[3.7] bpo-36389: _PyObject_IsFreed() now also detects uninitialized memory (GH-12770)#12780
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[3.7] bpo-36389: _PyObject_IsFreed() now also detects uninitialized memory (GH-12770)#12780vstinner wants to merge 1 commit intopython:3.7from vstinner:freed37
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…H-12770) Rename _PyMem_IsFreed() function to _PyMem_IsPtrFreed(). The function is now way more efficient, it became a simple comparison on integers, rather than a short loop. It detects also uninitialized bytes and "forbidden bytes" filled by debug hooks on memory allocators. Add unit tests on _PyObject_IsFreed(). (cherry picked from commit 2b00db6)
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In master, I used a "static inline" function. To avoid any compilation issue in 3.7, I kept a regular function. |
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Oh, it seems like some buildbots are unhappy with my change in the master branch :-/ |
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I close this PR. I will redo it once my following fix will be merged in master. |
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Rename _PyMem_IsFreed() function to _PyMem_IsPtrFreed(). The function
is now way more efficient, it became a simple comparison on integers,
rather than a short loop. It detects also uninitialized bytes and
"forbidden bytes" filled by debug hooks on memory allocators.
Add unit tests on _PyObject_IsFreed().
(cherry picked from commit 2b00db6)
https://bugs.python.org/issue36389