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Commit05f2f0a

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DinoVcolesburytiranvstinner
authored
gh-90815: Add mimalloc memory allocator (#109914)
* Add mimalloc v2.12Modified src/alloc.c to remove include of alloc-override.c and notcompile new handler.Did not include the following files: - include/mimalloc-new-delete.h - include/mimalloc-override.h - src/alloc-override-osx.c - src/alloc-override.c - src/static.c - src/region.cmimalloc is thread safe and shares a single heap across all runtimes,therefore finalization and getting global allocated blocks across allruntimes is different.* mimalloc: minimal changes for use in Python: - remove debug spam for freeing large allocations - use same bytes (0xDD) for freed allocations in CPython and mimalloc This is important for the test_capi debug memory tests* Don't export mimalloc symbol in libpython.* Enable mimalloc as Python allocator option.* Add mimalloc MIT license.* Log mimalloc in Lib/test/pythoninfo.py.* Document new mimalloc support.* Use macro defs for exports as done in:#31164Co-authored-by: Sam Gross <colesbury@gmail.com>Co-authored-by: Christian Heimes <christian@python.org>Co-authored-by: Victor Stinner <vstinner@python.org>
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‎Doc/c-api/init_config.rst

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* ``PYMEM_ALLOCATOR_PYMALLOC_DEBUG`` (``6``): :ref:`Python pymalloc
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memory allocator <pymalloc>` with :ref:`debug hooks
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<pymem-debug-hooks>`.
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* ``PYMEM_ALLOCATOR_MIMALLOC`` (``6``): use ``mimalloc``, a fast
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malloc replacement.
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* ``PYMEM_ALLOCATOR_MIMALLOC_DEBUG`` (``7``): use ``mimalloc``, a fast
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malloc replacement with :ref:`debug hooks <pymem-debug-hooks>`.
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``PYMEM_ALLOCATOR_PYMALLOC`` and ``PYMEM_ALLOCATOR_PYMALLOC_DEBUG`` are
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not supported if Python is :option:`configured using --without-pymalloc
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<--without-pymalloc>`.
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``PYMEM_ALLOCATOR_MIMALLOC`` and ``PYMEM_ALLOCATOR_MIMALLOC_DEBUG`` are
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not supported if Python is :option:`configured using --without-mimalloc
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<--without-mimalloc>` or if the underlying atomic support isn't
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available.
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See :ref:`Memory Management <memory>`.
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Default: ``PYMEM_ALLOCATOR_NOT_SET``.

‎Doc/c-api/memory.rst

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* ``malloc``: system allocators from the standard C library, C functions:
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:c:func:`malloc`,:c:func:`calloc`,:c:func:`realloc` and:c:func:`free`.
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* ``pymalloc``::ref:`pymalloc memory allocator<pymalloc>`.
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* ``mimalloc``::ref:`mimalloc memory allocator<mimalloc>`. The pymalloc
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allocator will be used if mimalloc support isn't available.
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* "+ debug": with:ref:`debug hooks on the Python memory allocators
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<pymem-debug-hooks>`.
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* "Debug build"::ref:`Python build in debug mode<debug-build>`.
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Set the arena allocator.
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.. _mimalloc:
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The mimalloc allocator
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======================
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..versionadded::3.13
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Python supports the mimalloc allocator when the underlying platform support is available.
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mimalloc "is a general purpose allocator with excellent performance characteristics.
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Initially developed by Daan Leijen for the runtime systems of the Koka and Lean languages."
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tracemalloc C API
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=================

‎Doc/license.rst

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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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mimalloc
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--------
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MIT License
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Copyright (c) 2018-2021 Microsoft Corporation, Daan Leijen
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎Doc/using/cmdline.rst

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* ``pymalloc``: use the:ref:`pymalloc allocator<pymalloc>` for
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:c:macro:`PYMEM_DOMAIN_MEM` and:c:macro:`PYMEM_DOMAIN_OBJ` domains and use
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the:c:func:`malloc` function for the:c:macro:`PYMEM_DOMAIN_RAW` domain.
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* ``mimalloc``: use the:ref:`mimalloc allocator<mimalloc>` for
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:c:macro:`PYMEM_DOMAIN_MEM` and:c:macro:`PYMEM_DOMAIN_OBJ` domains and use
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the:c:func:`malloc` function for the:c:macro:`PYMEM_DOMAIN_RAW` domain.
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Install:ref:`debug hooks<pymem-debug-hooks>`:
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* ``debug``: install debug hooks on top of the:ref:`default memory
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allocators <default-memory-allocators>`.
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* ``malloc_debug``: same as ``malloc`` but also install debug hooks.
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* ``pymalloc_debug``: same as ``pymalloc`` but also install debug hooks.
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* ``mimalloc_debug``: same as ``mimalloc`` but also install debug hooks.
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..versionchanged::3.7
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Added the ``"default"`` allocator.

‎Doc/using/configure.rst

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Enable computed gotos in evaluation loop (enabled by default on supported
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compilers).
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..option::--without-mimalloc
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Disable the fast mimalloc allocator:ref:`mimalloc<mimalloc>`
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(enabled by default).
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See also:envvar:`PYTHONMALLOC` environment variable.
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..option::--without-pymalloc
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Disable the specialized Python memory allocator:ref:`pymalloc<pymalloc>`

‎Include/cpython/pymem.h

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PYMEM_ALLOCATOR_PYMALLOC=5,
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PYMEM_ALLOCATOR_PYMALLOC_DEBUG=6,
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#endif
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#ifdefWITH_MIMALLOC
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PYMEM_ALLOCATOR_MIMALLOC=7,
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PYMEM_ALLOCATOR_MIMALLOC_DEBUG=8,
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#endif
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}PyMemAllocatorName;
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