commit 0d8608d7c4ed376d67c1feef4466a83f47fa1948
author Alexander Potapenko <glider@google.com> Wed Aug 24 11:58:59 2022 +0200
committer Copybara-Service <copybara-worker@google.com> Fri Aug 26 01:25:26 2022 -0700
tree 16de6aa7992ec1edd6fd54c71d72289b6dc77087
parent 2bc38d51a24ff30f845a9892cb7bb748d451c72d

[compiler-rt][hwasan] Support for Intel LAM v6 API

Version 6 of Intel LAM kernel patches
(https://lore.kernel.org/all/20220815041803.17954-1-kirill.shutemov@linux.intel.com/)
introduces arch_prctl(ARCH_GET_MAX_TAG_BITS), which (unlike
ARCH_GET_UNTAG_MASK) can be used to determine if the kernel really
supports pointer tagging. arch_prctl(ARCH_GET_UNTAG_MASK) will be used to
verify that HWASan can place tags in the given bit range.

Depends on D132545

Differential Revision: https://reviews.llvm.org/D132546

GitOrigin-RevId: 5d82819583b241e092b3529e4f52239f6f18afaf