// SetSync controls synchronous event mode. When set to true, a function call
// to generate an event does not return until the event has been processed.
func (logger *Logger) SetSync(enabled bool) {
if enabled {
atomic.StoreUint32(&logger.syncEnabled, 1)
} else {
atomic.StoreUint32(&logger.syncEnabled, 0)
}
}
func (c *conf) setBinaryOption(opt *uint32, value bool) {
if value {
atomic.StoreUint32(opt, 1)
return
}
atomic.StoreUint32(opt, 0)
}
// Wait waits for the queue to finish processing all transfers. Once Wait is
// called, Add will no longer add transferables to the queue. Any failed
// transfers will be automatically retried once.
func (q *TransferQueue) Wait() {
if q.batcher != nil {
q.batcher.Exit()
}
q.wait.Wait()
// Handle any retries
close(q.retriesc)
q.retrywait.Wait()
atomic.StoreUint32(&q.retrying, 1)
if len(q.retries) > 0 && q.batcher != nil {
tracerx.Printf("tq: retrying %d failed transfers", len(q.retries))
for _, t := range q.retries {
q.Add(t)
}
q.batcher.Exit()
q.wait.Wait()
}
atomic.StoreUint32(&q.retrying, 0)
close(q.apic)
close(q.transferc)
close(q.errorc)
for _, watcher := range q.watchers {
close(watcher)
}
q.meter.Finish()
q.errorwait.Wait()
}
func testThrottling(t *testing.T, protocol int) {
// Create a long block chain to download and the tester
targetBlocks := 8 * blockCacheLimit
hashes, blocks := makeChain(targetBlocks, 0, genesis)
tester := newTester()
tester.newPeer("peer", protocol, hashes, blocks)
// Wrap the importer to allow stepping
blocked, proceed := uint32(0), make(chan struct{})
tester.downloader.chainInsertHook = func(blocks []*Block) {
atomic.StoreUint32(&blocked, uint32(len(blocks)))
<-proceed
}
// Start a synchronisation concurrently
errc := make(chan error)
go func() {
errc <- tester.sync("peer", nil)
}()
// Iteratively take some blocks, always checking the retrieval count
for {
// Check the retrieval count synchronously (! reason for this ugly block)
tester.lock.RLock()
retrieved := len(tester.ownBlocks)
tester.lock.RUnlock()
if retrieved >= targetBlocks+1 {
break
}
// Wait a bit for sync to throttle itself
var cached int
for start := time.Now(); time.Since(start) < time.Second; {
time.Sleep(25 * time.Millisecond)
tester.downloader.queue.lock.RLock()
cached = len(tester.downloader.queue.blockPool)
tester.downloader.queue.lock.RUnlock()
if cached == blockCacheLimit || len(tester.ownBlocks)+cached+int(atomic.LoadUint32(&blocked)) == targetBlocks+1 {
break
}
}
// Make sure we filled up the cache, then exhaust it
time.Sleep(25 * time.Millisecond) // give it a chance to screw up
if cached != blockCacheLimit && len(tester.ownBlocks)+cached+int(atomic.LoadUint32(&blocked)) != targetBlocks+1 {
t.Fatalf("block count mismatch: have %v, want %v (owned %v, target %v)", cached, blockCacheLimit, len(tester.ownBlocks), targetBlocks+1)
}
// Permit the blocked blocks to import
if atomic.LoadUint32(&blocked) > 0 {
atomic.StoreUint32(&blocked, uint32(0))
proceed <- struct{}{}
}
}
// Check that we haven't pulled more blocks than available
if len(tester.ownBlocks) > targetBlocks+1 {
t.Fatalf("target block count mismatch: have %v, want %v", len(tester.ownBlocks), targetBlocks+1)
}
if err := <-errc; err != nil {
t.Fatalf("block synchronization failed: %v", err)
}
}
func (b *Bool) Set(v bool) {
if v {
atomic.StoreUint32(&b.v, 1)
return
}
atomic.StoreUint32(&b.v, 0)
}
func SetAllHeadersDone(res bool) {
if res {
atomic.StoreUint32(&allheadersdone, 1)
} else {
atomic.StoreUint32(&allheadersdone, 0)
}
}
func (j *Job) Run() {
// If the job panics, just print a stack trace.
// Don't let the whole process die.
defer func() {
if err := recover(); err != nil {
if revelError := revel.NewErrorFromPanic(err); revelError != nil {
revel.ERROR.Print(err, "\n", revelError.Stack)
} else {
revel.ERROR.Print(err, "\n", string(debug.Stack()))
}
}
}()
if !selfConcurrent {
j.running.Lock()
defer j.running.Unlock()
}
if workPermits != nil {
workPermits <- struct{}{}
defer func() { <-workPermits }()
}
atomic.StoreUint32(&j.status, 1)
defer atomic.StoreUint32(&j.status, 0)
j.inner.Run()
}
// Switches between startup (fast) and maintenance (slow) sampling speeds.
func (b *Bootstrapper) SetMode(startup bool) {
if startup {
atomic.StoreUint32(&b.phase, uint32(0))
} else {
atomic.StoreUint32(&b.phase, uint32(1))
}
}
// EnableDebugLogs has log messages directed to standard output if enable is true.
func EnableDebugLogs(enable bool) {
if enable {
atomic.StoreUint32(&enableDebugLogs, 1)
} else {
atomic.StoreUint32(&enableDebugLogs, 0)
}
}
// Call invokes the (constant) contract method with params as input values and
// sets the output to result. The result type might be a single field for simple
// returns, a slice of interfaces for anonymous returns and a struct for named
// returns.
func (c *BoundContract) Call(opts *CallOpts, result interface{}, method string, params ...interface{}) error {
// Don't crash on a lazy user
if opts == nil {
opts = new(CallOpts)
}
// Make sure we have a contract to operate on, and bail out otherwise
if (opts.Pending && atomic.LoadUint32(&c.pendingHasCode) == 0) || (!opts.Pending && atomic.LoadUint32(&c.latestHasCode) == 0) {
if code, err := c.caller.HasCode(c.address, opts.Pending); err != nil {
return err
} else if !code {
return ErrNoCode
}
if opts.Pending {
atomic.StoreUint32(&c.pendingHasCode, 1)
} else {
atomic.StoreUint32(&c.latestHasCode, 1)
}
}
// Pack the input, call and unpack the results
input, err := c.abi.Pack(method, params...)
if err != nil {
return err
}
output, err := c.caller.ContractCall(c.address, input, opts.Pending)
if err != nil {
return err
}
return c.abi.Unpack(result, method, output)
}
func (j *Job) Run() {
start := time.Now()
// If the job panics, just print a stack trace.
// Don't let the whole process die.
defer func() {
if err := recover(); err != nil {
var buf bytes.Buffer
logger := log.New(&buf, "JobRunner Log: ", log.Lshortfile)
logger.Panic(err, "\n", string(debug.Stack()))
}
}()
if !selfConcurrent {
j.running.Lock()
defer j.running.Unlock()
}
if workPermits != nil {
workPermits <- struct{}{}
defer func() { <-workPermits }()
}
atomic.StoreUint32(&j.status, 1)
j.StatusUpdate()
defer j.StatusUpdate()
defer atomic.StoreUint32(&j.status, 0)
j.inner.Run()
end := time.Now()
j.Latency = end.Sub(start).String()
}
// synchronise tries to sync up our local block chain with a remote peer.
func (pm *ProtocolManager) synchronise(peer *peer) {
// Short circuit if no peers are available
if peer == nil {
return
}
// Make sure the peer's TD is higher than our own
currentBlock := pm.blockchain.CurrentBlock()
td := pm.blockchain.GetTd(currentBlock.Hash())
pHead, pTd := peer.Head()
if pTd.Cmp(td) <= 0 {
return
}
// Otherwise try to sync with the downloader
mode := downloader.FullSync
if atomic.LoadUint32(&pm.fastSync) == 1 {
mode = downloader.FastSync
}
if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil {
return
}
atomic.StoreUint32(&pm.synced, 1) // Mark initial sync done
// If fast sync was enabled, and we synced up, disable it
if atomic.LoadUint32(&pm.fastSync) == 1 {
// Disable fast sync if we indeed have something in our chain
if pm.blockchain.CurrentBlock().NumberU64() > 0 {
glog.V(logger.Info).Infof("fast sync complete, auto disabling")
atomic.StoreUint32(&pm.fastSync, 0)
}
}
}
func updateNow() {
t := time.Now()
dt := uint32(t.Year()%100*10000 + int(t.Month())*100 + t.Day())
tm := uint32(t.Hour()*10000 + t.Minute()*100 + t.Second())
atomic.StoreUint32(&lastDate, dt)
atomic.StoreUint32(&lastTime, tm)
lastDateTimeStr = fmt.Sprintf("%04d %06d", dt%10000, tm)
}
// Toggle enables or disables logging.
func (el *ErrLog) Toggle(toggle bool) {
el32 := unsafe.Pointer(el)
if toggle {
atomic.StoreUint32((*uint32)(el32), 1)
} else {
atomic.StoreUint32((*uint32)(el32), 0)
}
}
// Get returns buffer with length of n.
func (p *BufferPool) Get(n int) []byte {
atomic.AddUint32(&p.get, 1)
if poolNum := p.poolNum(n); poolNum == 0 {
// Fast path.
if b, ok := p.pool[0].Get().([]byte); ok {
switch {
case cap(b) > n:
atomic.AddUint32(&p.less, 1)
return b[:n]
case cap(b) == n:
atomic.AddUint32(&p.equal, 1)
return b[:n]
default:
panic("not reached")
}
} else {
atomic.AddUint32(&p.miss, 1)
}
return make([]byte, n, p.baseline0)
} else {
sizePtr := &p.size[poolNum-1]
if b, ok := p.pool[poolNum].Get().([]byte); ok {
switch {
case cap(b) > n:
atomic.AddUint32(&p.less, 1)
return b[:n]
case cap(b) == n:
atomic.AddUint32(&p.equal, 1)
return b[:n]
default:
atomic.AddUint32(&p.greater, 1)
if uint32(cap(b)) >= atomic.LoadUint32(sizePtr) {
p.pool[poolNum].Put(b)
}
}
} else {
atomic.AddUint32(&p.miss, 1)
}
if size := atomic.LoadUint32(sizePtr); uint32(n) > size {
if size == 0 {
atomic.CompareAndSwapUint32(sizePtr, 0, uint32(n))
} else {
sizeMissPtr := &p.sizeMiss[poolNum-1]
if atomic.AddUint32(sizeMissPtr, 1) == 20 {
atomic.StoreUint32(sizePtr, uint32(n))
atomic.StoreUint32(sizeMissPtr, 0)
}
}
return make([]byte, n)
} else {
return make([]byte, n, size)
}
}
}
// Сollect start when we create new Rps instance.
// Еvery second update rps and set countre = 0
func (rc *Rps) collect() {
for {
select {
case <-rc.ticker:
atomic.StoreUint32(rc.rps, atomic.LoadUint32(rc.count))
atomic.StoreUint32(rc.count, 0)
}
}
}
func SetListenTCP(yes bool, global bool) {
if yes {
atomic.StoreUint32(&listen_tcp, 1)
} else {
atomic.StoreUint32(&listen_tcp, 0)
}
if global {
// Make sure mutex_cfg is locked while calling this one
CFG.Net.ListenTCP = yes
}
}
func SetListenTCP(yes bool, global bool) {
if yes {
atomic.StoreUint32(&listen_tcp, 1)
} else {
atomic.StoreUint32(&listen_tcp, 0)
}
if global {
mutex_cfg.Lock()
CFG.Net.ListenTCP = yes
mutex_cfg.Unlock()
}
}
// Update a given pool from an etcd notification.
func (m *Manager) updatePool(node *etcd.Node) {
pool := m.getPool(node.Key[1:])
if pool == nil {
return // We're not monitoring this domain, nothing to be done
}
pool.Lock()
defer pool.Unlock()
// Init the host pool with new hosts
hosts := strings.Split(node.Value, "|")
pool.hosts.Assign(hosts)
// For each new host, create a peer connection if it doesn't exist yet
for _, host := range hosts {
if peer := pool.peers[host]; peer != nil {
atomic.StoreUint32(&peer.shutdown, 0)
} else {
peer := &Peer{
shutdown: 0,
reconnect: 0,
refCount: 0,
pool: pool,
}
peer.connect(host)
pool.peers[host] = peer
}
}
var del bool
var h string
// For each deleted host, mark it as being shutdown
for host, peer := range pool.peers {
del = true
for _, h = range hosts {
if h == host {
del = false
break
}
}
if del {
atomic.StoreUint32(&peer.shutdown, 1)
}
}
// Notify hosts change
select {
case pool.notif <- 1:
default:
}
}
// WUnlock relinquishes our write lock.
func (l *lock) WUnlock() {
// If more writers attempted our lock, write&^highBit will be >1, and
// the try that got 2 will be waiting in pending state. That waiter
// will now see we have unlocked, so we can leave.
write := atomic.AddUint32(&l.write, highBit)
if write&^highBit > 1 {
return
}
// If nobody else attempted the lock by the time added the high bit,
// we must let readers continue (first) and then reset our write lock.
atomic.StoreUint32(&l.read, 0)
atomic.StoreUint32(&l.write, 0)
}
/*
Grow hash table procedure
old hash table (n buckets) -> new hash table (n*2 buckets)
example:
0 0 0Lock 0 0 0 0
1 1 1 1Lock 1 1 1
2 2 2 2 2Lock 2 2
3 3 3 3 3 3Lock 3
4Lock 4Lock 4 4 4 4
5Lock 5Lock 5Lock 5 5 5
6Lock 6Lock 6Lock 6Lock 6 6
7Lock 7Lock 7Lock 7Lock 7Lock 7
*/
func (t *tCache) grow() {
var (
i, j int
val *TItem
)
oldht := *(*[]*tBucket)(atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&t.t))))
oldlen := len(oldht)
newlen := oldlen << 1
if uint64(newlen) >= math.MaxUint32 {
// grow only singleton runed
atomic.StoreUint32(&t.growlock, 0)
return
}
newht := make([]*tBucket, newlen)
copy(newht, oldht) // possible since it links
for i = oldlen; i < newlen; i++ {
newht[i] = &tBucket{}
newht[i].Lock()
j++
}
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&t.t)), unsafe.Pointer(&newht))
oldht = nil
// rehash
j = oldlen
for i = 0; i < oldlen; i++ {
itemsold := make([]*TItem, 0, initbucketscap)
itemsnew := make([]*TItem, 0, initbucketscap)
newht[i].Lock()
for _, val = range newht[i].items {
if t.keyToID([]byte(val.Key)) == uint32(i) {
itemsold = append(itemsold, val)
} else {
itemsnew = append(itemsnew, val)
}
}
newht[j].items = itemsnew
newht[j].Unlock()
newht[i].items = itemsold
newht[i].Unlock()
j++
}
// grow only singleton runed
atomic.StoreUint32(&t.growlock, 0)
}
// Data size monitor depends on output format of mongodb command, the format is
// united in all of current supported versions, 1.8, 2.0 and 2.2. And we must
// get the data size information from mongodb command interface.
func (filter *ProxyFilterImpl) MonitorQuotaDataSize() {
dbhost := filter.mongo.HOST
port := filter.mongo.PORT
dbname := filter.mongo.DBNAME
user := filter.mongo.USER
pass := filter.mongo.PASS
quota_data_size := filter.config.QUOTA_DATA_SIZE
filter.lock.Lock()
filter.running++
filter.lock.Unlock()
var size float64
for {
event := <-filter.data_size_channel
if event == STOP_EVENT {
break
}
if err := startMongoSession(dbhost, port); err != nil {
logger.Errorf("Failed to connect to %s:%s, [%s].", dbhost, port, err)
goto Error
}
if !readMongodbSize(dbname, user, pass, &size) {
logger.Errorf("Failed to read database '%s' size.", dbname)
goto Error
}
if size >= float64(quota_data_size)*float64(1024*1024) {
logger.Error("Data size exceeds quota.")
atomic.StoreUint32(&filter.mablocked, BLOCKED)
} else {
atomic.StoreUint32(&filter.mablocked, UNBLOCKED)
}
continue
Error:
atomic.StoreUint32(&filter.mablocked, BLOCKED)
}
endMongoSession()
filter.lock.Lock()
filter.running--
if filter.running == 0 {
filter.wait <- STOP_EVENT
}
filter.lock.Unlock()
}
func main() {
flag.Parse()
cfg, _, err := config.Parse(*flagConfig)
if err != nil {
Fatalf("%v", err)
}
if len(flag.Args()) != 1 {
Fatalf("usage: syz-crush -config=config.file execution.log")
}
Logf(0, "booting test machines...")
var shutdown uint32
var wg sync.WaitGroup
wg.Add(cfg.Count + 1)
for i := 0; i < cfg.Count; i++ {
i := i
go func() {
defer wg.Done()
for {
vmCfg, err := config.CreateVMConfig(cfg, i)
if atomic.LoadUint32(&shutdown) != 0 {
break
}
if err != nil {
Fatalf("failed to create VM config: %v", err)
}
runInstance(cfg, vmCfg)
if atomic.LoadUint32(&shutdown) != 0 {
break
}
}
}()
}
go func() {
c := make(chan os.Signal, 2)
signal.Notify(c, syscall.SIGINT)
<-c
wg.Done()
atomic.StoreUint32(&shutdown, 1)
close(vm.Shutdown)
Logf(-1, "shutting down...")
atomic.StoreUint32(&shutdown, 1)
<-c
Fatalf("terminating")
}()
wg.Wait()
}
func (r *RoundRobinPeerSelector) SetMaxLen(m uint32) {
if m > math.MaxUint16 {
log.Panicf("Number of peers %v greater than those suported %v",
m, math.MaxUint16)
}
atomic.StoreUint32(&r.maxLen, m)
}
func (k *KinesisOutput) Write(metrics []telegraf.Metric) error {
var sz uint32 = 0
if len(metrics) == 0 {
return nil
}
r := []*kinesis.PutRecordsRequestEntry{}
for _, p := range metrics {
atomic.AddUint32(&sz, 1)
metric, _ := FormatMetric(k, p)
d := kinesis.PutRecordsRequestEntry{
Data: []byte(metric),
PartitionKey: aws.String(k.PartitionKey),
}
r = append(r, &d)
if sz == 500 {
// Max Messages Per PutRecordRequest is 500
elapsed := writekinesis(k, r)
log.Printf("Wrote a %+v point batch to Kinesis in %+v.\n", sz, elapsed)
atomic.StoreUint32(&sz, 0)
r = nil
}
}
writekinesis(k, r)
return nil
}
// Establishes a new socket connection to the 9P server and creates
// a client object for it. Negotiates the dialect and msize for the
// connection. Returns a Clnt object, or Error.
func Connect(c net.Conn, msize uint32, dotu bool) (*Clnt, error) {
clnt := NewClnt(c, msize, dotu)
ver := "9P2000"
if clnt.Dotu {
ver = "9P2000.u"
}
clntmsize := atomic.LoadUint32(&clnt.Msize)
tc := ninep.NewFcall(clntmsize)
err := ninep.PackTversion(tc, clntmsize, ver)
if err != nil {
return nil, err
}
rc, err := clnt.Rpc(tc)
if err != nil {
return nil, err
}
if rc.Msize < atomic.LoadUint32(&clnt.Msize) {
atomic.StoreUint32(&clnt.Msize, rc.Msize)
}
clnt.Dotu = rc.Version == "9P2000.u" && clnt.Dotu
return clnt, nil
}
func (filter *ProxyFilterImpl) StorageMonitor() {
for {
// FIXME: fake monitor handler
atomic.StoreUint32(&filter.blocked, UNBLOCKED)
time.Sleep(1 * time.Second)
}
}
// Flush writes the content of the buffer to a given resource and resets the
// internal state, i.e. the buffer is empty after a call to Flush.
// Writing will be done in a separate go routine to be non-blocking.
//
// The validate callback will be called after messages have been successfully
// written to the io.Writer.
// If validate returns false the buffer will not be resetted (automatic retry).
// If validate is nil a return value of true is assumed (buffer reset).
//
// The onError callback will be called if the io.Writer returned an error.
// If onError returns false the buffer will not be resetted (automatic retry).
// If onError is nil a return value of true is assumed (buffer reset).
func (batch *MessageBatch) Flush(assemble AssemblyFunc) {
if batch.IsEmpty() {
return // ### return, nothing to do ###
}
// Only one flush at a time
batch.flushing.IncWhenDone()
// Switch the buffers so writers can go on writing
flushSet := atomic.SwapUint32(&batch.activeSet, (batch.activeSet&messageBatchIndexMask)^messageBatchIndexMask)
flushIdx := flushSet >> messageBatchIndexShift
writerCount := flushSet & messageBatchCountMask
flushQueue := &batch.queue[flushIdx]
spin := shared.NewSpinner(shared.SpinPriorityHigh)
// Wait for remaining writers to finish
for writerCount != atomic.LoadUint32(&flushQueue.doneCount) {
spin.Yield()
}
// Write data and reset buffer asynchronously
go shared.DontPanic(func() {
defer batch.flushing.Done()
messageCount := shared.MinI(int(writerCount), len(flushQueue.messages))
assemble(flushQueue.messages[:messageCount])
atomic.StoreUint32(&flushQueue.doneCount, 0)
batch.Touch()
})
}
func TestGoroutineParallelism(t *testing.T) {
P := 4
N := 10
if testing.Short() {
P = 3
N = 3
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(P))
// If runtime triggers a forced GC during this test then it will deadlock,
// since the goroutines can't be stopped/preempted.
// Disable GC for this test (see issue #10958).
defer debug.SetGCPercent(debug.SetGCPercent(-1))
for try := 0; try < N; try++ {
done := make(chan bool)
x := uint32(0)
for p := 0; p < P; p++ {
// Test that all P goroutines are scheduled at the same time
go func(p int) {
for i := 0; i < 3; i++ {
expected := uint32(P*i + p)
for atomic.LoadUint32(&x) != expected {
}
atomic.StoreUint32(&x, expected+1)
}
done <- true
}(p)
}
for p := 0; p < P; p++ {
<-done
}
}
}
func InitEntityStoreMap(dbrSess *dbr.Session) error {
if atomic.LoadUint32(&initMapDone.done) == 1 {
return ErrStoreMapInitialized
}
initMapDone.m.Lock()
defer initMapDone.m.Unlock()
if initMapDone.done == 0 {
defer atomic.StoreUint32(&initMapDone.done, 1)
s, err := TableCollection.Structure(TableIndexEntityStore)
if err != nil {
return errgo.Mask(err)
}
var ess TableEntityStoreSlice
_, err = dbrSess.
Select(s.Columns.FieldNames()...).
From(s.Name).
LoadStructs(&ess)
if err != nil {
return errgo.Mask(err)
}
for _, es := range ess {
EntityStoreMap.Set(es.EntityTypeID, es.StoreID, es)
}
ess = ess[:len(ess)-1] // delete Struct Slice https://code.google.com/p/go-wiki/wiki/SliceTricks
return nil
}
return ErrStoreMapInitialized
}