mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
57 lines
2.1 KiB
C++
57 lines
2.1 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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#pragma once
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#include <libsolidity/analysis/ControlFlowGraph.h>
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#include <liblangutil/ErrorReporter.h>
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#include <set>
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namespace solidity::frontend
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{
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class ControlFlowAnalyzer
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{
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public:
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explicit ControlFlowAnalyzer(CFG const& _cfg, langutil::ErrorReporter& _errorReporter):
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m_cfg(_cfg), m_errorReporter(_errorReporter) {}
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bool run();
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private:
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void analyze(FunctionDefinition const& _function, ContractDefinition const* _contract, FunctionFlow const& _flow);
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/// Checks for uninitialized variable accesses in the control flow between @param _entry and @param _exit.
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/// @param _entry entry node
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/// @param _exit exit node
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/// @param _emptyBody whether the body of the function is empty (true) or not (false)
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/// @param _contractName name of the most derived contract, should be empty
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/// if the function is also defined in it
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void checkUninitializedAccess(CFGNode const* _entry, CFGNode const* _exit, bool _emptyBody, std::optional<std::string> _contractName = {});
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/// Checks for unreachable code, i.e. code ending in @param _exit, @param _revert or @param _transactionReturn
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/// that can not be reached from @param _entry.
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void checkUnreachable(CFGNode const* _entry, CFGNode const* _exit, CFGNode const* _revert, CFGNode const* _transactionReturn);
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CFG const& m_cfg;
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langutil::ErrorReporter& m_errorReporter;
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std::set<langutil::SourceLocation> m_unreachableLocationsAlreadyWarnedFor;
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std::set<VariableDeclaration const*> m_unassignedReturnVarsAlreadyWarnedFor;
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};
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}
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