mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
104 lines
3.1 KiB
C++
104 lines
3.1 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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#include <libsolidity/formal/VariableUsage.h>
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#include <libsolidity/formal/SMTChecker.h>
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#include <algorithm>
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using namespace std;
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using namespace dev;
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using namespace dev::solidity;
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set<VariableDeclaration const*> VariableUsage::touchedVariables(ASTNode const& _node, vector<CallableDeclaration const*> const& _outerCallstack)
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{
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m_touchedVariables.clear();
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m_callStack.clear();
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m_callStack += _outerCallstack;
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m_lastCall = m_callStack.back();
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_node.accept(*this);
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return m_touchedVariables;
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}
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void VariableUsage::endVisit(Identifier const& _identifier)
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{
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if (_identifier.annotation().lValueRequested)
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checkIdentifier(_identifier);
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}
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void VariableUsage::endVisit(IndexAccess const& _indexAccess)
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{
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if (_indexAccess.annotation().lValueRequested)
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{
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/// identifier.annotation().lValueRequested == false, that's why we
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/// need to check that before.
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auto identifier = dynamic_cast<Identifier const*>(SMTChecker::leftmostBase(_indexAccess));
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if (identifier)
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checkIdentifier(*identifier);
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}
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}
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void VariableUsage::endVisit(FunctionCall const& _funCall)
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{
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if (auto const& funDef = SMTChecker::inlinedFunctionCallToDefinition(_funCall))
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if (find(m_callStack.begin(), m_callStack.end(), funDef) == m_callStack.end())
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funDef->accept(*this);
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}
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bool VariableUsage::visit(FunctionDefinition const& _function)
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{
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m_callStack.push_back(&_function);
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return true;
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}
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void VariableUsage::endVisit(FunctionDefinition const&)
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{
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solAssert(!m_callStack.empty(), "");
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m_callStack.pop_back();
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}
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void VariableUsage::endVisit(ModifierInvocation const& _modifierInv)
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{
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auto const& modifierDef = dynamic_cast<ModifierDefinition const*>(_modifierInv.name()->annotation().referencedDeclaration);
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if (modifierDef)
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modifierDef->accept(*this);
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}
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void VariableUsage::endVisit(PlaceholderStatement const&)
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{
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solAssert(!m_callStack.empty(), "");
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FunctionDefinition const* funDef = nullptr;
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for (auto it = m_callStack.rbegin(); it != m_callStack.rend() && !funDef; ++it)
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funDef = dynamic_cast<FunctionDefinition const*>(*it);
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solAssert(funDef, "");
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if (funDef->isImplemented())
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funDef->body().accept(*this);
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}
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void VariableUsage::checkIdentifier(Identifier const& _identifier)
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{
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Declaration const* declaration = _identifier.annotation().referencedDeclaration;
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solAssert(declaration, "");
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if (VariableDeclaration const* varDecl = dynamic_cast<VariableDeclaration const*>(declaration))
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{
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solAssert(m_lastCall, "");
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if (!varDecl->isLocalVariable() || varDecl->functionOrModifierDefinition() == m_lastCall)
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m_touchedVariables.insert(varDecl);
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}
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}
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