compiler-rt/lib/profile/InstrProfilingRuntime.cc

//===- InstrProfilingRuntime.cpp - PGO runtime initialization -------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

extern "C" {

#include "InstrProfiling.h"

/* int __llvm_profile_runtime  */
COMPILER_RT_VISIBILITY int INSTR_PROF_PROFILE_RUNTIME_VAR;
}

namespace {

class RegisterRuntime {
public:
  RegisterRuntime() {
    __llvm_profile_register_write_file_atexit();
    __llvm_profile_initialize_file();
  }
};

RegisterRuntime Registration;

}