tornadocontrib/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

miner, test: fix potential goroutine leak (#21989)

Browse Source 
In miner/worker.go, there are two goroutine using channel w.newWorkCh: newWorkerLoop() sends to this channel, and mainLoop() receives from this channel. Only the receive operation is in a select.

However, w.exitCh may be closed by another goroutine. This is fine for the receive since receive is in select, but if the send operation is blocking, then it will block forever. This commit puts the send in a select, so it won't block even if w.exitCh is closed.

Similarly, there are two goroutines using channel errc: the parent that runs the test receives from it, and the child created at line 573 sends to it. If the parent goroutine exits too early by calling t.Fatalf() at line 614, then the child goroutine will be blocked at line 574 forever. This commit adds 1 buffer to errc. Now send will not block, and receive is not influenced because receive still needs to wait for the send.
This commit is contained in:
lzhfromustc 2020-12-11 04:29:42 -05:00 committed by GitHub
parent 1a715d7db5
commit 62dc59c2bd
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
eth/downloader/downloader_test.go
View File

@ -569,7 +569,7 @@ func testThrottling(t *testing.T, protocol int, mode SyncMode) {
<-proceed
}
// Start a synchronisation concurrently
errc := make(chan error)
errc := make(chan error, 1)
go func() {
errc <- tester.sync("peer", nil, mode)
}()

6
miner/worker.go
View File

@ -347,7 +347,11 @@ func (w *worker) newWorkLoop(recommit time.Duration) {
atomic.StoreInt32(interrupt, s)
}
interrupt = new(int32)
w.newWorkCh <- &newWorkReq{interrupt: interrupt, noempty: noempty, timestamp: timestamp}
select {
case w.newWorkCh <- &newWorkReq{interrupt: interrupt, noempty: noempty, timestamp: timestamp}:
case <-w.exitCh:
return
}
timer.Reset(recommit)
atomic.StoreInt32(&w.newTxs, 0)
}