[all-commits] [llvm/llvm-project] 4b9bef: [xray] Preserve x8 in trampoline on AArch64

[Ian Levesque via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4b9bef7e6cae4212ab7325ab3165ce01be4344bc
      https://github.com/llvm/llvm-project/commit/4b9bef7e6cae4212ab7325ab3165ce01be4344bc
  Author: Ian Levesque <ianlevesque at fb.com>
  Date:   2020-04-27 (Mon, 27 Apr 2020)

  Changed paths:
    M compiler-rt/lib/xray/xray_trampoline_AArch64.S

  Log Message:
  -----------
  [xray] Preserve x8 in trampoline on AArch64

Summary: Fixes an ABI violation in the trampoline code for AArch64 that causes the indirect result register to get overwritten if the XRay handler function is complex enough to use it.

Reviewers: MaskRay, dberris, johnislarry

Subscribers: kristof.beyls, danielkiss, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D78596