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Merge pull request #1780 from ethcore/trace-deadlock-fix

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Prevent deadlock on trace GC
This commit is contained in:
Robert Habermeier 2016-07-31 15:24:44 +02:00 committed by GitHub
commit 7c015f023f
1 changed files with 2 additions and 1 deletions
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ethcore/src/trace/db.rs
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@ -264,10 +264,11 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
// at first, let's insert new block traces
{
// note_used must be called before locking traces to avoid cache/traces deadlock on garbage collection
self.note_used(CacheID::Trace(request.block_hash.clone()));
let mut traces = self.traces.write();
// it's important to use overwrite here,
// cause this value might be queried by hash later
self.note_used(CacheID::Trace(request.block_hash.clone()));
batch.write_with_cache(DB_COL_TRACE, traces.deref_mut(), request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
}