1//===-- sanitizer_platform.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// Common platform macros. 9//===----------------------------------------------------------------------===// 10 11#ifndef SANITIZER_PLATFORM_H 12#define SANITIZER_PLATFORM_H 13 14#if !defined(__linux__) && !defined(__FreeBSD__) && \ 15 !defined(__APPLE__) && !defined(_WIN32) 16# error "This operating system is not supported" 17#endif 18 19#if defined(__linux__) 20# define SANITIZER_LINUX 1 21#else 22# define SANITIZER_LINUX 0 23#endif 24 25#if defined(__FreeBSD__) 26# define SANITIZER_FREEBSD 1 27#else 28# define SANITIZER_FREEBSD 0 29#endif 30 31#if defined(__APPLE__) 32# define SANITIZER_MAC 1 33# include <TargetConditionals.h> 34# if TARGET_OS_IPHONE 35# define SANITIZER_IOS 1 36# else 37# define SANITIZER_IOS 0 38# endif 39#else 40# define SANITIZER_MAC 0 41# define SANITIZER_IOS 0 42#endif 43 44#if defined(_WIN32) 45# define SANITIZER_WINDOWS 1 46#else 47# define SANITIZER_WINDOWS 0 48#endif 49 50#if defined(__ANDROID__) 51# define SANITIZER_ANDROID 1 52#else 53# define SANITIZER_ANDROID 0 54#endif 55 56#define SANITIZER_POSIX (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC) 57 58#if __LP64__ || defined(_WIN64) 59# define SANITIZER_WORDSIZE 64 60#else 61# define SANITIZER_WORDSIZE 32 62#endif 63 64#if SANITIZER_WORDSIZE == 64 65# define FIRST_32_SECOND_64(a, b) (b) 66#else 67# define FIRST_32_SECOND_64(a, b) (a) 68#endif 69 70#if defined(__x86_64__) && !defined(_LP64) 71# define SANITIZER_X32 1 72#else 73# define SANITIZER_X32 0 74#endif 75 76// By default we allow to use SizeClassAllocator64 on 64-bit platform. 77// But in some cases (e.g. AArch64's 39-bit address space) SizeClassAllocator64 78// does not work well and we need to fallback to SizeClassAllocator32. 79// For such platforms build this code with -DSANITIZER_CAN_USE_ALLOCATOR64=0 or 80// change the definition of SANITIZER_CAN_USE_ALLOCATOR64 here. 81#ifndef SANITIZER_CAN_USE_ALLOCATOR64 82# if defined(__aarch64__) || defined(__mips64) 83# define SANITIZER_CAN_USE_ALLOCATOR64 0 84# else 85# define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64) 86# endif 87#endif 88 89// The range of addresses which can be returned my mmap. 90// FIXME: this value should be different on different platforms, 91// e.g. on AArch64 it is most likely (1ULL << 39). Larger values will still work 92// but will consume more memory for TwoLevelByteMap. 93#if defined(__aarch64__) 94# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 39) 95#else 96# define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47) 97#endif 98 99// The AArch64 linux port uses the canonical syscall set as mandated by 100// the upstream linux community for all new ports. Other ports may still 101// use legacy syscalls. 102#ifndef SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 103# if defined(__aarch64__) && SANITIZER_LINUX 104# define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 1 105# else 106# define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 0 107# endif 108#endif 109 110// udi16 syscalls can only be used when the following conditions are 111// met: 112// * target is one of arm32, x86-32, sparc32, sh or m68k 113// * libc version is libc5, glibc-2.0, glibc-2.1 or glibc-2.2 to 2.15 114// built against > linux-2.2 kernel headers 115// Since we don't want to include libc headers here, we check the 116// target only. 117#if defined(__arm__) || SANITIZER_X32 || defined(__sparc__) 118#define SANITIZER_USES_UID16_SYSCALLS 1 119#else 120#define SANITIZER_USES_UID16_SYSCALLS 0 121#endif 122 123#ifdef __mips__ 124# define SANITIZER_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 10) 125#else 126# define SANITIZER_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12) 127#endif 128 129// Assume obsolete RPC headers are available by default 130#if !defined(HAVE_RPC_XDR_H) && !defined(HAVE_TIRPC_RPC_XDR_H) 131# define HAVE_RPC_XDR_H (SANITIZER_LINUX && !SANITIZER_ANDROID) 132# define HAVE_TIRPC_RPC_XDR_H 0 133#endif 134 135#endif // SANITIZER_PLATFORM_H 136