New submission from Julian Taylor: The debug raw allocator do not return the same alignment as malloc. See _PyMem_DebugRawAlloc: https://github.com/python/cpython/blob/master/Objects/obmalloc.c#L1873
The line return p + 2*SST adds 2 * sizeof(size_t) to the pointer returned by malloc. On for example x32 malloc returns 16 byte aligned memory but size_t is 4 bytes. This makes all memory returned by the debug allocators not aligned the what the system assumes on such platforms. ---------- components: Interpreter Core messages: 292187 nosy: jtaylor priority: normal severity: normal status: open title: raw debug allocators to not return malloc alignment versions: Python 2.7, Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30150> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
