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