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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_ #ifdef V8_GN_HEADER #if __cplusplus >= 201703L && !__has_include("v8-gn.h") #error Missing v8-gn.h. The configuration for v8 is missing from the include \ path. Add it with -I to the command line #endif #include "v8-gn.h" // NOLINT(build/include_directory) #endif // clang-format off // Platform headers for feature detection below. #if defined(__ANDROID__) # include #elif defined(__APPLE__) # include #elif defined(__linux__) # include #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 (Mac OS X, Net/Free/Open/DragonFlyBSD) // V8_OS_CYGWIN - Cygwin // V8_OS_DRAGONFLYBSD - DragonFlyBSD // V8_OS_FREEBSD - FreeBSD // V8_OS_FUCHSIA - Fuchsia // V8_OS_LINUX - Linux // V8_OS_MACOSX - Mac OS X // 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 #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_BSD 1 # define V8_OS_MACOSX 1 # define V8_OS_POSIX 1 # if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE # define V8_OS_IOS 1 # define V8_OS_STRING "ios" # else # 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" #endif // ----------------------------------------------------------------------------- // Operating system detection (target) // // V8_TARGET_OS_ANDROID // V8_TARGET_OS_FUCHSIA // V8_TARGET_OS_IOS // V8_TARGET_OS_LINUX // V8_TARGET_OS_MACOSX // V8_TARGET_OS_WIN // // 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_MACOSX) \ && !defined(V8_TARGET_OS_WIN) # 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_MACOSX) \ || defined(V8_TARGET_OS_WIN) # 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_MACOSX # define V8_TARGET_OS_MACOSX #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_MACOSX) # 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_NONNULL - __attribute__((nonnull)) supported // V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported // V8_HAS_ATTRIBUTE_UNUSED - __attribute__((unused)) 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_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_POPCOUNT - __builtin_popcount() supported // V8_HAS_BUILTIN_SADD_OVERFLOW - __builtin_sadd_overflow() supported // V8_HAS_BUILTIN_SSUB_OVERFLOW - __builtin_ssub_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_NONNULL (__has_attribute(nonnull)) # define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline)) # define V8_HAS_ATTRIBUTE_UNUSED (__has_attribute(unused)) # define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility)) # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ (__has_attribute(warn_unused_result)) # define V8_HAS_CPP_ATTRIBUTE_NODISCARD (V8_HAS_CPP_ATTRIBUTE(nodiscard)) # define V8_HAS_BUILTIN_ASSUME_ALIGNED (__has_builtin(__builtin_assume_aligned)) # 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_POPCOUNT (__has_builtin(__builtin_popcount)) # define V8_HAS_BUILTIN_SADD_OVERFLOW (__has_builtin(__builtin_sadd_overflow)) # define V8_HAS_BUILTIN_SSUB_OVERFLOW (__has_builtin(__builtin_ssub_overflow)) # define V8_HAS_BUILTIN_UADD_OVERFLOW (__has_builtin(__builtin_uadd_overflow)) // 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) // 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) // [[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 # 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 // 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 #if 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 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 (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(__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 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 // 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 #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 # ifdef BUILDING_V8_SHARED # define V8_EXPORT __attribute__ ((visibility("default"))) # else # define V8_EXPORT # endif #else # define V8_EXPORT #endif #endif // V8_OS_WIN // clang-format on #undef V8_HAS_CPP_ATTRIBUTE #endif // V8CONFIG_H_