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[NOD-145] Fixed deadlock in mempool (#268)

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This commit is contained in:
Evgeny Khirin 2019-04-29 11:57:50 +03:00 committed by Svarog
parent 83a012de12
commit 068a8d117d
1 changed files with 11 additions and 9 deletions
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20
mempool/mempool.go
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@ -241,8 +241,8 @@ func (mp *TxPool) removeOrphan(tx *util.Tx, removeRedeemers bool) {
// This function is safe for concurrent access.
func (mp *TxPool) RemoveOrphan(tx *util.Tx) {
mp.mtx.Lock()
defer mp.mtx.Unlock()
mp.removeOrphan(tx, false)
mp.mtx.Unlock()
}
// RemoveOrphansByTag removes all orphan transactions tagged with the provided
@ -252,13 +252,13 @@ func (mp *TxPool) RemoveOrphan(tx *util.Tx) {
func (mp *TxPool) RemoveOrphansByTag(tag Tag) uint64 {
var numEvicted uint64
mp.mtx.Lock()
defer mp.mtx.Unlock()
for _, otx := range mp.orphans {
if otx.tag == tag {
mp.removeOrphan(otx.tx, true)
numEvicted++
}
}
mp.mtx.Unlock()
return numEvicted
}
@ -591,6 +591,7 @@ func (mp *TxPool) RemoveTransaction(tx *util.Tx, removeRedeemers bool, restoreIn
func (mp *TxPool) RemoveDoubleSpends(tx *util.Tx) {
// Protect concurrent access.
mp.mtx.Lock()
defer mp.mtx.Unlock()
for _, txIn := range tx.MsgTx().TxIn {
if txRedeemer, ok := mp.outpoints[txIn.PreviousOutPoint]; ok {
if !txRedeemer.ID().IsEqual(tx.ID()) {
@ -598,7 +599,6 @@ func (mp *TxPool) RemoveDoubleSpends(tx *util.Tx) {
}
}
}
mp.mtx.Unlock()
}
// addTransaction adds the passed transaction to the memory pool. It should
@ -607,8 +607,6 @@ func (mp *TxPool) RemoveDoubleSpends(tx *util.Tx) {
//
// This function MUST be called with the mempool lock held (for writes).
func (mp *TxPool) addTransaction(tx *util.Tx, height int32, fee uint64, parentsInPool []*wire.OutPoint) *TxDesc {
mp.cfg.DAG.RLock()
defer mp.cfg.DAG.RUnlock()
// Add the transaction to the pool and mark the referenced outpoints
// as spent by the pool.
txD := &TxDesc{
@ -717,8 +715,6 @@ func (mp *TxPool) FetchTransaction(txID *daghash.TxID) (*util.Tx, error) {
//
// This function MUST be called with the mempool lock held (for writes).
func (mp *TxPool) maybeAcceptTransaction(tx *util.Tx, isNew, rateLimit, rejectDupOrphans bool) ([]*daghash.TxID, *TxDesc, error) {
mp.cfg.DAG.RLock()
defer mp.cfg.DAG.RUnlock()
txID := tx.ID()
// Don't accept the transaction if it already exists in the pool. This
@ -1011,9 +1007,11 @@ func (mp *TxPool) maybeAcceptTransaction(tx *util.Tx, isNew, rateLimit, rejectDu
// This function is safe for concurrent access.
func (mp *TxPool) MaybeAcceptTransaction(tx *util.Tx, isNew, rateLimit bool) ([]*daghash.TxID, *TxDesc, error) {
// Protect concurrent access.
mp.cfg.DAG.RLock()
defer mp.cfg.DAG.RUnlock()
mp.mtx.Lock()
defer mp.mtx.Unlock()
hashes, txD, err := mp.maybeAcceptTransaction(tx, isNew, rateLimit, true)
mp.mtx.Unlock()
return hashes, txD, err
}
@ -1112,9 +1110,11 @@ func (mp *TxPool) processOrphans(acceptedTx *util.Tx) []*TxDesc {
//
// This function is safe for concurrent access.
func (mp *TxPool) ProcessOrphans(acceptedTx *util.Tx) []*TxDesc {
mp.cfg.DAG.RLock()
defer mp.cfg.DAG.RUnlock()
mp.mtx.Lock()
defer mp.mtx.Unlock()
acceptedTxns := mp.processOrphans(acceptedTx)
mp.mtx.Unlock()
return acceptedTxns
}
@ -1134,6 +1134,8 @@ func (mp *TxPool) ProcessTransaction(tx *util.Tx, allowOrphan, rateLimit bool, t
log.Tracef("Processing transaction %s", tx.ID())
// Protect concurrent access.
mp.cfg.DAG.RLock()
defer mp.cfg.DAG.RUnlock()
mp.mtx.Lock()
defer mp.mtx.Unlock()