1//===--- DemangleConfig.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// This file is contains a subset of macros copied from 8// llvm/include/llvm/Demangle/DemangleConfig.h 9//===----------------------------------------------------------------------===// 10 11#ifndef LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H 12#define LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H 13 14#include <ciso646> 15 16#ifdef _MSC_VER 17// snprintf is implemented in VS 2015 18#if _MSC_VER < 1900 19#define snprintf _snprintf_s 20#endif 21#endif 22 23#ifndef __has_feature 24#define __has_feature(x) 0 25#endif 26 27#ifndef __has_cpp_attribute 28#define __has_cpp_attribute(x) 0 29#endif 30 31#ifndef __has_attribute 32#define __has_attribute(x) 0 33#endif 34 35#ifndef __has_builtin 36#define __has_builtin(x) 0 37#endif 38 39#ifndef DEMANGLE_GNUC_PREREQ 40#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) 41#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 42 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ 43 ((maj) << 20) + ((min) << 10) + (patch)) 44#elif defined(__GNUC__) && defined(__GNUC_MINOR__) 45#define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 46 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) 47#else 48#define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0 49#endif 50#endif 51 52#if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0) 53#define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__)) 54#else 55#define DEMANGLE_ATTRIBUTE_USED 56#endif 57 58#if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0) 59#define DEMANGLE_UNREACHABLE __builtin_unreachable() 60#elif defined(_MSC_VER) 61#define DEMANGLE_UNREACHABLE __assume(false) 62#else 63#define DEMANGLE_UNREACHABLE 64#endif 65 66#if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0) 67#define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline)) 68#elif defined(_MSC_VER) 69#define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline) 70#else 71#define DEMANGLE_ATTRIBUTE_NOINLINE 72#endif 73 74#if !defined(NDEBUG) 75#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED 76#else 77#define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE 78#endif 79 80#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 81#define DEMANGLE_FALLTHROUGH [[fallthrough]] 82#elif __has_cpp_attribute(gnu::fallthrough) 83#define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]] 84#elif !__cplusplus 85// Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious 86// error when __has_cpp_attribute is given a scoped attribute in C mode. 87#define DEMANGLE_FALLTHROUGH 88#elif __has_cpp_attribute(clang::fallthrough) 89#define DEMANGLE_FALLTHROUGH [[clang::fallthrough]] 90#else 91#define DEMANGLE_FALLTHROUGH 92#endif 93 94#define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle { 95#define DEMANGLE_NAMESPACE_END } } 96 97#endif // LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H 98