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eth/tracers: make jstracer non-exported, avoid cast

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This commit is contained in:
Martin Holst Swende
2021-11-03 20:54:48 +01:00
parent 91a7c094b5
commit 2a69a3707e
2 changed files with 28 additions and 29 deletions
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29
eth/tracers/api.go
View File

@ -850,7 +850,9 @@ func (api *API) traceTx(ctx context.Context, message core.Message, txctx *Contex
txContext = core.NewEVMTxContext(message)
)
switch {
case config != nil && config.Tracer != nil:
case config == nil:
tracer = vm.NewStructLogger(nil)
case config.Tracer != nil:
// Define a meaningful timeout of a single transaction trace
timeout := defaultTraceTimeout
if config.Timeout != nil {
@ -858,22 +860,19 @@ func (api *API) traceTx(ctx context.Context, message core.Message, txctx *Contex
return nil, err
}
}
// Native tracers take precedence
if tracer, err = New(*config.Tracer, txctx); err != nil {
if t, err := New(*config.Tracer, txctx); err != nil {
return nil, err
} else {
deadlineCtx, cancel := context.WithTimeout(ctx, timeout)
go func() {
<-deadlineCtx.Done()
if errors.Is(deadlineCtx.Err(), context.DeadlineExceeded) {
t.Stop(errors.New("execution timeout"))
}
}()
defer cancel()
tracer = t
}
deadlineCtx, cancel := context.WithTimeout(ctx, timeout)
go func() {
<-deadlineCtx.Done()
if deadlineCtx.Err() == context.DeadlineExceeded {
tracer.(Tracer).Stop(errors.New("execution timeout"))
}
}()
defer cancel()
case config == nil:
tracer = vm.NewStructLogger(nil)
default:
tracer = vm.NewStructLogger(config.LogConfig)
}

28
eth/tracers/tracer.go
View File

@ -363,9 +363,9 @@ func (r *frameResult) pushObject(vm *duktape.Context) {
vm.PutPropString(obj, "getError")
}
// Tracer provides an implementation of Tracer that evaluates a Javascript
// jsTracer provides an implementation of Tracer that evaluates a Javascript
// function for each VM execution step.
type JSTracer struct {
type jsTracer struct {
vm *duktape.Context // Javascript VM instance
tracerObject int // Stack index of the tracer JavaScript object
@ -409,8 +409,8 @@ type Context struct {
// New instantiates a new tracer instance. code specifies a Javascript snippet,
// which must evaluate to an expression returning an object with 'step', 'fault'
// and 'result' functions.
func newJsTracer(code string, ctx *Context) (*JSTracer, error) {
tracer := &JSTracer{
func newJsTracer(code string, ctx *Context) (*jsTracer, error) {
tracer := &jsTracer{
vm: duktape.New(),
ctx: make(map[string]interface{}),
opWrapper: new(opWrapper),
@ -623,14 +623,14 @@ func newJsTracer(code string, ctx *Context) (*JSTracer, error) {
}
// Stop terminates execution of the tracer at the first opportune moment.
func (jst *JSTracer) Stop(err error) {
func (jst *jsTracer) Stop(err error) {
jst.reason = err
atomic.StoreUint32(&jst.interrupt, 1)
}
// call executes a method on a JS object, catching any errors, formatting and
// returning them as error objects.
func (jst *JSTracer) call(noret bool, method string, args ...string) (json.RawMessage, error) {
func (jst *jsTracer) call(noret bool, method string, args ...string) (json.RawMessage, error) {
// Execute the JavaScript call and return any error
jst.vm.PushString(method)
for _, arg := range args {
@ -666,7 +666,7 @@ func wrapError(context string, err error) error {
}
// CaptureStart implements the Tracer interface to initialize the tracing operation.
func (jst *JSTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
func (jst *jsTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
jst.ctx["type"] = "CALL"
if create {
jst.ctx["type"] = "CREATE"
@ -696,7 +696,7 @@ func (jst *JSTracer) CaptureStart(env *vm.EVM, from common.Address, to common.Ad
}
// CaptureState implements the Tracer interface to trace a single step of VM execution.
func (jst *JSTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
func (jst *jsTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
if !jst.traceSteps {
return
}
@ -732,7 +732,7 @@ func (jst *JSTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cos
}
// CaptureFault implements the Tracer interface to trace an execution fault
func (jst *JSTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
func (jst *jsTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
if jst.err != nil {
return
}
@ -746,7 +746,7 @@ func (jst *JSTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cos
}
// CaptureEnd is called after the call finishes to finalize the tracing.
func (jst *JSTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {
func (jst *jsTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {
jst.ctx["output"] = output
jst.ctx["time"] = t.String()
jst.ctx["gasUsed"] = gasUsed
@ -757,7 +757,7 @@ func (jst *JSTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration,
}
// CaptureEnter is called when EVM enters a new scope (via call, create or selfdestruct).
func (jst *JSTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
func (jst *jsTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.Address, input []byte, gas uint64, value *big.Int) {
if !jst.traceCallFrames {
return
}
@ -787,7 +787,7 @@ func (jst *JSTracer) CaptureEnter(typ vm.OpCode, from common.Address, to common.
// CaptureExit is called when EVM exits a scope, even if the scope didn't
// execute any code.
func (jst *JSTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
func (jst *jsTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
if !jst.traceCallFrames {
return
}
@ -811,7 +811,7 @@ func (jst *JSTracer) CaptureExit(output []byte, gasUsed uint64, err error) {
}
// GetResult calls the Javascript 'result' function and returns its value, or any accumulated error
func (jst *JSTracer) GetResult() (json.RawMessage, error) {
func (jst *jsTracer) GetResult() (json.RawMessage, error) {
// Transform the context into a JavaScript object and inject into the state
obj := jst.vm.PushObject()
@ -833,7 +833,7 @@ func (jst *JSTracer) GetResult() (json.RawMessage, error) {
}
// addToObj pushes a field to a JS object.
func (jst *JSTracer) addToObj(obj int, key string, val interface{}) {
func (jst *jsTracer) addToObj(obj int, key string, val interface{}) {
pushValue(jst.vm, val)
jst.vm.PutPropString(obj, key)
}