1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 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 | // Indexer.cc -- |
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8 | // |
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9 | // Author : Richard C. Bilson |
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10 | // Created On : Sun May 17 21:37:33 2015 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Wed Mar 2 17:31:29 2016 |
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13 | // Update Count : 11 |
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14 | // |
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15 | |
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16 | #include "Indexer.h" |
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17 | |
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18 | #include "IdTable.h" |
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19 | #include "AggregateTable.h" |
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20 | #include "TypeTable.h" |
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21 | |
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22 | #include "SynTree/Declaration.h" |
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23 | #include "SynTree/Type.h" |
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24 | #include "SynTree/Expression.h" |
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25 | #include "SynTree/Initializer.h" |
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26 | #include "SynTree/Statement.h" |
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27 | |
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28 | #include <typeinfo> |
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29 | #include <utility> |
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30 | #include "Common/utility.h" |
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31 | |
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32 | #define debugPrint(x) if ( doDebug ) { std::cout << x; } |
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33 | |
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34 | namespace SymTab { |
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35 | template< typename Container, typename VisitorType > |
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36 | inline void acceptAllNewScope( Container &container, VisitorType &visitor ) { |
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37 | visitor.enterScope(); |
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38 | acceptAll( container, visitor ); |
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39 | visitor.leaveScope(); |
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40 | } |
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41 | |
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42 | struct Indexer::Impl { |
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43 | Impl() : refCount(1), size(0), base(), |
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44 | idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {} |
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45 | Impl( const Indexer &_base ) : refCount(1), size(0), base( _base ), |
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46 | idTable(), typeTable(), structTable(), enumTable(), unionTable(), traitTable() {} |
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47 | unsigned long refCount; ///< Number of references to these tables |
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48 | unsigned long size; ///< Number of elements stored in this table |
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49 | const Indexer base; ///< Base indexer this extends |
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50 | |
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51 | IdTable idTable; ///< Identifier namespace |
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52 | TypeTable typeTable; ///< Type namespace |
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53 | StructTable structTable; ///< Struct namespace |
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54 | EnumTable enumTable; ///< Enum namespace |
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55 | UnionTable unionTable; ///< Union namespace |
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56 | TraitTable traitTable; ///< Trait namespace |
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57 | }; |
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58 | |
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59 | Indexer::Impl *Indexer::newRef( Indexer::Impl *toClone ) { |
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60 | if ( ! toClone ) return 0; |
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61 | |
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62 | // shorten the search chain by skipping empty links |
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63 | Indexer::Impl *ret = toClone->size == 0 ? toClone->base.tables : toClone; |
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64 | if ( ret ) { ++ret->refCount; } |
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65 | |
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66 | return ret; |
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67 | } |
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68 | |
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69 | void Indexer::deleteRef( Indexer::Impl *toFree ) { |
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70 | if ( ! toFree ) return; |
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71 | |
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72 | if ( --toFree->refCount == 0 ) delete toFree; |
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73 | } |
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74 | |
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75 | void Indexer::makeWritable() { |
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76 | if ( ! tables ) { |
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77 | tables = new Indexer::Impl; |
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78 | } else if ( tables->refCount > 1 ) { |
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79 | // tables->base inherits the ref that used to belong to this indexer |
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80 | // this is basically equivalent to std::move( *this ) as the argument |
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81 | tables = new Indexer::Impl( Indexer( tables, doDebug ) ); |
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82 | } |
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83 | } |
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84 | |
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85 | Indexer::Indexer( bool _doDebug ) : tables(0), doDebug( _doDebug ) {} |
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86 | |
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87 | Indexer::Indexer( const Indexer &that ) : tables( newRef( that.tables ) ), doDebug( that.doDebug ) {} |
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88 | |
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89 | Indexer::Indexer( Indexer &&that ) : tables( that.tables ), doDebug( that.doDebug ) { |
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90 | that.tables = 0; |
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91 | } |
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92 | |
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93 | Indexer::~Indexer() { |
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94 | deleteRef( tables ); |
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95 | } |
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96 | |
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97 | Indexer& Indexer::operator= ( const Indexer &that ) { |
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98 | deleteRef( tables ); |
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99 | |
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100 | tables = newRef( that.tables ); |
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101 | doDebug = that.doDebug; |
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102 | |
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103 | return *this; |
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104 | } |
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105 | |
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106 | Indexer& Indexer::operator= ( Indexer &&that ) { |
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107 | deleteRef( tables ); |
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108 | |
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109 | tables = that.tables; |
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110 | doDebug = that.doDebug; |
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111 | |
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112 | that.tables = 0; |
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113 | |
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114 | return *this; |
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115 | } |
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116 | |
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117 | void Indexer::visit( ObjectDecl *objectDecl ) { |
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118 | enterScope(); |
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119 | maybeAccept( objectDecl->get_type(), *this ); |
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120 | leaveScope(); |
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121 | maybeAccept( objectDecl->get_init(), *this ); |
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122 | maybeAccept( objectDecl->get_bitfieldWidth(), *this ); |
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123 | if ( objectDecl->get_name() != "" ) { |
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124 | debugPrint( "Adding object " << objectDecl->get_name() << std::endl ); |
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125 | addId( objectDecl ); |
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126 | } // if |
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127 | } |
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128 | |
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129 | void Indexer::visit( FunctionDecl *functionDecl ) { |
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130 | if ( functionDecl->get_name() == "" ) return; |
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131 | debugPrint( "Adding function " << functionDecl->get_name() << std::endl ); |
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132 | addId( functionDecl ); |
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133 | enterScope(); |
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134 | maybeAccept( functionDecl->get_functionType(), *this ); |
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135 | acceptAll( functionDecl->get_oldDecls(), *this ); |
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136 | maybeAccept( functionDecl->get_statements(), *this ); |
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137 | leaveScope(); |
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138 | } |
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139 | |
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140 | |
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141 | // A NOTE ON THE ORDER OF TRAVERSAL |
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142 | // |
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143 | // Types and typedefs have their base types visited before they are added to the type table. This is ok, since there is |
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144 | // no such thing as a recursive type or typedef. |
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145 | // |
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146 | // typedef struct { T *x; } T; // never allowed |
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147 | // |
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148 | // for structs/unions, it is possible to have recursion, so the decl should be added as if it's incomplete to begin, the |
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149 | // members are traversed, and then the complete type should be added (assuming the type is completed by this particular |
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150 | // declaration). |
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151 | // |
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152 | // struct T { struct T *x; }; // allowed |
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153 | // |
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154 | // It is important to add the complete type to the symbol table *after* the members/base has been traversed, since that |
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155 | // traversal may modify the definition of the type and these modifications should be visible when the symbol table is |
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156 | // queried later in this pass. |
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157 | // |
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158 | // TODO: figure out whether recursive contexts are sensible/possible/reasonable. |
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159 | |
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160 | |
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161 | void Indexer::visit( TypeDecl *typeDecl ) { |
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162 | // see A NOTE ON THE ORDER OF TRAVERSAL, above |
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163 | // note that assertions come after the type is added to the symtab, since they are not part of the type proper |
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164 | // and may depend on the type itself |
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165 | enterScope(); |
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166 | acceptAll( typeDecl->get_parameters(), *this ); |
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167 | maybeAccept( typeDecl->get_base(), *this ); |
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168 | leaveScope(); |
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169 | debugPrint( "Adding type " << typeDecl->get_name() << std::endl ); |
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170 | addType( typeDecl ); |
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171 | acceptAll( typeDecl->get_assertions(), *this ); |
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172 | } |
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173 | |
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174 | void Indexer::visit( TypedefDecl *typeDecl ) { |
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175 | enterScope(); |
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176 | acceptAll( typeDecl->get_parameters(), *this ); |
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177 | maybeAccept( typeDecl->get_base(), *this ); |
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178 | leaveScope(); |
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179 | debugPrint( "Adding typedef " << typeDecl->get_name() << std::endl ); |
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180 | addType( typeDecl ); |
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181 | } |
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182 | |
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183 | void Indexer::visit( StructDecl *aggregateDecl ) { |
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184 | // make up a forward declaration and add it before processing the members |
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185 | StructDecl fwdDecl( aggregateDecl->get_name() ); |
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186 | cloneAll( aggregateDecl->get_parameters(), fwdDecl.get_parameters() ); |
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187 | debugPrint( "Adding fwd decl for struct " << fwdDecl.get_name() << std::endl ); |
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188 | addStruct( &fwdDecl ); |
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189 | |
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190 | enterScope(); |
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191 | acceptAll( aggregateDecl->get_parameters(), *this ); |
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192 | acceptAll( aggregateDecl->get_members(), *this ); |
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193 | leaveScope(); |
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194 | |
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195 | debugPrint( "Adding struct " << aggregateDecl->get_name() << std::endl ); |
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196 | // this addition replaces the forward declaration |
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197 | addStruct( aggregateDecl ); |
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198 | } |
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199 | |
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200 | void Indexer::visit( UnionDecl *aggregateDecl ) { |
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201 | // make up a forward declaration and add it before processing the members |
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202 | UnionDecl fwdDecl( aggregateDecl->get_name() ); |
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203 | cloneAll( aggregateDecl->get_parameters(), fwdDecl.get_parameters() ); |
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204 | debugPrint( "Adding fwd decl for union " << fwdDecl.get_name() << std::endl ); |
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205 | addUnion( &fwdDecl ); |
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206 | |
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207 | enterScope(); |
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208 | acceptAll( aggregateDecl->get_parameters(), *this ); |
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209 | acceptAll( aggregateDecl->get_members(), *this ); |
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210 | leaveScope(); |
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211 | |
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212 | debugPrint( "Adding union " << aggregateDecl->get_name() << std::endl ); |
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213 | addUnion( aggregateDecl ); |
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214 | } |
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215 | |
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216 | void Indexer::visit( EnumDecl *aggregateDecl ) { |
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217 | debugPrint( "Adding enum " << aggregateDecl->get_name() << std::endl ); |
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218 | addEnum( aggregateDecl ); |
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219 | // unlike structs, contexts, and unions, enums inject their members into the global scope |
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220 | acceptAll( aggregateDecl->get_members(), *this ); |
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221 | } |
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222 | |
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223 | void Indexer::visit( TraitDecl *aggregateDecl ) { |
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224 | enterScope(); |
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225 | acceptAll( aggregateDecl->get_parameters(), *this ); |
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226 | acceptAll( aggregateDecl->get_members(), *this ); |
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227 | leaveScope(); |
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228 | |
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229 | debugPrint( "Adding context " << aggregateDecl->get_name() << std::endl ); |
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230 | addTrait( aggregateDecl ); |
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231 | } |
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232 | |
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233 | void Indexer::visit( CompoundStmt *compoundStmt ) { |
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234 | enterScope(); |
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235 | acceptAll( compoundStmt->get_kids(), *this ); |
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236 | leaveScope(); |
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237 | } |
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238 | |
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239 | |
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240 | void Indexer::visit( ApplicationExpr *applicationExpr ) { |
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241 | acceptAllNewScope( applicationExpr->get_results(), *this ); |
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242 | maybeAccept( applicationExpr->get_function(), *this ); |
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243 | acceptAll( applicationExpr->get_args(), *this ); |
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244 | } |
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245 | |
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246 | void Indexer::visit( UntypedExpr *untypedExpr ) { |
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247 | acceptAllNewScope( untypedExpr->get_results(), *this ); |
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248 | acceptAll( untypedExpr->get_args(), *this ); |
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249 | } |
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250 | |
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251 | void Indexer::visit( NameExpr *nameExpr ) { |
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252 | acceptAllNewScope( nameExpr->get_results(), *this ); |
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253 | } |
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254 | |
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255 | void Indexer::visit( AddressExpr *addressExpr ) { |
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256 | acceptAllNewScope( addressExpr->get_results(), *this ); |
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257 | maybeAccept( addressExpr->get_arg(), *this ); |
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258 | } |
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259 | |
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260 | void Indexer::visit( LabelAddressExpr *labAddressExpr ) { |
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261 | acceptAllNewScope( labAddressExpr->get_results(), *this ); |
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262 | maybeAccept( labAddressExpr->get_arg(), *this ); |
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263 | } |
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264 | |
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265 | void Indexer::visit( CastExpr *castExpr ) { |
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266 | acceptAllNewScope( castExpr->get_results(), *this ); |
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267 | maybeAccept( castExpr->get_arg(), *this ); |
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268 | } |
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269 | |
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270 | void Indexer::visit( UntypedMemberExpr *memberExpr ) { |
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271 | acceptAllNewScope( memberExpr->get_results(), *this ); |
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272 | maybeAccept( memberExpr->get_aggregate(), *this ); |
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273 | } |
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274 | |
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275 | void Indexer::visit( MemberExpr *memberExpr ) { |
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276 | acceptAllNewScope( memberExpr->get_results(), *this ); |
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277 | maybeAccept( memberExpr->get_aggregate(), *this ); |
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278 | } |
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279 | |
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280 | void Indexer::visit( VariableExpr *variableExpr ) { |
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281 | acceptAllNewScope( variableExpr->get_results(), *this ); |
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282 | } |
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283 | |
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284 | void Indexer::visit( ConstantExpr *constantExpr ) { |
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285 | acceptAllNewScope( constantExpr->get_results(), *this ); |
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286 | maybeAccept( constantExpr->get_constant(), *this ); |
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287 | } |
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288 | |
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289 | void Indexer::visit( SizeofExpr *sizeofExpr ) { |
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290 | acceptAllNewScope( sizeofExpr->get_results(), *this ); |
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291 | if ( sizeofExpr->get_isType() ) { |
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292 | maybeAccept( sizeofExpr->get_type(), *this ); |
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293 | } else { |
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294 | maybeAccept( sizeofExpr->get_expr(), *this ); |
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295 | } |
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296 | } |
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297 | |
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298 | void Indexer::visit( AlignofExpr *alignofExpr ) { |
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299 | acceptAllNewScope( alignofExpr->get_results(), *this ); |
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300 | if ( alignofExpr->get_isType() ) { |
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301 | maybeAccept( alignofExpr->get_type(), *this ); |
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302 | } else { |
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303 | maybeAccept( alignofExpr->get_expr(), *this ); |
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304 | } |
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305 | } |
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306 | |
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307 | void Indexer::visit( UntypedOffsetofExpr *offsetofExpr ) { |
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308 | acceptAllNewScope( offsetofExpr->get_results(), *this ); |
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309 | maybeAccept( offsetofExpr->get_type(), *this ); |
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310 | } |
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311 | |
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312 | void Indexer::visit( OffsetofExpr *offsetofExpr ) { |
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313 | acceptAllNewScope( offsetofExpr->get_results(), *this ); |
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314 | maybeAccept( offsetofExpr->get_type(), *this ); |
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315 | maybeAccept( offsetofExpr->get_member(), *this ); |
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316 | } |
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317 | |
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318 | void Indexer::visit( AttrExpr *attrExpr ) { |
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319 | acceptAllNewScope( attrExpr->get_results(), *this ); |
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320 | if ( attrExpr->get_isType() ) { |
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321 | maybeAccept( attrExpr->get_type(), *this ); |
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322 | } else { |
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323 | maybeAccept( attrExpr->get_expr(), *this ); |
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324 | } |
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325 | } |
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326 | |
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327 | void Indexer::visit( LogicalExpr *logicalExpr ) { |
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328 | acceptAllNewScope( logicalExpr->get_results(), *this ); |
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329 | maybeAccept( logicalExpr->get_arg1(), *this ); |
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330 | maybeAccept( logicalExpr->get_arg2(), *this ); |
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331 | } |
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332 | |
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333 | void Indexer::visit( ConditionalExpr *conditionalExpr ) { |
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334 | acceptAllNewScope( conditionalExpr->get_results(), *this ); |
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335 | maybeAccept( conditionalExpr->get_arg1(), *this ); |
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336 | maybeAccept( conditionalExpr->get_arg2(), *this ); |
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337 | maybeAccept( conditionalExpr->get_arg3(), *this ); |
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338 | } |
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339 | |
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340 | void Indexer::visit( CommaExpr *commaExpr ) { |
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341 | acceptAllNewScope( commaExpr->get_results(), *this ); |
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342 | maybeAccept( commaExpr->get_arg1(), *this ); |
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343 | maybeAccept( commaExpr->get_arg2(), *this ); |
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344 | } |
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345 | |
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346 | void Indexer::visit( TupleExpr *tupleExpr ) { |
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347 | acceptAllNewScope( tupleExpr->get_results(), *this ); |
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348 | acceptAll( tupleExpr->get_exprs(), *this ); |
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349 | } |
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350 | |
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351 | void Indexer::visit( SolvedTupleExpr *tupleExpr ) { |
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352 | acceptAllNewScope( tupleExpr->get_results(), *this ); |
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353 | acceptAll( tupleExpr->get_exprs(), *this ); |
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354 | } |
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355 | |
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356 | void Indexer::visit( TypeExpr *typeExpr ) { |
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357 | acceptAllNewScope( typeExpr->get_results(), *this ); |
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358 | maybeAccept( typeExpr->get_type(), *this ); |
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359 | } |
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360 | |
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361 | void Indexer::visit( AsmExpr *asmExpr ) { |
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362 | maybeAccept( asmExpr->get_inout(), *this ); |
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363 | maybeAccept( asmExpr->get_constraint(), *this ); |
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364 | maybeAccept( asmExpr->get_operand(), *this ); |
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365 | } |
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366 | |
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367 | void Indexer::visit( UntypedValofExpr *valofExpr ) { |
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368 | acceptAllNewScope( valofExpr->get_results(), *this ); |
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369 | maybeAccept( valofExpr->get_body(), *this ); |
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370 | } |
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371 | |
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372 | |
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373 | void Indexer::visit( TraitInstType *contextInst ) { |
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374 | acceptAll( contextInst->get_parameters(), *this ); |
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375 | acceptAll( contextInst->get_members(), *this ); |
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376 | } |
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377 | |
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378 | void Indexer::visit( StructInstType *structInst ) { |
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379 | if ( ! lookupStruct( structInst->get_name() ) ) { |
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380 | debugPrint( "Adding struct " << structInst->get_name() << " from implicit forward declaration" << std::endl ); |
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381 | addStruct( structInst->get_name() ); |
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382 | } |
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383 | enterScope(); |
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384 | acceptAll( structInst->get_parameters(), *this ); |
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385 | leaveScope(); |
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386 | } |
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387 | |
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388 | void Indexer::visit( UnionInstType *unionInst ) { |
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389 | if ( ! lookupUnion( unionInst->get_name() ) ) { |
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390 | debugPrint( "Adding union " << unionInst->get_name() << " from implicit forward declaration" << std::endl ); |
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391 | addUnion( unionInst->get_name() ); |
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392 | } |
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393 | enterScope(); |
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394 | acceptAll( unionInst->get_parameters(), *this ); |
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395 | leaveScope(); |
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396 | } |
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397 | |
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398 | void Indexer::visit( ForStmt *forStmt ) { |
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399 | // for statements introduce a level of scope |
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400 | enterScope(); |
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401 | Visitor::visit( forStmt ); |
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402 | leaveScope(); |
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403 | } |
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404 | |
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405 | |
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406 | void Indexer::lookupId( const std::string &id, std::list< DeclarationWithType* > &list ) const { |
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407 | if ( ! tables ) return; |
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408 | |
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409 | tables->idTable.lookupId( id, list ); |
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410 | tables->base.lookupId( id, list ); |
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411 | } |
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412 | |
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413 | DeclarationWithType* Indexer::lookupId( const std::string &id) const { |
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414 | if ( ! tables ) return 0; |
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415 | |
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416 | DeclarationWithType *ret = tables->idTable.lookupId(id); |
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417 | return ret ? ret : tables->base.lookupId(id); |
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418 | } |
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419 | |
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420 | NamedTypeDecl *Indexer::lookupType( const std::string &id ) const { |
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421 | if ( ! tables ) return 0; |
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422 | |
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423 | NamedTypeDecl *ret = tables->typeTable.lookup( id ); |
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424 | return ret ? ret : tables->base.lookupType( id ); |
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425 | } |
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426 | |
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427 | StructDecl *Indexer::lookupStruct( const std::string &id ) const { |
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428 | if ( ! tables ) return 0; |
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429 | |
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430 | StructDecl *ret = tables->structTable.lookup( id ); |
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431 | return ret ? ret : tables->base.lookupStruct( id ); |
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432 | } |
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433 | |
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434 | EnumDecl *Indexer::lookupEnum( const std::string &id ) const { |
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435 | if ( ! tables ) return 0; |
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436 | |
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437 | EnumDecl *ret = tables->enumTable.lookup( id ); |
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438 | return ret ? ret : tables->base.lookupEnum( id ); |
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439 | } |
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440 | |
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441 | UnionDecl *Indexer::lookupUnion( const std::string &id ) const { |
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442 | if ( ! tables ) return 0; |
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443 | |
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444 | UnionDecl *ret = tables->unionTable.lookup( id ); |
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445 | return ret ? ret : tables->base.lookupUnion( id ); |
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446 | } |
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447 | |
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448 | TraitDecl *Indexer::lookupTrait( const std::string &id ) const { |
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449 | if ( ! tables ) return 0; |
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450 | |
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451 | TraitDecl *ret = tables->traitTable.lookup( id ); |
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452 | return ret ? ret : tables->base.lookupTrait( id ); |
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453 | } |
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454 | |
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455 | void Indexer::addId( DeclarationWithType *decl ) { |
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456 | makeWritable(); |
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457 | tables->idTable.addDecl( decl ); |
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458 | ++tables->size; |
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459 | } |
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460 | |
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461 | void Indexer::addType( NamedTypeDecl *decl ) { |
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462 | makeWritable(); |
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463 | tables->typeTable.add( decl ); |
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464 | ++tables->size; |
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465 | } |
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466 | |
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467 | void Indexer::addStruct( const std::string &id ) { |
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468 | makeWritable(); |
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469 | tables->structTable.add( id ); |
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470 | ++tables->size; |
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471 | } |
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472 | |
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473 | void Indexer::addStruct( StructDecl *decl ) { |
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474 | makeWritable(); |
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475 | tables->structTable.add( decl ); |
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476 | ++tables->size; |
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477 | } |
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478 | |
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479 | void Indexer::addEnum( EnumDecl *decl ) { |
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480 | makeWritable(); |
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481 | tables->enumTable.add( decl ); |
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482 | ++tables->size; |
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483 | } |
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484 | |
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485 | void Indexer::addUnion( const std::string &id ) { |
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486 | makeWritable(); |
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487 | tables->unionTable.add( id ); |
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488 | ++tables->size; |
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489 | } |
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490 | |
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491 | void Indexer::addUnion( UnionDecl *decl ) { |
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492 | makeWritable(); |
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493 | tables->unionTable.add( decl ); |
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494 | ++tables->size; |
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495 | } |
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496 | |
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497 | void Indexer::addTrait( TraitDecl *decl ) { |
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498 | makeWritable(); |
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499 | tables->traitTable.add( decl ); |
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500 | ++tables->size; |
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501 | } |
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502 | |
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503 | void Indexer::enterScope() { |
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504 | makeWritable(); |
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505 | |
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506 | if ( doDebug ) { |
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507 | std::cout << "--- Entering scope" << std::endl; |
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508 | } |
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509 | |
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510 | tables->idTable.enterScope(); |
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511 | tables->typeTable.enterScope(); |
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512 | tables->structTable.enterScope(); |
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513 | tables->enumTable.enterScope(); |
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514 | tables->unionTable.enterScope(); |
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515 | tables->traitTable.enterScope(); |
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516 | } |
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517 | |
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518 | void Indexer::leaveScope() { |
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519 | using std::cout; |
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520 | |
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521 | makeWritable(); |
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522 | |
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523 | if ( doDebug ) { |
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524 | cout << "--- Leaving scope containing" << std::endl; |
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525 | tables->idTable.dump( cout ); |
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526 | tables->typeTable.dump( cout ); |
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527 | tables->structTable.dump( cout ); |
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528 | tables->enumTable.dump( cout ); |
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529 | tables->unionTable.dump( cout ); |
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530 | tables->traitTable.dump( cout ); |
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531 | } |
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532 | tables->idTable.leaveScope(); |
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533 | tables->typeTable.leaveScope(); |
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534 | tables->structTable.leaveScope(); |
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535 | tables->enumTable.leaveScope(); |
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536 | tables->unionTable.leaveScope(); |
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537 | tables->traitTable.leaveScope(); |
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538 | } |
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539 | |
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540 | void Indexer::print( std::ostream &os, int indent ) const { |
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541 | using std::cerr; |
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542 | |
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543 | cerr << "===idTable===" << std::endl; |
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544 | if ( tables ) tables->idTable.dump( os ); |
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545 | cerr << "===typeTable===" << std::endl; |
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546 | if ( tables ) tables->typeTable.dump( os ); |
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547 | cerr << "===structTable===" << std::endl; |
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548 | if ( tables ) tables->structTable.dump( os ); |
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549 | cerr << "===enumTable===" << std::endl; |
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550 | if ( tables ) tables->enumTable.dump( os ); |
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551 | cerr << "===unionTable===" << std::endl; |
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552 | if ( tables ) tables->unionTable.dump( os ); |
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553 | cerr << "===contextTable===" << std::endl; |
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554 | if ( tables ) tables->traitTable.dump( os ); |
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555 | } |
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556 | } // namespace SymTab |
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557 | |
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558 | // Local Variables: // |
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559 | // tab-width: 4 // |
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560 | // mode: c++ // |
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561 | // compile-command: "make install" // |
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562 | // End: // |
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