path: root/CallGraph.cpp

/*
    This file is part of cpp-ethereum.

    cpp-ethereum is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    cpp-ethereum is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Christian <c@ethdev.com>
 * @date 2014
 * Callgraph of functions inside a contract.
 */

#include <libsolidity/AST.h>
#include <libsolidity/CallGraph.h>

using namespace std;

namespace dev
{
namespace solidity
{

void CallGraph::addNode(ASTNode const& _node)
{
    _node.accept(*this);
}

set<FunctionDefinition const*> const& CallGraph::getCalls()
{
    computeCallGraph();
    return m_functionsSeen;
}

void CallGraph::computeCallGraph()
{
    while (!m_workQueue.empty())
    {
        m_workQueue.front()->accept(*this);
        m_workQueue.pop();
    }
}

bool CallGraph::visit(Identifier const& _identifier)
{
    FunctionDefinition const* fun = dynamic_cast<FunctionDefinition const*>(_identifier.getReferencedDeclaration());
    if (fun)
    {
        if (m_overrideResolver)
            fun = (*m_overrideResolver)(fun->getName());
        solAssert(fun, "Error finding override for function " + fun->getName());
        addFunction(*fun);
    }
    return true;
}

bool CallGraph::visit(FunctionDefinition const& _function)
{
    addFunction(_function);
    return true;
}

bool CallGraph::visit(MemberAccess const& _memberAccess)
{
    // used for "BaseContract.baseContractFunction"
    if (_memberAccess.getExpression().getType()->getCategory() == Type::Category::TYPE)
    {
        TypeType const& type = dynamic_cast<TypeType const&>(*_memberAccess.getExpression().getType());
        if (type.getMembers().getMemberType(_memberAccess.getMemberName()))
        {
            ContractDefinition const& contract = dynamic_cast<ContractType const&>(*type.getActualType())
                                                    .getContractDefinition();
            for (ASTPointer<FunctionDefinition> const& function: contract.getDefinedFunctions())
                if (function->getName() == _memberAccess.getMemberName())
                {
                    addFunction(*function);
                    return true;
                }
        }
    }
    return true;
}

void CallGraph::addFunction(FunctionDefinition const& _function)
{
    if (!m_functionsSeen.count(&_function))
    {
        m_functionsSeen.insert(&_function);
        m_workQueue.push(&_function);
    }
}

}
}