1 #ifndef BOOST_CORE_DEMANGLE_HPP_INCLUDED
2 #define BOOST_CORE_DEMANGLE_HPP_INCLUDED
3 
4 // core::demangle
5 //
6 // Copyright 2014 Peter Dimov
7 // Copyright 2014 Andrey Semashev
8 //
9 // Distributed under the Boost Software License, Version 1.0.
10 // See accompanying file LICENSE_1_0.txt or copy at
11 // http://www.boost.org/LICENSE_1_0.txt
12 
13 #include <boost/config.hpp>
14 #include <string>
15 
16 #if defined(BOOST_HAS_PRAGMA_ONCE)
17 # pragma once
18 #endif
19 
20 // __has_include is currently supported by GCC and Clang. However GCC 4.9 may have issues and
21 // returns 1 for 'defined( __has_include )', while '__has_include' is actually not supported:
22 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63662
23 #if defined( __has_include ) && (!defined( BOOST_GCC ) || (__GNUC__ + 0) >= 5)
24 # if __has_include(<cxxabi.h>)
25 #  define BOOST_CORE_HAS_CXXABI_H
26 # endif
27 #elif defined( __GLIBCXX__ ) || defined( __GLIBCPP__ )
28 # define BOOST_CORE_HAS_CXXABI_H
29 #endif
30 
31 #if defined( BOOST_CORE_HAS_CXXABI_H )
32 # include <cxxabi.h>
33 // For some archtectures (mips, mips64, x86, x86_64) cxxabi.h in Android NDK is implemented by gabi++ library
34 // (https://android.googlesource.com/platform/ndk/+/master/sources/cxx-stl/gabi++/), which does not implement
35 // abi::__cxa_demangle(). We detect this implementation by checking the include guard here.
36 # if defined( __GABIXX_CXXABI_H__ )
37 #  undef BOOST_CORE_HAS_CXXABI_H
38 # else
39 #  include <cstdlib>
40 #  include <cstddef>
41 # endif
42 #endif
43 
44 namespace boost
45 {
46 
47 namespace core
48 {
49 
50 inline char const * demangle_alloc( char const * name ) BOOST_NOEXCEPT;
51 inline void demangle_free( char const * name ) BOOST_NOEXCEPT;
52 
53 class scoped_demangled_name
54 {
55 private:
56     char const * m_p;
57 
58 public:
scoped_demangled_name(char const * name)59     explicit scoped_demangled_name( char const * name ) BOOST_NOEXCEPT :
60         m_p( demangle_alloc( name ) )
61     {
62     }
63 
~scoped_demangled_name()64     ~scoped_demangled_name() BOOST_NOEXCEPT
65     {
66         demangle_free( m_p );
67     }
68 
get() const69     char const * get() const BOOST_NOEXCEPT
70     {
71         return m_p;
72     }
73 
74     BOOST_DELETED_FUNCTION(scoped_demangled_name( scoped_demangled_name const& ))
75     BOOST_DELETED_FUNCTION(scoped_demangled_name& operator= ( scoped_demangled_name const& ))
76 };
77 
78 
79 #if defined( BOOST_CORE_HAS_CXXABI_H )
80 
demangle_alloc(char const * name)81 inline char const * demangle_alloc( char const * name ) BOOST_NOEXCEPT
82 {
83     int status = 0;
84     std::size_t size = 0;
85     return abi::__cxa_demangle( name, NULL, &size, &status );
86 }
87 
demangle_free(char const * name)88 inline void demangle_free( char const * name ) BOOST_NOEXCEPT
89 {
90     std::free( const_cast< char* >( name ) );
91 }
92 
demangle(char const * name)93 inline std::string demangle( char const * name )
94 {
95     scoped_demangled_name demangled_name( name );
96     char const * p = demangled_name.get();
97     if( !p )
98         p = name;
99     return p;
100 }
101 
102 #else
103 
demangle_alloc(char const * name)104 inline char const * demangle_alloc( char const * name ) BOOST_NOEXCEPT
105 {
106     return name;
107 }
108 
demangle_free(char const *)109 inline void demangle_free( char const * ) BOOST_NOEXCEPT
110 {
111 }
112 
demangle(char const * name)113 inline std::string demangle( char const * name )
114 {
115     return name;
116 }
117 
118 #endif
119 
120 } // namespace core
121 
122 } // namespace boost
123 
124 #undef BOOST_CORE_HAS_CXXABI_H
125 
126 #endif // #ifndef BOOST_CORE_DEMANGLE_HPP_INCLUDED
127