1 //===-- platform.h ----------------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef SCUDO_PLATFORM_H_ 10 #define SCUDO_PLATFORM_H_ 11 12 // Transitive includes of stdint.h specify some of the defines checked below. 13 #include <stdint.h> 14 15 #if defined(__linux__) 16 #define SCUDO_LINUX 1 17 #else 18 #define SCUDO_LINUX 0 19 #endif 20 21 // See https://android.googlesource.com/platform/bionic/+/master/docs/defines.md 22 #if defined(__BIONIC__) 23 #define SCUDO_ANDROID 1 24 #else 25 #define SCUDO_ANDROID 0 26 #endif 27 28 #if defined(__Fuchsia__) 29 #define SCUDO_FUCHSIA 1 30 #else 31 #define SCUDO_FUCHSIA 0 32 #endif 33 34 #if __LP64__ 35 #define SCUDO_WORDSIZE 64U 36 #else 37 #define SCUDO_WORDSIZE 32U 38 #endif 39 40 #if SCUDO_WORDSIZE == 64U 41 #define FIRST_32_SECOND_64(a, b) (b) 42 #else 43 #define FIRST_32_SECOND_64(a, b) (a) 44 #endif 45 46 #ifndef SCUDO_CAN_USE_PRIMARY64 47 #define SCUDO_CAN_USE_PRIMARY64 (SCUDO_WORDSIZE == 64U) 48 #endif 49 50 #ifndef SCUDO_MIN_ALIGNMENT_LOG 51 // We force malloc-type functions to be aligned to std::max_align_t, but there 52 // is no reason why the minimum alignment for all other functions can't be 8 53 // bytes. Except obviously for applications making incorrect assumptions. 54 // TODO(kostyak): define SCUDO_MIN_ALIGNMENT_LOG 3 55 #define SCUDO_MIN_ALIGNMENT_LOG FIRST_32_SECOND_64(3, 4) 56 #endif 57 58 #if defined(__aarch64__) 59 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48) 60 #else 61 #define SCUDO_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47) 62 #endif 63 64 // Older gcc have issues aligning to a constexpr, and require an integer. 65 // See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56859 among others. 66 #if defined(__powerpc__) || defined(__powerpc64__) 67 #define SCUDO_CACHE_LINE_SIZE 128 68 #else 69 #define SCUDO_CACHE_LINE_SIZE 64 70 #endif 71 72 #define SCUDO_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12) 73 74 #endif // SCUDO_PLATFORM_H_ 75