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refactor: Add ChainstateManager::CurrentChainstate() method

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CurrentChainstate() is basically the same as ActiveChainstate() except it
requires cs_main to be locked when it is called, instead of locking cs_main
internally.

The name "current" should also be less confusing than "active" because multiple
chainstates can be active, and CurrentChainstate() returns the chainstate
targeting the current network tip, regardless of what chainstates are being
downloaded or how they are used.
This commit is contained in:
Ryan Ofsky
2024-05-30 12:03:47 -04:00
parent a9b7f5614c
commit a229cb9477
4 changed files with 20 additions and 18 deletions
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11
src/validation.cpp
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@@ -3841,7 +3841,7 @@ void ChainstateManager::ReceivedBlockTransactions(const CBlock& block, CBlockInd
// m_chain_tx_count value is not zero, assert that value is actually correct.
auto prev_tx_sum = [](CBlockIndex& block) { return block.nTx + (block.pprev ? block.pprev->m_chain_tx_count : 0); };
if (!Assume(pindexNew->m_chain_tx_count == 0 || pindexNew->m_chain_tx_count == prev_tx_sum(*pindexNew) ||
pindexNew == GetSnapshotBaseBlock())) {
pindexNew == CurrentChainstate().SnapshotBase())) {
LogWarning("Internal bug detected: block %d has unexpected m_chain_tx_count %i that should be %i (%s %s). Please report this issue here: %s\n",
pindexNew->nHeight, pindexNew->m_chain_tx_count, prev_tx_sum(*pindexNew), CLIENT_NAME, FormatFullVersion(), CLIENT_BUGREPORT);
pindexNew->m_chain_tx_count = 0;
@@ -4974,7 +4974,7 @@ bool ChainstateManager::LoadBlockIndex()
// VALID_TRANSACTIONS (eg if we haven't yet downloaded the block),
// so we special-case the snapshot block as a potential candidate
// here.
if (pindex == GetSnapshotBaseBlock() ||
if (pindex == CurrentChainstate().SnapshotBase() ||
(pindex->IsValid(BLOCK_VALID_TRANSACTIONS) &&
(pindex->HaveNumChainTxs() || pindex->pprev == nullptr))) {
@@ -5263,7 +5263,7 @@ void ChainstateManager::CheckBlockIndex() const
// to earlier blocks that have not been downloaded or validated yet, so
// checks for later blocks can assume the earlier blocks were validated and
// be stricter, testing for more requirements.
const CBlockIndex* snap_base{GetSnapshotBaseBlock()};
const CBlockIndex* snap_base{CurrentChainstate().SnapshotBase()};
const CBlockIndex *snap_first_missing{}, *snap_first_notx{}, *snap_first_notv{}, *snap_first_nocv{}, *snap_first_nosv{};
auto snap_update_firsts = [&] {
if (pindex == snap_base) {
@@ -6357,11 +6357,6 @@ ChainstateRole Chainstate::GetRole() const
return m_target_blockhash ? ChainstateRole::BACKGROUND : m_assumeutxo == Assumeutxo::UNVALIDATED ? ChainstateRole::ASSUMEDVALID : ChainstateRole::NORMAL;
}
const CBlockIndex* ChainstateManager::GetSnapshotBaseBlock() const
{
return m_active_chainstate ? m_active_chainstate->SnapshotBase() : nullptr;
}
void ChainstateManager::RecalculateBestHeader()
{
AssertLockHeld(cs_main);