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 : Andrew Beach |
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12 | // Last Modified On : Wed May 25 16:43:00 2022 |
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13 | // Update Count : 5 |
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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 <cassert> // for assert |
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19 | #include <string> // for string |
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20 | #include <sstream> // for stringstream |
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21 | |
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22 | #include "Common/PassVisitor.h" // for PassVisitor |
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23 | #include "Common/utility.h" // for cloneAll |
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24 | #include "SynTree/Mutator.h" // for mutateAll |
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25 | #include "Virtual/Tables.h" // for helpers |
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26 | |
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27 | namespace ControlStruct { |
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28 | |
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29 | const std::list< Expression *> & makeParameters( |
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30 | const std::list< TypeDecl *> & forallClause |
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31 | ) { |
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32 | auto parameters = new std::list< Expression *>(); |
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33 | for ( auto it = forallClause.begin(); it != forallClause.end(); it++ ) { |
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34 | parameters->emplace_back( new TypeExpr( |
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35 | new TypeInstType( noQualifiers, ( *it )->get_name(), false ) |
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36 | ) ); |
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37 | } |
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38 | return *parameters; |
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39 | } |
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40 | |
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41 | StructInstType * makeExceptInstType( |
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42 | const std::string & exceptionName, |
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43 | const std::list< Expression *> & parameters |
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44 | ) { |
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45 | StructInstType * exceptInstType = new StructInstType( |
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46 | noQualifiers, |
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47 | exceptionName |
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48 | ); |
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49 | cloneAll( parameters, exceptInstType->parameters ); |
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50 | return exceptInstType; |
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51 | } |
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52 | |
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53 | // void (*copy)(exception_name parameters * this, exception_name parameters * that); |
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54 | FunctionType * makeCopyFnType( |
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55 | const std::string & exceptionName, |
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56 | const std::list< Expression *> & parameters |
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57 | ) { |
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58 | FunctionType * copyFnType = new FunctionType( noQualifiers, false ); |
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59 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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60 | "this", |
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61 | noStorageClasses, |
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62 | LinkageSpec::Cforall, |
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63 | nullptr, |
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64 | new PointerType( noQualifiers, |
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65 | makeExceptInstType( exceptionName, parameters ) ), |
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66 | nullptr |
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67 | ) ); |
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68 | copyFnType->get_parameters().push_back( new ObjectDecl( |
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69 | "that", |
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70 | noStorageClasses, |
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71 | LinkageSpec::Cforall, |
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72 | nullptr, |
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73 | new PointerType( noQualifiers, |
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74 | makeExceptInstType( exceptionName, parameters ) ), |
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75 | nullptr |
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76 | ) ); |
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77 | copyFnType->get_returnVals().push_back( new ObjectDecl( |
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78 | "", |
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79 | noStorageClasses, |
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80 | LinkageSpec::Cforall, |
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81 | nullptr, |
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82 | new VoidType( noQualifiers ), |
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83 | nullptr |
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84 | ) ); |
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85 | return copyFnType; |
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86 | } |
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87 | |
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88 | // void (*^?{})(exception_name parameters & this); |
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89 | FunctionType * makeDtorFnType( |
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90 | const std::string & exceptionName, |
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91 | const std::list< Expression *> & parameters |
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92 | ) { |
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93 | FunctionType * dtorFnType = new FunctionType( noQualifiers, false ); |
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94 | dtorFnType->get_parameters().push_back( new ObjectDecl( |
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95 | "this", |
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96 | noStorageClasses, |
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97 | LinkageSpec::Cforall, |
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98 | nullptr, |
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99 | new ReferenceType( noQualifiers, |
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100 | makeExceptInstType( exceptionName, parameters ) ), |
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101 | nullptr |
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102 | ) ); |
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103 | dtorFnType->get_returnVals().push_back( new ObjectDecl( |
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104 | "", |
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105 | noStorageClasses, |
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106 | LinkageSpec::Cforall, |
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107 | nullptr, |
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108 | new VoidType( noQualifiers ), |
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109 | nullptr |
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110 | ) ); |
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111 | return dtorFnType; |
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112 | } |
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113 | |
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114 | // const char * (*msg)(exception_name parameters * this); |
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115 | FunctionType * makeMsgFnType( |
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116 | const std::string & exceptionName, |
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117 | const std::list< Expression *> & parameters |
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118 | ) { |
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119 | FunctionType * msgFnType = new FunctionType( noQualifiers, false ); |
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120 | msgFnType->get_parameters().push_back( new ObjectDecl( |
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121 | "this", |
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122 | noStorageClasses, |
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123 | LinkageSpec::Cforall, |
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124 | nullptr, |
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125 | new PointerType( noQualifiers, |
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126 | makeExceptInstType( exceptionName, parameters ) ), |
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127 | nullptr |
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128 | ) ); |
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129 | msgFnType->get_returnVals().push_back( new ObjectDecl( |
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130 | "", |
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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 PointerType( noQualifiers, |
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135 | new BasicType( Type::Const, BasicType::Char ) ), |
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136 | nullptr |
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137 | ) ); |
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138 | return msgFnType; |
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139 | } |
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140 | |
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141 | StructDecl * ehmTypeIdStruct( |
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142 | const std::string & exceptionName, |
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143 | const std::list< TypeDecl *> & forallClause |
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144 | ) { |
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145 | StructDecl * structDecl = new StructDecl( Virtual::typeIdType( exceptionName ) ); |
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146 | structDecl->members.push_back( new ObjectDecl( |
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147 | "parent", |
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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, |
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152 | new StructInstType( Type::Const, "__cfavir_type_info" ) ), |
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153 | nullptr |
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154 | ) ); |
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155 | structDecl->set_body( true ); |
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156 | cloneAll( forallClause, structDecl->parameters ); |
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157 | return structDecl; |
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158 | } |
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159 | |
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160 | ObjectDecl * ehmTypeIdValue( |
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161 | const std::string & exceptionName, |
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162 | const std::list< Expression *> & parameters |
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163 | ) { |
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164 | StructInstType * typeIdType = new StructInstType( |
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165 | Type::Const, |
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166 | Virtual::typeIdType( exceptionName ) |
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167 | ); |
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168 | cloneAll( parameters, typeIdType->parameters ); |
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169 | return new ObjectDecl( |
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170 | Virtual::typeIdName( exceptionName ), |
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171 | noStorageClasses, |
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172 | LinkageSpec::Cforall, |
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173 | nullptr, |
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174 | typeIdType, |
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175 | new ListInit( { new SingleInit( |
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176 | new AddressExpr( new NameExpr( "__cfatid_exception_t" ) ) |
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177 | ) }, {}, true ), |
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178 | { new Attribute( "cfa_linkonce" ) } |
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179 | ); |
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180 | } |
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181 | |
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182 | StructDecl * ehmExceptionStructDecl( |
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183 | const std::string & exceptionName, |
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184 | const std::list< TypeDecl *> & forallClause |
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185 | ) { |
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186 | StructDecl * structDecl = new StructDecl( exceptionName ); |
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187 | cloneAll( forallClause, structDecl->parameters ); |
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188 | return structDecl; |
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189 | } |
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190 | |
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191 | StructDecl * ehmVirtualTableStruct( |
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192 | const std::string & exceptionName, |
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193 | const std::list< TypeDecl *> & forallClause, |
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194 | const std::list< Expression *> & parameters |
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195 | ) { |
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196 | StructInstType * typeIdType = new StructInstType( |
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197 | Type::Const, |
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198 | Virtual::typeIdType( exceptionName ) |
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199 | ); |
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200 | cloneAll( parameters, typeIdType->parameters ); |
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201 | ObjectDecl * typeId = new ObjectDecl( |
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202 | "__cfavir_typeid", |
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203 | noStorageClasses, |
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204 | LinkageSpec::Cforall, |
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205 | nullptr, |
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206 | new PointerType( noQualifiers, typeIdType ), |
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207 | nullptr |
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208 | ); |
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209 | ObjectDecl * size = new ObjectDecl( |
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210 | "size", |
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211 | noStorageClasses, |
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212 | LinkageSpec::Cforall, |
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213 | nullptr, |
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214 | new TypeInstType( noQualifiers, "size_t", false ), |
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215 | nullptr |
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216 | ); |
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217 | ObjectDecl * copy = new ObjectDecl( |
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218 | "copy", |
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219 | noStorageClasses, |
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220 | LinkageSpec::Cforall, |
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221 | nullptr, |
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222 | new PointerType( noQualifiers, |
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223 | makeCopyFnType( exceptionName, parameters ) ), |
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224 | nullptr |
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225 | ); |
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226 | ObjectDecl * dtor = new ObjectDecl( |
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227 | "^?{}", |
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228 | noStorageClasses, |
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229 | LinkageSpec::Cforall, |
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230 | nullptr, |
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231 | new PointerType( noQualifiers, |
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232 | makeDtorFnType( exceptionName, parameters ) ), |
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233 | nullptr |
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234 | ); |
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235 | ObjectDecl * msg = new ObjectDecl( |
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236 | "msg", |
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237 | noStorageClasses, |
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238 | LinkageSpec::Cforall, |
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239 | nullptr, |
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240 | new PointerType( noQualifiers, |
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241 | makeMsgFnType( exceptionName, parameters ) ), |
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242 | nullptr |
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243 | ); |
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244 | StructDecl * structDecl = new StructDecl( Virtual::vtableTypeName( exceptionName ) ); |
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245 | structDecl->members.push_back( typeId ); |
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246 | structDecl->members.push_back( size ); |
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247 | structDecl->members.push_back( copy ); |
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248 | structDecl->members.push_back( dtor ); |
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249 | structDecl->members.push_back( msg ); |
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250 | structDecl->set_body( true ); |
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251 | cloneAll( forallClause, structDecl->parameters ); |
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252 | return structDecl; |
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253 | } |
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254 | |
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255 | StructDecl * ehmExceptionStruct( |
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256 | const std::string & exceptionName, |
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257 | const std::list< TypeDecl *> & forallClause, |
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258 | const std::list< Expression *> & parameters, |
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259 | const std::list< Declaration *> & members |
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260 | ) { |
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261 | StructInstType * vtableType = new StructInstType( |
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262 | Type::Const, |
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263 | Virtual::vtableTypeName( exceptionName ) |
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264 | ); |
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265 | cloneAll( parameters, vtableType->parameters ); |
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266 | StructDecl * structDecl = new StructDecl( exceptionName ); |
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267 | structDecl->members = members; |
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268 | structDecl->members.push_front( new ObjectDecl( |
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269 | "virtual_table", |
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270 | noStorageClasses, |
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271 | LinkageSpec::Cforall, |
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272 | nullptr, |
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273 | new PointerType( noQualifiers, vtableType ), |
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274 | nullptr |
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275 | ) ); |
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276 | structDecl->set_body( true ); |
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277 | cloneAll( forallClause, structDecl->parameters ); |
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278 | return structDecl; |
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279 | } |
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280 | |
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281 | ObjectDecl * ehmTypeIdExtern( |
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282 | const std::string & exceptionName, |
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283 | const std::list< Expression *> & parameters |
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284 | ) { |
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285 | StructInstType * typeIdType = new StructInstType( |
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286 | Type::Const, |
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287 | Virtual::typeIdType( exceptionName ) |
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288 | ); |
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289 | cloneAll( parameters, typeIdType->parameters ); |
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290 | return new ObjectDecl( |
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291 | Virtual::typeIdName( exceptionName ), |
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292 | Type::Extern, |
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293 | LinkageSpec::Cforall, |
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294 | nullptr, |
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295 | typeIdType, |
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296 | nullptr, |
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297 | { new Attribute( "cfa_linkonce" ) } |
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298 | ); |
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299 | } |
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300 | |
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301 | ObjectDecl * ehmExternVtable( |
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302 | const std::string & exceptionName, |
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303 | const std::list< Expression *> & parameters, |
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304 | const std::string & tableName |
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305 | ) { |
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306 | StructInstType * vtableType = new StructInstType( |
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307 | Type::Const, |
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308 | Virtual::vtableTypeName( exceptionName ) |
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309 | ); |
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310 | cloneAll( parameters, vtableType->parameters ); |
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311 | return new ObjectDecl( |
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312 | tableName, |
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313 | Type::Extern, |
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314 | LinkageSpec::Cforall, |
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315 | nullptr, |
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316 | vtableType, |
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317 | nullptr |
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318 | ); |
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319 | } |
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320 | |
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321 | FunctionDecl * ehmDefineCopy( |
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322 | const std::string & exceptionName, |
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323 | const std::list< Expression *> & parameters |
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324 | ) { |
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325 | return new FunctionDecl( |
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326 | "copy", |
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327 | noStorageClasses, |
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328 | LinkageSpec::Cforall, |
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329 | makeCopyFnType( exceptionName, parameters ), |
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330 | new CompoundStmt( { |
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331 | new ExprStmt( new UntypedExpr( new NameExpr( "?=?" ), { |
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332 | new UntypedExpr( new NameExpr( "*?" ), { new NameExpr( "this" ) } ), |
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333 | new UntypedExpr( new NameExpr( "*?" ), { new NameExpr( "that" ) } ) |
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334 | } ) ) |
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335 | } ) |
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336 | ); |
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337 | } |
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338 | |
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339 | FunctionDecl * ehmDefineMsg( |
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340 | const std::string & exceptionName, |
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341 | const std::list< Expression *> & parameters |
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342 | ) { |
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343 | std::stringstream msg; |
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344 | msg << exceptionName; |
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345 | if ( !parameters.empty() ) { // forall variant, add parameters |
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346 | msg << "("; |
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347 | for ( auto it = parameters.begin(); it != parameters.end(); it++ ) { |
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348 | ( *it )->print( msg ); |
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349 | if ( it + 1 == parameters.end() ) { |
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350 | msg << ")"; // end of list, close bracket |
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351 | } else { |
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352 | msg << ", "; // otherwise use comma as separator |
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353 | } |
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354 | } |
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355 | } |
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356 | return new FunctionDecl( |
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357 | "msg", |
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358 | noStorageClasses, |
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359 | LinkageSpec::Cforall, |
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360 | makeMsgFnType( exceptionName, parameters ), |
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361 | new CompoundStmt( { |
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362 | new ReturnStmt( new ConstantExpr( Constant::from_string( msg.str() ) ) ) |
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363 | } ) |
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364 | ); |
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365 | } |
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366 | |
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367 | ObjectDecl * ehmVirtualTable( |
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368 | const std::string & exceptionName, |
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369 | const std::list< Expression *> & parameters, |
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370 | const std::string & tableName |
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371 | ) { |
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372 | StructInstType * sizeofType = new StructInstType( noQualifiers, exceptionName ); |
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373 | cloneAll( parameters, sizeofType->parameters ); |
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374 | std::list< Initializer *> inits { |
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375 | new SingleInit( new AddressExpr( |
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376 | new NameExpr( Virtual::typeIdName( exceptionName ) ) ) ), |
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377 | new SingleInit( new SizeofExpr( sizeofType ) ), |
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378 | new SingleInit( new NameExpr( "copy" ) ), |
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379 | new SingleInit( new NameExpr( "^?{}" ) ), |
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380 | new SingleInit( new NameExpr( "msg" ) ) |
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381 | }; |
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382 | std::list< Designation *> desig { |
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383 | new Designation( { new NameExpr( "__cfavir_typeid" ) } ), |
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384 | new Designation( { new NameExpr( "size" ) } ), |
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385 | new Designation( { new NameExpr( "copy" ) } ), |
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386 | new Designation( { new NameExpr( "^?{}" ) } ), |
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387 | new Designation( { new NameExpr( "msg" ) } ) |
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388 | }; |
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389 | StructInstType * vtableType = new StructInstType( |
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390 | Type::Const, |
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391 | Virtual::vtableTypeName( exceptionName ) |
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392 | ); |
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393 | cloneAll( parameters, vtableType->parameters ); |
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394 | return new ObjectDecl( |
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395 | tableName, |
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396 | noStorageClasses, |
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397 | LinkageSpec::Cforall, |
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398 | nullptr, |
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399 | vtableType, |
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400 | new ListInit( inits, desig ) |
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401 | ); |
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402 | } |
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403 | |
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404 | class ExceptDeclCore : public WithDeclsToAdd { |
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405 | public: |
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406 | // translates exception decls |
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407 | Declaration * postmutate( StructDecl * structDecl ); |
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408 | |
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409 | // translates vtable decls |
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410 | DeclarationWithType * postmutate( ObjectDecl * objectDecl ); |
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411 | }; |
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412 | |
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413 | Declaration * ExceptDeclCore::postmutate( StructDecl * structDecl ) { |
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414 | if ( structDecl->is_exception() ) { |
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415 | const std::string & exceptionName = structDecl->get_name(); |
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416 | const std::list< TypeDecl *> & forallClause = structDecl->get_parameters(); |
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417 | const std::list< Expression *> & parameters = makeParameters( forallClause ); |
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418 | const std::list< Declaration *> & members = structDecl->get_members(); |
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419 | |
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420 | declsToAddBefore.push_back( ehmTypeIdStruct( exceptionName, forallClause ) ); |
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421 | if ( forallClause.empty() ) { // non-forall variant |
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422 | declsToAddBefore.push_back( ehmTypeIdValue( exceptionName, parameters ) ); |
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423 | } |
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424 | declsToAddBefore.push_back( ehmExceptionStructDecl( exceptionName, forallClause ) ); |
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425 | declsToAddBefore.push_back( ehmVirtualTableStruct( exceptionName, forallClause, parameters ) ); |
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426 | return ehmExceptionStruct( exceptionName, forallClause, parameters, members ); |
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427 | } |
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428 | return structDecl; |
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429 | } |
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430 | |
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431 | DeclarationWithType * ExceptDeclCore::postmutate( ObjectDecl * objectDecl ) { |
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432 | // Check if it is VTableType |
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433 | VTableType * vtableType = dynamic_cast< VTableType *>( objectDecl->get_type() ); |
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434 | if ( vtableType ) { |
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435 | TypeInstType * base = dynamic_cast< TypeInstType *>( vtableType->get_base() ); |
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436 | assert( base ); // should be a TypeInstType |
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437 | const std::string & exceptionName = base->get_name(); |
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438 | const std::string & tableName = objectDecl->get_name(); |
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439 | const std::list< Expression *> parameters = base->get_parameters(); |
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440 | |
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441 | if ( objectDecl->get_storageClasses().is_extern ) { // if extern |
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442 | if ( !parameters.empty() ) { // forall variant |
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443 | declsToAddBefore.push_back( ehmTypeIdExtern( exceptionName, parameters ) ); |
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444 | } |
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445 | return ehmExternVtable( exceptionName, parameters, tableName ); |
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446 | } |
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447 | // else, non-extern |
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448 | if ( !parameters.empty() ) { // forall variant |
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449 | declsToAddBefore.push_back( ehmTypeIdValue( exceptionName, parameters ) ); |
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450 | } |
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451 | declsToAddBefore.push_back( ehmDefineCopy( exceptionName, parameters ) ); |
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452 | declsToAddBefore.push_back( ehmDefineMsg( exceptionName, parameters ) ); |
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453 | return ehmVirtualTable( exceptionName, parameters, tableName ); |
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454 | } |
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455 | return objectDecl; |
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456 | } |
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457 | |
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458 | class VTableCore : public WithDeclsToAdd { |
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459 | public: |
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460 | // Remove any remaining vtable type nodes in the tree. |
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461 | Type * postmutate( VTableType * vtableType ); |
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462 | }; |
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463 | |
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464 | Type * VTableCore::postmutate( VTableType * vtableType ) { |
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465 | auto inst = strict_dynamic_cast<ReferenceToType *>( vtableType->base ); |
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466 | |
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467 | std::string vtableName = Virtual::vtableTypeName( inst->name ); |
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468 | StructInstType * newType = new StructInstType( noQualifiers, vtableName ); |
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469 | cloneAll( inst->parameters, newType->parameters ); |
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470 | |
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471 | delete vtableType; |
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472 | return newType; |
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473 | } |
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474 | |
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475 | void translateExcept( std::list< Declaration *> & translationUnit ) { |
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476 | PassVisitor<ExceptDeclCore> translator; |
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477 | mutateAll( translationUnit, translator ); |
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478 | PassVisitor<VTableCore> typeTranslator; |
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479 | mutateAll( translationUnit, typeTranslator ); |
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480 | } |
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481 | |
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482 | } |
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