mirror of
https://github.com/SerenityOS/serenity
synced 2024-07-05 20:30:07 +00:00
2b69af2dfe
JS::Value stores 48 bit pointers to separately allocated objects in its payload. On x86-64, canonical addresses have their top 16 bits set to the same value as bit 47, effectively meaning that the value has to be sign-extended to get the pointer. AArch64, however, expects the topmost bits to be all zeros. This commit gates sign extension behind `#if ARCH(X86_64)`, and adds an `#error` for unsupported architectures, so that we do not forget to think about pointer handling when porting to a new architecture. Fixes #15290 Fixes SerenityOS/ladybird#56
147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#ifdef __i386__
|
|
# define AK_ARCH_I386 1
|
|
#endif
|
|
|
|
#ifdef __x86_64__
|
|
# define AK_ARCH_X86_64 1
|
|
#endif
|
|
|
|
#ifdef __aarch64__
|
|
# define AK_ARCH_AARCH64 1
|
|
#endif
|
|
|
|
#if (defined(__SIZEOF_POINTER__) && __SIZEOF_POINTER__ == 8) || defined(_WIN64)
|
|
# define AK_ARCH_64_BIT
|
|
#else
|
|
# define AK_ARCH_32_BIT
|
|
#endif
|
|
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
# define AK_OS_MACOS
|
|
# define AK_OS_BSD_GENERIC
|
|
#endif
|
|
|
|
#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
|
|
# define AK_OS_BSD_GENERIC
|
|
#endif
|
|
|
|
// FIXME: Remove clang-format suppression after https://github.com/llvm/llvm-project/issues/56602 resolved
|
|
// clang-format off
|
|
#if defined(__ANDROID__)
|
|
# define STR(x) __STR(x)
|
|
# define __STR(x) #x
|
|
# if __ANDROID_API__ < 30
|
|
# pragma message "Invalid android API " STR(__ANDROID_API__)
|
|
# error "Build configuration not tested on configured Android API version"
|
|
# endif
|
|
# undef STR
|
|
# undef __STR
|
|
# define AK_OS_ANDROID
|
|
#endif
|
|
// clang-format on
|
|
|
|
#define ARCH(arch) (defined(AK_ARCH_##arch) && AK_ARCH_##arch)
|
|
|
|
#if ARCH(I386) || ARCH(X86_64)
|
|
# define VALIDATE_IS_X86()
|
|
#else
|
|
# define VALIDATE_IS_X86() static_assert(false, "Trying to include x86 only header on non x86 platform");
|
|
#endif
|
|
|
|
#if !defined(__clang__) && !defined(__CLION_IDE_) && !defined(__CLION_IDE__)
|
|
# define AK_HAS_CONDITIONALLY_TRIVIAL
|
|
#endif
|
|
|
|
#ifdef ALWAYS_INLINE
|
|
# undef ALWAYS_INLINE
|
|
#endif
|
|
#define ALWAYS_INLINE __attribute__((always_inline)) inline
|
|
|
|
#ifdef NEVER_INLINE
|
|
# undef NEVER_INLINE
|
|
#endif
|
|
#define NEVER_INLINE __attribute__((noinline))
|
|
|
|
#ifdef FLATTEN
|
|
# undef FLATTEN
|
|
#endif
|
|
#define FLATTEN __attribute__((flatten))
|
|
|
|
#ifdef RETURNS_NONNULL
|
|
# undef RETURNS_NONNULL
|
|
#endif
|
|
#define RETURNS_NONNULL __attribute__((returns_nonnull))
|
|
|
|
#ifdef NO_SANITIZE_ADDRESS
|
|
# undef NO_SANITIZE_ADDRESS
|
|
#endif
|
|
#define NO_SANITIZE_ADDRESS __attribute__((no_sanitize_address))
|
|
|
|
#ifdef NAKED
|
|
# undef NAKED
|
|
#endif
|
|
#define NAKED __attribute__((naked))
|
|
|
|
#ifdef DISALLOW
|
|
# undef DISALLOW
|
|
#endif
|
|
#ifdef __clang__
|
|
# define DISALLOW(message) __attribute__((diagnose_if(1, message, "error")))
|
|
#else
|
|
# define DISALLOW(message) __attribute__((error(message)))
|
|
#endif
|
|
|
|
// GCC doesn't have __has_feature but clang does
|
|
#ifndef __has_feature
|
|
# define __has_feature(...) 0
|
|
#endif
|
|
|
|
#if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
|
|
# define HAS_ADDRESS_SANITIZER
|
|
# define ASAN_POISON_MEMORY_REGION(addr, size) __asan_poison_memory_region(addr, size)
|
|
# define ASAN_UNPOISON_MEMORY_REGION(addr, size) __asan_unpoison_memory_region(addr, size)
|
|
#else
|
|
# define ASAN_POISON_MEMORY_REGION(addr, size)
|
|
# define ASAN_UNPOISON_MEMORY_REGION(addr, size)
|
|
#endif
|
|
|
|
#ifndef __serenity__
|
|
// On macOS (at least Mojave), Apple's version of this header is not wrapped
|
|
// in extern "C".
|
|
# ifdef AK_OS_MACOS
|
|
extern "C" {
|
|
# endif
|
|
# include <unistd.h>
|
|
# undef PAGE_SIZE
|
|
# define PAGE_SIZE sysconf(_SC_PAGESIZE)
|
|
# ifdef AK_OS_MACOS
|
|
};
|
|
# endif
|
|
#endif
|
|
|
|
#ifdef AK_OS_BSD_GENERIC
|
|
# define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
|
|
# define CLOCK_REALTIME_COARSE CLOCK_REALTIME
|
|
#endif
|
|
|
|
#ifndef AK_SYSTEM_CACHE_ALIGNMENT_SIZE
|
|
# if ARCH(AARCH64) || ARCH(x86_64)
|
|
# define AK_SYSTEM_CACHE_ALIGNMENT_SIZE 64
|
|
# else
|
|
# define AK_SYSTEM_CACHE_ALIGNMENT_SIZE 128
|
|
# endif
|
|
#endif /* AK_SYSTEM_CACHE_ALIGNMENT_SIZE */
|
|
|
|
#ifdef AK_CACHE_ALIGNED
|
|
# undef AK_CACHE_ALIGNED
|
|
#endif
|
|
#define AK_CACHE_ALIGNED alignas(AK_SYSTEM_CACHE_ALIGNMENT_SIZE)
|