145 lines
4.4 KiB
Go
145 lines
4.4 KiB
Go
// Copyright 2022 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package native
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import (
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"encoding/json"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/tracers"
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)
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func init() {
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tracers.DefaultDirectory.Register("muxTracer", newMuxTracer, false)
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}
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// muxTracer is a go implementation of the Tracer interface which
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// runs multiple tracers in one go.
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type muxTracer struct {
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names []string
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tracers []tracers.Tracer
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}
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// newMuxTracer returns a new mux tracer.
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func newMuxTracer(ctx *tracers.Context, cfg json.RawMessage) (tracers.Tracer, error) {
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var config map[string]json.RawMessage
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if cfg != nil {
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if err := json.Unmarshal(cfg, &config); err != nil {
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return nil, err
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}
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}
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objects := make([]tracers.Tracer, 0, len(config))
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names := make([]string, 0, len(config))
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for k, v := range config {
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t, err := tracers.DefaultDirectory.New(k, ctx, v)
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if err != nil {
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return nil, err
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}
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objects = append(objects, t)
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names = append(names, k)
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}
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return &muxTracer{names: names, tracers: objects}, nil
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}
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// CaptureStart implements the EVMLogger interface to initialize the tracing operation.
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func (t *muxTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
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for _, t := range t.tracers {
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t.CaptureStart(env, from, to, create, input, gas, value)
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}
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}
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// CaptureEnd is called after the call finishes to finalize the tracing.
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func (t *muxTracer) CaptureEnd(output []byte, gasUsed uint64, err error) {
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for _, t := range t.tracers {
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t.CaptureEnd(output, gasUsed, err)
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}
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}
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// CaptureState implements the EVMLogger interface to trace a single step of VM execution.
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func (t *muxTracer) CaptureState(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
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for _, t := range t.tracers {
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t.CaptureState(pc, op, gas, cost, scope, rData, depth, err)
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}
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}
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// CaptureFault implements the EVMLogger interface to trace an execution fault.
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func (t *muxTracer) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
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for _, t := range t.tracers {
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t.CaptureFault(pc, op, gas, cost, scope, depth, err)
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}
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}
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// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
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func (t *muxTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
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for _, t := range t.tracers {
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t.CaptureEnter(typ, from, to, input, gas, value)
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}
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}
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// CaptureExit is called when EVM exits a scope, even if the scope didn't
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// execute any code.
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func (t *muxTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
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for _, t := range t.tracers {
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t.CaptureExit(output, gasUsed, err)
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}
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}
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func (t *muxTracer) CaptureTxStart(gasLimit uint64) {
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for _, t := range t.tracers {
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t.CaptureTxStart(gasLimit)
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}
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}
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func (t *muxTracer) CaptureTxEnd(restGas uint64) {
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for _, t := range t.tracers {
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t.CaptureTxEnd(restGas)
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}
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}
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func (t *muxTracer) CaptureSystemTxEnd(intrinsicGas uint64) {
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for _, t := range t.tracers {
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t.CaptureSystemTxEnd(intrinsicGas)
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}
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}
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// GetResult returns an empty json object.
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func (t *muxTracer) GetResult() (json.RawMessage, error) {
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resObject := make(map[string]json.RawMessage)
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for i, tt := range t.tracers {
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r, err := tt.GetResult()
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if err != nil {
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return nil, err
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}
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resObject[t.names[i]] = r
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}
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res, err := json.Marshal(resObject)
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if err != nil {
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return nil, err
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}
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return res, nil
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}
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// Stop terminates execution of the tracer at the first opportune moment.
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func (t *muxTracer) Stop(err error) {
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for _, t := range t.tracers {
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t.Stop(err)
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}
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}
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