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eth, les: rework chain tracer (#25143)

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This PR simplifies the logic of chain tracer and also adds the unit tests.

The most important change has been made in this PR is the state management. Whenever a tracing state is acquired there is a corresponding release function be returned as well. It must be called once the state is used up, otherwise resource leaking can happen.

And also the logic of state management has been simplified a lot. Specifically, the state provider(eth backend, les backend) should ensure the state is available and referenced. State customers can use the state according to their own needs, or build other states based on the given state. But once the release function is called, there is no guarantee of the availability of the state.


Co-authored-by: Sina Mahmoodi <1591639+s1na@users.noreply.github.com>
Co-authored-by: Péter Szilágyi <peterke@gmail.com>
This commit is contained in:
rjl493456442
2022-09-07 20:25:58 +02:00
committed by GitHub
co-authored by Sina Mahmoodi Péter Szilágyi
parent dea1fb3cfc
commit b1f6dccfba
7 changed files with 311 additions and 158 deletions
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eth/api.go
+3 -1
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@@ -411,10 +411,12 @@ func (api *DebugAPI) StorageRangeAt(blockHash common.Hash, txIndex int, contract
if block == nil {
return StorageRangeResult{}, fmt.Errorf("block %#x not found", blockHash)
}
_, _, statedb, err := api.eth.stateAtTransaction(block, txIndex, 0)
_, _, statedb, release, err := api.eth.stateAtTransaction(block, txIndex, 0)
if err != nil {
return StorageRangeResult{}, err
}
defer release()
st := statedb.StorageTrie(contractAddress)
if st == nil {
return StorageRangeResult{}, fmt.Errorf("account %x doesn't exist", contractAddress)