tree e5d41eaae806ccfb614baae8ea8e01ed080d987e
parent bac1f66b620854da534710b67b3baa235fcdfdd5
author Kostya Kortchinsky <kostyak@google.com> 1603310649 -0700
committer Copybara-Service <copybara-worker@google.com> 1603997262 -0700

[GWP-ASan] Move random-related code in the allocator

We need to have all thread specific data packed into a single `uintptr_t`
for the upcoming Fuchsia support. We can move the `RandomState` into the
`ThreadLocalPackedVariables`, reducing the size of `NextSampleCounter`
to 31 bits (or we could reduce `RandomState` to 31 bits).

We move `getRandomUnsigned32` into the platform agnostic part of the
class, and `initPRNG` in the platform specific part.

`ScopedBoolean` is replaced by actual assignments since non-const
references to bitfields are prohibited.

`random.{h,cpp}` are removed.

Differential Revision: https://reviews.llvm.org/D89908

GitOrigin-RevId: 9903b0586cfb76ef2401c342501e61e1bd3daa0f