// 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/ioutil"
"math/big"
"os"
goruntime "runtime"
"runtime/pprof"
"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/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/core/vm/runtime"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
cli "gopkg.in/urfave/cli.v1"
)
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
}
func runCmd(ctx *cli.Context) error {
glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
glogger.Verbosity(log.Lvl(ctx.GlobalInt(VerbosityFlag.Name)))
log.Root().SetHandler(glogger)
logconfig := &vm.LogConfig{
DisableMemory: ctx.GlobalBool(DisableMemoryFlag.Name),
DisableStack: ctx.GlobalBool(DisableStackFlag.Name),
Debug: ctx.GlobalBool(DebugFlag.Name),
}
var (
tracer vm.Tracer
debugLogger *vm.StructLogger
statedb *state.StateDB
chainConfig *params.ChainConfig
sender = common.BytesToAddress([]byte("sender"))
receiver = common.BytesToAddress([]byte("receiver"))
genesisConfig *core.Genesis
)
if ctx.GlobalBool(MachineFlag.Name) {
tracer = vm.NewJSONLogger(logconfig, os.Stdout)
} else if ctx.GlobalBool(DebugFlag.Name) {
debugLogger = vm.NewStructLogger(logconfig)
tracer = debugLogger
} else {
debugLogger = vm.NewStructLogger(logconfig)
}
if ctx.GlobalString(GenesisFlag.Name) != "" {
gen := readGenesis(ctx.GlobalString(GenesisFlag.Name))
genesisConfig = gen
db := ethdb.NewMemDatabase()
genesis := gen.ToBlock(db)
statedb, _ = state.New(genesis.Root(), state.NewDatabase(db))
chainConfig = gen.Config
} else {
statedb, _ = state.New(common.Hash{}, state.NewDatabase(ethdb.NewMemDatabase()))
genesisConfig = new(core.Genesis)
}
if ctx.GlobalString(SenderFlag.Name) != "" {
sender = common.HexToAddress(ctx.GlobalString(SenderFlag.Name))
}
statedb.CreateAccount(sender)
if ctx.GlobalString(ReceiverFlag.Name) != "" {
receiver = common.HexToAddress(ctx.GlobalString(ReceiverFlag.Name))
}
var (
code []byte
ret []byte
err error
)
// The '--code' or '--codefile' flag overrides code in state
if ctx.GlobalString(CodeFileFlag.Name) != "" {
var hexcode []byte
var err error
// If - is specified, it means that code comes from stdin
if ctx.GlobalString(CodeFileFlag.Name) == "-" {
//Try reading from stdin
if hexcode, err = ioutil.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 = ioutil.ReadFile(ctx.GlobalString(CodeFileFlag.Name)); err != nil {
fmt.Printf("Could not load code from file: %v\n", err)
os.Exit(1)
}
}
code = common.Hex2Bytes(string(bytes.TrimRight(hexcode, "\n")))
} else if ctx.GlobalString(CodeFlag.Name) != "" {
code = common.Hex2Bytes(ctx.GlobalString(CodeFlag.Name))
} else if fn := ctx.Args().First(); len(fn) > 0 {
// EASM-file to compile
src, err := ioutil.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.GlobalUint64(GasFlag.Name)
if genesisConfig.GasLimit != 0 {
initialGas = genesisConfig.GasLimit
}
runtimeConfig := runtime.Config{
Origin: sender,
State: statedb,
GasLimit: initialGas,
GasPrice: utils.GlobalBig(ctx, PriceFlag.Name),
Value: utils.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.GlobalBool(DebugFlag.Name) || ctx.GlobalBool(MachineFlag.Name),
EVMInterpreter: ctx.GlobalString(EVMInterpreterFlag.Name),
},
}
if cpuProfilePath := ctx.GlobalString(CPUProfileFlag.Name); cpuProfilePath != "" {
f, err := os.Create(cpuProfilePath)
if err != nil {
fmt.Println("could not create CPU profile: ", err)
os.Exit(1)
}
if err := pprof.StartCPUProfile(f); err != nil {
fmt.Println("could not start CPU profile: ", err)
os.Exit(1)
}
defer pprof.StopCPUProfile()
}
if chainConfig != nil {
runtimeConfig.ChainConfig = chainConfig
}
tstart := time.Now()
var leftOverGas uint64
if ctx.GlobalBool(CreateFlag.Name) {
input := append(code, common.Hex2Bytes(ctx.GlobalString(InputFlag.Name))...)
ret, _, leftOverGas, err = runtime.Create(input, &runtimeConfig)
} else {
if len(code) > 0 {
statedb.SetCode(receiver, code)
}
ret, leftOverGas, err = runtime.Call(receiver, common.Hex2Bytes(ctx.GlobalString(InputFlag.Name)), &runtimeConfig)
}
execTime := time.Since(tstart)
if ctx.GlobalBool(DumpFlag.Name) {
statedb.Commit(true)
statedb.IntermediateRoot(true)
fmt.Println(string(statedb.Dump()))
}
if memProfilePath := ctx.GlobalString(MemProfileFlag.Name); memProfilePath != "" {
f, err := os.Create(memProfilePath)
if err != nil {
fmt.Println("could not create memory profile: ", err)
os.Exit(1)
}
if err := pprof.WriteHeapProfile(f); err != nil {
fmt.Println("could not write memory profile: ", err)
os.Exit(1)
}
f.Close()
}
if ctx.GlobalBool(DebugFlag.Name) {
if debugLogger != nil {
fmt.Fprintln(os.Stderr, "#### TRACE ####")
vm.WriteTrace(os.Stderr, debugLogger.StructLogs())
}
fmt.Fprintln(os.Stderr, "#### LOGS ####")
vm.WriteLogs(os.Stderr, statedb.Logs())
}
if ctx.GlobalBool(StatDumpFlag.Name) {
var mem goruntime.MemStats
goruntime.ReadMemStats(&mem)
fmt.Fprintf(os.Stderr, `evm execution time: %v
heap objects: %d
allocations: %d
total allocations: %d
GC calls: %d
Gas used: %d
`, execTime, mem.HeapObjects, mem.Alloc, mem.TotalAlloc, mem.NumGC, initialGas-leftOverGas)
}
if tracer == nil {
fmt.Printf("0x%x\n", ret)
if err != nil {
fmt.Printf(" error: %v\n", err)
}
}
return nil
}
