You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
2.6 KiB
105 lines
2.6 KiB
10 years ago
|
/*
|
||
|
|
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/>.
|
||
|
|
*/
|
||
|
|
/** @file GasMeter.cpp
|
||
|
|
* @author Christian <c@ethdev.com>
|
||
|
|
* @date 2015
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "GasMeter.h"
|
||
|
|
#include <libevmcore/Params.h>
|
||
|
|
|
||
|
|
using namespace std;
|
||
|
|
using namespace dev;
|
||
|
|
using namespace dev::eth;
|
||
|
|
|
||
|
|
GasMeter::GasConsumption& GasMeter::GasConsumption::operator+=(GasConsumption const& _other)
|
||
|
|
{
|
||
|
|
isInfinite = isInfinite || _other.isInfinite;
|
||
|
|
if (isInfinite)
|
||
|
|
return *this;
|
||
|
|
bigint v = bigint(value) + _other.value;
|
||
|
|
if (v > std::numeric_limits<u256>::max())
|
||
|
|
isInfinite = true;
|
||
|
|
else
|
||
|
|
value = u256(v);
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
GasMeter::GasConsumption GasMeter::estimateMax(AssemblyItem const& _item)
|
||
|
|
{
|
||
|
|
switch (_item.type()) {
|
||
|
|
case Push:
|
||
|
|
case PushTag:
|
||
|
|
return runGas(Instruction::PUSH1);
|
||
|
|
case Tag:
|
||
|
|
return runGas(Instruction::JUMPDEST);
|
||
|
|
case Operation:
|
||
|
|
{
|
||
|
|
GasConsumption gas = runGas(_item.instruction());
|
||
|
|
switch (_item.instruction())
|
||
|
|
{
|
||
|
|
case Instruction::SSTORE:
|
||
|
|
// @todo logic can be improved
|
||
|
|
gas += c_sstoreSetGas;
|
||
|
|
break;
|
||
|
|
case Instruction::SLOAD:
|
||
|
|
gas += c_sloadGas;
|
||
|
|
break;
|
||
|
|
case Instruction::MSTORE:
|
||
|
|
case Instruction::MSTORE8:
|
||
|
|
case Instruction::MLOAD:
|
||
|
|
case Instruction::RETURN:
|
||
|
|
case Instruction::SHA3:
|
||
|
|
case Instruction::CALLDATACOPY:
|
||
|
|
case Instruction::CODECOPY:
|
||
|
|
case Instruction::EXTCODECOPY:
|
||
|
|
case Instruction::LOG0:
|
||
|
|
case Instruction::LOG1:
|
||
|
|
case Instruction::LOG2:
|
||
|
|
case Instruction::LOG3:
|
||
|
|
case Instruction::LOG4:
|
||
|
|
case Instruction::CALL:
|
||
|
|
case Instruction::CALLCODE:
|
||
|
|
case Instruction::CREATE:
|
||
|
|
case Instruction::EXP:
|
||
|
|
// @todo logic can be improved
|
||
|
|
gas = GasConsumption::infinite();
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return gas;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return GasConsumption::infinite();
|
||
|
|
}
|
||
|
|
|
||
|
|
GasMeter::GasConsumption GasMeter::runGas(Instruction _instruction)
|
||
|
|
{
|
||
|
|
if (_instruction == Instruction::JUMPDEST)
|
||
|
|
return GasConsumption(1);
|
||
|
|
|
||
|
|
int tier = instructionInfo(_instruction).gasPriceTier;
|
||
|
|
return tier == InvalidTier ? GasConsumption::infinite() : c_tierStepGas[tier];
|
||
|
|
}
|
||
|
|
|
||
|
|
|