gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

cmd/evm: add --prestate, --sender, --json flags for fuzzing (#14476)

Browse Source
This commit is contained in:
Martin Holst Swende
2017-06-07 17:09:08 +02:00
committed by Felix Lange
parent bc24b7a912
commit 80f7c6c299
8 changed files with 295 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
cmd/evm/json_logger.go Normal file
View File

@ -0,0 +1,60 @@
// 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 <http://www.gnu.org/licenses/>.
package main
import (
"encoding/json"
"io"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core/vm"
)
type JSONLogger struct {
encoder *json.Encoder
}
func NewJSONLogger(writer io.Writer) *JSONLogger {
return &JSONLogger{json.NewEncoder(writer)}
}
// CaptureState outputs state information on the logger.
func (l *JSONLogger) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
return l.encoder.Encode(vm.StructLog{
Pc: pc,
Op: op,
Gas: gas + cost,
GasCost: cost,
Memory: memory.Data(),
Stack: stack.Data(),
Storage: nil,
Depth: depth,
Err: err,
})
}
// CaptureEnd is triggered at end of execution.
func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration) error {
type endLog struct {
Output string `json:"output"`
GasUsed math.HexOrDecimal64 `json:"gasUsed"`
Time time.Duration `json:"time"`
}
return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t})
}

15
cmd/evm/main.go
View File

@ -90,6 +90,18 @@ var (
Name: "nogasmetering",
Usage: "disable gas metering",
}
GenesisFlag = cli.StringFlag{
Name: "prestate",
Usage: "JSON file with prestate (genesis) config",
}
MachineFlag = cli.BoolFlag{
Name: "json",
Usage: "output trace logs in machine readable format (json)",
}
SenderFlag = cli.StringFlag{
Name: "sender",
Usage: "The transaction origin",
}
)
func init() {
@ -108,6 +120,9 @@ func init() {
MemProfileFlag,
CPUProfileFlag,
StatDumpFlag,
GenesisFlag,
MachineFlag,
SenderFlag,
}
app.Commands = []cli.Command{
compileCommand,

87
cmd/evm/runner.go
View File

@ -18,6 +18,7 @@ package main
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
@ -29,11 +30,13 @@ import (
"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"
)
@ -45,17 +48,59 @@ var runCommand = cli.Command{
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)
var (
db, _ = ethdb.NewMemDatabase()
statedb, _ = state.New(common.Hash{}, db)
sender = common.StringToAddress("sender")
logger = vm.NewStructLogger(nil)
tracer vm.Tracer
debugLogger *vm.StructLogger
statedb *state.StateDB
chainConfig *params.ChainConfig
sender = common.StringToAddress("sender")
)
if ctx.GlobalBool(MachineFlag.Name) {
tracer = NewJSONLogger(os.Stdout)
} else if ctx.GlobalBool(DebugFlag.Name) {
debugLogger = vm.NewStructLogger(nil)
tracer = debugLogger
} else {
debugLogger = vm.NewStructLogger(nil)
}
if ctx.GlobalString(GenesisFlag.Name) != "" {
gen := readGenesis(ctx.GlobalString(GenesisFlag.Name))
_, statedb = gen.ToBlock()
chainConfig = gen.Config
} else {
var db, _ = ethdb.NewMemDatabase()
statedb, _ = state.New(common.Hash{}, db)
}
if ctx.GlobalString(SenderFlag.Name) != "" {
sender = common.HexToAddress(ctx.GlobalString(SenderFlag.Name))
}
statedb.CreateAccount(sender)
var (
@ -95,16 +140,16 @@ func runCmd(ctx *cli.Context) error {
}
code = common.Hex2Bytes(string(bytes.TrimRight(hexcode, "\n")))
}
initialGas := ctx.GlobalUint64(GasFlag.Name)
runtimeConfig := runtime.Config{
Origin: sender,
State: statedb,
GasLimit: ctx.GlobalUint64(GasFlag.Name),
GasLimit: initialGas,
GasPrice: utils.GlobalBig(ctx, PriceFlag.Name),
Value: utils.GlobalBig(ctx, ValueFlag.Name),
EVMConfig: vm.Config{
Tracer: logger,
Debug: ctx.GlobalBool(DebugFlag.Name),
Tracer: tracer,
Debug: ctx.GlobalBool(DebugFlag.Name) || ctx.GlobalBool(MachineFlag.Name),
DisableGasMetering: ctx.GlobalBool(DisableGasMeteringFlag.Name),
},
}
@ -122,15 +167,19 @@ func runCmd(ctx *cli.Context) error {
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, _, err = runtime.Create(input, &runtimeConfig)
ret, _, leftOverGas, err = runtime.Create(input, &runtimeConfig)
} else {
receiver := common.StringToAddress("receiver")
statedb.SetCode(receiver, code)
ret, err = runtime.Call(receiver, common.Hex2Bytes(ctx.GlobalString(InputFlag.Name)), &runtimeConfig)
ret, leftOverGas, err = runtime.Call(receiver, common.Hex2Bytes(ctx.GlobalString(InputFlag.Name)), &runtimeConfig)
}
execTime := time.Since(tstart)
@ -153,8 +202,10 @@ func runCmd(ctx *cli.Context) error {
}
if ctx.GlobalBool(DebugFlag.Name) {
fmt.Fprintln(os.Stderr, "#### TRACE ####")
vm.WriteTrace(os.Stderr, logger.StructLogs())
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())
}
@ -167,14 +218,18 @@ heap objects: %d
allocations: %d
total allocations: %d
GC calls: %d
Gas used: %d
`, execTime, mem.HeapObjects, mem.Alloc, mem.TotalAlloc, mem.NumGC)
`, execTime, mem.HeapObjects, mem.Alloc, mem.TotalAlloc, mem.NumGC, initialGas-leftOverGas)
}
if tracer != nil {
tracer.CaptureEnd(ret, initialGas-leftOverGas, execTime)
} else {
fmt.Printf("0x%x\n", ret)
}
fmt.Printf("0x%x", ret)
if err != nil {
fmt.Printf(" error: %v", err)
fmt.Printf(" error: %v\n", err)
}
fmt.Println()
return nil
}