tree 446cd5de8874686515d668e423a8b4cd6445cc87
parent 451c5e02a847e4c98681457c7f9639492e0efd34
author Kostya Kortchinsky <kostyak@google.com> 1621440630 -0700
committer Copybara-Service <copybara-worker@google.com> 1621995090 -0700

[scudo] Separate Fuchsia & Default SizeClassMap

The Fuchsia allocator config was using the default size class map.

This CL gives Fuchsia its own size class map and changes a couple of
things in the default one:
- make `SizeDelta` configurable in `Config` for a fixed size class map
  as it currently is for a table size class map;
- switch `SizeDelta` to 0 for the default config, it allows for size
  classes that allow for power of 2s, and overall better wrt pages
  filling;
- increase the max number of caches pointers to 14 in the default,
  this makes the transfer batch 64/128 bytes on 32/64-bit platforms,
  which is cache-line friendly (previous size was 48/96 bytes).

The Fuchsia size class map remains untouched for now, this doesn't
impact Android which uses the table size class map.

Differential Revision: https://reviews.llvm.org/D102783

GitOrigin-RevId: 20c1f94220d938936867cb047fb6444a187626ba