bpo-32030: Rework memory allocators (#4625)
* Fix _PyMem_SetupAllocators("debug"): always restore allocators to
the defaults, rather than only caling _PyMem_SetupDebugHooks().
* Add _PyMem_SetDefaultAllocator() helper to set the "default"
allocator.
* Add _PyMem_GetAllocatorsName(): get the name of the allocators
* main() now uses debug hooks on memory allocators if Py_DEBUG is
defined, rather than calling directly malloc()
* Document default memory allocators in C API documentation
* _Py_InitializeCore() now fails with a fatal user error if
PYTHONMALLOC value is an unknown memory allocator, instead of
failing with a fatal internal error.
* Add new tests on the PYTHONMALLOC environment variable
* Add support.with_pymalloc()
* Add the _testcapi.WITH_PYMALLOC constant and expose it as
support.with_pymalloc().
* sysconfig.get_config_var('WITH_PYMALLOC') doesn't work on Windows, so
replace it with support.with_pymalloc().
* pythoninfo: add _testcapi collector for pymemdiff --git a/Lib/test/test_capi.py b/Lib/test/test_capi.py
index 7a10cda..2a6de3c 100644
--- a/Lib/test/test_capi.py
+++ b/Lib/test/test_capi.py
@@ -654,8 +654,7 @@
PYTHONMALLOC = 'malloc_debug'
-@unittest.skipUnless(sysconfig.get_config_var('WITH_PYMALLOC') == 1,
- 'need pymalloc')
+@unittest.skipUnless(support.with_pymalloc(), 'need pymalloc')
class PyMemPymallocDebugTests(PyMemDebugTests):
PYTHONMALLOC = 'pymalloc_debug'