venv_with_pip()
 @support.requires_subprocess()
+@support.requires_resource('cpu')
 class TestCPPExt(unittest.TestCase):
-    @support.requires_resource('cpu')
     def test_build_cpp11(self):
         self.check_build(False, '_testcpp11ext')
 
-    @support.requires_resource('cpu')
     def test_build_cpp03(self):
         self.check_build(True, '_testcpp03ext')
 
-    # With MSVC, the linker fails with: cannot open file 'python311.lib'
-    # https://github.com/python/cpython/pull/32175#issuecomment-1111175897
-    @unittest.skipIf(support.MS_WINDOWS, 'test fails on Windows')
-    # Building and running an extension in clang sanitizing mode is not
-    # straightforward
-    @unittest.skipIf(
-        '-fsanitize' in (sysconfig.get_config_var('PY_CFLAGS') or ''),
-        'test does not work with analyzing builds')
-    # the test uses venv+pip: skip if it's not available
-    @support.requires_venv_with_pip()
     def check_build(self, std_cpp03, extension_name):
         venv_dir = 'env'
         with support.setup_venv_with_pip_setuptools_wheel(venv_dir) as python_exe: