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core/evm, core/vm: improved evm trace output

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* Improved the standard evm tracer output and renamed it to WriteTrace
which now takes an io.Writer to write the logs to.
* Added WriteLogs which writes logs to the given writer in a readable
format.
* evm utility now also prints logs generated during the execution.
This commit is contained in:
Jeffrey Wilcke
2017-03-01 10:19:15 +01:00
parent 230cf2ec91
commit bf4155846c
2 changed files with 49 additions and 42 deletions
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40
core/vm/logger.go
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@ -19,11 +19,12 @@ package vm
import (
"encoding/hex"
"fmt"
"io"
"math/big"
"os"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/core/types"
)
type Storage map[common.Hash]common.Hash
@ -168,29 +169,38 @@ func (l *StructLogger) StructLogs() []StructLog {
return l.logs
}
// StdErrFormat formats a slice of StructLogs to human readable format
func StdErrFormat(logs []StructLog) {
fmt.Fprintf(os.Stderr, "VM STAT %d OPs\n", len(logs))
// WriteTrace writes a formatted trace to the given writer
func WriteTrace(writer io.Writer, logs []StructLog) {
for _, log := range logs {
fmt.Fprintf(os.Stderr, "PC %08d: %s GAS: %v COST: %v", log.Pc, log.Op, log.Gas, log.GasCost)
fmt.Fprintf(writer, "%-10spc=%08d gas=%v cost=%v", log.Op, log.Pc, log.Gas, log.GasCost)
if log.Err != nil {
fmt.Fprintf(os.Stderr, " ERROR: %v", log.Err)
fmt.Fprintf(writer, " ERROR: %v", log.Err)
}
fmt.Fprintf(os.Stderr, "\n")
fmt.Fprintln(os.Stderr, "STACK =", len(log.Stack))
fmt.Fprintf(writer, "\n")
for i := len(log.Stack) - 1; i >= 0; i-- {
fmt.Fprintf(os.Stderr, "%04d: %x\n", len(log.Stack)-i-1, math.PaddedBigBytes(log.Stack[i], 32))
fmt.Fprintf(writer, "%08d %x\n", len(log.Stack)-i-1, math.PaddedBigBytes(log.Stack[i], 32))
}
fmt.Fprintln(os.Stderr, "MEM =", len(log.Memory))
fmt.Fprintln(os.Stderr, hex.Dump(log.Memory))
fmt.Fprint(writer, hex.Dump(log.Memory))
fmt.Fprintln(os.Stderr, "STORAGE =", len(log.Storage))
for h, item := range log.Storage {
fmt.Fprintf(os.Stderr, "%x: %x\n", h, item)
fmt.Fprintf(writer, "%x: %x\n", h, item)
}
fmt.Fprintln(os.Stderr)
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)
}
}