tree c1fe0293bcc5543874f78c3a1d3fa1bd9bfe512d
parent 3b50af730d322665fa6b1d813068bfb16eb5b594
author Kostya Kortchinsky <kostyak@google.com> 1581895786 -0800
committer Copybara-Service <copybara-worker@google.com> 1598597838 -0700

[scudo][standalone] Shift some data from dynamic to static

Summary:
Most of our larger data is dynamically allocated (via `map`) but it
became an hindrance with regard to init time, for a cost to benefit
ratio that is not great. So change the `TSD`s, `RegionInfo`, `ByteMap`
to be static.

Additionally, for reclaiming, we used mapped & unmapped a buffer each
time, which is costly. It turns out that we can have a static buffer,
and that there isn't much contention on it.

One of the other things changed here, is that we hard set the number
of TSDs on Android to the maximum number, as there could be a
situation where cores are put to sleep and we could miss some.

Subscribers: mgorny, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D74696

GitOrigin-RevId: fc69967a4b98df34c03a3c57134940688b863dff