1//===-- xray_x86_64.inc -----------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of XRay, a dynamic runtime instrumentation system.
10//
11//===----------------------------------------------------------------------===//
12
13#include <cstdint>
14#include <x86intrin.h>
15
16#include "sanitizer_common/sanitizer_internal_defs.h"
17#include "xray_defs.h"
18
19namespace __xray {
20
21ALWAYS_INLINE uint64_t readTSC(uint8_t &CPU) XRAY_NEVER_INSTRUMENT {
22  unsigned LongCPU;
23  unsigned long Rax, Rdx;
24  __asm__ __volatile__("rdtscp\n" : "=a"(Rax), "=d"(Rdx), "=c"(LongCPU) ::);
25  CPU = LongCPU;
26  return (Rdx << 32) + Rax;
27}
28
29uint64_t getTSCFrequency();
30
31bool probeRequiredCPUFeatures();
32
33} // namespace __xray
34