[all-commits] [llvm/llvm-project] ba04c7: [scudo] Always exclude Tag 0

[Vitaly Buka via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ba04c7c128b1214edf8888b129f9e841852a629b
      https://github.com/llvm/llvm-project/commit/ba04c7c128b1214edf8888b129f9e841852a629b
  Author: Vitaly Buka <vitalybuka at google.com>
  Date:   2021-06-04 (Fri, 04 Jun 2021)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/memtag.h

  Log Message:
  -----------
  [scudo] Always exclude Tag 0

prepareTaggedChunk uses Tag 0 for header.

Android already PR_MTE_TAG_MASK to 0xfffe,
but with the patch we will not need to deppend
on the system configuration.

Reviewed By: pcc

Differential Revision: https://reviews.llvm.org/D103134