Tim Peters <[email protected]> added the comment:
I'm skeptical ;-) If MTE is actually being used, system software assigns
"random" values to 4 of the higher-order bits. When obmalloc punts to the
system malloc, presumably those bits will be randomized in the addresses
returned by malloc. Then it's just not possible that obmalloc's
assert(HIGH_BITS(p) == HIGH_BITS(&arena_map_root));
can always succeed - we're insisting there that _all_ the high-order bits are
exactly the same as in the `&arena_map_root` file static. If `p` was actually
obtained from the system `malloc()`, it should fail about 15 times out of 16
(and regardless of which of the 16 bit patterns the platform C assigns to
&arena_map_root).
But, of course, that failure would only be seen in a debug build.
----------
nosy: +tim.peters
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<https://bugs.python.org/issue43593>
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