0fda25e471
Fixes the CaptureStart api to include the EVM, thus being able to set the statedb early on. This pr also exposes the struct we used internally in the interpreter to encapsulate the contract, mem, stack, rstack, so we pass it as a single struct to the tracer, and removes the error returns on the capture methods.
611 lines
22 KiB
Go
611 lines
22 KiB
Go
// Copyright 2015 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 runtime
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import (
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"fmt"
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"math/big"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/accounts/abi"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/asm"
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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/core/vm"
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"github.com/ethereum/go-ethereum/params"
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)
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func TestDefaults(t *testing.T) {
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cfg := new(Config)
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setDefaults(cfg)
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if cfg.Difficulty == nil {
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t.Error("expected difficulty to be non nil")
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}
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if cfg.Time == nil {
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t.Error("expected time to be non nil")
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}
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if cfg.GasLimit == 0 {
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t.Error("didn't expect gaslimit to be zero")
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}
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if cfg.GasPrice == nil {
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t.Error("expected time to be non nil")
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}
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if cfg.Value == nil {
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t.Error("expected time to be non nil")
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}
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if cfg.GetHashFn == nil {
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t.Error("expected time to be non nil")
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}
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if cfg.BlockNumber == nil {
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t.Error("expected block number to be non nil")
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}
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}
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func TestEVM(t *testing.T) {
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defer func() {
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if r := recover(); r != nil {
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t.Fatalf("crashed with: %v", r)
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}
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}()
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Execute([]byte{
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byte(vm.DIFFICULTY),
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byte(vm.TIMESTAMP),
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byte(vm.GASLIMIT),
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byte(vm.PUSH1),
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byte(vm.ORIGIN),
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byte(vm.BLOCKHASH),
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byte(vm.COINBASE),
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}, nil, nil)
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}
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func TestExecute(t *testing.T) {
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ret, _, err := Execute([]byte{
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byte(vm.PUSH1), 10,
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byte(vm.PUSH1), 0,
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byte(vm.MSTORE),
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byte(vm.PUSH1), 32,
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byte(vm.PUSH1), 0,
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byte(vm.RETURN),
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}, nil, nil)
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if err != nil {
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t.Fatal("didn't expect error", err)
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}
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num := new(big.Int).SetBytes(ret)
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if num.Cmp(big.NewInt(10)) != 0 {
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t.Error("Expected 10, got", num)
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}
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}
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func TestCall(t *testing.T) {
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state, _ := state.New(common.Hash{}, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
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address := common.HexToAddress("0x0a")
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state.SetCode(address, []byte{
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byte(vm.PUSH1), 10,
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byte(vm.PUSH1), 0,
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byte(vm.MSTORE),
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byte(vm.PUSH1), 32,
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byte(vm.PUSH1), 0,
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byte(vm.RETURN),
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})
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ret, _, err := Call(address, nil, &Config{State: state})
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if err != nil {
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t.Fatal("didn't expect error", err)
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}
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num := new(big.Int).SetBytes(ret)
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if num.Cmp(big.NewInt(10)) != 0 {
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t.Error("Expected 10, got", num)
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}
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}
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func BenchmarkCall(b *testing.B) {
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var definition = `[{"constant":true,"inputs":[],"name":"seller","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[],"name":"abort","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"value","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[],"name":"refund","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"buyer","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[],"name":"confirmReceived","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"state","outputs":[{"name":"","type":"uint8"}],"type":"function"},{"constant":false,"inputs":[],"name":"confirmPurchase","outputs":[],"type":"function"},{"inputs":[],"type":"constructor"},{"anonymous":false,"inputs":[],"name":"Aborted","type":"event"},{"anonymous":false,"inputs":[],"name":"PurchaseConfirmed","type":"event"},{"anonymous":false,"inputs":[],"name":"ItemReceived","type":"event"},{"anonymous":false,"inputs":[],"name":"Refunded","type":"event"}]`
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var code = common.Hex2Bytes("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")
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abi, err := abi.JSON(strings.NewReader(definition))
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if err != nil {
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b.Fatal(err)
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}
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cpurchase, err := abi.Pack("confirmPurchase")
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if err != nil {
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b.Fatal(err)
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}
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creceived, err := abi.Pack("confirmReceived")
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if err != nil {
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b.Fatal(err)
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}
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refund, err := abi.Pack("refund")
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if err != nil {
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b.Fatal(err)
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}
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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for j := 0; j < 400; j++ {
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Execute(code, cpurchase, nil)
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Execute(code, creceived, nil)
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Execute(code, refund, nil)
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}
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}
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}
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func benchmarkEVM_Create(bench *testing.B, code string) {
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var (
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statedb, _ = state.New(common.Hash{}, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
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sender = common.BytesToAddress([]byte("sender"))
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receiver = common.BytesToAddress([]byte("receiver"))
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)
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statedb.CreateAccount(sender)
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statedb.SetCode(receiver, common.FromHex(code))
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runtimeConfig := Config{
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Origin: sender,
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State: statedb,
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GasLimit: 10000000,
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Difficulty: big.NewInt(0x200000),
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Time: new(big.Int).SetUint64(0),
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Coinbase: common.Address{},
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BlockNumber: new(big.Int).SetUint64(1),
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ChainConfig: ¶ms.ChainConfig{
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ChainID: big.NewInt(1),
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HomesteadBlock: new(big.Int),
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ByzantiumBlock: new(big.Int),
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ConstantinopleBlock: new(big.Int),
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DAOForkBlock: new(big.Int),
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DAOForkSupport: false,
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EIP150Block: new(big.Int),
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EIP155Block: new(big.Int),
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EIP158Block: new(big.Int),
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},
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EVMConfig: vm.Config{},
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}
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// Warm up the intpools and stuff
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bench.ResetTimer()
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for i := 0; i < bench.N; i++ {
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Call(receiver, []byte{}, &runtimeConfig)
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}
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bench.StopTimer()
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}
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func BenchmarkEVM_CREATE_500(bench *testing.B) {
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// initcode size 500K, repeatedly calls CREATE and then modifies the mem contents
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benchmarkEVM_Create(bench, "5b6207a120600080f0600152600056")
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}
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func BenchmarkEVM_CREATE2_500(bench *testing.B) {
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// initcode size 500K, repeatedly calls CREATE2 and then modifies the mem contents
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benchmarkEVM_Create(bench, "5b586207a120600080f5600152600056")
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}
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func BenchmarkEVM_CREATE_1200(bench *testing.B) {
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// initcode size 1200K, repeatedly calls CREATE and then modifies the mem contents
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benchmarkEVM_Create(bench, "5b62124f80600080f0600152600056")
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}
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func BenchmarkEVM_CREATE2_1200(bench *testing.B) {
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// initcode size 1200K, repeatedly calls CREATE2 and then modifies the mem contents
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benchmarkEVM_Create(bench, "5b5862124f80600080f5600152600056")
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}
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func fakeHeader(n uint64, parentHash common.Hash) *types.Header {
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header := types.Header{
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Coinbase: common.HexToAddress("0x00000000000000000000000000000000deadbeef"),
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Number: big.NewInt(int64(n)),
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ParentHash: parentHash,
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Time: 1000,
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Nonce: types.BlockNonce{0x1},
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Extra: []byte{},
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Difficulty: big.NewInt(0),
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GasLimit: 100000,
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}
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return &header
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}
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type dummyChain struct {
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counter int
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}
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// Engine retrieves the chain's consensus engine.
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func (d *dummyChain) Engine() consensus.Engine {
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return nil
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}
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// GetHeader returns the hash corresponding to their hash.
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func (d *dummyChain) GetHeader(h common.Hash, n uint64) *types.Header {
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d.counter++
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parentHash := common.Hash{}
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s := common.LeftPadBytes(big.NewInt(int64(n-1)).Bytes(), 32)
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copy(parentHash[:], s)
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//parentHash := common.Hash{byte(n - 1)}
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//fmt.Printf("GetHeader(%x, %d) => header with parent %x\n", h, n, parentHash)
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return fakeHeader(n, parentHash)
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}
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// TestBlockhash tests the blockhash operation. It's a bit special, since it internally
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// requires access to a chain reader.
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func TestBlockhash(t *testing.T) {
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// Current head
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n := uint64(1000)
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parentHash := common.Hash{}
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s := common.LeftPadBytes(big.NewInt(int64(n-1)).Bytes(), 32)
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copy(parentHash[:], s)
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header := fakeHeader(n, parentHash)
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// This is the contract we're using. It requests the blockhash for current num (should be all zeroes),
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// then iteratively fetches all blockhashes back to n-260.
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// It returns
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// 1. the first (should be zero)
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// 2. the second (should be the parent hash)
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// 3. the last non-zero hash
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// By making the chain reader return hashes which correlate to the number, we can
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// verify that it obtained the right hashes where it should
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/*
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pragma solidity ^0.5.3;
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contract Hasher{
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function test() public view returns (bytes32, bytes32, bytes32){
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uint256 x = block.number;
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bytes32 first;
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bytes32 last;
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bytes32 zero;
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zero = blockhash(x); // Should be zeroes
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first = blockhash(x-1);
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for(uint256 i = 2 ; i < 260; i++){
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bytes32 hash = blockhash(x - i);
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if (uint256(hash) != 0){
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last = hash;
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}
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}
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return (zero, first, last);
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}
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}
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*/
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// The contract above
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data := common.Hex2Bytes("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")
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// The method call to 'test()'
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input := common.Hex2Bytes("f8a8fd6d")
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chain := &dummyChain{}
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ret, _, err := Execute(data, input, &Config{
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GetHashFn: core.GetHashFn(header, chain),
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BlockNumber: new(big.Int).Set(header.Number),
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})
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if err != nil {
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t.Fatalf("expected no error, got %v", err)
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}
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if len(ret) != 96 {
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t.Fatalf("expected returndata to be 96 bytes, got %d", len(ret))
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}
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zero := new(big.Int).SetBytes(ret[0:32])
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first := new(big.Int).SetBytes(ret[32:64])
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last := new(big.Int).SetBytes(ret[64:96])
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if zero.BitLen() != 0 {
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t.Fatalf("expected zeroes, got %x", ret[0:32])
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}
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if first.Uint64() != 999 {
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t.Fatalf("second block should be 999, got %d (%x)", first, ret[32:64])
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}
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if last.Uint64() != 744 {
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t.Fatalf("last block should be 744, got %d (%x)", last, ret[64:96])
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}
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if exp, got := 255, chain.counter; exp != got {
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t.Errorf("suboptimal; too much chain iteration, expected %d, got %d", exp, got)
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}
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}
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type stepCounter struct {
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inner *vm.JSONLogger
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steps int
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}
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func (s *stepCounter) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
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}
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func (s *stepCounter) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
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}
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func (s *stepCounter) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {}
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func (s *stepCounter) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
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s.steps++
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// Enable this for more output
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//s.inner.CaptureState(env, pc, op, gas, cost, memory, stack, rStack, contract, depth, err)
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}
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// benchmarkNonModifyingCode benchmarks code, but if the code modifies the
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// state, this should not be used, since it does not reset the state between runs.
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func benchmarkNonModifyingCode(gas uint64, code []byte, name string, b *testing.B) {
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cfg := new(Config)
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setDefaults(cfg)
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cfg.State, _ = state.New(common.Hash{}, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
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cfg.GasLimit = gas
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var (
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destination = common.BytesToAddress([]byte("contract"))
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vmenv = NewEnv(cfg)
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sender = vm.AccountRef(cfg.Origin)
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)
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cfg.State.CreateAccount(destination)
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eoa := common.HexToAddress("E0")
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{
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cfg.State.CreateAccount(eoa)
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cfg.State.SetNonce(eoa, 100)
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}
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reverting := common.HexToAddress("EE")
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{
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cfg.State.CreateAccount(reverting)
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cfg.State.SetCode(reverting, []byte{
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byte(vm.PUSH1), 0x00,
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byte(vm.PUSH1), 0x00,
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byte(vm.REVERT),
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})
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}
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//cfg.State.CreateAccount(cfg.Origin)
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// set the receiver's (the executing contract) code for execution.
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cfg.State.SetCode(destination, code)
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vmenv.Call(sender, destination, nil, gas, cfg.Value)
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b.Run(name, func(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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vmenv.Call(sender, destination, nil, gas, cfg.Value)
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}
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})
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}
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// BenchmarkSimpleLoop test a pretty simple loop which loops until OOG
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// 55 ms
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func BenchmarkSimpleLoop(b *testing.B) {
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staticCallIdentity := []byte{
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byte(vm.JUMPDEST), // [ count ]
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// push args for the call
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byte(vm.PUSH1), 0, // out size
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byte(vm.DUP1), // out offset
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byte(vm.DUP1), // out insize
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byte(vm.DUP1), // in offset
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byte(vm.PUSH1), 0x4, // address of identity
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byte(vm.GAS), // gas
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byte(vm.STATICCALL),
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byte(vm.POP), // pop return value
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byte(vm.PUSH1), 0, // jumpdestination
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byte(vm.JUMP),
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}
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callIdentity := []byte{
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byte(vm.JUMPDEST), // [ count ]
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// push args for the call
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byte(vm.PUSH1), 0, // out size
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byte(vm.DUP1), // out offset
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byte(vm.DUP1), // out insize
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byte(vm.DUP1), // in offset
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byte(vm.DUP1), // value
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byte(vm.PUSH1), 0x4, // address of identity
|
|
byte(vm.GAS), // gas
|
|
byte(vm.CALL),
|
|
byte(vm.POP), // pop return value
|
|
byte(vm.PUSH1), 0, // jumpdestination
|
|
byte(vm.JUMP),
|
|
}
|
|
|
|
callInexistant := []byte{
|
|
byte(vm.JUMPDEST), // [ count ]
|
|
// push args for the call
|
|
byte(vm.PUSH1), 0, // out size
|
|
byte(vm.DUP1), // out offset
|
|
byte(vm.DUP1), // out insize
|
|
byte(vm.DUP1), // in offset
|
|
byte(vm.DUP1), // value
|
|
byte(vm.PUSH1), 0xff, // address of existing contract
|
|
byte(vm.GAS), // gas
|
|
byte(vm.CALL),
|
|
byte(vm.POP), // pop return value
|
|
byte(vm.PUSH1), 0, // jumpdestination
|
|
byte(vm.JUMP),
|
|
}
|
|
|
|
callEOA := []byte{
|
|
byte(vm.JUMPDEST), // [ count ]
|
|
// push args for the call
|
|
byte(vm.PUSH1), 0, // out size
|
|
byte(vm.DUP1), // out offset
|
|
byte(vm.DUP1), // out insize
|
|
byte(vm.DUP1), // in offset
|
|
byte(vm.DUP1), // value
|
|
byte(vm.PUSH1), 0xE0, // address of EOA
|
|
byte(vm.GAS), // gas
|
|
byte(vm.CALL),
|
|
byte(vm.POP), // pop return value
|
|
byte(vm.PUSH1), 0, // jumpdestination
|
|
byte(vm.JUMP),
|
|
}
|
|
|
|
loopingCode := []byte{
|
|
byte(vm.JUMPDEST), // [ count ]
|
|
// push args for the call
|
|
byte(vm.PUSH1), 0, // out size
|
|
byte(vm.DUP1), // out offset
|
|
byte(vm.DUP1), // out insize
|
|
byte(vm.DUP1), // in offset
|
|
byte(vm.PUSH1), 0x4, // address of identity
|
|
byte(vm.GAS), // gas
|
|
|
|
byte(vm.POP), byte(vm.POP), byte(vm.POP), byte(vm.POP), byte(vm.POP), byte(vm.POP),
|
|
byte(vm.PUSH1), 0, // jumpdestination
|
|
byte(vm.JUMP),
|
|
}
|
|
|
|
calllRevertingContractWithInput := []byte{
|
|
byte(vm.JUMPDEST), //
|
|
// push args for the call
|
|
byte(vm.PUSH1), 0, // out size
|
|
byte(vm.DUP1), // out offset
|
|
byte(vm.PUSH1), 0x20, // in size
|
|
byte(vm.PUSH1), 0x00, // in offset
|
|
byte(vm.PUSH1), 0x00, // value
|
|
byte(vm.PUSH1), 0xEE, // address of reverting contract
|
|
byte(vm.GAS), // gas
|
|
byte(vm.CALL),
|
|
byte(vm.POP), // pop return value
|
|
byte(vm.PUSH1), 0, // jumpdestination
|
|
byte(vm.JUMP),
|
|
}
|
|
|
|
//tracer := vm.NewJSONLogger(nil, os.Stdout)
|
|
//Execute(loopingCode, nil, &Config{
|
|
// EVMConfig: vm.Config{
|
|
// Debug: true,
|
|
// Tracer: tracer,
|
|
// }})
|
|
// 100M gas
|
|
benchmarkNonModifyingCode(100000000, staticCallIdentity, "staticcall-identity-100M", b)
|
|
benchmarkNonModifyingCode(100000000, callIdentity, "call-identity-100M", b)
|
|
benchmarkNonModifyingCode(100000000, loopingCode, "loop-100M", b)
|
|
benchmarkNonModifyingCode(100000000, callInexistant, "call-nonexist-100M", b)
|
|
benchmarkNonModifyingCode(100000000, callEOA, "call-EOA-100M", b)
|
|
benchmarkNonModifyingCode(100000000, calllRevertingContractWithInput, "call-reverting-100M", b)
|
|
|
|
//benchmarkNonModifyingCode(10000000, staticCallIdentity, "staticcall-identity-10M", b)
|
|
//benchmarkNonModifyingCode(10000000, loopingCode, "loop-10M", b)
|
|
}
|
|
|
|
// TestEip2929Cases contains various testcases that are used for
|
|
// EIP-2929 about gas repricings
|
|
func TestEip2929Cases(t *testing.T) {
|
|
|
|
id := 1
|
|
prettyPrint := func(comment string, code []byte) {
|
|
|
|
instrs := make([]string, 0)
|
|
it := asm.NewInstructionIterator(code)
|
|
for it.Next() {
|
|
if it.Arg() != nil && 0 < len(it.Arg()) {
|
|
instrs = append(instrs, fmt.Sprintf("%v 0x%x", it.Op(), it.Arg()))
|
|
} else {
|
|
instrs = append(instrs, fmt.Sprintf("%v", it.Op()))
|
|
}
|
|
}
|
|
ops := strings.Join(instrs, ", ")
|
|
fmt.Printf("### Case %d\n\n", id)
|
|
id++
|
|
fmt.Printf("%v\n\nBytecode: \n```\n0x%x\n```\nOperations: \n```\n%v\n```\n\n",
|
|
comment,
|
|
code, ops)
|
|
Execute(code, nil, &Config{
|
|
EVMConfig: vm.Config{
|
|
Debug: true,
|
|
Tracer: vm.NewMarkdownLogger(nil, os.Stdout),
|
|
ExtraEips: []int{2929},
|
|
},
|
|
})
|
|
}
|
|
|
|
{ // First eip testcase
|
|
code := []byte{
|
|
// Three checks against a precompile
|
|
byte(vm.PUSH1), 1, byte(vm.EXTCODEHASH), byte(vm.POP),
|
|
byte(vm.PUSH1), 2, byte(vm.EXTCODESIZE), byte(vm.POP),
|
|
byte(vm.PUSH1), 3, byte(vm.BALANCE), byte(vm.POP),
|
|
// Three checks against a non-precompile
|
|
byte(vm.PUSH1), 0xf1, byte(vm.EXTCODEHASH), byte(vm.POP),
|
|
byte(vm.PUSH1), 0xf2, byte(vm.EXTCODESIZE), byte(vm.POP),
|
|
byte(vm.PUSH1), 0xf3, byte(vm.BALANCE), byte(vm.POP),
|
|
// Same three checks (should be cheaper)
|
|
byte(vm.PUSH1), 0xf2, byte(vm.EXTCODEHASH), byte(vm.POP),
|
|
byte(vm.PUSH1), 0xf3, byte(vm.EXTCODESIZE), byte(vm.POP),
|
|
byte(vm.PUSH1), 0xf1, byte(vm.BALANCE), byte(vm.POP),
|
|
// Check the origin, and the 'this'
|
|
byte(vm.ORIGIN), byte(vm.BALANCE), byte(vm.POP),
|
|
byte(vm.ADDRESS), byte(vm.BALANCE), byte(vm.POP),
|
|
|
|
byte(vm.STOP),
|
|
}
|
|
prettyPrint("This checks `EXT`(codehash,codesize,balance) of precompiles, which should be `100`, "+
|
|
"and later checks the same operations twice against some non-precompiles. "+
|
|
"Those are cheaper second time they are accessed. Lastly, it checks the `BALANCE` of `origin` and `this`.", code)
|
|
}
|
|
|
|
{ // EXTCODECOPY
|
|
code := []byte{
|
|
// extcodecopy( 0xff,0,0,0,0)
|
|
byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, //length, codeoffset, memoffset
|
|
byte(vm.PUSH1), 0xff, byte(vm.EXTCODECOPY),
|
|
// extcodecopy( 0xff,0,0,0,0)
|
|
byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, //length, codeoffset, memoffset
|
|
byte(vm.PUSH1), 0xff, byte(vm.EXTCODECOPY),
|
|
// extcodecopy( this,0,0,0,0)
|
|
byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, byte(vm.PUSH1), 0x00, //length, codeoffset, memoffset
|
|
byte(vm.ADDRESS), byte(vm.EXTCODECOPY),
|
|
|
|
byte(vm.STOP),
|
|
}
|
|
prettyPrint("This checks `extcodecopy( 0xff,0,0,0,0)` twice, (should be expensive first time), "+
|
|
"and then does `extcodecopy( this,0,0,0,0)`.", code)
|
|
}
|
|
|
|
{ // SLOAD + SSTORE
|
|
code := []byte{
|
|
|
|
// Add slot `0x1` to access list
|
|
byte(vm.PUSH1), 0x01, byte(vm.SLOAD), byte(vm.POP), // SLOAD( 0x1) (add to access list)
|
|
// Write to `0x1` which is already in access list
|
|
byte(vm.PUSH1), 0x11, byte(vm.PUSH1), 0x01, byte(vm.SSTORE), // SSTORE( loc: 0x01, val: 0x11)
|
|
// Write to `0x2` which is not in access list
|
|
byte(vm.PUSH1), 0x11, byte(vm.PUSH1), 0x02, byte(vm.SSTORE), // SSTORE( loc: 0x02, val: 0x11)
|
|
// Write again to `0x2`
|
|
byte(vm.PUSH1), 0x11, byte(vm.PUSH1), 0x02, byte(vm.SSTORE), // SSTORE( loc: 0x02, val: 0x11)
|
|
// Read slot in access list (0x2)
|
|
byte(vm.PUSH1), 0x02, byte(vm.SLOAD), // SLOAD( 0x2)
|
|
// Read slot in access list (0x1)
|
|
byte(vm.PUSH1), 0x01, byte(vm.SLOAD), // SLOAD( 0x1)
|
|
}
|
|
prettyPrint("This checks `sload( 0x1)` followed by `sstore(loc: 0x01, val:0x11)`, then 'naked' sstore:"+
|
|
"`sstore(loc: 0x02, val:0x11)` twice, and `sload(0x2)`, `sload(0x1)`. ", code)
|
|
}
|
|
{ // Call variants
|
|
code := []byte{
|
|
// identity precompile
|
|
byte(vm.PUSH1), 0x0, byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1),
|
|
byte(vm.PUSH1), 0x04, byte(vm.PUSH1), 0x0, byte(vm.CALL), byte(vm.POP),
|
|
|
|
// random account - call 1
|
|
byte(vm.PUSH1), 0x0, byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1),
|
|
byte(vm.PUSH1), 0xff, byte(vm.PUSH1), 0x0, byte(vm.CALL), byte(vm.POP),
|
|
|
|
// random account - call 2
|
|
byte(vm.PUSH1), 0x0, byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1),
|
|
byte(vm.PUSH1), 0xff, byte(vm.PUSH1), 0x0, byte(vm.STATICCALL), byte(vm.POP),
|
|
}
|
|
prettyPrint("This calls the `identity`-precompile (cheap), then calls an account (expensive) and `staticcall`s the same"+
|
|
"account (cheap)", code)
|
|
}
|
|
}
|