1 //===-- sanitizer_platform.h ------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Common platform macros. 11 //===----------------------------------------------------------------------===// 12 13 #ifndef SANITIZER_PLATFORM_H 14 #define SANITIZER_PLATFORM_H 15 16 #if !defined(__linux__) && !defined(__FreeBSD__) && \ 17 !defined(__APPLE__) && !defined(_WIN32) 18 # error "This operating system is not supported" 19 #endif 20 21 #if defined(__linux__) 22 # define SANITIZER_LINUX 1 23 #else 24 # define SANITIZER_LINUX 0 25 #endif 26 27 #if defined(__FreeBSD__) 28 # define SANITIZER_FREEBSD 1 29 #else 30 # define SANITIZER_FREEBSD 0 31 #endif 32 33 #if defined(__APPLE__) 34 # define SANITIZER_MAC 1 35 # include <TargetConditionals.h> 36 # if TARGET_OS_IPHONE 37 # define SANITIZER_IOS 1 38 # else 39 # define SANITIZER_IOS 0 40 # endif 41 #else 42 # define SANITIZER_MAC 0 43 # define SANITIZER_IOS 0 44 #endif 45 46 #if defined(_WIN32) 47 # define SANITIZER_WINDOWS 1 48 #else 49 # define SANITIZER_WINDOWS 0 50 #endif 51 52 #if defined(__ANDROID__) || defined(ANDROID) 53 # define SANITIZER_ANDROID 1 54 #else 55 # define SANITIZER_ANDROID 0 56 #endif 57 58 #define SANITIZER_POSIX (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC) 59 60 #if __LP64__ || defined(_WIN64) 61 # define SANITIZER_WORDSIZE 64 62 #else 63 # define SANITIZER_WORDSIZE 32 64 #endif 65 66 #if SANITIZER_WORDSIZE == 64 67 # define FIRST_32_SECOND_64(a, b) (b) 68 #else 69 # define FIRST_32_SECOND_64(a, b) (a) 70 #endif 71 72 #if defined(__x86_64__) && !defined(_LP64) 73 # define SANITIZER_X32 1 74 #else 75 # define SANITIZER_X32 0 76 #endif 77 78 // By default we allow to use SizeClassAllocator64 on 64-bit platform. 79 // But in some cases (e.g. AArch64's 39-bit address space) SizeClassAllocator64 80 // does not work well and we need to fallback to SizeClassAllocator32. 81 // For such platforms build this code with -DSANITIZER_CAN_USE_ALLOCATOR64=0 or 82 // change the definition of SANITIZER_CAN_USE_ALLOCATOR64 here. 83 #ifndef SANITIZER_CAN_USE_ALLOCATOR64 84 # if defined(__aarch64__) 85 # define SANITIZER_CAN_USE_ALLOCATOR64 0 86 # else 87 # define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64) 88 # endif 89 #endif 90 91 // The range of addresses which can be returned my mmap. 92 // FIXME: this value should be different on different platforms, 93 // e.g. on AArch64 it is most likely (1ULL << 39). Larger values will still work 94 // but will consume more memory for TwoLevelByteMap. 95 #if defined(__aarch64__) 96 # define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 39) 97 #else 98 # define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47) 99 #endif 100 101 // The AArch64 linux port uses the canonical syscall set as mandated by 102 // the upstream linux community for all new ports. Other ports may still 103 // use legacy syscalls. 104 #ifndef SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 105 # if defined(__aarch64__) && SANITIZER_LINUX 106 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 1 107 # else 108 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 0 109 # endif 110 #endif 111 112 #endif // SANITIZER_PLATFORM_H 113
