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Make nWalletDBUpdated atomic to avoid a potential race.

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This commit is contained in:
Patrick Strateman 2016-11-26 19:32:30 -08:00
parent 76fec09d87
commit d63ff6265b
5 changed files with 43 additions and 33 deletions
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3
src/wallet/db.cpp
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@ -24,9 +24,6 @@
using namespace std;
unsigned int nWalletDBUpdated;
//
// CDB
//

2
src/wallet/db.h
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@ -23,8 +23,6 @@
static const unsigned int DEFAULT_WALLET_DBLOGSIZE = 100;
static const bool DEFAULT_WALLET_PRIVDB = true;
extern unsigned int nWalletDBUpdated;
class CDBEnv
{
private:

2
src/wallet/wallet.cpp
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@ -3508,7 +3508,7 @@ bool CWallet::InitLoadWallet()
walletInstance->ScanForWalletTransactions(pindexRescan, true);
LogPrintf(" rescan %15dms\n", GetTimeMillis() - nStart);
walletInstance->SetBestChain(chainActive.GetLocator());
nWalletDBUpdated++;
CWalletDB::IncrementUpdateCounter();
// Restore wallet transaction metadata after -zapwallettxes=1
if (GetBoolArg("-zapwallettxes", false) && GetArg("-zapwallettxes", "1") != "2")

66
src/wallet/walletdb.cpp
View File

@ -15,6 +15,8 @@
#include "utiltime.h"
#include "wallet/wallet.h"
#include <atomic>
#include <boost/version.hpp>
#include <boost/filesystem.hpp>
#include <boost/foreach.hpp>
@ -24,13 +26,15 @@ using namespace std;
static uint64_t nAccountingEntryNumber = 0;
static std::atomic<unsigned int> nWalletDBUpdateCounter;
//
// CWalletDB
//
bool CWalletDB::WriteName(const string& strAddress, const string& strName)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(make_pair(string("name"), strAddress), strName);
}
@ -38,37 +42,37 @@ bool CWalletDB::EraseName(const string& strAddress)
{
// This should only be used for sending addresses, never for receiving addresses,
// receiving addresses must always have an address book entry if they're not change return.
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(make_pair(string("name"), strAddress));
}
bool CWalletDB::WritePurpose(const string& strAddress, const string& strPurpose)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(make_pair(string("purpose"), strAddress), strPurpose);
}
bool CWalletDB::ErasePurpose(const string& strPurpose)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(make_pair(string("purpose"), strPurpose));
}
bool CWalletDB::WriteTx(const CWalletTx& wtx)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("tx"), wtx.GetHash()), wtx);
}
bool CWalletDB::EraseTx(uint256 hash)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("tx"), hash));
}
bool CWalletDB::WriteKey(const CPubKey& vchPubKey, const CPrivKey& vchPrivKey, const CKeyMetadata& keyMeta)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
if (!Write(std::make_pair(std::string("keymeta"), vchPubKey),
keyMeta, false))
@ -88,7 +92,7 @@ bool CWalletDB::WriteCryptedKey(const CPubKey& vchPubKey,
const CKeyMetadata &keyMeta)
{
const bool fEraseUnencryptedKey = true;
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
if (!Write(std::make_pair(std::string("keymeta"), vchPubKey),
keyMeta))
@ -106,31 +110,31 @@ bool CWalletDB::WriteCryptedKey(const CPubKey& vchPubKey,
bool CWalletDB::WriteMasterKey(unsigned int nID, const CMasterKey& kMasterKey)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("mkey"), nID), kMasterKey, true);
}
bool CWalletDB::WriteCScript(const uint160& hash, const CScript& redeemScript)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("cscript"), hash), *(const CScriptBase*)(&redeemScript), false);
}
bool CWalletDB::WriteWatchOnly(const CScript &dest)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)), '1');
}
bool CWalletDB::EraseWatchOnly(const CScript &dest)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("watchs"), *(const CScriptBase*)(&dest)));
}
bool CWalletDB::WriteBestBlock(const CBlockLocator& locator)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
Write(std::string("bestblock"), CBlockLocator()); // Write empty block locator so versions that require a merkle branch automatically rescan
return Write(std::string("bestblock_nomerkle"), locator);
}
@ -143,13 +147,13 @@ bool CWalletDB::ReadBestBlock(CBlockLocator& locator)
bool CWalletDB::WriteOrderPosNext(int64_t nOrderPosNext)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::string("orderposnext"), nOrderPosNext);
}
bool CWalletDB::WriteDefaultKey(const CPubKey& vchPubKey)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::string("defaultkey"), vchPubKey);
}
@ -160,13 +164,13 @@ bool CWalletDB::ReadPool(int64_t nPool, CKeyPool& keypool)
bool CWalletDB::WritePool(int64_t nPool, const CKeyPool& keypool)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("pool"), nPool), keypool);
}
bool CWalletDB::ErasePool(int64_t nPool)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("pool"), nPool));
}
@ -780,20 +784,20 @@ void ThreadFlushWalletDB(const string& strFile)
if (!GetBoolArg("-flushwallet", DEFAULT_FLUSHWALLET))
return;
unsigned int nLastSeen = nWalletDBUpdated;
unsigned int nLastFlushed = nWalletDBUpdated;
unsigned int nLastSeen = CWalletDB::GetUpdateCounter();
unsigned int nLastFlushed = CWalletDB::GetUpdateCounter();
int64_t nLastWalletUpdate = GetTime();
while (true)
{
MilliSleep(500);
if (nLastSeen != nWalletDBUpdated)
if (nLastSeen != CWalletDB::GetUpdateCounter())
{
nLastSeen = nWalletDBUpdated;
nLastSeen = CWalletDB::GetUpdateCounter();
nLastWalletUpdate = GetTime();
}
if (nLastFlushed != nWalletDBUpdated && GetTime() - nLastWalletUpdate >= 2)
if (nLastFlushed != CWalletDB::GetUpdateCounter() && GetTime() - nLastWalletUpdate >= 2)
{
TRY_LOCK(bitdb.cs_db,lockDb);
if (lockDb)
@ -814,7 +818,7 @@ void ThreadFlushWalletDB(const string& strFile)
if (_mi != bitdb.mapFileUseCount.end())
{
LogPrint("db", "Flushing %s\n", strFile);
nLastFlushed = nWalletDBUpdated;
nLastFlushed = CWalletDB::GetUpdateCounter();
int64_t nStart = GetTimeMillis();
// Flush wallet file so it's self contained
@ -921,19 +925,29 @@ bool CWalletDB::Recover(CDBEnv& dbenv, const std::string& filename)
bool CWalletDB::WriteDestData(const std::string &address, const std::string &key, const std::string &value)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::make_pair(std::string("destdata"), std::make_pair(address, key)), value);
}
bool CWalletDB::EraseDestData(const std::string &address, const std::string &key)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Erase(std::make_pair(std::string("destdata"), std::make_pair(address, key)));
}
bool CWalletDB::WriteHDChain(const CHDChain& chain)
{
nWalletDBUpdated++;
nWalletDBUpdateCounter++;
return Write(std::string("hdchain"), chain);
}
void CWalletDB::IncrementUpdateCounter()
{
nWalletDBUpdateCounter++;
}
unsigned int CWalletDB::GetUpdateCounter()
{
return nWalletDBUpdateCounter;
}

3
src/wallet/walletdb.h
View File

@ -176,10 +176,11 @@ public:
//! write the hdchain model (external chain child index counter)
bool WriteHDChain(const CHDChain& chain);
static void IncrementUpdateCounter();
static unsigned int GetUpdateCounter();
private:
CWalletDB(const CWalletDB&);
void operator=(const CWalletDB&);
};
void ThreadFlushWalletDB(const std::string& strFile);