mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
134 lines
4.6 KiB
C++
134 lines
4.6 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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// SPDX-License-Identifier: GPL-3.0
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/**
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* Analysis part of inline assembly.
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*/
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#pragma once
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#include <liblangutil/Exceptions.h>
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#include <liblangutil/EVMVersion.h>
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#include <libyul/Dialect.h>
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#include <libyul/AsmScope.h>
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#include <libyul/ASTForward.h>
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#include <libyul/backends/evm/AbstractAssembly.h>
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#include <libyul/backends/evm/EVMDialect.h>
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#include <functional>
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#include <list>
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#include <memory>
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#include <optional>
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#include <utility>
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namespace solidity::langutil
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{
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class ErrorReporter;
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struct SourceLocation;
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}
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namespace solidity::yul
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{
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struct AsmAnalysisInfo;
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/**
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* Performs the full analysis stage, calls the ScopeFiller internally, then resolves
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* references and performs other checks.
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* If all these checks pass, code generation should not throw errors.
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*/
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class AsmAnalyzer
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{
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public:
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explicit AsmAnalyzer(
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AsmAnalysisInfo& _analysisInfo,
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langutil::ErrorReporter& _errorReporter,
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Dialect const& _dialect,
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ExternalIdentifierAccess::Resolver _resolver = ExternalIdentifierAccess::Resolver(),
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std::set<YulString> _dataNames = {}
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):
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m_resolver(std::move(_resolver)),
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m_info(_analysisInfo),
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m_errorReporter(_errorReporter),
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m_dialect(_dialect),
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m_dataNames(std::move(_dataNames))
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{
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if (EVMDialect const* evmDialect = dynamic_cast<EVMDialect const*>(&m_dialect))
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m_evmVersion = evmDialect->evmVersion();
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}
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bool analyze(Block const& _block);
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/// Performs analysis on the outermost code of the given object and returns the analysis info.
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/// Asserts on failure.
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static AsmAnalysisInfo analyzeStrictAssertCorrect(Dialect const& _dialect, Object const& _object);
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std::vector<YulString> operator()(Literal const& _literal);
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std::vector<YulString> operator()(Identifier const&);
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void operator()(ExpressionStatement const&);
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void operator()(Assignment const& _assignment);
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void operator()(VariableDeclaration const& _variableDeclaration);
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void operator()(FunctionDefinition const& _functionDefinition);
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std::vector<YulString> operator()(FunctionCall const& _functionCall);
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void operator()(If const& _if);
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void operator()(Switch const& _switch);
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void operator()(ForLoop const& _forLoop);
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void operator()(Break const&) { }
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void operator()(Continue const&) { }
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void operator()(Leave const&) { }
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void operator()(Block const& _block);
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private:
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/// Visits the expression, expects that it evaluates to exactly one value and
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/// returns the type. Reports errors on errors and returns the default type.
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YulString expectExpression(Expression const& _expr);
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YulString expectUnlimitedStringLiteral(Literal const& _literal);
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/// Vists the expression and expects it to return a single boolean value.
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/// Reports an error otherwise.
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void expectBoolExpression(Expression const& _expr);
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/// Verifies that a variable to be assigned to exists, can be assigned to
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/// and has the same type as the value.
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void checkAssignment(Identifier const& _variable, YulString _valueType);
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Scope& scope(Block const* _block);
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void expectValidIdentifier(YulString _identifier, langutil::SourceLocation const& _location);
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void expectValidType(YulString _type, langutil::SourceLocation const& _location);
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void expectType(YulString _expectedType, YulString _givenType, langutil::SourceLocation const& _location);
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bool validateInstructions(evmasm::Instruction _instr, langutil::SourceLocation const& _location);
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bool validateInstructions(std::string const& _instrIdentifier, langutil::SourceLocation const& _location);
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bool validateInstructions(FunctionCall const& _functionCall);
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yul::ExternalIdentifierAccess::Resolver m_resolver;
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Scope* m_currentScope = nullptr;
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/// Variables that are active at the current point in assembly (as opposed to
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/// "part of the scope but not yet declared")
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std::set<Scope::Variable const*> m_activeVariables;
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AsmAnalysisInfo& m_info;
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langutil::ErrorReporter& m_errorReporter;
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langutil::EVMVersion m_evmVersion;
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Dialect const& m_dialect;
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/// Names of data objects to be referenced by builtin functions with literal arguments.
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std::set<YulString> m_dataNames;
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ForLoop const* m_currentForLoop = nullptr;
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};
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}
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