1 //===-- sanitizer_getauxval.h -----------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Common getauxval() guards and definitions.
11 // getauxval() is not defined until glibc version 2.16, or until API level 21
14 //===----------------------------------------------------------------------===//
16 #ifndef SANITIZER_GETAUXVAL_H
17 #define SANITIZER_GETAUXVAL_H
19 #include "sanitizer_platform.h"
23 # include <features.h>
25 # ifndef __GLIBC_PREREQ
26 # define __GLIBC_PREREQ(x, y) 0
29 # if __GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21)
30 # define SANITIZER_USE_GETAUXVAL 1
32 # define SANITIZER_USE_GETAUXVAL 0
35 # if SANITIZER_USE_GETAUXVAL
36 # include <sys/auxv.h>
38 // The weak getauxval definition allows to check for the function at runtime.
39 // This is useful for Android, when compiled at a lower API level yet running
40 // on a more recent platform that offers the function.
41 extern "C" SANITIZER_WEAK_ATTRIBUTE
42 unsigned long getauxval(unsigned long type); // NOLINT
45 #endif // SANITIZER_LINUX
47 #endif // SANITIZER_GETAUXVAL_H