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-rw-r--r--Objects/obmalloc.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index e919fad..be43c7a 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -1915,13 +1915,16 @@ _Py_GetAllocatedBlocks(void)
/* 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. If modified, _PyMem_IsPtrFreed() should be updated as well.
+ *
+ * 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().
*/
#undef CLEANBYTE
#undef DEADBYTE
#undef FORBIDDENBYTE
-#define CLEANBYTE 0xCB /* clean (newly allocated) memory */
-#define DEADBYTE 0xDB /* dead (newly freed) memory */
-#define FORBIDDENBYTE 0xFB /* untouchable bytes at each end of a block */
+#define CLEANBYTE 0xCD /* clean (newly allocated) memory */
+#define DEADBYTE 0xDD /* dead (newly freed) memory */
+#define FORBIDDENBYTE 0xFD /* untouchable bytes at each end of a block */
static size_t serialno = 0; /* incremented on each debug {m,re}alloc */