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-rw-r--r--src/rpc/mining.cpp2
-rw-r--r--src/txmempool.cpp14
-rw-r--r--src/txmempool.h27
-rw-r--r--src/validation.cpp10
-rw-r--r--src/validation.h7
5 files changed, 26 insertions, 34 deletions
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index ba5e0cdf64..86b0845738 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -469,7 +469,7 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
nTransactionsUpdatedLastLP = nTransactionsUpdatedLast;
}
- // Release the wallet and main lock while waiting
+ // Release lock while waiting
LEAVE_CRITICAL_SECTION(cs_main);
{
checktxtime = std::chrono::steady_clock::now() + std::chrono::minutes(1);
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 2f4e5fee4b..9257cff718 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -104,7 +104,7 @@ void CTxMemPool::UpdateForDescendants(txiter updateIt, cacheMap &cachedDescendan
// for each such descendant, also update the ancestor state to include the parent.
void CTxMemPool::UpdateTransactionsFromBlock(const std::vector<uint256> &vHashesToUpdate)
{
- LOCK(cs);
+ AssertLockHeld(cs);
// For each entry in vHashesToUpdate, store the set of in-mempool, but not
// in-vHashesToUpdate transactions, so that we don't have to recalculate
// descendants when we come across a previously seen entry.
@@ -457,8 +457,7 @@ void CTxMemPool::CalculateDescendants(txiter entryit, setEntries& setDescendants
void CTxMemPool::removeRecursive(const CTransaction &origTx, MemPoolRemovalReason reason)
{
// Remove transaction from memory pool
- {
- LOCK(cs);
+ AssertLockHeld(cs);
setEntries txToRemove;
txiter origit = mapTx.find(origTx.GetHash());
if (origit != mapTx.end()) {
@@ -483,13 +482,12 @@ void CTxMemPool::removeRecursive(const CTransaction &origTx, MemPoolRemovalReaso
}
RemoveStaged(setAllRemoves, false, reason);
- }
}
void CTxMemPool::removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight, int flags)
{
// Remove transactions spending a coinbase which are now immature and no-longer-final transactions
- LOCK(cs);
+ AssertLockHeld(cs);
setEntries txToRemove;
for (indexed_transaction_set::const_iterator it = mapTx.begin(); it != mapTx.end(); it++) {
const CTransaction& tx = it->GetTx();
@@ -545,7 +543,7 @@ void CTxMemPool::removeConflicts(const CTransaction &tx)
*/
void CTxMemPool::removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight)
{
- LOCK(cs);
+ AssertLockHeld(cs);
std::vector<const CTxMemPoolEntry*> entries;
for (const auto& tx : vtx)
{
@@ -920,7 +918,7 @@ void CTxMemPool::RemoveStaged(setEntries &stage, bool updateDescendants, MemPool
}
int CTxMemPool::Expire(int64_t time) {
- LOCK(cs);
+ AssertLockHeld(cs);
indexed_transaction_set::index<entry_time>::type::iterator it = mapTx.get<entry_time>().begin();
setEntries toremove;
while (it != mapTx.get<entry_time>().end() && it->GetTime() < time) {
@@ -1013,7 +1011,7 @@ void CTxMemPool::trackPackageRemoved(const CFeeRate& rate) {
}
void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpendsRemaining) {
- LOCK(cs);
+ AssertLockHeld(cs);
unsigned nTxnRemoved = 0;
CFeeRate maxFeeRateRemoved(0);
diff --git a/src/txmempool.h b/src/txmempool.h
index 59514a945b..565dd61f0f 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -514,21 +514,12 @@ public:
* `mempool.cs` whenever adding transactions to the mempool and whenever
* changing the chain tip. It's necessary to keep both mutexes locked until
* the mempool is consistent with the new chain tip and fully populated.
- *
- * @par Consistency bug
- *
- * The second guarantee above is not currently enforced, but
- * https://github.com/bitcoin/bitcoin/pull/14193 will fix it. No known code
- * in bitcoin currently depends on second guarantee, but it is important to
- * fix for third party code that needs be able to frequently poll the
- * mempool without locking `cs_main` and without encountering missing
- * transactions during reorgs.
*/
mutable RecursiveMutex cs;
indexed_transaction_set mapTx GUARDED_BY(cs);
using txiter = indexed_transaction_set::nth_index<0>::type::const_iterator;
- std::vector<std::pair<uint256, txiter> > vTxHashes; //!< All tx witness hashes/entries in mapTx, in random order
+ std::vector<std::pair<uint256, txiter>> vTxHashes GUARDED_BY(cs); //!< All tx witness hashes/entries in mapTx, in random order
struct CompareIteratorByHash {
bool operator()(const txiter &a, const txiter &b) const {
@@ -583,10 +574,10 @@ public:
void addUnchecked(const CTxMemPoolEntry& entry, bool validFeeEstimate = true) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
void addUnchecked(const CTxMemPoolEntry& entry, setEntries& setAncestors, bool validFeeEstimate = true) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
- void removeRecursive(const CTransaction &tx, MemPoolRemovalReason reason = MemPoolRemovalReason::UNKNOWN);
- void removeForReorg(const CCoinsViewCache *pcoins, unsigned int nMemPoolHeight, int flags) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
- void removeConflicts(const CTransaction &tx) EXCLUSIVE_LOCKS_REQUIRED(cs);
- void removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight);
+ void removeRecursive(const CTransaction& tx, MemPoolRemovalReason reason = MemPoolRemovalReason::UNKNOWN) EXCLUSIVE_LOCKS_REQUIRED(cs);
+ void removeForReorg(const CCoinsViewCache* pcoins, unsigned int nMemPoolHeight, int flags) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
+ void removeConflicts(const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(cs);
+ void removeForBlock(const std::vector<CTransactionRef>& vtx, unsigned int nBlockHeight) EXCLUSIVE_LOCKS_REQUIRED(cs);
void clear();
void _clear() EXCLUSIVE_LOCKS_REQUIRED(cs); //lock free
@@ -599,7 +590,7 @@ public:
* Check that none of this transactions inputs are in the mempool, and thus
* the tx is not dependent on other mempool transactions to be included in a block.
*/
- bool HasNoInputsOf(const CTransaction& tx) const;
+ bool HasNoInputsOf(const CTransaction& tx) const EXCLUSIVE_LOCKS_REQUIRED(cs);
/** Affect CreateNewBlock prioritisation of transactions */
void PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta);
@@ -633,7 +624,7 @@ public:
* for). Note: vHashesToUpdate should be the set of transactions from the
* disconnected block that have been accepted back into the mempool.
*/
- void UpdateTransactionsFromBlock(const std::vector<uint256>& vHashesToUpdate) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+ void UpdateTransactionsFromBlock(const std::vector<uint256>& vHashesToUpdate) EXCLUSIVE_LOCKS_REQUIRED(cs, cs_main);
/** Try to calculate all in-mempool ancestors of entry.
* (these are all calculated including the tx itself)
@@ -664,10 +655,10 @@ public:
* pvNoSpendsRemaining, if set, will be populated with the list of outpoints
* which are not in mempool which no longer have any spends in this mempool.
*/
- void TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpendsRemaining=nullptr);
+ void TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpendsRemaining = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs);
/** Expire all transaction (and their dependencies) in the mempool older than time. Return the number of removed transactions. */
- int Expire(int64_t time);
+ int Expire(int64_t time) EXCLUSIVE_LOCKS_REQUIRED(cs);
/**
* Calculate the ancestor and descendant count for the given transaction.
diff --git a/src/validation.cpp b/src/validation.cpp
index b2925efe32..85bb2103f5 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -305,7 +305,8 @@ bool CheckSequenceLocks(const CTxMemPool& pool, const CTransaction& tx, int flag
// Returns the script flags which should be checked for a given block
static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consensus::Params& chainparams);
-static void LimitMempoolSize(CTxMemPool& pool, size_t limit, unsigned long age) {
+static void LimitMempoolSize(CTxMemPool& pool, size_t limit, unsigned long age) EXCLUSIVE_LOCKS_REQUIRED(pool.cs)
+{
int expired = pool.Expire(GetTime() - age);
if (expired != 0) {
LogPrint(BCLog::MEMPOOL, "Expired %i transactions from the memory pool\n", expired);
@@ -342,7 +343,7 @@ static bool IsCurrentForFeeEstimation() EXCLUSIVE_LOCKS_REQUIRED(cs_main)
* and instead just erase from the mempool as needed.
*/
-static void UpdateMempoolForReorg(DisconnectedBlockTransactions &disconnectpool, bool fAddToMempool) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
+static void UpdateMempoolForReorg(DisconnectedBlockTransactions& disconnectpool, bool fAddToMempool) EXCLUSIVE_LOCKS_REQUIRED(cs_main, ::mempool.cs)
{
AssertLockHeld(cs_main);
std::vector<uint256> vHashUpdate;
@@ -2549,7 +2550,7 @@ bool CChainState::ActivateBestChain(CValidationState &state, const CChainParams&
LimitValidationInterfaceQueue();
{
- LOCK(cs_main);
+ LOCK2(cs_main, ::mempool.cs); // Lock transaction pool for at least as long as it takes for connectTrace to be consumed
CBlockIndex* starting_tip = m_chain.Tip();
bool blocks_connected = false;
do {
@@ -2669,6 +2670,7 @@ bool CChainState::InvalidateBlock(CValidationState& state, const CChainParams& c
LimitValidationInterfaceQueue();
LOCK(cs_main);
+ LOCK(::mempool.cs); // Lock for as long as disconnectpool is in scope to make sure UpdateMempoolForReorg is called after DisconnectTip without unlocking in between
if (!m_chain.Contains(pindex)) break;
pindex_was_in_chain = true;
CBlockIndex *invalid_walk_tip = m_chain.Tip();
@@ -4102,7 +4104,7 @@ bool CChainState::RewindBlockIndex(const CChainParams& params)
// Loop until the tip is below nHeight, or we reach a pruned block.
while (!ShutdownRequested()) {
{
- LOCK(cs_main);
+ LOCK2(cs_main, ::mempool.cs);
// Make sure nothing changed from under us (this won't happen because RewindBlockIndex runs before importing/network are active)
assert(tip == m_chain.Tip());
if (tip == nullptr || tip->nHeight < nHeight) break;
diff --git a/src/validation.h b/src/validation.h
index 963439d35b..9b301a4bcc 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -18,6 +18,7 @@
#include <protocol.h> // For CMessageHeader::MessageStartChars
#include <script/script_error.h>
#include <sync.h>
+#include <txmempool.h> // For CTxMemPool::cs
#include <versionbits.h>
#include <algorithm>
@@ -556,7 +557,7 @@ public:
CCoinsViewCache& view, const CChainParams& chainparams, bool fJustCheck = false) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
// Block disconnection on our pcoinsTip:
- bool DisconnectTip(CValidationState& state, const CChainParams& chainparams, DisconnectedBlockTransactions* disconnectpool) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+ bool DisconnectTip(CValidationState& state, const CChainParams& chainparams, DisconnectedBlockTransactions* disconnectpool) EXCLUSIVE_LOCKS_REQUIRED(cs_main, ::mempool.cs);
// Manual block validity manipulation:
bool PreciousBlock(CValidationState& state, const CChainParams& params, CBlockIndex* pindex) LOCKS_EXCLUDED(cs_main);
@@ -575,8 +576,8 @@ public:
bool IsInitialBlockDownload() const;
private:
- bool ActivateBestChainStep(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const std::shared_ptr<const CBlock>& pblock, bool& fInvalidFound, ConnectTrace& connectTrace) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
- bool ConnectTip(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexNew, const std::shared_ptr<const CBlock>& pblock, ConnectTrace& connectTrace, DisconnectedBlockTransactions &disconnectpool) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+ bool ActivateBestChainStep(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexMostWork, const std::shared_ptr<const CBlock>& pblock, bool& fInvalidFound, ConnectTrace& connectTrace) EXCLUSIVE_LOCKS_REQUIRED(cs_main, ::mempool.cs);
+ bool ConnectTip(CValidationState& state, const CChainParams& chainparams, CBlockIndex* pindexNew, const std::shared_ptr<const CBlock>& pblock, ConnectTrace& connectTrace, DisconnectedBlockTransactions& disconnectpool) EXCLUSIVE_LOCKS_REQUIRED(cs_main, ::mempool.cs);
CBlockIndex* AddToBlockIndex(const CBlockHeader& block) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
/** Create a new block index entry for a given block hash */