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//===-- 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
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