[2cf3b87] | 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 | // KeywordsNew.cpp -- Implement concurrency constructs from their keywords. |
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| 8 | // |
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| 9 | // Author : Andrew Beach |
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| 10 | // Created On : Tue Nov 16 9:53:00 2021 |
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| 11 | // Last Modified By : Andrew Beach |
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[4f6dda0] | 12 | // Last Modified On : Fri Mar 11 10:40:00 2022 |
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| 13 | // Update Count : 2 |
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[2cf3b87] | 14 | // |
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| 15 | |
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[080d2d7] | 16 | #include <iostream> |
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| 17 | |
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[2cf3b87] | 18 | #include "Concurrency/Keywords.h" |
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| 19 | |
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| 20 | #include "AST/Copy.hpp" |
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| 21 | #include "AST/Decl.hpp" |
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[4f6dda0] | 22 | #include "AST/Expr.hpp" |
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[e01eb4a] | 23 | #include "AST/Inspect.hpp" |
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[2cf3b87] | 24 | #include "AST/Pass.hpp" |
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| 25 | #include "AST/Stmt.hpp" |
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[4f6dda0] | 26 | #include "AST/DeclReplacer.hpp" |
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[2cf3b87] | 27 | #include "AST/TranslationUnit.hpp" |
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| 28 | #include "CodeGen/OperatorTable.h" |
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[4f6dda0] | 29 | #include "Common/Examine.h" |
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[2cf3b87] | 30 | #include "Common/utility.h" |
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[080d2d7] | 31 | #include "Common/UniqueName.h" |
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[4f6dda0] | 32 | #include "ControlStruct/LabelGeneratorNew.hpp" |
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[2cf3b87] | 33 | #include "InitTweak/InitTweak.h" |
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[4f6dda0] | 34 | #include "Virtual/Tables.h" |
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[2cf3b87] | 35 | |
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| 36 | namespace Concurrency { |
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| 37 | |
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| 38 | namespace { |
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| 39 | |
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[4f6dda0] | 40 | // -------------------------------------------------------------------------- |
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| 41 | // Loose Helper Functions: |
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| 42 | |
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| 43 | /// Detect threads constructed with the keyword thread. |
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| 44 | bool isThread( const ast::DeclWithType * decl ) { |
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[2cf3b87] | 45 | auto baseType = decl->get_type()->stripDeclarator(); |
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| 46 | auto instType = dynamic_cast<const ast::StructInstType *>( baseType ); |
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| 47 | if ( nullptr == instType ) { return false; } |
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| 48 | return instType->base->is_thread(); |
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| 49 | } |
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| 50 | |
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[4f6dda0] | 51 | /// Get the virtual type id if given a type name. |
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| 52 | std::string typeIdType( std::string const & exception_name ) { |
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| 53 | return exception_name.empty() ? std::string() |
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| 54 | : Virtual::typeIdType( exception_name ); |
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| 55 | } |
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| 56 | |
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| 57 | /// Get the vtable type name if given a type name. |
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| 58 | std::string vtableTypeName( std::string const & exception_name ) { |
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| 59 | return exception_name.empty() ? std::string() |
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| 60 | : Virtual::vtableTypeName( exception_name ); |
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| 61 | } |
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| 62 | |
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| 63 | static ast::Type * mutate_under_references( ast::ptr<ast::Type>& type ) { |
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| 64 | ast::Type * mutType = type.get_and_mutate(); |
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| 65 | for ( ast::ReferenceType * mutRef |
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| 66 | ; (mutRef = dynamic_cast<ast::ReferenceType *>( mutType )) |
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| 67 | ; mutType = mutRef->base.get_and_mutate() ); |
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| 68 | return mutType; |
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| 69 | } |
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| 70 | |
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| 71 | // Describe that it adds the generic parameters and the uses of the generic |
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| 72 | // parameters on the function and first "this" argument. |
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| 73 | ast::FunctionDecl * fixupGenerics( |
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| 74 | const ast::FunctionDecl * func, const ast::StructDecl * decl ) { |
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| 75 | const CodeLocation & location = decl->location; |
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| 76 | // We have to update both the declaration |
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| 77 | auto mutFunc = ast::mutate( func ); |
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| 78 | auto mutType = mutFunc->type.get_and_mutate(); |
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| 79 | |
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| 80 | if ( decl->params.empty() ) { |
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| 81 | return mutFunc; |
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| 82 | } |
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| 83 | |
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| 84 | assert( 0 != mutFunc->params.size() ); |
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| 85 | assert( 0 != mutType->params.size() ); |
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| 86 | |
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| 87 | // Add the "forall" clause information. |
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| 88 | for ( const ast::ptr<ast::TypeDecl> & typeParam : decl->params ) { |
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| 89 | auto typeDecl = ast::deepCopy( typeParam ); |
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| 90 | mutFunc->type_params.push_back( typeDecl ); |
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[b230091] | 91 | mutType->forall.push_back( new ast::TypeInstType( typeDecl ) ); |
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[4f6dda0] | 92 | for ( auto & assertion : typeDecl->assertions ) { |
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| 93 | mutFunc->assertions.push_back( assertion ); |
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| 94 | mutType->assertions.emplace_back( |
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| 95 | new ast::VariableExpr( location, assertion ) ); |
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| 96 | } |
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| 97 | typeDecl->assertions.clear(); |
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| 98 | } |
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| 99 | |
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| 100 | // Even chain_mutate is not powerful enough for this: |
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| 101 | ast::ptr<ast::Type>& paramType = strict_dynamic_cast<ast::ObjectDecl *>( |
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| 102 | mutFunc->params[0].get_and_mutate() )->type; |
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| 103 | auto paramTypeInst = strict_dynamic_cast<ast::StructInstType *>( |
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| 104 | mutate_under_references( paramType ) ); |
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| 105 | auto typeParamInst = strict_dynamic_cast<ast::StructInstType *>( |
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| 106 | mutate_under_references( mutType->params[0] ) ); |
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| 107 | |
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| 108 | for ( const ast::ptr<ast::TypeDecl> & typeDecl : mutFunc->type_params ) { |
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| 109 | paramTypeInst->params.push_back( |
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[b230091] | 110 | new ast::TypeExpr( location, new ast::TypeInstType( typeDecl ) ) ); |
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[4f6dda0] | 111 | typeParamInst->params.push_back( |
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[b230091] | 112 | new ast::TypeExpr( location, new ast::TypeInstType( typeDecl ) ) ); |
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[4f6dda0] | 113 | } |
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| 114 | |
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| 115 | return mutFunc; |
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| 116 | } |
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| 117 | |
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| 118 | // -------------------------------------------------------------------------- |
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| 119 | struct ConcurrentSueKeyword : public ast::WithDeclsToAdd<> { |
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| 120 | ConcurrentSueKeyword( |
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| 121 | std::string&& type_name, std::string&& field_name, |
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| 122 | std::string&& getter_name, std::string&& context_error, |
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| 123 | std::string&& exception_name, |
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| 124 | bool needs_main, ast::AggregateDecl::Aggregate cast_target |
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| 125 | ) : |
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| 126 | type_name( type_name ), field_name( field_name ), |
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| 127 | getter_name( getter_name ), context_error( context_error ), |
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| 128 | exception_name( exception_name ), |
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| 129 | typeid_name( typeIdType( exception_name ) ), |
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| 130 | vtable_name( vtableTypeName( exception_name ) ), |
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| 131 | needs_main( needs_main ), cast_target( cast_target ) |
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| 132 | {} |
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| 133 | |
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| 134 | virtual ~ConcurrentSueKeyword() {} |
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| 135 | |
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| 136 | const ast::Decl * postvisit( const ast::StructDecl * decl ); |
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| 137 | const ast::DeclWithType * postvisit( const ast::FunctionDecl * decl ); |
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| 138 | const ast::Expr * postvisit( const ast::KeywordCastExpr * expr ); |
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| 139 | |
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| 140 | struct StructAndField { |
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| 141 | const ast::StructDecl * decl; |
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| 142 | const ast::ObjectDecl * field; |
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| 143 | }; |
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| 144 | |
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| 145 | const ast::StructDecl * handleStruct( const ast::StructDecl * ); |
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| 146 | void handleMain( const ast::FunctionDecl *, const ast::StructInstType * ); |
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| 147 | void addTypeId( const ast::StructDecl * ); |
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| 148 | void addVtableForward( const ast::StructDecl * ); |
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| 149 | const ast::FunctionDecl * forwardDeclare( const ast::StructDecl * ); |
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| 150 | StructAndField addField( const ast::StructDecl * ); |
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| 151 | void addGetRoutines( const ast::ObjectDecl *, const ast::FunctionDecl * ); |
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| 152 | void addLockUnlockRoutines( const ast::StructDecl * ); |
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| 153 | |
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| 154 | private: |
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| 155 | const std::string type_name; |
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| 156 | const std::string field_name; |
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| 157 | const std::string getter_name; |
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| 158 | const std::string context_error; |
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| 159 | const std::string exception_name; |
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| 160 | const std::string typeid_name; |
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| 161 | const std::string vtable_name; |
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| 162 | const bool needs_main; |
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| 163 | const ast::AggregateDecl::Aggregate cast_target; |
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| 164 | |
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| 165 | const ast::StructDecl * type_decl = nullptr; |
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| 166 | const ast::FunctionDecl * dtor_decl = nullptr; |
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| 167 | const ast::StructDecl * except_decl = nullptr; |
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| 168 | const ast::StructDecl * typeid_decl = nullptr; |
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| 169 | const ast::StructDecl * vtable_decl = nullptr; |
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[080d2d7] | 170 | |
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[4f6dda0] | 171 | }; |
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| 172 | |
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| 173 | // Handles thread type declarations: |
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| 174 | // |
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| 175 | // thread Mythread { struct MyThread { |
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| 176 | // int data; int data; |
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| 177 | // a_struct_t more_data; a_struct_t more_data; |
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| 178 | // => thread$ __thrd_d; |
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| 179 | // }; }; |
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| 180 | // static inline thread$ * get_thread( MyThread * this ) { return &this->__thrd_d; } |
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| 181 | // |
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| 182 | struct ThreadKeyword final : public ConcurrentSueKeyword { |
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| 183 | ThreadKeyword() : ConcurrentSueKeyword( |
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| 184 | "thread$", |
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| 185 | "__thrd", |
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| 186 | "get_thread", |
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| 187 | "thread keyword requires threads to be in scope, add #include <thread.hfa>\n", |
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| 188 | "ThreadCancelled", |
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| 189 | true, |
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| 190 | ast::AggregateDecl::Thread ) |
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| 191 | {} |
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| 192 | |
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| 193 | virtual ~ThreadKeyword() {} |
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| 194 | }; |
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| 195 | |
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| 196 | // Handles coroutine type declarations: |
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| 197 | // |
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| 198 | // coroutine MyCoroutine { struct MyCoroutine { |
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| 199 | // int data; int data; |
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| 200 | // a_struct_t more_data; a_struct_t more_data; |
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| 201 | // => coroutine$ __cor_d; |
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| 202 | // }; }; |
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| 203 | // static inline coroutine$ * get_coroutine( MyCoroutine * this ) { return &this->__cor_d; } |
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| 204 | // |
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| 205 | struct CoroutineKeyword final : public ConcurrentSueKeyword { |
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| 206 | CoroutineKeyword() : ConcurrentSueKeyword( |
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| 207 | "coroutine$", |
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| 208 | "__cor", |
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| 209 | "get_coroutine", |
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| 210 | "coroutine keyword requires coroutines to be in scope, add #include <coroutine.hfa>\n", |
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| 211 | "CoroutineCancelled", |
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| 212 | true, |
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| 213 | ast::AggregateDecl::Coroutine ) |
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| 214 | {} |
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| 215 | |
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| 216 | virtual ~CoroutineKeyword() {} |
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| 217 | }; |
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| 218 | |
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| 219 | // Handles monitor type declarations: |
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| 220 | // |
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| 221 | // monitor MyMonitor { struct MyMonitor { |
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| 222 | // int data; int data; |
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| 223 | // a_struct_t more_data; a_struct_t more_data; |
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| 224 | // => monitor$ __mon_d; |
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| 225 | // }; }; |
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| 226 | // static inline monitor$ * get_coroutine( MyMonitor * this ) { |
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| 227 | // return &this->__cor_d; |
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| 228 | // } |
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| 229 | // void lock(MyMonitor & this) { |
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| 230 | // lock(get_monitor(this)); |
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| 231 | // } |
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| 232 | // void unlock(MyMonitor & this) { |
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| 233 | // unlock(get_monitor(this)); |
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| 234 | // } |
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| 235 | // |
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| 236 | struct MonitorKeyword final : public ConcurrentSueKeyword { |
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| 237 | MonitorKeyword() : ConcurrentSueKeyword( |
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| 238 | "monitor$", |
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| 239 | "__mon", |
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| 240 | "get_monitor", |
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| 241 | "monitor keyword requires monitors to be in scope, add #include <monitor.hfa>\n", |
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| 242 | "", |
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| 243 | false, |
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| 244 | ast::AggregateDecl::Monitor ) |
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| 245 | {} |
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| 246 | |
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| 247 | virtual ~MonitorKeyword() {} |
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| 248 | }; |
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| 249 | |
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| 250 | // Handles generator type declarations: |
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| 251 | // |
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| 252 | // generator MyGenerator { struct MyGenerator { |
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| 253 | // int data; int data; |
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| 254 | // a_struct_t more_data; a_struct_t more_data; |
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| 255 | // => int __generator_state; |
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| 256 | // }; }; |
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| 257 | // |
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| 258 | struct GeneratorKeyword final : public ConcurrentSueKeyword { |
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| 259 | GeneratorKeyword() : ConcurrentSueKeyword( |
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| 260 | "generator$", |
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| 261 | "__generator_state", |
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| 262 | "get_generator", |
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| 263 | "Unable to find builtin type generator$\n", |
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| 264 | "", |
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| 265 | true, |
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| 266 | ast::AggregateDecl::Generator ) |
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| 267 | {} |
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| 268 | |
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| 269 | virtual ~GeneratorKeyword() {} |
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| 270 | }; |
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| 271 | |
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| 272 | const ast::Decl * ConcurrentSueKeyword::postvisit( |
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| 273 | const ast::StructDecl * decl ) { |
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| 274 | if ( !decl->body ) { |
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| 275 | return decl; |
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| 276 | } else if ( cast_target == decl->kind ) { |
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| 277 | return handleStruct( decl ); |
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| 278 | } else if ( type_name == decl->name ) { |
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| 279 | assert( !type_decl ); |
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| 280 | type_decl = decl; |
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| 281 | } else if ( exception_name == decl->name ) { |
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| 282 | assert( !except_decl ); |
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| 283 | except_decl = decl; |
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| 284 | } else if ( typeid_name == decl->name ) { |
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| 285 | assert( !typeid_decl ); |
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| 286 | typeid_decl = decl; |
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| 287 | } else if ( vtable_name == decl->name ) { |
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| 288 | assert( !vtable_decl ); |
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| 289 | vtable_decl = decl; |
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| 290 | } |
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| 291 | return decl; |
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| 292 | } |
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| 293 | |
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| 294 | // Try to get the full definition, but raise an error on conflicts. |
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| 295 | const ast::FunctionDecl * getDefinition( |
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| 296 | const ast::FunctionDecl * old_decl, |
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| 297 | const ast::FunctionDecl * new_decl ) { |
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| 298 | if ( !new_decl->stmts ) { |
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| 299 | return old_decl; |
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| 300 | } else if ( !old_decl->stmts ) { |
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| 301 | return new_decl; |
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| 302 | } else { |
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| 303 | assert( !old_decl->stmts || !new_decl->stmts ); |
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| 304 | return nullptr; |
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| 305 | } |
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| 306 | } |
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| 307 | |
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| 308 | const ast::DeclWithType * ConcurrentSueKeyword::postvisit( |
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| 309 | const ast::FunctionDecl * decl ) { |
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| 310 | if ( type_decl && isDestructorFor( decl, type_decl ) ) { |
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| 311 | // Check for forward declarations, try to get the full definition. |
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| 312 | dtor_decl = (dtor_decl) ? getDefinition( dtor_decl, decl ) : decl; |
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| 313 | } else if ( !vtable_name.empty() && decl->has_body() ) { |
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| 314 | if (const ast::DeclWithType * param = isMainFor( decl, cast_target )) { |
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| 315 | if ( !vtable_decl ) { |
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| 316 | SemanticError( decl, context_error ); |
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| 317 | } |
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| 318 | // Should be safe because of isMainFor. |
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| 319 | const ast::StructInstType * struct_type = |
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| 320 | static_cast<const ast::StructInstType *>( |
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| 321 | static_cast<const ast::ReferenceType *>( |
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| 322 | param->get_type() )->base.get() ); |
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| 323 | |
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| 324 | handleMain( decl, struct_type ); |
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| 325 | } |
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| 326 | } |
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| 327 | return decl; |
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| 328 | } |
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| 329 | |
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| 330 | const ast::Expr * ConcurrentSueKeyword::postvisit( |
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| 331 | const ast::KeywordCastExpr * expr ) { |
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| 332 | if ( cast_target == expr->target ) { |
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| 333 | // Convert `(thread &)ex` to `(thread$ &)*get_thread(ex)`, etc. |
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| 334 | if ( !type_decl || !dtor_decl ) { |
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| 335 | SemanticError( expr, context_error ); |
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| 336 | } |
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| 337 | assert( nullptr == expr->result ); |
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| 338 | auto cast = ast::mutate( expr ); |
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| 339 | cast->result = new ast::ReferenceType( new ast::StructInstType( type_decl ) ); |
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| 340 | cast->concrete_target.field = field_name; |
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| 341 | cast->concrete_target.getter = getter_name; |
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| 342 | return cast; |
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| 343 | } |
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| 344 | return expr; |
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| 345 | } |
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| 346 | |
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| 347 | const ast::StructDecl * ConcurrentSueKeyword::handleStruct( |
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| 348 | const ast::StructDecl * decl ) { |
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| 349 | assert( decl->body ); |
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| 350 | |
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| 351 | if ( !type_decl || !dtor_decl ) { |
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| 352 | SemanticError( decl, context_error ); |
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| 353 | } |
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| 354 | |
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| 355 | if ( !exception_name.empty() ) { |
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| 356 | if( !typeid_decl || !vtable_decl ) { |
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| 357 | SemanticError( decl, context_error ); |
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| 358 | } |
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| 359 | addTypeId( decl ); |
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| 360 | addVtableForward( decl ); |
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| 361 | } |
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| 362 | |
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| 363 | const ast::FunctionDecl * func = forwardDeclare( decl ); |
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| 364 | StructAndField addFieldRet = addField( decl ); |
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| 365 | decl = addFieldRet.decl; |
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| 366 | const ast::ObjectDecl * field = addFieldRet.field; |
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| 367 | |
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| 368 | addGetRoutines( field, func ); |
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| 369 | // Add routines to monitors for use by mutex stmt. |
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| 370 | if ( ast::AggregateDecl::Monitor == cast_target ) { |
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| 371 | addLockUnlockRoutines( decl ); |
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| 372 | } |
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| 373 | |
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| 374 | return decl; |
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| 375 | } |
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| 376 | |
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| 377 | void ConcurrentSueKeyword::handleMain( |
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| 378 | const ast::FunctionDecl * decl, const ast::StructInstType * type ) { |
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| 379 | assert( vtable_decl ); |
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| 380 | assert( except_decl ); |
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| 381 | |
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| 382 | const CodeLocation & location = decl->location; |
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| 383 | |
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| 384 | std::vector<ast::ptr<ast::Expr>> poly_args = { |
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| 385 | new ast::TypeExpr( location, type ), |
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| 386 | }; |
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| 387 | ast::ObjectDecl * vtable_object = Virtual::makeVtableInstance( |
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| 388 | location, |
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| 389 | "_default_vtable_object_declaration", |
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| 390 | new ast::StructInstType( vtable_decl, copy( poly_args ) ), |
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| 391 | type, |
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| 392 | nullptr |
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| 393 | ); |
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| 394 | declsToAddAfter.push_back( vtable_object ); |
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| 395 | declsToAddAfter.push_back( |
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| 396 | new ast::ObjectDecl( |
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| 397 | location, |
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| 398 | Virtual::concurrentDefaultVTableName(), |
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| 399 | new ast::ReferenceType( vtable_object->type, ast::CV::Const ), |
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| 400 | new ast::SingleInit( location, |
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[e8616b6] | 401 | new ast::VariableExpr( location, vtable_object ) ) |
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[4f6dda0] | 402 | ) |
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| 403 | ); |
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| 404 | declsToAddAfter.push_back( Virtual::makeGetExceptionFunction( |
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| 405 | location, |
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| 406 | vtable_object, |
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| 407 | new ast::StructInstType( except_decl, copy( poly_args ) ) |
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| 408 | ) ); |
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| 409 | } |
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| 410 | |
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| 411 | void ConcurrentSueKeyword::addTypeId( const ast::StructDecl * decl ) { |
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| 412 | assert( typeid_decl ); |
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| 413 | const CodeLocation & location = decl->location; |
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| 414 | |
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| 415 | ast::StructInstType * typeid_type = |
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| 416 | new ast::StructInstType( typeid_decl, ast::CV::Const ); |
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| 417 | typeid_type->params.push_back( |
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| 418 | new ast::TypeExpr( location, new ast::StructInstType( decl ) ) ); |
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| 419 | declsToAddBefore.push_back( |
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| 420 | Virtual::makeTypeIdInstance( location, typeid_type ) ); |
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| 421 | // If the typeid_type is going to be kept, the other reference will have |
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| 422 | // been made by now, but we also get to avoid extra mutates. |
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| 423 | ast::ptr<ast::StructInstType> typeid_cleanup = typeid_type; |
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| 424 | } |
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| 425 | |
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| 426 | void ConcurrentSueKeyword::addVtableForward( const ast::StructDecl * decl ) { |
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| 427 | assert( vtable_decl ); |
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| 428 | const CodeLocation& location = decl->location; |
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| 429 | |
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| 430 | std::vector<ast::ptr<ast::Expr>> poly_args = { |
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| 431 | new ast::TypeExpr( location, new ast::StructInstType( decl ) ), |
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| 432 | }; |
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| 433 | declsToAddBefore.push_back( Virtual::makeGetExceptionForward( |
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| 434 | location, |
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| 435 | new ast::StructInstType( vtable_decl, copy( poly_args ) ), |
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| 436 | new ast::StructInstType( except_decl, copy( poly_args ) ) |
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| 437 | ) ); |
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| 438 | ast::ObjectDecl * vtable_object = Virtual::makeVtableForward( |
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| 439 | location, |
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| 440 | "_default_vtable_object_declaration", |
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| 441 | new ast::StructInstType( vtable_decl, std::move( poly_args ) ) |
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| 442 | ); |
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| 443 | declsToAddBefore.push_back( vtable_object ); |
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| 444 | declsToAddBefore.push_back( |
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| 445 | new ast::ObjectDecl( |
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| 446 | location, |
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| 447 | Virtual::concurrentDefaultVTableName(), |
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| 448 | new ast::ReferenceType( vtable_object->type, ast::CV::Const ), |
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| 449 | nullptr, |
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| 450 | ast::Storage::Extern, |
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| 451 | ast::Linkage::Cforall |
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| 452 | ) |
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| 453 | ); |
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| 454 | } |
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| 455 | |
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| 456 | const ast::FunctionDecl * ConcurrentSueKeyword::forwardDeclare( |
---|
| 457 | const ast::StructDecl * decl ) { |
---|
| 458 | const CodeLocation & location = decl->location; |
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| 459 | |
---|
| 460 | ast::StructDecl * forward = ast::deepCopy( decl ); |
---|
| 461 | { |
---|
| 462 | // If removing members makes ref-count go to zero, do not free. |
---|
| 463 | ast::ptr<ast::StructDecl> forward_ptr = forward; |
---|
| 464 | forward->body = false; |
---|
| 465 | forward->members.clear(); |
---|
| 466 | forward_ptr.release(); |
---|
| 467 | } |
---|
| 468 | |
---|
| 469 | ast::ObjectDecl * this_decl = new ast::ObjectDecl( |
---|
| 470 | location, |
---|
| 471 | "this", |
---|
[e8616b6] | 472 | new ast::ReferenceType( new ast::StructInstType( decl ) ) |
---|
[4f6dda0] | 473 | ); |
---|
| 474 | |
---|
| 475 | ast::ObjectDecl * ret_decl = new ast::ObjectDecl( |
---|
| 476 | location, |
---|
| 477 | "ret", |
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[e8616b6] | 478 | new ast::PointerType( new ast::StructInstType( type_decl ) ) |
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[4f6dda0] | 479 | ); |
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| 480 | |
---|
| 481 | ast::FunctionDecl * get_decl = new ast::FunctionDecl( |
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| 482 | location, |
---|
| 483 | getter_name, |
---|
| 484 | {}, // forall |
---|
| 485 | { this_decl }, // params |
---|
| 486 | { ret_decl }, // returns |
---|
| 487 | nullptr, // stmts |
---|
| 488 | ast::Storage::Static, |
---|
| 489 | ast::Linkage::Cforall, |
---|
| 490 | { new ast::Attribute( "const" ) }, |
---|
| 491 | ast::Function::Inline |
---|
| 492 | ); |
---|
| 493 | get_decl = fixupGenerics( get_decl, decl ); |
---|
| 494 | |
---|
| 495 | ast::FunctionDecl * main_decl = nullptr; |
---|
| 496 | if ( needs_main ) { |
---|
| 497 | // `this_decl` is copied here because the original was used above. |
---|
| 498 | main_decl = new ast::FunctionDecl( |
---|
| 499 | location, |
---|
| 500 | "main", |
---|
| 501 | {}, |
---|
| 502 | { ast::deepCopy( this_decl ) }, |
---|
| 503 | {}, |
---|
| 504 | nullptr, |
---|
| 505 | ast::Storage::Classes(), |
---|
| 506 | ast::Linkage::Cforall |
---|
| 507 | ); |
---|
| 508 | main_decl = fixupGenerics( main_decl, decl ); |
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| 509 | } |
---|
| 510 | |
---|
| 511 | declsToAddBefore.push_back( forward ); |
---|
| 512 | if ( needs_main ) declsToAddBefore.push_back( main_decl ); |
---|
| 513 | declsToAddBefore.push_back( get_decl ); |
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| 514 | |
---|
| 515 | return get_decl; |
---|
| 516 | } |
---|
| 517 | |
---|
| 518 | ConcurrentSueKeyword::StructAndField ConcurrentSueKeyword::addField( |
---|
| 519 | const ast::StructDecl * decl ) { |
---|
| 520 | const CodeLocation & location = decl->location; |
---|
| 521 | |
---|
| 522 | ast::ObjectDecl * field = new ast::ObjectDecl( |
---|
| 523 | location, |
---|
| 524 | field_name, |
---|
[e8616b6] | 525 | new ast::StructInstType( type_decl ) |
---|
[4f6dda0] | 526 | ); |
---|
| 527 | |
---|
| 528 | auto mutDecl = ast::mutate( decl ); |
---|
| 529 | mutDecl->members.push_back( field ); |
---|
| 530 | |
---|
| 531 | return {mutDecl, field}; |
---|
| 532 | } |
---|
| 533 | |
---|
| 534 | void ConcurrentSueKeyword::addGetRoutines( |
---|
| 535 | const ast::ObjectDecl * field, const ast::FunctionDecl * forward ) { |
---|
[b2ecd48] | 536 | // Clone the signature and then build the body. |
---|
| 537 | ast::FunctionDecl * decl = ast::deepCopy( forward ); |
---|
| 538 | |
---|
[4f6dda0] | 539 | // Say it is generated at the "same" places as the forward declaration. |
---|
[b2ecd48] | 540 | const CodeLocation & location = decl->location; |
---|
[4f6dda0] | 541 | |
---|
[b2ecd48] | 542 | const ast::DeclWithType * param = decl->params.front(); |
---|
[4f6dda0] | 543 | ast::Stmt * stmt = new ast::ReturnStmt( location, |
---|
| 544 | new ast::AddressExpr( location, |
---|
| 545 | new ast::MemberExpr( location, |
---|
| 546 | field, |
---|
| 547 | new ast::CastExpr( location, |
---|
| 548 | new ast::VariableExpr( location, param ), |
---|
| 549 | ast::deepCopy( param->get_type()->stripReferences() ), |
---|
| 550 | ast::ExplicitCast |
---|
| 551 | ) |
---|
| 552 | ) |
---|
| 553 | ) |
---|
| 554 | ); |
---|
| 555 | |
---|
| 556 | decl->stmts = new ast::CompoundStmt( location, { stmt } ); |
---|
| 557 | declsToAddAfter.push_back( decl ); |
---|
| 558 | } |
---|
| 559 | |
---|
| 560 | void ConcurrentSueKeyword::addLockUnlockRoutines( |
---|
| 561 | const ast::StructDecl * decl ) { |
---|
| 562 | // This should only be used on monitors. |
---|
| 563 | assert( ast::AggregateDecl::Monitor == cast_target ); |
---|
| 564 | |
---|
| 565 | const CodeLocation & location = decl->location; |
---|
| 566 | |
---|
| 567 | // The parameter for both routines. |
---|
| 568 | ast::ObjectDecl * this_decl = new ast::ObjectDecl( |
---|
| 569 | location, |
---|
| 570 | "this", |
---|
[e8616b6] | 571 | new ast::ReferenceType( new ast::StructInstType( decl ) ) |
---|
[4f6dda0] | 572 | ); |
---|
| 573 | |
---|
| 574 | ast::FunctionDecl * lock_decl = new ast::FunctionDecl( |
---|
| 575 | location, |
---|
| 576 | "lock", |
---|
| 577 | { /* forall */ }, |
---|
| 578 | { |
---|
| 579 | // Copy the declaration of this. |
---|
| 580 | ast::deepCopy( this_decl ), |
---|
| 581 | }, |
---|
| 582 | { /* returns */ }, |
---|
| 583 | nullptr, |
---|
| 584 | ast::Storage::Static, |
---|
| 585 | ast::Linkage::Cforall, |
---|
| 586 | { /* attributes */ }, |
---|
| 587 | ast::Function::Inline |
---|
| 588 | ); |
---|
| 589 | lock_decl = fixupGenerics( lock_decl, decl ); |
---|
| 590 | |
---|
| 591 | lock_decl->stmts = new ast::CompoundStmt( location, { |
---|
| 592 | new ast::ExprStmt( location, |
---|
| 593 | new ast::UntypedExpr( location, |
---|
| 594 | new ast::NameExpr( location, "lock" ), |
---|
| 595 | { |
---|
| 596 | new ast::UntypedExpr( location, |
---|
| 597 | new ast::NameExpr( location, "get_monitor" ), |
---|
| 598 | { new ast::VariableExpr( location, |
---|
| 599 | InitTweak::getParamThis( lock_decl ) ) } |
---|
| 600 | ) |
---|
| 601 | } |
---|
| 602 | ) |
---|
| 603 | ) |
---|
| 604 | } ); |
---|
| 605 | |
---|
| 606 | ast::FunctionDecl * unlock_decl = new ast::FunctionDecl( |
---|
| 607 | location, |
---|
| 608 | "unlock", |
---|
| 609 | { /* forall */ }, |
---|
| 610 | { |
---|
| 611 | // Last use, consume the declaration of this. |
---|
| 612 | this_decl, |
---|
| 613 | }, |
---|
| 614 | { /* returns */ }, |
---|
| 615 | nullptr, |
---|
| 616 | ast::Storage::Static, |
---|
| 617 | ast::Linkage::Cforall, |
---|
| 618 | { /* attributes */ }, |
---|
| 619 | ast::Function::Inline |
---|
| 620 | ); |
---|
| 621 | unlock_decl = fixupGenerics( unlock_decl, decl ); |
---|
| 622 | |
---|
| 623 | unlock_decl->stmts = new ast::CompoundStmt( location, { |
---|
| 624 | new ast::ExprStmt( location, |
---|
| 625 | new ast::UntypedExpr( location, |
---|
| 626 | new ast::NameExpr( location, "unlock" ), |
---|
| 627 | { |
---|
| 628 | new ast::UntypedExpr( location, |
---|
| 629 | new ast::NameExpr( location, "get_monitor" ), |
---|
| 630 | { new ast::VariableExpr( location, |
---|
| 631 | InitTweak::getParamThis( unlock_decl ) ) } |
---|
| 632 | ) |
---|
| 633 | } |
---|
| 634 | ) |
---|
| 635 | ) |
---|
| 636 | } ); |
---|
| 637 | |
---|
| 638 | declsToAddAfter.push_back( lock_decl ); |
---|
| 639 | declsToAddAfter.push_back( unlock_decl ); |
---|
| 640 | } |
---|
| 641 | |
---|
| 642 | |
---|
| 643 | // -------------------------------------------------------------------------- |
---|
| 644 | struct SuspendKeyword final : |
---|
| 645 | public ast::WithStmtsToAdd<>, public ast::WithGuards { |
---|
| 646 | SuspendKeyword() = default; |
---|
| 647 | virtual ~SuspendKeyword() = default; |
---|
| 648 | |
---|
| 649 | void previsit( const ast::FunctionDecl * ); |
---|
| 650 | const ast::DeclWithType * postvisit( const ast::FunctionDecl * ); |
---|
| 651 | const ast::Stmt * postvisit( const ast::SuspendStmt * ); |
---|
| 652 | |
---|
| 653 | private: |
---|
| 654 | bool is_real_suspend( const ast::FunctionDecl * ); |
---|
| 655 | |
---|
| 656 | const ast::Stmt * make_generator_suspend( const ast::SuspendStmt * ); |
---|
| 657 | const ast::Stmt * make_coroutine_suspend( const ast::SuspendStmt * ); |
---|
| 658 | |
---|
| 659 | struct LabelPair { |
---|
| 660 | ast::Label obj; |
---|
| 661 | int idx; |
---|
| 662 | }; |
---|
| 663 | |
---|
| 664 | LabelPair make_label(const ast::Stmt * stmt ) { |
---|
| 665 | labels.push_back( ControlStruct::newLabel( "generator", stmt ) ); |
---|
| 666 | return { labels.back(), int(labels.size()) }; |
---|
| 667 | } |
---|
| 668 | |
---|
| 669 | const ast::DeclWithType * in_generator = nullptr; |
---|
| 670 | const ast::FunctionDecl * decl_suspend = nullptr; |
---|
| 671 | std::vector<ast::Label> labels; |
---|
| 672 | }; |
---|
| 673 | |
---|
| 674 | void SuspendKeyword::previsit( const ast::FunctionDecl * decl ) { |
---|
| 675 | GuardValue( in_generator ); in_generator = nullptr; |
---|
| 676 | |
---|
| 677 | // If it is the real suspend, grab it if we don't have one already. |
---|
| 678 | if ( is_real_suspend( decl ) ) { |
---|
| 679 | decl_suspend = decl_suspend ? decl_suspend : decl; |
---|
| 680 | return; |
---|
| 681 | } |
---|
| 682 | |
---|
| 683 | // Otherwise check if this is a generator main and, if so, handle it. |
---|
| 684 | auto param = isMainFor( decl, ast::AggregateDecl::Generator ); |
---|
| 685 | if ( !param ) return; |
---|
| 686 | |
---|
| 687 | if ( 0 != decl->returns.size() ) { |
---|
| 688 | SemanticError( decl->location, "Generator main must return void" ); |
---|
| 689 | } |
---|
| 690 | |
---|
| 691 | in_generator = param; |
---|
| 692 | GuardValue( labels ); labels.clear(); |
---|
| 693 | } |
---|
| 694 | |
---|
| 695 | const ast::DeclWithType * SuspendKeyword::postvisit( |
---|
| 696 | const ast::FunctionDecl * decl ) { |
---|
| 697 | // Only modify a full definition of a generator with states. |
---|
| 698 | if ( !decl->stmts || !in_generator || labels.empty() ) return decl; |
---|
| 699 | |
---|
| 700 | const CodeLocation & location = decl->location; |
---|
| 701 | |
---|
| 702 | // Create a new function body: |
---|
| 703 | // static void * __generator_labels[] = {&&s0, &&s1, ...}; |
---|
| 704 | // void * __generator_label = __generator_labels[GEN.__generator_state]; |
---|
| 705 | // goto * __generator_label; |
---|
| 706 | // s0: ; |
---|
| 707 | // OLD_BODY |
---|
| 708 | |
---|
| 709 | // This is the null statement inserted right before the body. |
---|
| 710 | ast::NullStmt * noop = new ast::NullStmt( location ); |
---|
| 711 | noop->labels.push_back( ControlStruct::newLabel( "generator", noop ) ); |
---|
| 712 | const ast::Label & first_label = noop->labels.back(); |
---|
| 713 | |
---|
| 714 | // Add each label to the init, starting with the first label. |
---|
| 715 | std::vector<ast::ptr<ast::Init>> inits = { |
---|
| 716 | new ast::SingleInit( location, |
---|
| 717 | new ast::LabelAddressExpr( location, copy( first_label ) ) ) }; |
---|
| 718 | // Then go through all the stored labels, and clear the store. |
---|
| 719 | for ( auto && label : labels ) { |
---|
| 720 | inits.push_back( new ast::SingleInit( label.location, |
---|
| 721 | new ast::LabelAddressExpr( label.location, std::move( label ) |
---|
| 722 | ) ) ); |
---|
| 723 | } |
---|
| 724 | labels.clear(); |
---|
| 725 | // Then construct the initializer itself. |
---|
| 726 | auto init = new ast::ListInit( location, std::move( inits ) ); |
---|
| 727 | |
---|
| 728 | ast::ObjectDecl * generatorLabels = new ast::ObjectDecl( |
---|
| 729 | location, |
---|
| 730 | "__generator_labels", |
---|
| 731 | new ast::ArrayType( |
---|
| 732 | new ast::PointerType( new ast::VoidType() ), |
---|
| 733 | nullptr, |
---|
| 734 | ast::FixedLen, |
---|
| 735 | ast::DynamicDim |
---|
| 736 | ), |
---|
| 737 | init, |
---|
| 738 | ast::Storage::Classes(), |
---|
| 739 | ast::Linkage::AutoGen |
---|
| 740 | ); |
---|
| 741 | |
---|
| 742 | ast::ObjectDecl * generatorLabel = new ast::ObjectDecl( |
---|
| 743 | location, |
---|
| 744 | "__generator_label", |
---|
| 745 | new ast::PointerType( new ast::VoidType() ), |
---|
| 746 | new ast::SingleInit( location, |
---|
| 747 | new ast::UntypedExpr( location, |
---|
| 748 | new ast::NameExpr( location, "?[?]" ), |
---|
| 749 | { |
---|
| 750 | // TODO: Could be a variable expr. |
---|
| 751 | new ast::NameExpr( location, "__generator_labels" ), |
---|
| 752 | new ast::UntypedMemberExpr( location, |
---|
| 753 | new ast::NameExpr( location, "__generator_state" ), |
---|
| 754 | new ast::VariableExpr( location, in_generator ) |
---|
| 755 | ) |
---|
| 756 | } |
---|
| 757 | ) |
---|
| 758 | ), |
---|
| 759 | ast::Storage::Classes(), |
---|
| 760 | ast::Linkage::AutoGen |
---|
| 761 | ); |
---|
| 762 | |
---|
| 763 | ast::BranchStmt * theGoTo = new ast::BranchStmt( |
---|
| 764 | location, new ast::VariableExpr( location, generatorLabel ) |
---|
| 765 | ); |
---|
| 766 | |
---|
| 767 | // The noop goes here in order. |
---|
| 768 | |
---|
| 769 | ast::CompoundStmt * body = new ast::CompoundStmt( location, { |
---|
| 770 | { new ast::DeclStmt( location, generatorLabels ) }, |
---|
| 771 | { new ast::DeclStmt( location, generatorLabel ) }, |
---|
| 772 | { theGoTo }, |
---|
| 773 | { noop }, |
---|
| 774 | { decl->stmts }, |
---|
| 775 | } ); |
---|
| 776 | |
---|
| 777 | auto mutDecl = ast::mutate( decl ); |
---|
| 778 | mutDecl->stmts = body; |
---|
| 779 | return mutDecl; |
---|
| 780 | } |
---|
| 781 | |
---|
| 782 | const ast::Stmt * SuspendKeyword::postvisit( const ast::SuspendStmt * stmt ) { |
---|
[835d6e8] | 783 | switch ( stmt->kind ) { |
---|
[4f6dda0] | 784 | case ast::SuspendStmt::None: |
---|
| 785 | // Use the context to determain the implicit target. |
---|
| 786 | if ( in_generator ) { |
---|
| 787 | return make_generator_suspend( stmt ); |
---|
| 788 | } else { |
---|
| 789 | return make_coroutine_suspend( stmt ); |
---|
| 790 | } |
---|
| 791 | case ast::SuspendStmt::Coroutine: |
---|
| 792 | return make_coroutine_suspend( stmt ); |
---|
| 793 | case ast::SuspendStmt::Generator: |
---|
| 794 | // Generator suspends must be directly in a generator. |
---|
| 795 | if ( !in_generator ) SemanticError( stmt->location, "'suspend generator' must be used inside main of generator type." ); |
---|
| 796 | return make_generator_suspend( stmt ); |
---|
| 797 | } |
---|
| 798 | assert( false ); |
---|
| 799 | return stmt; |
---|
| 800 | } |
---|
| 801 | |
---|
| 802 | /// Find the real/official suspend declaration. |
---|
| 803 | bool SuspendKeyword::is_real_suspend( const ast::FunctionDecl * decl ) { |
---|
| 804 | return ( !decl->linkage.is_mangled |
---|
| 805 | && 0 == decl->params.size() |
---|
| 806 | && 0 == decl->returns.size() |
---|
| 807 | && "__cfactx_suspend" == decl->name ); |
---|
| 808 | } |
---|
| 809 | |
---|
| 810 | const ast::Stmt * SuspendKeyword::make_generator_suspend( |
---|
| 811 | const ast::SuspendStmt * stmt ) { |
---|
| 812 | assert( in_generator ); |
---|
| 813 | // Target code is: |
---|
| 814 | // GEN.__generator_state = X; |
---|
| 815 | // THEN |
---|
| 816 | // return; |
---|
| 817 | // __gen_X:; |
---|
| 818 | |
---|
| 819 | const CodeLocation & location = stmt->location; |
---|
| 820 | |
---|
| 821 | LabelPair label = make_label( stmt ); |
---|
| 822 | |
---|
| 823 | // This is the context saving statement. |
---|
| 824 | stmtsToAddBefore.push_back( new ast::ExprStmt( location, |
---|
| 825 | new ast::UntypedExpr( location, |
---|
| 826 | new ast::NameExpr( location, "?=?" ), |
---|
| 827 | { |
---|
| 828 | new ast::UntypedMemberExpr( location, |
---|
| 829 | new ast::NameExpr( location, "__generator_state" ), |
---|
| 830 | new ast::VariableExpr( location, in_generator ) |
---|
| 831 | ), |
---|
| 832 | ast::ConstantExpr::from_int( location, label.idx ), |
---|
| 833 | } |
---|
| 834 | ) |
---|
| 835 | ) ); |
---|
| 836 | |
---|
| 837 | // The THEN component is conditional (return is not). |
---|
| 838 | if ( stmt->then ) { |
---|
| 839 | stmtsToAddBefore.push_back( stmt->then.get() ); |
---|
| 840 | } |
---|
| 841 | stmtsToAddBefore.push_back( new ast::ReturnStmt( location, nullptr ) ); |
---|
| 842 | |
---|
| 843 | // The null statement replaces the old suspend statement. |
---|
| 844 | return new ast::NullStmt( location, { label.obj } ); |
---|
| 845 | } |
---|
| 846 | |
---|
| 847 | const ast::Stmt * SuspendKeyword::make_coroutine_suspend( |
---|
| 848 | const ast::SuspendStmt * stmt ) { |
---|
| 849 | // The only thing we need from the old statement is the location. |
---|
| 850 | const CodeLocation & location = stmt->location; |
---|
| 851 | |
---|
| 852 | if ( !decl_suspend ) { |
---|
| 853 | SemanticError( location, "suspend keyword applied to coroutines requires coroutines to be in scope, add #include <coroutine.hfa>\n" ); |
---|
| 854 | } |
---|
| 855 | if ( stmt->then ) { |
---|
| 856 | SemanticError( location, "Compound statement following coroutines is not implemented." ); |
---|
| 857 | } |
---|
| 858 | |
---|
| 859 | return new ast::ExprStmt( location, |
---|
| 860 | new ast::UntypedExpr( location, |
---|
| 861 | ast::VariableExpr::functionPointer( location, decl_suspend ) ) |
---|
| 862 | ); |
---|
| 863 | } |
---|
| 864 | |
---|
[2cf3b87] | 865 | // -------------------------------------------------------------------------- |
---|
[080d2d7] | 866 | struct MutexKeyword final : public ast::WithDeclsToAdd<> { |
---|
[2cf3b87] | 867 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * decl ); |
---|
| 868 | void postvisit( const ast::StructDecl * decl ); |
---|
| 869 | const ast::Stmt * postvisit( const ast::MutexStmt * stmt ); |
---|
| 870 | |
---|
[56f519b] | 871 | static std::vector<const ast::DeclWithType *> findMutexArgs( |
---|
[2cf3b87] | 872 | const ast::FunctionDecl * decl, bool & first ); |
---|
[56f519b] | 873 | static void validate( const ast::DeclWithType * decl ); |
---|
| 874 | |
---|
[2cf3b87] | 875 | ast::CompoundStmt * addDtorStatements( const ast::FunctionDecl* func, const ast::CompoundStmt *, const std::vector<const ast::DeclWithType *> &); |
---|
| 876 | ast::CompoundStmt * addStatements( const ast::FunctionDecl* func, const ast::CompoundStmt *, const std::vector<const ast::DeclWithType *> &); |
---|
| 877 | ast::CompoundStmt * addStatements( const ast::CompoundStmt * body, const std::vector<ast::ptr<ast::Expr>> & args ); |
---|
| 878 | ast::CompoundStmt * addThreadDtorStatements( const ast::FunctionDecl* func, const ast::CompoundStmt * body, const std::vector<const ast::DeclWithType *> & args ); |
---|
[080d2d7] | 879 | ast::ExprStmt * genVirtLockUnlockExpr( const std::string & fnName, ast::ptr<ast::Expr> expr, const CodeLocation & location, ast::Expr * param); |
---|
| 880 | ast::IfStmt * genTypeDiscrimLockUnlock( const std::string & fnName, const std::vector<ast::ptr<ast::Expr>> & args, const CodeLocation & location, ast::UntypedExpr * thisParam ); |
---|
[56f519b] | 881 | private: |
---|
[2cf3b87] | 882 | const ast::StructDecl * monitor_decl = nullptr; |
---|
| 883 | const ast::StructDecl * guard_decl = nullptr; |
---|
| 884 | const ast::StructDecl * dtor_guard_decl = nullptr; |
---|
| 885 | const ast::StructDecl * thread_guard_decl = nullptr; |
---|
| 886 | const ast::StructDecl * lock_guard_decl = nullptr; |
---|
| 887 | |
---|
| 888 | static ast::ptr<ast::Type> generic_func; |
---|
[080d2d7] | 889 | |
---|
| 890 | UniqueName mutex_func_namer = UniqueName("__lock_unlock_curr"); |
---|
[2cf3b87] | 891 | }; |
---|
| 892 | |
---|
| 893 | const ast::FunctionDecl * MutexKeyword::postvisit( |
---|
| 894 | const ast::FunctionDecl * decl ) { |
---|
| 895 | bool is_first_argument_mutex = false; |
---|
| 896 | const std::vector<const ast::DeclWithType *> mutexArgs = |
---|
| 897 | findMutexArgs( decl, is_first_argument_mutex ); |
---|
| 898 | bool const isDtor = CodeGen::isDestructor( decl->name ); |
---|
| 899 | |
---|
| 900 | // Does this function have any mutex arguments that connect to monitors? |
---|
| 901 | if ( mutexArgs.empty() ) { |
---|
| 902 | // If this is the destructor for a monitor it must be mutex. |
---|
| 903 | if ( isDtor ) { |
---|
| 904 | // This reflects MutexKeyword::validate, but no error messages. |
---|
| 905 | const ast::Type * type = decl->type->params.front(); |
---|
| 906 | |
---|
| 907 | // If it's a copy, it's not a mutex. |
---|
| 908 | const ast::ReferenceType * refType = dynamic_cast<const ast::ReferenceType *>( type ); |
---|
| 909 | if ( nullptr == refType ) { |
---|
| 910 | return decl; |
---|
| 911 | } |
---|
| 912 | |
---|
| 913 | // If it is not pointing directly to a type, it's not a mutex. |
---|
| 914 | auto base = refType->base; |
---|
| 915 | if ( base.as<ast::ReferenceType>() ) return decl; |
---|
| 916 | if ( base.as<ast::PointerType>() ) return decl; |
---|
| 917 | |
---|
| 918 | // If it is not a struct, it's not a mutex. |
---|
| 919 | auto baseStruct = base.as<ast::StructInstType>(); |
---|
| 920 | if ( nullptr == baseStruct ) return decl; |
---|
| 921 | |
---|
| 922 | // If it is a monitor, then it is a monitor. |
---|
| 923 | if( baseStruct->base->is_monitor() || baseStruct->base->is_thread() ) { |
---|
| 924 | SemanticError( decl, "destructors for structures declared as \"monitor\" must use mutex parameters\n" ); |
---|
| 925 | } |
---|
| 926 | } |
---|
| 927 | return decl; |
---|
| 928 | } |
---|
| 929 | |
---|
| 930 | // Monitors can't be constructed with mutual exclusion. |
---|
[56f519b] | 931 | if ( CodeGen::isConstructor( decl->name ) && is_first_argument_mutex ) { |
---|
| 932 | SemanticError( decl, "constructors cannot have mutex parameters\n" ); |
---|
[2cf3b87] | 933 | } |
---|
| 934 | |
---|
| 935 | // It makes no sense to have multiple mutex parameters for the destructor. |
---|
| 936 | if ( isDtor && mutexArgs.size() != 1 ) { |
---|
[56f519b] | 937 | SemanticError( decl, "destructors can only have 1 mutex argument\n" ); |
---|
[2cf3b87] | 938 | } |
---|
| 939 | |
---|
| 940 | // Make sure all the mutex arguments are monitors. |
---|
| 941 | for ( auto arg : mutexArgs ) { |
---|
| 942 | validate( arg ); |
---|
| 943 | } |
---|
| 944 | |
---|
| 945 | // Check to see if the body needs to be instrument the body. |
---|
| 946 | const ast::CompoundStmt * body = decl->stmts; |
---|
| 947 | if ( !body ) return decl; |
---|
| 948 | |
---|
| 949 | // Check to if the required headers have been seen. |
---|
| 950 | if ( !monitor_decl || !guard_decl || !dtor_guard_decl ) { |
---|
| 951 | SemanticError( decl, "mutex keyword requires monitors to be in scope, add #include <monitor.hfa>\n" ); |
---|
| 952 | } |
---|
| 953 | |
---|
| 954 | // Instrument the body. |
---|
| 955 | ast::CompoundStmt * newBody = nullptr; |
---|
| 956 | if ( isDtor && isThread( mutexArgs.front() ) ) { |
---|
| 957 | if ( !thread_guard_decl ) { |
---|
| 958 | SemanticError( decl, "thread destructor requires threads to be in scope, add #include <thread.hfa>\n" ); |
---|
| 959 | } |
---|
| 960 | newBody = addThreadDtorStatements( decl, body, mutexArgs ); |
---|
| 961 | } else if ( isDtor ) { |
---|
| 962 | newBody = addDtorStatements( decl, body, mutexArgs ); |
---|
| 963 | } else { |
---|
| 964 | newBody = addStatements( decl, body, mutexArgs ); |
---|
| 965 | } |
---|
| 966 | assert( newBody ); |
---|
| 967 | return ast::mutate_field( decl, &ast::FunctionDecl::stmts, newBody ); |
---|
| 968 | } |
---|
| 969 | |
---|
| 970 | void MutexKeyword::postvisit( const ast::StructDecl * decl ) { |
---|
| 971 | if ( !decl->body ) { |
---|
| 972 | return; |
---|
| 973 | } else if ( decl->name == "monitor$" ) { |
---|
| 974 | assert( !monitor_decl ); |
---|
| 975 | monitor_decl = decl; |
---|
| 976 | } else if ( decl->name == "monitor_guard_t" ) { |
---|
| 977 | assert( !guard_decl ); |
---|
| 978 | guard_decl = decl; |
---|
| 979 | } else if ( decl->name == "monitor_dtor_guard_t" ) { |
---|
| 980 | assert( !dtor_guard_decl ); |
---|
| 981 | dtor_guard_decl = decl; |
---|
| 982 | } else if ( decl->name == "thread_dtor_guard_t" ) { |
---|
| 983 | assert( !thread_guard_decl ); |
---|
| 984 | thread_guard_decl = decl; |
---|
| 985 | } else if ( decl->name == "__mutex_stmt_lock_guard" ) { |
---|
| 986 | assert( !lock_guard_decl ); |
---|
| 987 | lock_guard_decl = decl; |
---|
| 988 | } |
---|
| 989 | } |
---|
| 990 | |
---|
| 991 | const ast::Stmt * MutexKeyword::postvisit( const ast::MutexStmt * stmt ) { |
---|
[41d3c8d] | 992 | if ( !lock_guard_decl ) { |
---|
| 993 | SemanticError( stmt->location, "mutex stmt requires a header, add #include <mutex_stmt.hfa>\n" ); |
---|
| 994 | } |
---|
[2cf3b87] | 995 | ast::CompoundStmt * body = |
---|
| 996 | new ast::CompoundStmt( stmt->location, { stmt->stmt } ); |
---|
[080d2d7] | 997 | |
---|
| 998 | return addStatements( body, stmt->mutexObjs );; |
---|
[2cf3b87] | 999 | } |
---|
| 1000 | |
---|
| 1001 | std::vector<const ast::DeclWithType *> MutexKeyword::findMutexArgs( |
---|
| 1002 | const ast::FunctionDecl * decl, bool & first ) { |
---|
| 1003 | std::vector<const ast::DeclWithType *> mutexArgs; |
---|
| 1004 | |
---|
| 1005 | bool once = true; |
---|
| 1006 | for ( auto arg : decl->params ) { |
---|
| 1007 | const ast::Type * type = arg->get_type(); |
---|
[56f519b] | 1008 | if ( type->is_mutex() ) { |
---|
| 1009 | if ( once ) first = true; |
---|
| 1010 | mutexArgs.push_back( arg.get() ); |
---|
[2cf3b87] | 1011 | } |
---|
[56f519b] | 1012 | once = false; |
---|
[2cf3b87] | 1013 | } |
---|
| 1014 | return mutexArgs; |
---|
| 1015 | } |
---|
| 1016 | |
---|
| 1017 | void MutexKeyword::validate( const ast::DeclWithType * decl ) { |
---|
| 1018 | const ast::Type * type = decl->get_type(); |
---|
| 1019 | |
---|
| 1020 | // If it's a copy, it's not a mutex. |
---|
| 1021 | const ast::ReferenceType * refType = dynamic_cast<const ast::ReferenceType *>( type ); |
---|
| 1022 | if ( nullptr == refType ) { |
---|
| 1023 | SemanticError( decl, "Mutex argument must be of reference type " ); |
---|
| 1024 | } |
---|
| 1025 | |
---|
| 1026 | // If it is not pointing directly to a type, it's not a mutex. |
---|
| 1027 | auto base = refType->base; |
---|
| 1028 | if ( base.as<ast::ReferenceType>() || base.as<ast::PointerType>() ) { |
---|
| 1029 | SemanticError( decl, "Mutex argument have exactly one level of indirection " ); |
---|
| 1030 | } |
---|
| 1031 | |
---|
| 1032 | // If it is not a struct, it's not a mutex. |
---|
| 1033 | auto baseStruct = base.as<ast::StructInstType>(); |
---|
| 1034 | if ( nullptr == baseStruct ) return; |
---|
| 1035 | |
---|
| 1036 | // Make sure that only the outer reference is mutex. |
---|
| 1037 | if( baseStruct->is_mutex() ) { |
---|
| 1038 | SemanticError( decl, "mutex keyword may only appear once per argument " ); |
---|
| 1039 | } |
---|
| 1040 | } |
---|
| 1041 | |
---|
| 1042 | ast::CompoundStmt * MutexKeyword::addDtorStatements( |
---|
| 1043 | const ast::FunctionDecl* func, const ast::CompoundStmt * body, |
---|
| 1044 | const std::vector<const ast::DeclWithType *> & args ) { |
---|
| 1045 | ast::Type * argType = ast::shallowCopy( args.front()->get_type() ); |
---|
| 1046 | argType->set_mutex( false ); |
---|
| 1047 | |
---|
| 1048 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
---|
| 1049 | |
---|
| 1050 | // Generated code goes near the beginning of body: |
---|
| 1051 | const CodeLocation & location = mutBody->location; |
---|
| 1052 | |
---|
| 1053 | const ast::ObjectDecl * monitor = new ast::ObjectDecl( |
---|
| 1054 | location, |
---|
| 1055 | "__monitor", |
---|
| 1056 | new ast::PointerType( new ast::StructInstType( monitor_decl ) ), |
---|
| 1057 | new ast::SingleInit( |
---|
| 1058 | location, |
---|
| 1059 | new ast::UntypedExpr( |
---|
| 1060 | location, |
---|
| 1061 | new ast::NameExpr( location, "get_monitor" ), |
---|
| 1062 | { new ast::CastExpr( |
---|
| 1063 | location, |
---|
| 1064 | new ast::VariableExpr( location, args.front() ), |
---|
| 1065 | argType, ast::ExplicitCast |
---|
| 1066 | ) } |
---|
| 1067 | ) |
---|
[e8616b6] | 1068 | ) |
---|
[2cf3b87] | 1069 | ); |
---|
| 1070 | |
---|
| 1071 | assert( generic_func ); |
---|
| 1072 | |
---|
| 1073 | // In reverse order: |
---|
| 1074 | // monitor_dtor_guard_t __guard = { __monitor, func, false }; |
---|
| 1075 | mutBody->push_front( |
---|
| 1076 | new ast::DeclStmt( location, new ast::ObjectDecl( |
---|
| 1077 | location, |
---|
| 1078 | "__guard", |
---|
| 1079 | new ast::StructInstType( dtor_guard_decl ), |
---|
| 1080 | new ast::ListInit( |
---|
| 1081 | location, |
---|
| 1082 | { |
---|
| 1083 | new ast::SingleInit( location, |
---|
[4f6dda0] | 1084 | new ast::AddressExpr( location, |
---|
[2cf3b87] | 1085 | new ast::VariableExpr( location, monitor ) ) ), |
---|
| 1086 | new ast::SingleInit( location, |
---|
| 1087 | new ast::CastExpr( location, |
---|
| 1088 | new ast::VariableExpr( location, func ), |
---|
| 1089 | generic_func, |
---|
| 1090 | ast::ExplicitCast ) ), |
---|
| 1091 | new ast::SingleInit( location, |
---|
| 1092 | ast::ConstantExpr::from_bool( location, false ) ), |
---|
| 1093 | }, |
---|
| 1094 | {}, |
---|
| 1095 | ast::MaybeConstruct |
---|
[e8616b6] | 1096 | ) |
---|
[2cf3b87] | 1097 | )) |
---|
| 1098 | ); |
---|
| 1099 | |
---|
| 1100 | // monitor$ * __monitor = get_monitor(a); |
---|
| 1101 | mutBody->push_front( new ast::DeclStmt( location, monitor ) ); |
---|
| 1102 | |
---|
| 1103 | return mutBody; |
---|
| 1104 | } |
---|
| 1105 | |
---|
| 1106 | ast::CompoundStmt * MutexKeyword::addStatements( |
---|
| 1107 | const ast::FunctionDecl* func, const ast::CompoundStmt * body, |
---|
| 1108 | const std::vector<const ast::DeclWithType * > & args ) { |
---|
| 1109 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
---|
| 1110 | |
---|
| 1111 | // Code is generated near the beginning of the compound statement. |
---|
| 1112 | const CodeLocation & location = mutBody->location; |
---|
| 1113 | |
---|
| 1114 | // Make pointer to the monitors. |
---|
| 1115 | ast::ObjectDecl * monitors = new ast::ObjectDecl( |
---|
| 1116 | location, |
---|
| 1117 | "__monitors", |
---|
| 1118 | new ast::ArrayType( |
---|
| 1119 | new ast::PointerType( |
---|
| 1120 | new ast::StructInstType( monitor_decl ) |
---|
| 1121 | ), |
---|
| 1122 | ast::ConstantExpr::from_ulong( location, args.size() ), |
---|
| 1123 | ast::FixedLen, |
---|
| 1124 | ast::DynamicDim |
---|
| 1125 | ), |
---|
| 1126 | new ast::ListInit( |
---|
| 1127 | location, |
---|
| 1128 | map_range<std::vector<ast::ptr<ast::Init>>>( |
---|
| 1129 | args, |
---|
| 1130 | []( const ast::DeclWithType * decl ) { |
---|
| 1131 | return new ast::SingleInit( |
---|
| 1132 | decl->location, |
---|
| 1133 | new ast::UntypedExpr( |
---|
| 1134 | decl->location, |
---|
| 1135 | new ast::NameExpr( decl->location, "get_monitor" ), |
---|
| 1136 | { |
---|
| 1137 | new ast::CastExpr( |
---|
| 1138 | decl->location, |
---|
| 1139 | new ast::VariableExpr( decl->location, decl ), |
---|
| 1140 | decl->get_type(), |
---|
| 1141 | ast::ExplicitCast |
---|
| 1142 | ) |
---|
| 1143 | } |
---|
| 1144 | ) |
---|
| 1145 | ); |
---|
| 1146 | } |
---|
| 1147 | ) |
---|
[e8616b6] | 1148 | ) |
---|
[2cf3b87] | 1149 | ); |
---|
| 1150 | |
---|
| 1151 | assert( generic_func ); |
---|
| 1152 | |
---|
| 1153 | // In Reverse Order: |
---|
| 1154 | mutBody->push_front( |
---|
| 1155 | new ast::DeclStmt( location, new ast::ObjectDecl( |
---|
| 1156 | location, |
---|
| 1157 | "__guard", |
---|
| 1158 | new ast::StructInstType( guard_decl ), |
---|
| 1159 | new ast::ListInit( |
---|
| 1160 | location, |
---|
| 1161 | { |
---|
| 1162 | new ast::SingleInit( location, |
---|
| 1163 | new ast::VariableExpr( location, monitors ) ), |
---|
| 1164 | new ast::SingleInit( location, |
---|
| 1165 | ast::ConstantExpr::from_ulong( location, args.size() ) ), |
---|
| 1166 | new ast::SingleInit( location, new ast::CastExpr( |
---|
| 1167 | location, |
---|
| 1168 | new ast::VariableExpr( location, func ), |
---|
| 1169 | generic_func, |
---|
| 1170 | ast::ExplicitCast |
---|
| 1171 | ) ), |
---|
| 1172 | }, |
---|
| 1173 | {}, |
---|
| 1174 | ast::MaybeConstruct |
---|
[e8616b6] | 1175 | ) |
---|
[2cf3b87] | 1176 | )) |
---|
| 1177 | ); |
---|
| 1178 | |
---|
| 1179 | // monitor$ * __monitors[] = { get_monitor(a), get_monitor(b) }; |
---|
| 1180 | mutBody->push_front( new ast::DeclStmt( location, monitors ) ); |
---|
| 1181 | |
---|
| 1182 | return mutBody; |
---|
| 1183 | } |
---|
| 1184 | |
---|
[080d2d7] | 1185 | // generates a cast to the void ptr to the appropriate lock type and dereferences it before calling lock or unlock on it |
---|
| 1186 | // used to undo the type erasure done by storing all the lock pointers as void |
---|
| 1187 | ast::ExprStmt * MutexKeyword::genVirtLockUnlockExpr( const std::string & fnName, ast::ptr<ast::Expr> expr, const CodeLocation & location, ast::Expr * param ) { |
---|
| 1188 | return new ast::ExprStmt( location, |
---|
| 1189 | new ast::UntypedExpr( location, |
---|
| 1190 | new ast::NameExpr( location, fnName ), { |
---|
| 1191 | ast::UntypedExpr::createDeref( |
---|
| 1192 | location, |
---|
| 1193 | new ast::CastExpr( location, |
---|
| 1194 | param, |
---|
| 1195 | new ast::PointerType( new ast::TypeofType( new ast::UntypedExpr( |
---|
| 1196 | expr->location, |
---|
| 1197 | new ast::NameExpr( expr->location, "__get_mutexstmt_lock_type" ), |
---|
| 1198 | { expr } |
---|
| 1199 | ) ) ), |
---|
| 1200 | ast::GeneratedFlag::ExplicitCast |
---|
| 1201 | ) |
---|
| 1202 | ) |
---|
| 1203 | } |
---|
| 1204 | ) |
---|
| 1205 | ); |
---|
| 1206 | } |
---|
| 1207 | |
---|
| 1208 | ast::IfStmt * MutexKeyword::genTypeDiscrimLockUnlock( const std::string & fnName, const std::vector<ast::ptr<ast::Expr>> & args, const CodeLocation & location, ast::UntypedExpr * thisParam ) { |
---|
| 1209 | ast::IfStmt * outerLockIf = nullptr; |
---|
| 1210 | ast::IfStmt * lastLockIf = nullptr; |
---|
| 1211 | |
---|
| 1212 | //adds an if/elif clause for each lock to assign type from void ptr based on ptr address |
---|
| 1213 | for ( long unsigned int i = 0; i < args.size(); i++ ) { |
---|
| 1214 | |
---|
| 1215 | ast::UntypedExpr * ifCond = new ast::UntypedExpr( location, |
---|
| 1216 | new ast::NameExpr( location, "?==?" ), { |
---|
| 1217 | ast::deepCopy( thisParam ), |
---|
| 1218 | new ast::CastExpr( location, new ast::AddressExpr( location, args.at(i) ), new ast::PointerType( new ast::VoidType() )) |
---|
| 1219 | } |
---|
| 1220 | ); |
---|
| 1221 | |
---|
| 1222 | ast::IfStmt * currLockIf = new ast::IfStmt( |
---|
| 1223 | location, |
---|
| 1224 | ifCond, |
---|
| 1225 | genVirtLockUnlockExpr( fnName, args.at(i), location, ast::deepCopy( thisParam ) ) |
---|
| 1226 | ); |
---|
| 1227 | |
---|
| 1228 | if ( i == 0 ) { |
---|
| 1229 | outerLockIf = currLockIf; |
---|
| 1230 | } else { |
---|
| 1231 | // add ifstmt to else of previous stmt |
---|
| 1232 | lastLockIf->else_ = currLockIf; |
---|
| 1233 | } |
---|
| 1234 | |
---|
| 1235 | lastLockIf = currLockIf; |
---|
| 1236 | } |
---|
| 1237 | return outerLockIf; |
---|
| 1238 | } |
---|
| 1239 | |
---|
[d464b79] | 1240 | void flattenTuple( const ast::UntypedTupleExpr * tuple, std::vector<ast::ptr<ast::Expr>> & output ) { |
---|
| 1241 | for ( auto & expr : tuple->exprs ) { |
---|
| 1242 | const ast::UntypedTupleExpr * innerTuple = dynamic_cast<const ast::UntypedTupleExpr *>(expr.get()); |
---|
| 1243 | if ( innerTuple ) flattenTuple( innerTuple, output ); |
---|
| 1244 | else output.emplace_back( ast::deepCopy( expr )); |
---|
| 1245 | } |
---|
| 1246 | } |
---|
| 1247 | |
---|
[2cf3b87] | 1248 | ast::CompoundStmt * MutexKeyword::addStatements( |
---|
| 1249 | const ast::CompoundStmt * body, |
---|
| 1250 | const std::vector<ast::ptr<ast::Expr>> & args ) { |
---|
| 1251 | |
---|
| 1252 | // Code is generated near the beginning of the compound statement. |
---|
[080d2d7] | 1253 | const CodeLocation & location = body->location; |
---|
| 1254 | |
---|
| 1255 | // final body to return |
---|
| 1256 | ast::CompoundStmt * newBody = new ast::CompoundStmt( location ); |
---|
| 1257 | |
---|
| 1258 | // std::string lockFnName = mutex_func_namer.newName(); |
---|
| 1259 | // std::string unlockFnName = mutex_func_namer.newName(); |
---|
[2cf3b87] | 1260 | |
---|
[d464b79] | 1261 | // If any arguments to the mutex stmt are tuples, flatten them |
---|
| 1262 | std::vector<ast::ptr<ast::Expr>> flattenedArgs; |
---|
| 1263 | for ( auto & arg : args ) { |
---|
| 1264 | const ast::UntypedTupleExpr * tuple = dynamic_cast<const ast::UntypedTupleExpr *>(args.at(0).get()); |
---|
| 1265 | if ( tuple ) flattenTuple( tuple, flattenedArgs ); |
---|
| 1266 | else flattenedArgs.emplace_back( ast::deepCopy( arg )); |
---|
| 1267 | } |
---|
| 1268 | |
---|
[2cf3b87] | 1269 | // Make pointer to the monitors. |
---|
| 1270 | ast::ObjectDecl * monitors = new ast::ObjectDecl( |
---|
| 1271 | location, |
---|
| 1272 | "__monitors", |
---|
| 1273 | new ast::ArrayType( |
---|
| 1274 | new ast::PointerType( |
---|
[080d2d7] | 1275 | new ast::VoidType() |
---|
[2cf3b87] | 1276 | ), |
---|
[d464b79] | 1277 | ast::ConstantExpr::from_ulong( location, flattenedArgs.size() ), |
---|
[2cf3b87] | 1278 | ast::FixedLen, |
---|
| 1279 | ast::DynamicDim |
---|
| 1280 | ), |
---|
| 1281 | new ast::ListInit( |
---|
| 1282 | location, |
---|
| 1283 | map_range<std::vector<ast::ptr<ast::Init>>>( |
---|
[d464b79] | 1284 | flattenedArgs, [](const ast::Expr * expr) { |
---|
[2cf3b87] | 1285 | return new ast::SingleInit( |
---|
| 1286 | expr->location, |
---|
| 1287 | new ast::UntypedExpr( |
---|
| 1288 | expr->location, |
---|
[080d2d7] | 1289 | new ast::NameExpr( expr->location, "__get_mutexstmt_lock_ptr" ), |
---|
[2cf3b87] | 1290 | { expr } |
---|
| 1291 | ) |
---|
| 1292 | ); |
---|
| 1293 | } |
---|
| 1294 | ) |
---|
[e8616b6] | 1295 | ) |
---|
[2cf3b87] | 1296 | ); |
---|
| 1297 | |
---|
| 1298 | ast::StructInstType * lock_guard_struct = |
---|
| 1299 | new ast::StructInstType( lock_guard_decl ); |
---|
| 1300 | |
---|
[080d2d7] | 1301 | // use try stmts to lock and finally to unlock |
---|
| 1302 | ast::TryStmt * outerTry = nullptr; |
---|
| 1303 | ast::TryStmt * currentTry; |
---|
| 1304 | ast::CompoundStmt * lastBody = nullptr; |
---|
| 1305 | |
---|
| 1306 | // adds a nested try stmt for each lock we are locking |
---|
[d464b79] | 1307 | for ( long unsigned int i = 0; i < flattenedArgs.size(); i++ ) { |
---|
[080d2d7] | 1308 | ast::UntypedExpr * innerAccess = new ast::UntypedExpr( |
---|
| 1309 | location, |
---|
| 1310 | new ast::NameExpr( location,"?[?]" ), { |
---|
| 1311 | new ast::NameExpr( location, "__monitors" ), |
---|
| 1312 | ast::ConstantExpr::from_int( location, i ) |
---|
| 1313 | } |
---|
| 1314 | ); |
---|
| 1315 | |
---|
| 1316 | // make the try body |
---|
| 1317 | ast::CompoundStmt * currTryBody = new ast::CompoundStmt( location ); |
---|
[d464b79] | 1318 | ast::IfStmt * lockCall = genTypeDiscrimLockUnlock( "lock", flattenedArgs, location, innerAccess ); |
---|
[080d2d7] | 1319 | currTryBody->push_back( lockCall ); |
---|
| 1320 | |
---|
| 1321 | // make the finally stmt |
---|
| 1322 | ast::CompoundStmt * currFinallyBody = new ast::CompoundStmt( location ); |
---|
[d464b79] | 1323 | ast::IfStmt * unlockCall = genTypeDiscrimLockUnlock( "unlock", flattenedArgs, location, innerAccess ); |
---|
[080d2d7] | 1324 | currFinallyBody->push_back( unlockCall ); |
---|
| 1325 | |
---|
| 1326 | // construct the current try |
---|
[400b8be] | 1327 | currentTry = new ast::TryStmt( |
---|
| 1328 | location, |
---|
| 1329 | currTryBody, |
---|
| 1330 | {}, |
---|
| 1331 | new ast::FinallyClause( location, currFinallyBody ) |
---|
[080d2d7] | 1332 | ); |
---|
| 1333 | if ( i == 0 ) outerTry = currentTry; |
---|
| 1334 | else { |
---|
| 1335 | // pushback try into the body of the outer try |
---|
| 1336 | lastBody->push_back( currentTry ); |
---|
| 1337 | } |
---|
| 1338 | lastBody = currTryBody; |
---|
| 1339 | } |
---|
| 1340 | |
---|
| 1341 | // push body into innermost try body |
---|
| 1342 | if ( lastBody != nullptr ) { |
---|
| 1343 | lastBody->push_back( body ); |
---|
| 1344 | newBody->push_front( outerTry ); |
---|
[400b8be] | 1345 | } |
---|
[2cf3b87] | 1346 | |
---|
| 1347 | // monitor_guard_t __guard = { __monitors, # }; |
---|
[080d2d7] | 1348 | newBody->push_front( |
---|
[2cf3b87] | 1349 | new ast::DeclStmt( |
---|
| 1350 | location, |
---|
| 1351 | new ast::ObjectDecl( |
---|
| 1352 | location, |
---|
| 1353 | "__guard", |
---|
| 1354 | lock_guard_struct, |
---|
| 1355 | new ast::ListInit( |
---|
| 1356 | location, |
---|
| 1357 | { |
---|
| 1358 | new ast::SingleInit( |
---|
| 1359 | location, |
---|
| 1360 | new ast::VariableExpr( location, monitors ) ), |
---|
| 1361 | new ast::SingleInit( |
---|
| 1362 | location, |
---|
[d464b79] | 1363 | ast::ConstantExpr::from_ulong( location, flattenedArgs.size() ) ), |
---|
[2cf3b87] | 1364 | }, |
---|
| 1365 | {}, |
---|
| 1366 | ast::MaybeConstruct |
---|
[e8616b6] | 1367 | ) |
---|
[2cf3b87] | 1368 | ) |
---|
| 1369 | ) |
---|
| 1370 | ); |
---|
| 1371 | |
---|
| 1372 | // monitor$ * __monitors[] = { get_monitor(a), get_monitor(b) }; |
---|
[080d2d7] | 1373 | newBody->push_front( new ast::DeclStmt( location, monitors ) ); |
---|
| 1374 | |
---|
| 1375 | // // The parameter for both __lock_curr/__unlock_curr routines. |
---|
| 1376 | // ast::ObjectDecl * this_decl = new ast::ObjectDecl( |
---|
| 1377 | // location, |
---|
| 1378 | // "this", |
---|
| 1379 | // new ast::PointerType( new ast::VoidType() ), |
---|
| 1380 | // nullptr, |
---|
| 1381 | // {}, |
---|
| 1382 | // ast::Linkage::Cforall |
---|
| 1383 | // ); |
---|
| 1384 | |
---|
| 1385 | // ast::FunctionDecl * lock_decl = new ast::FunctionDecl( |
---|
| 1386 | // location, |
---|
| 1387 | // lockFnName, |
---|
| 1388 | // { /* forall */ }, |
---|
| 1389 | // { |
---|
| 1390 | // // Copy the declaration of this. |
---|
| 1391 | // this_decl, |
---|
| 1392 | // }, |
---|
| 1393 | // { /* returns */ }, |
---|
| 1394 | // nullptr, |
---|
| 1395 | // 0, |
---|
| 1396 | // ast::Linkage::Cforall, |
---|
| 1397 | // { /* attributes */ }, |
---|
| 1398 | // ast::Function::Inline |
---|
| 1399 | // ); |
---|
| 1400 | |
---|
| 1401 | // ast::FunctionDecl * unlock_decl = new ast::FunctionDecl( |
---|
| 1402 | // location, |
---|
| 1403 | // unlockFnName, |
---|
| 1404 | // { /* forall */ }, |
---|
| 1405 | // { |
---|
| 1406 | // // Copy the declaration of this. |
---|
| 1407 | // ast::deepCopy( this_decl ), |
---|
| 1408 | // }, |
---|
| 1409 | // { /* returns */ }, |
---|
| 1410 | // nullptr, |
---|
| 1411 | // 0, |
---|
| 1412 | // ast::Linkage::Cforall, |
---|
| 1413 | // { /* attributes */ }, |
---|
| 1414 | // ast::Function::Inline |
---|
| 1415 | // ); |
---|
| 1416 | |
---|
| 1417 | // ast::IfStmt * outerLockIf = nullptr; |
---|
| 1418 | // ast::IfStmt * outerUnlockIf = nullptr; |
---|
| 1419 | // ast::IfStmt * lastLockIf = nullptr; |
---|
| 1420 | // ast::IfStmt * lastUnlockIf = nullptr; |
---|
| 1421 | |
---|
| 1422 | // //adds an if/elif clause for each lock to assign type from void ptr based on ptr address |
---|
| 1423 | // for ( long unsigned int i = 0; i < args.size(); i++ ) { |
---|
| 1424 | // ast::VariableExpr * thisParam = new ast::VariableExpr( location, InitTweak::getParamThis( lock_decl ) ); |
---|
| 1425 | // ast::UntypedExpr * ifCond = new ast::UntypedExpr( location, |
---|
| 1426 | // new ast::NameExpr( location, "?==?" ), { |
---|
| 1427 | // thisParam, |
---|
| 1428 | // new ast::CastExpr( location, new ast::AddressExpr( location, args.at(i) ), new ast::PointerType( new ast::VoidType() )) |
---|
| 1429 | // } |
---|
| 1430 | // ); |
---|
| 1431 | |
---|
| 1432 | // ast::IfStmt * currLockIf = new ast::IfStmt( |
---|
| 1433 | // location, |
---|
| 1434 | // ast::deepCopy( ifCond ), |
---|
| 1435 | // genVirtLockUnlockExpr( "lock", args.at(i), location, ast::deepCopy( thisParam ) ) |
---|
| 1436 | // ); |
---|
| 1437 | |
---|
| 1438 | // ast::IfStmt * currUnlockIf = new ast::IfStmt( |
---|
| 1439 | // location, |
---|
| 1440 | // ifCond, |
---|
| 1441 | // genVirtLockUnlockExpr( "unlock", args.at(i), location, ast::deepCopy( thisParam ) ) |
---|
| 1442 | // ); |
---|
| 1443 | |
---|
| 1444 | // if ( i == 0 ) { |
---|
| 1445 | // outerLockIf = currLockIf; |
---|
| 1446 | // outerUnlockIf = currUnlockIf; |
---|
| 1447 | // } else { |
---|
| 1448 | // // add ifstmt to else of previous stmt |
---|
| 1449 | // lastLockIf->else_ = currLockIf; |
---|
| 1450 | // lastUnlockIf->else_ = currUnlockIf; |
---|
| 1451 | // } |
---|
| 1452 | |
---|
| 1453 | // lastLockIf = currLockIf; |
---|
| 1454 | // lastUnlockIf = currUnlockIf; |
---|
| 1455 | // } |
---|
| 1456 | |
---|
| 1457 | // // add pointer typing if/elifs to body of routines |
---|
| 1458 | // lock_decl->stmts = new ast::CompoundStmt( location, { outerLockIf } ); |
---|
| 1459 | // unlock_decl->stmts = new ast::CompoundStmt( location, { outerUnlockIf } ); |
---|
| 1460 | |
---|
| 1461 | // // add routines to scope |
---|
| 1462 | // declsToAddBefore.push_back( lock_decl ); |
---|
| 1463 | // declsToAddBefore.push_back( unlock_decl ); |
---|
| 1464 | |
---|
| 1465 | // newBody->push_front(new ast::DeclStmt( location, lock_decl )); |
---|
| 1466 | // newBody->push_front(new ast::DeclStmt( location, unlock_decl )); |
---|
| 1467 | |
---|
| 1468 | return newBody; |
---|
[2cf3b87] | 1469 | } |
---|
| 1470 | |
---|
| 1471 | ast::CompoundStmt * MutexKeyword::addThreadDtorStatements( |
---|
| 1472 | const ast::FunctionDecl*, const ast::CompoundStmt * body, |
---|
| 1473 | const std::vector<const ast::DeclWithType * > & args ) { |
---|
| 1474 | assert( args.size() == 1 ); |
---|
| 1475 | const ast::DeclWithType * arg = args.front(); |
---|
| 1476 | const ast::Type * argType = arg->get_type(); |
---|
| 1477 | assert( argType->is_mutex() ); |
---|
| 1478 | |
---|
| 1479 | ast::CompoundStmt * mutBody = ast::mutate( body ); |
---|
| 1480 | |
---|
| 1481 | // The code is generated near the front of the body. |
---|
| 1482 | const CodeLocation & location = mutBody->location; |
---|
| 1483 | |
---|
| 1484 | // thread_dtor_guard_t __guard = { this, intptr( 0 ) }; |
---|
| 1485 | mutBody->push_front( new ast::DeclStmt( |
---|
| 1486 | location, |
---|
| 1487 | new ast::ObjectDecl( |
---|
| 1488 | location, |
---|
| 1489 | "__guard", |
---|
| 1490 | new ast::StructInstType( thread_guard_decl ), |
---|
| 1491 | new ast::ListInit( |
---|
| 1492 | location, |
---|
| 1493 | { |
---|
| 1494 | new ast::SingleInit( location, |
---|
| 1495 | new ast::CastExpr( location, |
---|
| 1496 | new ast::VariableExpr( location, arg ), argType ) ), |
---|
| 1497 | new ast::SingleInit( |
---|
| 1498 | location, |
---|
| 1499 | new ast::UntypedExpr( |
---|
| 1500 | location, |
---|
| 1501 | new ast::NameExpr( location, "intptr" ), { |
---|
| 1502 | ast::ConstantExpr::from_int( location, 0 ), |
---|
| 1503 | } |
---|
| 1504 | ) ), |
---|
| 1505 | }, |
---|
| 1506 | {}, |
---|
| 1507 | ast::MaybeConstruct |
---|
[e8616b6] | 1508 | ) |
---|
[2cf3b87] | 1509 | ) |
---|
| 1510 | )); |
---|
| 1511 | |
---|
| 1512 | return mutBody; |
---|
| 1513 | } |
---|
| 1514 | |
---|
| 1515 | ast::ptr<ast::Type> MutexKeyword::generic_func = |
---|
| 1516 | new ast::FunctionType( ast::VariableArgs ); |
---|
| 1517 | |
---|
| 1518 | // -------------------------------------------------------------------------- |
---|
| 1519 | struct ThreadStarter final { |
---|
| 1520 | void previsit( const ast::StructDecl * decl ); |
---|
| 1521 | const ast::FunctionDecl * postvisit( const ast::FunctionDecl * decl ); |
---|
| 1522 | |
---|
| 1523 | private: |
---|
| 1524 | bool thread_ctor_seen = false; |
---|
| 1525 | const ast::StructDecl * thread_decl = nullptr; |
---|
| 1526 | }; |
---|
| 1527 | |
---|
| 1528 | void ThreadStarter::previsit( const ast::StructDecl * decl ) { |
---|
| 1529 | if ( decl->body && decl->name == "thread$" ) { |
---|
| 1530 | assert( !thread_decl ); |
---|
| 1531 | thread_decl = decl; |
---|
| 1532 | } |
---|
| 1533 | } |
---|
| 1534 | |
---|
| 1535 | const ast::FunctionDecl * ThreadStarter::postvisit( const ast::FunctionDecl * decl ) { |
---|
| 1536 | if ( !CodeGen::isConstructor( decl->name ) ) return decl; |
---|
| 1537 | |
---|
| 1538 | // Seach for the thread constructor. |
---|
| 1539 | // (Are the "prefixes" of these to blocks the same?) |
---|
| 1540 | const ast::Type * typeof_this = InitTweak::getTypeofThis( decl->type ); |
---|
| 1541 | auto ctored_type = dynamic_cast<const ast::StructInstType *>( typeof_this ); |
---|
| 1542 | if ( ctored_type && ctored_type->base == thread_decl ) { |
---|
| 1543 | thread_ctor_seen = true; |
---|
| 1544 | } |
---|
| 1545 | |
---|
| 1546 | // Modify this declaration, the extra checks to see if we will are first. |
---|
| 1547 | const ast::ptr<ast::DeclWithType> & param = decl->params.front(); |
---|
| 1548 | auto type = dynamic_cast<const ast::StructInstType *>( |
---|
[e01eb4a] | 1549 | ast::getPointerBase( param->get_type() ) ); |
---|
[2cf3b87] | 1550 | if ( nullptr == type ) return decl; |
---|
| 1551 | if ( !type->base->is_thread() ) return decl; |
---|
| 1552 | if ( !thread_decl || !thread_ctor_seen ) { |
---|
| 1553 | SemanticError( type->base->location, "thread keyword requires threads to be in scope, add #include <thread.hfa>" ); |
---|
| 1554 | } |
---|
| 1555 | const ast::CompoundStmt * stmt = decl->stmts; |
---|
| 1556 | if ( nullptr == stmt ) return decl; |
---|
| 1557 | |
---|
| 1558 | // Now do the actual modification: |
---|
| 1559 | ast::CompoundStmt * mutStmt = ast::mutate( stmt ); |
---|
| 1560 | const CodeLocation & location = mutStmt->location; |
---|
| 1561 | mutStmt->push_back( |
---|
| 1562 | new ast::ExprStmt( |
---|
| 1563 | location, |
---|
| 1564 | new ast::UntypedExpr( |
---|
| 1565 | location, |
---|
| 1566 | new ast::NameExpr( location, "__thrd_start" ), |
---|
| 1567 | { |
---|
| 1568 | new ast::VariableExpr( location, param ), |
---|
| 1569 | new ast::NameExpr( location, "main" ), |
---|
| 1570 | } |
---|
| 1571 | ) |
---|
| 1572 | ) |
---|
| 1573 | ); |
---|
| 1574 | |
---|
| 1575 | return ast::mutate_field( decl, &ast::FunctionDecl::stmts, mutStmt ); |
---|
| 1576 | } |
---|
| 1577 | |
---|
| 1578 | } // namespace |
---|
| 1579 | |
---|
| 1580 | // -------------------------------------------------------------------------- |
---|
[4f6dda0] | 1581 | // Interface Functions: |
---|
[2cf3b87] | 1582 | |
---|
| 1583 | void implementKeywords( ast::TranslationUnit & translationUnit ) { |
---|
[4f6dda0] | 1584 | ast::Pass<ThreadKeyword>::run( translationUnit ); |
---|
| 1585 | ast::Pass<CoroutineKeyword>::run( translationUnit ); |
---|
| 1586 | ast::Pass<MonitorKeyword>::run( translationUnit ); |
---|
| 1587 | ast::Pass<GeneratorKeyword>::run( translationUnit ); |
---|
| 1588 | ast::Pass<SuspendKeyword>::run( translationUnit ); |
---|
[2cf3b87] | 1589 | } |
---|
| 1590 | |
---|
| 1591 | void implementMutex( ast::TranslationUnit & translationUnit ) { |
---|
| 1592 | ast::Pass<MutexKeyword>::run( translationUnit ); |
---|
| 1593 | } |
---|
| 1594 | |
---|
| 1595 | void implementThreadStarter( ast::TranslationUnit & translationUnit ) { |
---|
| 1596 | ast::Pass<ThreadStarter>::run( translationUnit ); |
---|
| 1597 | } |
---|
| 1598 | |
---|
| 1599 | } |
---|
| 1600 | |
---|
| 1601 | // Local Variables: // |
---|
| 1602 | // tab-width: 4 // |
---|
| 1603 | // mode: c++ // |
---|
| 1604 | // compile-command: "make install" // |
---|
| 1605 | // End: // |
---|