[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
Change-Id: Ibc7dfc9b5ba520f2c49cf6a3ec9fa6a12282fe0b
3 files changed