mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity 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.
|
|
|
|
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**
|
|
* @author Christian <c@ethdev.com>
|
|
* @date 2015
|
|
* Gas consumption estimator working alongside the AST.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <libsolidity/interface/EVMVersion.h>
|
|
|
|
#include <libevmasm/GasMeter.h>
|
|
#include <libevmasm/Assembly.h>
|
|
|
|
#include <vector>
|
|
#include <map>
|
|
#include <array>
|
|
|
|
namespace dev
|
|
{
|
|
namespace solidity
|
|
{
|
|
|
|
class ASTNode;
|
|
class FunctionDefinition;
|
|
|
|
struct GasEstimator
|
|
{
|
|
public:
|
|
using GasConsumption = eth::GasMeter::GasConsumption;
|
|
using ASTGasConsumption = std::map<ASTNode const*, GasConsumption>;
|
|
using ASTGasConsumptionSelfAccumulated =
|
|
std::map<ASTNode const*, std::array<GasConsumption, 2>>;
|
|
|
|
explicit GasEstimator(EVMVersion _evmVersion): m_evmVersion(_evmVersion) {}
|
|
|
|
/// Estimates the gas consumption for every assembly item in the given assembly and stores
|
|
/// it by source location.
|
|
/// @returns a mapping from each AST node to a pair of its particular and syntactically accumulated gas costs.
|
|
ASTGasConsumptionSelfAccumulated structuralEstimation(
|
|
eth::AssemblyItems const& _items,
|
|
std::vector<ASTNode const*> const& _ast
|
|
) const;
|
|
/// @returns a mapping from nodes with non-overlapping source locations to gas consumptions such that
|
|
/// the following source locations are part of the mapping:
|
|
/// 1. source locations of statements that do not contain other statements
|
|
/// 2. maximal source locations that do not overlap locations coming from the first rule
|
|
static ASTGasConsumption breakToStatementLevel(
|
|
ASTGasConsumptionSelfAccumulated const& _gasCosts,
|
|
std::vector<ASTNode const*> const& _roots
|
|
);
|
|
|
|
/// @returns the estimated gas consumption by the (public or external) function with the
|
|
/// given signature. If no signature is given, estimates the maximum gas usage.
|
|
GasConsumption functionalEstimation(
|
|
eth::AssemblyItems const& _items,
|
|
std::string const& _signature = ""
|
|
) const;
|
|
|
|
/// @returns the estimated gas consumption by the given function which starts at the given
|
|
/// offset into the list of assembly items.
|
|
/// @note this does not work correctly for recursive functions.
|
|
GasConsumption functionalEstimation(
|
|
eth::AssemblyItems const& _items,
|
|
size_t const& _offset,
|
|
FunctionDefinition const& _function
|
|
) const;
|
|
|
|
private:
|
|
/// @returns the set of AST nodes which are the finest nodes at their location.
|
|
static std::set<ASTNode const*> finestNodesAtLocation(std::vector<ASTNode const*> const& _roots);
|
|
EVMVersion m_evmVersion;
|
|
};
|
|
|
|
}
|
|
}
|