TraceDB: Snapshot-backed state for the trace baker#3360
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TraceDB: Snapshot-backed state for the trace baker#3360Kbhat1 wants to merge 5 commits intopr/trace-baker-mainfrom
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Stacks on the trace baker PR. Captures an O(1) memiavl snapshot of the SC tree at EndBlock and serves trace re-execution from in-RAM state instead of SS-pebble. memiavl: refcount *Snapshot. Tree.Copy() Acquires; Snapshot.Close unmaps only on the final release. Without this a held copy was a use-after-munmap waiting to happen — the background snapshot rewrite calls Tree.ReplaceWith → snapshot.Close mid-flight, segfaulting any held copy. The internal rewrite goroutine also drops its clone's ref so the refcount can reach zero. Committer interface gains Copy(). memiavl delegates to *DB.Copy. composite returns nil when flatkv is engaged so the snapshot path silently falls back. storev2 rootmulti adds SnapshotSCStore + CacheMultiStoreFromCommitter. EVM keeper: TraceSnapshotStore (bounded by-height map) and EndBlock capture keyed by snapshot.Version() (= H-1 at EndBlock(H)). App: SnapshotAwareRPCContextProvider builds the sdk.Context directly from the snapshot CMS to skip the throwaway CacheMultiStoreWithVersion that CreateQueryContext would otherwise make. Configurable via [evm]: trace_bake_use_snapshot (default false) trace_bake_snapshot_window (default 64) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## pr/trace-baker-main #3360 +/- ##
=======================================================
- Coverage 59.31% 59.28% -0.03%
=======================================================
Files 2099 2100 +1
Lines 173370 173676 +306
=======================================================
+ Hits 102826 102970 +144
- Misses 61652 61789 +137
- Partials 8892 8917 +25
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Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Describe your changes and provide context
StateReleaseFunc, avoiding GC finalizers.trace_bake_use_snapshot; falls back when the backend cannot provide a snapshot.Testing performed to validate your change
go test ./sei-db/state_db/sc/memiavl -run 'TreeCopy|Snapshot' -count=1