plugeth/core/vm/gas_table_test.go

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2017-04-14 08:29:00 +00:00
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package vm
import (
"math"
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/params"
)
func TestMemoryGasCost(t *testing.T) {
tests := []struct {
size uint64
cost uint64
overflow bool
}{
{0x1fffffffe0, 36028809887088637, false},
{0x1fffffffe1, 0, true},
}
for i, tt := range tests {
v, err := memoryGasCost(&Memory{}, tt.size)
if (err == ErrGasUintOverflow) != tt.overflow {
t.Errorf("test %d: overflow mismatch: have %v, want %v", i, err == ErrGasUintOverflow, tt.overflow)
}
if v != tt.cost {
t.Errorf("test %d: gas cost mismatch: have %v, want %v", i, v, tt.cost)
}
}
}
var eip2200Tests = []struct {
original byte
gaspool uint64
input string
used uint64
refund uint64
failure error
}{
{0, math.MaxUint64, "0x60006000556000600055", 1612, 0, nil}, // 0 -> 0 -> 0
{0, math.MaxUint64, "0x60006000556001600055", 20812, 0, nil}, // 0 -> 0 -> 1
{0, math.MaxUint64, "0x60016000556000600055", 20812, 19200, nil}, // 0 -> 1 -> 0
{0, math.MaxUint64, "0x60016000556002600055", 20812, 0, nil}, // 0 -> 1 -> 2
{0, math.MaxUint64, "0x60016000556001600055", 20812, 0, nil}, // 0 -> 1 -> 1
{1, math.MaxUint64, "0x60006000556000600055", 5812, 15000, nil}, // 1 -> 0 -> 0
{1, math.MaxUint64, "0x60006000556001600055", 5812, 4200, nil}, // 1 -> 0 -> 1
{1, math.MaxUint64, "0x60006000556002600055", 5812, 0, nil}, // 1 -> 0 -> 2
{1, math.MaxUint64, "0x60026000556000600055", 5812, 15000, nil}, // 1 -> 2 -> 0
{1, math.MaxUint64, "0x60026000556003600055", 5812, 0, nil}, // 1 -> 2 -> 3
{1, math.MaxUint64, "0x60026000556001600055", 5812, 4200, nil}, // 1 -> 2 -> 1
{1, math.MaxUint64, "0x60026000556002600055", 5812, 0, nil}, // 1 -> 2 -> 2
{1, math.MaxUint64, "0x60016000556000600055", 5812, 15000, nil}, // 1 -> 1 -> 0
{1, math.MaxUint64, "0x60016000556002600055", 5812, 0, nil}, // 1 -> 1 -> 2
{1, math.MaxUint64, "0x60016000556001600055", 1612, 0, nil}, // 1 -> 1 -> 1
{0, math.MaxUint64, "0x600160005560006000556001600055", 40818, 19200, nil}, // 0 -> 1 -> 0 -> 1
{1, math.MaxUint64, "0x600060005560016000556000600055", 10818, 19200, nil}, // 1 -> 0 -> 1 -> 0
{1, 2306, "0x6001600055", 2306, 0, ErrOutOfGas}, // 1 -> 1 (2300 sentry + 2xPUSH)
{1, 2307, "0x6001600055", 806, 0, nil}, // 1 -> 1 (2301 sentry + 2xPUSH)
}
func TestEIP2200(t *testing.T) {
for i, tt := range eip2200Tests {
address := common.BytesToAddress([]byte("contract"))
statedb, _ := state.New(common.Hash{}, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
statedb.CreateAccount(address)
statedb.SetCode(address, hexutil.MustDecode(tt.input))
statedb.SetState(address, common.Hash{}, common.BytesToHash([]byte{tt.original}))
statedb.Finalise(true) // Push the state into the "original" slot
vmctx := BlockContext{
CanTransfer: func(StateDB, common.Address, *big.Int) bool { return true },
Transfer: func(StateDB, common.Address, common.Address, *big.Int) {},
}
vmenv := NewEVM(vmctx, TxContext{}, statedb, params.AllEthashProtocolChanges, Config{ExtraEips: []int{2200}})
_, gas, err := vmenv.Call(AccountRef(common.Address{}), address, nil, tt.gaspool, new(big.Int))
if err != tt.failure {
t.Errorf("test %d: failure mismatch: have %v, want %v", i, err, tt.failure)
}
if used := tt.gaspool - gas; used != tt.used {
t.Errorf("test %d: gas used mismatch: have %v, want %v", i, used, tt.used)
}
if refund := vmenv.StateDB.GetRefund(); refund != tt.refund {
t.Errorf("test %d: gas refund mismatch: have %v, want %v", i, refund, tt.refund)
}
}
}