plugeth/cmd/evm/runner.go

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// Copyright 2017 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-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.
//
// go-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 go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
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"math/big"
"os"
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goruntime "runtime"
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"runtime/pprof"
"testing"
"time"
"github.com/ethereum/go-ethereum/cmd/evm/internal/compiler"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/core/vm/runtime"
"github.com/ethereum/go-ethereum/eth/tracers/logger"
"github.com/ethereum/go-ethereum/internal/flags"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/urfave/cli/v2"
)
var runCommand = &cli.Command{
Action: runCmd,
Name: "run",
Usage: "run arbitrary evm binary",
ArgsUsage: "<code>",
Description: `The run command runs arbitrary EVM code.`,
}
// readGenesis will read the given JSON format genesis file and return
// the initialized Genesis structure
func readGenesis(genesisPath string) *core.Genesis {
// Make sure we have a valid genesis JSON
//genesisPath := ctx.Args().First()
if len(genesisPath) == 0 {
utils.Fatalf("Must supply path to genesis JSON file")
}
file, err := os.Open(genesisPath)
if err != nil {
utils.Fatalf("Failed to read genesis file: %v", err)
}
defer file.Close()
genesis := new(core.Genesis)
if err := json.NewDecoder(file).Decode(genesis); err != nil {
utils.Fatalf("invalid genesis file: %v", err)
}
return genesis
}
type execStats struct {
time time.Duration // The execution time.
allocs int64 // The number of heap allocations during execution.
bytesAllocated int64 // The cumulative number of bytes allocated during execution.
}
func timedExec(bench bool, execFunc func() ([]byte, uint64, error)) (output []byte, gasLeft uint64, stats execStats, err error) {
if bench {
result := testing.Benchmark(func(b *testing.B) {
for i := 0; i < b.N; i++ {
output, gasLeft, err = execFunc()
}
})
// Get the average execution time from the benchmarking result.
// There are other useful stats here that could be reported.
stats.time = time.Duration(result.NsPerOp())
stats.allocs = result.AllocsPerOp()
stats.bytesAllocated = result.AllocedBytesPerOp()
} else {
var memStatsBefore, memStatsAfter goruntime.MemStats
goruntime.ReadMemStats(&memStatsBefore)
startTime := time.Now()
output, gasLeft, err = execFunc()
stats.time = time.Since(startTime)
goruntime.ReadMemStats(&memStatsAfter)
stats.allocs = int64(memStatsAfter.Mallocs - memStatsBefore.Mallocs)
stats.bytesAllocated = int64(memStatsAfter.TotalAlloc - memStatsBefore.TotalAlloc)
}
return output, gasLeft, stats, err
}
func runCmd(ctx *cli.Context) error {
glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
glogger.Verbosity(log.Lvl(ctx.Int(VerbosityFlag.Name)))
log.Root().SetHandler(glogger)
logconfig := &logger.Config{
EnableMemory: !ctx.Bool(DisableMemoryFlag.Name),
DisableStack: ctx.Bool(DisableStackFlag.Name),
DisableStorage: ctx.Bool(DisableStorageFlag.Name),
EnableReturnData: !ctx.Bool(DisableReturnDataFlag.Name),
Debug: ctx.Bool(DebugFlag.Name),
}
var (
tracer vm.EVMLogger
debugLogger *logger.StructLogger
statedb *state.StateDB
chainConfig *params.ChainConfig
sender = common.BytesToAddress([]byte("sender"))
receiver = common.BytesToAddress([]byte("receiver"))
genesisConfig *core.Genesis
)
if ctx.Bool(MachineFlag.Name) {
tracer = logger.NewJSONLogger(logconfig, os.Stdout)
} else if ctx.Bool(DebugFlag.Name) {
debugLogger = logger.NewStructLogger(logconfig)
tracer = debugLogger
} else {
debugLogger = logger.NewStructLogger(logconfig)
}
if ctx.String(GenesisFlag.Name) != "" {
gen := readGenesis(ctx.String(GenesisFlag.Name))
genesisConfig = gen
db := rawdb.NewMemoryDatabase()
genesis := gen.MustCommit(db)
statedb, _ = state.New(genesis.Root(), state.NewDatabase(db), nil)
chainConfig = gen.Config
} else {
statedb, _ = state.New(common.Hash{}, state.NewDatabase(rawdb.NewMemoryDatabase()), nil)
genesisConfig = new(core.Genesis)
}
if ctx.String(SenderFlag.Name) != "" {
sender = common.HexToAddress(ctx.String(SenderFlag.Name))
}
statedb.CreateAccount(sender)
if ctx.String(ReceiverFlag.Name) != "" {
receiver = common.HexToAddress(ctx.String(ReceiverFlag.Name))
}
var code []byte
codeFileFlag := ctx.String(CodeFileFlag.Name)
codeFlag := ctx.String(CodeFlag.Name)
// The '--code' or '--codefile' flag overrides code in state
if codeFileFlag != "" || codeFlag != "" {
var hexcode []byte
if codeFileFlag != "" {
var err error
// If - is specified, it means that code comes from stdin
if codeFileFlag == "-" {
//Try reading from stdin
if hexcode, err = io.ReadAll(os.Stdin); err != nil {
fmt.Printf("Could not load code from stdin: %v\n", err)
os.Exit(1)
}
} else {
// Codefile with hex assembly
if hexcode, err = os.ReadFile(codeFileFlag); err != nil {
fmt.Printf("Could not load code from file: %v\n", err)
os.Exit(1)
}
}
} else {
hexcode = []byte(codeFlag)
}
hexcode = bytes.TrimSpace(hexcode)
if len(hexcode)%2 != 0 {
fmt.Printf("Invalid input length for hex data (%d)\n", len(hexcode))
os.Exit(1)
}
code = common.FromHex(string(hexcode))
} else if fn := ctx.Args().First(); len(fn) > 0 {
// EASM-file to compile
src, err := os.ReadFile(fn)
if err != nil {
return err
}
bin, err := compiler.Compile(fn, src, false)
if err != nil {
return err
}
code = common.Hex2Bytes(bin)
}
initialGas := ctx.Uint64(GasFlag.Name)
if genesisConfig.GasLimit != 0 {
initialGas = genesisConfig.GasLimit
}
runtimeConfig := runtime.Config{
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Origin: sender,
State: statedb,
GasLimit: initialGas,
GasPrice: flags.GlobalBig(ctx, PriceFlag.Name),
Value: flags.GlobalBig(ctx, ValueFlag.Name),
Difficulty: genesisConfig.Difficulty,
Time: new(big.Int).SetUint64(genesisConfig.Timestamp),
Coinbase: genesisConfig.Coinbase,
BlockNumber: new(big.Int).SetUint64(genesisConfig.Number),
EVMConfig: vm.Config{
Tracer: tracer,
Debug: ctx.Bool(DebugFlag.Name) || ctx.Bool(MachineFlag.Name),
},
}
if cpuProfilePath := ctx.String(CPUProfileFlag.Name); cpuProfilePath != "" {
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f, err := os.Create(cpuProfilePath)
if err != nil {
fmt.Println("could not create CPU profile: ", err)
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os.Exit(1)
}
if err := pprof.StartCPUProfile(f); err != nil {
fmt.Println("could not start CPU profile: ", err)
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os.Exit(1)
}
defer pprof.StopCPUProfile()
}
if chainConfig != nil {
runtimeConfig.ChainConfig = chainConfig
} else {
runtimeConfig.ChainConfig = params.AllEthashProtocolChanges
}
var hexInput []byte
if inputFileFlag := ctx.String(InputFileFlag.Name); inputFileFlag != "" {
var err error
if hexInput, err = os.ReadFile(inputFileFlag); err != nil {
fmt.Printf("could not load input from file: %v\n", err)
os.Exit(1)
}
} else {
hexInput = []byte(ctx.String(InputFlag.Name))
}
hexInput = bytes.TrimSpace(hexInput)
if len(hexInput)%2 != 0 {
fmt.Println("input length must be even")
os.Exit(1)
}
input := common.FromHex(string(hexInput))
var execFunc func() ([]byte, uint64, error)
if ctx.Bool(CreateFlag.Name) {
input = append(code, input...)
execFunc = func() ([]byte, uint64, error) {
output, _, gasLeft, err := runtime.Create(input, &runtimeConfig)
return output, gasLeft, err
}
} else {
if len(code) > 0 {
statedb.SetCode(receiver, code)
}
execFunc = func() ([]byte, uint64, error) {
return runtime.Call(receiver, input, &runtimeConfig)
}
}
bench := ctx.Bool(BenchFlag.Name)
output, leftOverGas, stats, err := timedExec(bench, execFunc)
if ctx.Bool(DumpFlag.Name) {
statedb.Commit(true)
statedb.IntermediateRoot(true)
fmt.Println(string(statedb.Dump(nil)))
}
if memProfilePath := ctx.String(MemProfileFlag.Name); memProfilePath != "" {
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f, err := os.Create(memProfilePath)
if err != nil {
fmt.Println("could not create memory profile: ", err)
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os.Exit(1)
}
if err := pprof.WriteHeapProfile(f); err != nil {
fmt.Println("could not write memory profile: ", err)
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os.Exit(1)
}
f.Close()
}
if ctx.Bool(DebugFlag.Name) {
if debugLogger != nil {
fmt.Fprintln(os.Stderr, "#### TRACE ####")
logger.WriteTrace(os.Stderr, debugLogger.StructLogs())
}
fmt.Fprintln(os.Stderr, "#### LOGS ####")
logger.WriteLogs(os.Stderr, statedb.Logs())
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}
if bench || ctx.Bool(StatDumpFlag.Name) {
fmt.Fprintf(os.Stderr, `EVM gas used: %d
execution time: %v
allocations: %d
allocated bytes: %d
`, initialGas-leftOverGas, stats.time, stats.allocs, stats.bytesAllocated)
}
if tracer == nil {
fmt.Printf("%#x\n", output)
if err != nil {
fmt.Printf(" error: %v\n", err)
}
}
return nil
}