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core/state: copy the snap when copying the state (#22340)

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* core/state: copy the snap when copying the state

* core/state: deep-copy snap stuff during state Copy
This commit is contained in:
Martin Holst Swende 2021-02-18 09:05:47 +01:00 committed by GitHub
parent e01096f531
commit 52e5c38aa5
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1 changed files with 25 additions and 0 deletions
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25
core/state/statedb.go
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@ -728,6 +728,31 @@ func (s *StateDB) Copy() *StateDB {
if s.prefetcher != nil { if s.prefetcher != nil {
state.prefetcher = s.prefetcher.copy() state.prefetcher = s.prefetcher.copy()
} }
if s.snaps != nil {
// In order for the miner to be able to use and make additions
// to the snapshot tree, we need to copy that aswell.
// Otherwise, any block mined by ourselves will cause gaps in the tree,
// and force the miner to operate trie-backed only
state.snaps = s.snaps
state.snap = s.snap
// deep copy needed
state.snapDestructs = make(map[common.Hash]struct{})
for k, v := range s.snapDestructs {
state.snapDestructs[k] = v
}
state.snapAccounts = make(map[common.Hash][]byte)
for k, v := range s.snapAccounts {
state.snapAccounts[k] = v
}
state.snapStorage = make(map[common.Hash]map[common.Hash][]byte)
for k, v := range s.snapStorage {
temp := make(map[common.Hash][]byte)
for kk, vv := range v {
temp[kk] = vv
}
state.snapStorage[k] = temp
}
}
return state return state
} }