bpo-32030: Rework memory allocators by vstinner · Pull Request #4625 · python/cpython (original) (raw)

• 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.
• main() now uses debug hooks on memory allocators if Py_DEBUG is
  defined, rather than calling directly malloc()

https://bugs.python.org/issue32030

• 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

vstinner changed the titlebpo-32030: Fix _PyMem_SetupDebugHooks() bpo-32030: Rework memory allocators

Nov 29, 2017

I tested manually the PR. I ran "test_sys test_cmd_line test_capi" tests in these configurations:

• release, no pymalloc: "malloc": OK
• release, pymalloc: "pymalloc": OK
• pydebug, no pymalloc: "malloc_debug": OK
• pydebug, pymalloc: "pymalloc_debug": OK

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().