Revert r276117 "[XRay] Basic initialization and flag definition for XRay runtime"

and also the follow-up "[xray] Only build xray on Linux for now"

Two build errors were reported on the llvm-commits list:

	[ 88%] Building CXX object lib/xray/CMakeFiles/clang_rt.xray-x86_64.dir/xray_flags.cc.o
	/mnt/b/sanitizer-buildbot1/sanitizer-x86_64-linux/build/llvm/projects/compiler-rt/lib/xray/xray_init.cc:23:10: fatal error: 'llvm/Support/ELF.h' file not found
  #include "llvm/Support/ELF.h"
					 ^

and

	In file included from /w/src/llvm.org/projects/compiler-rt/lib/xray/xray_interface.cc:16:
	/w/src/llvm.org/projects/compiler-rt/lib/xray/xray_interface_internal.h:36:8: error:
				no type named 'size_t' in namespace 'std'
		std::size_t Entries;
		~~~~~^

llvm-svn: 276186

1 files changed, 0 insertions, 66 deletions

diff --git a/compiler-rt/include/xray/xray_interface.h b/compiler-rt/include/xray/xray_interface.h
deleted file mode 100644
index b8a0a61920b..00000000000
--- a/compiler-rt/include/xray/xray_interface.h
+++ /dev/null
@@ -1,66 +0,0 @@
-//===-- xray_interface.h ----------------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file is a part of XRay, a dynamic runtime instrumentation system.
-//
-// APIs for controlling XRay functionality explicitly.
-//===----------------------------------------------------------------------===//
-#ifndef XRAY_XRAY_INTERFACE_H
-#define XRAY_XRAY_INTERFACE_H
-
-#include <cstdint>
-
-extern "C" {
-
-enum XRayEntryType { ENTRY = 0, EXIT = 1 };
-
-// Provide a function to invoke for when instrumentation points are hit. This is
-// a user-visible control surface that overrides the default implementation. The
-// function provided should take the following arguments:
-//
-//   - function id: an identifier that indicates the id of a function; this id
-//                  is generated by xray; the mapping between the function id
-//                  and the actual function pointer is available through
-//                  __xray_table.
-//   - entry type: identifies what kind of instrumentation point was encountered
-//                 (function entry, function exit, etc.). See the enum
-//                 XRayEntryType for more details.
-//
-// Returns 1 on success, 0 on error.
-extern int __xray_set_handler(void (*entry)(int32_t, XRayEntryType));
-
-// This removes whatever the currently provided handler is. Returns 1 on
-// success, 0 on error.
-extern int __xray_remove_handler();
-
-enum XRayPatchingStatus {
-  NOT_INITIALIZED = 0,
-  NOTIFIED = 1,
-  ONGOING = 2,
-  FAILED = 3
-};
-
-// This tells XRay to patch the instrumentation points. This is an asynchronous
-// process, and returns the following status in specific cases:
-//
-//   - 0 : XRay is not initialized.
-//   - 1 : We've done the notification.
-//   - 2 : Patching / un-patching is on-going.
-extern XRayPatchingStatus __xray_patch();
-
-// Reverses the effect of __xray_patch(). This is an asynchronous process, and
-// returns the following status in specific cases.
-//
-//   - 0 : XRay is not initialized.
-//   - 1 : We've done the notification.
-//   - 2 : Patching / un-patching is on-going.
-extern int __xray_unpatch();
-}
-
-#endif