forked from OSchip/llvm-project
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
//===-- xray_emulate_tsc.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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#ifndef XRAY_EMULATE_TSC_H
|
|
#define XRAY_EMULATE_TSC_H
|
|
|
|
#include "sanitizer_common/sanitizer_common.h"
|
|
#include "sanitizer_common/sanitizer_internal_defs.h"
|
|
#include "xray_defs.h"
|
|
#include <cerrno>
|
|
#include <cstdint>
|
|
#include <time.h>
|
|
|
|
namespace __xray {
|
|
|
|
static constexpr uint64_t NanosecondsPerSecond = 1000ULL * 1000 * 1000;
|
|
|
|
ALWAYS_INLINE uint64_t readTSC(uint8_t &CPU) XRAY_NEVER_INSTRUMENT {
|
|
timespec TS;
|
|
int result = clock_gettime(CLOCK_REALTIME, &TS);
|
|
if (result != 0) {
|
|
Report("clock_gettime(2) returned %d, errno=%d.", result, int(errno));
|
|
TS.tv_sec = 0;
|
|
TS.tv_nsec = 0;
|
|
}
|
|
CPU = 0;
|
|
return TS.tv_sec * NanosecondsPerSecond + TS.tv_nsec;
|
|
}
|
|
}
|
|
|
|
#endif // XRAY_EMULATE_TSC_H
|