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      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
     39