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eth/downloader: ensure cancel channel is closed post sync

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This commit is contained in:
Péter Szilágyi 2016-05-30 12:01:50 +03:00
parent ab664c7e17
commit 4496a44f68
2 changed files with 13 additions and 1 deletions
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2
eth/downloader/downloader.go
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@ -332,6 +332,8 @@ func (d *Downloader) synchronise(id string, hash common.Hash, td *big.Int, mode
d.cancelCh = make(chan struct{}) d.cancelCh = make(chan struct{})
d.cancelLock.Unlock() d.cancelLock.Unlock()
defer d.cancel() // No matter what, we can't leave the cancel channel open
// Set the requested sync mode, unless it's forbidden // Set the requested sync mode, unless it's forbidden
d.mode = mode d.mode = mode
if d.mode == FastSync && d.noFast { if d.mode == FastSync && d.noFast {

12
eth/downloader/downloader_test.go
View File

@ -188,7 +188,17 @@ func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
} }
} }
dl.lock.RUnlock() dl.lock.RUnlock()
return dl.downloader.synchronise(id, hash, td, mode)
// Synchronise with the chosen peer and ensure proper cleanup afterwards
err := dl.downloader.synchronise(id, hash, td, mode)
select {
case <-dl.downloader.cancelCh:
// Ok, downloader fully cancelled after sync cycle
default:
// Downloader is still accepting packets, can block a peer up
panic("downloader active post sync cycle") // panic will be caught by tester
}
return err
} }
// hasHeader checks if a header is present in the testers canonical chain. // hasHeader checks if a header is present in the testers canonical chain.