[3.6] bpo-9263: _PyObject_Dump() detects freed memory (GH-10061) (GH-10662) by vstinner · Pull Request #10663 · python/cpython (original) (raw)
- bpo-9263: _PyObject_Dump() detects freed memory (bpo-9263: _PyObject_Dump() detects freed memory #10061)
_PyObject_Dump() now uses an heuristic to check if the object memory
has been freed: log "" in that case.
The heuristic rely on the debug hooks on Python memory allocators
which fills the memory with DEADBYTE (0xDB) when memory is
deallocated. Use PYTHONMALLOC=debug to always enable these debug
hooks.
(cherry picked from commit 82af0b6)
- bpo-9263: Fix _PyObject_Dump() for freed object (bpo-9263: Fix _PyObject_Dump() for freed object #10661)
If _PyObject_Dump() detects that the object is freed, don't try to
dump it (exit immediately).
Enhance also _PyObject_IsFreed(): it now detects if the pointer
itself looks like freed memory.
(cherry picked from commit 2cf5d32)
(cherry picked from commit 95036ea)