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 // Must be defined before pulling in headers from libc++. Allow downstream 15 // build systems to override this value. 16 // https://libcxx.llvm.org/UsingLibcxx.html#enabling-the-safe-libc-mode 17 #ifndef _LIBCPP_VERBOSE_ABORT 18 #define _LIBCPP_VERBOSE_ABORT(...) __abort_message(__VA_ARGS__) 19 #include "../abort_message.h" 20 #endif 21 22 #include <version> 23 24 #ifdef _MSC_VER 25 // snprintf is implemented in VS 2015 26 #if _MSC_VER < 1900 27 #define snprintf _snprintf_s 28 #endif 29 #endif 30 31 #ifndef __has_feature 32 #define __has_feature(x) 0 33 #endif 34 35 #ifndef __has_cpp_attribute 36 #define __has_cpp_attribute(x) 0 37 #endif 38 39 #ifndef __has_attribute 40 #define __has_attribute(x) 0 41 #endif 42 43 #ifndef __has_builtin 44 #define __has_builtin(x) 0 45 #endif 46 47 #ifndef DEMANGLE_GNUC_PREREQ 48 #if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__) 49 #define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 50 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) + __GNUC_PATCHLEVEL__ >= \ 51 ((maj) << 20) + ((min) << 10) + (patch)) 52 #elif defined(__GNUC__) && defined(__GNUC_MINOR__) 53 #define DEMANGLE_GNUC_PREREQ(maj, min, patch) \ 54 ((__GNUC__ << 20) + (__GNUC_MINOR__ << 10) >= ((maj) << 20) + ((min) << 10)) 55 #else 56 #define DEMANGLE_GNUC_PREREQ(maj, min, patch) 0 57 #endif 58 #endif 59 60 #if __has_attribute(used) || DEMANGLE_GNUC_PREREQ(3, 1, 0) 61 #define DEMANGLE_ATTRIBUTE_USED __attribute__((__used__)) 62 #else 63 #define DEMANGLE_ATTRIBUTE_USED 64 #endif 65 66 #if __has_builtin(__builtin_unreachable) || DEMANGLE_GNUC_PREREQ(4, 5, 0) 67 #define DEMANGLE_UNREACHABLE __builtin_unreachable() 68 #elif defined(_MSC_VER) 69 #define DEMANGLE_UNREACHABLE __assume(false) 70 #else 71 #define DEMANGLE_UNREACHABLE 72 #endif 73 74 #if __has_attribute(noinline) || DEMANGLE_GNUC_PREREQ(3, 4, 0) 75 #define DEMANGLE_ATTRIBUTE_NOINLINE __attribute__((noinline)) 76 #elif defined(_MSC_VER) 77 #define DEMANGLE_ATTRIBUTE_NOINLINE __declspec(noinline) 78 #else 79 #define DEMANGLE_ATTRIBUTE_NOINLINE 80 #endif 81 82 #if !defined(NDEBUG) 83 #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE DEMANGLE_ATTRIBUTE_USED 84 #else 85 #define DEMANGLE_DUMP_METHOD DEMANGLE_ATTRIBUTE_NOINLINE 86 #endif 87 88 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 89 #define DEMANGLE_FALLTHROUGH [[fallthrough]] 90 #elif __has_cpp_attribute(gnu::fallthrough) 91 #define DEMANGLE_FALLTHROUGH [[gnu::fallthrough]] 92 #elif !__cplusplus 93 // Workaround for llvm.org/PR23435, since clang 3.6 and below emit a spurious 94 // error when __has_cpp_attribute is given a scoped attribute in C mode. 95 #define DEMANGLE_FALLTHROUGH 96 #elif __has_cpp_attribute(clang::fallthrough) 97 #define DEMANGLE_FALLTHROUGH [[clang::fallthrough]] 98 #else 99 #define DEMANGLE_FALLTHROUGH 100 #endif 101 102 #ifndef DEMANGLE_ASSERT 103 #include <cassert> 104 #define DEMANGLE_ASSERT(__expr, __msg) assert((__expr) && (__msg)) 105 #endif 106 107 #define DEMANGLE_NAMESPACE_BEGIN namespace { namespace itanium_demangle { 108 #define DEMANGLE_NAMESPACE_END } } 109 110 #endif // LIBCXXABI_DEMANGLE_DEMANGLE_CONFIG_H 111