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core: fix potential data race in logging code

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Spotted in CircleCI build with Go 1.12:

WARNING: DATA RACE
Write at 0x00c00011095c by goroutine 88:
  sync/atomic.SwapInt32()
      /usr/local/go/src/runtime/race_amd64.s:249 +0xb
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).persist()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:483 +0x172
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).Run.func2()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:191 +0x50

Previous read at 0x00c00011095c by goroutine 64:
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).persist()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:492 +0x4be
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).Run.func2()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:191 +0x50

Goroutine 88 (running) created at:
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).Run()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:190 +0x264

Goroutine 64 (finished) created at:
  github.com/CityOfZion/neo-go/pkg/core.(*Blockchain).Run()
      /go/src/github.com/CityOfZion/neo-go/pkg/core/blockchain.go:190 +0x264
This commit is contained in:
Roman Khimov 2019-10-15 18:55:32 +03:00
parent a6610ba082
commit 8926cbe368
1 changed files with 1 additions and 1 deletions
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2
pkg/core/blockchain.go
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@ -489,7 +489,7 @@ func (bc *Blockchain) persist(ctx context.Context) error {
"persistedKeys": persisted, "persistedKeys": persisted,
"headerHeight": bc.HeaderHeight(), "headerHeight": bc.HeaderHeight(),
"blockHeight": bc.BlockHeight(), "blockHeight": bc.BlockHeight(),
"persistedHeight": bc.persistedHeight, "persistedHeight": atomic.LoadUint32(&bc.persistedHeight),
"took": time.Since(start), "took": time.Since(start),
}).Info("blockchain persist completed") }).Info("blockchain persist completed")
} }