merge bitcoin#16033: Hold cs_main when reading chainActive via getTipLocator(). Remove assumeLocked().

src/interfaces/chain.cpp

@@ -38,7 +38,7 @@
 namespace interfaces {
 namespace {
 
-class LockImpl : public Chain::Lock
+class LockImpl : public Chain::Lock, public UniqueLock<CCriticalSection>
 {
     Optional<int> getHeight() override
     {
@@ -171,10 +171,7 @@ class LockImpl : public Chain::Lock
         LockAnnotation lock(::cs_main);
         return CheckFinalTx(tx);
     }
-};
 
-class LockingStateImpl : public LockImpl, public UniqueLock<CCriticalSection>
-{
     using UniqueLock::UniqueLock;
 };
 
@@ -273,13 +270,12 @@ class ChainImpl : public Chain
 public:
     std::unique_ptr<Chain::Lock> lock(bool try_lock) override
     {
-        auto result = MakeUnique<LockingStateImpl>(::cs_main, "cs_main", __FILE__, __LINE__, try_lock);
+        auto result = MakeUnique<LockImpl>(::cs_main, "cs_main", __FILE__, __LINE__, try_lock);
         if (try_lock && result && !*result) return {};
         // std::move necessary on some compilers due to conversion from
-        // LockingStateImpl to Lock pointer
+        // LockImpl to Lock pointer
         return std::move(result);
     }
-    std::unique_ptr<Chain::Lock> assumeLocked() override { return MakeUnique<LockImpl>(); }
     bool findBlock(const uint256& hash, CBlock* block, int64_t* time, int64_t* time_max) override
     {
         CBlockIndex* index;

src/interfaces/chain.h

@@ -147,11 +147,6 @@ public:
     //! unlocked when the returned interface is freed.
     virtual std::unique_ptr<Lock> lock(bool try_lock = false) = 0;
 
-    //! Return Lock interface assuming chain is already locked. This
-    //! method is temporary and is only used in a few places to avoid changing
-    //! behavior while code is transitioned to use the Chain::Lock interface.
-    virtual std::unique_ptr<Lock> assumeLocked() = 0;
-
     //! Return whether node has the block and optionally return block metadata
     //! or contents.
     //!

src/wallet/test/wallet_tests.cpp

@@ -369,7 +369,10 @@ public:
         int changePos = -1;
         std::string error;
         CCoinControl dummy;
-        BOOST_CHECK(wallet->CreateTransaction(*m_locked_chain, {recipient}, tx, reservekey, fee, changePos, error, dummy));
+        {
+            auto locked_chain = m_chain->lock();
+            BOOST_CHECK(wallet->CreateTransaction(*locked_chain, {recipient}, tx, reservekey, fee, changePos, error, dummy));
+        }
         CValidationState state;
         BOOST_CHECK(wallet->CommitTransaction(tx, {}, {}, reservekey, state));
         CMutableTransaction blocktx;
@@ -388,7 +391,6 @@ public:
     }
 
     std::unique_ptr<interfaces::Chain> m_chain = interfaces::MakeChain();
-    std::unique_ptr<interfaces::Chain::Lock> m_locked_chain = m_chain->assumeLocked();  // Temporary. Removed in upcoming lock cleanup
     std::unique_ptr<CWallet> wallet;
 };
 
@@ -400,8 +402,9 @@ BOOST_FIXTURE_TEST_CASE(ListCoins, ListCoinsTestingSetup)
     // address.
     std::map<CTxDestination, std::vector<COutput>> list;
     {
-        LOCK2(cs_main, wallet->cs_wallet);
+        auto locked_chain = m_chain->lock();
-        list = wallet->ListCoins(*m_locked_chain);
+        LOCK(wallet->cs_wallet);
+        list = wallet->ListCoins(*locked_chain);
     }
     BOOST_CHECK_EQUAL(list.size(), 1U);
     BOOST_CHECK_EQUAL(boost::get<CKeyID>(list.begin()->first).ToString(), coinbaseAddress);
@@ -416,8 +419,9 @@ BOOST_FIXTURE_TEST_CASE(ListCoins, ListCoinsTestingSetup)
     // pubkey.
     AddTx(CRecipient{GetScriptForRawPubKey({}), 1 * COIN, false /* subtract fee */});
     {
-        LOCK2(cs_main, wallet->cs_wallet);
+        auto locked_chain = m_chain->lock();
-        list = wallet->ListCoins(*m_locked_chain);
+        LOCK(wallet->cs_wallet);
+        list = wallet->ListCoins(*locked_chain);
     }
     BOOST_CHECK_EQUAL(list.size(), 1U);
     BOOST_CHECK_EQUAL(boost::get<CKeyID>(list.begin()->first).ToString(), coinbaseAddress);
@@ -425,9 +429,10 @@ BOOST_FIXTURE_TEST_CASE(ListCoins, ListCoinsTestingSetup)
 
     // Lock both coins. Confirm number of available coins drops to 0.
     {
-        LOCK2(cs_main, wallet->cs_wallet);
+        auto locked_chain = m_chain->lock();
+        LOCK(wallet->cs_wallet);
         std::vector<COutput> available;
-        wallet->AvailableCoins(*m_locked_chain, available);
+        wallet->AvailableCoins(*locked_chain, available);
         BOOST_CHECK_EQUAL(available.size(), 2U);
     }
     for (const auto& group : list) {
@@ -437,16 +442,18 @@ BOOST_FIXTURE_TEST_CASE(ListCoins, ListCoinsTestingSetup)
         }
     }
     {
-        LOCK2(cs_main, wallet->cs_wallet);
+        auto locked_chain = m_chain->lock();
+        LOCK(wallet->cs_wallet);
         std::vector<COutput> available;
-        wallet->AvailableCoins(*m_locked_chain, available);
+        wallet->AvailableCoins(*locked_chain, available);
         BOOST_CHECK_EQUAL(available.size(), 0U);
     }
     // Confirm ListCoins still returns same result as before, despite coins
     // being locked.
     {
-        LOCK2(cs_main, wallet->cs_wallet);
+        auto locked_chain = m_chain->lock();
-        list = wallet->ListCoins(*m_locked_chain);
+        LOCK(wallet->cs_wallet);
+        list = wallet->ListCoins(*locked_chain);
     }
     BOOST_CHECK_EQUAL(list.size(), 1U);
     BOOST_CHECK_EQUAL(boost::get<CKeyID>(list.begin()->first).ToString(), coinbaseAddress);

src/wallet/wallet.cpp

@@ -5019,7 +5019,7 @@ std::shared_ptr<CWallet> CWallet::CreateWalletFromFile(interfaces::Chain& chain,
             return error(_("Unable to generate initial keys"));
         }
 
-        auto locked_chain = chain.assumeLocked();  // Temporary. Removed in upcoming lock cleanup
+        auto locked_chain = chain.lock();
         walletInstance->ChainStateFlushed(locked_chain->getTipLocator());
 
         // Try to create wallet backup right after new wallet was created