Merge #14772: refactor: Convert comments to thread safety annotations

fa71eb5196 Convert comments to thread safety annotations (MarcoFalke)

Pull request description:

  Convert human-only-readable annotations to human-and-machine-readable annotations.

Tree-SHA512: 98a97b32b50e8ec816626ed853d56c9afb31065eb14f058cda8f22a16ddd2b0c02911f9e30478aa347f466891f972496d89a828eb6e4662fb712d7d9e7643d49

src/net.cpp

@@ -1011,6 +1011,7 @@ bool CConnman::AttemptToEvictConnection()
                 continue;
             if (node->fDisconnect)
                 continue;
+            LOCK(node->cs_filter);
             NodeEvictionCandidate candidate = {node->GetId(), node->nTimeConnected, node->nMinPingUsecTime,
                                                node->nLastBlockTime, node->nLastTXTime,
                                                HasAllDesirableServiceFlags(node->nServices),

src/net.h

@@ -677,10 +677,10 @@ public:
     // a) it allows us to not relay tx invs before receiving the peer's version message
     // b) the peer may tell us in its version message that we should not relay tx invs
     //    unless it loads a bloom filter.
-    bool fRelayTxes; //protected by cs_filter
+    bool fRelayTxes GUARDED_BY(cs_filter);
     bool fSentAddr;
     CSemaphoreGrant grantOutbound;
-    CCriticalSection cs_filter;
+    mutable CCriticalSection cs_filter;
     std::unique_ptr<CBloomFilter> pfilter;
     std::atomic<int> nRefCount;
 
@@ -718,10 +718,9 @@ public:
     std::multimap<int64_t, CInv> mapAskFor;
     int64_t nNextInvSend;
     // Used for headers announcements - unfiltered blocks to relay
-    // Also protected by cs_inventory
-    std::vector<uint256> vBlockHashesToAnnounce;
-    // Used for BIP35 mempool sending, also protected by cs_inventory
-    bool fSendMempool;
+    std::vector<uint256> vBlockHashesToAnnounce GUARDED_BY(cs_inventory);
+    // Used for BIP35 mempool sending
+    bool fSendMempool GUARDED_BY(cs_inventory);
 
     // Last time a "MEMPOOL" request was serviced.
     std::atomic<int64_t> timeLastMempoolReq;

src/validation.cpp

@@ -1680,8 +1680,7 @@ void ThreadScriptCheck() {
     scriptcheckqueue.Thread();
 }
 
-// Protected by cs_main
-VersionBitsCache versionbitscache;
+VersionBitsCache versionbitscache GUARDED_BY(cs_main);
 
 int32_t ComputeBlockVersion(const CBlockIndex* pindexPrev, const Consensus::Params& params)
 {
@@ -1722,8 +1721,7 @@ public:
     }
 };
 
-// Protected by cs_main
-static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS];
+static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS] GUARDED_BY(cs_main);
 
 // 0.13.0 was shipped with a segwit deployment defined for testnet, but not for
 // mainnet. We no longer need to support disabling the segwit deployment