llvm-project/compiler-rt/lib/safestack/safestack_platform.h

//===-- safestack_platform.h ----------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements platform specific parts of SafeStack runtime.
//
//===----------------------------------------------------------------------===//

#ifndef SAFESTACK_PLATFORM_H
#define SAFESTACK_PLATFORM_H

#include "sanitizer_common/sanitizer_platform.h"

#include <stdint.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#if SANITIZER_NETBSD
#include <lwp.h>
#endif

#if SANITIZER_FREEBSD
#include <sys/thr.h>
#endif

namespace safestack {

using ThreadId = uint64_t;

inline ThreadId GetTid() {
#if SANITIZER_NETBSD
  return _lwp_self();
#elif SANITIZER_FREEBSD
  long Tid;
  thr_self(&Tid);
  return Tid;
#elif SANITIZER_OPENBSD
  return syscall(SYS_getthrid);
#elif SANITIZER_SOLARIS
  return thr_self();
#else
  return syscall(SYS_gettid);
#endif
}

inline int TgKill(pid_t pid, ThreadId tid, int sig) {
#if SANITIZER_NETBSD
  (void)pid;
  return _lwp_kill(tid, sig);
#elif SANITIZER_LINUX
  return syscall(SYS_tgkill, pid, tid, sig);
#elif SANITIZER_FREEBSD
  return syscall(SYS_thr_kill2, pid, tid, sig);
#elif SANITIZER_OPENBSD
  (void)pid;
  return syscall(SYSCALL(thrkill), tid, sig, nullptr);
#elif SANITIZER_SOLARIS
  (void)pid;
  return thr_kill(tid, sig);
#endif
}

}  // namespace safestack

#endif  // SAFESTACK_PLATFORM_H