From 068a8fc05f8dbec198bdc3fe46f955d8a5255303 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Barbosa?= <joao.paulo.barbosa@gmail.com>
Date: Wed, 2 Jan 2019 12:34:39 +0000
Subject: [PATCH] rpc: Track active commands

---
 src/rpc/server.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index 5b4d8e2f3d..926fabe6af 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -32,6 +32,35 @@ static RPCTimerInterface* timerInterface = nullptr;
 /* Map of name to timer. */
 static std::map<std::string, std::unique_ptr<RPCTimerBase> > deadlineTimers;
 
+struct RPCCommandExecutionInfo
+{
+    std::string method;
+    int64_t start;
+};
+
+struct RPCServerInfo
+{
+    Mutex mutex;
+    std::list<RPCCommandExecutionInfo> active_commands GUARDED_BY(mutex);
+};
+
+static RPCServerInfo g_rpc_server_info;
+
+struct RPCCommandExecution
+{
+    std::list<RPCCommandExecutionInfo>::iterator it;
+    explicit RPCCommandExecution(const std::string& method)
+    {
+        LOCK(g_rpc_server_info.mutex);
+        it = g_rpc_server_info.active_commands.insert(g_rpc_server_info.active_commands.cend(), {method, GetTimeMicros()});
+    }
+    ~RPCCommandExecution()
+    {
+        LOCK(g_rpc_server_info.mutex);
+        g_rpc_server_info.active_commands.erase(it);
+    }
+};
+
 static struct CRPCSignals
 {
     boost::signals2::signal<void ()> Started;
@@ -485,6 +514,7 @@ UniValue CRPCTable::execute(const JSONRPCRequest &request) const
 
     try
     {
+        RPCCommandExecution execution(request.strMethod);
         // Execute, convert arguments to array if necessary
         if (request.params.isObject()) {
             return pcmd->actor(transformNamedArguments(request, pcmd->argNames));