tree 1d50233d892ea15bb6365087fed3e1758f576472
parent f645f9194eefff5be5fb570c4c6586159e64b5ce
author Dean Michael Berris <dberris@google.com> 1469024090 +0000
committer Copybara-Service <copybara-worker@google.com> 1598747228 -0700

[compiler-rt] [XRay] Basic initialization and flag definition for XRay runtime

Summary:
This patch implements the initialisation and patching routines for the XRay runtime, along with the necessary trampolines for function entry/exit handling. For now we only define the basic hooks for allowing an implementation to define a handler that gets run on function entry/exit. We expose a minimal API for controlling the behaviour of the runtime (patching, cleanup, and setting the handler to invoke when instrumenting).

Depends on D19904

Reviewers: echristo, kcc, rnk

Subscribers: rnk, mehdi_amini, llvm-commits

Differential Revision: https://reviews.llvm.org/D21612

llvm-svn: 276117
GitOrigin-RevId: e1c81d10d7710dba89ddda236f566dbcb74fa799