libsanitizer/sanitizer_common/sanitizer_errno.h

   1 //===-- sanitizer_errno.h ---------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is shared between sanitizers run-time libraries.
  10 //
  11 // Defines errno to avoid including errno.h and its dependencies into sensitive
  12 // files (e.g. interceptors are not supposed to include any system headers).
  13 // It's ok to use errno.h directly when your file already depend on other system
  14 // includes though.
  15 //
  16 //===----------------------------------------------------------------------===//
  17
  18 #ifndef SANITIZER_ERRNO_H
  19 #define SANITIZER_ERRNO_H
  20
  21 #include "sanitizer_errno_codes.h"
  22 #include "sanitizer_platform.h"
  23
  24 #if SANITIZER_FREEBSD || SANITIZER_APPLE
  25 #  define __errno_location __error
  26 #elif SANITIZER_ANDROID || SANITIZER_NETBSD
  27 #  define __errno_location __errno
  28 #elif SANITIZER_SOLARIS
  29 #  define __errno_location ___errno
  30 #elif SANITIZER_WINDOWS
  31 #  define __errno_location _errno
  32 #endif
  33
  34 extern "C" int *__errno_location();
  35
  36 #define errno (*__errno_location())
  37
  38 #endif  // SANITIZER_ERRNO_H