LibC: Protect empty-but-kept-around ChunkedBlocks with PROT_NONE

We now keep a separate queue of empty ChunkedBlocks in each allocator.
The underlying memory for each block is mprotect'ed with PROT_NONE to
provoke crashes on use-after-free.

This is not going to catch *all* use-after-frees, but if it catches
some, that's still pretty nice. :^)

The malloc memory region names are now updated to reflect their reuse
status: "malloc: ChunkedBlock(size) (free/reused)"

0 files changed, 0 insertions, 0 deletions