mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
115 lines
4.4 KiB
C++
115 lines
4.4 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <libsolidity/ast/ASTVisitor.h>
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#include <libsolidity/formal/SolverInterface.h>
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#include <libsolidity/interface/ReadFile.h>
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#include <map>
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#include <string>
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namespace dev
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{
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namespace solidity
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{
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class ErrorReporter;
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class SMTChecker: private ASTConstVisitor
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{
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public:
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SMTChecker(ErrorReporter& _errorReporter, ReadCallback::Callback const& _readCallback);
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void analyze(SourceUnit const& _sources);
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private:
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// TODO: Check that we do not have concurrent reads and writes to a variable,
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// because the order of expression evaluation is undefined
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// TODO: or just force a certain order, but people might have a different idea about that.
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virtual void endVisit(VariableDeclaration const& _node) override;
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virtual bool visit(FunctionDefinition const& _node) override;
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virtual void endVisit(FunctionDefinition const& _node) override;
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virtual bool visit(IfStatement const& _node) override;
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virtual bool visit(WhileStatement const& _node) override;
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virtual void endVisit(VariableDeclarationStatement const& _node) override;
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virtual void endVisit(ExpressionStatement const& _node) override;
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virtual void endVisit(Assignment const& _node) override;
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virtual void endVisit(TupleExpression const& _node) override;
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virtual void endVisit(BinaryOperation const& _node) override;
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virtual void endVisit(FunctionCall const& _node) override;
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virtual void endVisit(Identifier const& _node) override;
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virtual void endVisit(Literal const& _node) override;
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void arithmeticOperation(BinaryOperation const& _op);
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void compareOperation(BinaryOperation const& _op);
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void booleanOperation(BinaryOperation const& _op);
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void checkCondition(
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smt::Expression _condition,
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SourceLocation const& _location,
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std::string const& _description,
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std::string const& _additionalValueName = "",
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smt::Expression* _additionalValue = nullptr
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);
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void createVariable(VariableDeclaration const& _varDecl, bool _setToZero);
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static std::string uniqueSymbol(Declaration const& _decl);
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static std::string uniqueSymbol(Expression const& _expr);
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/// @returns true if _delc is a variable that is known at the current point, i.e.
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/// has a valid sequence number
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bool knownVariable(Declaration const& _decl);
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/// @returns an expression denoting the value of the variable declared in @a _decl
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/// at the current point.
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smt::Expression currentValue(Declaration const& _decl);
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/// @returns an expression denoting the value of the variable declared in @a _decl
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/// at the given sequence point. Does not ensure that this sequence point exists.
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smt::Expression valueAtSequence(Declaration const& _decl, int _sequence);
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/// Allocates a new sequence number for the declaration, updates the current
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/// sequence number to this value and returns the expression.
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smt::Expression newValue(Declaration const& _decl);
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/// Sets the value of the declaration either to zero or to its intrinsic range.
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void setValue(Declaration const& _decl, bool _setToZero);
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static smt::Expression minValue(IntegerType const& _t);
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static smt::Expression maxValue(IntegerType const& _t);
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/// Returns the expression corresponding to the AST node. Creates a new expression
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/// if it does not exist yet.
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smt::Expression expr(Expression const& _e);
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/// Returns the function declaration corresponding to the given variable.
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/// The function takes one argument which is the "sequence number".
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smt::Expression var(Declaration const& _decl);
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std::shared_ptr<smt::SolverInterface> m_interface;
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std::map<Declaration const*, int> m_currentSequenceCounter;
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std::map<Declaration const*, int> m_nextFreeSequenceCounter;
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std::map<Expression const*, smt::Expression> m_expressions;
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std::map<Declaration const*, smt::Expression> m_variables;
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ErrorReporter& m_errorReporter;
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FunctionDefinition const* m_currentFunction = nullptr;
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};
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}
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}
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