sikkienl/dash
1
0
Fork 0
mirror of https://github.com/dashpay/dash.git synced 2024-12-25 20:12:57 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fixed potential deadlocks in GUI code.

Browse Source 
Also changed semantics of CWalletTx::GetTxTime(); now always returns the time the transaction was received by this node, not the average block time.
And added information about -DDEBUG_LOCKORDER to coding.txt.
This commit is contained in:
Gavin Andresen 2011-08-31 12:27:19 -04:00
parent 6cc4a62c0e
commit 471426fb3b
3 changed files with 227 additions and 199 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
doc/coding.txt
View File

@ -39,3 +39,47 @@ v vector or similar list objects
map map or multimap
set set or multiset
bn CBigNum
-------------------------
Locking/mutex usage notes
The code is multi-threaded, and uses mutexes and the CRITICAL_BLOCK/TRY_CRITICAL_BLOCK macros to protect data structures.
Deadlocks due to inconsistent lock ordering (thread 1 locks cs_main and then cs_wallet, while thread 2 locks them in the opposite order: result, deadlock as each waits for the other to release its lock) are a problem. Compile with -DDEBUG_LOCKORDER to get lock order inconsistencies reported in the debug.log file.
Re-architecting the core code so there are better-defined interfaces between the various components is a goal, with any necessary locking done by the components (e.g. see the self-contained CKeyStore class and its cs_KeyStore lock for example).
-------
Threads
StartNode : Starts other threads.
ThreadGetMyExternalIP : Determines outside-the-firewall IP address, sends addr message to connected peers when it determines it.
ThreadIRCSeed : Joins IRC bootstrapping channel, watching for new peers and advertising this node's IP address.
ThreadSocketHandler : Sends/Receives data from peers on port 8333.
ThreadMessageHandler : Higher-level message handling (sending and receiving).
ThreadOpenConnections : Initiates new connections to peers.
ThreadTopUpKeyPool : replenishes the keystore's keypool.
ThreadCleanWalletPassphrase : re-locks an encrypted wallet after user has unlocked it for a period of time.
SendingDialogStartTransfer : used by pay-via-ip-address code (obsolete)
ThreadDelayedRepaint : repaint the gui
ThreadFlushWalletDB : Close the wallet.dat file if it hasn't been used in 500ms.
ThreadRPCServer : Remote procedure call handler, listens on port 8332 for connections and services them.
ThreadBitcoinMiner : Generates bitcoins
ThreadMapPort : Universal plug-and-play startup/shutdown
Shutdown : Does an orderly shutdown of everything
ExitTimeout : Windows-only, sleeps 5 seconds then exits application

64
src/ui.cpp
View File

@ -708,7 +708,7 @@ bool CMainFrame::InsertTransaction(const CWalletTx& wtx, bool fNew, int nIndex)
CBitcoinAddress address;
if (ExtractAddress(txout.scriptPubKey, pwalletMain, address))
{
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
//strDescription += _("Received payment to ");
//strDescription += _("Received with address ");
@ -792,7 +792,7 @@ bool CMainFrame::InsertTransaction(const CWalletTx& wtx, bool fNew, int nIndex)
}
string strDescription = _("To: ");
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
if (pwalletMain->mapAddressBook.count(address) && !pwalletMain->mapAddressBook[address].empty())
strDescription += pwalletMain->mapAddressBook[address] + " ";
strDescription += strAddress;
@ -1032,6 +1032,7 @@ void MainFrameRepaint()
printf("MainFrameRepaint\n");
wxPaintEvent event;
pframeMain->fRefresh = true;
pframeMain->fRefreshListCtrl = true;
pframeMain->GetEventHandler()->AddPendingEvent(event);
}
}
@ -1247,8 +1248,6 @@ void CMainFrame::OnMenuOptionsChangeWalletPassphrase(wxCommandEvent& event)
strOldWalletPass = wxGetPasswordFromUser(_("Enter the current passphrase to the wallet."),
_("Passphrase")).ToStdString();
CRITICAL_BLOCK(pwalletMain->cs_vMasterKey)
{
bool fWasLocked = pwalletMain->IsLocked();
pwalletMain->Lock();
@ -1323,7 +1322,6 @@ void CMainFrame::OnMenuOptionsChangeWalletPassphrase(wxCommandEvent& event)
munlock(&strNewWalletPass[0], strNewWalletPass.capacity());
munlock(&strNewWalletPassTest[0], strNewWalletPassTest.capacity());
wxMessageBox(_("Wallet Passphrase Changed."), "Bitcoin");
}
}
void CMainFrame::OnMenuOptionsOptions(wxCommandEvent& event)
@ -1387,8 +1385,7 @@ void CMainFrame::OnButtonNew(wxCommandEvent& event)
string strName = dialog.GetValue();
string strAddress;
CRITICAL_BLOCK(pwalletMain->cs_vMasterKey)
{
bool fWasLocked = pwalletMain->IsLocked();
if (!GetWalletPassphrase())
return;
@ -1398,10 +1395,9 @@ void CMainFrame::OnButtonNew(wxCommandEvent& event)
if (fWasLocked)
pwalletMain->Lock();
}
// Save
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
pwalletMain->SetAddressBookName(strAddress, strName);
SetDefaultReceivingAddress(strAddress);
}
@ -1451,7 +1447,7 @@ CTxDetailsDialog::CTxDetailsDialog(wxWindow* parent, CWalletTx wtx) : CTxDetails
#ifdef __WXMSW__
SetSize(nScaleX * GetSize().GetWidth(), nScaleY * GetSize().GetHeight());
#endif
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
string strHTML;
strHTML.reserve(4000);
@ -2159,19 +2155,21 @@ void CSendDialog::OnButtonSend(wxCommandEvent& event)
bool fBitcoinAddress = address.IsValid();
if (fBitcoinAddress)
{
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(pwalletMain->cs_vMasterKey)
{
bool fWasLocked = pwalletMain->IsLocked();
if (!GetWalletPassphrase())
return;
string strError;
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
// Send to bitcoin address
CScript scriptPubKey;
scriptPubKey.SetBitcoinAddress(address);
string strError = pwalletMain->SendMoney(scriptPubKey, nValue, wtx, true);
strError = pwalletMain->SendMoney(scriptPubKey, nValue, wtx, true);
}
if (strError == "")
wxMessageBox(_("Payment sent "), _("Sending..."));
else if (strError == "ABORTED")
@ -2192,7 +2190,6 @@ void CSendDialog::OnButtonSend(wxCommandEvent& event)
if (fWasLocked)
pwalletMain->Lock();
}
}
else
{
// Parse IP address
@ -2212,7 +2209,7 @@ void CSendDialog::OnButtonSend(wxCommandEvent& event)
return;
}
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
if (!pwalletMain->mapAddressBook.count(address))
pwalletMain->SetAddressBookName(strAddress, "");
@ -2464,8 +2461,6 @@ void CSendingDialog::OnReply2(CDataStream& vRecv)
return;
}
CRITICAL_BLOCK(cs_main)
{
// Pay
if (!Status(_("Creating transaction...")))
return;
@ -2477,13 +2472,17 @@ void CSendingDialog::OnReply2(CDataStream& vRecv)
CReserveKey reservekey(pwalletMain);
int64 nFeeRequired;
CRITICAL_BLOCK(pwalletMain->cs_vMasterKey)
{
bool fWasLocked = pwalletMain->IsLocked();
if (!GetWalletPassphrase())
return;
if (!pwalletMain->CreateTransaction(scriptPubKey, nPrice, wtx, reservekey, nFeeRequired))
bool fTxCreated = false;
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
fTxCreated = pwalletMain->CreateTransaction(scriptPubKey, nPrice, wtx, reservekey, nFeeRequired);
}
if (!fTxCreated)
{
if (nPrice + nFeeRequired > pwalletMain->GetBalance())
Error(strprintf(_("This transaction requires a transaction fee of at least %s because of its amount, complexity, or use of recently received funds"), FormatMoney(nFeeRequired).c_str()));
@ -2494,7 +2493,6 @@ void CSendingDialog::OnReply2(CDataStream& vRecv)
if (fWasLocked)
pwalletMain->Lock();
}
// Transaction fee
if (!ThreadSafeAskFee(nFeeRequired, _("Sending..."), this))
@ -2527,7 +2525,13 @@ void CSendingDialog::OnReply2(CDataStream& vRecv)
return;
// Commit
if (!pwalletMain->CommitTransaction(wtx, reservekey))
bool fTxCommitted = false;
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
fTxCommitted = pwalletMain->CommitTransaction(wtx, reservekey);
}
if (!fTxCommitted)
{
Error(_("The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here."));
return;
@ -2540,7 +2544,6 @@ void CSendingDialog::OnReply2(CDataStream& vRecv)
Status(_("Waiting for confirmation..."));
MainFrameRepaint();
}
}
void SendingDialogOnReply3(void* parg, CDataStream& vRecv)
@ -2621,7 +2624,7 @@ CAddressBookDialog::CAddressBookDialog(wxWindow* parent, const wxString& strInit
m_listCtrlReceiving->SetFocus();
// Fill listctrl with address book data
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
string strDefaultReceiving = (string)pframeMain->m_textCtrlAddress->GetValue();
BOOST_FOREACH(const PAIRTYPE(CBitcoinAddress, string)& item, pwalletMain->mapAddressBook)
@ -2682,7 +2685,7 @@ void CAddressBookDialog::OnListEndLabelEdit(wxListEvent& event)
if (event.IsEditCancelled())
return;
string strAddress = (string)GetItemText(m_listCtrl, event.GetIndex(), 1);
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
pwalletMain->SetAddressBookName(strAddress, string(event.GetText()));
pframeMain->RefreshListCtrl();
}
@ -2718,7 +2721,7 @@ void CAddressBookDialog::OnButtonDelete(wxCommandEvent& event)
if (m_listCtrl->GetItemState(nIndex, wxLIST_STATE_SELECTED))
{
string strAddress = (string)GetItemText(m_listCtrl, nIndex, 1);
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
pwalletMain->DelAddressBookName(strAddress);
m_listCtrl->DeleteItem(nIndex);
}
@ -2778,7 +2781,7 @@ void CAddressBookDialog::OnButtonEdit(wxCommandEvent& event)
}
// Write back
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
{
if (strAddress != strAddressOrg)
pwalletMain->DelAddressBookName(strAddressOrg);
@ -2818,8 +2821,6 @@ void CAddressBookDialog::OnButtonNew(wxCommandEvent& event)
return;
strName = dialog.GetValue();
CRITICAL_BLOCK(pwalletMain->cs_vMasterKey)
{
bool fWasLocked = pwalletMain->IsLocked();
if (!GetWalletPassphrase())
return;
@ -2830,10 +2831,9 @@ void CAddressBookDialog::OnButtonNew(wxCommandEvent& event)
if (fWasLocked)
pwalletMain->Lock();
}
}
// Add to list and select it
CRITICAL_BLOCK(pwalletMain->cs_mapAddressBook)
CRITICAL_BLOCK(pwalletMain->cs_wallet)
pwalletMain->SetAddressBookName(strAddress, strName);
int nIndex = InsertLine(m_listCtrl, strName, strAddress);
SetSelection(m_listCtrl, nIndex);

16
src/wallet.cpp
View File

@ -353,22 +353,6 @@ int64 CWallet::GetDebit(const CTxIn &txin) const
int64 CWalletTx::GetTxTime() const
{
CRITICAL_BLOCK(cs_main)
{
if (!fTimeReceivedIsTxTime && hashBlock != 0)
{
// If we did not receive the transaction directly, we rely on the block's
// time to figure out when it happened. We use the median over a range
// of blocks to try to filter out inaccurate block times.
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
if (mi != mapBlockIndex.end())
{
CBlockIndex* pindex = (*mi).second;
if (pindex)
return pindex->GetMedianTime();
}
}
}
return nTimeReceived;
}