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Merge #11041: Add LookupBlockIndex

Browse Source 
92fabcd44 Add LookupBlockIndex function (João Barbosa)
43a32b739 Add missing cs_lock in CreateWalletFromFile (João Barbosa)
f814a3e8f Fix cs_main lock in LoadExternalBlockFile (João Barbosa)
c651df8b3 Lock cs_main while loading block index in AppInitMain (João Barbosa)
02de6a6bc Assert cs_main is held when accessing mapBlockIndex (João Barbosa)

Pull request description:

  Replace all `mapBlockIndex` lookups with the new `LookupBlockIndex()`. In some cases it avoids a second lookup.

Tree-SHA512: ca31118f028a19721f2191d86f2dd398144d04df345694575a64aeb293be2f85785201480c3c578a0ec99690516205708558c0fd4168b09313378fd4e60a8412
This commit is contained in:
Wladimir J. van der Laan
2018-03-13 19:04:28 +01:00
parent af88094e4f 92fabcd443
commit d42a4fe5aa
14 changed files with 169 additions and 152 deletions
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65
src/validation.cpp
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@ -260,12 +260,12 @@ namespace {
CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator)
{
AssertLockHeld(cs_main);
// Find the first block the caller has in the main chain
for (const uint256& hash : locator.vHave) {
BlockMap::iterator mi = mapBlockIndex.find(hash);
if (mi != mapBlockIndex.end())
{
CBlockIndex* pindex = (*mi).second;
CBlockIndex* pindex = LookupBlockIndex(hash);
if (pindex) {
if (chain.Contains(pindex))
return pindex;
if (pindex->GetAncestor(chain.Height()) == chain.Tip()) {
@ -1316,7 +1316,7 @@ bool CScriptCheck::operator()() {
int GetSpendHeight(const CCoinsViewCache& inputs)
{
LOCK(cs_main);
CBlockIndex* pindexPrev = mapBlockIndex.find(inputs.GetBestBlock())->second;
CBlockIndex* pindexPrev = LookupBlockIndex(inputs.GetBestBlock());
return pindexPrev->nHeight + 1;
}
@ -2826,6 +2826,8 @@ bool ResetBlockFailureFlags(CBlockIndex *pindex) {
CBlockIndex* CChainState::AddToBlockIndex(const CBlockHeader& block)
{
AssertLockHeld(cs_main);
// Check for duplicate
uint256 hash = block.GetHash();
BlockMap::iterator it = mapBlockIndex.find(hash);
@ -3272,7 +3274,6 @@ bool CChainState::AcceptBlockHeader(const CBlockHeader& block, CValidationState&
BlockMap::iterator miSelf = mapBlockIndex.find(hash);
CBlockIndex *pindex = nullptr;
if (hash != chainparams.GetConsensus().hashGenesisBlock) {
if (miSelf != mapBlockIndex.end()) {
// Block header is already known.
pindex = miSelf->second;
@ -3706,6 +3707,8 @@ fs::path GetBlockPosFilename(const CDiskBlockPos &pos, const char *prefix)
CBlockIndex * CChainState::InsertBlockIndex(const uint256& hash)
{
AssertLockHeld(cs_main);
if (hash.IsNull())
return nullptr;
@ -3833,6 +3836,8 @@ bool static LoadBlockIndexDB(const CChainParams& chainparams)
bool LoadChainTip(const CChainParams& chainparams)
{
AssertLockHeld(cs_main);
if (chainActive.Tip() && chainActive.Tip()->GetBlockHash() == pcoinsTip->GetBestBlock()) return true;
if (pcoinsTip->GetBestBlock().IsNull() && mapBlockIndex.size() == 1) {
@ -3846,10 +3851,11 @@ bool LoadChainTip(const CChainParams& chainparams)
}
// Load pointer to end of best chain
BlockMap::iterator it = mapBlockIndex.find(pcoinsTip->GetBestBlock());
if (it == mapBlockIndex.end())
CBlockIndex* pindex = LookupBlockIndex(pcoinsTip->GetBestBlock());
if (!pindex) {
return false;
chainActive.SetTip(it->second);
}
chainActive.SetTip(pindex);
g_chainstate.PruneBlockIndexCandidates();
@ -4296,26 +4302,31 @@ bool LoadExternalBlockFile(const CChainParams& chainparams, FILE* fileIn, CDiskB
blkdat >> block;
nRewind = blkdat.GetPos();
// detect out of order blocks, and store them for later
uint256 hash = block.GetHash();
if (hash != chainparams.GetConsensus().hashGenesisBlock && mapBlockIndex.find(block.hashPrevBlock) == mapBlockIndex.end()) {
LogPrint(BCLog::REINDEX, "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
block.hashPrevBlock.ToString());
if (dbp)
mapBlocksUnknownParent.insert(std::make_pair(block.hashPrevBlock, *dbp));
continue;
}
// process in case the block isn't known yet
if (mapBlockIndex.count(hash) == 0 || (mapBlockIndex[hash]->nStatus & BLOCK_HAVE_DATA) == 0) {
{
LOCK(cs_main);
CValidationState state;
if (g_chainstate.AcceptBlock(pblock, state, chainparams, nullptr, true, dbp, nullptr))
nLoaded++;
if (state.IsError())
break;
} else if (hash != chainparams.GetConsensus().hashGenesisBlock && mapBlockIndex[hash]->nHeight % 1000 == 0) {
LogPrint(BCLog::REINDEX, "Block Import: already had block %s at height %d\n", hash.ToString(), mapBlockIndex[hash]->nHeight);
// detect out of order blocks, and store them for later
if (hash != chainparams.GetConsensus().hashGenesisBlock && !LookupBlockIndex(block.hashPrevBlock)) {
LogPrint(BCLog::REINDEX, "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
block.hashPrevBlock.ToString());
if (dbp)
mapBlocksUnknownParent.insert(std::make_pair(block.hashPrevBlock, *dbp));
continue;
}
// process in case the block isn't known yet
CBlockIndex* pindex = LookupBlockIndex(hash);
if (!pindex || (pindex->nStatus & BLOCK_HAVE_DATA) == 0) {
CValidationState state;
if (g_chainstate.AcceptBlock(pblock, state, chainparams, nullptr, true, dbp, nullptr)) {
nLoaded++;
}
if (state.IsError()) {
break;
}
} else if (hash != chainparams.GetConsensus().hashGenesisBlock && pindex->nHeight % 1000 == 0) {
LogPrint(BCLog::REINDEX, "Block Import: already had block %s at height %d\n", hash.ToString(), pindex->nHeight);
}
}
// Activate the genesis block so normal node progress can continue