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Check the GIL in PyObject_Malloc()

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Issue #26558: The debug hook of PyObject_Malloc() now checks that the GIL is
held when the function is called.
This commit is contained in:
Victor Stinner 2016-03-14 22:26:53 +01:00
parent 8a1be61849
commit c4aec3628b
6 changed files with 119 additions and 34 deletions
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9
Doc/c-api/memory.rst
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@ -341,10 +341,13 @@ Customize Memory Allocators
Newly allocated memory is filled with the byte ``0xCB``, freed memory is
filled with the byte ``0xDB``. Additional checks:
- detect API violations, ex: :c:func:`PyObject_Free` called on a buffer
- Detect API violations, ex: :c:func:`PyObject_Free` called on a buffer
allocated by :c:func:`PyMem_Malloc`
- detect write before the start of the buffer (buffer underflow)
- detect write after the end of the buffer (buffer overflow)
- Detect write before the start of the buffer (buffer underflow)
- Detect write after the end of the buffer (buffer overflow)
- Check that the :term:`GIL <global interpreter lock>` is held when
allocator functions of the :c:data:`PYMEM_DOMAIN_OBJ` domain (ex:
:c:func:`PyObject_Malloc`) are called
These hooks are installed by default if Python is compiled in debug
mode. The :envvar:`PYTHONMALLOC` environment variable can be used to install