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390 lines
14 KiB
390 lines
14 KiB
// Copyright 2021 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 tracetest
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import (
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"encoding/json"
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"io/ioutil"
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"math/big"
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"path/filepath"
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"reflect"
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"strings"
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"testing"
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"unicode"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/eth/tracers"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/tests"
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// Force-load native and js pacakges, to trigger registration
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_ "github.com/ethereum/go-ethereum/eth/tracers/js"
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_ "github.com/ethereum/go-ethereum/eth/tracers/native"
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)
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// To generate a new callTracer test, copy paste the makeTest method below into
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// a Geth console and call it with a transaction hash you which to export.
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/*
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// makeTest generates a callTracer test by running a prestate reassembled and a
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// call trace run, assembling all the gathered information into a test case.
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var makeTest = function(tx, rewind) {
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// Generate the genesis block from the block, transaction and prestate data
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var block = eth.getBlock(eth.getTransaction(tx).blockHash);
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var genesis = eth.getBlock(block.parentHash);
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delete genesis.gasUsed;
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delete genesis.logsBloom;
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delete genesis.parentHash;
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delete genesis.receiptsRoot;
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delete genesis.sha3Uncles;
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delete genesis.size;
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delete genesis.transactions;
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delete genesis.transactionsRoot;
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delete genesis.uncles;
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genesis.gasLimit = genesis.gasLimit.toString();
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genesis.number = genesis.number.toString();
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genesis.timestamp = genesis.timestamp.toString();
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genesis.alloc = debug.traceTransaction(tx, {tracer: "prestateTracer", rewind: rewind});
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for (var key in genesis.alloc) {
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genesis.alloc[key].nonce = genesis.alloc[key].nonce.toString();
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}
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genesis.config = admin.nodeInfo.protocols.eth.config;
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// Generate the call trace and produce the test input
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var result = debug.traceTransaction(tx, {tracer: "callTracer", rewind: rewind});
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delete result.time;
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console.log(JSON.stringify({
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genesis: genesis,
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context: {
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number: block.number.toString(),
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difficulty: block.difficulty,
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timestamp: block.timestamp.toString(),
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gasLimit: block.gasLimit.toString(),
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miner: block.miner,
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},
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input: eth.getRawTransaction(tx),
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result: result,
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}, null, 2));
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}
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*/
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type callContext struct {
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Number math.HexOrDecimal64 `json:"number"`
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Difficulty *math.HexOrDecimal256 `json:"difficulty"`
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Time math.HexOrDecimal64 `json:"timestamp"`
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GasLimit math.HexOrDecimal64 `json:"gasLimit"`
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Miner common.Address `json:"miner"`
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}
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// callTrace is the result of a callTracer run.
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type callTrace struct {
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Type string `json:"type"`
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From common.Address `json:"from"`
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To common.Address `json:"to"`
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Input hexutil.Bytes `json:"input"`
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Output hexutil.Bytes `json:"output"`
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Gas *hexutil.Uint64 `json:"gas,omitempty"`
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GasUsed *hexutil.Uint64 `json:"gasUsed,omitempty"`
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Value *hexutil.Big `json:"value,omitempty"`
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Error string `json:"error,omitempty"`
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Calls []callTrace `json:"calls,omitempty"`
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}
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// callTracerTest defines a single test to check the call tracer against.
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type callTracerTest struct {
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Genesis *core.Genesis `json:"genesis"`
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Context *callContext `json:"context"`
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Input string `json:"input"`
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Result *callTrace `json:"result"`
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}
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// Iterates over all the input-output datasets in the tracer test harness and
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// runs the JavaScript tracers against them.
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func TestCallTracerLegacy(t *testing.T) {
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testCallTracer("callTracerLegacy", "call_tracer_legacy", t)
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}
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func TestCallTracerNative(t *testing.T) {
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testCallTracer("callTracer", "call_tracer", t)
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}
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func testCallTracer(tracerName string, dirPath string, t *testing.T) {
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files, err := ioutil.ReadDir(filepath.Join("testdata", dirPath))
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if err != nil {
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t.Fatalf("failed to retrieve tracer test suite: %v", err)
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}
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for _, file := range files {
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if !strings.HasSuffix(file.Name(), ".json") {
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continue
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}
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file := file // capture range variable
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t.Run(camel(strings.TrimSuffix(file.Name(), ".json")), func(t *testing.T) {
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t.Parallel()
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var (
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test = new(callTracerTest)
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tx = new(types.Transaction)
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)
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// Call tracer test found, read if from disk
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if blob, err := ioutil.ReadFile(filepath.Join("testdata", dirPath, file.Name())); err != nil {
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t.Fatalf("failed to read testcase: %v", err)
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} else if err := json.Unmarshal(blob, test); err != nil {
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t.Fatalf("failed to parse testcase: %v", err)
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}
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if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
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t.Fatalf("failed to parse testcase input: %v", err)
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}
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// Configure a blockchain with the given prestate
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var (
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signer = types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number)))
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origin, _ = signer.Sender(tx)
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txContext = vm.TxContext{
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Origin: origin,
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GasPrice: tx.GasPrice(),
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}
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context = vm.BlockContext{
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CanTransfer: core.CanTransfer,
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Transfer: core.Transfer,
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Coinbase: test.Context.Miner,
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BlockNumber: new(big.Int).SetUint64(uint64(test.Context.Number)),
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Time: new(big.Int).SetUint64(uint64(test.Context.Time)),
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Difficulty: (*big.Int)(test.Context.Difficulty),
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GasLimit: uint64(test.Context.GasLimit),
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}
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_, statedb = tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false)
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)
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tracer, err := tracers.New(tracerName, new(tracers.Context))
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if err != nil {
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t.Fatalf("failed to create call tracer: %v", err)
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}
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evm := vm.NewEVM(context, txContext, statedb, test.Genesis.Config, vm.Config{Debug: true, Tracer: tracer})
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msg, err := tx.AsMessage(signer, nil)
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if err != nil {
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t.Fatalf("failed to prepare transaction for tracing: %v", err)
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}
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st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
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if _, err = st.TransitionDb(); err != nil {
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t.Fatalf("failed to execute transaction: %v", err)
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}
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// Retrieve the trace result and compare against the etalon
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res, err := tracer.GetResult()
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if err != nil {
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t.Fatalf("failed to retrieve trace result: %v", err)
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}
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ret := new(callTrace)
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if err := json.Unmarshal(res, ret); err != nil {
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t.Fatalf("failed to unmarshal trace result: %v", err)
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}
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if !jsonEqual(ret, test.Result) {
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// uncomment this for easier debugging
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//have, _ := json.MarshalIndent(ret, "", " ")
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//want, _ := json.MarshalIndent(test.Result, "", " ")
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//t.Fatalf("trace mismatch: \nhave %+v\nwant %+v", string(have), string(want))
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t.Fatalf("trace mismatch: \nhave %+v\nwant %+v", ret, test.Result)
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}
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})
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}
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}
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// jsonEqual is similar to reflect.DeepEqual, but does a 'bounce' via json prior to
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// comparison
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func jsonEqual(x, y interface{}) bool {
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xTrace := new(callTrace)
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yTrace := new(callTrace)
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if xj, err := json.Marshal(x); err == nil {
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json.Unmarshal(xj, xTrace)
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} else {
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return false
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}
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if yj, err := json.Marshal(y); err == nil {
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json.Unmarshal(yj, yTrace)
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} else {
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return false
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}
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return reflect.DeepEqual(xTrace, yTrace)
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}
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// camel converts a snake cased input string into a camel cased output.
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func camel(str string) string {
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pieces := strings.Split(str, "_")
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for i := 1; i < len(pieces); i++ {
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pieces[i] = string(unicode.ToUpper(rune(pieces[i][0]))) + pieces[i][1:]
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}
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return strings.Join(pieces, "")
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}
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func BenchmarkTracers(b *testing.B) {
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files, err := ioutil.ReadDir(filepath.Join("testdata", "call_tracer"))
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if err != nil {
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b.Fatalf("failed to retrieve tracer test suite: %v", err)
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}
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for _, file := range files {
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if !strings.HasSuffix(file.Name(), ".json") {
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continue
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}
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file := file // capture range variable
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b.Run(camel(strings.TrimSuffix(file.Name(), ".json")), func(b *testing.B) {
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blob, err := ioutil.ReadFile(filepath.Join("testdata", "call_tracer", file.Name()))
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if err != nil {
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b.Fatalf("failed to read testcase: %v", err)
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}
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test := new(callTracerTest)
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if err := json.Unmarshal(blob, test); err != nil {
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b.Fatalf("failed to parse testcase: %v", err)
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}
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benchTracer("callTracerNative", test, b)
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})
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}
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}
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func benchTracer(tracerName string, test *callTracerTest, b *testing.B) {
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// Configure a blockchain with the given prestate
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tx := new(types.Transaction)
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if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
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b.Fatalf("failed to parse testcase input: %v", err)
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}
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signer := types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number)))
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msg, err := tx.AsMessage(signer, nil)
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if err != nil {
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b.Fatalf("failed to prepare transaction for tracing: %v", err)
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}
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origin, _ := signer.Sender(tx)
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txContext := vm.TxContext{
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Origin: origin,
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GasPrice: tx.GasPrice(),
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}
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context := vm.BlockContext{
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CanTransfer: core.CanTransfer,
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Transfer: core.Transfer,
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Coinbase: test.Context.Miner,
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BlockNumber: new(big.Int).SetUint64(uint64(test.Context.Number)),
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Time: new(big.Int).SetUint64(uint64(test.Context.Time)),
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Difficulty: (*big.Int)(test.Context.Difficulty),
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GasLimit: uint64(test.Context.GasLimit),
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}
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_, statedb := tests.MakePreState(rawdb.NewMemoryDatabase(), test.Genesis.Alloc, false)
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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tracer, err := tracers.New(tracerName, new(tracers.Context))
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if err != nil {
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b.Fatalf("failed to create call tracer: %v", err)
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}
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evm := vm.NewEVM(context, txContext, statedb, test.Genesis.Config, vm.Config{Debug: true, Tracer: tracer})
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snap := statedb.Snapshot()
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st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
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if _, err = st.TransitionDb(); err != nil {
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b.Fatalf("failed to execute transaction: %v", err)
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}
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if _, err = tracer.GetResult(); err != nil {
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b.Fatal(err)
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}
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statedb.RevertToSnapshot(snap)
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}
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}
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// TestZeroValueToNotExitCall tests the calltracer(s) on the following:
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// Tx to A, A calls B with zero value. B does not already exist.
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// Expected: that enter/exit is invoked and the inner call is shown in the result
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func TestZeroValueToNotExitCall(t *testing.T) {
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var to = common.HexToAddress("0x00000000000000000000000000000000deadbeef")
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privkey, err := crypto.HexToECDSA("0000000000000000deadbeef00000000000000000000000000000000deadbeef")
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if err != nil {
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t.Fatalf("err %v", err)
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}
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signer := types.NewEIP155Signer(big.NewInt(1))
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tx, err := types.SignNewTx(privkey, signer, &types.LegacyTx{
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GasPrice: big.NewInt(0),
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Gas: 50000,
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To: &to,
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})
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if err != nil {
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t.Fatalf("err %v", err)
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}
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origin, _ := signer.Sender(tx)
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txContext := vm.TxContext{
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Origin: origin,
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GasPrice: big.NewInt(1),
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}
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context := vm.BlockContext{
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CanTransfer: core.CanTransfer,
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Transfer: core.Transfer,
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Coinbase: common.Address{},
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BlockNumber: new(big.Int).SetUint64(8000000),
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Time: new(big.Int).SetUint64(5),
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Difficulty: big.NewInt(0x30000),
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GasLimit: uint64(6000000),
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}
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var code = []byte{
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byte(vm.PUSH1), 0x0, byte(vm.DUP1), byte(vm.DUP1), byte(vm.DUP1), // in and outs zero
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byte(vm.DUP1), byte(vm.PUSH1), 0xff, byte(vm.GAS), // value=0,address=0xff, gas=GAS
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byte(vm.CALL),
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}
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var alloc = core.GenesisAlloc{
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to: core.GenesisAccount{
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Nonce: 1,
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Code: code,
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},
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origin: core.GenesisAccount{
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Nonce: 0,
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Balance: big.NewInt(500000000000000),
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},
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}
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_, statedb := tests.MakePreState(rawdb.NewMemoryDatabase(), alloc, false)
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// Create the tracer, the EVM environment and run it
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tracer, err := tracers.New("callTracer", nil)
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if err != nil {
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t.Fatalf("failed to create call tracer: %v", err)
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}
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evm := vm.NewEVM(context, txContext, statedb, params.MainnetChainConfig, vm.Config{Debug: true, Tracer: tracer})
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msg, err := tx.AsMessage(signer, nil)
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if err != nil {
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t.Fatalf("failed to prepare transaction for tracing: %v", err)
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}
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st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
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if _, err = st.TransitionDb(); err != nil {
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t.Fatalf("failed to execute transaction: %v", err)
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}
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// Retrieve the trace result and compare against the etalon
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res, err := tracer.GetResult()
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if err != nil {
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t.Fatalf("failed to retrieve trace result: %v", err)
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}
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have := new(callTrace)
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if err := json.Unmarshal(res, have); err != nil {
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t.Fatalf("failed to unmarshal trace result: %v", err)
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}
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wantStr := `{"type":"CALL","from":"0x682a80a6f560eec50d54e63cbeda1c324c5f8d1b","to":"0x00000000000000000000000000000000deadbeef","value":"0x0","gas":"0x7148","gasUsed":"0x2d0","input":"0x","output":"0x","calls":[{"type":"CALL","from":"0x00000000000000000000000000000000deadbeef","to":"0x00000000000000000000000000000000000000ff","value":"0x0","gas":"0x6cbf","gasUsed":"0x0","input":"0x","output":"0x"}]}`
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want := new(callTrace)
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json.Unmarshal([]byte(wantStr), want)
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if !jsonEqual(have, want) {
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t.Error("have != want")
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}
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}
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