1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // Demangle.cc -- Convert a mangled name into a human readable name. |
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8 | // |
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9 | // Author : Rob Schluntz |
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10 | // Created On : Thu Jul 19 12:52:41 2018 |
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11 | // Last Modified By : Andrew Beach |
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12 | // Last Modified On : Mon Nov 6 15:59:00 2023 |
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13 | // Update Count : 12 |
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14 | // |
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15 | |
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16 | #include <algorithm> |
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17 | #include <sstream> |
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18 | |
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19 | #include "AST/Pass.hpp" |
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20 | #include "AST/Type.hpp" |
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21 | #include "CodeGen/GenType.h" |
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22 | #include "CodeGen/OperatorTable.h" |
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23 | #include "Common/utility.h" // isPrefix |
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24 | #include "Mangler.h" |
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25 | |
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26 | #define DEBUG |
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27 | #ifdef DEBUG |
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28 | #define PRINT(x) x |
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29 | #else |
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30 | #define PRINT(x) {} |
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31 | #endif |
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32 | |
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33 | namespace Mangle { |
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34 | |
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35 | namespace { |
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36 | |
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37 | struct Demangler { |
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38 | private: |
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39 | std::string str; |
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40 | size_t index = 0; |
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41 | using Parser = std::function<ast::Type * ( ast::CV::Qualifiers )>; |
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42 | std::vector<std::pair<std::string, Parser>> parsers; |
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43 | public: |
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44 | Demangler( const std::string & str ); |
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45 | |
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46 | bool done() const { return str.size() <= index; } |
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47 | char cur() const { assert( !done() ); return str[index]; } |
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48 | bool expect( char ch ) { return str[index++] == ch; } |
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49 | |
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50 | bool isPrefix( const std::string & pref ); |
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51 | bool extractNumber( size_t & out ); |
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52 | bool extractName( std::string & out ); |
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53 | bool stripMangleName( std::string & name ); |
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54 | |
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55 | ast::Type * parseFunction( ast::CV::Qualifiers tq ); |
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56 | ast::Type * parseTuple( ast::CV::Qualifiers tq ); |
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57 | ast::Type * parsePointer( ast::CV::Qualifiers tq ); |
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58 | ast::Type * parseArray( ast::CV::Qualifiers tq ); |
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59 | ast::Type * parseStruct( ast::CV::Qualifiers tq ); |
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60 | ast::Type * parseUnion( ast::CV::Qualifiers tq ); |
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61 | ast::Type * parseEnum( ast::CV::Qualifiers tq ); |
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62 | ast::Type * parseType( ast::CV::Qualifiers tq ); |
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63 | ast::Type * parseZero( ast::CV::Qualifiers tq ); |
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64 | ast::Type * parseOne( ast::CV::Qualifiers tq ); |
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65 | |
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66 | ast::Type * parseType(); |
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67 | bool parse( std::string & name, ast::Type *& type ); |
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68 | }; |
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69 | |
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70 | Demangler::Demangler(const std::string & str) : str(str) { |
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71 | for (size_t k = 0; k < ast::BasicType::NUMBER_OF_BASIC_TYPES; ++k) { |
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72 | parsers.emplace_back(Encoding::basicTypes[k], [k]( ast::CV::Qualifiers tq ) { |
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73 | PRINT( std::cerr << "basic type: " << k << std::endl; ) |
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74 | return new ast::BasicType( (ast::BasicType::Kind)k, tq ); |
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75 | }); |
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76 | } |
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77 | |
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78 | for (size_t k = 0; k < ast::TypeDecl::NUMBER_OF_KINDS; ++k) { |
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79 | static const std::string typeVariableNames[] = { "DT", "DST", "OT", "FT", "TT", "ALT", }; |
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80 | static_assert( |
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81 | sizeof(typeVariableNames)/sizeof(typeVariableNames[0]) == ast::TypeDecl::NUMBER_OF_KINDS, |
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82 | "Each type variable kind should have a demangle name prefix" |
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83 | ); |
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84 | parsers.emplace_back(Encoding::typeVariables[k], [k, this]( ast::CV::Qualifiers tq ) -> ast::TypeInstType * { |
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85 | PRINT( std::cerr << "type variable type: " << k << std::endl; ) |
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86 | size_t N; |
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87 | if (!extractNumber(N)) return nullptr; |
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88 | return new ast::TypeInstType( |
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89 | toString(typeVariableNames[k], N), |
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90 | (ast::TypeDecl::Kind)k, |
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91 | tq ); |
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92 | }); |
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93 | } |
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94 | |
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95 | parsers.emplace_back(Encoding::void_t, [this]( ast::CV::Qualifiers tq ) { return new ast::VoidType(tq); }); |
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96 | parsers.emplace_back(Encoding::function, [this]( ast::CV::Qualifiers tq ) { return parseFunction(tq); }); |
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97 | parsers.emplace_back(Encoding::pointer, [this]( ast::CV::Qualifiers tq ) { return parsePointer(tq); }); |
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98 | parsers.emplace_back(Encoding::array, [this]( ast::CV::Qualifiers tq ) { return parseArray(tq); }); |
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99 | parsers.emplace_back(Encoding::tuple, [this]( ast::CV::Qualifiers tq ) { return parseTuple(tq); }); |
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100 | parsers.emplace_back(Encoding::struct_t, [this]( ast::CV::Qualifiers tq ) { return parseStruct(tq); }); |
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101 | parsers.emplace_back(Encoding::union_t, [this]( ast::CV::Qualifiers tq ) { return parseUnion(tq); }); |
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102 | parsers.emplace_back(Encoding::enum_t, [this]( ast::CV::Qualifiers tq ) { return parseEnum(tq); }); |
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103 | parsers.emplace_back(Encoding::type, [this]( ast::CV::Qualifiers tq ) { return parseType(tq); }); |
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104 | parsers.emplace_back(Encoding::zero, []( ast::CV::Qualifiers tq ) { return new ast::ZeroType(tq); }); |
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105 | parsers.emplace_back(Encoding::one, []( ast::CV::Qualifiers tq ) { return new ast::OneType(tq); }); |
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106 | } |
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107 | |
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108 | bool Demangler::extractNumber( size_t & out ) { |
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109 | std::stringstream numss; |
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110 | if ( str.size() <= index ) return false; |
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111 | while ( isdigit( str[index] ) ) { |
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112 | numss << str[index]; |
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113 | ++index; |
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114 | if ( str.size() == index ) break; |
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115 | } |
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116 | if ( !(numss >> out) ) return false; |
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117 | PRINT( std::cerr << "extractNumber success: " << out << std::endl; ) |
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118 | return true; |
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119 | } |
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120 | |
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121 | bool Demangler::extractName( std::string & out ) { |
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122 | size_t len; |
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123 | if ( !extractNumber(len) ) return false; |
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124 | if ( str.size() < index + len ) return false; |
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125 | out = str.substr( index, len ); |
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126 | index += len; |
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127 | PRINT( std::cerr << "extractName success: " << out << std::endl; ) |
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128 | return true; |
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129 | } |
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130 | |
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131 | bool Demangler::isPrefix( const std::string & pref ) { |
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132 | // Wraps the utility isPrefix function. |
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133 | if ( ::isPrefix( str, pref, index ) ) { |
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134 | index += pref.size(); |
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135 | return true; |
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136 | } |
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137 | return false; |
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138 | } |
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139 | |
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140 | // strips __NAME__cfa__TYPE_N, where N is [0-9]+: returns str is a match is found, returns empty string otherwise |
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141 | bool Demangler::stripMangleName( std::string & name ) { |
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142 | PRINT( std::cerr << "====== " << str.size() << " " << str << std::endl; ) |
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143 | if (str.size() < 2+Encoding::manglePrefix.size()) return false; // +2 for at least _1 suffix |
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144 | if ( !isPrefix(Encoding::manglePrefix) || !isdigit(str.back() ) ) return false; |
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145 | |
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146 | if (!extractName(name)) return false; |
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147 | |
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148 | // Find bounds for type. |
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149 | PRINT( std::cerr << index << " " << str.size() << std::endl; ) |
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150 | PRINT( std::cerr << "["); |
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151 | while (isdigit(str.back())) { |
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152 | PRINT(std::cerr << "."); |
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153 | str.pop_back(); |
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154 | if (str.size() <= index) return false; |
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155 | } |
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156 | PRINT( std::cerr << "]" << std::endl ); |
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157 | if (str.back() != '_') return false; |
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158 | str.pop_back(); |
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159 | PRINT( std::cerr << str.size() << " " << name << " " << str.substr(index) << std::endl; ) |
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160 | return index < str.size(); |
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161 | } |
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162 | |
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163 | ast::Type * Demangler::parseFunction( ast::CV::Qualifiers tq ) { |
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164 | PRINT( std::cerr << "function..." << std::endl; ) |
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165 | if ( done() ) return nullptr; |
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166 | ast::FunctionType * ftype = new ast::FunctionType( ast::FixedArgs, tq ); |
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167 | std::unique_ptr<ast::Type> manager( ftype ); |
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168 | ast::Type * retVal = parseType(); |
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169 | if ( !retVal ) return nullptr; |
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170 | PRINT( std::cerr << "with return type: " << retVal << std::endl; ) |
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171 | ftype->returns.emplace_back( retVal ); |
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172 | if ( done() || !expect('_') ) return nullptr; |
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173 | while ( !done() ) { |
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174 | PRINT( std::cerr << "got ch: " << cur() << std::endl; ) |
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175 | if ( cur() == '_' ) return manager.release(); |
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176 | ast::Type * param = parseType(); |
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177 | if ( !param ) return nullptr; |
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178 | PRINT( std::cerr << "with parameter : " << param << std::endl; ) |
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179 | ftype->params.emplace_back( param ); |
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180 | } |
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181 | return nullptr; |
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182 | } |
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183 | |
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184 | ast::Type * Demangler::parseTuple( ast::CV::Qualifiers tq ) { |
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185 | PRINT( std::cerr << "tuple..." << std::endl; ) |
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186 | std::vector<ast::ptr<ast::Type>> types; |
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187 | size_t ncomponents; |
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188 | if ( !extractNumber(ncomponents) ) return nullptr; |
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189 | for ( size_t i = 0; i < ncomponents; ++i ) { |
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190 | if ( done() ) return nullptr; |
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191 | PRINT( std::cerr << "got ch: " << cur() << std::endl; ) |
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192 | ast::Type * t = parseType(); |
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193 | if ( !t ) return nullptr; |
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194 | PRINT( std::cerr << "with type : " << t << std::endl; ) |
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195 | types.push_back( t ); |
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196 | } |
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197 | return new ast::TupleType( std::move( types ), tq ); |
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198 | } |
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199 | |
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200 | ast::Type * Demangler::parsePointer( ast::CV::Qualifiers tq ) { |
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201 | PRINT( std::cerr << "pointer..." << std::endl; ) |
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202 | ast::Type * t = parseType(); |
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203 | if ( !t ) return nullptr; |
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204 | return new ast::PointerType( t, tq ); |
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205 | } |
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206 | |
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207 | ast::Type * Demangler::parseArray( ast::CV::Qualifiers tq ) { |
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208 | PRINT( std::cerr << "array..." << std::endl; ) |
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209 | size_t length; |
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210 | if ( !extractNumber(length) ) return nullptr; |
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211 | ast::Type * t = parseType(); |
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212 | if ( !t ) return nullptr; |
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213 | return new ast::ArrayType( |
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214 | t, |
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215 | ast::ConstantExpr::from_ulong( CodeLocation(), length ), |
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216 | ast::FixedLen, |
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217 | ast::DynamicDim, |
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218 | tq ); |
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219 | } |
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220 | |
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221 | ast::Type * Demangler::parseStruct( ast::CV::Qualifiers tq ) { |
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222 | PRINT( std::cerr << "struct..." << std::endl; ) |
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223 | std::string name; |
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224 | if ( !extractName(name) ) return nullptr; |
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225 | return new ast::StructInstType( name, tq ); |
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226 | } |
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227 | |
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228 | ast::Type * Demangler::parseUnion( ast::CV::Qualifiers tq ) { |
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229 | PRINT( std::cerr << "union..." << std::endl; ) |
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230 | std::string name; |
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231 | if ( !extractName(name) ) return nullptr; |
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232 | return new ast::UnionInstType( name, tq ); |
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233 | } |
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234 | |
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235 | ast::Type * Demangler::parseEnum( ast::CV::Qualifiers tq ) { |
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236 | PRINT( std::cerr << "enum..." << std::endl; ) |
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237 | std::string name; |
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238 | if ( !extractName(name) ) return nullptr; |
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239 | return new ast::EnumInstType( name, tq ); |
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240 | } |
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241 | |
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242 | ast::Type * Demangler::parseType( ast::CV::Qualifiers tq ) { |
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243 | PRINT( std::cerr << "type..." << std::endl; ) |
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244 | std::string name; |
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245 | if ( !extractName(name) ) return nullptr; |
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246 | PRINT( std::cerr << "typename..." << name << std::endl; ) |
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247 | return new ast::TypeInstType( name, ast::TypeDecl::Dtype, tq ); |
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248 | } |
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249 | |
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250 | ast::Type * Demangler::parseType() { |
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251 | if (done()) return nullptr; |
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252 | |
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253 | if (isPrefix(Encoding::forall)) { |
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254 | PRINT( std::cerr << "polymorphic with..." << std::endl; ) |
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255 | size_t dcount, fcount, vcount, acount; |
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256 | if ( !extractNumber(dcount) ) return nullptr; |
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257 | PRINT( std::cerr << dcount << " dtypes" << std::endl; ) |
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258 | if ( !expect('_') ) return nullptr; |
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259 | if ( !extractNumber(fcount) ) return nullptr; |
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260 | PRINT( std::cerr << fcount << " ftypes" << std::endl; ) |
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261 | if ( !expect('_')) return nullptr; |
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262 | if ( !extractNumber(vcount)) return nullptr; |
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263 | PRINT( std::cerr << vcount << " ttypes" << std::endl; ) |
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264 | if ( !expect('_') ) return nullptr; |
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265 | if ( !extractNumber(acount) ) return nullptr; |
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266 | PRINT( std::cerr << acount << " assertions" << std::endl; ) |
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267 | if ( !expect('_') ) return nullptr; |
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268 | for ( size_t i = 0 ; i < acount ; ++i ) { |
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269 | // TODO: need to recursively parse assertions, but for now just return nullptr so that |
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270 | // demangler does not crash if there are assertions |
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271 | return nullptr; |
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272 | } |
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273 | if ( !expect('_') ) return nullptr; |
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274 | } |
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275 | |
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276 | ast::CV::Qualifiers tq; |
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277 | while (true) { |
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278 | auto qual = std::find_if(Encoding::qualifiers.begin(), Encoding::qualifiers.end(), [this](decltype(Encoding::qualifiers)::value_type val) { |
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279 | return isPrefix(val.second); |
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280 | }); |
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281 | if (qual == Encoding::qualifiers.end()) break; |
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282 | tq |= qual->first; |
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283 | } |
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284 | |
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285 | // Find the correct type parser and then apply it. |
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286 | auto iter = std::find_if(parsers.begin(), parsers.end(), [this](std::pair<std::string, Parser> & p) { |
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287 | return isPrefix(p.first); |
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288 | }); |
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289 | assertf(iter != parsers.end(), "Unhandled type letter: %c at index: %zd", cur(), index); |
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290 | ast::Type * ret = iter->second(tq); |
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291 | if ( !ret ) return nullptr; |
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292 | return ret; |
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293 | } |
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294 | |
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295 | bool Demangler::parse( std::string & name, ast::Type *& type) { |
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296 | if ( !stripMangleName(name) ) return false; |
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297 | PRINT( std::cerr << "stripped name: " << name << std::endl; ) |
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298 | ast::Type * t = parseType(); |
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299 | if ( !t ) return false; |
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300 | type = t; |
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301 | return true; |
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302 | } |
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303 | |
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304 | std::string demangle( const std::string & mangleName ) { |
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305 | using namespace CodeGen; |
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306 | Demangler demangler( mangleName ); |
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307 | std::string name; |
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308 | ast::Type * type = nullptr; |
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309 | if ( !demangler.parse( name, type ) ) return mangleName; |
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310 | ast::readonly<ast::Type> roType = type; |
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311 | if ( auto info = operatorLookupByOutput( name ) ) name = info->inputName; |
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312 | return genType( type, name, Options( false, false, false, false ) ); |
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313 | } |
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314 | |
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315 | } // namespace |
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316 | |
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317 | } // namespace Mangle |
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318 | |
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319 | extern "C" { |
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320 | char * cforall_demangle(const char * mangleName, int option __attribute__((unused))) { |
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321 | const std::string & demangleName = Mangle::demangle(mangleName); |
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322 | return strdup(demangleName.c_str()); |
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323 | } |
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324 | } |
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325 | |
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326 | // Local Variables: // |
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327 | // tab-width: 4 // |
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328 | // mode: c++ // |
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329 | // compile-command: "make install" // |
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330 | // End: // |
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