// 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 . package vm import ( "bytes" "errors" "math" "math/big" "sort" "testing" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" "github.com/ethereum/go-ethereum/core/state" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/params" "github.com/holiman/uint256" ) 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(types.EmptyRootHash, state.NewDatabaseForTesting()) 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, *uint256.Int) bool { return true }, Transfer: func(StateDB, common.Address, common.Address, *uint256.Int) {}, } vmenv := NewEVM(vmctx, TxContext{}, statedb, params.AllEthashProtocolChanges, Config{ExtraEips: []int{2200}}) _, gas, err := vmenv.Call(AccountRef(common.Address{}), address, nil, tt.gaspool, new(uint256.Int)) if !errors.Is(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) } } } var createGasTests = []struct { code string eip3860 bool gasUsed uint64 minimumGas uint64 }{ // legacy create(0, 0, 0xc000) without 3860 used {"0x61C00060006000f0" + "600052" + "60206000F3", false, 41237, 41237}, // legacy create(0, 0, 0xc000) _with_ 3860 {"0x61C00060006000f0" + "600052" + "60206000F3", true, 44309, 44309}, // create2(0, 0, 0xc001, 0) without 3860 {"0x600061C00160006000f5" + "600052" + "60206000F3", false, 50471, 50471}, // create2(0, 0, 0xc001, 0) (too large), with 3860 {"0x600061C00160006000f5" + "600052" + "60206000F3", true, 32012, 100_000}, // create2(0, 0, 0xc000, 0) // This case is trying to deploy code at (within) the limit {"0x600061C00060006000f5" + "600052" + "60206000F3", true, 53528, 53528}, // create2(0, 0, 0xc001, 0) // This case is trying to deploy code exceeding the limit {"0x600061C00160006000f5" + "600052" + "60206000F3", true, 32024, 100000}, } func TestCreateGas(t *testing.T) { for i, tt := range createGasTests { var gasUsed = uint64(0) doCheck := func(testGas int) bool { address := common.BytesToAddress([]byte("contract")) statedb, _ := state.New(types.EmptyRootHash, state.NewDatabaseForTesting()) statedb.CreateAccount(address) statedb.SetCode(address, hexutil.MustDecode(tt.code)) statedb.Finalise(true) vmctx := BlockContext{ CanTransfer: func(StateDB, common.Address, *uint256.Int) bool { return true }, Transfer: func(StateDB, common.Address, common.Address, *uint256.Int) {}, BlockNumber: big.NewInt(0), } config := Config{} if tt.eip3860 { config.ExtraEips = []int{3860} } vmenv := NewEVM(vmctx, TxContext{}, statedb, params.AllEthashProtocolChanges, config) var startGas = uint64(testGas) ret, gas, err := vmenv.Call(AccountRef(common.Address{}), address, nil, startGas, new(uint256.Int)) if err != nil { return false } gasUsed = startGas - gas if len(ret) != 32 { t.Fatalf("test %d: expected 32 bytes returned, have %d", i, len(ret)) } if bytes.Equal(ret, make([]byte, 32)) { // Failure return false } return true } minGas := sort.Search(100_000, doCheck) if uint64(minGas) != tt.minimumGas { t.Fatalf("test %d: min gas error, want %d, have %d", i, tt.minimumGas, minGas) } // If the deployment succeeded, we also check the gas used if minGas < 100_000 { if gasUsed != tt.gasUsed { t.Errorf("test %d: gas used mismatch: have %v, want %v", i, gasUsed, tt.gasUsed) } } } }