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core/state: revert pending storage updates if they revert to original #29661

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merged 1 commit into from
Apr 26, 2024
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core/state: revert pending storage updates if they revert to original #29661

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15 changes: 14 additions & 1 deletion core/state/state_object.go
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ import (
"github.com/ethereum/go-ethereum/core/tracing"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie/trienode"
"github.com/holiman/uint256"
Expand Down Expand Up @@ -255,9 +256,16 @@ func (s *stateObject) setState(key common.Hash, value *common.Hash) {
func (s *stateObject) finalise(prefetch bool) {
slotsToPrefetch := make([][]byte, 0, len(s.dirtyStorage))
for key, value := range s.dirtyStorage {
s.pendingStorage[key] = value
// If the slot is different from its original value, move it into the
// pending area to be committed at the end of the block (and prefetch
// the pathways).
if value != s.originStorage[key] {
s.pendingStorage[key] = value
slotsToPrefetch = append(slotsToPrefetch, common.CopyBytes(key[:])) // Copy needed for closure
} else {
// Otherwise, the slot was reverted to its original value, remove it
// from the pending area to avoid thrashing the data strutures.
delete(s.pendingStorage, key)
}
}
if s.db.prefetcher != nil && prefetch && len(slotsToPrefetch) > 0 && s.data.Root != types.EmptyRootHash {
Expand Down Expand Up @@ -371,6 +379,11 @@ func (s *stateObject) updateTrie() (Trie, error) {
}
s.db.StorageDeleted += 1
}
// If no slots were touched, issue a warning as we shouldn't have done all
// the above work in the first place
if len(usedStorage) == 0 {
log.Error("State object update was noop", "addr", s.address, "slots", len(s.pendingStorage))
}
if s.db.prefetcher != nil {
s.db.prefetcher.used(s.addrHash, s.data.Root, usedStorage)
}
Expand Down