node: Add chainman alias for g_chainman

src/init.cpp

@@ -244,9 +244,9 @@ void Shutdown(NodeContext& node)
     }
 
     // FlushStateToDisk generates a ChainStateFlushed callback, which we should avoid missing
-    {
+    if (node.chainman) {
         LOCK(cs_main);
-        for (CChainState* chainstate : g_chainman.GetAll()) {
+        for (CChainState* chainstate : node.chainman->GetAll()) {
             if (chainstate->CanFlushToDisk()) {
                 chainstate->ForceFlushStateToDisk();
             }
@@ -271,9 +271,9 @@ void Shutdown(NodeContext& node)
     // up with our current chain to avoid any strange pruning edge cases and make
     // next startup faster by avoiding rescan.
 
-    {
+    if (node.chainman) {
         LOCK(cs_main);
-        for (CChainState* chainstate : g_chainman.GetAll()) {
+        for (CChainState* chainstate : node.chainman->GetAll()) {
             if (chainstate->CanFlushToDisk()) {
                 chainstate->ForceFlushStateToDisk();
                 chainstate->ResetCoinsViews();
@@ -299,7 +299,8 @@ void Shutdown(NodeContext& node)
     globalVerifyHandle.reset();
     ECC_Stop();
     node.args = nullptr;
-    if (node.mempool) node.mempool = nullptr;
+    node.mempool = nullptr;
+    node.chainman = nullptr;
     node.scheduler.reset();
 
     try {
@@ -689,7 +690,7 @@ static void CleanupBlockRevFiles()
     }
 }
 
-static void ThreadImport(std::vector<fs::path> vImportFiles)
+static void ThreadImport(ChainstateManager& chainman, std::vector<fs::path> vImportFiles)
 {
     const CChainParams& chainparams = Params();
     util::ThreadRename("loadblk");
@@ -741,9 +742,9 @@ static void ThreadImport(std::vector<fs::path> vImportFiles)
     // scan for better chains in the block chain database, that are not yet connected in the active best chain
 
     // We can't hold cs_main during ActivateBestChain even though we're accessing
-    // the g_chainman unique_ptrs since ABC requires us not to be holding cs_main, so retrieve
+    // the chainman unique_ptrs since ABC requires us not to be holding cs_main, so retrieve
     // the relevant pointers before the ABC call.
-    for (CChainState* chainstate : WITH_LOCK(::cs_main, return g_chainman.GetAll())) {
+    for (CChainState* chainstate : WITH_LOCK(::cs_main, return chainman.GetAll())) {
         BlockValidationState state;
         if (!chainstate->ActivateBestChain(state, chainparams, nullptr)) {
             LogPrintf("Failed to connect best block (%s)\n", state.ToString());
@@ -1377,6 +1378,9 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
     // which are all started after this, may use it from the node context.
     assert(!node.mempool);
     node.mempool = &::mempool;
+    assert(!node.chainman);
+    node.chainman = &g_chainman;
+    ChainstateManager& chainman = EnsureChainman(node);
 
     node.peer_logic.reset(new PeerLogicValidation(node.connman.get(), node.banman.get(), *node.scheduler, *node.mempool));
     RegisterValidationInterface(node.peer_logic.get());
@@ -1557,7 +1561,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
             const int64_t load_block_index_start_time = GetTimeMillis();
             try {
                 LOCK(cs_main);
-                g_chainman.InitializeChainstate();
+                chainman.InitializeChainstate();
                 UnloadBlockIndex();
 
                 // new CBlockTreeDB tries to delete the existing file, which
@@ -1612,7 +1616,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
 
                 bool failed_chainstate_init = false;
 
-                for (CChainState* chainstate : g_chainman.GetAll()) {
+                for (CChainState* chainstate : chainman.GetAll()) {
                     LogPrintf("Initializing chainstate %s\n", chainstate->ToString());
                     chainstate->InitCoinsDB(
                         /* cache_size_bytes */ nCoinDBCache,
@@ -1667,7 +1671,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
             bool failed_rewind{false};
             // Can't hold cs_main while calling RewindBlockIndex, so retrieve the relevant
             // chainstates beforehand.
-            for (CChainState* chainstate : WITH_LOCK(::cs_main, return g_chainman.GetAll())) {
+            for (CChainState* chainstate : WITH_LOCK(::cs_main, return chainman.GetAll())) {
                 if (!fReset) {
                     // Note that RewindBlockIndex MUST run even if we're about to -reindex-chainstate.
                     // It both disconnects blocks based on the chainstate, and drops block data in
@@ -1692,7 +1696,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
             try {
                 LOCK(cs_main);
 
-                for (CChainState* chainstate : g_chainman.GetAll()) {
+                for (CChainState* chainstate : chainman.GetAll()) {
                     if (!is_coinsview_empty(chainstate)) {
                         uiInterface.InitMessage(_("Verifying blocks...").translated);
                         if (fHavePruned && gArgs.GetArg("-checkblocks", DEFAULT_CHECKBLOCKS) > MIN_BLOCKS_TO_KEEP) {
@@ -1798,7 +1802,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
         nLocalServices = ServiceFlags(nLocalServices & ~NODE_NETWORK);
         if (!fReindex) {
             LOCK(cs_main);
-            for (CChainState* chainstate : g_chainman.GetAll()) {
+            for (CChainState* chainstate : chainman.GetAll()) {
                 uiInterface.InitMessage(_("Pruning blockstore...").translated);
                 chainstate->PruneAndFlush();
             }
@@ -1841,7 +1845,7 @@ bool AppInitMain(const util::Ref& context, NodeContext& node)
         vImportFiles.push_back(strFile);
     }
 
-    threadGroup.create_thread(std::bind(&ThreadImport, vImportFiles));
+    threadGroup.create_thread([=, &chainman] { ThreadImport(chainman, vImportFiles); });
 
     // Wait for genesis block to be processed
     {

src/node/context.h

@@ -5,6 +5,7 @@
 #ifndef BITCOIN_NODE_CONTEXT_H
 #define BITCOIN_NODE_CONTEXT_H
 
+#include <cassert>
 #include <memory>
 #include <vector>
 
@@ -13,6 +14,7 @@ class BanMan;
 class CConnman;
 class CScheduler;
 class CTxMemPool;
+class ChainstateManager;
 class PeerLogicValidation;
 namespace interfaces {
 class Chain;
@@ -33,6 +35,7 @@ struct NodeContext {
     std::unique_ptr<CConnman> connman;
     CTxMemPool* mempool{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
     std::unique_ptr<PeerLogicValidation> peer_logic;
+    ChainstateManager* chainman{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
     std::unique_ptr<BanMan> banman;
     ArgsManager* args{nullptr}; // Currently a raw pointer because the memory is not managed by this struct
     std::unique_ptr<interfaces::Chain> chain;
@@ -46,4 +49,10 @@ struct NodeContext {
     ~NodeContext();
 };
 
+inline ChainstateManager& EnsureChainman(const NodeContext& node)
+{
+    assert(node.chainman);
+    return *node.chainman;
+}
+
 #endif // BITCOIN_NODE_CONTEXT_H

src/test/util/setup_common.cpp

@@ -134,7 +134,8 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
 
     pblocktree.reset(new CBlockTreeDB(1 << 20, true));
 
-    g_chainman.InitializeChainstate();
+    m_node.chainman = &::g_chainman;
+    m_node.chainman->InitializeChainstate();
     ::ChainstateActive().InitCoinsDB(
         /* cache_size_bytes */ 1 << 23, /* in_memory */ true, /* should_wipe */ false);
     assert(!::ChainstateActive().CanFlushToDisk());
@@ -181,7 +182,8 @@ TestingSetup::~TestingSetup()
     m_node.mempool = nullptr;
     m_node.scheduler.reset();
     UnloadBlockIndex();
-    g_chainman.Reset();
+    m_node.chainman->Reset();
+    m_node.chainman = nullptr;
     pblocktree.reset();
 }
 

src/validation.h

@@ -43,6 +43,7 @@ class CConnman;
 class CScriptCheck;
 class CBlockPolicyEstimator;
 class CTxMemPool;
+class ChainstateManager;
 class TxValidationState;
 struct ChainTxData;
 
@@ -493,9 +494,6 @@ enum class CoinsCacheSizeState
     OK = 0
 };
 
-// Defined below, but needed for `friend` usage in CChainState.
-class ChainstateManager;
-
 /**
  * CChainState stores and provides an API to update our local knowledge of the
  * current best chain.