/proc/self/root/proc/self/root/proc/thread-self/root/proc/self/root/node24/include/node
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// Copyright 2013 the V8 project authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file. #ifndef V8CONFIG_H_#define V8CONFIG_H_ // gcc 10 defines __cplusplus to "an unspecified value strictly larger than// 201703L" for its experimental -std=gnu++2a config.// TODO(leszeks): Change to `__cplusplus <= 202002L` once we only support// compilers with full C++20 support.#if __cplusplus <= 201703L#error "C++20 or later required."#endif #ifdef V8_GN_HEADER#if !__has_include("v8-gn.h")#error Missing v8-gn.h. The configuration for v8 is missing from the include \path. Add it with -I<path> to the command line#endif#include "v8-gn.h" // NOLINT(build/include_directory)#endif #include <memory>// clang-format off // Platform headers for feature detection below.#if defined(__ANDROID__)# include <sys/cdefs.h>#elif defined(__APPLE__)# include <TargetConditionals.h>#elif defined(__linux__)# include <features.h>#elif defined(__MVS__)# include "zos-base.h"#endif // This macro allows to test for the version of the GNU C library (or// a compatible C library that masquerades as glibc). It evaluates to// 0 if libc is not GNU libc or compatible.// Use like:// #if V8_GLIBC_PREREQ(2, 3)// ...// #endif#if defined(__GLIBC__) && defined(__GLIBC_MINOR__)# define V8_GLIBC_PREREQ(major, minor) \ ((__GLIBC__ * 100 + __GLIBC_MINOR__) >= ((major) * 100 + (minor)))#else# define V8_GLIBC_PREREQ(major, minor) 0#endif // This macro allows to test for the version of the GNU C++ compiler.// Note that this also applies to compilers that masquerade as GCC,// for example clang and the Intel C++ compiler for Linux.// Use like:// #if V8_GNUC_PREREQ(4, 3, 1)// ...// #endif#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)# define V8_GNUC_PREREQ(major, minor, patchlevel) \ ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= \ ((major) * 10000 + (minor) * 100 + (patchlevel)))#elif defined(__GNUC__) && defined(__GNUC_MINOR__)# define V8_GNUC_PREREQ(major, minor, patchlevel) \ ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= \ ((major) * 10000 + (minor) * 100 + (patchlevel)))#else# define V8_GNUC_PREREQ(major, minor, patchlevel) 0#endif // -----------------------------------------------------------------------------// Operating system detection (host)//// V8_OS_ANDROID - Android// V8_OS_BSD - BSDish (macOS, Net/Free/Open/DragonFlyBSD)// V8_OS_CYGWIN - Cygwin// V8_OS_DRAGONFLYBSD - DragonFlyBSD// V8_OS_FREEBSD - FreeBSD// V8_OS_FUCHSIA - Fuchsia// V8_OS_LINUX - Linux (Android, ChromeOS, Linux, ...)// V8_OS_DARWIN - Darwin (macOS, iOS)// V8_OS_MACOS - macOS// V8_OS_IOS - iOS// V8_OS_NETBSD - NetBSD// V8_OS_OPENBSD - OpenBSD// V8_OS_POSIX - POSIX compatible (mostly everything except Windows)// V8_OS_QNX - QNX Neutrino// V8_OS_SOLARIS - Sun Solaris and OpenSolaris// V8_OS_STARBOARD - Starboard (platform abstraction for Cobalt)// V8_OS_AIX - AIX// V8_OS_WIN - Microsoft Windows// V8_OS_ZOS - z/OS #if defined(__ANDROID__)# define V8_OS_ANDROID 1# define V8_OS_LINUX 1# define V8_OS_POSIX 1# define V8_OS_STRING "android" #elif defined(__APPLE__)# define V8_OS_POSIX 1# define V8_OS_BSD 1# define V8_OS_DARWIN 1# if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE# define V8_OS_IOS 1# define V8_OS_STRING "ios"# else# define V8_OS_MACOS 1# define V8_OS_STRING "macos"# endif // defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE #elif defined(__CYGWIN__)# define V8_OS_CYGWIN 1# define V8_OS_POSIX 1# define V8_OS_STRING "cygwin" #elif defined(__linux__)# define V8_OS_LINUX 1# define V8_OS_POSIX 1# define V8_OS_STRING "linux" #elif defined(__sun)# define V8_OS_POSIX 1# define V8_OS_SOLARIS 1# define V8_OS_STRING "sun" #elif defined(STARBOARD)# define V8_OS_STARBOARD 1# define V8_OS_STRING "starboard" #elif defined(_AIX)# define V8_OS_POSIX 1# define V8_OS_AIX 1# define V8_OS_STRING "aix" #elif defined(__FreeBSD__)# define V8_OS_BSD 1# define V8_OS_FREEBSD 1# define V8_OS_POSIX 1# define V8_OS_STRING "freebsd" #elif defined(__Fuchsia__)# define V8_OS_FUCHSIA 1# define V8_OS_POSIX 1# define V8_OS_STRING "fuchsia" #elif defined(__DragonFly__)# define V8_OS_BSD 1# define V8_OS_DRAGONFLYBSD 1# define V8_OS_POSIX 1# define V8_OS_STRING "dragonflybsd" #elif defined(__NetBSD__)# define V8_OS_BSD 1# define V8_OS_NETBSD 1# define V8_OS_POSIX 1# define V8_OS_STRING "netbsd" #elif defined(__OpenBSD__)# define V8_OS_BSD 1# define V8_OS_OPENBSD 1# define V8_OS_POSIX 1# define V8_OS_STRING "openbsd" #elif defined(__QNXNTO__)# define V8_OS_POSIX 1# define V8_OS_QNX 1# define V8_OS_STRING "qnx" #elif defined(_WIN32)# define V8_OS_WIN 1# define V8_OS_STRING "windows" #elif defined(__MVS__)# define V8_OS_POSIX 1# define V8_OS_ZOS 1# define V8_OS_STRING "zos"#endif // -----------------------------------------------------------------------------// Operating system detection (target)//// V8_TARGET_OS_ANDROID// V8_TARGET_OS_FUCHSIA// V8_TARGET_OS_IOS// V8_TARGET_OS_LINUX// V8_TARGET_OS_MACOS// V8_TARGET_OS_WIN// V8_TARGET_OS_CHROMEOS//// If not set explicitly, these fall back to corresponding V8_OS_ values. #ifdef V8_HAVE_TARGET_OS // The target OS is provided, just check that at least one known value is set.# if !defined(V8_TARGET_OS_ANDROID) \ && !defined(V8_TARGET_OS_FUCHSIA) \ && !defined(V8_TARGET_OS_IOS) \ && !defined(V8_TARGET_OS_LINUX) \ && !defined(V8_TARGET_OS_MACOS) \ && !defined(V8_TARGET_OS_WIN) \ && !defined(V8_TARGET_OS_CHROMEOS)# error No known target OS defined.# endif #else // V8_HAVE_TARGET_OS # if defined(V8_TARGET_OS_ANDROID) \ || defined(V8_TARGET_OS_FUCHSIA) \ || defined(V8_TARGET_OS_IOS) \ || defined(V8_TARGET_OS_LINUX) \ || defined(V8_TARGET_OS_MACOS) \ || defined(V8_TARGET_OS_WIN) \ || defined(V8_TARGET_OS_CHROMEOS)# error A target OS is defined but V8_HAVE_TARGET_OS is unset.# endif // Fall back to the detected host OS.#ifdef V8_OS_ANDROID# define V8_TARGET_OS_ANDROID#endif #ifdef V8_OS_FUCHSIA# define V8_TARGET_OS_FUCHSIA#endif #ifdef V8_OS_IOS# define V8_TARGET_OS_IOS#endif #ifdef V8_OS_LINUX# define V8_TARGET_OS_LINUX#endif #ifdef V8_OS_MACOS# define V8_TARGET_OS_MACOS#endif #ifdef V8_OS_WIN# define V8_TARGET_OS_WIN#endif #endif // V8_HAVE_TARGET_OS #if defined(V8_TARGET_OS_ANDROID)# define V8_TARGET_OS_STRING "android"#elif defined(V8_TARGET_OS_FUCHSIA)# define V8_TARGET_OS_STRING "fuchsia"#elif defined(V8_TARGET_OS_IOS)# define V8_TARGET_OS_STRING "ios"#elif defined(V8_TARGET_OS_LINUX)# define V8_TARGET_OS_STRING "linux"#elif defined(V8_TARGET_OS_MACOS)# define V8_TARGET_OS_STRING "macos"#elif defined(V8_TARGET_OS_WINDOWS)# define V8_TARGET_OS_STRING "windows"#else# define V8_TARGET_OS_STRING "unknown"#endif // -----------------------------------------------------------------------------// C library detection//// V8_LIBC_MSVCRT - MSVC libc// V8_LIBC_BIONIC - Bionic libc// V8_LIBC_BSD - BSD libc derivate// V8_LIBC_GLIBC - GNU C library// V8_LIBC_UCLIBC - uClibc//// Note that testing for libc must be done using #if not #ifdef. For example,// to test for the GNU C library, use:// #if V8_LIBC_GLIBC// ...// #endif #if defined (_MSC_VER)# define V8_LIBC_MSVCRT 1#elif defined(__BIONIC__)# define V8_LIBC_BIONIC 1# define V8_LIBC_BSD 1#elif defined(__UCLIBC__)// Must test for UCLIBC before GLIBC, as UCLIBC pretends to be GLIBC.# define V8_LIBC_UCLIBC 1#elif defined(__GLIBC__) || defined(__GNU_LIBRARY__)# define V8_LIBC_GLIBC 1#else# define V8_LIBC_BSD V8_OS_BSD#endif // -----------------------------------------------------------------------------// Compiler detection//// V8_CC_GNU - GCC, or clang in gcc mode// V8_CC_INTEL - Intel C++// V8_CC_MINGW - Minimalist GNU for Windows// V8_CC_MINGW32 - Minimalist GNU for Windows (mingw32)// V8_CC_MINGW64 - Minimalist GNU for Windows (mingw-w64)// V8_CC_MSVC - Microsoft Visual C/C++, or clang in cl.exe mode//// C++11 feature detection//// Compiler-specific feature detection//// V8_HAS_ATTRIBUTE_ALWAYS_INLINE - __attribute__((always_inline))// supported// V8_HAS_ATTRIBUTE_CONSTINIT - __attribute__((require_constant_// initialization))// supported// V8_HAS_ATTRIBUTE_NONNULL - __attribute__((nonnull)) supported// V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported// V8_HAS_ATTRIBUTE_UNUSED - __attribute__((unused)) supported// V8_HAS_ATTRIBUTE_USED - __attribute__((used)) supported// V8_HAS_ATTRIBUTE_RETAIN - __attribute__((retain)) supported// V8_HAS_ATTRIBUTE_VISIBILITY - __attribute__((visibility)) supported// V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT - __attribute__((warn_unused_result))// supported// V8_HAS_CPP_ATTRIBUTE_NODISCARD - [[nodiscard]] supported// V8_HAS_CPP_ATTRIBUTE_NO_UNIQUE_ADDRESS// - [[no_unique_address]] supported// V8_HAS_BUILTIN_ADD_OVERFLOW - __builtin_add_overflow() supported// V8_HAS_BUILTIN_BIT_CAST - __builtin_bit_cast() supported// V8_HAS_BUILTIN_BSWAP16 - __builtin_bswap16() supported// V8_HAS_BUILTIN_BSWAP32 - __builtin_bswap32() supported// V8_HAS_BUILTIN_BSWAP64 - __builtin_bswap64() supported// V8_HAS_BUILTIN_CLZ - __builtin_clz() supported// V8_HAS_BUILTIN_CTZ - __builtin_ctz() supported// V8_HAS_BUILTIN_EXPECT - __builtin_expect() supported// V8_HAS_BUILTIN_FRAME_ADDRESS - __builtin_frame_address() supported// V8_HAS_BUILTIN_MUL_OVERFLOW - __builtin_mul_overflow() supported// V8_HAS_BUILTIN_POPCOUNT - __builtin_popcount() supported// V8_HAS_BUILTIN_SADD_OVERFLOW - __builtin_sadd_overflow() supported// V8_HAS_BUILTIN_SMUL_OVERFLOW - __builtin_smul_overflow() supported// V8_HAS_BUILTIN_SSUB_OVERFLOW - __builtin_ssub_overflow() supported// V8_HAS_BUILTIN_SUB_OVERFLOW - __builtin_sub_overflow() supported// V8_HAS_BUILTIN_UADD_OVERFLOW - __builtin_uadd_overflow() supported// V8_HAS_COMPUTED_GOTO - computed goto/labels as values// supported// V8_HAS_DECLSPEC_NOINLINE - __declspec(noinline) supported// V8_HAS_DECLSPEC_SELECTANY - __declspec(selectany) supported// V8_HAS___FORCEINLINE - __forceinline supported//// Note that testing for compilers and/or features must be done using #if// not #ifdef. For example, to test for Intel C++ Compiler, use:// #if V8_CC_INTEL// ...// #endif #if defined(__has_cpp_attribute)#define V8_HAS_CPP_ATTRIBUTE(FEATURE) __has_cpp_attribute(FEATURE)#else#define V8_HAS_CPP_ATTRIBUTE(FEATURE) 0#endif #if defined(__clang__) #if defined(__GNUC__) // Clang in gcc mode.# define V8_CC_GNU 1#endif # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline))# define V8_HAS_ATTRIBUTE_CONSTINIT \ (__has_attribute(require_constant_initialization))# define V8_HAS_ATTRIBUTE_CONST (__has_attribute(const))# define V8_HAS_ATTRIBUTE_NONNULL (__has_attribute(nonnull))# define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline))# define V8_HAS_ATTRIBUTE_UNUSED (__has_attribute(unused))# define V8_HAS_ATTRIBUTE_USED (__has_attribute(used))# define V8_HAS_ATTRIBUTE_RETAIN (__has_attribute(retain))# define V8_HAS_ATTRIBUTE_OPTNONE (__has_attribute(optnone))// Support for the "preserve_most" attribute is limited:// - 32-bit platforms do not implement it,// - component builds fail because _dl_runtime_resolve clobbers registers,// - we see crashes on arm64 on Windows (https://crbug.com/1409934), which can// hopefully be fixed in the future.// Additionally, the initial implementation in clang <= 16 overwrote the return// register(s) in the epilogue of a preserve_most function, so we only use// preserve_most in clang >= 17 (see https://reviews.llvm.org/D143425).#if (defined(_M_X64) || defined(__x86_64__) /* x64 (everywhere) */ \ || ((defined(__AARCH64EL__) || defined(_M_ARM64)) /* arm64, but ... */ \ && !defined(_WIN32))) /* not on windows */ \ && !defined(COMPONENT_BUILD) /* no component build */\ && __clang_major__ >= 17 /* clang >= 17 */# define V8_HAS_ATTRIBUTE_PRESERVE_MOST (__has_attribute(preserve_most))#endif# define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility))# define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ (__has_attribute(warn_unused_result))# define V8_HAS_ATTRIBUTE_WEAK (__has_attribute(weak)) # define V8_HAS_CPP_ATTRIBUTE_NODISCARD (V8_HAS_CPP_ATTRIBUTE(nodiscard))#if defined(V8_CC_MSVC)# define V8_HAS_CPP_ATTRIBUTE_NO_UNIQUE_ADDRESS \ (V8_HAS_CPP_ATTRIBUTE(msvc::no_unique_address) || \ V8_HAS_CPP_ATTRIBUTE(no_unique_address))#else# define V8_HAS_CPP_ATTRIBUTE_NO_UNIQUE_ADDRESS \ (V8_HAS_CPP_ATTRIBUTE(no_unique_address))#endif # define V8_HAS_BUILTIN_ADD_OVERFLOW (__has_builtin(__builtin_add_overflow))# define V8_HAS_BUILTIN_ASSUME (__has_builtin(__builtin_assume))# define V8_HAS_BUILTIN_ASSUME_ALIGNED (__has_builtin(__builtin_assume_aligned))# define V8_HAS_BUILTIN_BIT_CAST (__has_builtin(__builtin_bit_cast))# define V8_HAS_BUILTIN_BSWAP16 (__has_builtin(__builtin_bswap16))# define V8_HAS_BUILTIN_BSWAP32 (__has_builtin(__builtin_bswap32))# define V8_HAS_BUILTIN_BSWAP64 (__has_builtin(__builtin_bswap64))# define V8_HAS_BUILTIN_CLZ (__has_builtin(__builtin_clz))# define V8_HAS_BUILTIN_CTZ (__has_builtin(__builtin_ctz))# define V8_HAS_BUILTIN_EXPECT (__has_builtin(__builtin_expect))# define V8_HAS_BUILTIN_FRAME_ADDRESS (__has_builtin(__builtin_frame_address))# define V8_HAS_BUILTIN_MUL_OVERFLOW (__has_builtin(__builtin_mul_overflow))# define V8_HAS_BUILTIN_POPCOUNT (__has_builtin(__builtin_popcount))# define V8_HAS_BUILTIN_SADD_OVERFLOW (__has_builtin(__builtin_sadd_overflow))# define V8_HAS_BUILTIN_SMUL_OVERFLOW (__has_builtin(__builtin_smul_overflow))# define V8_HAS_BUILTIN_SSUB_OVERFLOW (__has_builtin(__builtin_ssub_overflow))# define V8_HAS_BUILTIN_SUB_OVERFLOW (__has_builtin(__builtin_sub_overflow))# define V8_HAS_BUILTIN_UADD_OVERFLOW (__has_builtin(__builtin_uadd_overflow))# define V8_HAS_BUILTIN_UNREACHABLE (__has_builtin(__builtin_unreachable)) // Clang has no __has_feature for computed gotos.// GCC doc: https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html# define V8_HAS_COMPUTED_GOTO 1 #elif defined(__GNUC__) # define V8_CC_GNU 1# if defined(__INTEL_COMPILER) // Intel C++ also masquerades as GCC 3.2.0# define V8_CC_INTEL 1# endif# if defined(__MINGW32__)# define V8_CC_MINGW32 1# endif# if defined(__MINGW64__)# define V8_CC_MINGW64 1# endif# define V8_CC_MINGW (V8_CC_MINGW32 || V8_CC_MINGW64) // FYI: __has_builtin is only available with GCC 10 and later, so explicitly// check GCC version numbers to enable features. TODO(leszeks): Merge feature// enabling for GCC 10 and later into the Clang section above, and leave this// section for GCC 9 and earlier. // always_inline is available in gcc 4.0 but not very reliable until 4.4.// Works around "sorry, unimplemented: inlining failed" build errors with// older compilers.# define V8_HAS_ATTRIBUTE_ALWAYS_INLINE 1# define V8_HAS_ATTRIBUTE_NOINLINE 1# define V8_HAS_ATTRIBUTE_UNUSED 1# define V8_HAS_ATTRIBUTE_VISIBILITY 1# define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT (!V8_CC_INTEL)# define V8_HAS_ATTRIBUTE_WEAK 1 // [[nodiscard]] does not work together with with// __attribute__((visibility(""))) on GCC 7.4 which is why there is no define// for V8_HAS_CPP_ATTRIBUTE_NODISCARD. See https://crbug.com/v8/11707. # define V8_HAS_BUILTIN_ASSUME_ALIGNED 1# if __GNUC__ >= 11# define V8_HAS_BUILTIN_BIT_CAST 1# endif# define V8_HAS_BUILTIN_CLZ 1# define V8_HAS_BUILTIN_CTZ 1# define V8_HAS_BUILTIN_EXPECT 1# define V8_HAS_BUILTIN_FRAME_ADDRESS 1# define V8_HAS_BUILTIN_POPCOUNT 1# define V8_HAS_BUILTIN_UNREACHABLE 1 // GCC doc: https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html#define V8_HAS_COMPUTED_GOTO 1 #endif #if defined(_MSC_VER)# define V8_CC_MSVC 1 # define V8_HAS_DECLSPEC_NOINLINE 1# define V8_HAS_DECLSPEC_SELECTANY 1 # define V8_HAS___FORCEINLINE 1 #endif // -----------------------------------------------------------------------------// Helper macros // A macro used to make better inlining. Don't bother for debug builds.// Use like:// V8_INLINE int GetZero() { return 0; }#if !defined(DEBUG) && V8_HAS_ATTRIBUTE_ALWAYS_INLINE# define V8_INLINE inline __attribute__((always_inline))#elif !defined(DEBUG) && V8_HAS___FORCEINLINE# define V8_INLINE __forceinline#else# define V8_INLINE inline#endif // A macro to force better inlining of calls in a statement. Don't bother for// debug builds.// Use like:// V8_INLINE_STATEMENT foo = bar(); // Will force inlining the bar() call.#if !defined(DEBUG) && defined(__clang__) && V8_HAS_ATTRIBUTE_ALWAYS_INLINE# define V8_INLINE_STATEMENT [[clang::always_inline]]#else# define V8_INLINE_STATEMENT#endif #if V8_HAS_BUILTIN_ASSUME#ifdef DEBUG// In debug mode, check assumptions in addition to adding annotations.// This helps GCC (and maybe other compilers) figure out that certain// situations are unreachable.# define V8_ASSUME(condition) \ do { \ DCHECK(condition); \ __builtin_assume(condition); \ } while (false)#else // DEBUG# define V8_ASSUME __builtin_assume#endif // DEBUG#elif V8_HAS_BUILTIN_UNREACHABLE# define V8_ASSUME(condition) \ do { \ DCHECK(condition); \ if (!(condition)) __builtin_unreachable(); \ } while (false)#else# define V8_ASSUME USE#endif // Prefer c++20 std::assume_aligned. Don't use it on MSVC though, because it's// not happy with our large 4GB alignment values.#if __cplusplus >= 202002L && defined(__cpp_lib_assume_aligned) && !V8_CC_MSVC# define V8_ASSUME_ALIGNED(ptr, alignment) \ std::assume_aligned<(alignment)>(ptr)#elif V8_HAS_BUILTIN_ASSUME_ALIGNED# define V8_ASSUME_ALIGNED(ptr, alignment) \ __builtin_assume_aligned((ptr), (alignment))#else# define V8_ASSUME_ALIGNED(ptr, alignment) (ptr)#endif // A macro to mark functions whose values don't change (e.g. across calls)// and thereby compiler is free to hoist and fold multiple calls together.// Use like:// V8_CONST int foo() { ... }#if V8_HAS_ATTRIBUTE_CONST# define V8_CONST __attribute__((const))#else# define V8_CONST#endif // A macro to mark a declaration as requiring constant initialization.// Use like:// int* foo V8_CONSTINIT;#if V8_HAS_ATTRIBUTE_CONSTINIT# define V8_CONSTINIT __attribute__((require_constant_initialization))#else# define V8_CONSTINIT#endif // A macro to mark specific arguments as non-null.// Use like:// int add(int* x, int y, int* z) V8_NONNULL(1, 3) { return *x + y + *z; }#if V8_HAS_ATTRIBUTE_NONNULL# define V8_NONNULL(...) __attribute__((nonnull(__VA_ARGS__)))#else# define V8_NONNULL(...) /* NOT SUPPORTED */#endif // A macro used to tell the compiler to never inline a particular function.// Use like:// V8_NOINLINE int GetMinusOne() { return -1; }#if V8_HAS_ATTRIBUTE_NOINLINE# define V8_NOINLINE __attribute__((noinline))#elif V8_HAS_DECLSPEC_NOINLINE# define V8_NOINLINE __declspec(noinline)#else# define V8_NOINLINE /* NOT SUPPORTED */#endif // A macro used to change the calling conventions to preserve all registers (no// caller-saved registers). Use this for cold functions called from hot// functions.// Use like:// V8_NOINLINE V8_PRESERVE_MOST void UnlikelyMethod();#if V8_OS_WIN# define V8_PRESERVE_MOST#else#if V8_HAS_ATTRIBUTE_PRESERVE_MOST# define V8_PRESERVE_MOST __attribute__((preserve_most))#else# define V8_PRESERVE_MOST /* NOT SUPPORTED */#endif#endif // A macro (V8_DEPRECATED) to mark classes or functions as deprecated.#if defined(V8_DEPRECATION_WARNINGS)# define V8_DEPRECATED(message) [[deprecated(message)]]#else# define V8_DEPRECATED(message)#endif // A macro (V8_DEPRECATE_SOON) to make it easier to see what will be deprecated.#if defined(V8_IMMINENT_DEPRECATION_WARNINGS)# define V8_DEPRECATE_SOON(message) [[deprecated(message)]]#else# define V8_DEPRECATE_SOON(message)#endif #if defined(V8_IMMINENT_DEPRECATION_WARNINGS) || \ defined(V8_DEPRECATION_WARNINGS)#if defined(V8_CC_MSVC)# define START_ALLOW_USE_DEPRECATED() \ __pragma(warning(push)) \ __pragma(warning(disable : 4996))# define END_ALLOW_USE_DEPRECATED() __pragma(warning(pop))#else // !defined(V8_CC_MSVC)# define START_ALLOW_USE_DEPRECATED() \ _Pragma("GCC diagnostic push") \ _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")#define END_ALLOW_USE_DEPRECATED() _Pragma("GCC diagnostic pop")#endif // !defined(V8_CC_MSVC)#else // !(defined(V8_IMMINENT_DEPRECATION_WARNINGS) || // defined(V8_DEPRECATION_WARNINGS))#define START_ALLOW_USE_DEPRECATED()#define END_ALLOW_USE_DEPRECATED()#endif // !(defined(V8_IMMINENT_DEPRECATION_WARNINGS) || // defined(V8_DEPRECATION_WARNINGS))#define ALLOW_COPY_AND_MOVE_WITH_DEPRECATED_FIELDS(ClassName) \ START_ALLOW_USE_DEPRECATED() \ ClassName(const ClassName&) = default; \ ClassName(ClassName&&) = default; \ ClassName& operator=(const ClassName&) = default; \ ClassName& operator=(ClassName&&) = default; \ END_ALLOW_USE_DEPRECATED() #if defined(__GNUC__) && !defined(__clang__) && (__GNUC__ < 6)# define V8_ENUM_DEPRECATED(message)# define V8_ENUM_DEPRECATE_SOON(message)#else# define V8_ENUM_DEPRECATED(message) V8_DEPRECATED(message)# define V8_ENUM_DEPRECATE_SOON(message) V8_DEPRECATE_SOON(message)#endif // A macro to provide the compiler with branch prediction information.#if V8_HAS_BUILTIN_EXPECT# define V8_UNLIKELY(condition) (__builtin_expect(!!(condition), 0))# define V8_LIKELY(condition) (__builtin_expect(!!(condition), 1))#else# define V8_UNLIKELY(condition) (condition)# define V8_LIKELY(condition) (condition)#endif // Annotate a function indicating the caller must examine the return value.// Use like:// int foo() V8_WARN_UNUSED_RESULT;#if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT#define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result))#else#define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */#endif // Annotate functions/variables as weak to allow overriding the symbol.#if V8_HAS_ATTRIBUTE_WEAK#define V8_WEAK __attribute__((weak))#else#define V8_WEAK /* NOT SUPPORTED */#endif // Annotate a class or constructor indicating the caller must assign the// constructed instances.// Apply to the whole class like:// class V8_NODISCARD Foo() { ... };// or apply to just one constructor like:// V8_NODISCARD Foo() { ... };// [[nodiscard]] comes in C++17 but supported in clang with -std >= c++11.#if V8_HAS_CPP_ATTRIBUTE_NODISCARD#define V8_NODISCARD [[nodiscard]]#else#define V8_NODISCARD /* NOT SUPPORTED */#endif // The no_unique_address attribute allows tail padding in a non-static data// member to overlap other members of the enclosing class (and in the special// case when the type is empty, permits it to fully overlap other members). The// field is laid out as if a base class were encountered at the corresponding// point within the class (except that it does not share a vptr with the// enclosing object).//// Apply to a data member like://// class Foo {// V8_NO_UNIQUE_ADDRESS Bar bar_;// };//// [[no_unique_address]] comes in C++20 but supported in clang with// -std >= c++11.#if V8_HAS_CPP_ATTRIBUTE_NO_UNIQUE_ADDRESS#if defined(V8_CC_MSVC) && V8_HAS_CPP_ATTRIBUTE(msvc::no_unique_address)// Unfortunately MSVC ignores [[no_unique_address]] (see// https://devblogs.microsoft.com/cppblog/msvc-cpp20-and-the-std-cpp20-switch/#msvc-extensions-and-abi),// and clang-cl matches it for ABI compatibility reasons. We need to prefer// [[msvc::no_unique_address]] when available if we actually want any effect.#define V8_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]#else#define V8_NO_UNIQUE_ADDRESS [[no_unique_address]]#endif#else#define V8_NO_UNIQUE_ADDRESS /* NOT SUPPORTED */#endif // Marks a type as being eligible for the "trivial" ABI despite having a// non-trivial destructor or copy/move constructor. Such types can be relocated// after construction by simply copying their memory, which makes them eligible// to be passed in registers. The canonical example is std::unique_ptr.//// Use with caution; this has some subtle effects on constructor/destructor// ordering and will be very incorrect if the type relies on its address// remaining constant. When used as a function argument (by value), the value// may be constructed in the caller's stack frame, passed in a register, and// then used and destructed in the callee's stack frame. A similar thing can// occur when values are returned.//// TRIVIAL_ABI is not needed for types which have a trivial destructor and// copy/move constructors, since those are automatically trivial by the ABI// spec.//// It is also not likely to be effective on types too large to be passed in one// or two registers on typical target ABIs.//// See also:// https://clang.llvm.org/docs/AttributeReference.html#trivial-abi// https://libcxx.llvm.org/docs/DesignDocs/UniquePtrTrivialAbi.html#if defined(__clang__) && defined(__has_attribute)#if __has_attribute(trivial_abi)#define V8_TRIVIAL_ABI [[clang::trivial_abi]]#define V8_HAS_ATTRIBUTE_TRIVIAL_ABI 1#endif // __has_attribute(trivial_abi)#endif // defined(__clang__) && defined(__has_attribute)#if !defined(V8_TRIVIAL_ABI)#define V8_TRIVIAL_ABI#define V8_HAS_ATTRIBUTE_TRIVIAL_ABI 0#endif //!defined(V8_TRIVIAL_ABI) // Helper macro to define no_sanitize attributes only with clang.#if defined(__clang__) && defined(__has_attribute)#if __has_attribute(no_sanitize)#define V8_CLANG_NO_SANITIZE(what) __attribute__((no_sanitize(what)))#endif#endif#if !defined(V8_CLANG_NO_SANITIZE)#define V8_CLANG_NO_SANITIZE(what)#endif // Exposing private symbols requires exposing public symbols too.#ifdef BUILDING_V8_SHARED_PRIVATE#define BUILDING_V8_SHARED#endif #if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED)#error Inconsistent build configuration: To build the V8 shared library \set BUILDING_V8_SHARED, to include its headers for linking against the \V8 shared library set USING_V8_SHARED.#endif #ifdef V8_OS_WIN // Setup for Windows DLL export/import. When building the V8 DLL the// BUILDING_V8_SHARED needs to be defined. When building a program which uses// the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8// static library or building a program which uses the V8 static library neither// BUILDING_V8_SHARED nor USING_V8_SHARED should be defined.#ifdef BUILDING_V8_SHARED# define V8_EXPORT __declspec(dllexport)#elif USING_V8_SHARED# define V8_EXPORT __declspec(dllimport)#else# define V8_EXPORT#endif // BUILDING_V8_SHARED #else // V8_OS_WIN // Setup for Linux shared library export.#if V8_HAS_ATTRIBUTE_VISIBILITY && (defined(BUILDING_V8_SHARED) || USING_V8_SHARED)# define V8_EXPORT __attribute__((visibility("default")))#else# define V8_EXPORT# endif // V8_HAS_ATTRIBUTE_VISIBILITY && ... #endif // V8_OS_WIN // clang-format on // Processor architecture detection. For more info on what's defined, see:// http://msdn.microsoft.com/en-us/library/b0084kay.aspx// http://www.agner.org/optimize/calling_conventions.pdf// or with gcc, run: "echo | gcc -E -dM -"// The V8_HOST_ARCH_* macros correspond to the architecture on which V8, as a// virtual machine and compiler, runs. Don't confuse this with the architecture// on which V8 is built.#if defined(_M_X64) || defined(__x86_64__)#define V8_HOST_ARCH_X64 1#if defined(__x86_64__) && __SIZEOF_POINTER__ == 4 // Check for x32.#define V8_HOST_ARCH_32_BIT 1#else#define V8_HOST_ARCH_64_BIT 1#endif#elif defined(_M_IX86) || defined(__i386__)#define V8_HOST_ARCH_IA32 1#define V8_HOST_ARCH_32_BIT 1#elif defined(__AARCH64EL__) || defined(_M_ARM64)#define V8_HOST_ARCH_ARM64 1#define V8_HOST_ARCH_64_BIT 1#elif defined(__ARMEL__)#define V8_HOST_ARCH_ARM 1#define V8_HOST_ARCH_32_BIT 1#elif defined(__mips64)#define V8_HOST_ARCH_MIPS64 1#define V8_HOST_ARCH_64_BIT 1#elif defined(__loongarch_lp64)#define V8_HOST_ARCH_LOONG64 1#define V8_HOST_ARCH_64_BIT 1#elif defined(__PPC64__) || defined(_ARCH_PPC64)#define V8_HOST_ARCH_PPC64 1#define V8_HOST_ARCH_64_BIT 1#elif defined(__s390x__)#define V8_HOST_ARCH_S390X 1#define V8_HOST_ARCH_64_BIT 1#elif defined(__riscv) || defined(__riscv__)#if __riscv_xlen == 64#define V8_HOST_ARCH_RISCV64 1#define V8_HOST_ARCH_64_BIT 1#elif __riscv_xlen == 32#define V8_HOST_ARCH_RISCV32 1#define V8_HOST_ARCH_32_BIT 1#else#error "Cannot detect Riscv's bitwidth"#endif#else#error "Host architecture was not detected as supported by v8"#endif // Target architecture detection. This corresponds to the architecture for which// V8's JIT will generate code (the last stage of the canadian cross-compiler).// The macros may be set externally. If not, detect in the same way as the host// architecture, that is, target the native environment as presented by the// compiler.#if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_ARM && \ !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS64 && \ !V8_TARGET_ARCH_PPC64 && !V8_TARGET_ARCH_S390X && \ !V8_TARGET_ARCH_RISCV64 && !V8_TARGET_ARCH_LOONG64 && \ !V8_TARGET_ARCH_RISCV32#if defined(_M_X64) || defined(__x86_64__)#define V8_TARGET_ARCH_X64 1#elif defined(_M_IX86) || defined(__i386__)#define V8_TARGET_ARCH_IA32 1#elif defined(__AARCH64EL__) || defined(_M_ARM64)#define V8_TARGET_ARCH_ARM64 1#elif defined(__ARMEL__)#define V8_TARGET_ARCH_ARM 1#elif defined(__mips64)#define V8_TARGET_ARCH_MIPS64 1#elif defined(__loongarch_lp64)#define V8_TARGET_ARCH_LOONG64 1#elif defined(_ARCH_PPC64)#define V8_TARGET_ARCH_PPC64 1#elif defined(__s390x__)#define V8_TARGET_ARCH_S390X 1#elif defined(__riscv) || defined(__riscv__)#if __riscv_xlen == 64#define V8_TARGET_ARCH_RISCV64 1#elif __riscv_xlen == 32#define V8_TARGET_ARCH_RISCV32 1#endif#else#error Target architecture was not detected as supported by v8#endif#endif // Determine architecture pointer size.#if V8_TARGET_ARCH_IA32#define V8_TARGET_ARCH_32_BIT 1#elif V8_TARGET_ARCH_X64#if !V8_TARGET_ARCH_32_BIT && !V8_TARGET_ARCH_64_BIT#if defined(__x86_64__) && __SIZEOF_POINTER__ == 4 // Check for x32.#define V8_TARGET_ARCH_32_BIT 1#else#define V8_TARGET_ARCH_64_BIT 1#endif#endif#elif V8_TARGET_ARCH_ARM#define V8_TARGET_ARCH_32_BIT 1#elif V8_TARGET_ARCH_ARM64#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_MIPS#define V8_TARGET_ARCH_32_BIT 1#elif V8_TARGET_ARCH_MIPS64#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_LOONG64#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_PPC64#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_S390X#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_RISCV64#define V8_TARGET_ARCH_64_BIT 1#elif V8_TARGET_ARCH_RISCV32#define V8_TARGET_ARCH_32_BIT 1#else#error Unknown target architecture pointer size#endif // Check for supported combinations of host and target architectures.#if V8_TARGET_ARCH_IA32 && !V8_HOST_ARCH_IA32#error Target architecture ia32 is only supported on ia32 host#endif#if (V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT && \ !((V8_HOST_ARCH_X64 || V8_HOST_ARCH_ARM64) && V8_HOST_ARCH_64_BIT))#error Target architecture x64 is only supported on x64 and arm64 host#endif#if (V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT && \ !(V8_HOST_ARCH_X64 && V8_HOST_ARCH_32_BIT))#error Target architecture x32 is only supported on x64 host with x32 support#endif#if (V8_TARGET_ARCH_ARM && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_ARM))#error Target architecture arm is only supported on arm and ia32 host#endif#if (V8_TARGET_ARCH_ARM64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_ARM64))#error Target architecture arm64 is only supported on arm64 and x64 host#endif#if (V8_TARGET_ARCH_MIPS64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_MIPS64))#error Target architecture mips64 is only supported on mips64 and x64 host#endif#if (V8_TARGET_ARCH_RISCV64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_RISCV64))#error Target architecture riscv64 is only supported on riscv64 and x64 host#endif#if (V8_TARGET_ARCH_RISCV32 && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_RISCV32))#error Target architecture riscv32 is only supported on riscv32 and ia32 host#endif#if (V8_TARGET_ARCH_LOONG64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_LOONG64))#error Target architecture loong64 is only supported on loong64 and x64 host#endif // Determine architecture endianness.#if V8_TARGET_ARCH_IA32#define V8_TARGET_LITTLE_ENDIAN 1#elif V8_TARGET_ARCH_X64#define V8_TARGET_LITTLE_ENDIAN 1#elif V8_TARGET_ARCH_ARM#define V8_TARGET_LITTLE_ENDIAN 1#elif V8_TARGET_ARCH_ARM64#define V8_TARGET_LITTLE_ENDIAN 1#elif V8_TARGET_ARCH_LOONG64#define V8_TARGET_LITTLE_ENDIAN 1#elif V8_TARGET_ARCH_MIPS64#if defined(__MIPSEB__) || defined(V8_TARGET_ARCH_MIPS64_BE)#define V8_TARGET_BIG_ENDIAN 1#else#define V8_TARGET_LITTLE_ENDIAN 1#endif#elif V8_TARGET_ARCH_PPC64#if V8_OS_AIX#define V8_TARGET_BIG_ENDIAN 1#else#define V8_TARGET_LITTLE_ENDIAN 1#endif#elif V8_TARGET_ARCH_S390X#if V8_TARGET_ARCH_S390X_LE_SIM#define V8_TARGET_LITTLE_ENDIAN 1#else#define V8_TARGET_BIG_ENDIAN 1#endif#elif V8_TARGET_ARCH_RISCV32 || V8_TARGET_ARCH_RISCV64#define V8_TARGET_LITTLE_ENDIAN 1#elif defined(__BYTE_ORDER__)#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__#define V8_TARGET_BIG_ENDIAN 1#else#define V8_TARGET_LITTLE_ENDIAN 1#endif#else#error Unknown target architecture endianness#endif #undef V8_HAS_CPP_ATTRIBUTE #if !defined(V8_STATIC_ROOTS)#define V8_STATIC_ROOTS_BOOL false#else#define V8_STATIC_ROOTS_BOOL true#endif#ifdef V8_TARGET_BIG_ENDIAN#define V8_TARGET_BIG_ENDIAN_BOOL true#else#define V8_TARGET_BIG_ENDIAN_BOOL false#endif #endif // V8CONFIG_H_