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eth/tracers: support for golang tracers + add golang callTracer (#23708)

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* eth/tracers: add basic native loader

* eth/tracers: add GetResult to tracer interface

* eth/tracers: add native call tracer

* eth/tracers: fix call tracer json result

* eth/tracers: minor fix

* eth/tracers: fix

* eth/tracers: fix benchTracer

* eth/tracers: test native call tracer

* eth/tracers: fix

* eth/tracers: rm extra make

Co-authored-by: Martin Holst Swende <martin@swende.se>

* eth/tracers: rm extra make

* eth/tracers: make callFrame private

* eth/tracers: clean-up and comments

* eth/tracers: add license

* eth/tracers: rework the model a bit

* eth/tracers: move tracecall tests to subpackage

* cmd/geth: load native tracers

* eth/tracers: minor fix

* eth/tracers: impl stop

* eth/tracers: add native noop tracer

* renamings

Co-authored-by: Martin Holst Swende <martin@swende.se>

* eth/tracers: more renamings

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

* eth/tracers, core/vm: rename vm.Tracer to vm.EVMLogger for clarity

* eth/tracers: minor comment fix

* eth/tracers/testing: lint nitpicks

* core,eth: cancel evm on nativecalltracer stop

* Revert "core,eth: cancel evm on nativecalltracer stop"

This reverts commit 01bb908790.

* eth/tracers: linter nits

* eth/tracers: fix output on err

Co-authored-by: Martin Holst Swende <martin@swende.se>
This commit is contained in:
Sina Mahmoodi
2021-11-05 11:48:21 +01:00
committed by GitHub
parent 3bbeb94c1c
commit 8d7e6062ec
15 changed files with 560 additions and 250 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
eth/tracers/tracers.go
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@ -18,14 +18,53 @@
package tracers
import (
"encoding/json"
"strings"
"unicode"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/tracers/internal/tracers"
)
// all contains all the built in JavaScript tracers by name.
var all = make(map[string]string)
// Tracer interface extends vm.EVMLogger and additionally
// allows collecting the tracing result.
type Tracer interface {
vm.EVMLogger
GetResult() (json.RawMessage, error)
// Stop terminates execution of the tracer at the first opportune moment.
Stop(err error)
}
var (
nativeTracers map[string]func() Tracer = make(map[string]func() Tracer)
jsTracers = make(map[string]string)
)
// RegisterNativeTracer makes native tracers which adhere
// to the `Tracer` interface available to the rest of the codebase.
// It is typically invoked in the `init()` function, e.g. see the `native/call.go`.
func RegisterNativeTracer(name string, ctor func() Tracer) {
nativeTracers[name] = ctor
}
// New returns a new instance of a tracer,
// 1. If 'code' is the name of a registered native tracer, then that tracer
// is instantiated and returned
// 2. If 'code' is the name of a registered js-tracer, then that tracer is
// instantiated and returned
// 3. Otherwise, the code is interpreted as the js code of a js-tracer, and
// is evaluated and returned.
func New(code string, ctx *Context) (Tracer, error) {
// Resolve native tracer
if fn, ok := nativeTracers[code]; ok {
return fn(), nil
}
// Resolve js-tracers by name and assemble the tracer object
if tracer, ok := jsTracers[code]; ok {
code = tracer
}
return newJsTracer(code, ctx)
}
// camel converts a snake cased input string into a camel cased output.
func camel(str string) string {
@ -40,14 +79,6 @@ func camel(str string) string {
func init() {
for _, file := range tracers.AssetNames() {
name := camel(strings.TrimSuffix(file, ".js"))
all[name] = string(tracers.MustAsset(file))
jsTracers[name] = string(tracers.MustAsset(file))
}
}
// tracer retrieves a specific JavaScript tracer by name.
func tracer(name string) (string, bool) {
if tracer, ok := all[name]; ok {
return tracer, true
}
return "", false
}