mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-12-27 21:21:50 +03:00
9d4dfc1061
Apple Clang 14.0.3 (Xcode 14.3) miscompiles this builtin on AArch64, causing the borrow flag to be set incorrectly. I have added a detailed writeup on Qemu's issue tracker, where the same issue led to a hang when emulating x86: https://gitlab.com/qemu-project/qemu/-/issues/1659#note_1408275831 I don't know of any specific issue caused by this on Lagom, but better safe than sorry.
220 lines
5.4 KiB
C
220 lines
5.4 KiB
C
/*
|
|
* Copyright (c) 2018-2022, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2022, Nico Weber <thakis@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#ifndef USING_AK_GLOBALLY
|
|
# define USING_AK_GLOBALLY 1
|
|
#endif
|
|
|
|
#ifdef __x86_64__
|
|
# define AK_IS_ARCH_X86_64() 1
|
|
#else
|
|
# define AK_IS_ARCH_X86_64() 0
|
|
#endif
|
|
|
|
#ifdef __aarch64__
|
|
# define AK_IS_ARCH_AARCH64() 1
|
|
#else
|
|
# define AK_IS_ARCH_AARCH64() 0
|
|
#endif
|
|
|
|
#ifdef __wasm32__
|
|
# define AK_IS_ARCH_WASM32() 1
|
|
#else
|
|
# define AK_IS_ARCH_WASM32() 0
|
|
#endif
|
|
|
|
#if (defined(__SIZEOF_POINTER__) && __SIZEOF_POINTER__ == 8) || defined(_WIN64)
|
|
# define AK_ARCH_64_BIT
|
|
#else
|
|
# define AK_ARCH_32_BIT
|
|
#endif
|
|
|
|
#if defined(__clang__) || defined(__CLION_IDE__) || defined(__CLION_IDE_)
|
|
# define AK_COMPILER_CLANG
|
|
#elif defined(__GNUC__)
|
|
# define AK_COMPILER_GCC
|
|
#endif
|
|
|
|
#if defined(__serenity__)
|
|
# define AK_OS_SERENITY
|
|
#endif
|
|
|
|
#if defined(__linux__)
|
|
# define AK_OS_LINUX
|
|
#endif
|
|
|
|
#if defined(__APPLE__) && defined(__MACH__)
|
|
# define AK_OS_MACOS
|
|
# define AK_OS_BSD_GENERIC
|
|
#endif
|
|
|
|
#if defined(__FreeBSD__)
|
|
# define AK_OS_BSD_GENERIC
|
|
# define AK_OS_FREEBSD
|
|
#endif
|
|
|
|
#if defined(__NetBSD__)
|
|
# define AK_OS_BSD_GENERIC
|
|
# define AK_OS_NETBSD
|
|
#endif
|
|
|
|
#if defined(__OpenBSD__)
|
|
# define AK_OS_BSD_GENERIC
|
|
# define AK_OS_OPENBSD
|
|
#endif
|
|
|
|
#if defined(__DragonFly__)
|
|
# define AK_OS_BSD_GENERIC
|
|
# define AK_OS_DRAGONFLY
|
|
#endif
|
|
|
|
#if defined(__sun)
|
|
# define AK_OS_BSD_GENERIC
|
|
# define AK_OS_SOLARIS
|
|
#endif
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
# define AK_OS_WINDOWS
|
|
#endif
|
|
|
|
#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
|
|
|
|
#if defined(__EMSCRIPTEN__)
|
|
# define AK_OS_EMSCRIPTEN
|
|
#endif
|
|
|
|
#define ARCH(arch) (AK_IS_ARCH_##arch())
|
|
|
|
#if 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 ARCH(AARCH64)
|
|
# define VALIDATE_IS_AARCH64()
|
|
#else
|
|
# define VALIDATE_IS_AARCH64() static_assert(false, "Trying to include aarch64 only header on non aarch64 platform");
|
|
#endif
|
|
|
|
#if !defined(AK_COMPILER_CLANG)
|
|
# define AK_HAS_CONDITIONALLY_TRIVIAL
|
|
#endif
|
|
|
|
// Apple Clang 14.0.3 (shipped in Xcode 14.3) has a bug that causes __builtin_subc{,l,ll}
|
|
// to incorrectly return whether a borrow occurred on AArch64. See our writeup for the Qemu
|
|
// issue also caused by it: https://gitlab.com/qemu-project/qemu/-/issues/1659#note_1408275831
|
|
#if ARCH(AARCH64) && defined(__apple_build_version__) && __clang_major__ == 14
|
|
# define AK_BUILTIN_SUBC_BROKEN
|
|
#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
|
|
#if !ARCH(AARCH64) || defined(AK_COMPILER_CLANG)
|
|
# define NAKED __attribute__((naked))
|
|
#else
|
|
// GCC doesn't support __attribute__((naked)) on AArch64. We use NAKED to mark functions
|
|
// that are entirely written in inline assembly; having these be inlined would cause
|
|
// various problems, such as explicit `ret` instructions accidentally exiting the caller
|
|
// function or GCC discarding function arguments as they appear "dead".
|
|
# define NAKED NEVER_INLINE
|
|
#endif
|
|
|
|
#ifdef DISALLOW
|
|
# undef DISALLOW
|
|
#endif
|
|
#if defined(AK_COMPILER_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 AK_OS_SERENITY
|
|
# ifdef AK_OS_WINDOWS
|
|
// FIXME: No idea where to get this, but it's 4096 anyway :^)
|
|
# define PAGE_SIZE 4096
|
|
# else
|
|
# include <unistd.h>
|
|
# undef PAGE_SIZE
|
|
# define PAGE_SIZE sysconf(_SC_PAGESIZE)
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(AK_OS_WINDOWS)
|
|
# define CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC
|
|
#endif
|
|
|
|
#if defined(AK_OS_BSD_GENERIC) && !defined(AK_OS_FREEBSD)
|
|
# 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)
|