467 lines
15 KiB
Go
467 lines
15 KiB
Go
// Copyright 2021 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 logger
|
|
|
|
import (
|
|
"encoding/hex"
|
|
"encoding/json"
|
|
"fmt"
|
|
"io"
|
|
"math/big"
|
|
"strings"
|
|
"sync/atomic"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/common/hexutil"
|
|
"github.com/ethereum/go-ethereum/common/math"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/core/vm"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
"github.com/holiman/uint256"
|
|
)
|
|
|
|
// Storage represents a contract's storage.
|
|
type Storage map[common.Hash]common.Hash
|
|
|
|
// Copy duplicates the current storage.
|
|
func (s Storage) Copy() Storage {
|
|
cpy := make(Storage, len(s))
|
|
for key, value := range s {
|
|
cpy[key] = value
|
|
}
|
|
return cpy
|
|
}
|
|
|
|
// Config are the configuration options for structured logger the EVM
|
|
type Config struct {
|
|
EnableMemory bool // enable memory capture
|
|
DisableStack bool // disable stack capture
|
|
DisableStorage bool // disable storage capture
|
|
EnableReturnData bool // enable return data capture
|
|
Debug bool // print output during capture end
|
|
Limit int // maximum length of output, but zero means unlimited
|
|
// Chain overrides, can be used to execute a trace using future fork rules
|
|
Overrides *params.ChainConfig `json:"overrides,omitempty"`
|
|
}
|
|
|
|
//go:generate go run github.com/fjl/gencodec -type StructLog -field-override structLogMarshaling -out gen_structlog.go
|
|
|
|
// StructLog is emitted to the EVM each cycle and lists information about the current internal state
|
|
// prior to the execution of the statement.
|
|
type StructLog struct {
|
|
Pc uint64 `json:"pc"`
|
|
Op vm.OpCode `json:"op"`
|
|
Gas uint64 `json:"gas"`
|
|
GasCost uint64 `json:"gasCost"`
|
|
Memory []byte `json:"memory,omitempty"`
|
|
MemorySize int `json:"memSize"`
|
|
Stack []uint256.Int `json:"stack"`
|
|
ReturnData []byte `json:"returnData,omitempty"`
|
|
Storage map[common.Hash]common.Hash `json:"-"`
|
|
Depth int `json:"depth"`
|
|
RefundCounter uint64 `json:"refund"`
|
|
Err error `json:"-"`
|
|
}
|
|
|
|
// overrides for gencodec
|
|
type structLogMarshaling struct {
|
|
Gas math.HexOrDecimal64
|
|
GasCost math.HexOrDecimal64
|
|
Memory hexutil.Bytes
|
|
ReturnData hexutil.Bytes
|
|
OpName string `json:"opName"` // adds call to OpName() in MarshalJSON
|
|
ErrorString string `json:"error,omitempty"` // adds call to ErrorString() in MarshalJSON
|
|
}
|
|
|
|
// OpName formats the operand name in a human-readable format.
|
|
func (s *StructLog) OpName() string {
|
|
return s.Op.String()
|
|
}
|
|
|
|
// ErrorString formats the log's error as a string.
|
|
func (s *StructLog) ErrorString() string {
|
|
if s.Err != nil {
|
|
return s.Err.Error()
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// StructLogger is an EVM state logger and implements EVMLogger.
|
|
//
|
|
// StructLogger can capture state based on the given Log configuration and also keeps
|
|
// a track record of modified storage which is used in reporting snapshots of the
|
|
// contract their storage.
|
|
type StructLogger struct {
|
|
cfg Config
|
|
env *vm.EVM
|
|
|
|
storage map[common.Address]Storage
|
|
logs []StructLog
|
|
output []byte
|
|
err error
|
|
gasLimit uint64
|
|
usedGas uint64
|
|
|
|
interrupt atomic.Bool // Atomic flag to signal execution interruption
|
|
reason error // Textual reason for the interruption
|
|
}
|
|
|
|
// NewStructLogger returns a new logger
|
|
func NewStructLogger(cfg *Config) *StructLogger {
|
|
logger := &StructLogger{
|
|
storage: make(map[common.Address]Storage),
|
|
}
|
|
if cfg != nil {
|
|
logger.cfg = *cfg
|
|
}
|
|
return logger
|
|
}
|
|
|
|
// Reset clears the data held by the logger.
|
|
func (l *StructLogger) Reset() {
|
|
l.storage = make(map[common.Address]Storage)
|
|
l.output = make([]byte, 0)
|
|
l.logs = l.logs[:0]
|
|
l.err = nil
|
|
}
|
|
|
|
// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
|
|
func (l *StructLogger) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
|
|
l.env = env
|
|
}
|
|
|
|
// CaptureState logs a new structured log message and pushes it out to the environment
|
|
//
|
|
// CaptureState also tracks SLOAD/SSTORE ops to track storage change.
|
|
func (l *StructLogger) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
|
|
// If tracing was interrupted, set the error and stop
|
|
if l.interrupt.Load() {
|
|
return
|
|
}
|
|
// check if already accumulated the specified number of logs
|
|
if l.cfg.Limit != 0 && l.cfg.Limit <= len(l.logs) {
|
|
return
|
|
}
|
|
|
|
memory := scope.Memory
|
|
stack := scope.Stack
|
|
contract := scope.Contract
|
|
// Copy a snapshot of the current memory state to a new buffer
|
|
var mem []byte
|
|
if l.cfg.EnableMemory {
|
|
mem = make([]byte, len(memory.Data()))
|
|
copy(mem, memory.Data())
|
|
}
|
|
// Copy a snapshot of the current stack state to a new buffer
|
|
var stck []uint256.Int
|
|
if !l.cfg.DisableStack {
|
|
stck = make([]uint256.Int, len(stack.Data()))
|
|
for i, item := range stack.Data() {
|
|
stck[i] = item
|
|
}
|
|
}
|
|
stackData := stack.Data()
|
|
stackLen := len(stackData)
|
|
// Copy a snapshot of the current storage to a new container
|
|
var storage Storage
|
|
if !l.cfg.DisableStorage && (op == vm.SLOAD || op == vm.SSTORE) {
|
|
// initialise new changed values storage container for this contract
|
|
// if not present.
|
|
if l.storage[contract.Address()] == nil {
|
|
l.storage[contract.Address()] = make(Storage)
|
|
}
|
|
// capture SLOAD opcodes and record the read entry in the local storage
|
|
if op == vm.SLOAD && stackLen >= 1 {
|
|
var (
|
|
address = common.Hash(stackData[stackLen-1].Bytes32())
|
|
value = l.env.StateDB.GetState(contract.Address(), address)
|
|
)
|
|
l.storage[contract.Address()][address] = value
|
|
storage = l.storage[contract.Address()].Copy()
|
|
} else if op == vm.SSTORE && stackLen >= 2 {
|
|
// capture SSTORE opcodes and record the written entry in the local storage.
|
|
var (
|
|
value = common.Hash(stackData[stackLen-2].Bytes32())
|
|
address = common.Hash(stackData[stackLen-1].Bytes32())
|
|
)
|
|
l.storage[contract.Address()][address] = value
|
|
storage = l.storage[contract.Address()].Copy()
|
|
}
|
|
}
|
|
var rdata []byte
|
|
if l.cfg.EnableReturnData {
|
|
rdata = make([]byte, len(rData))
|
|
copy(rdata, rData)
|
|
}
|
|
// create a new snapshot of the EVM.
|
|
log := StructLog{pc, op, gas, cost, mem, memory.Len(), stck, rdata, storage, depth, l.env.StateDB.GetRefund(), err}
|
|
l.logs = append(l.logs, log)
|
|
}
|
|
|
|
// CaptureFault implements the EVMLogger interface to trace an execution fault
|
|
// while running an opcode.
|
|
func (l *StructLogger) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
|
|
}
|
|
|
|
// CaptureEnd is called after the call finishes to finalize the tracing.
|
|
func (l *StructLogger) CaptureEnd(output []byte, gasUsed uint64, err error) {
|
|
l.output = output
|
|
l.err = err
|
|
if l.cfg.Debug {
|
|
fmt.Printf("%#x\n", output)
|
|
if err != nil {
|
|
fmt.Printf(" error: %v\n", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (l *StructLogger) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
|
|
}
|
|
|
|
func (l *StructLogger) CaptureExit(output []byte, gasUsed uint64, err error) {
|
|
}
|
|
|
|
func (l *StructLogger) GetResult() (json.RawMessage, error) {
|
|
// Tracing aborted
|
|
if l.reason != nil {
|
|
return nil, l.reason
|
|
}
|
|
failed := l.err != nil
|
|
returnData := common.CopyBytes(l.output)
|
|
// Return data when successful and revert reason when reverted, otherwise empty.
|
|
returnVal := fmt.Sprintf("%x", returnData)
|
|
if failed && l.err != vm.ErrExecutionReverted {
|
|
returnVal = ""
|
|
}
|
|
return json.Marshal(&ExecutionResult{
|
|
Gas: l.usedGas,
|
|
Failed: failed,
|
|
ReturnValue: returnVal,
|
|
StructLogs: formatLogs(l.StructLogs()),
|
|
})
|
|
}
|
|
|
|
// Stop terminates execution of the tracer at the first opportune moment.
|
|
func (l *StructLogger) Stop(err error) {
|
|
l.reason = err
|
|
l.interrupt.Store(true)
|
|
}
|
|
|
|
func (l *StructLogger) CaptureTxStart(gasLimit uint64) {
|
|
l.gasLimit = gasLimit
|
|
}
|
|
|
|
func (l *StructLogger) CaptureTxEnd(restGas uint64) {
|
|
l.usedGas = l.gasLimit - restGas
|
|
}
|
|
|
|
// StructLogs returns the captured log entries.
|
|
func (l *StructLogger) StructLogs() []StructLog { return l.logs }
|
|
|
|
// Error returns the VM error captured by the trace.
|
|
func (l *StructLogger) Error() error { return l.err }
|
|
|
|
// Output returns the VM return value captured by the trace.
|
|
func (l *StructLogger) Output() []byte { return l.output }
|
|
|
|
// WriteTrace writes a formatted trace to the given writer
|
|
func WriteTrace(writer io.Writer, logs []StructLog) {
|
|
for _, log := range logs {
|
|
fmt.Fprintf(writer, "%-16spc=%08d gas=%v cost=%v", log.Op, log.Pc, log.Gas, log.GasCost)
|
|
if log.Err != nil {
|
|
fmt.Fprintf(writer, " ERROR: %v", log.Err)
|
|
}
|
|
fmt.Fprintln(writer)
|
|
|
|
if len(log.Stack) > 0 {
|
|
fmt.Fprintln(writer, "Stack:")
|
|
for i := len(log.Stack) - 1; i >= 0; i-- {
|
|
fmt.Fprintf(writer, "%08d %s\n", len(log.Stack)-i-1, log.Stack[i].Hex())
|
|
}
|
|
}
|
|
if len(log.Memory) > 0 {
|
|
fmt.Fprintln(writer, "Memory:")
|
|
fmt.Fprint(writer, hex.Dump(log.Memory))
|
|
}
|
|
if len(log.Storage) > 0 {
|
|
fmt.Fprintln(writer, "Storage:")
|
|
for h, item := range log.Storage {
|
|
fmt.Fprintf(writer, "%x: %x\n", h, item)
|
|
}
|
|
}
|
|
if len(log.ReturnData) > 0 {
|
|
fmt.Fprintln(writer, "ReturnData:")
|
|
fmt.Fprint(writer, hex.Dump(log.ReturnData))
|
|
}
|
|
fmt.Fprintln(writer)
|
|
}
|
|
}
|
|
|
|
// WriteLogs writes vm logs in a readable format to the given writer
|
|
func WriteLogs(writer io.Writer, logs []*types.Log) {
|
|
for _, log := range logs {
|
|
fmt.Fprintf(writer, "LOG%d: %x bn=%d txi=%x\n", len(log.Topics), log.Address, log.BlockNumber, log.TxIndex)
|
|
|
|
for i, topic := range log.Topics {
|
|
fmt.Fprintf(writer, "%08d %x\n", i, topic)
|
|
}
|
|
|
|
fmt.Fprint(writer, hex.Dump(log.Data))
|
|
fmt.Fprintln(writer)
|
|
}
|
|
}
|
|
|
|
type mdLogger struct {
|
|
out io.Writer
|
|
cfg *Config
|
|
env *vm.EVM
|
|
}
|
|
|
|
// NewMarkdownLogger creates a logger which outputs information in a format adapted
|
|
// for human readability, and is also a valid markdown table
|
|
func NewMarkdownLogger(cfg *Config, writer io.Writer) *mdLogger {
|
|
l := &mdLogger{out: writer, cfg: cfg}
|
|
if l.cfg == nil {
|
|
l.cfg = &Config{}
|
|
}
|
|
return l
|
|
}
|
|
|
|
func (t *mdLogger) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
|
|
t.env = env
|
|
if !create {
|
|
fmt.Fprintf(t.out, "From: `%v`\nTo: `%v`\nData: `%#x`\nGas: `%d`\nValue `%v` wei\n",
|
|
from.String(), to.String(),
|
|
input, gas, value)
|
|
} else {
|
|
fmt.Fprintf(t.out, "From: `%v`\nCreate at: `%v`\nData: `%#x`\nGas: `%d`\nValue `%v` wei\n",
|
|
from.String(), to.String(),
|
|
input, gas, value)
|
|
}
|
|
|
|
fmt.Fprintf(t.out, `
|
|
| Pc | Op | Cost | Stack | RStack | Refund |
|
|
|-------|-------------|------|-----------|-----------|---------|
|
|
`)
|
|
}
|
|
|
|
// CaptureState also tracks SLOAD/SSTORE ops to track storage change.
|
|
func (t *mdLogger) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
|
|
stack := scope.Stack
|
|
fmt.Fprintf(t.out, "| %4d | %10v | %3d |", pc, op, cost)
|
|
|
|
if !t.cfg.DisableStack {
|
|
// format stack
|
|
var a []string
|
|
for _, elem := range stack.Data() {
|
|
a = append(a, elem.Hex())
|
|
}
|
|
b := fmt.Sprintf("[%v]", strings.Join(a, ","))
|
|
fmt.Fprintf(t.out, "%10v |", b)
|
|
}
|
|
fmt.Fprintf(t.out, "%10v |", t.env.StateDB.GetRefund())
|
|
fmt.Fprintln(t.out, "")
|
|
if err != nil {
|
|
fmt.Fprintf(t.out, "Error: %v\n", err)
|
|
}
|
|
}
|
|
|
|
func (t *mdLogger) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
|
|
fmt.Fprintf(t.out, "\nError: at pc=%d, op=%v: %v\n", pc, op, err)
|
|
}
|
|
|
|
func (t *mdLogger) CaptureEnd(output []byte, gasUsed uint64, err error) {
|
|
fmt.Fprintf(t.out, "\nOutput: `%#x`\nConsumed gas: `%d`\nError: `%v`\n",
|
|
output, gasUsed, err)
|
|
}
|
|
|
|
func (t *mdLogger) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
|
|
}
|
|
|
|
func (t *mdLogger) CaptureExit(output []byte, gasUsed uint64, err error) {}
|
|
|
|
func (*mdLogger) CaptureTxStart(gasLimit uint64) {}
|
|
|
|
func (*mdLogger) CaptureTxEnd(restGas uint64) {}
|
|
|
|
// ExecutionResult groups all structured logs emitted by the EVM
|
|
// while replaying a transaction in debug mode as well as transaction
|
|
// execution status, the amount of gas used and the return value
|
|
type ExecutionResult struct {
|
|
Gas uint64 `json:"gas"`
|
|
Failed bool `json:"failed"`
|
|
ReturnValue string `json:"returnValue"`
|
|
StructLogs []StructLogRes `json:"structLogs"`
|
|
}
|
|
|
|
// StructLogRes stores a structured log emitted by the EVM while replaying a
|
|
// transaction in debug mode
|
|
type StructLogRes struct {
|
|
Pc uint64 `json:"pc"`
|
|
Op string `json:"op"`
|
|
Gas uint64 `json:"gas"`
|
|
GasCost uint64 `json:"gasCost"`
|
|
Depth int `json:"depth"`
|
|
Error string `json:"error,omitempty"`
|
|
Stack *[]string `json:"stack,omitempty"`
|
|
ReturnData string `json:"returnData,omitempty"`
|
|
Memory *[]string `json:"memory,omitempty"`
|
|
Storage *map[string]string `json:"storage,omitempty"`
|
|
RefundCounter uint64 `json:"refund,omitempty"`
|
|
}
|
|
|
|
// formatLogs formats EVM returned structured logs for json output
|
|
func formatLogs(logs []StructLog) []StructLogRes {
|
|
formatted := make([]StructLogRes, len(logs))
|
|
for index, trace := range logs {
|
|
formatted[index] = StructLogRes{
|
|
Pc: trace.Pc,
|
|
Op: trace.Op.String(),
|
|
Gas: trace.Gas,
|
|
GasCost: trace.GasCost,
|
|
Depth: trace.Depth,
|
|
Error: trace.ErrorString(),
|
|
RefundCounter: trace.RefundCounter,
|
|
}
|
|
if trace.Stack != nil {
|
|
stack := make([]string, len(trace.Stack))
|
|
for i, stackValue := range trace.Stack {
|
|
stack[i] = stackValue.Hex()
|
|
}
|
|
formatted[index].Stack = &stack
|
|
}
|
|
if trace.ReturnData != nil && len(trace.ReturnData) > 0 {
|
|
formatted[index].ReturnData = hexutil.Bytes(trace.ReturnData).String()
|
|
}
|
|
if trace.Memory != nil {
|
|
memory := make([]string, 0, (len(trace.Memory)+31)/32)
|
|
for i := 0; i+32 <= len(trace.Memory); i += 32 {
|
|
memory = append(memory, fmt.Sprintf("%x", trace.Memory[i:i+32]))
|
|
}
|
|
formatted[index].Memory = &memory
|
|
}
|
|
if trace.Storage != nil {
|
|
storage := make(map[string]string)
|
|
for i, storageValue := range trace.Storage {
|
|
storage[fmt.Sprintf("%x", i)] = fmt.Sprintf("%x", storageValue)
|
|
}
|
|
formatted[index].Storage = &storage
|
|
}
|
|
}
|
|
return formatted
|
|
}
|