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