1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2016 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 | // ExceptDecl.cc -- |
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8 | // |
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9 | // Author : Henry Xue |
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10 | // Created On : Tue Jul 20 04:10:50 2021 |
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11 | // Last Modified By : Henry Xue |
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12 | // Last Modified On : Thu Jul 22 10:40:55 2021 |
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13 | // Update Count : 2 |
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14 | // |
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15 | |
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16 | #include "ExceptDecl.h" |
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17 | |
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18 | #include "Common/PassVisitor.h" // for PassVisitor |
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19 | #include "SynTree/Mutator.h" // for mutateAll |
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20 | #include "Virtual/Tables.h" // for helpers |
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21 | |
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22 | namespace ControlStruct { |
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23 | |
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24 | StructDecl * ehmTypeIdStruct( const std::string & exceptionName, std::list< TypeDecl *> * parameters ) { |
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25 | StructDecl * structDecl = new StructDecl( Virtual::typeIdType( exceptionName ) ); |
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26 | structDecl->members.push_back( new ObjectDecl( |
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27 | "parent", |
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28 | noStorageClasses, |
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29 | LinkageSpec::Cforall, |
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30 | nullptr, |
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31 | new PointerType( noQualifiers, |
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32 | new TypeInstType( Type::Const, "__cfavir_type_info", false ) ), |
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33 | nullptr |
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34 | ) ); |
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35 | structDecl->set_body( true ); |
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36 | if ( parameters ) { |
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37 | structDecl->parameters = *parameters; |
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38 | } |
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39 | return structDecl; |
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40 | } |
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41 | |
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42 | ObjectDecl * ehmTypeIdValue( const std::string & exceptionName, std::list< Expression *> * parameters ) { |
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43 | StructInstType * structInstType = new StructInstType( Type::Const, Virtual::typeIdType( exceptionName ) ); |
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44 | if ( parameters ) { |
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45 | structInstType->parameters = *parameters; |
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46 | } |
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47 | return new ObjectDecl( |
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48 | Virtual::typeIdName( exceptionName ), |
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49 | noStorageClasses, |
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50 | LinkageSpec::Cforall, |
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51 | nullptr, |
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52 | structInstType, |
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53 | new ListInit( { new SingleInit( |
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54 | new AddressExpr( new NameExpr( "__cfatid_exception_t" ) ) |
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55 | ) }, {}, true ), |
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56 | { new Attribute( "cfa_linkonce" ) } |
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57 | ); |
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58 | } |
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59 | |
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60 | StructDecl * ehmExceptionStructDecl( const std::string & exceptionName, std::list< TypeDecl *> * parameters ) { |
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61 | StructDecl * structDecl = new StructDecl( exceptionName ); |
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62 | if ( parameters ) { |
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63 | structDecl->parameters = *parameters; |
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64 | } |
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65 | return structDecl; |
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66 | } |
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67 | |
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68 | StructDecl * ehmVirtualTableStruct( const std::string & exceptionName, std::list< TypeDecl *> * parameters ) { |
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69 | // _EHM_TYPE_ID_TYPE(exception_name) parameters const * __cfavir_typeid; |
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70 | ObjectDecl * typeId = new ObjectDecl( |
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71 | "__cfavir_typeid", |
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72 | noStorageClasses, |
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73 | LinkageSpec::Cforall, |
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74 | nullptr, |
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75 | new PointerType( noQualifiers, |
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76 | new StructInstType( Type::Const, Virtual::typeIdType( exceptionName ) ) ), |
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77 | nullptr |
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78 | ); |
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79 | |
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80 | // size_t size; |
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81 | ObjectDecl * size = new ObjectDecl( |
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82 | "size", |
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83 | noStorageClasses, |
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84 | LinkageSpec::Cforall, |
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85 | nullptr, |
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86 | new TypeInstType( noQualifiers, "size_t", false ), |
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87 | nullptr |
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88 | ); |
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89 | |
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90 | // void (*copy)(exception_name parameters * this, exception_name parameters * other); |
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91 | FunctionType * copyFnType = new FunctionType( noQualifiers, false ); |
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92 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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93 | "this", |
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94 | noStorageClasses, |
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95 | LinkageSpec::Cforall, |
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96 | nullptr, |
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97 | new PointerType( noQualifiers, |
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98 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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99 | nullptr |
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100 | ) ); |
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101 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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102 | "other", |
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103 | noStorageClasses, |
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104 | LinkageSpec::Cforall, |
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105 | nullptr, |
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106 | new PointerType( noQualifiers, |
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107 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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108 | nullptr |
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109 | ) ); |
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110 | copyFnType->get_returnVals().push_back( new ObjectDecl( |
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111 | "", |
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112 | noStorageClasses, |
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113 | LinkageSpec::Cforall, |
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114 | nullptr, |
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115 | new VoidType( noQualifiers ), |
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116 | nullptr |
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117 | ) ); |
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118 | ObjectDecl * copy = new ObjectDecl( |
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119 | "copy", |
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120 | noStorageClasses, |
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121 | LinkageSpec::Cforall, |
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122 | nullptr, |
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123 | new PointerType( noQualifiers, copyFnType ), |
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124 | nullptr |
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125 | ); |
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126 | |
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127 | // void (*^?{})(exception_name parameters & this); |
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128 | FunctionType * dtorFnType = new FunctionType( noQualifiers, false ); |
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129 | dtorFnType->get_parameters().push_back( new ObjectDecl( |
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130 | "this", |
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131 | noStorageClasses, |
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132 | LinkageSpec::Cforall, |
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133 | nullptr, |
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134 | new ReferenceType( noQualifiers, |
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135 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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136 | nullptr |
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137 | ) ); |
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138 | dtorFnType->get_returnVals().push_back( new ObjectDecl( |
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139 | "", |
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140 | noStorageClasses, |
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141 | LinkageSpec::Cforall, |
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142 | nullptr, |
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143 | new VoidType( noQualifiers ), |
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144 | nullptr |
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145 | ) ); |
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146 | ObjectDecl * dtor = new ObjectDecl( |
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147 | "^?{}", |
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148 | noStorageClasses, |
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149 | LinkageSpec::Cforall, |
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150 | nullptr, |
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151 | new PointerType( noQualifiers, dtorFnType ), |
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152 | nullptr |
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153 | ); |
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154 | |
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155 | // const char * (*msg)(exception_name parameters * this); |
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156 | FunctionType * msgFnType = new FunctionType( noQualifiers, false ); |
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157 | msgFnType->get_parameters().push_back( new ObjectDecl( |
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158 | "this", |
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159 | noStorageClasses, |
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160 | LinkageSpec::Cforall, |
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161 | nullptr, |
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162 | new PointerType( noQualifiers, |
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163 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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164 | nullptr |
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165 | ) ); |
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166 | msgFnType->get_returnVals().push_back( new ObjectDecl( |
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167 | "", |
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168 | noStorageClasses, |
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169 | LinkageSpec::Cforall, |
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170 | nullptr, |
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171 | new PointerType( noQualifiers, new BasicType( Type::Const, BasicType::Char ) ), |
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172 | nullptr |
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173 | ) ); |
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174 | ObjectDecl * msg = new ObjectDecl( |
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175 | "msg", |
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176 | noStorageClasses, |
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177 | LinkageSpec::Cforall, |
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178 | nullptr, |
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179 | new PointerType( noQualifiers, msgFnType ), |
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180 | nullptr |
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181 | ); |
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182 | |
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183 | StructDecl * structDecl = new StructDecl( Virtual::vtableTypeName( exceptionName ) ); |
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184 | structDecl->members.push_back( typeId ); |
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185 | structDecl->members.push_back( size ); |
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186 | structDecl->members.push_back( copy ); |
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187 | structDecl->members.push_back( dtor ); |
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188 | structDecl->members.push_back( msg ); |
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189 | structDecl->set_body( true ); |
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190 | if ( parameters ) { |
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191 | structDecl->parameters = *parameters; |
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192 | } |
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193 | return structDecl; |
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194 | } |
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195 | |
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196 | StructDecl * ehmExceptionStruct( const std::string & exceptionName, const std::list<Declaration*> & members, |
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197 | std::list<TypeDecl *> * parameters ) { |
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198 | StructDecl * structDecl = new StructDecl( exceptionName ); |
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199 | structDecl->members = members; |
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200 | structDecl->members.push_front( new ObjectDecl( |
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201 | "virtual_table", |
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202 | noStorageClasses, |
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203 | LinkageSpec::Cforall, |
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204 | nullptr, |
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205 | new PointerType( noQualifiers, |
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206 | new StructInstType( Type::Const, Virtual::vtableTypeName( exceptionName ) ) ), |
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207 | nullptr |
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208 | ) ); |
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209 | structDecl->set_body( true ); |
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210 | if ( parameters ) { |
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211 | structDecl->parameters = *parameters; |
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212 | } |
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213 | return structDecl; |
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214 | } |
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215 | |
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216 | ObjectDecl * ehmExternVtable( const std::string & exceptionName, const std::string & tableName, |
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217 | std::list< Expression *> * parameters ) { |
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218 | StructInstType * structInstType = new StructInstType( Type::Const, Virtual::vtableTypeName(exceptionName) ); |
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219 | if ( parameters ) { |
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220 | structInstType->parameters = *parameters; |
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221 | } |
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222 | return new ObjectDecl( |
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223 | tableName, |
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224 | Type::Extern, |
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225 | LinkageSpec::Cforall, |
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226 | nullptr, |
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227 | structInstType, |
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228 | nullptr |
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229 | ); |
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230 | } |
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231 | |
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232 | FunctionDecl * ehmDefineCopy( const std::string & exceptionName ) { |
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233 | FunctionType * copyFnType = new FunctionType( noQualifiers, false ); |
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234 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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235 | "this", |
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236 | noStorageClasses, |
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237 | LinkageSpec::Cforall, |
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238 | nullptr, |
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239 | new PointerType( noQualifiers, |
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240 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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241 | nullptr |
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242 | ) ); |
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243 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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244 | "that", |
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245 | noStorageClasses, |
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246 | LinkageSpec::Cforall, |
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247 | nullptr, |
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248 | new PointerType( noQualifiers, |
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249 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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250 | nullptr |
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251 | ) ); |
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252 | copyFnType->get_returnVals().push_back( new ObjectDecl( |
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253 | "", |
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254 | noStorageClasses, |
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255 | LinkageSpec::Cforall, |
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256 | nullptr, |
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257 | new VoidType( noQualifiers ), |
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258 | nullptr |
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259 | ) ); |
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260 | return new FunctionDecl( |
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261 | "copy", |
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262 | noStorageClasses, |
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263 | LinkageSpec::Cforall, |
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264 | copyFnType, |
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265 | new CompoundStmt( { |
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266 | new ExprStmt( new UntypedExpr( new NameExpr( "?=?" ), { |
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267 | new UntypedExpr( new NameExpr( "*?" ), { new NameExpr( "this" ) } ), |
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268 | new UntypedExpr( new NameExpr( "*?" ), { new NameExpr( "that" ) } ) |
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269 | } ) ) |
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270 | } ) |
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271 | ); |
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272 | } |
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273 | |
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274 | FunctionDecl * ehmDefineMsg( const std::string & exceptionName ) { |
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275 | FunctionType * msgFnType = new FunctionType( noQualifiers, false ); |
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276 | msgFnType->get_parameters().push_back( new ObjectDecl( |
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277 | "this", |
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278 | noStorageClasses, |
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279 | LinkageSpec::Cforall, |
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280 | nullptr, |
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281 | new PointerType( noQualifiers, |
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282 | new TypeInstType( noQualifiers, exceptionName, false ) ), |
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283 | nullptr |
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284 | ) ); |
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285 | msgFnType->get_returnVals().push_back( new ObjectDecl( |
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286 | "", |
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287 | noStorageClasses, |
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288 | LinkageSpec::Cforall, |
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289 | nullptr, |
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290 | new PointerType( noQualifiers, new BasicType( Type::Const, BasicType::Char ) ), |
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291 | nullptr |
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292 | ) ); |
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293 | return new FunctionDecl( |
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294 | "msg", |
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295 | noStorageClasses, |
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296 | LinkageSpec::Cforall, |
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297 | msgFnType, |
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298 | new CompoundStmt( { |
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299 | new ReturnStmt( new ConstantExpr( Constant::from_string( exceptionName ) ) ) |
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300 | } ) |
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301 | ); |
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302 | } |
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303 | |
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304 | ObjectDecl * ehmVirtualTable( const std::string & exceptionName, const std::string & tableName ) { |
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305 | std::list< Initializer *> inits { |
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306 | new SingleInit( new AddressExpr( |
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307 | new NameExpr( Virtual::typeIdName( exceptionName ) ) ) ), |
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308 | new SingleInit( new SizeofExpr( |
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309 | new StructInstType( noQualifiers, exceptionName ) ) ), |
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310 | new SingleInit( new NameExpr( "copy" ) ), |
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311 | new SingleInit( new NameExpr( "^?{}" ) ), |
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312 | new SingleInit( new NameExpr( "msg" ) ) |
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313 | }; |
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314 | std::list< Designation *> desig { |
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315 | new Designation( { new NameExpr( "__cfavir_typeid" ) } ), |
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316 | new Designation( { new NameExpr( "size" ) } ), |
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317 | new Designation( { new NameExpr( "copy" ) } ), |
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318 | new Designation( { new NameExpr( "^?{}" ) } ), |
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319 | new Designation( { new NameExpr( "msg" ) } ) |
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320 | }; |
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321 | return new ObjectDecl( |
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322 | tableName, |
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323 | noStorageClasses, |
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324 | LinkageSpec::Cforall, |
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325 | nullptr, |
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326 | new StructInstType( Type::Const, Virtual::vtableTypeName( exceptionName ) ), |
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327 | new ListInit( inits, desig ) |
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328 | ); |
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329 | } |
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330 | |
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331 | class ExceptDeclCore : public WithDeclsToAdd { |
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332 | public: |
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333 | Declaration * postmutate( StructDecl * structDecl ); // translates exception decls |
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334 | DeclarationWithType * postmutate( ObjectDecl * objectDecl ); // translates vtable decls |
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335 | }; |
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336 | |
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337 | Declaration * ExceptDeclCore::postmutate( StructDecl * structDecl ) { |
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338 | if ( structDecl->is_exception() ) { |
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339 | const std::string & exceptionName = structDecl->get_name(); |
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340 | declsToAddBefore.push_back( ehmTypeIdStruct( exceptionName, nullptr ) ); |
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341 | declsToAddBefore.push_back( ehmTypeIdValue( exceptionName, nullptr ) ); |
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342 | declsToAddBefore.push_back( ehmExceptionStructDecl( exceptionName, nullptr ) ); |
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343 | declsToAddBefore.push_back( ehmVirtualTableStruct( exceptionName, nullptr ) ); |
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344 | return ehmExceptionStruct( exceptionName, structDecl->get_members(), nullptr ); |
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345 | } |
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346 | return structDecl; |
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347 | } |
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348 | |
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349 | DeclarationWithType * ExceptDeclCore::postmutate( ObjectDecl * objectDecl ) { |
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350 | // Check if it is VTableType |
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351 | VTableType * vtableType = dynamic_cast< VTableType *>( objectDecl->get_type() ); |
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352 | if ( vtableType ) { |
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353 | TypeInstType * base = dynamic_cast< TypeInstType *>( vtableType->get_base() ); |
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354 | assert( base ); // should be a TypeInstType |
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355 | const std::string & exceptionName = base->get_name(); |
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356 | const std::string & tableName = objectDecl->get_name(); |
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357 | if ( objectDecl->get_storageClasses().is_extern ) { |
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358 | return ehmExternVtable( exceptionName, tableName, nullptr ); |
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359 | } else { |
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360 | declsToAddBefore.push_back( ehmDefineCopy( exceptionName ) ); |
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361 | declsToAddBefore.push_back( ehmDefineMsg( exceptionName ) ); |
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362 | return ehmVirtualTable( exceptionName, tableName ); |
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363 | } |
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364 | } |
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365 | return objectDecl; |
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366 | } |
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367 | |
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368 | void translateExcept( std::list< Declaration *> & translationUnit ) { |
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369 | PassVisitor<ExceptDeclCore> translator; |
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370 | mutateAll( translationUnit, translator ); |
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371 | } |
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372 | |
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373 | } |
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