[PATCH v9 0/13] implement dlmem() function

[Florian Weimer]

* Szabolcs Nagy via Libc-alpha:

> The 04/05/2023 12:29, stsp wrote:
>> - dl_iterate_phdr() seems to be calling the user
>>   callback under dl_load_write_lock lock.
>
> this is a known bug.

It's also not something we can fix because the libgcc unwinder has code
on it that relies on this implicit loader lock to protect its internal
data structures.  The libgcc unwinder can be statically linked, so we
can't remove the locking without adding a new symbol version.

I suspect other uses of dl_iterate_phdr are similar.

Thanks,
Florian