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cmd/evm: t8n support custom tracers (#28557)

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This change implements ability for the `evm t8n` tool to use custom tracers; either 'native' golang tracers or javascript tracers.
This commit is contained in:
Delweng 2023-12-18 22:16:25 +08:00 committed by GitHub
parent 553bafc127
commit c18c5c3d92
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 119 additions and 51 deletions
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2
cmd/evm/internal/t8ntool/execution.go
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@ -117,7 +117,7 @@ type rejectedTx struct {
// Apply applies a set of transactions to a pre-state
func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
txIt txIterator, miningReward int64,
getTracerFn func(txIndex int, txHash common.Hash) (tracer vm.EVMLogger, err error)) (*state.StateDB, *ExecutionResult, []byte, error) {
getTracerFn func(txIndex int, txHash common.Hash) (vm.EVMLogger, error)) (*state.StateDB, *ExecutionResult, []byte, error) {
// Capture errors for BLOCKHASH operation, if we haven't been supplied the
// required blockhashes
var hashError error

18
cmd/evm/internal/t8ntool/flags.go
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@ -28,12 +28,15 @@ import (
var (
TraceFlag = &cli.BoolFlag{
Name: "trace",
Usage: "Output full trace logs to files <txhash>.jsonl",
Usage: "Configures the use of the JSON opcode tracer. This tracer emits traces to files as trace-<txIndex>-<txHash>.jsonl",
}
TraceDisableMemoryFlag = &cli.BoolFlag{
Name: "trace.nomemory",
Value: true,
Usage: "Disable full memory dump in traces (deprecated)",
TraceTracerFlag = &cli.StringFlag{
Name: "trace.tracer",
Usage: "Configures the use of a custom tracer, e.g native or js tracers. Examples are callTracer and 4byteTracer. These tracers emit results into files as trace-<txIndex>-<txHash>.json",
}
TraceTracerConfigFlag = &cli.StringFlag{
Name: "trace.jsonconfig",
Usage: "The configurations for the custom tracer specified by --trace.tracer. If provided, must be in JSON format",
}
TraceEnableMemoryFlag = &cli.BoolFlag{
Name: "trace.memory",
@ -43,11 +46,6 @@ var (
Name: "trace.nostack",
Usage: "Disable stack output in traces",
}
TraceDisableReturnDataFlag = &cli.BoolFlag{
Name: "trace.noreturndata",
Value: true,
Usage: "Disable return data output in traces (deprecated)",
}
TraceEnableReturnDataFlag = &cli.BoolFlag{
Name: "trace.returndata",
Usage: "Enable return data output in traces",

81
cmd/evm/internal/t8ntool/tracewriter.go Normal file
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@ -0,0 +1,81 @@
// Copyright 2020 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 t8ntool
import (
"encoding/json"
"io"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers"
"github.com/ethereum/go-ethereum/log"
)
// traceWriter is an vm.EVMLogger which also holds an inner logger/tracer.
// When the TxEnd event happens, the inner tracer result is written to the file, and
// the file is closed.
type traceWriter struct {
inner vm.EVMLogger
f io.WriteCloser
}
// Compile-time interface check
var _ = vm.EVMLogger((*traceWriter)(nil))
func (t *traceWriter) CaptureTxEnd(restGas uint64) {
t.inner.CaptureTxEnd(restGas)
defer t.f.Close()
if tracer, ok := t.inner.(tracers.Tracer); ok {
result, err := tracer.GetResult()
if err != nil {
log.Warn("Error in tracer", "err", err)
return
}
err = json.NewEncoder(t.f).Encode(result)
if err != nil {
log.Warn("Error writing tracer output", "err", err)
return
}
}
}
func (t *traceWriter) CaptureTxStart(gasLimit uint64) { t.inner.CaptureTxStart(gasLimit) }
func (t *traceWriter) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
t.inner.CaptureStart(env, from, to, create, input, gas, value)
}
func (t *traceWriter) CaptureEnd(output []byte, gasUsed uint64, err error) {
t.inner.CaptureEnd(output, gasUsed, err)
}
func (t *traceWriter) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
t.inner.CaptureEnter(typ, from, to, input, gas, value)
}
func (t *traceWriter) CaptureExit(output []byte, gasUsed uint64, err error) {
t.inner.CaptureExit(output, gasUsed, err)
}
func (t *traceWriter) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
t.inner.CaptureState(pc, op, gas, cost, scope, rData, depth, err)
}
func (t *traceWriter) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
t.inner.CaptureFault(pc, op, gas, cost, scope, depth, err)
}

61
cmd/evm/internal/t8ntool/transition.go
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@ -31,6 +31,7 @@ import (
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers"
"github.com/ethereum/go-ethereum/eth/tracers/logger"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
@ -80,57 +81,43 @@ type input struct {
}
func Transition(ctx *cli.Context) error {
var (
err error
tracer vm.EVMLogger
)
var getTracer func(txIndex int, txHash common.Hash) (vm.EVMLogger, error)
var getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) { return nil, nil }
baseDir, err := createBasedir(ctx)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed creating output basedir: %v", err))
}
if ctx.Bool(TraceFlag.Name) {
if ctx.IsSet(TraceDisableMemoryFlag.Name) && ctx.IsSet(TraceEnableMemoryFlag.Name) {
return NewError(ErrorConfig, fmt.Errorf("can't use both flags --%s and --%s", TraceDisableMemoryFlag.Name, TraceEnableMemoryFlag.Name))
}
if ctx.IsSet(TraceDisableReturnDataFlag.Name) && ctx.IsSet(TraceEnableReturnDataFlag.Name) {
return NewError(ErrorConfig, fmt.Errorf("can't use both flags --%s and --%s", TraceDisableReturnDataFlag.Name, TraceEnableReturnDataFlag.Name))
}
if ctx.IsSet(TraceDisableMemoryFlag.Name) {
log.Warn(fmt.Sprintf("--%s has been deprecated in favour of --%s", TraceDisableMemoryFlag.Name, TraceEnableMemoryFlag.Name))
}
if ctx.IsSet(TraceDisableReturnDataFlag.Name) {
log.Warn(fmt.Sprintf("--%s has been deprecated in favour of --%s", TraceDisableReturnDataFlag.Name, TraceEnableReturnDataFlag.Name))
}
if ctx.Bool(TraceFlag.Name) { // JSON opcode tracing
// Configure the EVM logger
logConfig := &logger.Config{
DisableStack: ctx.Bool(TraceDisableStackFlag.Name),
EnableMemory: !ctx.Bool(TraceDisableMemoryFlag.Name) || ctx.Bool(TraceEnableMemoryFlag.Name),
EnableReturnData: !ctx.Bool(TraceDisableReturnDataFlag.Name) || ctx.Bool(TraceEnableReturnDataFlag.Name),
EnableMemory: ctx.Bool(TraceEnableMemoryFlag.Name),
EnableReturnData: ctx.Bool(TraceEnableReturnDataFlag.Name),
Debug: true,
}
var prevFile *os.File
// This one closes the last file
defer func() {
if prevFile != nil {
prevFile.Close()
}
}()
getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) {
if prevFile != nil {
prevFile.Close()
}
traceFile, err := os.Create(path.Join(baseDir, fmt.Sprintf("trace-%d-%v.jsonl", txIndex, txHash.String())))
if err != nil {
return nil, NewError(ErrorIO, fmt.Errorf("failed creating trace-file: %v", err))
}
prevFile = traceFile
return logger.NewJSONLogger(logConfig, traceFile), nil
return &traceWriter{logger.NewJSONLogger(logConfig, traceFile), traceFile}, nil
}
} else {
getTracer = func(txIndex int, txHash common.Hash) (tracer vm.EVMLogger, err error) {
return nil, nil
} else if ctx.IsSet(TraceTracerFlag.Name) {
var config json.RawMessage
if ctx.IsSet(TraceTracerConfigFlag.Name) {
config = []byte(ctx.String(TraceTracerConfigFlag.Name))
}
getTracer = func(txIndex int, txHash common.Hash) (vm.EVMLogger, error) {
traceFile, err := os.Create(path.Join(baseDir, fmt.Sprintf("trace-%d-%v.json", txIndex, txHash.String())))
if err != nil {
return nil, NewError(ErrorIO, fmt.Errorf("failed creating trace-file: %v", err))
}
tracer, err := tracers.DefaultDirectory.New(ctx.String(TraceTracerFlag.Name), nil, config)
if err != nil {
return nil, NewError(ErrorConfig, fmt.Errorf("failed instantiating tracer: %w", err))
}
return &traceWriter{tracer, traceFile}, nil
}
}
// We need to load three things: alloc, env and transactions. May be either in
@ -169,9 +156,7 @@ func Transition(ctx *cli.Context) error {
}
prestate.Env = *inputData.Env
vmConfig := vm.Config{
Tracer: tracer,
}
vmConfig := vm.Config{}
// Construct the chainconfig
var chainConfig *params.ChainConfig
if cConf, extraEips, err := tests.GetChainConfig(ctx.String(ForknameFlag.Name)); err != nil {

8
cmd/evm/main.go
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@ -26,6 +26,10 @@ import (
"github.com/ethereum/go-ethereum/internal/debug"
"github.com/ethereum/go-ethereum/internal/flags"
"github.com/urfave/cli/v2"
// Force-load the tracer engines to trigger registration
_ "github.com/ethereum/go-ethereum/eth/tracers/js"
_ "github.com/ethereum/go-ethereum/eth/tracers/native"
)
var (
@ -143,10 +147,10 @@ var stateTransitionCommand = &cli.Command{
Action: t8ntool.Transition,
Flags: []cli.Flag{
t8ntool.TraceFlag,
t8ntool.TraceDisableMemoryFlag,
t8ntool.TraceTracerFlag,
t8ntool.TraceTracerConfigFlag,
t8ntool.TraceEnableMemoryFlag,
t8ntool.TraceDisableStackFlag,
t8ntool.TraceDisableReturnDataFlag,
t8ntool.TraceEnableReturnDataFlag,
t8ntool.OutputBasedir,
t8ntool.OutputAllocFlag,