Update alignments.

[beam_stats.git] / src / beam_stats_process.erl

diff --git a/src/beam_stats_process.erl b/src/beam_stats_process.erl
index e2751ea..5dc64d7 100644 (file)
--- a/src/beam_stats_process.erl
+++ b/src/beam_stats_process.erl
@@ -11,7 +11,7 @@
     ]).
 
 -export(
-    [ of_pid/1
+    [ of_pid/2
     , get_best_known_origin/1
     , print/1
     ]).
@@ -42,26 +42,35 @@
 %% Public API
 %% ============================================================================
 
--spec of_pid(pid()) ->
-    t().
-of_pid(Pid) ->
-    Dict = pid_info_exn(Pid, dictionary),
-    Ancestry =
-        #beam_stats_process_ancestry
-        { raw_initial_call  = pid_info_exn(Pid, initial_call)
-        , otp_initial_call  = hope_kv_list:get(Dict, '$initial_call')
-        , otp_ancestors     = hope_kv_list:get(Dict, '$ancestors')
-        },
-    ?T
-    { pid               = Pid
-    , registered_name   = pid_info_opt(Pid, registered_name)
-    , ancestry          = Ancestry
-    , status            = pid_info_exn(Pid, status)
-    , memory            = pid_info_exn(Pid, memory)
-    , total_heap_size   = pid_info_exn(Pid, total_heap_size)
-    , stack_size        = pid_info_exn(Pid, stack_size)
-    , message_queue_len = pid_info_exn(Pid, message_queue_len)
-    }.
+-spec of_pid(pid(), beam_stats_delta:t()) ->
+      none        % when process is dead
+    | {some, t()} % when process is alive
+    .
+of_pid(Pid, DeltasServer) ->
+    try
+        Dict = pid_info_exn(Pid, dictionary),
+        Ancestry =
+            #beam_stats_process_ancestry
+            { raw_initial_call  = pid_info_exn(Pid, initial_call)
+            , otp_initial_call  = hope_kv_list:get(Dict, '$initial_call')
+            , otp_ancestors     = hope_kv_list:get(Dict, '$ancestors')
+            },
+        T =
+            ?T
+            { pid               = Pid
+            , registered_name   = pid_info_opt(Pid, registered_name)
+            , ancestry          = Ancestry
+            , status            = pid_info_exn(Pid, status)
+            , memory            = pid_info_exn(Pid, memory)
+            , total_heap_size   = pid_info_exn(Pid, total_heap_size)
+            , stack_size        = pid_info_exn(Pid, stack_size)
+            , message_queue_len = pid_info_exn(Pid, message_queue_len)
+            , reductions        = pid_info_reductions(Pid, DeltasServer)
+            },
+        {some, T}
+    catch throw:{process_dead, _} ->
+        none
+    end.
 
 -spec print(t()) ->
     ok.
@@ -70,15 +79,16 @@ print(
     { pid               = Pid
     , registered_name   = RegisteredNameOpt
     , ancestry          = #beam_stats_process_ancestry
-        { raw_initial_call  = InitialCallRaw
-        , otp_initial_call  = InitialCallOTPOpt
-        , otp_ancestors     = AncestorsOpt
+        { raw_initial_call = InitialCallRaw
+        , otp_initial_call = InitialCallOTPOpt
+        , otp_ancestors    = AncestorsOpt
         }
     , status            = Status
     , memory            = Memory
     , total_heap_size   = TotalHeapSize
     , stack_size        = StackSize
     , message_queue_len = MsgQueueLen
+    , reductions        = Reductions
     }=T
 ) ->
     BestKnownOrigin = get_best_known_origin(T),
@@ -95,6 +105,7 @@ print(
         "TotalHeapSize     : ~p~n"
         "StackSize         : ~p~n"
         "MsgQueueLen       : ~p~n"
+        "Reductions        : ~p~n"
         "~n",
         [ Pid
         , BestKnownOrigin
@@ -107,6 +118,7 @@ print(
         , TotalHeapSize
         , StackSize
         , MsgQueueLen
+        , Reductions
         ]
     ).
 
@@ -114,6 +126,16 @@ print(
 %% Private helpers
 %% ============================================================================
 
+-spec pid_info_reductions(pid(), beam_stats_delta:t()) ->
+    non_neg_integer().
+pid_info_reductions(Pid, DeltasServer) ->
+    case beam_stats_delta:of_process_info_reductions(DeltasServer, Pid)
+    of  {some, Reductions} ->
+            Reductions
+    ;   none ->
+            throw({process_dead, Pid})
+    end.
+
 pid_info_exn(Pid, Key) ->
     {some, Value} = pid_info_opt(Pid, Key),
     Value.
@@ -122,6 +144,7 @@ pid_info_opt(Pid, Key) ->
     case {Key, beam_stats_source:erlang_process_info(Pid, Key)}
     of  {registered_name, []}           -> none
     ;   {_              , {Key, Value}} -> {some, Value}
+    ;   {_              , undefined}    -> throw({process_dead, Pid})
     end.
 
 %% ============================================================================