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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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//===-- sanitizer_getauxval.h -----------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Common getauxval() guards and definitions.
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// getauxval() is not defined until glibc version 2.16, or until API level 21
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// for Android.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_GETAUXVAL_H
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#define SANITIZER_GETAUXVAL_H
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#include "sanitizer_platform.h"
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#if SANITIZER_LINUX || SANITIZER_FUCHSIA
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# include <features.h>
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# ifndef __GLIBC_PREREQ
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# define __GLIBC_PREREQ(x, y) 0
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# endif
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# if __GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21) || \
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SANITIZER_FUCHSIA
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# define SANITIZER_USE_GETAUXVAL 1
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# else
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# define SANITIZER_USE_GETAUXVAL 0
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# endif
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# if SANITIZER_USE_GETAUXVAL
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# include <sys/auxv.h>
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# else
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// The weak getauxval definition allows to check for the function at runtime.
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// This is useful for Android, when compiled at a lower API level yet running
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// on a more recent platform that offers the function.
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extern "C" SANITIZER_WEAK_ATTRIBUTE
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unsigned long getauxval(unsigned long type); // NOLINT
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# endif
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#endif // SANITIZER_LINUX || SANITIZER_FUCHSIA
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#endif // SANITIZER_GETAUXVAL_H
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