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Fixed race condition in trace import (#2555)

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This commit is contained in:
Arkadiy Paronyan 2016-10-10 23:07:29 +02:00 committed by Gav Wood
parent 193cdb1326
commit 55dbd5bb1f
1 changed files with 15 additions and 12 deletions
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27
ethcore/src/trace/db.rs
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@ -256,16 +256,6 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
return;
}
// at first, let's insert new block traces
{
let mut traces = self.traces.write();
// it's important to use overwrite here,
// cause this value might be queried by hash later
batch.write_with_cache(db::COL_TRACE, &mut *traces, request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
// note_used must be called after locking traces to avoid cache/traces deadlock on garbage collection
self.note_used(CacheID::Trace(request.block_hash.clone()));
}
// now let's rebuild the blooms
if !request.enacted.is_empty() {
let range_start = request.block_number as Number + 1 - request.enacted.len();
@ -276,12 +266,25 @@ impl<T> TraceDatabase for TraceDB<T> where T: DatabaseExtras {
// all traces are expected to be found here. That's why `expect` has been used
// instead of `filter_map`. If some traces haven't been found, it meens that
// traces database is corrupted or incomplete.
.map(|block_hash| self.traces(block_hash).expect("Traces database is incomplete."))
.map(|block_traces| block_traces.bloom())
.map(|block_hash| if block_hash == &request.block_hash {
request.traces.bloom()
} else {
self.traces(block_hash).expect("Traces database is incomplete.").bloom()
})
.map(blooms::Bloom::from)
.map(Into::into)
.collect();
// insert new block traces into the cache and the database
{
let mut traces = self.traces.write();
// it's important to use overwrite here,
// cause this value might be queried by hash later
batch.write_with_cache(db::COL_TRACE, &mut *traces, request.block_hash, request.traces, CacheUpdatePolicy::Overwrite);
// note_used must be called after locking traces to avoid cache/traces deadlock on garbage collection
self.note_used(CacheID::Trace(request.block_hash.clone()));
}
let chain = BloomGroupChain::new(self.bloom_config, self);
let trace_blooms = chain.replace(&replaced_range, enacted_blooms);
let blooms_to_insert = trace_blooms.into_iter()