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Move orphan processing to ActivateBestChain

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This further decouples "main" and "net" processing logic by moving
orphan processing out of the chain-connecting cs_main lock and
into its own cs_main lock, beside all of the other chain callbacks.

Once further decoupling of net and main processing logic occurs,
orphan handing should move to its own lock, out of cs_main.

Note that this will introduce a race if there are any cases where
we assume the orphan map to be consistent with the current chain
tip, however I am confident there is no such case (ATMP will fail
without DoS score in all such cases).
This commit is contained in:
Matt Corallo 2016-10-15 17:34:02 -04:00
parent 9346f84299
commit ec4525ccc1
1 changed files with 27 additions and 20 deletions
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47
src/main.cpp
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@ -2461,7 +2461,6 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
std::vector<uint256> vOrphanErase;
std::vector<int> prevheights;
CAmount nFees = 0;
int nInputs = 0;
@ -2492,17 +2491,6 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
prevheights[j] = view.AccessCoins(tx.vin[j].prevout.hash)->nHeight;
}
// Which orphan pool entries must we evict?
for (size_t j = 0; j < tx.vin.size(); j++) {
auto itByPrev = mapOrphanTransactionsByPrev.find(tx.vin[j].prevout);
if (itByPrev == mapOrphanTransactionsByPrev.end()) continue;
for (auto mi = itByPrev->second.begin(); mi != itByPrev->second.end(); ++mi) {
const CTransaction& orphanTx = (*mi)->second.tx;
const uint256& orphanHash = orphanTx.GetHash();
vOrphanErase.push_back(orphanHash);
}
}
if (!SequenceLocks(tx, nLockTimeFlags, &prevheights, *pindex)) {
return state.DoS(100, error("%s: contains a non-BIP68-final transaction", __func__),
REJECT_INVALID, "bad-txns-nonfinal");
@ -2592,14 +2580,6 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
GetMainSignals().UpdatedTransaction(hashPrevBestCoinBase);
hashPrevBestCoinBase = block.vtx[0].GetHash();
// Erase orphan transactions include or precluded by this block
if (vOrphanErase.size()) {
int nErased = 0;
BOOST_FOREACH(uint256 &orphanHash, vOrphanErase) {
nErased += EraseOrphanTx(orphanHash);
}
LogPrint("mempool", "Erased %d orphan tx included or conflicted by block\n", nErased);
}
int64_t nTime6 = GetTimeMicros(); nTimeCallbacks += nTime6 - nTime5;
LogPrint("bench", " - Callbacks: %.2fms [%.2fs]\n", 0.001 * (nTime6 - nTime5), nTimeCallbacks * 0.000001);
@ -3105,6 +3085,33 @@ bool ActivateBestChain(CValidationState &state, const CChainParams& chainparams,
}
// When we reach this point, we switched to a new tip (stored in pindexNewTip).
// Remove orphan transactions with cs_main
{
LOCK(cs_main);
std::vector<uint256> vOrphanErase;
for(unsigned int i = 0; i < txChanged.size(); i++) {
const CTransaction& tx = std::get<0>(txChanged[i]);
// Which orphan pool entries must we evict?
for (size_t j = 0; j < tx.vin.size(); j++) {
auto itByPrev = mapOrphanTransactionsByPrev.find(tx.vin[j].prevout);
if (itByPrev == mapOrphanTransactionsByPrev.end()) continue;
for (auto mi = itByPrev->second.begin(); mi != itByPrev->second.end(); ++mi) {
const CTransaction& orphanTx = (*mi)->second.tx;
const uint256& orphanHash = orphanTx.GetHash();
vOrphanErase.push_back(orphanHash);
}
}
}
// Erase orphan transactions include or precluded by this block
if (vOrphanErase.size()) {
int nErased = 0;
BOOST_FOREACH(uint256 &orphanHash, vOrphanErase) {
nErased += EraseOrphanTx(orphanHash);
}
LogPrint("mempool", "Erased %d orphan tx included or conflicted by block\n", nErased);
}
}
// Notifications/callbacks that can run without cs_main
// throw all transactions though the signal-interface