[PATCH] D23154: [compiler-rt][XRay] Implement __xray_unpatch()

[Dean Michael Berris via llvm-commits]

dberris created this revision.
dberris added reviewers: rSerge, echristo, rnk.
dberris added a subscriber: llvm-commits.
dberris added a dependency: D23101: [XRay] Align entry and return sleds to 2 byte boundaries.
Herald added subscribers: mehdi_amini, srhines, danalbert, tberghammer.

We also add one test (and the XRay testing infrastructure) to exercise
the patching and unpatching code. This uses the XRay API exported
through the headers as well, installing a custom log handler.

Depends on D23101 for the updated emitted code alignment for the
return/entry sleds.

https://reviews.llvm.org/D23154

Files:
  lib/xray/xray_interface.cc
  test/CMakeLists.txt
  test/xray/CMakeLists.txt
  test/xray/TestCases/Linux/patching-unpatching.cc
  test/xray/lit.cfg
  test/xray/lit.site.cfg.in

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