Lock vnThreadsRunning[THREAD_RPCHANDLER].

src/bitcoinrpc.cpp

@@ -2913,10 +2913,15 @@ void ThreadRPCServer2(void* parg)
     StopRequests();
 }
 
+static CCriticalSection cs_THREAD_RPCHANDLER;
+
 void ThreadRPCServer3(void* parg)
 {
     IMPLEMENT_RANDOMIZE_STACK(ThreadRPCServer3(parg));
+    {
+        LOCK(cs_THREAD_RPCHANDLER);
         vnThreadsRunning[THREAD_RPCHANDLER]++;
+    }
     AcceptedConnection *conn = (AcceptedConnection *) parg;
 
     bool fRun = true;
@@ -2925,7 +2930,10 @@ void ThreadRPCServer3(void* parg)
         {
             conn->close();
             delete conn;
+            {
+                LOCK(cs_THREAD_RPCHANDLER);
                 --vnThreadsRunning[THREAD_RPCHANDLER];
+            }
             return;
         }
         map<string, string> mapHeaders;
@@ -3005,7 +3013,10 @@ void ThreadRPCServer3(void* parg)
     }
 
     delete conn;
+    {
+        LOCK(cs_THREAD_RPCHANDLER);
         vnThreadsRunning[THREAD_RPCHANDLER]--;
+    }
 }
 
 json_spirit::Value CRPCTable::execute(const std::string &strMethod, const json_spirit::Array &params) const