tree 7b5df7932f47960ae5814146dccd0b117099f464
parent bbcf5e0f1e79ea4375fa599e412ca255295f1322
author Mitch Phillips <31459023+hctim@users.noreply.github.com> 1581012428 -0800
committer Copybara-Service <copybara-worker@google.com> 1601491367 -0700

[GWP-ASan] Fix PRNG to use IE TLS.

Summary:
GWP-ASan's PRNG didn't use Initial-Exec TLS. Fix that to ensure that we don't
have infinite recursion, and also that we don't allocate a DTV on Android when
GWP-ASan is touched.

Test coverage ensuring that the sample counter is UINT32_MAX for an
uninitialised GWP-ASan is provided by gwp_asan/tests/late_init.cpp.

Reviewers: pcc, cferris

Reviewed By: pcc

Subscribers: #sanitizers, llvm-commits, rprichard, eugenis

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D74135

GitOrigin-RevId: 25de3f98b8a7436404dbc185040645f2549a8a8f