182 lines
7.2 KiB
Go
182 lines
7.2 KiB
Go
// Copyright 2017 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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//
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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package vm
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import (
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"bytes"
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"math"
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"math/big"
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"sort"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/params"
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"github.com/holiman/uint256"
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)
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func TestMemoryGasCost(t *testing.T) {
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tests := []struct {
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size uint64
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cost uint64
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overflow bool
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}{
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{0x1fffffffe0, 36028809887088637, false},
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{0x1fffffffe1, 0, true},
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}
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for i, tt := range tests {
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v, err := memoryGasCost(&Memory{}, tt.size)
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if (err == ErrGasUintOverflow) != tt.overflow {
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t.Errorf("test %d: overflow mismatch: have %v, want %v", i, err == ErrGasUintOverflow, tt.overflow)
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}
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if v != tt.cost {
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t.Errorf("test %d: gas cost mismatch: have %v, want %v", i, v, tt.cost)
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}
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}
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}
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var eip2200Tests = []struct {
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original byte
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gaspool uint64
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input string
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used uint64
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refund uint64
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failure error
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}{
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{0, math.MaxUint64, "0x60006000556000600055", 1612, 0, nil}, // 0 -> 0 -> 0
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{0, math.MaxUint64, "0x60006000556001600055", 20812, 0, nil}, // 0 -> 0 -> 1
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{0, math.MaxUint64, "0x60016000556000600055", 20812, 19200, nil}, // 0 -> 1 -> 0
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{0, math.MaxUint64, "0x60016000556002600055", 20812, 0, nil}, // 0 -> 1 -> 2
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{0, math.MaxUint64, "0x60016000556001600055", 20812, 0, nil}, // 0 -> 1 -> 1
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{1, math.MaxUint64, "0x60006000556000600055", 5812, 15000, nil}, // 1 -> 0 -> 0
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{1, math.MaxUint64, "0x60006000556001600055", 5812, 4200, nil}, // 1 -> 0 -> 1
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{1, math.MaxUint64, "0x60006000556002600055", 5812, 0, nil}, // 1 -> 0 -> 2
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{1, math.MaxUint64, "0x60026000556000600055", 5812, 15000, nil}, // 1 -> 2 -> 0
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{1, math.MaxUint64, "0x60026000556003600055", 5812, 0, nil}, // 1 -> 2 -> 3
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{1, math.MaxUint64, "0x60026000556001600055", 5812, 4200, nil}, // 1 -> 2 -> 1
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{1, math.MaxUint64, "0x60026000556002600055", 5812, 0, nil}, // 1 -> 2 -> 2
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{1, math.MaxUint64, "0x60016000556000600055", 5812, 15000, nil}, // 1 -> 1 -> 0
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{1, math.MaxUint64, "0x60016000556002600055", 5812, 0, nil}, // 1 -> 1 -> 2
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{1, math.MaxUint64, "0x60016000556001600055", 1612, 0, nil}, // 1 -> 1 -> 1
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{0, math.MaxUint64, "0x600160005560006000556001600055", 40818, 19200, nil}, // 0 -> 1 -> 0 -> 1
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{1, math.MaxUint64, "0x600060005560016000556000600055", 10818, 19200, nil}, // 1 -> 0 -> 1 -> 0
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{1, 2306, "0x6001600055", 2306, 0, ErrOutOfGas}, // 1 -> 1 (2300 sentry + 2xPUSH)
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{1, 2307, "0x6001600055", 806, 0, nil}, // 1 -> 1 (2301 sentry + 2xPUSH)
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}
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func TestEIP2200(t *testing.T) {
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for i, tt := range eip2200Tests {
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address := common.BytesToAddress([]byte("contract"))
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statedb, _ := state.New(types.EmptyRootHash, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
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statedb.CreateAccount(address)
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statedb.SetCode(address, hexutil.MustDecode(tt.input))
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statedb.SetState(address, common.Hash{}, common.BytesToHash([]byte{tt.original}))
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statedb.Finalise(true) // Push the state into the "original" slot
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vmctx := BlockContext{
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CanTransfer: func(StateDB, common.Address, *uint256.Int) bool { return true },
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Transfer: func(StateDB, common.Address, common.Address, *uint256.Int) {},
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}
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vmenv := NewEVM(vmctx, TxContext{}, statedb, params.AllEthashProtocolChanges, Config{ExtraEips: []int{2200}})
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_, gas, err := vmenv.Call(AccountRef(common.Address{}), address, nil, tt.gaspool, new(uint256.Int))
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if err != tt.failure {
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t.Errorf("test %d: failure mismatch: have %v, want %v", i, err, tt.failure)
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}
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if used := tt.gaspool - gas; used != tt.used {
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t.Errorf("test %d: gas used mismatch: have %v, want %v", i, used, tt.used)
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}
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if refund := vmenv.StateDB.GetRefund(); refund != tt.refund {
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t.Errorf("test %d: gas refund mismatch: have %v, want %v", i, refund, tt.refund)
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}
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}
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}
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var createGasTests = []struct {
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code string
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eip3860 bool
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gasUsed uint64
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minimumGas uint64
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}{
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// legacy create(0, 0, 0xc000) without 3860 used
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{"0x61C00060006000f0" + "600052" + "60206000F3", false, 41237, 41237},
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// legacy create(0, 0, 0xc000) _with_ 3860
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{"0x61C00060006000f0" + "600052" + "60206000F3", true, 44309, 44309},
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// create2(0, 0, 0xc001, 0) without 3860
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{"0x600061C00160006000f5" + "600052" + "60206000F3", false, 50471, 50471},
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// create2(0, 0, 0xc001, 0) (too large), with 3860
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{"0x600061C00160006000f5" + "600052" + "60206000F3", true, 32012, 100_000},
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// create2(0, 0, 0xc000, 0)
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// This case is trying to deploy code at (within) the limit
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{"0x600061C00060006000f5" + "600052" + "60206000F3", true, 53528, 53528},
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// create2(0, 0, 0xc001, 0)
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// This case is trying to deploy code exceeding the limit
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{"0x600061C00160006000f5" + "600052" + "60206000F3", true, 32024, 100000},
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}
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func TestCreateGas(t *testing.T) {
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for i, tt := range createGasTests {
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var gasUsed = uint64(0)
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doCheck := func(testGas int) bool {
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address := common.BytesToAddress([]byte("contract"))
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statedb, _ := state.New(types.EmptyRootHash, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
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statedb.CreateAccount(address)
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statedb.SetCode(address, hexutil.MustDecode(tt.code))
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statedb.Finalise(true)
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vmctx := BlockContext{
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CanTransfer: func(StateDB, common.Address, *uint256.Int) bool { return true },
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Transfer: func(StateDB, common.Address, common.Address, *uint256.Int) {},
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BlockNumber: big.NewInt(0),
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}
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config := Config{}
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if tt.eip3860 {
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config.ExtraEips = []int{3860}
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}
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vmenv := NewEVM(vmctx, TxContext{}, statedb, params.AllEthashProtocolChanges, config)
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var startGas = uint64(testGas)
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ret, gas, err := vmenv.Call(AccountRef(common.Address{}), address, nil, startGas, new(uint256.Int))
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if err != nil {
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return false
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}
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gasUsed = startGas - gas
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if len(ret) != 32 {
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t.Fatalf("test %d: expected 32 bytes returned, have %d", i, len(ret))
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}
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if bytes.Equal(ret, make([]byte, 32)) {
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// Failure
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return false
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}
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return true
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}
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minGas := sort.Search(100_000, doCheck)
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if uint64(minGas) != tt.minimumGas {
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t.Fatalf("test %d: min gas error, want %d, have %d", i, tt.minimumGas, minGas)
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}
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// If the deployment succeeded, we also check the gas used
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if minGas < 100_000 {
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if gasUsed != tt.gasUsed {
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t.Errorf("test %d: gas used mismatch: have %v, want %v", i, gasUsed, tt.gasUsed)
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}
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}
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}
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}
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