| //===-- 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 |
