diff options
| author | Wladimir J. van der Laan <laanwj@protonmail.com> | 2020-03-31 14:25:04 +0200 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@protonmail.com> | 2020-03-31 15:07:06 +0200 |
| commit | 9a2b5f22c1f603a6e3abc16dbf074c8d33a8d01f (patch) | |
| tree | 670aad25a0b3916ae7cc5608c8be2fbff31cdb84 /src/wallet/wallet.h | |
| parent | f2880e21eff2428615ee3024570c4861d3238107 (diff) | |
| parent | 41b0baf43c243b64b394e774e336475a489cca2b (diff) | |
| download | bitcoin-9a2b5f22c1f603a6e3abc16dbf074c8d33a8d01f.tar.xz | |
Merge #18338: Fix wallet unload race condition
41b0baf43c243b64b394e774e336475a489cca2b gui: Handle WalletModel::unload asynchronous (João Barbosa)
ab31b9d6fe7b39713682e3f52d11238dbe042c16 Fix wallet unload race condition (Russell Yanofsky)
Pull request description:
This PR consists in two fixes. The first fixes a concurrency issues with `boost::signals2`. The second fixes a wallet model destruction while it's being used.
From boost signal documentation at https://www.boost.org/doc/libs/1_72_0/doc/html/signals2/thread-safety.html:
> When a signal is invoked by calling signal::operator(), the invocation first acquires a lock on the signal's mutex. Then it obtains a handle to the signal's slot list and combiner. Next it releases the signal's mutex, before invoking the combiner to iterate through the slot list.
This means that `UnregisterValidationInterface` doesn't prevent more calls to that interface. The fix consists in capturing the `shared_ptr<CValidationInterface>` in each internal slot.
The GUI bug is fixed by using a `Qt::QueuedConnection` in the `WalletModel::unload` connection.
ACKs for top commit:
ryanofsky:
Code review ACK 41b0baf43c243b64b394e774e336475a489cca2b. Only change is moving assert as suggested
hebasto:
ACK 41b0baf43c243b64b394e774e336475a489cca2b, tested on Linux Mint 19.3.
Tree-SHA512: 4f712d8de65bc1214411831250de5dc0a9fd505fb84da5baf9f2cc4d551bc3abffc061616f00afe43dba7525af2cd96c9b54aeead9383145e3b8801f25d85f50
Diffstat (limited to 'src/wallet/wallet.h')
| -rw-r--r-- | src/wallet/wallet.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h index 9a83c84fc4..fe59773488 100644 --- a/src/wallet/wallet.h +++ b/src/wallet/wallet.h @@ -606,7 +606,7 @@ class WalletRescanReserver; //forward declarations for ScanForWalletTransactions /** * A CWallet maintains a set of transactions and balances, and provides the ability to create new transactions. */ -class CWallet final : public WalletStorage, private interfaces::Chain::Notifications +class CWallet final : public WalletStorage, public interfaces::Chain::Notifications { private: CKeyingMaterial vMasterKey GUARDED_BY(cs_wallet); @@ -782,9 +782,6 @@ public: /** Registered interfaces::Chain::Notifications handler. */ std::unique_ptr<interfaces::Handler> m_chain_notifications_handler; - /** Register the wallet for chain notifications */ - void handleNotifications(); - /** Interface for accessing chain state. */ interfaces::Chain& chain() const { assert(m_chain); return *m_chain; } |