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eth, tests: prestate tracer, call test suite, rewinding

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This commit is contained in:
Péter Szilágyi 2017-12-19 14:03:17 +02:00
parent becec012ef
commit 4aecb6c273
25 changed files with 1495 additions and 230 deletions
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2
eth/api.go
View file

@ -368,7 +368,7 @@ type storageEntry struct {
// StorageRangeAt returns the storage at the given block height and transaction index.
func (api *PrivateDebugAPI) StorageRangeAt(ctx context.Context, blockHash common.Hash, txIndex int, contractAddress common.Address, keyStart hexutil.Bytes, maxResult int) (StorageRangeResult, error) {
_, _, statedb, err := api.computeTxEnv(blockHash, txIndex)
_, _, statedb, err := api.computeTxEnv(blockHash, txIndex, 0)
if err != nil {
return StorageRangeResult{}, err
}

129
eth/api_tracer.go
View file

@ -191,6 +191,12 @@ func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Bl
diskdb: api.eth.ChainDb(),
memdb: memdb,
}
if number := start.NumberU64(); number > 0 {
start = api.eth.blockchain.GetBlock(start.ParentHash(), start.NumberU64()-1)
if start == nil {
return nil, fmt.Errorf("parent block #%d not found", number-1)
}
}
statedb, err := state.New(start.Root(), state.NewDatabase(db))
if err != nil {
// If the starting state is missing, allow some number of blocks to be rewound
@ -210,7 +216,12 @@ func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Bl
}
// If we still don't have the state available, bail out
if err != nil {
return nil, err
switch err.(type) {
case *trie.MissingNodeError:
return nil, errors.New("required historical state unavailable")
default:
return nil, err
}
}
}
// Execute all the transaction contained within the chain concurrently for each block
@ -346,10 +357,12 @@ func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Bl
}
}
// No more concurrent access at this point, prune the database
log.Info("Pruning tracer database", "nodes", db.memdb.Len())
start := time.Now()
var (
nodes = db.memdb.Len()
start = time.Now()
)
db.Prune(root)
log.Info("Tracer database pruned", "nodes", db.memdb.Len(), "elapsed", time.Since(start))
log.Info("Pruned tracer state entries", "deleted", nodes-db.memdb.Len(), "left", db.memdb.Len(), "elapsed", time.Since(start))
statedb, _ = state.New(root, state.NewDatabase(db))
}
@ -448,6 +461,14 @@ func (api *PrivateDebugAPI) traceBlock(ctx context.Context, block *types.Block,
if parent == nil {
return nil, fmt.Errorf("parent %x not found", block.ParentHash())
}
rewind := defaultTraceRewind
if config.Rewind != nil {
rewind = *config.Rewind
}
statedb, err := api.computeStateDB(parent, rewind)
if err != nil {
return nil, err
}
// Execute all the transaction contained within the block concurrently
var (
signer = types.MakeSigner(api.config, block.Number())
@ -482,10 +503,6 @@ func (api *PrivateDebugAPI) traceBlock(ctx context.Context, block *types.Block,
}()
}
// Feed the transactions into the tracers and return
statedb, err := api.eth.blockchain.StateAt(parent.Root())
if err != nil {
return nil, err
}
var failed error
for i, tx := range txs {
// Send the trace task over for execution
@ -513,6 +530,83 @@ func (api *PrivateDebugAPI) traceBlock(ctx context.Context, block *types.Block,
return results, nil
}
// computeStateDB retrieves the state database associated with a certain block.
// If no state is locally available for the given block, a number of blocks are
// attempted to be rewound and replayed to regenerate the desired state.
func (api *PrivateDebugAPI) computeStateDB(block *types.Block, rewind uint64) (*state.StateDB, error) {
// If we have the state fully available, use that
statedb, err := api.eth.blockchain.StateAt(block.Root())
if err == nil {
return statedb, nil
}
// Otherwise try to rewind blocks until we find a state or reach our limit
origin := block.NumberU64()
memdb, _ := ethdb.NewMemDatabase()
db := &ephemeralDatabase{
diskdb: api.eth.ChainDb(),
memdb: memdb,
}
for i := uint64(0); i < rewind; i++ {
block = api.eth.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1)
if block == nil {
break
}
if statedb, err = state.New(block.Root(), state.NewDatabase(db)); err == nil {
break
}
}
if err != nil {
switch err.(type) {
case *trie.MissingNodeError:
return nil, errors.New("required historical state unavailable")
default:
return nil, err
}
}
// State was available at historical point, regenerate
var (
start = time.Now()
logged time.Time
)
for block.NumberU64() < origin {
// Print progress logs if long enough time elapsed
if time.Since(logged) > 8*time.Second {
log.Info("Regenerating historical state", "block", block.NumberU64()+1, "target", origin, "elapsed", time.Since(start))
logged = time.Now()
}
// Retrieve the next block to regenerate and process it
if block = api.eth.blockchain.GetBlockByNumber(block.NumberU64() + 1); block == nil {
return nil, fmt.Errorf("block #%d not found", block.NumberU64()+1)
}
_, _, _, err := api.eth.blockchain.Processor().Process(block, statedb, vm.Config{})
if err != nil {
return nil, err
}
// Finalize the state so any modifications are written to the trie
root, err := statedb.CommitTo(db, true)
if err != nil {
return nil, err
}
if err := statedb.Reset(root); err != nil {
return nil, err
}
// After every N blocks, prune the database to only retain relevant data
if block.NumberU64()%4096 == 0 || block.NumberU64() == origin {
var (
nodes = db.memdb.Len()
begin = time.Now()
)
db.Prune(root)
log.Info("Pruned tracer state entries", "deleted", nodes-db.memdb.Len(), "left", db.memdb.Len(), "elapsed", time.Since(begin))
statedb, _ = state.New(root, state.NewDatabase(db))
}
}
log.Info("Historical state regenerated", "block", block.NumberU64(), "elapsed", time.Since(start))
return statedb, nil
}
// TraceTransaction returns the structured logs created during the execution of EVM
// and returns them as a JSON object.
func (api *PrivateDebugAPI) TraceTransaction(ctx context.Context, hash common.Hash, config *TraceConfig) (interface{}, error) {
@ -521,7 +615,11 @@ func (api *PrivateDebugAPI) TraceTransaction(ctx context.Context, hash common.Ha
if tx == nil {
return nil, fmt.Errorf("transaction %x not found", hash)
}
msg, vmctx, statedb, err := api.computeTxEnv(blockHash, int(index))
rewind := defaultTraceRewind
if config.Rewind != nil {
rewind = *config.Rewind
}
msg, vmctx, statedb, err := api.computeTxEnv(blockHash, int(index), rewind)
if err != nil {
return nil, err
}
@ -548,17 +646,14 @@ func (api *PrivateDebugAPI) traceTx(ctx context.Context, message core.Message, v
}
}
// Constuct the JavaScript tracer to execute with
if tracer, ok := tracers.Tracer(*config.Tracer); ok {
*config.Tracer = tracer
}
if tracer, err = ethapi.NewJavascriptTracer(*config.Tracer); err != nil {
if tracer, err = tracers.New(*config.Tracer); err != nil {
return nil, err
}
// Handle timeouts and RPC cancellations
deadlineCtx, cancel := context.WithTimeout(ctx, timeout)
go func() {
<-deadlineCtx.Done()
tracer.(*ethapi.JavascriptTracer).Stop(errors.New("execution timeout"))
tracer.(*tracers.Tracer).Stop(errors.New("execution timeout"))
}()
defer cancel()
@ -585,7 +680,7 @@ func (api *PrivateDebugAPI) traceTx(ctx context.Context, message core.Message, v
StructLogs: ethapi.FormatLogs(tracer.StructLogs()),
}, nil
case *ethapi.JavascriptTracer:
case *tracers.Tracer:
return tracer.GetResult()
default:
@ -594,7 +689,7 @@ func (api *PrivateDebugAPI) traceTx(ctx context.Context, message core.Message, v
}
// computeTxEnv returns the execution environment of a certain transaction.
func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int) (core.Message, vm.Context, *state.StateDB, error) {
func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int, rewind uint64) (core.Message, vm.Context, *state.StateDB, error) {
// Create the parent state database
block := api.eth.blockchain.GetBlockByHash(blockHash)
if block == nil {
@ -604,7 +699,7 @@ func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int) (co
if parent == nil {
return nil, vm.Context{}, nil, fmt.Errorf("parent %x not found", block.ParentHash())
}
statedb, err := api.eth.blockchain.StateAt(parent.Root())
statedb, err := api.computeStateDB(parent, rewind)
if err != nil {
return nil, vm.Context{}, nil, err
}

10
eth/handler.go
View file

@ -747,10 +747,11 @@ func (self *ProtocolManager) txBroadcastLoop() {
// EthNodeInfo represents a short summary of the Ethereum sub-protocol metadata known
// about the host peer.
type EthNodeInfo struct {
Network uint64 `json:"network"` // Ethereum network ID (1=Frontier, 2=Morden, Ropsten=3)
Difficulty *big.Int `json:"difficulty"` // Total difficulty of the host's blockchain
Genesis common.Hash `json:"genesis"` // SHA3 hash of the host's genesis block
Head common.Hash `json:"head"` // SHA3 hash of the host's best owned block
Network uint64 `json:"network"` // Ethereum network ID (1=Frontier, 2=Morden, Ropsten=3)
Difficulty *big.Int `json:"difficulty"` // Total difficulty of the host's blockchain
Genesis common.Hash `json:"genesis"` // SHA3 hash of the host's genesis block
Config *params.ChainConfig `json:"config"` // Chain configuration for the fork rules
Head common.Hash `json:"head"` // SHA3 hash of the host's best owned block
}
// NodeInfo retrieves some protocol metadata about the running host node.
@ -760,6 +761,7 @@ func (self *ProtocolManager) NodeInfo() *EthNodeInfo {
Network: self.networkId,
Difficulty: self.blockchain.GetTd(currentBlock.Hash(), currentBlock.NumberU64()),
Genesis: self.blockchain.Genesis().Hash(),
Config: self.blockchain.Config(),
Head: currentBlock.Hash(),
}
}

74
eth/tracers/internal/tracers/assets.go
View file

File diff suppressed because one or more lines are too long

2
eth/tracers/internal/tracers/call_tracer.js
View file

@ -172,7 +172,7 @@
// result is invoked when all the opcodes have been iterated over and returns
// the final result of the tracing.
result: function(ctx) {
result: function(ctx, db) {
var result = {
type: ctx.type,
from: toHex(ctx.from),

2
eth/tracers/internal/tracers/emvdis_tracer.js
View file

@ -1,5 +1,5 @@
/**
This tracer returns sufficent information from a trace to
This tracer returns sufficent information from a trace to
perform evmdis-style disassembly
@author Nick Johnson, Martin Swende

131
eth/tracers/internal/tracers/genesis_tracer.js
View file

@ -1,131 +0,0 @@
/**
This tracer-script outputs sufficient information to create a local
execution of the transaction.
@author Martin Holst Swende
**/
{
//The genesis that we're building
prestate : null,
lookupAccount: function(acc,db){
var addr = toHex(acc);
if(this.prestate[addr]) return;
this.prestate[addr] = {
'balance': db.getBalance(acc),
'nonce' : db.getNonce(acc),
'code' : toHex(db.getCode(acc)),
'storage' : {}
};
},
lookupStorage: function(addr, index, db){
//No overwrite
if (!this.prestate[addr]['storage'][index]){
this.prestate[addr]['storage'][index] = db.getState(addr,key);
}
},
result: function(ctx,db) {
// At this point, we need to deduct the 'value' from the
// outer transaction, and move it back to the origin
var from = toAddress(ctx.from);
var to = toAddress(ctx.to);
var v = ctx.value;
this.lookupAccount(from, db);
// Add back value to sender (bigints)
var from_bal = this.prestate[toHex(from)]['balance'];
var to_bal = this.prestate[toHex(to)]['balance'];
to_bal.Sub(to_bal, v);
from_bal.Add(from_bal, v);
// Set back nonce (uint64)
this.prestate[toHex(from)]['nonce']--;
//Note, the sender-account still may not be 100% correct,
// since we haven't accounted for the gas.
//Homestead
config = {
"eip150Block": 2000,
"eip158Block": 2000,
"eip155Block": 2000,
"homesteadBlock": 0,
"daoForkBlock": 0,
"byzantiumBlock" : 2000,
}
var blnum = ctx['blocknumber']
if (blnum > 2463000){
// Tangerine: disable
config["eip150Block"] = 0;
}
if (blnum > 2675000){
// Spurious
config["eip155Block"] = 0;
config["eip158Block"] = 0;
}
if (blnum > 4370000){
//Byzantium
config["byzantiumBlock"] = 0;
}
genesis ={
nonce: "0x0000000000000000",
difficulty: "0x020000",
mixhash: "0x0000000000000000000000000000000000000000000000000000000000000000",
coinbase: "0x0000000000000000000000000000000000000000",
timestamp: "0x00",
number: "0x00",
parentHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
extraData: "0x0000000000000000000000000000000000000000000000000000000000000000",
gasLimit: toHex(ctx['gas'].Bytes()),
alloc: this.prestate,
config: config,
};
return genesis;
},
step: function(log, db) {
if (!this.prestate){
// Add the current account
this.prestate = {};
// Balance will potentially be wrong here,
// since this will include the value sent
// along with the message
// We fix that in 'result()'
this.lookupAccount(log.account,db);
}
switch(log.op.toString()){
case "EXTCODECOPY":
case "EXTCODESIZE":
case "BALANCE":
var addr = log.peek(0).Text(16);
this.lookupAccount(addr,db);
break;
case "CALL":
case "CALLCODE":
case "DELEGATECALL":
case "STATICCALL":
var addr = log.stack.peek(1).Text(16);
this.lookupAccount(addr,db);
break;
case 'SSTORE':
case 'SLOAD':
var key = log.stack.peek(0).Text(16);
this.lookupStorage(log.account.Text(16), key,db);
break;
}
}
}
/** TODO
Missing BLOCKNUM
Somehow get 'origin'-account in there.
**/

2
eth/tracers/internal/tracers/noop_tracer.js
View file

@ -9,5 +9,5 @@
// result is invoked when all the opcodes have been iterated over and returns
// the final result of the tracing.
result: function(ctx) { }
result: function(ctx, db) { }
}

2
eth/tracers/internal/tracers/opcount_tracer.js
View file

@ -12,5 +12,5 @@
// result is invoked when all the opcodes have been iterated over and returns
// the final result of the tracing.
result: function(ctx) { return this.count }
result: function(ctx, db) { return this.count }
}

87
eth/tracers/internal/tracers/prestate_tracer.js Normal file
View file

@ -0,0 +1,87 @@
// prestateTracer outputs sufficient information to create a local execution of
// the transaction from a custom assembled genesis block.
{
// prestate is the genesis that we're building.
prestate: null,
// lookupAccount injects the specified account into the prestate object.
lookupAccount: function(addr, db){
var acc = toHex(addr);
if (this.prestate[acc] === undefined) {
this.prestate[acc] = {
balance: '0x' + db.getBalance(addr).toString(16),
nonce: db.getNonce(addr),
code: toHex(db.getCode(addr)),
storage: {}
};
}
},
// lookupStorage injects the specified storage entry of the given account into
// the prestate object.
lookupStorage: function(addr, key, db){
var acc = toHex(addr);
var idx = toHex(key);
if (this.prestate[acc].storage[idx] === undefined) {
var val = toHex(db.getState(addr, key));
if (val != "0x0000000000000000000000000000000000000000000000000000000000000000") {
this.prestate[acc].storage[idx] = toHex(db.getState(addr, key));
}
}
},
// result is invoked when all the opcodes have been iterated over and returns
// the final result of the tracing.
result: function(ctx, db) {
// At this point, we need to deduct the 'value' from the
// outer transaction, and move it back to the origin
this.lookupAccount(ctx.from, db);
var fromBal = bigInt(this.prestate[toHex(ctx.from)].balance.slice(2), 16);
var toBal = bigInt(this.prestate[toHex(ctx.to)].balance.slice(2), 16);
this.prestate[toHex(ctx.to)].balance = '0x'+toBal.subtract(ctx.value).toString(16);
this.prestate[toHex(ctx.from)].balance = '0x'+fromBal.add(ctx.value).toString(16);
// Decrement the caller's nonce, and remove empty create targets
this.prestate[toHex(ctx.from)].nonce--;
if (ctx.type == 'CREATE') {
// We can blibdly delete the contract prestate, as any existing state would
// have caused the transaction to be rejected as invalid in the first place.
delete this.prestate[toHex(ctx.to)];
}
// Return the assembled allocations (prestate)
return this.prestate;
},
// step is invoked for every opcode that the VM executes.
step: function(log, db) {
// Add the current account if we just started tracing
if (this.prestate === null){
this.prestate = {};
// Balance will potentially be wrong here, since this will include the value
// sent along with the message. We fix that in 'result()'.
this.lookupAccount(log.contract.getAddress(), db);
}
// Whenever new state is accessed, add it to the prestate
switch (log.op.toString()) {
case "EXTCODECOPY": case "EXTCODESIZE": case "BALANCE":
this.lookupAccount(toAddress(log.stack.peek(0).toString(16)), db);
break;
case "CREATE":
var from = log.contract.getAddress();
this.lookupAccount(toContract(from, db.getNonce(from)), db);
break;
case "CALL": case "CALLCODE": case "DELEGATECALL": case "STATICCALL":
this.lookupAccount(toAddress(log.stack.peek(1).toString(16)), db);
break;
case 'SSTORE':case 'SLOAD':
this.lookupStorage(log.contract.getAddress(), toWord(log.stack.peek(0).toString(16)), db);
break;
}
},
// fault is invoked when the actual execution of an opcode fails.
fault: function(log, db) {}
}

58
eth/tracers/testdata/call_tracer_create.json vendored Normal file
View file

@ -0,0 +1,58 @@
{
"context": {
"difficulty": "3755480783",
"gasLimit": "5401723",
"miner": "0xd049bfd667cb46aa3ef5df0da3e57db3be39e511",
"number": "2294702",
"timestamp": "1513676146"
},
"genesis": {
"alloc": {
"0x13e4acefe6a6700604929946e70e6443e4e73447": {
"balance": "0xcf3e0938579f000",
"code": "0x",
"nonce": "9",
"storage": {}
},
"0x7dc9c9730689ff0b0fd506c67db815f12d90a448": {
"balance": "0x0",
"code": "0x",
"nonce": "0",
"storage": {}
}
},
"config": {
"byzantiumBlock": 1700000,
"chainId": 3,
"daoForkSupport": true,
"eip150Block": 0,
"eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
"eip155Block": 10,
"eip158Block": 10,
"ethash": {},
"homesteadBlock": 0
},
"difficulty": "3757315409",
"extraData": "0x566961425443",
"gasLimit": "5406414",
"hash": "0xae107f592eebdd9ff8d6ba00363676096e6afb0e1007a7d3d0af88173077378d",
"miner": "0xd049bfd667cb46aa3ef5df0da3e57db3be39e511",
"mixHash": "0xc927aa05a38bc3de864e95c33b3ae559d3f39c4ccd51cef6f113f9c50ba0caf1",
"nonce": "0x93363bbd2c95f410",
"number": "2294701",
"stateRoot": "0x6b6737d5bde8058990483e915866bd1578014baeff57bd5e4ed228a2bfad635c",
"timestamp": "1513676127",
"totalDifficulty": "7160808139332585"
},
"input": "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",
"result": {
"from": "0x13e4acefe6a6700604929946e70e6443e4e73447",
"gas": "0x5e106",
"gasUsed": "0x5e106",
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}

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{
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78
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{
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"gas": "0x10738",
"gasUsed": "0x3ef9",
"input": "0x63e4bff40000000000000000000000000024f658a46fbb89d8ac105e98d7ac7cbbaf27c5",
"output": "0x0000000000000000000000000000000000000000000000000000000000000001",
"to": "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe",
"type": "CALL",
"value": "0x0"
}
}

62
eth/tracers/testdata/call_tracer_throw.json vendored Normal file
View file

File diff suppressed because one or more lines are too long

62
internal/ethapi/tracer.go → eth/tracers/tracer.go
View file

@ -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/>.
package ethapi
package tracers
import (
"encoding/json"
@ -28,6 +28,7 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
duktape "gopkg.in/olebedev/go-duktape.v3"
)
@ -273,9 +274,9 @@ func (cw *contractWrapper) pushObject(vm *duktape.Context) {
vm.PutPropString(obj, "getInput")
}
// JavascriptTracer provides an implementation of Tracer that evaluates a
// Javascript function for each VM execution step.
type JavascriptTracer struct {
// Tracer provides an implementation of Tracer that evaluates a Javascript
// function for each VM execution step.
type Tracer struct {
inited bool // Flag whether the context was already inited from the EVM
vm *duktape.Context // Javascript VM instance
@ -302,11 +303,15 @@ type JavascriptTracer struct {
reason error // Textual reason for the interruption
}
// NewJavascriptTracer instantiates a new JavascriptTracer instance.
// code specifies a Javascript snippet, which must evaluate to an expression
// returning an object with 'step' and 'result' functions.
func NewJavascriptTracer(code string) (*JavascriptTracer, error) {
tracer := &JavascriptTracer{
// 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 New(code string) (*Tracer, error) {
// Resolve any tracers by name and assemble the tracer object
if tracer, ok := tracer(code); ok {
code = tracer
}
tracer := &Tracer{
vm: duktape.New(),
ctx: make(map[string]interface{}),
opWrapper: new(opWrapper),
@ -324,6 +329,17 @@ func NewJavascriptTracer(code string) (*JavascriptTracer, error) {
ctx.PushString(hexutil.Encode(popSlice(ctx)))
return 1
})
tracer.vm.PushGlobalGoFunction("toWord", func(ctx *duktape.Context) int {
var word common.Hash
if ptr, size := ctx.GetBuffer(-1); ptr != nil {
word = common.BytesToHash(makeSlice(ptr, size))
} else {
word = common.HexToHash(ctx.GetString(-1))
}
ctx.Pop()
copy(makeSlice(ctx.PushFixedBuffer(32), 32), word[:])
return 1
})
tracer.vm.PushGlobalGoFunction("toAddress", func(ctx *duktape.Context) int {
var addr common.Address
if ptr, size := ctx.GetBuffer(-1); ptr != nil {
@ -335,6 +351,20 @@ func NewJavascriptTracer(code string) (*JavascriptTracer, error) {
copy(makeSlice(ctx.PushFixedBuffer(20), 20), addr[:])
return 1
})
tracer.vm.PushGlobalGoFunction("toContract", func(ctx *duktape.Context) int {
var from common.Address
if ptr, size := ctx.GetBuffer(-2); ptr != nil {
from = common.BytesToAddress(makeSlice(ptr, size))
} else {
from = common.HexToAddress(ctx.GetString(-2))
}
nonce := uint64(ctx.GetInt(-1))
ctx.Pop2()
contract := crypto.CreateAddress(from, nonce)
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)
@ -414,14 +444,14 @@ func NewJavascriptTracer(code string) (*JavascriptTracer, error) {
}
// Stop terminates execution of the tracer at the first opportune moment.
func (jst *JavascriptTracer) Stop(err error) {
func (jst *Tracer) 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 *JavascriptTracer) call(method string, args ...string) (json.RawMessage, error) {
func (jst *Tracer) call(method string, args ...string) (json.RawMessage, error) {
// Execute the JavaScript call and return any error
jst.vm.PushString(method)
for _, arg := range args {
@ -448,7 +478,7 @@ func wrapError(context string, err error) error {
}
// CaptureStart implements the Tracer interface to initialize the tracing operation.
func (jst *JavascriptTracer) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
func (jst *Tracer) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
jst.ctx["type"] = "CALL"
if create {
jst.ctx["type"] = "CREATE"
@ -463,7 +493,7 @@ func (jst *JavascriptTracer) CaptureStart(from common.Address, to common.Address
}
// CaptureState implements the Tracer interface to trace a single step of VM execution.
func (jst *JavascriptTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
func (jst *Tracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
if jst.err == nil {
// Initialize the context if it wasn't done yet
if !jst.inited {
@ -501,7 +531,7 @@ func (jst *JavascriptTracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode,
// CaptureFault implements the Tracer interface to trace an execution fault
// while running an opcode.
func (jst *JavascriptTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
func (jst *Tracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
if jst.err == nil {
// Apart from the error, everything matches the previous invocation
jst.errorValue = new(string)
@ -516,7 +546,7 @@ func (jst *JavascriptTracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode,
}
// CaptureEnd is called after the call finishes to finalize the tracing.
func (jst *JavascriptTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
func (jst *Tracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
jst.ctx["output"] = output
jst.ctx["gasUsed"] = gasUsed
jst.ctx["time"] = t.String()
@ -528,7 +558,7 @@ func (jst *JavascriptTracer) CaptureEnd(output []byte, gasUsed uint64, t time.Du
}
// GetResult calls the Javascript 'result' function and returns its value, or any accumulated error
func (jst *JavascriptTracer) GetResult() (json.RawMessage, error) {
func (jst *Tracer) GetResult() (json.RawMessage, error) {
// Transform the context into a JavaScript object and inject into the state
obj := jst.vm.PushObject()

14
internal/ethapi/tracer_test.go → eth/tracers/tracer_test.go
View file

@ -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/>.
package ethapi
package tracers
import (
"bytes"
@ -43,7 +43,7 @@ func (account) ReturnGas(*big.Int) {}
func (account) SetCode(common.Hash, []byte) {}
func (account) ForEachStorage(cb func(key, value common.Hash) bool) {}
func runTrace(tracer *JavascriptTracer) (json.RawMessage, error) {
func runTrace(tracer *Tracer) (json.RawMessage, error) {
env := vm.NewEVM(vm.Context{BlockNumber: big.NewInt(1)}, nil, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})
contract := vm.NewContract(account{}, account{}, big.NewInt(0), 10000)
@ -57,7 +57,7 @@ func runTrace(tracer *JavascriptTracer) (json.RawMessage, error) {
}
func TestTracing(t *testing.T) {
tracer, err := NewJavascriptTracer("{count: 0, step: function() { this.count += 1; }, fault: function() {}, result: function() { return this.count; }}")
tracer, err := New("{count: 0, step: function() { this.count += 1; }, fault: function() {}, result: function() { return this.count; }}")
if err != nil {
t.Fatal(err)
}
@ -72,7 +72,7 @@ func TestTracing(t *testing.T) {
}
func TestStack(t *testing.T) {
tracer, err := NewJavascriptTracer("{depths: [], step: function(log) { this.depths.push(log.stack.length()); }, fault: function() {}, result: function() { return this.depths; }}")
tracer, err := New("{depths: [], step: function(log) { this.depths.push(log.stack.length()); }, fault: function() {}, result: function() { return this.depths; }}")
if err != nil {
t.Fatal(err)
}
@ -87,7 +87,7 @@ func TestStack(t *testing.T) {
}
func TestOpcodes(t *testing.T) {
tracer, err := NewJavascriptTracer("{opcodes: [], step: function(log) { this.opcodes.push(log.op.toString()); }, fault: function() {}, result: function() { return this.opcodes; }}")
tracer, err := New("{opcodes: [], step: function(log) { this.opcodes.push(log.op.toString()); }, fault: function() {}, result: function() { return this.opcodes; }}")
if err != nil {
t.Fatal(err)
}
@ -105,7 +105,7 @@ func TestHalt(t *testing.T) {
t.Skip("duktape doesn't support abortion")
timeout := errors.New("stahp")
tracer, err := NewJavascriptTracer("{step: function() { while(1); }, result: function() { return null; }}")
tracer, err := New("{step: function() { while(1); }, result: function() { return null; }}")
if err != nil {
t.Fatal(err)
}
@ -121,7 +121,7 @@ func TestHalt(t *testing.T) {
}
func TestHaltBetweenSteps(t *testing.T) {
tracer, err := NewJavascriptTracer("{step: function() {}, fault: function() {}, result: function() { return null; }}")
tracer, err := New("{step: function() {}, fault: function() {}, result: function() { return null; }}")
if err != nil {
t.Fatal(err)
}

22
eth/tracers/tracers.go
View file

@ -27,23 +27,25 @@ import (
// all contains all the built in JavaScript tracers by name.
var all = make(map[string]string)
// camel converts a snake cased input string into a camel cased output.
func camel(str string) string {
pieces := strings.Split(str, "_")
for i := 1; i < len(pieces); i++ {
pieces[i] = string(unicode.ToUpper(rune(pieces[i][0]))) + pieces[i][1:]
}
return strings.Join(pieces, "")
}
// init retrieves the JavaScript transaction tracers included in go-ethereum.
func init() {
for _, file := range tracers.AssetNames() {
// Convert the underscored tracer file name into a camelcase tracer name
pieces := strings.Split(strings.TrimSuffix(file, ".js"), "_")
for i := 1; i < len(pieces); i++ {
pieces[i] = string(unicode.ToUpper(rune(pieces[i][0]))) + pieces[i][1:]
}
name := strings.Join(pieces, "")
// Retrieve and store the tracer
name := camel(strings.TrimSuffix(file, ".js"))
all[name] = string(tracers.MustAsset(file))
}
}
// Tracer retrieves a specific JavaScript tracer by name.
func Tracer(name string) (string, bool) {
// tracer retrieves a specific JavaScript tracer by name.
func tracer(name string) (string, bool) {
if tracer, ok := all[name]; ok {
return tracer, true
}

194
eth/tracers/tracers_test.go Normal file
View file

@ -0,0 +1,194 @@
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// 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/>.
package tracers
import (
"encoding/json"
"io/ioutil"
"math/big"
"path/filepath"
"reflect"
"strings"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
"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/ethdb"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/tests"
)
// To generate a new callTracer test, copy paste the makeTest method below into
// a Geth console and call it with a transaction hash you which to export.
/*
// makeTest generates a callTracer test by running a prestate reassembled and a
// call trace run, assembling all the gathered information into a test case.
var makeTest = function(tx, rewind) {
// Generate the genesis block from the block, transaction and prestate data
var block = eth.getBlock(eth.getTransaction(tx).blockHash);
var genesis = eth.getBlock(block.parentHash);
delete genesis.gasUsed;
delete genesis.logsBloom;
delete genesis.parentHash;
delete genesis.receiptsRoot;
delete genesis.sha3Uncles;
delete genesis.size;
delete genesis.transactions;
delete genesis.transactionsRoot;
delete genesis.uncles;
genesis.gasLimit = genesis.gasLimit.toString();
genesis.number = genesis.number.toString();
genesis.timestamp = genesis.timestamp.toString();
genesis.alloc = debug.traceTransaction(tx, {tracer: "prestateTracer", rewind: rewind});
for (var key in genesis.alloc) {
genesis.alloc[key].nonce = genesis.alloc[key].nonce.toString();
}
genesis.config = admin.nodeInfo.protocols.eth.config;
// Generate the call trace and produce the test input
var result = debug.traceTransaction(tx, {tracer: "callTracer", rewind: rewind});
delete result.time;
console.log(JSON.stringify({
genesis: genesis,
context: {
number: block.number.toString(),
difficulty: block.difficulty,
timestamp: block.timestamp.toString(),
gasLimit: block.gasLimit.toString(),
miner: block.miner,
},
input: eth.getRawTransaction(tx),
result: result,
}, null, 2));
}
*/
// callTrace is the result of a callTracer run.
type callTrace struct {
Type string `json:"type"`
From common.Address `json:"from"`
To common.Address `json:"to"`
Input hexutil.Bytes `json:"input"`
Output hexutil.Bytes `json:"output"`
Gas *hexutil.Uint64 `json:"gas,omitempty"`
GasUsed *hexutil.Uint64 `json:"gasUsed,omitempty"`
Value *hexutil.Big `json:"value,omitempty"`
Error string `json:"error,omitempty"`
Calls []callTrace `json:"calls,omitempty"`
}
type callContext struct {
Number math.HexOrDecimal64 `json:"number"`
Difficulty *math.HexOrDecimal256 `json:"difficulty"`
Time math.HexOrDecimal64 `json:"timestamp"`
GasLimit math.HexOrDecimal64 `json:"gasLimit"`
Miner common.Address `json:"miner"`
}
// callTracerTest defines a single test to check the call tracer against.
type callTracerTest struct {
Genesis *core.Genesis `json:"genesis"`
Context *callContext `json:"context"`
Input string `json:"input"`
Result *callTrace `json:"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) {
files, err := ioutil.ReadDir("testdata")
if err != nil {
t.Fatalf("failed to retrieve tracer test suite: %v", err)
}
for _, file := range files {
if !strings.HasPrefix(file.Name(), "call_tracer_") {
continue
}
file := file // capture range variable
t.Run(camel(strings.TrimSuffix(strings.TrimPrefix(file.Name(), "call_tracer_"), ".json")), func(t *testing.T) {
t.Parallel()
// Call tracer test found, read if from disk
blob, err := ioutil.ReadFile(filepath.Join("testdata", file.Name()))
if err != nil {
t.Fatalf("failed to read testcase: %v", err)
}
test := new(callTracerTest)
if err := json.Unmarshal(blob, test); err != nil {
t.Fatalf("failed to parse testcase: %v", err)
}
// Configure a blockchain with the given prestate
tx := new(types.Transaction)
if err := rlp.DecodeBytes(common.FromHex(test.Input), tx); err != nil {
t.Fatalf("failed to parse testcase input: %v", err)
}
signer := types.MakeSigner(test.Genesis.Config, new(big.Int).SetUint64(uint64(test.Context.Number)))
origin, _ := signer.Sender(tx)
context := vm.Context{
CanTransfer: core.CanTransfer,
Transfer: core.Transfer,
Origin: origin,
Coinbase: test.Context.Miner,
BlockNumber: new(big.Int).SetUint64(uint64(test.Context.Number)),
Time: new(big.Int).SetUint64(uint64(test.Context.Time)),
Difficulty: (*big.Int)(test.Context.Difficulty),
GasLimit: new(big.Int).SetUint64(uint64(test.Context.GasLimit)),
GasPrice: tx.GasPrice(),
}
db, _ := ethdb.NewMemDatabase()
statedb := tests.MakePreState(db, test.Genesis.Alloc)
// Create the tracer, the EVM environment and run it
tracer, err := New("callTracer")
if err != nil {
t.Fatalf("failed to create call tracer: %v", err)
}
evm := vm.NewEVM(context, statedb, test.Genesis.Config, 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 := new(callTrace)
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)
}
})
}
}

4
tests/state_test_util.go
View file

@ -127,7 +127,7 @@ func (t *StateTest) Run(subtest StateSubtest, vmconfig vm.Config) (*state.StateD
}
block, _ := t.genesis(config).ToBlock()
db, _ := ethdb.NewMemDatabase()
statedb := makePreState(db, t.json.Pre)
statedb := MakePreState(db, t.json.Pre)
post := t.json.Post[subtest.Fork][subtest.Index]
msg, err := t.json.Tx.toMessage(post)
@ -158,7 +158,7 @@ func (t *StateTest) gasLimit(subtest StateSubtest) uint64 {
return t.json.Tx.GasLimit[t.json.Post[subtest.Fork][subtest.Index].Indexes.Gas]
}
func makePreState(db ethdb.Database, accounts core.GenesisAlloc) *state.StateDB {
func MakePreState(db ethdb.Database, accounts core.GenesisAlloc) *state.StateDB {
sdb := state.NewDatabase(db)
statedb, _ := state.New(common.Hash{}, sdb)
for addr, a := range accounts {

2
tests/vm_test_util.go
View file

@ -80,7 +80,7 @@ type vmExecMarshaling struct {
func (t *VMTest) Run(vmconfig vm.Config) error {
db, _ := ethdb.NewMemDatabase()
statedb := makePreState(db, t.json.Pre)
statedb := MakePreState(db, t.json.Pre)
ret, gasRemaining, err := t.exec(statedb, vmconfig)
if t.json.GasRemaining == nil {