[net processing] Annotate nUnconnectingHeaders as guarded by g_msgproc_mutex

Author: dergoegge

src/net_processing.cpp

@@ -415,7 +415,7 @@ struct CNodeState {
     //! The best header we have sent our peer.
     const CBlockIndex* pindexBestHeaderSent{nullptr};
     //! Length of current-streak of unconnecting headers announcements
-    int nUnconnectingHeaders{0};
+    int nUnconnectingHeaders GUARDED_BY(NetEventsInterface::g_msgproc_mutex){0};
     //! Whether we've started headers synchronization with this peer.
     bool fSyncStarted{false};
     //! When to potentially disconnect peer for stalling headers download
@@ -666,7 +666,8 @@ class PeerManagerImpl final : public PeerManager
     /** Potentially fetch blocks from this peer upon receipt of a new headers tip */
     void HeadersDirectFetchBlocks(CNode& pfrom, const Peer& peer, const CBlockIndex& last_header);
     /** Update peer state based on received headers message */
-    void UpdatePeerStateForReceivedHeaders(CNode& pfrom, const CBlockIndex& last_header, bool received_new_header, bool may_have_more_headers);
+    void UpdatePeerStateForReceivedHeaders(CNode& pfrom, const CBlockIndex& last_header, bool received_new_header, bool may_have_more_headers)
+        EXCLUSIVE_LOCKS_REQUIRED(g_msgproc_mutex);
 
     void SendBlockTransactions(CNode& pfrom, Peer& peer, const CBlock& block, const BlockTransactionsRequest& req);