mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-24 19:54:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-32030: Rework memory allocators (#4625)

Browse source 
* 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 pymem
This commit is contained in:
Victor Stinner 2017-11-29 17:20:38 +01:00 • committed by GitHub
parent c15bb49d71
commit 5d39e04290
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
14 changed files with 405 additions and 171 deletions
Download patch file Download diff file Expand all files Collapse all files

19
Doc/using/cmdline.rst
View file

@ -687,6 +687,8 @@ conflict.
Set the family of memory allocators used by Python:
* ``default``: use the :ref:`default memory allocators
<default-memory-allocators>`.
* ``malloc``: use the :c:func:`malloc` function of the C library
for all domains (:c:data:`PYMEM_DOMAIN_RAW`, :c:data:`PYMEM_DOMAIN_MEM`,
:c:data:`PYMEM_DOMAIN_OBJ`).
@ -696,20 +698,17 @@ conflict.
Install debug hooks:
* ``debug``: install debug hooks on top of the default memory allocator
* ``debug``: install debug hooks on top of the :ref:`default memory
allocators <default-memory-allocators>`.
* ``malloc_debug``: same as ``malloc`` but also install debug hooks
* ``pymalloc_debug``: same as ``pymalloc`` but also install debug hooks
When Python is compiled in release mode, the default is ``pymalloc``. When
compiled in debug mode, the default is ``pymalloc_debug`` and the debug hooks
are used automatically.
See the :ref:`default memory allocators <default-memory-allocators>` and the
:c:func:`PyMem_SetupDebugHooks` function (install debug hooks on Python
memory allocators).
If Python is configured without ``pymalloc`` support, ``pymalloc`` and
``pymalloc_debug`` are not available, the default is ``malloc`` in release
mode and ``malloc_debug`` in debug mode.
See the :c:func:`PyMem_SetupDebugHooks` function for debug hooks on Python
memory allocators.
.. versionchanged:: 3.7
Added the ``"default"`` allocator.
.. versionadded:: 3.6