libsanitizer/sanitizer_common/sanitizer_errno.h

   1 //===-- sanitizer_errno.h ---------------------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is shared between sanitizers run-time libraries.
   9 //
  10 // Defines errno to avoid including errno.h and its dependencies into sensitive
  11 // files (e.g. interceptors are not supposed to include any system headers).
  12 // It's ok to use errno.h directly when your file already depend on other system
  13 // includes though.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #ifndef SANITIZER_ERRNO_H
  18 #define SANITIZER_ERRNO_H
  19
  20 #include "sanitizer_errno_codes.h"
  21 #include "sanitizer_platform.h"
  22
  23 #if SANITIZER_FREEBSD || SANITIZER_MAC
  24 #  define __errno_location __error
  25 #elif SANITIZER_ANDROID || SANITIZER_NETBSD || SANITIZER_OPENBSD || \
  26   SANITIZER_RTEMS
  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