LemonBoy b7eab32f42 std: Allocate tlscsprng memory as needed
Let mmap allocate a block of memory that's wide enough to use with
MADV_WIPEONFORK, madvise granularity is the current system page size
(using a static buffer of mem.page_size bytes would be wrong, that's the
minimum page size).

As a result, we don't zero some random chunk of memory every time we
fork the process.

Fixes #7609
2021-05-17 17:16:38 -04:00
..