[PATCH] D152661: [XRay] Make xray_fn_idx entries PC-relative

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: dberris, ianlevesque, ilammy.
Herald added subscribers: Enna1, pengfei, atanasyan, hiraditya, kristof.beyls, arichardson, nemanjai, sdardis.
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MaskRay requested review of this revision.
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Herald added subscribers: llvm-commits, Sanitizers.

As mentioned by commit c5d38924dc6688c15b3fa133abeb3626e8f0767c <https://reviews.llvm.org/rGc5d38924dc6688c15b3fa133abeb3626e8f0767c> (Apr 2020),
PC-relative entries avoid dynamic relocations.

This is similar to D78082 <https://reviews.llvm.org/D78082> and D78590 <https://reviews.llvm.org/D78590>. We cannot commit to support
compiler/runtime built at different versions, so just don't play with versions.

I'll fix test/CodeGen/{ARM,Hexagon,Mips} tests if this change looks good.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152661

Files:
  compiler-rt/lib/xray/xray_interface.cpp
  compiler-rt/lib/xray/xray_interface_internal.h
  llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
  llvm/test/CodeGen/AArch64/xray-attribute-instrumentation.ll
  llvm/test/CodeGen/AArch64/xray-tail-call-sled.ll
  llvm/test/CodeGen/PowerPC/xray-attribute-instrumentation.ll
  llvm/test/CodeGen/PowerPC/xray-tail-call-sled.ll
  llvm/test/CodeGen/X86/xray-attribute-instrumentation.ll
  llvm/test/CodeGen/X86/xray-log-args.ll
  llvm/test/CodeGen/X86/xray-partial-instrumentation-skip-entry.ll
  llvm/test/CodeGen/X86/xray-tail-call-sled.ll

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