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//===-- sanitizer_platform.h ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Common platform macros.
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_PLATFORM_H
#define SANITIZER_PLATFORM_H
#if !defined(__linux__) && !defined(__APPLE__) && !defined(_WIN32)
# error "This operating system is not supported"
#endif
#if defined(__linux__)
# define SANITIZER_LINUX 1
#else
# define SANITIZER_LINUX 0
#endif
#if defined(__APPLE__)
# define SANITIZER_MAC 1
# include <TargetConditionals.h>
# if TARGET_OS_IPHONE
# define SANITIZER_IOS 1
# else
# define SANITIZER_IOS 0
# endif
#else
# define SANITIZER_MAC 0
# define SANITIZER_IOS 0
#endif
#if defined(_WIN32)
# define SANITIZER_WINDOWS 1
#else
# define SANITIZER_WINDOWS 0
#endif
#if defined(__ANDROID__) || defined(ANDROID)
# define SANITIZER_ANDROID 1
#else
# define SANITIZER_ANDROID 0
#endif
#define SANITIZER_POSIX (SANITIZER_LINUX || SANITIZER_MAC)
#if __LP64__ || defined(_WIN64)
# define SANITIZER_WORDSIZE 64
#else
# define SANITIZER_WORDSIZE 32
#endif
#if SANITIZER_WORDSIZE == 64
# define FIRST_32_SECOND_64(a, b) (b)
#else
# define FIRST_32_SECOND_64(a, b) (a)
#endif
// By default we allow to use SizeClassAllocator64 on 64-bit platform.
// But in some cases (e.g. AArch64's 39-bit address space) SizeClassAllocator64
// does not work well and we need to fallback to SizeClassAllocator32.
// For such platforms build this code with -DSANITIZER_CAN_USE_ALLOCATOR64=0 or
// change the definition of SANITIZER_CAN_USE_ALLOCATOR64 here.
#ifndef SANITIZER_CAN_USE_ALLOCATOR64
# if defined(__aarch64__)
# define SANITIZER_CAN_USE_ALLOCATOR64 0
# else
# define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64)
# endif
#endif
// The range of addresses which can be returned my mmap.
// FIXME: this value should be different on different platforms,
// e.g. on AArch64 it is most likely (1ULL << 39). Larger values will still work
// but will consume more memory for TwoLevelByteMap.
#if defined(__aarch64__)
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 39)
#else
# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
#endif
// The AArch64 linux port uses the canonical syscall set as mandated by
// the upstream linux community for all new ports. Other ports may still
// use legacy syscalls.
#ifndef SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
# ifdef __aarch64__
# define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 1
# else
# define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 0
# endif
#endif
#endif // SANITIZER_PLATFORM_H
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