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eth/downloader: fix race in downloadTesterPeer (#14942) 

* eth/downloader: fix race in downloadTesterPeer

Signed-off-by: Ivan Daniluk <ivan.daniluk@gmail.com>

* eth/downloader: minor datarace fix cleanup
This commit is contained in:
Ivan Daniluk 2017-08-08 20:10:09 +03:00 committed by Péter Szilágyi
parent 26b2d6e1aa
commit 17ce0a37de
1 changed files with 25 additions and 7 deletions
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32
eth/downloader/downloader_test.go
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@ -403,7 +403,7 @@ func (dl *downloadTester) newSlowPeer(id string, version int, hashes []common.Ha
dl.lock.Lock() dl.lock.Lock()
defer dl.lock.Unlock() defer dl.lock.Unlock()
var err = dl.downloader.RegisterPeer(id, version, &downloadTesterPeer{dl, id, delay}) var err = dl.downloader.RegisterPeer(id, version, &downloadTesterPeer{dl: dl, id: id, delay: delay})
if err == nil { if err == nil {
// Assign the owned hashes, headers and blocks to the peer (deep copy) // Assign the owned hashes, headers and blocks to the peer (deep copy)
dl.peerHashes[id] = make([]common.Hash, len(hashes)) dl.peerHashes[id] = make([]common.Hash, len(hashes))
@ -465,6 +465,24 @@ type downloadTesterPeer struct {
dl *downloadTester dl *downloadTester
id string id string
delay time.Duration delay time.Duration
lock sync.RWMutex
}
// setDelay is a thread safe setter for the network delay value.
func (dlp *downloadTesterPeer) setDelay(delay time.Duration) {
dlp.lock.Lock()
defer dlp.lock.Unlock()
dlp.delay = delay
}
// waitDelay is a thread safe way to sleep for the configured time.
func (dlp *downloadTesterPeer) waitDelay() {
dlp.lock.RLock()
delay := dlp.delay
dlp.lock.RUnlock()
time.Sleep(delay)
} }
// Head constructs a function to retrieve a peer's current head hash // Head constructs a function to retrieve a peer's current head hash
@ -499,7 +517,7 @@ func (dlp *downloadTesterPeer) RequestHeadersByHash(origin common.Hash, amount i
// origin; associated with a particular peer in the download tester. The returned // origin; associated with a particular peer in the download tester. The returned
// function can be used to retrieve batches of headers from the particular peer. // function can be used to retrieve batches of headers from the particular peer.
func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error { func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error {
time.Sleep(dlp.delay) dlp.waitDelay()
dlp.dl.lock.RLock() dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock() defer dlp.dl.lock.RUnlock()
@ -525,7 +543,7 @@ func (dlp *downloadTesterPeer) RequestHeadersByNumber(origin uint64, amount int,
// peer in the download tester. The returned function can be used to retrieve // peer in the download tester. The returned function can be used to retrieve
// batches of block bodies from the particularly requested peer. // batches of block bodies from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash) error { func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash) error {
time.Sleep(dlp.delay) dlp.waitDelay()
dlp.dl.lock.RLock() dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock() defer dlp.dl.lock.RUnlock()
@ -550,7 +568,7 @@ func (dlp *downloadTesterPeer) RequestBodies(hashes []common.Hash) error {
// peer in the download tester. The returned function can be used to retrieve // peer in the download tester. The returned function can be used to retrieve
// batches of block receipts from the particularly requested peer. // batches of block receipts from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash) error { func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash) error {
time.Sleep(dlp.delay) dlp.waitDelay()
dlp.dl.lock.RLock() dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock() defer dlp.dl.lock.RUnlock()
@ -572,7 +590,7 @@ func (dlp *downloadTesterPeer) RequestReceipts(hashes []common.Hash) error {
// peer in the download tester. The returned function can be used to retrieve // peer in the download tester. The returned function can be used to retrieve
// batches of node state data from the particularly requested peer. // batches of node state data from the particularly requested peer.
func (dlp *downloadTesterPeer) RequestNodeData(hashes []common.Hash) error { func (dlp *downloadTesterPeer) RequestNodeData(hashes []common.Hash) error {
time.Sleep(dlp.delay) dlp.waitDelay()
dlp.dl.lock.RLock() dlp.dl.lock.RLock()
defer dlp.dl.lock.RUnlock() defer dlp.dl.lock.RUnlock()
@ -1746,7 +1764,7 @@ func testFastCriticalRestarts(t *testing.T, protocol int, progress bool) {
for i := 0; i < fsPivotInterval; i++ { for i := 0; i < fsPivotInterval; i++ {
tester.peerMissingStates["peer"][headers[hashes[fsMinFullBlocks+i]].Root] = true tester.peerMissingStates["peer"][headers[hashes[fsMinFullBlocks+i]].Root] = true
} }
(tester.downloader.peers.peers["peer"].peer).(*downloadTesterPeer).delay = 500 * time.Millisecond // Enough to reach the critical section (tester.downloader.peers.peers["peer"].peer).(*downloadTesterPeer).setDelay(500 * time.Millisecond) // Enough to reach the critical section
// Synchronise with the peer a few times and make sure they fail until the retry limit // Synchronise with the peer a few times and make sure they fail until the retry limit
for i := 0; i < int(fsCriticalTrials)-1; i++ { for i := 0; i < int(fsCriticalTrials)-1; i++ {
@ -1765,7 +1783,7 @@ func testFastCriticalRestarts(t *testing.T, protocol int, progress bool) {
tester.lock.Lock() tester.lock.Lock()
tester.peerHeaders["peer"][hashes[fsMinFullBlocks-1]] = headers[hashes[fsMinFullBlocks-1]] tester.peerHeaders["peer"][hashes[fsMinFullBlocks-1]] = headers[hashes[fsMinFullBlocks-1]]
tester.peerMissingStates["peer"] = map[common.Hash]bool{tester.downloader.fsPivotLock.Root: true} tester.peerMissingStates["peer"] = map[common.Hash]bool{tester.downloader.fsPivotLock.Root: true}
(tester.downloader.peers.peers["peer"].peer).(*downloadTesterPeer).delay = 0 (tester.downloader.peers.peers["peer"].peer).(*downloadTesterPeer).setDelay(0)
tester.lock.Unlock() tester.lock.Unlock()
} }
} }