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cmd/utils, rpc/comms: stop XEth when IPC connection ends 

There are a bunch of changes required to make this work:

- in miner: allow unregistering agents, fix RemoteAgent.Stop
- in eth/filters: make FilterSystem.Stop not crash
- in rpc/comms: move listen loop to platform-independent code

Fixes #1930. I ran the shell loop there for a few minutes and didn't see
any changes in the memory profile.
This commit is contained in:
Felix Lange 2015-10-29 13:28:00 +01:00
parent 56f8699a6c
commit fbdb44dcc1
9 changed files with 129 additions and 159 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
cmd/utils/flags.go
View File

@ -627,17 +627,14 @@ func StartIPC(eth *eth.Ethereum, ctx *cli.Context) error {
Endpoint: IpcSocketPath(ctx),
}
initializer := func(conn net.Conn) (shared.EthereumApi, error) {
initializer := func(conn net.Conn) (comms.Stopper, shared.EthereumApi, error) {
fe := useragent.NewRemoteFrontend(conn, eth.AccountManager())
xeth := xeth.New(eth, fe)
codec := codec.JSON
apis, err := api.ParseApiString(ctx.GlobalString(IPCApiFlag.Name), codec, xeth, eth)
apis, err := api.ParseApiString(ctx.GlobalString(IPCApiFlag.Name), codec.JSON, xeth, eth)
if err != nil {
return nil, err
return nil, nil, err
}
return api.Merge(apis...), nil
return xeth, api.Merge(apis...), nil
}
return comms.StartIpc(config, codec.JSON, initializer)

92
eth/filters/filter_system.go
View File

@ -31,30 +31,32 @@ import (
// block, transaction and log events. The Filtering system can be used to listen
// for specific LOG events fired by the EVM (Ethereum Virtual Machine).
type FilterSystem struct {
eventMux *event.TypeMux
filterMu sync.RWMutex
filterId int
filters map[int]*Filter
created map[int]time.Time
quit chan struct{}
sub event.Subscription
}
// NewFilterSystem returns a newly allocated filter manager
func NewFilterSystem(mux *event.TypeMux) *FilterSystem {
fs := &FilterSystem{
eventMux: mux,
filters: make(map[int]*Filter),
created: make(map[int]time.Time),
filters: make(map[int]*Filter),
created: make(map[int]time.Time),
}
fs.sub = mux.Subscribe(
//core.PendingBlockEvent{},
core.ChainEvent{},
core.TxPreEvent{},
vm.Logs(nil),
)
go fs.filterLoop()
return fs
}
// Stop quits the filter loop required for polling events
func (fs *FilterSystem) Stop() {
close(fs.quit)
fs.sub.Unsubscribe()
}
// Add adds a filter to the filter manager
@ -89,57 +91,37 @@ func (fs *FilterSystem) Get(id int) *Filter {
// filterLoop waits for specific events from ethereum and fires their handlers
// when the filter matches the requirements.
func (fs *FilterSystem) filterLoop() {
// Subscribe to events
eventCh := fs.eventMux.Subscribe(
//core.PendingBlockEvent{},
core.ChainEvent{},
core.TxPreEvent{},
vm.Logs(nil),
).Chan()
out:
for {
select {
case <-fs.quit:
break out
case event, ok := <-eventCh:
if !ok {
// Event subscription closed, set the channel to nil to stop spinning
eventCh = nil
continue
for event := range fs.sub.Chan() {
switch ev := event.Data.(type) {
case core.ChainEvent:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.BlockCallback != nil && fs.created[id].Before(event.Time) {
filter.BlockCallback(ev.Block, ev.Logs)
}
}
// A real event arrived, notify the registered filters
switch ev := event.Data.(type) {
case core.ChainEvent:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.BlockCallback != nil && fs.created[id].Before(event.Time) {
filter.BlockCallback(ev.Block, ev.Logs)
}
}
fs.filterMu.RUnlock()
fs.filterMu.RUnlock()
case core.TxPreEvent:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.TransactionCallback != nil && fs.created[id].Before(event.Time) {
filter.TransactionCallback(ev.Tx)
}
case core.TxPreEvent:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.TransactionCallback != nil && fs.created[id].Before(event.Time) {
filter.TransactionCallback(ev.Tx)
}
fs.filterMu.RUnlock()
case vm.Logs:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.LogsCallback != nil && fs.created[id].Before(event.Time) {
msgs := filter.FilterLogs(ev)
if len(msgs) > 0 {
filter.LogsCallback(msgs)
}
}
}
fs.filterMu.RUnlock()
}
fs.filterMu.RUnlock()
case vm.Logs:
fs.filterMu.RLock()
for id, filter := range fs.filters {
if filter.LogsCallback != nil && fs.created[id].Before(event.Time) {
msgs := filter.FilterLogs(ev)
if len(msgs) > 0 {
filter.LogsCallback(msgs)
}
}
}
fs.filterMu.RUnlock()
}
}
}

7
miner/miner.go
View File

@ -133,10 +133,13 @@ func (self *Miner) Register(agent Agent) {
if self.Mining() {
agent.Start()
}
self.worker.register(agent)
}
func (self *Miner) Unregister(agent Agent) {
self.worker.unregister(agent)
}
func (self *Miner) Mining() bool {
return atomic.LoadInt32(&self.mining) > 0
}
@ -146,7 +149,7 @@ func (self *Miner) HashRate() (tot int64) {
// do we care this might race? is it worth we're rewriting some
// aspects of the worker/locking up agents so we can get an accurate
// hashrate?
for _, agent := range self.worker.agents {
for agent := range self.worker.agents {
tot += agent.GetHashRate()
}
return

15
miner/remote_agent.go
View File

@ -48,9 +48,10 @@ type RemoteAgent struct {
}
func NewRemoteAgent() *RemoteAgent {
agent := &RemoteAgent{work: make(map[common.Hash]*Work), hashrate: make(map[common.Hash]hashrate)}
return agent
return &RemoteAgent{
work: make(map[common.Hash]*Work),
hashrate: make(map[common.Hash]hashrate),
}
}
func (a *RemoteAgent) SubmitHashrate(id common.Hash, rate uint64) {
@ -75,8 +76,12 @@ func (a *RemoteAgent) Start() {
}
func (a *RemoteAgent) Stop() {
close(a.quit)
close(a.workCh)
if a.quit != nil {
close(a.quit)
}
if a.workCh != nil {
close(a.workCh)
}
}
// GetHashRate returns the accumulated hashrate of all identifier combined

30
miner/worker.go
View File

@ -92,7 +92,7 @@ type Result struct {
type worker struct {
mu sync.Mutex
agents []Agent
agents map[Agent]struct{}
recv chan *Result
mux *event.TypeMux
quit chan struct{}
@ -136,6 +136,7 @@ func newWorker(coinbase common.Address, eth core.Backend) *worker {
coinbase: coinbase,
txQueue: make(map[common.Hash]*types.Transaction),
quit: make(chan struct{}),
agents: make(map[Agent]struct{}),
fullValidation: false,
}
go worker.update()
@ -180,7 +181,7 @@ func (self *worker) start() {
atomic.StoreInt32(&self.mining, 1)
// spin up agents
for _, agent := range self.agents {
for agent := range self.agents {
agent.Start()
}
}
@ -190,16 +191,14 @@ func (self *worker) stop() {
defer self.mu.Unlock()
if atomic.LoadInt32(&self.mining) == 1 {
var keep []Agent
// stop all agents
for _, agent := range self.agents {
// Stop all agents.
for agent := range self.agents {
agent.Stop()
// keep all that's not a cpu agent
if _, ok := agent.(*CpuAgent); !ok {
keep = append(keep, agent)
// Remove CPU agents.
if _, ok := agent.(*CpuAgent); ok {
delete(self.agents, agent)
}
}
self.agents = keep
}
atomic.StoreInt32(&self.mining, 0)
@ -209,10 +208,17 @@ func (self *worker) stop() {
func (self *worker) register(agent Agent) {
self.mu.Lock()
defer self.mu.Unlock()
self.agents = append(self.agents, agent)
self.agents[agent] = struct{}{}
agent.SetReturnCh(self.recv)
}
func (self *worker) unregister(agent Agent) {
self.mu.Lock()
defer self.mu.Unlock()
delete(self.agents, agent)
agent.Stop()
}
func (self *worker) update() {
eventSub := self.mux.Subscribe(core.ChainHeadEvent{}, core.ChainSideEvent{}, core.TxPreEvent{})
defer eventSub.Unsubscribe()
@ -341,11 +347,9 @@ func (self *worker) push(work *Work) {
glog.Infoln("You turn back and abort mining")
return
}
// push new work to agents
for _, agent := range self.agents {
for agent := range self.agents {
atomic.AddInt32(&self.atWork, 1)
if agent.Work() != nil {
agent.Work() <- work
}

43
rpc/comms/ipc.go
View File

@ -20,13 +20,22 @@ import (
"fmt"
"math/rand"
"net"
"os"
"encoding/json"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/shared"
)
type Stopper interface {
Stop()
}
type InitFunc func(conn net.Conn) (Stopper, shared.EthereumApi, error)
type IpcConfig struct {
Endpoint string
}
@ -90,8 +99,38 @@ func NewIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
}
// Start IPC server
func StartIpc(cfg IpcConfig, codec codec.Codec, initializer func(conn net.Conn) (shared.EthereumApi, error)) error {
return startIpc(cfg, codec, initializer)
func StartIpc(cfg IpcConfig, codec codec.Codec, initializer InitFunc) error {
l, err := ipcListen(cfg)
if err != nil {
return err
}
go ipcLoop(cfg, codec, initializer, l)
return nil
}
func ipcLoop(cfg IpcConfig, codec codec.Codec, initializer InitFunc, l net.Listener) {
glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)
defer os.Remove(cfg.Endpoint)
defer l.Close()
for {
conn, err := l.Accept()
if err != nil {
glog.V(logger.Debug).Infof("accept: %v", err)
return
}
id := newIpcConnId()
go func() {
defer conn.Close()
glog.V(logger.Debug).Infof("new connection with id %06d started", id)
stopper, api, err := initializer(conn)
if err != nil {
glog.V(logger.Error).Infof("Unable to initialize IPC connection: %v", err)
return
}
defer stopper.Stop()
handle(id, conn, api, codec)
}()
}
}
func newIpcConnId() int {

40
rpc/comms/ipc_unix.go
View File

@ -23,8 +23,6 @@ import (
"os"
"path/filepath"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/ethereum/go-ethereum/rpc/useragent"
@ -69,44 +67,16 @@ func (self *ipcClient) reconnect() error {
return err
}
func startIpc(cfg IpcConfig, codec codec.Codec, initializer func(conn net.Conn) (shared.EthereumApi, error)) error {
func ipcListen(cfg IpcConfig) (net.Listener, error) {
// Ensure the IPC path exists and remove any previous leftover
if err := os.MkdirAll(filepath.Dir(cfg.Endpoint), 0751); err != nil {
return err
return nil, err
}
os.Remove(cfg.Endpoint)
l, err := net.ListenUnix("unix", &net.UnixAddr{Name: cfg.Endpoint, Net: "unix"})
l, err := net.Listen("unix", cfg.Endpoint)
if err != nil {
return err
return nil, err
}
os.Chmod(cfg.Endpoint, 0600)
go func() {
for {
conn, err := l.AcceptUnix()
if err != nil {
glog.V(logger.Error).Infof("Error accepting ipc connection - %v\n", err)
continue
}
id := newIpcConnId()
glog.V(logger.Debug).Infof("New IPC connection with id %06d started\n", id)
api, err := initializer(conn)
if err != nil {
glog.V(logger.Error).Infof("Unable to initialize IPC connection - %v\n", err)
conn.Close()
continue
}
go handle(id, conn, api, codec)
}
os.Remove(cfg.Endpoint)
}()
glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)
return nil
return l, nil
}

36
rpc/comms/ipc_windows.go
View File

@ -28,8 +28,6 @@ import (
"time"
"unsafe"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/ethereum/go-ethereum/rpc/useragent"
@ -688,40 +686,12 @@ func (self *ipcClient) reconnect() error {
return err
}
func startIpc(cfg IpcConfig, codec codec.Codec, initializer func(conn net.Conn) (shared.EthereumApi, error)) error {
func ipcListen(cfg IpcConfig) (net.Listener, error) {
os.Remove(cfg.Endpoint) // in case it still exists from a previous run
l, err := Listen(cfg.Endpoint)
if err != nil {
return err
return nil, err
}
os.Chmod(cfg.Endpoint, 0600)
go func() {
for {
conn, err := l.Accept()
if err != nil {
glog.V(logger.Error).Infof("Error accepting ipc connection - %v\n", err)
continue
}
id := newIpcConnId()
glog.V(logger.Debug).Infof("New IPC connection with id %06d started\n", id)
api, err := initializer(conn)
if err != nil {
glog.V(logger.Error).Infof("Unable to initialize IPC connection - %v\n", err)
conn.Close()
continue
}
go handle(id, conn, api, codec)
}
os.Remove(cfg.Endpoint)
}()
glog.V(logger.Info).Infof("IPC service started (%s)\n", cfg.Endpoint)
return nil
return l, nil
}

14
xeth/xeth.go
View File

@ -113,19 +113,15 @@ func New(ethereum *eth.Ethereum, frontend Frontend) *XEth {
if frontend == nil {
xeth.frontend = dummyFrontend{}
}
state, err := xeth.backend.BlockChain().State()
if err != nil {
return nil
}
state, _ := xeth.backend.BlockChain().State()
xeth.state = NewState(xeth, state)
go xeth.start()
return xeth
}
func (self *XEth) start() {
timer := time.NewTicker(2 * time.Second)
defer timer.Stop()
done:
for {
select {
@ -171,8 +167,12 @@ done:
}
}
func (self *XEth) stop() {
// Stop releases any resources associated with self.
// It may not be called more than once.
func (self *XEth) Stop() {
close(self.quit)
self.filterManager.Stop()
self.backend.Miner().Unregister(self.agent)
}
func cAddress(a []string) []common.Address {