eth/tracer: extend create2 (#18318)

* eth/tracer: extend create2

* eth/tracers: fix create2-flaw in prestate_tracer

* eth/tracers: fix test

* eth/tracers: update assets
This commit is contained in:
gary rong authored and Martin Holst Swende committed 2019-01-05 21:26:50 +01:00
1 parent c1c4301121
commit e8ff318205
6 files changed
+122 -10

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+6 -6
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@@ -2,11 +2,11 @@
// sources:
// 4byte_tracer.js (2.933kB)
// bigram_tracer.js (1.712kB)
// call_tracer.js (8.596kB)
// call_tracer.js (8.643kB)
// evmdis_tracer.js (4.194kB)
// noop_tracer.js (1.271kB)
// opcount_tracer.js (1.372kB)
// prestate_tracer.js (3.892kB)
// prestate_tracer.js (4.234kB)
// trigram_tracer.js (1.788kB)
// unigram_tracer.js (1.51kB)
@@ -117,7 +117,7 @@ func bigram_tracerJs() (*asset, error) {
return a, nil
}
var _call_tracerJs = 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truncated
var _call_tracerJs = 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truncated
func call_tracerJsBytes() ([]byte, error) {
return bindataRead(
@@ -133,7 +133,7 @@ func call_tracerJs() (*asset, error) {
}
info := bindataFileInfo{name: "call_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xf5, 0xb3, 0xb6, 0xe8, 0x19, 0xc3, 0xa, 0xce, 0xfd, 0x50, 0x84, 0xf7, 0x8a, 0xc5, 0x99, 0x10, 0x58, 0xc4, 0x69, 0xfb, 0x8, 0xad, 0x67, 0xea, 0x12, 0x38, 0xcb, 0xd, 0x2a, 0x94, 0xa1, 0x70}}
a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xe9, 0xef, 0x68, 0xda, 0xd8, 0x9, 0xf5, 0xd5, 0x71, 0xa8, 0x8a, 0xfb, 0x30, 0xe8, 0xf0, 0x72, 0x14, 0x36, 0x6b, 0x62, 0x5a, 0x4e, 0xff, 0x16, 0xdc, 0xd3, 0x2c, 0x68, 0x7b, 0x79, 0x9f, 0xd3}}
return a, nil
}
@@ -197,7 +197,7 @@ func opcount_tracerJs() (*asset, error) {
return a, nil
}
var _prestate_tracerJs = 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var _prestate_tracerJs = 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truncated
func prestate_tracerJsBytes() ([]byte, error) {
return bindataRead(
@@ -213,7 +213,7 @@ func prestate_tracerJs() (*asset, error) {
}
info := bindataFileInfo{name: "prestate_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xd, 0xb0, 0x72, 0x28, 0xc7, 0x27, 0x97, 0x4d, 0xe, 0xbf, 0x29, 0xe1, 0xa8, 0xd7, 0x52, 0x13, 0xa1, 0x19, 0xc3, 0xfb, 0x8d, 0x5b, 0xcb, 0xdd, 0xa5, 0xd7, 0x98, 0x34, 0x6a, 0xbf, 0x33, 0x6c}}
a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xe9, 0x79, 0x70, 0x4f, 0xc5, 0x78, 0x57, 0x63, 0x6f, 0x5, 0x31, 0xce, 0x3e, 0x5d, 0xbd, 0x71, 0x4, 0x46, 0x78, 0xcd, 0x1d, 0xcd, 0xb9, 0xd8, 0x10, 0xff, 0xe6, 0xc5, 0x59, 0xb9, 0x25, 0x6e}}
return a, nil
}
+2 -2
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@@ -38,7 +38,7 @@
var op = log.op.toString();
}
// If a new contract is being created, add to the call stack
if (syscall && op == 'CREATE') {
if (syscall && (op == 'CREATE' || op == "CREATE2")) {
var inOff = log.stack.peek(1).valueOf();
var inEnd = inOff + log.stack.peek(2).valueOf();
@@ -116,7 +116,7 @@
// Pop off the last call and get the execution results
var call = this.callstack.pop();
if (call.type == 'CREATE') {
if (call.type == 'CREATE' || call.type == "CREATE2") {
// If the call was a CREATE, retrieve the contract address and output code
call.gasUsed = '0x' + bigInt(call.gasIn - call.gasCost - log.getGas()).toString(16);
delete call.gasIn; delete call.gasCost;
@@ -86,6 +86,14 @@
var from = log.contract.getAddress();
this.lookupAccount(toContract(from, db.getNonce(from)), db);
break;
case "CREATE2":
var from = log.contract.getAddress();
// stack: salt, size, offset, endowment
var offset = log.stack.peek(1).valueOf()
var size = log.stack.peek(2).valueOf()
var end = offset + size
this.lookupAccount(toContract2(from, log.stack.peek(3).toString(16), log.memory.slice(offset, end)), db);
break;
case "CALL": case "CALLCODE": case "DELEGATECALL": case "STATICCALL":
this.lookupAccount(toAddress(log.stack.peek(1).toString(16)), db);
break;
+1 -1
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@@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
//go:generate go-bindata -nometadata -o assets.go -pkg tracers -ignore ((tracers)|(assets)).go ./...
//go:generate go-bindata -nometadata -o assets.go -pkg tracers -ignore tracers.go -ignore assets.go ./...
//go:generate gofmt -s -w assets.go
// Package tracers contains the actual JavaScript tracer assets.
+22
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@@ -367,6 +367,28 @@ func New(code string) (*Tracer, error) {
copy(makeSlice(ctx.PushFixedBuffer(20), 20), contract[:])
return 1
})
tracer.vm.PushGlobalGoFunction("toContract2", func(ctx *duktape.Context) int {
var from common.Address
if ptr, size := ctx.GetBuffer(-3); ptr != nil {
from = common.BytesToAddress(makeSlice(ptr, size))
} else {
from = common.HexToAddress(ctx.GetString(-3))
}
// Retrieve salt hex string from js stack
salt := common.HexToHash(ctx.GetString(-2))
// Retrieve code slice from js stack
var code []byte
if ptr, size := ctx.GetBuffer(-1); ptr != nil {
code = common.CopyBytes(makeSlice(ptr, size))
} else {
code = common.FromHex(ctx.GetString(-1))
}
codeHash := crypto.Keccak256(code)
ctx.Pop3()
contract := crypto.CreateAddress2(from, salt, codeHash)
copy(makeSlice(ctx.PushFixedBuffer(20), 20), contract[:])
return 1
})
tracer.vm.PushGlobalGoFunction("isPrecompiled", func(ctx *duktape.Context) int {
_, ok := vm.PrecompiledContractsByzantium[common.BytesToAddress(popSlice(ctx))]
ctx.PushBoolean(ok)
+83 -1
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@@ -17,6 +17,8 @@
package tracers
import (
"crypto/ecdsa"
"crypto/rand"
"encoding/json"
"io/ioutil"
"math/big"
@@ -31,7 +33,9 @@ import (
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/tests"
)
@@ -116,6 +120,83 @@ type callTracerTest struct {
Result *callTrace `json:"result"`
}
func TestPrestateTracerCreate2(t *testing.T) {
unsigned_tx := types.NewTransaction(1, common.HexToAddress("0x00000000000000000000000000000000deadbeef"),
new(big.Int), 5000000, big.NewInt(1), []byte{})
privateKeyECDSA, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
if err != nil {
t.Fatalf("err %v", err)
}
signer := types.NewEIP155Signer(big.NewInt(1))
tx, err := types.SignTx(unsigned_tx, signer, privateKeyECDSA)
if err != nil {
t.Fatalf("err %v", err)
}
/**
This comes from one of the test-vectors on the Skinny Create2 - EIP
address 0x00000000000000000000000000000000deadbeef
salt 0x00000000000000000000000000000000000000000000000000000000cafebabe
init_code 0xdeadbeef
gas (assuming no mem expansion): 32006
result: 0x60f3f640a8508fC6a86d45DF051962668E1e8AC7
*/
origin, _ := signer.Sender(tx)
context := vm.Context{
CanTransfer: core.CanTransfer,
Transfer: core.Transfer,
Origin: origin,
Coinbase: common.Address{},
BlockNumber: new(big.Int).SetUint64(8000000),
Time: new(big.Int).SetUint64(5),
Difficulty: big.NewInt(0x30000),
GasLimit: uint64(6000000),
GasPrice: big.NewInt(1),
}
alloc := core.GenesisAlloc{}
// The code pushes 'deadbeef' into memory, then the other params, and calls CREATE2, then returns
// the address
alloc[common.HexToAddress("0x00000000000000000000000000000000deadbeef")] = core.GenesisAccount{
Nonce: 1,
Code: hexutil.MustDecode("0x63deadbeef60005263cafebabe6004601c6000F560005260206000F3"),
Balance: big.NewInt(1),
}
alloc[origin] = core.GenesisAccount{
Nonce: 1,
Code: []byte{},
Balance: big.NewInt(500000000000000),
}
statedb := tests.MakePreState(ethdb.NewMemDatabase(), alloc)
// Create the tracer, the EVM environment and run it
tracer, err := New("prestateTracer")
if err != nil {
t.Fatalf("failed to create call tracer: %v", err)
}
evm := vm.NewEVM(context, statedb, params.MainnetChainConfig, vm.Config{Debug: true, Tracer: tracer})
msg, err := tx.AsMessage(signer)
if err != nil {
t.Fatalf("failed to prepare transaction for tracing: %v", err)
}
st := core.NewStateTransition(evm, msg, new(core.GasPool).AddGas(tx.Gas()))
if _, _, _, err = st.TransitionDb(); err != nil {
t.Fatalf("failed to execute transaction: %v", err)
}
// Retrieve the trace result and compare against the etalon
res, err := tracer.GetResult()
if err != nil {
t.Fatalf("failed to retrieve trace result: %v", err)
}
ret := make(map[string]interface{})
if err := json.Unmarshal(res, &ret); err != nil {
t.Fatalf("failed to unmarshal trace result: %v", err)
}
if _, has := ret["0x60f3f640a8508fc6a86d45df051962668e1e8ac7"]; !has {
t.Fatalf("Expected 0x60f3f640a8508fc6a86d45df051962668e1e8ac7 in result")
}
}
// Iterates over all the input-output datasets in the tracer test harness and
// runs the JavaScript tracers against them.
func TestCallTracer(t *testing.T) {
@@ -185,8 +266,9 @@ func TestCallTracer(t *testing.T) {
if err := json.Unmarshal(res, ret); err != nil {
t.Fatalf("failed to unmarshal trace result: %v", err)
}
if !reflect.DeepEqual(ret, test.Result) {
t.Fatalf("trace mismatch: have %+v, want %+v", ret, test.Result)
t.Fatalf("trace mismatch: \nhave %+v\nwant %+v", ret, test.Result)
}
})
}