tree 99c657932a2660994ba63f249db1f7db0680b530
parent 996049d45c81f55a4bf4e98cb741621d8876a586
author Kostya Kortchinsky <kostyak@google.com> 1598640279 -0700
committer Copybara-Service <copybara-worker@google.com> 1600301358 -0700

[scudo][standalone] Enable secondary cache release on Fuchsia

I had left this as a TODO, but it turns out it wasn't complicated.
By specifying `MAP_RESIZABLE`, it allows us to keep the VMO which we
can then use for release purposes.
`releasePagesToOS` also had to be called the "proper" way, as Fuchsia
requires the `Offset` field to be correct. This has no impact on
non-Fuchsia platforms.

Differential Revision: https://reviews.llvm.org/D86800

GitOrigin-RevId: 00d9907a7ac86c3aa49c8cbb21a97094b5887ea9