laconicd/rpc/ethereum/namespaces/debug/api.go
Tomas Tauber 8e12d94359
rpc: fix ExpandHome restrictions bypass (#667)
`go-home` seems to be using environment variables first
2021-10-13 10:52:05 +00:00

390 lines
12 KiB
Go

package debug
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"os"
"runtime"
"runtime/debug"
"runtime/pprof"
"sync"
"time"
"github.com/tendermint/tendermint/types"
evmtypes "github.com/tharsis/ethermint/x/evm/types"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/server"
"github.com/ethereum/go-ethereum/common"
"github.com/tendermint/tendermint/libs/log"
"github.com/tharsis/ethermint/rpc/ethereum/backend"
rpctypes "github.com/tharsis/ethermint/rpc/ethereum/types"
)
// HandlerT keeps track of the cpu profiler and trace execution
type HandlerT struct {
cpuFilename string
cpuFile io.WriteCloser
mu sync.Mutex
traceFilename string
traceFile io.WriteCloser
}
// API is the collection of tracing APIs exposed over the private debugging endpoint.
type API struct {
ctx *server.Context
logger log.Logger
backend backend.Backend
clientCtx client.Context
queryClient *rpctypes.QueryClient
handler *HandlerT
}
// NewAPI creates a new API definition for the tracing methods of the Ethereum service.
func NewAPI(
ctx *server.Context,
backend backend.Backend,
clientCtx client.Context,
) *API {
return &API{
ctx: ctx,
logger: ctx.Logger.With("module", "debug"),
backend: backend,
clientCtx: clientCtx,
queryClient: rpctypes.NewQueryClient(clientCtx),
handler: new(HandlerT),
}
}
// TraceTransaction returns the structured logs created during the execution of EVM
// and returns them as a JSON object.
func (a *API) TraceTransaction(hash common.Hash, config *evmtypes.TraceConfig) (interface{}, error) {
a.logger.Debug("debug_traceTransaction", "hash", hash)
// Get transaction by hash
transaction, err := a.backend.GetTxByEthHash(hash)
if err != nil {
a.logger.Debug("tx not found", "hash", hash)
return nil, err
}
// check if block number is 0
if transaction.Height == 0 {
return nil, errors.New("genesis is not traceable")
}
tx, err := a.clientCtx.TxConfig.TxDecoder()(transaction.Tx)
if err != nil {
a.logger.Debug("tx not found", "hash", hash)
return nil, err
}
ethMessage, ok := tx.GetMsgs()[0].(*evmtypes.MsgEthereumTx)
if !ok {
a.logger.Debug("invalid transaction type", "type", fmt.Sprintf("%T", tx))
return nil, fmt.Errorf("invalid transaction type %T", tx)
}
traceTxRequest := evmtypes.QueryTraceTxRequest{
Msg: ethMessage,
TxIndex: uint64(transaction.Index),
}
if config != nil {
traceTxRequest.TraceConfig = config
}
traceResult, err := a.queryClient.TraceTx(rpctypes.ContextWithHeight(transaction.Height), &traceTxRequest)
if err != nil {
return nil, err
}
// Response format is unknown due to custom tracer config param
// More information can be found here https://geth.ethereum.org/docs/dapp/tracing-filtered
var decodedResult interface{}
err = json.Unmarshal(traceResult.Data, &decodedResult)
if err != nil {
return nil, err
}
return decodedResult, nil
}
// TraceBlockByNumber returns the structured logs created during the execution of
// EVM and returns them as a JSON object.
func (a *API) TraceBlockByNumber(height rpctypes.BlockNumber, config *evmtypes.TraceConfig) ([]*evmtypes.TxTraceResult, error) {
a.logger.Debug("debug_traceBlockByNumber", "height", height)
if height == 0 {
return nil, errors.New("genesis is not traceable")
}
// Get Tendermint Block
resBlock, err := a.backend.GetTendermintBlockByNumber(height)
if err != nil {
return nil, err
}
return a.traceBlock(height, config, resBlock.Block.Txs)
}
// traceBlock configures a new tracer according to the provided configuration, and
// executes all the transactions contained within. The return value will be one item
// per transaction, dependent on the requested tracer.
func (a API) traceBlock(height rpctypes.BlockNumber, config *evmtypes.TraceConfig, txs types.Txs) ([]*evmtypes.TxTraceResult, error) {
txsLength := len(txs)
if txsLength == 0 {
// If there are no transactions return empty array
return []*evmtypes.TxTraceResult{}, nil
}
var (
results = make([]*evmtypes.TxTraceResult, txsLength)
wg = new(sync.WaitGroup)
jobs = make(chan *evmtypes.TxTraceTask, txsLength)
)
threads := runtime.NumCPU()
if threads > txsLength {
threads = txsLength
}
ctxWithHeight := rpctypes.ContextWithHeight(int64(height))
wg.Add(threads)
for th := 0; th < threads; th++ {
go func() {
defer wg.Done()
txDecoder := a.clientCtx.TxConfig.TxDecoder()
// Fetch and execute the next transaction trace tasks
for task := range jobs {
tx, err := txDecoder(txs[task.Index])
if err != nil {
a.logger.Error("failed to decode transaction", "hash", txs[task.Index].Hash(), "error", err.Error())
continue
}
messages := tx.GetMsgs()
if len(messages) == 0 {
continue
}
ethMessage, ok := messages[0].(*evmtypes.MsgEthereumTx)
if !ok {
// Just considers Ethereum transactions
continue
}
traceTxRequest := &evmtypes.QueryTraceTxRequest{
Msg: ethMessage,
TxIndex: uint64(task.Index),
TraceConfig: config,
}
res, err := a.queryClient.TraceTx(ctxWithHeight, traceTxRequest)
if err != nil {
results[task.Index] = &evmtypes.TxTraceResult{Error: err.Error()}
continue
}
// Response format is unknown due to custom tracer config param
// More information can be found here https://geth.ethereum.org/docs/dapp/tracing-filtered
var decodedResult interface{}
if err := json.Unmarshal(res.Data, &decodedResult); err != nil {
results[task.Index] = &evmtypes.TxTraceResult{Error: err.Error()}
continue
}
results[task.Index] = &evmtypes.TxTraceResult{Result: decodedResult}
}
}()
}
for i := range txs {
jobs <- &evmtypes.TxTraceTask{Index: i}
}
close(jobs)
wg.Wait()
return results, nil
}
// BlockProfile turns on goroutine profiling for nsec seconds and writes profile data to
// file. It uses a profile rate of 1 for most accurate information. If a different rate is
// desired, set the rate and write the profile manually.
func (a *API) BlockProfile(file string, nsec uint) error {
a.logger.Debug("debug_blockProfile", "file", file, "nsec", nsec)
runtime.SetBlockProfileRate(1)
defer runtime.SetBlockProfileRate(0)
time.Sleep(time.Duration(nsec) * time.Second)
return writeProfile("block", file, a.logger)
}
// CpuProfile turns on CPU profiling for nsec seconds and writes
// profile data to file.
func (a *API) CpuProfile(file string, nsec uint) error { // nolint: golint, stylecheck
a.logger.Debug("debug_cpuProfile", "file", file, "nsec", nsec)
if err := a.StartCPUProfile(file); err != nil {
return err
}
time.Sleep(time.Duration(nsec) * time.Second)
return a.StopCPUProfile()
}
// GcStats returns GC statistics.
func (a *API) GcStats() *debug.GCStats {
a.logger.Debug("debug_gcStats")
s := new(debug.GCStats)
debug.ReadGCStats(s)
return s
}
// GoTrace turns on tracing for nsec seconds and writes
// trace data to file.
func (a *API) GoTrace(file string, nsec uint) error {
a.logger.Debug("debug_goTrace", "file", file, "nsec", nsec)
if err := a.StartGoTrace(file); err != nil {
return err
}
time.Sleep(time.Duration(nsec) * time.Second)
return a.StopGoTrace()
}
// MemStats returns detailed runtime memory statistics.
func (a *API) MemStats() *runtime.MemStats {
a.logger.Debug("debug_memStats")
s := new(runtime.MemStats)
runtime.ReadMemStats(s)
return s
}
// SetBlockProfileRate sets the rate of goroutine block profile data collection.
// rate 0 disables block profiling.
func (a *API) SetBlockProfileRate(rate int) {
a.logger.Debug("debug_setBlockProfileRate", "rate", rate)
runtime.SetBlockProfileRate(rate)
}
// Stacks returns a printed representation of the stacks of all goroutines.
func (a *API) Stacks() string {
a.logger.Debug("debug_stacks")
buf := new(bytes.Buffer)
err := pprof.Lookup("goroutine").WriteTo(buf, 2)
if err != nil {
a.logger.Error("Failed to create stacks", "error", err.Error())
}
return buf.String()
}
// StartCPUProfile turns on CPU profiling, writing to the given file.
func (a *API) StartCPUProfile(file string) error {
a.logger.Debug("debug_startCPUProfile", "file", file)
a.handler.mu.Lock()
defer a.handler.mu.Unlock()
switch {
case isCPUProfileConfigurationActivated(a.ctx):
a.logger.Debug("CPU profiling already in progress using the configuration file")
return errors.New("CPU profiling already in progress using the configuration file")
case a.handler.cpuFile != nil:
a.logger.Debug("CPU profiling already in progress")
return errors.New("CPU profiling already in progress")
default:
fp, err := ExpandHome(file)
if err != nil {
a.logger.Debug("failed to get filepath for the CPU profile file", "error", err.Error())
return err
}
f, err := os.Create(fp)
if err != nil {
a.logger.Debug("failed to create CPU profile file", "error", err.Error())
return err
}
if err := pprof.StartCPUProfile(f); err != nil {
a.logger.Debug("cpu profiling already in use", "error", err.Error())
f.Close()
return err
}
a.logger.Info("CPU profiling started", "profile", file)
a.handler.cpuFile = f
a.handler.cpuFilename = file
return nil
}
}
// StopCPUProfile stops an ongoing CPU profile.
func (a *API) StopCPUProfile() error {
a.logger.Debug("debug_stopCPUProfile")
a.handler.mu.Lock()
defer a.handler.mu.Unlock()
switch {
case isCPUProfileConfigurationActivated(a.ctx):
a.logger.Debug("CPU profiling already in progress using the configuration file")
return errors.New("CPU profiling already in progress using the configuration file")
case a.handler.cpuFile != nil:
a.logger.Info("Done writing CPU profile", "profile", a.handler.cpuFilename)
pprof.StopCPUProfile()
a.handler.cpuFile.Close()
a.handler.cpuFile = nil
a.handler.cpuFilename = ""
return nil
default:
a.logger.Debug("CPU profiling not in progress")
return errors.New("CPU profiling not in progress")
}
}
// WriteBlockProfile writes a goroutine blocking profile to the given file.
func (a *API) WriteBlockProfile(file string) error {
a.logger.Debug("debug_writeBlockProfile", "file", file)
return writeProfile("block", file, a.logger)
}
// WriteMemProfile writes an allocation profile to the given file.
// Note that the profiling rate cannot be set through the API,
// it must be set on the command line.
func (a *API) WriteMemProfile(file string) error {
a.logger.Debug("debug_writeMemProfile", "file", file)
return writeProfile("heap", file, a.logger)
}
// MutexProfile turns on mutex profiling for nsec seconds and writes profile data to file.
// It uses a profile rate of 1 for most accurate information. If a different rate is
// desired, set the rate and write the profile manually.
func (a *API) MutexProfile(file string, nsec uint) error {
a.logger.Debug("debug_mutexProfile", "file", file, "nsec", nsec)
runtime.SetMutexProfileFraction(1)
time.Sleep(time.Duration(nsec) * time.Second)
defer runtime.SetMutexProfileFraction(0)
return writeProfile("mutex", file, a.logger)
}
// SetMutexProfileFraction sets the rate of mutex profiling.
func (a *API) SetMutexProfileFraction(rate int) {
a.logger.Debug("debug_setMutexProfileFraction", "rate", rate)
runtime.SetMutexProfileFraction(rate)
}
// WriteMutexProfile writes a goroutine blocking profile to the given file.
func (a *API) WriteMutexProfile(file string) error {
a.logger.Debug("debug_writeMutexProfile", "file", file)
return writeProfile("mutex", file, a.logger)
}
// FreeOSMemory forces a garbage collection.
func (a *API) FreeOSMemory() {
a.logger.Debug("debug_freeOSMemory")
debug.FreeOSMemory()
}
// SetGCPercent sets the garbage collection target percentage. It returns the previous
// setting. A negative value disables GC.
func (a *API) SetGCPercent(v int) int {
a.logger.Debug("debug_setGCPercent", "percent", v)
return debug.SetGCPercent(v)
}