diff options
Diffstat (limited to 'Include/internal/pycore_pymem.h')
| -rw-r--r-- | Include/internal/pycore_pymem.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Include/internal/pycore_pymem.h b/Include/internal/pycore_pymem.h index 5be2d33..d61ff6e 100644 --- a/Include/internal/pycore_pymem.h +++ b/Include/internal/pycore_pymem.h @@ -154,6 +154,21 @@ PyAPI_FUNC(int) _PyMem_SetDefaultAllocator( PyMemAllocatorDomain domain, PyMemAllocatorEx *old_alloc); +/* Special bytes broadcast into debug memory blocks at appropriate times. + Strings of these are unlikely to be valid addresses, floats, ints or + 7-bit ASCII. + + - PYMEM_CLEANBYTE: clean (newly allocated) memory + - PYMEM_DEADBYTE dead (newly freed) memory + - PYMEM_FORBIDDENBYTE: untouchable bytes at each end of a block + + Byte patterns 0xCB, 0xBB and 0xFB have been replaced with 0xCD, 0xDD and + 0xFD to use the same values than Windows CRT debug malloc() and free(). + If modified, _PyMem_IsPtrFreed() should be updated as well. */ +#define PYMEM_CLEANBYTE 0xCD +#define PYMEM_DEADBYTE 0xDD +#define PYMEM_FORBIDDENBYTE 0xFD + /* Heuristic checking if a pointer value is newly allocated (uninitialized), newly freed or NULL (is equal to zero). |